Angle clamp adjuster for burn testing and method

Abstract

The present application relates to the technical field of aircraft cabin material flame retardant performance test, and discloses an angle clamping adjuster for combustion test, which comprises a support and a clamping device assembly;The support comprises a first crossbeam, a second crossbeam and a third crossbeam fixedly installed;The clamping device assembly comprises a vertical seat type clamp and a suspension type clamp;The suspension type clamp comprises a first angle clamp, a second angle clamp and a third angle clamp with different suspension assemblies;Different suspension assemblies are used to match different crossbeam combinations for clamp suspension;The vertical seat type clamp comprises a base, which clamps the test piece for combustion test at a position close to the support;The spacing of the suspension assembly of the clamping device assembly is determined by the spacing snap ring type of the crossbeam of the support, so that the crossbeam of the support can be adapted to clamps of various angles after being fixed, can meet the suspension use of clamps of various angles, realize the quick switching between clamps of different angles, and greatly reduce the switching time of the clamp tooling.

Description

Technical Field

[0001] This invention relates to the field of flame retardant performance testing technology for materials inside aircraft cabins, specifically to an angle clamping adjuster and method for combustion testing. Background Technology

[0002] Materials used in aviation require very rigorous performance testing, including different types of combustion tests. Based on the results of these combustion tests, materials are rated accordingly to ensure their performance grade.

[0003] The types of combustion tests include vertical and horizontal combustion tests for materials inside the cabin (including coatings or finishes used for materials); 45-degree combustion tests for all other materials constituting the cargo hold or baggage hold; and 60-degree tests for the insulation of wires or cables installed in any area of ​​the fuselage, which must be self-extinguishing during the 60-degree test.

[0004] Current combustion tests involve conducting multiple types of combustion tests within a single combustion chamber, using clamping fixtures at different angles. A problem with the clamping fixtures is their inefficient structure. While the tests themselves are relatively short (e.g., 12, 15, 30, 60 seconds), switching between different types of clamps is time-consuming and labor-intensive. It requires constant adjustments to the height of the support beams, the spacing between multiple beams, or even removing beams to create vertical beams to accommodate different clamping fixture structures. Because vertical and horizontal combustion tests are performed frequently, switching from vertical or horizontal combustion test fixtures to other angles is common. Changing the test fixture to a horizontal combustion test fixture takes about 30 minutes, changing it from a vertical combustion test fixture to a 45-degree combustion test fixture takes about 50 minutes, and changing it from a vertical combustion test fixture to a 60-degree combustion test fixture is the most complex, requiring the addition of crossbeams and adjustment of the fixture's inclination in conjunction with other crossbeams. The entire adjustment process may take 80 minutes. Compared to the test time, the fixture adjustment time is too long, and the positioning accuracy is poor, varying from person to person and cannot be controlled within the standard range. In addition, after clamping the specimen on the fixture, different types of combustion tests have different distance requirements between the lower edge of the specimen and the ignition source. On the basis of changing and adjusting the fixture, repeated adjustments are required in combination with the above distance requirements, resulting in poor distance control accuracy.

[0005] To address the above issues, conventional solutions include using multiple combustion chambers to conduct different types of tests, especially for 60-degree combustion tests, which utilize dedicated combustion chambers to avoid tooling changes and reduce tooling changeover time. However, this approach increases costs, expands the scope of test operations, and for 60-degree combustion tests, which are not conducted frequently, the utilization rate of a single combustion chamber is too low. Summary of the Invention

[0006] The present invention aims to provide an angle clamping adjuster and method for combustion testing, in order to solve the technical problems of cumbersome clamp switching methods and inaccurate positioning in existing combustion testing.

[0007] The basic solution provided by this invention is as follows: an angle clamping adjuster for combustion testing, including a bracket and a clamping assembly; the bracket includes a first crossbeam, a second crossbeam, and a third crossbeam that are fixedly installed; the clamping assembly includes a standing clamp and a suspended clamp; the suspended clamp includes a first angle clamp, a second angle clamp, and a third angle clamp with different suspension components; different suspension components are used to cooperate with different crossbeam combinations for clamp suspension; the standing clamp includes a base, through which the specimen is clamped for combustion testing near the bracket; the spacing of the first angle clamp suspension components is used to determine the spacing of the first crossbeam and the second crossbeam; the spacing of the second angle clamp suspension components is used to determine the spacing of the second crossbeam and the third crossbeam; the spacing of the first crossbeam and the second crossbeam is used to determine the spacing of the second angle clamp suspension components; and the spacing of the second crossbeam and the third crossbeam is used to determine the height of the standing clamp base.

