A heat-insulating and fire-proof aluminum alloy door and window strength detection device and method

Abstract

The invention relates to the technical field of door and window detection, and in particular to a heat-insulating fireproof aluminum alloy door and window strength detection device and method, comprising: a wind pressure module: comprising a pressure generator and a sealed chamber, used for simulating wind pressure to test the wind pressure resistance performance of doors and windows; an impact module: comprising an impact hammer and a test platform, used for testing the impact resistance performance of doors and windows; a heat-insulating fire-resistant module: comprising a temperature control chamber and a high-temperature furnace, used for testing the heat-insulating performance and fire-resistant performance of doors and windows; a measuring module: comprising an infrared thermometer and an accelerometer, used for measuring the surface temperature of doors and windows and the degree of deformation of doors and windows; a data processing and judgment module: used for processing data measured by the measuring module, calculating the scores of various performances and the total strength score S, and judging whether the strength of doors and windows meets the standard according to the preset standard strength σ and the total strength score S; the invention can comprehensively judge the strength of a door and window by orderly detecting the door and window in an orderly manner, thereby effectively improving the accuracy of the strength detection of doors and windows.

Description

Technical Field

[0001] The present invention relates to the technical field of door and window detection, and in particular to a device and method for detecting the strength of a heat-insulating and fire-proof aluminum alloy door and window. Background Art

[0002] With the acceleration of urbanization and the increasing requirements of the construction industry for safety and energy saving, modern buildings have put forward more stringent requirements for the selection of door and window materials. Especially for high-rise buildings, doors and windows must not only have good thermal insulation performance to reduce energy consumption, but also have excellent fire protection functions, sufficient strength and integrity to protect the lives and property of residents.

[0003] Most of the door and window strength testing equipment on the market can only test a single aspect of performance, such as wind pressure resistance or fire resistance, but lack an integrated testing system that can test a piece of aluminum alloy door and window in multiple aspects such as wind pressure, impact, thermal insulation and fire resistance in an orderly manner, and make a comprehensive evaluation based on the test results. In addition, the existing testing methods often use qualitative descriptions rather than quantitative analysis, resulting in inaccurate test results that are difficult to meet the high standards of modern buildings; more importantly, the existing technology lacks consideration of the uniformity of the surface temperature distribution of doors and windows during the test process, which may lead to misjudgment of the thermal insulation performance of doors and windows in actual applications.

[0004] Therefore, it is necessary to design a new detection device and method to overcome the above-mentioned shortcomings and achieve a more comprehensive and accurate evaluation of the strength of aluminum alloy doors and windows. Summary of the invention

[0005] In view of at least one of the above technical problems, the present invention provides a device and method for detecting the strength of heat-insulating and fire-proof aluminum alloy doors and windows, which improves the accuracy of strength detection of aluminum alloy doors and windows by sequentially performing multiple tests on a single door and window and comprehensively judging the results.

[0006] According to a first aspect of the present invention, there is provided a heat-insulating fireproof aluminum alloy door and window strength detection device, comprising:

[0007] Wind pressure module: includes a pressure generator and a sealed chamber, used to simulate wind pressure to test the wind pressure resistance of doors and windows;

[0008] Impact module: includes an impact hammer and a test platform, used to test the impact resistance of doors and windows;

[0009] Thermal insulation and fire resistance module: including temperature control room and high temperature furnace, used to test the thermal insulation and fire resistance of doors and windows;

[0010] Measuring module: including infrared thermometer and accelerometer, used to measure the temperature of the door and window surface and the degree of deformation of the door and window;

[0011] Data processing and judgment module: used to process the data measured by the measurement module, calculate the scores of various performances and the total strength score S, and judge whether the strength of doors and windows meets the standard based on the preset standard strength σ and the total strength score S.

[0012] Furthermore, the accelerometer is installed on the side of the door or window that is not directly subjected to pressure and impact.

[0013] Furthermore, the impact hammer can provide impact energy of different weights and speeds; the thermal insulation and fire-resistant module also includes a thermal imager for real-time monitoring of the temperature distribution of doors and windows under high temperature conditions.