[0008] The working principle and advantages of this invention are as follows: the crossbeam of the bracket is fixedly connected and does not require adjustment, and the spacing of the crossbeam and the spacing of the clamp assembly and the suspension assembly are compatible. Therefore, when conducting a combustion test, the clamp can be directly suspended on the bracket through the suspension assembly. When switching test types, the previous clamp can be directly removed through the suspension assembly, and then the next clamp can be directly suspended on the bracket to conduct different types of tests.

[0009] Current conventional technical biases hold that the combustion direction is affected by gravity and airflow, and that it maintains a specific direction during the combustion time. Conventional lateral, longitudinal, or specific angle tests are sufficient for current combustion experiments, and there is no motivation to test more different angles. Therefore, there is even less motivation to consider all clamping fixtures in a comprehensive manner to increase the design versatility in terms of structural approach.

[0010] Meanwhile, there is a certain technical contradiction between the clamping force of the fixture and the angle maintenance. During the combustion process, the clamping device will inevitably burn as well. Long-term use will cause deformation and loosening of the clamping force, which will further lead to changes and deviations in the angle. Although it seems that the same fixture is used, its deviation error cannot actually be fixed at the same angle, affecting the test accuracy. The structural design of this solution can burn as little fixture as possible within the test time that meets the test requirements, and only burn the test piece, ensuring that the clamping force meets the requirements within the test time and will not loosen. The design of this structure can facilitate the adjustment of various angle positions for testing.

[0011] Compared with the prior art, the advantages of the present invention are as follows:

[0012] 1) Convenient switching: The spacing of the support beam is determined by the spacing of the clamping components and suspension components, allowing the support beam to be adapted to clamps of various angles after it is fixed. This enables the use of clamps at various angles and allows for quick switching between clamps of different angles, greatly reducing the switching time of clamping fixtures. It also reduces the need to modify the support structure to adapt to clamps of different angles, greatly reducing the complexity of clamping fixture installation, increasing the installation speed, and making operation convenient. At the same time, the clamps are divided into suspended and upright clamps. Suspended clamps are tested by direct suspension or removal, while upright clamps are directly connected to the base and do not need to be suspended from the support. This method is adopted for high-complexity clamps and allows for convenient switching with suspended clamps, further ensuring the speed and efficiency of combustion testing.

[0013] 2) High integration: One bracket can adapt to clamps of various angles, realizing the multi-functionality of a single combustion chamber. It is not limited to high-frequency or low-frequency operation of test types, and is suitable for switching at any time. It avoids adding combustion chambers, expands the test operation range, and meets the maximum integration of functions within a suitable single combustion chamber, thereby improving the performance of the combustion chamber.

[0014] 3) High positioning accuracy: By combining different crossbeams of the bracket with different suspension components of the clamp assembly, the crossbeams serve as both support points and positioning points, enabling the rapid first positioning of different combustion test fixtures.

[0015] Furthermore, the first angle clamp is a vertical clamp; the vertical clamp includes a π-shaped sample holding part and a first suspension assembly fixedly connected to both sides of the sample holding part; the first suspension assembly includes several irregular holes for suspending the vertical clamp on the first crossbeam and the second crossbeam.

[0016] Furthermore, the second angle clamp is a horizontal clamp; the horizontal clamp includes a sample placement platform and a second suspension assembly fixedly connected to both sides of the sample placement platform; the second suspension assembly includes several irregular holes for suspending the horizontal clamp on the first crossbeam and the second crossbeam.

[0017] Furthermore, the third angle clamp is a 60-degree clamp; the 60-degree clamp includes an upper hook, a lower hook, an inclined rod, and a sample clamping structure located on the same vertical plane; the inclined rod is fixedly installed between the upper hook and the lower hook, at a 60-degree angle to the horizontal plane; the upper hook is suspended on the first and second crossbeams, while the lower hook is suspended on the third crossbeam, for suspending the 60-degree clamp on the bracket.

[0018] Furthermore, the sample clamping structure includes a first clamping part and a second clamping part, wherein the first clamping part is fixedly installed on the upper hook member, and the second clamping part is fixedly installed on the lower hook member; the second clamping part has a rotating member for clamping the sample by pressing with a knob.

[0019] Furthermore, the upright fixture includes a 45-degree fixture; the 45-degree fixture includes a base, a rotating and moving mechanism fixedly installed on the base, and a sample placement frame welded at a 45-degree angle to the rotating and moving mechanism; the rotating and moving mechanism is used to rotate the sample placement frame 360 ​​degrees and move it up and down.

[0020] This invention is based on an angle clamping adjuster for combustion testing and also provides an angle clamping adjustment method for combustion testing, which solves the technical problems of cumbersome clamp switching methods and inaccurate positioning in existing combustion testing.

[0021] The method includes the following steps:

[0022] Step 1: Determine the distance between the first and second crossbeams using the spacing of the clamp suspension assemblies with a first angle; determine the distance between the second and third crossbeams using the spacing of the clamp suspension assemblies with a second angle; the spacing of the clamp suspension assemblies with a third angle is determined based on the distance between the first and second crossbeams.

[0023] Step 2: When conducting a combustion test, select clamps with different angles according to different types of combustion tests;

[0024] Step 3: When the fixture is a suspended fixture, suspend the selected fixture on the corresponding beam assembly through its suspension components;

[0025] Step 4: After suspension, position the device according to the set positioning standards; after positioning, conduct the corresponding combustion test;

[0026] Step 5: After the combustion test is completed, remove the clamp from the crossbeam assembly, suspend another suspension clamp on the corresponding crossbeam assembly through its suspension assembly, and repeat Step 4.

[0027] Furthermore, in step one, the distance between the second and third crossbeams is determined by the spacing of the clamp suspension assembly with the second angle; the length of the 60-degree clamping sample is determined by the length of the 60-degree clamping sample; the distance between the upper and lower hooks is determined by the length of the hook; and the distance between the second and third crossbeams is determined by the distance between the upper and lower hooks.

[0028] Furthermore, step one also includes a fixture with a fourth angle that is a stand-type fixture, including a base, a rotating and moving mechanism fixedly installed on the base, and a sample placement frame welded to the rotating and moving mechanism at a 45-degree angle; the height of the rotating and moving mechanism is determined according to the distance between the second crossbeam and the horizontal plane.

[0029] Step three also includes, when the fixture is a stand-up fixture, placing the selected fixture next to the corresponding beam assembly via the base;

[0030] Step five also includes removing the stand-up fixture from the support via the base after the combustion test is completed.

[0031] Beneficial effects: The spacing of the support beam is determined by the interlocking rings of the clamping assembly and suspension components, allowing the support beam to be adapted to clamps of various angles after it is fixed. This satisfies the use of clamps at various angles and enables rapid switching between clamps of different angles, greatly reducing the changeover time of clamping fixtures. At the same time, the clamps are divided into suspended and upright clamps. Suspended clamps are tested by direct suspension or removal, while upright clamps are directly connected to the base and do not need to be suspended on the support. This method is adopted for high-complexity clamps and allows for convenient switching between suspended clamps, further ensuring the speed and efficiency of combustion testing. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the vertical clamp provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of the vertical clamp provided in the embodiment of the present invention when it is suspended on the bracket;

[0034] Figure 3 An exploded view of the horizontal clamp provided in an embodiment of the present invention;

[0035] Figure 4 This is a front view of the horizontal clamp provided in an embodiment of the present invention suspended on a bracket;

[0036] Figure 5 This is a schematic diagram of the structure of the 60-degree clamp provided in the embodiment of the present invention when it is suspended on the bracket;

[0037] Figure 6 This is a right view of the 60-degree clamp provided in this embodiment of the invention suspended on the bracket;

[0038] Figure 7 This is a schematic diagram of the structure of the 45-degree clamp provided in the embodiment of the present invention when it is suspended on the bracket;

[0039] Figure 8 This is a flowchart of the angle clamping adjustment method for combustion testing provided in an embodiment of the present invention. Detailed Implementation

[0040] The following detailed explanation illustrates the specific implementation methods:

[0041] The markings in the accompanying drawings include: bracket 1, first crossbeam 11, second crossbeam 12, third crossbeam 13, combustion chamber bottom surface 2, vertical clamp 3, π-shaped sample clamping part 31, π-shaped part gap 32, left hook part 33, right hook part 34, first irregular hole 35, second irregular hole 36, horizontal clamp 4, first clamping plate 41, second clamping plate 42, hook plate one 43, hook plate two 44, L-shaped positioning part 45, irregular hole one 46, irregular hole two 47, irregular hole three 48, 60-degree clamp 5, upper hook part 51, lower hook part 52, diagonal bar 53, first clamping part 54, second clamping part 55, linear specimen 56, fourth irregular hole 57, 45-degree clamp 6, base 61, rotating and moving mechanism 62, and sample placement frame 63.