[0014] According to a second aspect of the present invention, there is also provided a method for testing the strength of heat-insulating and fire-resistant aluminum alloy doors and windows, comprising the following steps:

[0015] S10: Set the maximum allowable deformation La, the maximum allowable temperature difference Ta, the minimum fire resistance time tm, and the maximum allowable deformation Fa; set the maximum wind pressure level, impact energy, temperature range, and standard strength σ; prepare a door and window to be tested;

[0016] S20: The doors and windows to be tested are first subjected to a wind pressure resistance test. The doors and windows to be tested are fixed in a sealed room. After the room is completely sealed, a wind pressure generator is used to generate wind pressure. The wind pressure level is gradually increased. When the highest wind pressure level is reached, the deformation ΔL of the doors and windows is recorded and the wind pressure resistance score S1 is calculated based on the deformation ΔL. The wind pressure resistance test ends after the recording is completed.

[0017] S30: The doors and windows to be tested are subjected to an impact test again. The doors and windows to be tested are fixed on the test platform, the impact energy of the impact hammer is set, the doors and windows are impacted by the impact hammer, and the deformation ΔF of the doors and windows is recorded; the impact resistance score S2 is calculated according to the deformation ΔF and the wind pressure resistance score S1; after the recording is completed, the impact resistance test is terminated, and the doors and windows are waited for a period of time to recover;

[0018] S40: Then the doors and windows to be tested are subjected to a thermal insulation performance test, and the doors and windows to be tested are fixed in a temperature-controlled room; the indoor temperature is gradually increased, and the temperature changes of the inner and outer surfaces of the doors and windows are monitored by an infrared thermometer. After a certain period of time, the temperature difference ΔT between the inner and outer surfaces of the doors and windows is calculated; at the same time, a thermal imager is used to detect the temperature distribution of the doors and windows to determine its distribution uniformity; the thermal insulation score S3 is calculated based on the temperature difference ΔT and the distribution uniformity;

[0019] S50: Fix the doors and windows to be tested in a high-temperature furnace to heat them. Start timing after heating to a preset temperature. Stop timing when the doors and windows are obviously deformed, melted or burned. The fire resistance time t is obtained after the timing is stopped. Calculate the fire resistance score S4 according to the fire resistance time t and the thermal insulation score S3.

[0020] S60: Set 4 weight coefficients W1, W2, W3 and W4, and W1+W2+W3+W4=1; calculate the total strength score S through S=W1·S1+W2·S2+W3·S3+W4·S4; when S≥σ, the strength is judged to be qualified; when S<σ, the strength is judged to be unqualified.

[0021] Furthermore, in step S20, the wind pressure resistance score S1 is specifically calculated as follows:

[0022] When 0≤ΔL≤0.8·La, let S1=1; when 0.8·La<ΔL≤La, let S1=0.8; when La<ΔL, let S1=0;

[0023] In step S30, the impact resistance score S2 is specifically calculated as follows:

[0024] When 0≤ΔF≤0.8·Fa, let Sj2=1; when 0.8·Fa<ΔF≤Fa, let Sj2=0.8; when Fa<ΔF, let Sj2=0;

[0025] Calculate S2=Sj2·(1+ΔL / La).

[0026] Further, in step S40, the specific method of calculating the thermal insulation score S3 according to the temperature difference ΔT and the distribution uniformity is:

[0027] The temperature difference ΔT = Tn-Tw is scored as Sw; where Tn is the inner surface temperature of the door and window, and Tw is the outer surface temperature of the door and window; the distribution uniformity score is Sf;

[0028] When 0≤ΔT≤0.8·Ta, let Sw=1; when 0.8·Ta<ΔT≤Ta, let Sw=0.8; when Ta<ΔT, let Sw=0;

[0029] When the distribution is very uniform, let Sf = 1; when the distribution is uniform, let Sf = 0.8; when the distribution is uneven, let Sf = 0;

[0030] Then calculate S3=(Sw+Sf) / 2.

[0031] Further, in step S50, the fire resistance score S4 is calculated according to the fire resistance time t and the insulation score S3 in the following specific manner:

[0032] When 1.2·tm≤t, let Sj4=1; when tm≤t<1.2·tm, let Sj4=0.8; when t<tm, let Sj4=0;

[0033] Calculate S4=Sj4·(1+ΔT / Ta).