[0042] The basic implementation examples are as follows: Figure 1 and 2 As shown: An angle clamping adjuster for combustion testing includes a bracket 1 and a clamping assembly; the clamping assembly includes a standing clamp and a suspended clamp; the suspended clamp includes a first angle clamp, a second angle clamp, and a third angle clamp with different suspension assemblies; different suspension assemblies are used to cooperate with different crossbeam combinations for clamp suspension; the standing clamp includes a base 61, through which the specimen is clamped near the bracket 1 for combustion testing.

[0043] It should be noted that the bracket 1 is fixedly placed inside the combustion chamber. When conducting different types of combustion tests, the appropriate clamps should be selected. If a suspended clamp is selected, the test is conducted by suspending it on the bracket 1. If a stand-type clamp is selected, it is not necessary to suspend it, and the test is conducted directly on the whole unit near the bracket 1.

[0044] In this embodiment, as Figure 2 As shown, the bracket 1 is composed of several vertical rods and several horizontal beams that are fixedly connected. The fixed connection is made by bolt assembly. In this embodiment, there are a first horizontal beam 11, a second horizontal beam 12 and a third horizontal beam 13. In the horizontal direction, the length of the third horizontal beam 13 is less than that of the first horizontal beam 11 and the second horizontal beam 12. Only a small part of the clamps can be used in the third horizontal beam 13, so it does not need to be too long, thus saving material costs.

[0045] Horizontally, the spacing of the vertical bars is adapted to the size of the combustion chamber and the size and position of the Bunsen burner; vertically, the spacing of the first crossbeam 11 and the second crossbeam 12, and the spacing of the second crossbeam 12 and the third crossbeam 13 are adapted to the clamping assembly. Specifically, the spacing of the first angle clamping suspension assembly is used to determine the spacing of the first crossbeam 11 and the second crossbeam 12; the spacing of the second angle clamping suspension assembly is used to determine the spacing of the second crossbeam 12 and the third crossbeam 13; the spacing of the first crossbeam 11 and the second crossbeam 12 is used to determine the spacing of the second angle clamping suspension assembly; and the spacing of the second crossbeam 12 and the third crossbeam 13 is used to determine the height of the upright clamping base 61, so that after the crossbeam of the bracket 1 is fixed, it can be adapted to the suspension clamps of various angles, realizing quick suspension, removal and switching operations. In this embodiment, the distance between the first crossbeam 11 and the second crossbeam 12 is 100mm, and the distance between the second crossbeam 12 and the third crossbeam 13 is 315mm. This distance is determined so that it can accommodate multiple angle clamps at the same time, while ensuring the overall stability of the bracket 1.

[0046] It should be noted that the first angle clamp, the second angle clamp, and the third angle clamp are respectively the vertical clamp 3, the horizontal clamp 4, and the 60-degree clamp 5; the upright clamp includes the 45-degree clamp 6.

[0047] In this embodiment, as Figure 1 and Figure 2 As shown, the vertical clamp 3 includes a π-shaped sample clamping part 31 and a first suspension assembly fixedly connected to both sides of the sample clamping part.

[0048] Specifically, the π-shaped sample clamping part 31 consists of two identical π-shaped parts connected by a spring structure. The sample is placed in the gap 32 between the two π-shaped parts with the lower end of the sample aligned with the lower edge of the π-shaped part, and a combustion test is conducted through a Bunsen lamp located below it.