[0034] Furthermore, test corrections are also included:

[0035] From the same batch of doors and windows to be tested, three doors and windows are randomly selected and recorded as the first door and window, the second door and window, and the third door and window; the first door and window are individually tested for impact resistance and the score Sc is calculated, the second door and window are individually tested for thermal insulation and the score Sr is calculated, and the third door and window are individually tested for fire resistance and the score Sn is calculated.

[0036] Furthermore, it also includes: when the first door and window is tested for impact resistance, two of the four corners of the door and window and the center point of the door and window are randomly selected for testing using an impact hammer, and scores are calculated for the three locations, and then the average of the three scores is taken to obtain Sc.

[0037] Furthermore, it also includes:

[0038] Calculate S2z = 0.4·S2 + 0.6·Sc, set S2 = S2z, update the value of S2 and bring it into the subsequent calculation of the total strength score S;

[0039] Calculate S3z = 0.4·S3 + 0.6·Sr, set S3 = S2z, update the value of S3 and bring it into the subsequent calculation of the total strength score S;

[0040] Calculate S4z=0.4·S4+0.6·Sn, set S4=S4z, update the value of S4 and bring it into the subsequent calculation of the total intensity score S.

[0041] The beneficial effects of the present invention are as follows: the present invention sequentially performs four performance tests on a door and window to be tested, and comprehensively judges whether the strength of the door and window is qualified based on the scores of the four performance tests; when calculating the scores of each performance, the accuracy of each test is improved by adding the influence of the previous test on the subsequent test to the score calculation of the next test; the scores are corrected by separately testing three selected doors and windows to reduce the influence of randomness on the test; and the accuracy of the door and window strength test is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 Schematic diagram of the structure of the heat-insulating and fire-proof aluminum alloy door and window strength detection device in an embodiment of the present invention;

[0044] Figure 2 Schematic diagram of the steps of the method for testing the strength of heat-insulating and fire-resistant aluminum alloy doors and windows in an embodiment of the present invention. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0046] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0048] like Figure 1 As shown, a heat-insulating fireproof aluminum alloy door and window strength detection device comprises:

[0049] Wind pressure module: including a pressure generator and a sealed chamber. The doors and windows to be tested are fixed in the sealed chamber with one side facing the inside of the sealed chamber. The pressure generator in the sealed chamber is used to simulate wind pressure. The pressure in the sealed chamber is continuously increased to test the wind pressure resistance performance of the doors and windows.

[0050] Impact module: includes an impact hammer and a test platform, used to test the impact resistance of doors and windows;

[0051] Thermal insulation and fire resistance module: including temperature control room and high temperature furnace, used to test the thermal insulation and fire resistance of doors and windows;

[0052] Measuring module: including infrared thermometer and accelerometer. The infrared thermometer is used to measure the temperature of two surfaces of doors and windows. One surface is facing the heating source inside the temperature control room after the doors and windows are fixed in the temperature control room, and the other surface is facing the outside. The accelerometer is used to measure the deformation degree of the doors and windows.

[0053] Data processing and judgment module: used to process the data measured by the measurement module, calculate the scores of various performances and the total strength score S, and judge whether the strength of doors and windows meets the standard based on the preset standard strength σ and the total strength score S.

[0054] Preferably, the accelerometer is installed on the side of the door and window that is not directly subjected to pressure and impact. This can prevent the accelerometer from being directly subjected to the pressure generated by the pressure generator and the impact force brought by the impact hammer, making it less likely to be damaged; and when the accelerometer is installed at the center point, the detection of the door and window is more accurate.

[0055] The impact hammer can provide impact energy of different weights and speeds, and the required impact force can be adjusted according to different models of doors and windows to complete the test; the thermal insulation and fire resistant module also includes a thermal imager for real-time monitoring of the temperature distribution of doors and windows under high temperature conditions, thereby improving the accuracy of the assessment of thermal insulation performance.

[0056] According to the second aspect of the present invention, a method for testing the strength of heat-insulating and fire-proof aluminum alloy doors and windows is also provided. Figure 2 As shown, the following steps are included:

[0057] S10: Set the maximum allowable deformation La, the maximum allowable temperature difference Ta, the minimum fire resistance time tm, and the maximum allowable deformation Fa; set the maximum wind pressure level, impact energy, temperature range, and standard strength σ; prepare a door and window to be tested;

[0058] S20: The doors and windows to be tested are first subjected to a wind pressure resistance test. The doors and windows to be tested are fixed in a sealed room. After the doors and windows to be tested are completely sealed, a wind pressure generator is used to generate wind pressure, and a pressure is generated on the entire surface of the doors and windows to be tested to simulate wind pressure. The wind pressure level is gradually increased. After the highest wind pressure level is reached, the deformation ΔL of the entire surface of the doors and windows is recorded and the wind pressure resistance score S1 is calculated based on the deformation ΔL. The wind pressure resistance test ends after the recording is completed;

[0059] S30: The doors and windows to be tested are subjected to impact resistance test again. The doors and windows to be tested are fixed on the test platform, the impact energy of the impact hammer is set, and the doors and windows are impacted with the impact hammer so that the maximum deformation is generated at the point where the impact hammer contacts the doors and windows, and the deformation ΔF of the doors and windows is recorded; the impact resistance score S2 is calculated based on the deformation ΔF and the wind pressure resistance score S1, because during the wind pressure resistance test, pressure is generated on the entire surface of the doors and windows to be tested, which will have a certain impact on the impact resistance test, so that the impact resistance score S2 will be slightly reduced, so the wind pressure resistance score S1 needs to be taken into account when calculating the impact resistance score S2; after recording, the impact resistance test ends, and the doors and windows are waited for a period of time to recover;

[0060] S40: Then the doors and windows to be tested are subjected to a thermal insulation performance test, and the doors and windows to be tested are fixed in a temperature-controlled room; the indoor temperature is gradually increased, and the temperature changes of the inner and outer surfaces of the doors and windows are monitored by an infrared thermometer. After a certain period of time, the temperature difference ΔT between the inner and outer surfaces of the doors and windows is calculated; at the same time, a thermal imager is used to detect the temperature distribution of the doors and windows to determine its distribution uniformity; the thermal insulation score S3 is calculated based on the temperature difference ΔT and the distribution uniformity;

[0061] S50: Fix the doors and windows to be tested in a high-temperature furnace to heat them. After the doors and windows are heated to a preset temperature, they will enter a thermally stable state. In this state, the temperature distribution of each part of the doors and windows tends to be uniform, eliminating the interference factors caused by the uneven temperature in the initial heating period. Starting the timing at this time can more accurately evaluate the fire resistance performance of the doors and windows at high temperatures; when the doors and windows show obvious deformation, melting or burning, the timing is stopped, and the fire resistance time t is obtained; the fire resistance score S4 is calculated based on the fire resistance time t and the thermal insulation score S3;

[0062] S60: Set 4 weight coefficients W1, W2, W3 and W4, and W1+W2+W3+W4=1; calculate the total strength score S through S=W1·S1+W2·S2+W3·S3+W4·S4; when S≥σ, the strength is judged to be qualified; when S<σ, the strength is judged to be unqualified.

[0063] In step S20, the wind pressure resistance score S1 is specifically calculated as follows:

[0064] When 0≤ΔL≤0.8·La, let S1=1; when 0.8·La<ΔL≤La, let S1=0.8; when La<ΔL, let S1=0;

[0065] In step S30, the impact resistance score S2 is specifically calculated as follows:

[0066] When 0≤ΔF≤0.8·Fa, let Sj2=1; when 0.8·Fa<ΔF≤Fa, let Sj2=0.8; when Fa<ΔF, let Sj2=0;

[0067] Calculate S2=Sj2·(1+ΔL / La); when calculating the impact resistance score S2, first get the basic score Sj2 by comparing it with the set value, then divide the deformation ΔL obtained during the wind pressure test by the maximum allowable deformation La, and add it into the final calculation of the impact resistance score S2 as compensation; because the wind pressure test will have an impact on doors and windows, reducing the expected impact resistance score.