[0049] The first suspension assembly includes a left hook 33 fixedly connected to the left side of the π-shaped sample clamping part 31 and a right hook 34 fixedly connected to the right side. They are weldable, have identical structures, and each has a first irregular hole 35 and a second irregular hole 36. In use, the two second irregular holes 36 are aligned with the second crossbeam 12, and the two first irregular holes 35 are pushed into the first crossbeam 11. The entire clamp hangs on the crossbeam as the weight moves downwards. Simultaneously, the openings of the first irregular holes 35 have chamfers to fit the crossbeam, allowing them to easily engage with the first crossbeam 11, making the suspension more stable. The design of the irregular holes is ergonomic and adapts to the crossbeam structure, enabling operators to quickly and easily suspend the clamp stably on the bracket 1. The dimensions of the clamping part of each clamp are determined by the relative position of the sample to the Bunsen lamp after it is mounted on the clamp and hung on the corresponding crossbeam.

[0050] The crossbeam has vertical positioning marks corresponding to the irregular holes. These marks are used to position the vertical clamp, ensuring accurate positioning while quickly suspending the clamp.

[0051] When conducting a vertical combustion test, the distance between the Bunsen lamp inlet and the bottom of the specimen is specified to be 19.1 mm. Therefore, the dimensions of the π-shaped specimen clamping part 31 and the position of the gap 32 between the two π-shaped parts are adapted to the specified distance. This allows the specimen to be placed between the gaps 32 of the π-shaped parts after the vertical clamp 3 is suspended, with the specimen aligned with the lower edge of the π-shaped parts. This directly meets the distance requirement and does not require secondary adjustment, thus improving the tooling installation speed and positioning accuracy.

[0052] The dimensions of the vertical clamp must meet the requirement of an exposed area of ​​51mm*305mm. It is recommended that the size of the vertical combustion test specimen be at least 76mm*305mm, and the spacing of the π-shaped gap 32 should be determined within this range. In this embodiment, the dimensions of the vertical clamp 3 are 102mm*330mm. This size range can accommodate a variety of vertical test specimens, providing them with a stable, secure, and size-matched specimen placement platform.

[0053] In this embodiment, as Figure 3 and Figure 4 As shown, the horizontal clamp 4 includes a sample placement platform and a second suspension assembly fixedly connected to both sides of the sample placement platform; the second suspension assembly is used to suspend the clamp on the first crossbeam 11 and the second crossbeam 12.

[0054] Specifically, the sample placement platform consists of a first clamping plate 41 and a second clamping plate 42 with identical structures, used overlapping each other, with the sample placed in the middle. The first clamping plate 41 is located below the second clamping plate 42. The second suspension assembly includes a first hook plate 43 and a second hook plate 44, wherein one end of the first clamping plate 41 is fixedly connected to the first hook plate 43 and the other end is fixedly connected to the second hook plate 44. In this embodiment, the first clamping plate 41 is fixedly connected to the second hook plate 44 by bolts. The horizontal clamp 4 also includes an L-shaped positioning member 45, which is fixedly connected to the first hook plate 43 and is used to position the second clamping plate 42 so that the second clamping plate 42 can be quickly aligned and overlapped when it is moved above the first clamping plate 41.

[0055] Hook plate 1 43 has irregular holes 46 and 47, and hook plate 2 44 has an irregular hole 48. In use, irregular holes 46 and 48 are first suspended on the first crossbeam 11 and the second crossbeam 12 respectively, and then irregular hole 47 is pushed onto the second crossbeam 12. At the same time, the lower end of the opening of irregular hole 47 has a chamfer, which matches the crossbeam and can easily lock the second crossbeam 12, making the suspension more stable. The design of the three irregular holes is ergonomic and matches the structure of the crossbeam, which can meet the operator's needs to quickly and easily suspend the clamp stably on the bracket 1.

[0056] The crossbeam has horizontal positioning marks corresponding to the irregular holes. The horizontal positioning marks are used to position the horizontal clamp 4, ensuring accurate positioning while quickly suspending the clamp.

[0057] When conducting a horizontal combustion test, the distance between the Bunsen lamp tip and the bottom of the specimen is specified to be 19.1 mm. Therefore, the heights of hook one and hook two, and the thickness of the clamping plates are adapted to the above-mentioned specified distances. This allows the specimen to be placed between the two clamping plates after the horizontal clamp 4 is suspended, with the specimen aligned with the right edge of the clamping plates. Due to the setting of the suspension position and distance, the specimen can be directly aligned with the lower Bunsen lamp tip and the distance requirement can be met without secondary adjustment. This also improves the installation speed and positioning accuracy of the tooling.