[0068] In step S40, the specific method of calculating the thermal insulation score S3 according to the temperature difference ΔT and the distribution uniformity is:

[0069] The temperature difference ΔT = Tn-Tw is scored as Sw; Tn is the inner surface temperature of the door and window, and Tw is the outer surface temperature of the door and window; the inner surface of the door and window is directly heated in the temperature control room, and then the heat is transferred to the outer surface of the door and window, so the inner surface temperature of the door and window is higher than the outer surface temperature of the door and window, resulting in a temperature difference ΔT, which can reflect the thermal insulation performance of the door and window; the distribution uniformity score is Sf;

[0070] When 0≤ΔT≤0.8·Ta, let Sw=1; when 0.8·Ta<ΔT≤Ta, let Sw=0.8; when Ta<ΔT, let Sw=0;

[0071] When the distribution is very uniform, let Sf=1; when the distribution is uniform, let Sf=0.8; when the distribution is uneven, let Sf=0; there are many ways to judge whether the temperature distribution is uniform, and the standard deviation method and the average temperature gradient method can be used to obtain the distribution uniformity score Sf;

[0072] Then calculate S3=(Sw+Sf) / 2, and take the average of the temperature difference score Sw and the distribution uniformity score Sf to reflect it in the thermal insulation performance score. Both temperature difference and distribution uniformity occupy an important position, and it is more accurate to combine them to calculate the thermal insulation score S3.

[0073] In step S50, the fire resistance score S4 is calculated according to the fire resistance time t in the following specific manner:

[0074] When 1.2·tm≤t, let Sj4=1; when tm≤t<1.2·tm, let Sj4=0.8; when t<tm, let Sj4=0; firstly, by comparing with the set minimum fire resistance time tm, the basic score Sj4 is obtained; the comparison method here expresses that the longer the fire resistance time is and the more it exceeds the minimum fire resistance time tm, the better the fire resistance performance is;

[0075] Calculate S4=Sj4·(1+ΔT / Ta); Both the fire resistance performance test and the thermal insulation performance test are related to temperature, so the thermal insulation performance test conducted first has a certain impact on the fire resistance performance test. Therefore, by compensating the ratio of the temperature difference ΔT to the maximum allowable temperature difference Ta to the basic score Sj4, the fire resistance score S4 is increased, thereby reducing the impact of the thermal insulation performance test on the fire resistance performance test and improving the accuracy of the fire resistance performance test.

[0076] Preferably, test correction is also included:

[0077] From the same batch of doors and windows used to generate the doors and windows to be tested, on the basis of taking out the door and window samples used for the above-mentioned tests, 3 doors and windows are randomly selected, recorded as the first door and window, the second door and window, and the third door and window; the first door and window is subjected to an impact resistance test alone and the score Sc is calculated, the second door and window is subjected to a heat insulation test alone and the score Sr is calculated, and the third door and window is subjected to a fire resistance test alone and the score Sn is calculated; because the wind pressure resistance performance test performed on the doors and windows to be tested at the beginning is not affected by other performance tests, there is no need to select a door and window to perform a wind pressure resistance performance test alone; the other three tests have previous performance tests, which will have more or less influence, so test correction is required; test correction can reduce the impact of abnormal data that may be generated by a single door and window on the final result and reduce accidental errors by testing multiple doors and windows, and can also obtain more comprehensive performance data to make up for the error of a door and window to be tested after four tests, which is helpful to more comprehensively evaluate the overall quality of doors and windows.

[0078] Preferably, when the first door and window is subjected to an impact resistance test, two of the four corners of the door and window and the center point of the door and window are randomly selected for testing using an impact hammer, and three accelerometers are installed at these three positions corresponding to the side of the door and window that is not directly impacted for measuring the deformation, and scores are calculated for all three positions, and then the three scores are averaged to obtain Sc; such a test covers various key areas of the doors and windows, and is helpful to evaluate the impact resistance of the doors and windows at different positions, so as to have a more comprehensive understanding of the overall impact resistance of the doors and windows, making the final score Sc more reliable.