[0058] The dimensions of the horizontal clamp must meet the requirement of an exposed area of ​​51mm*305mm. It is recommended that the size of the horizontal combustion test specimen be at least 76mm*305mm, and the size of the clamping plate should be determined within this range. In this embodiment, the dimensions of the horizontal clamp 4 are 102mm*330mm. This size range allows for the adaptation to various horizontal combustion test specimens, improving versatility.

[0059] In this embodiment, as Figure 5 , Figure 6 and Figure 7 As shown, the 60-degree clamp 5 includes an upper hook 51, a lower hook 52, a diagonal bar 53, and a sample clamping structure located on the same vertical plane; the diagonal bar 53 is fixedly installed between the upper hook 51 and the lower hook 52, forming a 60-degree angle with the horizontal plane; the sample clamping structure includes a first clamping part 54 and a second clamping part 55, wherein the first clamping part 54 is fixedly installed on the upper hook 51, and the second clamping part 55 is fixedly installed on the lower hook 52; the second clamping part 55 has a rotating component for clamping the linear sample 56, specifically various thicknesses of wires and cables, by means of a knob tightening.

[0060] Specifically, the upper hook 51 has two irregular holes. The upper irregular hole is consistent with the first irregular hole 35, and the lower fourth irregular hole 57 is consistent with the second irregular hole 36. The lower hook 52 has an irregular hole consistent with the second irregular hole 36. The 60-degree clamp is more complex than the vertical and horizontal clamps 4. The structure of the fourth irregular hole 57 is more suitable for the 60-degree clamp suspension. The difference is the suspension position. The upper hook 51 is suspended on the first crossbeam 11 and the second crossbeam 12, and the lower hook 52 is suspended on the third crossbeam 13, which improves the speed of suspension.

[0061] The crossbeam has 60-degree positioning marks at the positions corresponding to the irregular holes. These marks are used to position the 60-degree clamps, ensuring accurate positioning while quickly suspending the load.

[0062] When conducting a 60-degree combustion test, the Bunsen burner is placed perpendicular to the sample, with the tube opening 25.4 mm away from the sample. Therefore, the positions of the first clamping part 54 and the second clamping part 55 on the upper and lower hook parts 52 are adapted to the above-mentioned specified distance. This allows the distance requirement to be met directly when the sample is placed between the two clamping parts after the 60-degree clamp is suspended, without the need for secondary adjustment. This also improves the tooling installation speed and positioning accuracy.

[0063] The recommended specimen size for the 60-degree combustion test is at least 762 mm in length, and the size of the diagonal bar 53 is determined within this range. In this embodiment, the diagonal bar 53 is 300 mm in length. This size range can accommodate various linear specimens 56, improving versatility.

[0064] In this embodiment, as Figure 7 As shown, the upright 45-degree clamp 6 includes a base 61, a rotating and moving mechanism 62 fixedly installed on the base 61, and a sample placement frame 63 welded at a 45-degree angle to the rotating and moving mechanism 62; the rotating and moving mechanism 62 is used to rotate 360 ​​degrees and move the sample placement frame 63 up and down.

[0065] Specifically, the fixture dimensions for the 45-degree combustion test must meet the requirement of 254mm*254mm. During the 45-degree combustion test, the distance between the Bunsen burner nozzle and the bottom surface of the sample is specified as 25.4mm. Therefore, the height of the base 61, the thickness of the clamping plate, and the size of the sample placement frame 63 are adapted to the aforementioned distance. The 45-degree fixture, supported by the base 61, does not require additional suspension on the bracket 1. Placing the entire test fixture in the designated position inside the housing directly meets the distance requirement to the Bunsen burner nozzle, eliminating the need for secondary adjustments and improving the installation speed and positioning accuracy. The rotating and moving mechanism 62 enables 360-degree rotation and vertical movement of the sample placement frame 63, ensuring convenient installation according to the shape and size of the specimen while meeting the test angle requirements and facilitating adjustment.

[0066] The crossbeam has 45-degree positioning marks at corresponding positions. The fixture is positioned using the 45-degree positioning marks and aligned with the base 61 to ensure accurate positioning.