[0079] It also includes combining the scores of the three randomly selected doors and windows tested individually with the scores of the previously tested doors and windows:

[0080] Calculate S2z = 0.4·S2 + 0.6·Sc, set S2 = S2z, update the value of S2 and bring it into the subsequent calculation of the total strength score S;

[0081] Calculate S3z = 0.4·S3 + 0.6·Sr, set S3 = S2z, update the value of S3 and bring it into the subsequent calculation of the total strength score S;

[0082] Calculate S4z = 0.4·S4 + 0.6·Sn, set S4 = S4z, update the value of S4 and bring it into the subsequent calculation of the total strength score S;

[0083] By combining the scores of multiple independent tests with the scores of a door and window to be tested after four tests, the various performances of this batch of doors and windows can be comprehensively evaluated to reduce individual differences in doors and windows; since the individually tested doors and windows have only undergone one test, their scores are more accurate, so they account for a higher proportion (0.6) in the score of this performance test to ensure that the results of a single test can more truly reflect the performance of the doors and windows, while the scores of the doors and windows to be tested are affected by the other three tests, so they account for a smaller proportion (0.4) in the score of this performance test to appropriately reduce this influence; through such distribution, the accuracy of strength judgment of a batch of doors and windows can be improved, the total strength score S can be objectively calculated, and the quality of aluminum alloy doors and windows can be correctly detected.

[0084] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for testing the strength of heat-insulating and fire-proof aluminum alloy doors and windows, characterized in that: The following steps are involved: S10: Set the maximum allowable deformation La, the maximum allowable temperature difference Ta, the minimum fire resistance time tm, and the maximum allowable deformation Fa; Set the maximum wind pressure level, impact energy, temperature range and standard strength σ; prepare a door or window to be tested; S20: The doors and windows to be tested are first subjected to a wind pressure resistance test. The doors and windows to be tested are fixed in a sealed room. After the room is completely sealed, a wind pressure generator is used to generate wind pressure. The wind pressure level is gradually increased. When the highest wind pressure level is reached, the deformation ΔL of the doors and windows is recorded and the wind pressure resistance score S1 is calculated based on the deformation ΔL. The wind pressure resistance test ends after the recording is completed. S30: The doors and windows to be tested are subjected to an impact test again. The doors and windows to be tested are fixed on the test platform, the impact energy of the impact hammer is set, the doors and windows are impacted by the impact hammer, and the deformation ΔF of the doors and windows is recorded; the impact resistance score S2 is calculated according to the deformation ΔF and the wind pressure resistance score S1; after the recording is completed, the impact resistance test is terminated, and the doors and windows are waited for a period of time to recover; S40: Then the doors and windows to be tested are subjected to a thermal insulation performance test, and the doors and windows to be tested are fixed in a temperature-controlled room; Gradually increase the indoor temperature, and use an infrared thermometer to monitor the temperature changes on the inside and outside surfaces of doors and windows. After a certain period of time, calculate the temperature difference ΔT between the inside and outside surfaces of doors and windows. At the same time, use a thermal imager to detect the temperature distribution of doors and windows to determine its distribution uniformity. Calculate the insulation score S3 based on the temperature difference ΔT and distribution uniformity. S50: Fix the doors and windows to be tested in a high-temperature furnace to heat them. Start timing after heating to a preset temperature. Stop timing when the doors and windows are obviously deformed, melted or burned. The fire resistance time t is obtained after the timing is finished. Calculate the fire resistance score S4 according to the fire resistance time t. S60: Set 4 weight coefficients W1, W2, W3 and W4, and W1+W2+W3+W4=1; calculate the total strength score S through S=W1·S1+W2·S2+W3·S3+W4·S4; when S≥σ, the strength is judged to be qualified; when S<σ, the strength is judged to be unqualified.

2. The heat-insulating and fire-proof aluminum alloy door and window strength detection method according to claim 1 is characterized in that: In step S20, the wind pressure resistance score S1 is specifically calculated as follows: When 0≤ΔL≤0.8·La, let S1=1; when 0.8·La<ΔL≤La, let S1=0.8; when La<ΔL, let S1=0; In step S30, the specific calculation method of the impact resistance score S2 is: When 0≤ΔF≤0.8·Fa, let Sj2=1; when 0.8·Fa<ΔF≤Fa, let Sj2=0.8; when Fa<ΔF, let Sj2=0; where Sj2 is the basic score; Calculate S2=Sj2·(1+ΔL / La).

3. The heat-insulating and fire-proof aluminum alloy door and window strength detection method according to claim 1 is characterized in that: In step S40, the specific method of calculating the thermal insulation score S3 according to the temperature difference ΔT and the distribution uniformity is: The temperature difference ΔT = Tn-Tw is scored as Sw; where Tn is the inner surface temperature of the door and window, and Tw is the outer surface temperature of the door and window; the distribution uniformity score is Sf; When 0≤ΔT≤0.8·Ta, let Sw=1; when 0.8·Ta<ΔT≤Ta, let Sw=0.8; when Ta<ΔT, let Sw=0; When the distribution is very uniform, let Sf = 1; when the distribution is uniform, let Sf = 0.8; when the distribution is uneven, let Sf = 0; Then calculate S3=(Sw+Sf) / 2.

4. The heat-insulating and fire-proof aluminum alloy door and window strength detection method according to claim 1 is characterized in that: In step S50, the fire resistance score S4 is calculated according to the fire resistance time t in the following specific manner: When 1.2·tm≤t, let Sj4=1; when tm≤t<1.2·tm, let Sj4=0.8; when t<tm, let Sj4=0; where Sj4 is the basic score; Calculate S4=Sj4·(1+ΔT / Ta).

5. The heat-insulating and fire-proof aluminum alloy door and window strength testing method according to claim 1 is characterized in that: Also includes test corrections: From the same batch of doors and windows to be tested, three doors and windows are randomly selected and recorded as the first door and window, the second door and window, and the third door and window; the first door and window are individually tested for impact resistance and the score Sc is calculated, the second door and window are individually tested for thermal insulation and the score Sr is calculated, and the third door and window are individually tested for fire resistance and the score Sn is calculated.

6. The heat-insulating and fire-proof aluminum alloy door and window strength testing method according to claim 5 is characterized in that: Also includes: When the first door and window is tested for impact resistance, two of the four corners of the door and window and the center point of the door and window are randomly selected for testing using an impact hammer. Scores are calculated for all three locations, and then the average of the three scores is taken to obtain Sc.

7. The heat-insulating and fire-proof aluminum alloy door and window strength testing method according to claim 6 is characterized in that: Also includes: Calculate S2z = 0.4·S2 + 0.6·Sc, set S2 = S2z, update the value of S2 and bring it into the subsequent calculation of the total strength score S; Calculate S3z = 0.4·S3 + 0.6·Sr, set S3 = S2z, update the value of S3 and bring it into the subsequent calculation of the total strength score S; Calculate S4z=0.4·S4+0.6·Sn, set S4=S4z, update the value of S4 and bring it into the subsequent calculation of the total intensity score S.

8. The method for testing the strength of heat-insulating and fire-proof aluminum alloy doors and windows according to any one of claims 1 to 7, characterized in that: The following heat-insulating and fire-proof aluminum alloy door and window strength testing devices are used, including: Wind pressure module: includes a pressure generator and a sealed chamber, used to simulate wind pressure to test the wind pressure resistance of doors and windows; Impact module: includes an impact hammer and a test platform, used to test the impact resistance of doors and windows; Thermal insulation and fire resistance module: including temperature control room and high temperature furnace, used to test the thermal insulation and fire resistance of doors and windows; Measuring module: including infrared thermometer and accelerometer, used to measure the temperature of the door and window surface and the degree of deformation of the door and window; Data processing and judgment module: used to process the data measured by the measurement module, calculate the scores of various performances and the total strength score S, and judge whether the strength of doors and windows meets the standard based on the preset standard strength σ and the total strength score S.

9. The heat-insulating and fire-proof aluminum alloy door and window strength testing method according to claim 8 is characterized in that: In the heat-insulating and fire-proof aluminum alloy door and window strength detection device, the accelerometer is installed on the side of the door and window that is not directly subjected to pressure and impact.

10. The heat-insulating and fire-proof aluminum alloy door and window strength testing method according to claim 8, characterized in that: In the thermal insulation and fireproof aluminum alloy door and window strength detection device, the impact hammer can provide impact energy of different weights and speeds; the thermal insulation and fireproof module also includes a thermal imager for real-time monitoring of the temperature distribution of doors and windows under high temperature conditions.

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