[0067] like Figure 8 As shown, this invention, based on an angle clamping adjuster for combustion testing, also provides an angle clamping adjustment method for combustion testing, including:

[0068] Step 1: Determine the distance between the first and second crossbeams using the spacing of the clamp suspension assemblies with a first angle; determine the distance between the second and third crossbeams using the spacing of the clamp suspension assemblies with a second angle; the spacing of the clamp suspension assemblies with a third angle is determined based on the distance between the first and second crossbeams.

[0069] Specifically, in step one, the distance between the second and third crossbeams is determined by the spacing of the clamp suspension components with the second angle; the length of the 60-degree clamp's diagonal rod is determined by the length of the sample held by the 60-degree clamp; the distance between the upper and lower hook components is determined by the length of the diagonal rod; and the distance between the second and third crossbeams is determined by the distance between the upper and lower hook components. The clamp with the fourth angle is a vertical clamp, including a base, a rotating and moving mechanism fixedly mounted on the base, and a sample placement frame welded at a 45-degree angle to the rotating and moving mechanism; the height of the rotating and moving mechanism is determined based on the distance between the second crossbeam and the horizontal plane.

[0070] Step 2: When conducting the combustion test, select different angle clamps according to different combustion test types. The structural design of this scheme can minimize the burning of the clamps within the test time that meets the test requirements, and only burn the test piece, ensuring that the clamping force meets the requirements within the test time and will not loosen. This greatly improves the stability of the clamping force, avoids slight changes in the clamp angle, and reduces test errors.

[0071] Step 3: When the fixture is a suspended fixture, suspend the selected fixture on the corresponding beam assembly through its suspension components; the specific suspension method has been described in detail in the fixture structure above, and will not be repeated here.

[0072] When the fixture is a vertical fixture, the selected fixture is placed next to the corresponding crossbeam assembly via the base, and the test is carried out directly.

[0073] Step 4: After suspension, position the device according to the set positioning standards; after positioning, conduct the corresponding combustion test;

[0074] Specifically, the positioning standard is a positioning mark line. Vertical, horizontal, 60-degree and 45-degree positioning mark lines are set on the crossbeam. Aligning the hook with the positioning mark line and suspending it can simultaneously improve the suspension speed and positioning accuracy.

[0075] Step 5: After the combustion test is completed, remove the suspension clamp from the crossbeam assembly, suspend another suspension clamp on the corresponding crossbeam assembly through its suspension assembly, and repeat Step 4.

[0076] After the combustion test is completed, the upright fixture is moved away from the support by the base as a whole.

[0077] In conventional combustion tests, each angle of the clamp is used to test different test specimens, and the tests are independent. The sufficiency of combustion is not significantly affected by the adjustment of the clamp. However, if multiple angles need to be tested for the same test specimen during combustion, the time spent adjusting the clamp angle using existing technology wastes combustion heat. From ignition to completion of combustion, the heat generated by combustion and the spread of combustion change over time. Conventional testing equipment requires pre-setting of angle adjustments, and each test can only measure one angle state. If multiple angle changes are forcibly made during combustion, the time spent on angle adjustment will result in insufficient combustion impact. In contrast, the suspension component of this solution can quickly adjust the angle state, greatly reducing the adjustment time from the original 30-80 minutes to less than 10 seconds, without affecting the changes in combustion conditions. It can more realistically simulate the impact of actual combustion on the test specimen, and the test results are more accurate.

[0078] Compared with existing technologies, this invention determines the spacing of the support beam by using the interlocking rings between the clamping components and the suspension components. This allows the support beam to be adapted to clamps of various angles after it is fixed, satisfying the use of clamps at various angles and enabling rapid switching between clamps of different angles, greatly reducing the switching time of clamping fixtures. At the same time, the clamps are divided into suspended and upright clamps. Suspended clamps are tested by directly suspending or removing them, while upright clamps are directly connected to the base and do not need to be suspended on the support. This method is adopted for clamps with high complexity, and it can be easily switched with suspended clamps, further ensuring the speed and efficiency of combustion testing.

[0079] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics of the solutions are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. An angle clamping adjuster for combustion testing, characterized in that, The device includes a support frame and a clamping assembly. The support frame includes a first crossbeam, a second crossbeam, and a third crossbeam that are fixedly installed. The clamping assembly includes a pedestal clamp and a suspension clamp. The suspension clamp includes a first angle clamp, a second angle clamp, and a third angle clamp with different suspension components. The different suspension components are used to cooperate with different crossbeam combinations for clamp suspension. The pedestal clamp includes a base through which the specimen is clamped for combustion testing near the support frame. The spacing of the first angle clamp suspension components determines the spacing between the first and second crossbeams. The spacing between the first and second crossbeams determines the spacing of the second angle clamp suspension components. The spacing of the third angle clamp suspension components determines the spacing between the second and third crossbeams. The spacing between the second and third crossbeams determines the height of the pedestal clamp base. The crossbeam of the bracket is fixedly connected and does not require adjustment. It can be adapted to clamps of various angles to meet the needs of hanging clamps of various angles and realize quick switching between clamps of different angles. Suspended fixtures are tested by directly suspending or removing them; upright fixtures are tested by moving the entire fixture along its base. The first angle clamp is a vertical clamp; the vertical clamp includes a π-shaped sample holding part and a first suspension assembly fixedly connected to both sides of the sample holding part; the first suspension assembly includes a plurality of irregular holes for suspending the vertical clamp on the first crossbeam and the second crossbeam. The second angle clamp is a horizontal clamp; the horizontal clamp includes a sample placement platform and a second suspension assembly fixedly connected to both sides of the sample placement platform; the second suspension assembly includes several irregular holes for suspending the horizontal clamp on the first crossbeam and the second crossbeam; The third angle clamp is a 60-degree clamp; the 60-degree clamp includes an upper hook, a lower hook, an inclined rod, and a sample clamping structure located on the same vertical plane; the inclined rod is fixedly installed between the upper hook and the lower hook, at a 60-degree angle to the horizontal plane; the upper hook is suspended on the first and second crossbeams, while the lower hook is suspended on the third crossbeam, for suspending the 60-degree clamp on the bracket; The upright fixture includes a 45-degree fixture; the 45-degree fixture includes a base, a rotating and moving mechanism fixedly installed on the base, and a sample placement frame welded at a 45-degree angle to the rotating and moving mechanism; the rotating and moving mechanism is used to rotate the sample placement frame 360 ​​degrees and move it up and down.

2. The angle clamping adjuster for combustion testing according to claim 1, characterized in that, The sample clamping structure includes a first clamping part and a second clamping part, wherein the first clamping part is fixedly installed on the upper hook and the second clamping part is fixedly installed on the lower hook; the second clamping part has a rotating part for clamping the sample by pressing with a knob.

3. An angle clamping adjustment method for combustion tests, characterized in that, The method, using the angle clamping adjuster for combustion testing as described in any one of claims 1-2, comprises: Step 1: Determine the distance between the first and second crossbeams using the spacing of the clamp suspension assemblies with a first angle; determine the distance between the second and third crossbeams using the spacing of the clamp suspension assemblies with a second angle; the spacing of the clamp suspension assemblies with a third angle is determined based on the distance between the first and second crossbeams. Step 2: When conducting a combustion test, select clamps with different angles according to different types of combustion tests; Step 3: When the fixture is a suspended fixture, suspend the selected fixture on the corresponding beam assembly through its suspension components; Step 4: After suspension, position the device according to the set positioning standards; after positioning, conduct the corresponding combustion test; Step 5: After the combustion test is completed, remove the clamp from the crossbeam assembly, suspend another suspension clamp on the corresponding crossbeam assembly through its suspension assembly, and repeat Step 4.

4. The angle clamping and adjustment method for combustion testing according to claim 3, characterized in that, In step one, the distance between the second and third crossbeams is determined by the spacing of the clamp suspension assembly with the second angle; the length of the 60-degree clamping sample is determined by the length of the 60-degree clamping sample; the distance between the upper and lower hooks is determined by the length of the hook; and the distance between the second and third crossbeams is determined by the distance between the upper and lower hooks.

5. The angle clamping and adjustment method for combustion testing according to claim 3, characterized in that, Step one also includes that the fixture with the fourth angle is a stand-type fixture, including a base, a rotating and moving mechanism fixedly installed on the base, and a sample placement frame welded to the rotating and moving mechanism at a 45-degree angle; the height of the rotating and moving mechanism is determined according to the distance between the second crossbeam and the horizontal plane. Step three also includes, when the fixture is a stand-up fixture, placing the selected fixture next to the corresponding beam assembly via the base; Step five also includes removing the entire upright fixture after the combustion test is completed.

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