A natural environment accelerated test device and test method

Abstract

The present invention provides a natural environment accelerated test device and a method for testing the onshore duty environment of ammunition products. The test chamber is rotatably connected to the support frame, and the test chamber is further connected to a telescopic mechanism for driving the test chamber to rotate. An articulated connection part is provided at the low point of the test chamber, and the telescopic rod of the telescopic mechanism is connected to the articulated connection part. The root of the telescopic rod and the articulated connection part are respectively located on both sides of the rotation axis of the test chamber. The steps of the test method include controlling the test chamber to be in one or more of a horizontal state, an inclined state, and a vertical state during a preset period. The present invention can truly, accurately, and quickly carry out the onshore duty environment adaptability test and verification of ammunition products.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental testing, and particularly relates to a natural environment accelerated test device for conducting onshore duty environmental tests on ammunition products and a method for onshore duty environmental tests of ammunition products. Background Art

[0002] An onshore duty natural environment accelerated test device (hereinafter referred to as the natural environment accelerated test device) is a natural acceleration test equipment that simulates the adaptability of ammunition products to the onshore duty environment and can be used to analyze information such as temperature stress borne by ammunition products under the onshore duty mission profile.

[0003] Currently, at home and abroad, black heat-absorbing coatings are usually sprayed on the surface of the test chamber to strengthen the effect of solar radiation heat. That is, the absorption capacity of solar radiation heat energy is increased through a closed black box to strengthen the solar radiation heat effect and the day-night temperature difference effect experienced by the products inside the box, and to accelerate the thermal aging rate of the products. For example, the composite solid propellant natural acceleration test device provided in Document CN105403474A has been successfully used to quickly evaluate the storage environment adaptability of material-level products such as composite solid propellants. However, for ammunition products, since a large number of ammunition products will be in a state of combat readiness duty for a long time, using this composite solid propellant natural acceleration test device can neither meet the requirements for conducting combat readiness duty tests on ammunition products nor verify the onshore duty environment adaptability of ammunition products.

[0004] More critically, the existing natural environment accelerated test devices are relatively large in volume and high in facility cost. When conducting onshore duty environmental tests on ammunition products, it is impossible to quickly and flexibly switch the onshore duty state of ammunition products and accurately control it within 1° using the existing natural environment accelerated test devices. Summary of the Invention

[0005] The purpose of the present invention is to provide a natural environment accelerated test device for conducting onshore duty environmental tests on ammunition products and a method for onshore duty environmental tests of ammunition products, which can at least solve the technical problem that the existing natural environment accelerated test devices cannot meet the requirements for conducting combat readiness duty tests on ammunition products.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions.

[0007] A natural environment accelerated test device, comprising a test chamber. The inner and outer walls of the test chamber are both sprayed with heat-absorbing coatings. The inner cavity of the test chamber is used to accommodate specimens. The test chamber is rotatably connected to a support frame, and the test chamber is also connected to a telescopic mechanism for driving the test chamber to rotate. An articulated part is provided at the low point of the test chamber, and the telescopic rod of the telescopic mechanism is connected to the articulated part. The root of the telescopic rod and the articulated part are respectively located on both sides of the rotation axis of the test chamber. When the telescopic rod retracts, the test chamber becomes inclined or vertical.

[0008] Further, to improve the flexibility of the natural environment accelerated test device during use, the articulated part includes a bearing seat provided at the bottom of the test chamber and a bearing fitted on the bearing seat. A rotating shaft installed on the bearing is connected to the telescopic rod of the telescopic mechanism.

[0009] Further, to reduce the volume of the natural environment accelerated test device, the test chamber adopts a non-full cylindrical structure. When the test chamber is in a horizontal state, the arc area of the test chamber faces downward, the flat area of the test chamber faces upward, and the cover plate of the test chamber is located in this flat area. The specimens installed in the inner cavity of the test chamber are arranged in the same axis direction as the test chamber, and the bottom ends of the specimens abut against the inner wall of end A of the test chamber.

[0010] Further, to improve the stability of the natural environment accelerated test device, the test chamber includes an outer shell, a skeleton, and an inner shell. The outer shell and the inner shell are fixedly connected to the skeleton. A sample rack and test fixtures are provided in the inner cavity of the test chamber, and the test fixtures adopt hoop assemblies.

[0011] Further, a ventilation hood is provided on the outer side wall of end B of the test chamber. End B is located on the opposite side of end A. The inner cavity of the ventilation hood is communicated with the inner cavity of the test chamber. A ventilation system is provided in the ventilation hood. The ventilation hood is arc-shaped, the arc part of the ventilation hood faces downward and the horizontal part faces upward, and the ventilation holes of the ventilation hood are located in the arc part.

[0012] Preferably, the telescopic mechanism adopts an electric push rod assembly, including a push rod component. The push rod component is connected to an explosion-proof motor. The explosion-proof motor adopts a servo explosion-proof motor. The explosion-proof motor is located in a cover body. A cover is provided on the upper part of the cover body. The cover body and the cover jointly enclose an open space for accommodating the explosion-proof motor and the push rod component. And in the working state, the push rod of the push rod component extends and retracts from the opening of the open space.

[0013] To further improve the stability of the natural environment accelerated test device, the support frame includes two triangular braces arranged side by side. The two triangular braces are simultaneously connected to the chassis. A connecting rod is provided inside the two triangular braces. One end of the connecting rod is connected to the triangular brace and the other end is connected to the chassis. An ear seat one is connected to the top of one triangular brace, and an ear seat two is connected to the top of the other triangular brace. An ear seat three is provided in the middle of the end beam of the chassis. Ear seat one and ear seat two are used for rotatably installing the test chamber, and ear seat three is used for rotatably installing the electric push rod assembly.

[0014] In the present invention, it further includes an angle sensor for obtaining the inclination angle of the test chamber, and a temperature and humidity sensor for obtaining the temperature and humidity inside the test chamber. The explosion-proof motor, the ventilation system, the angle sensor, and the temperature and humidity sensor are respectively connected to a controller. When the processor of the controller executes its program, it can at least implement the following steps: controlling the opening and closing of the explosion-proof motor, controlling the explosion-proof motor to pause at a preset time point, obtaining the inclination angle of the test chamber and adjusting the test chamber to a preset inclination angle, obtaining the temperature inside the test chamber, and controlling the opening and closing of the ventilation system.

[0015] Further, the front section of the push rod of the push rod assembly has a concave area or the push rod of the push rod assembly is arranged obliquely downward. Both the concave area or the push rod arranged obliquely downward can adapt to the test chamber being slightly tilted backward. Tilting backward means a state where the tail of the ammunition product (end A of the test chamber) is slightly tilted upward (the angle between the tail of the ammunition product and the horizontal plane is not greater than 5°).

[0016] A method for testing the onshore duty environment of an ammunition product using the aforementioned natural environment accelerated test device, the steps include:

[0017] S1. In the natural environment, control the test chamber to be in a horizontal state during a preset time period 1; and / or,

[0018] S2. In the natural environment, control the test chamber to be in an inclined state during a preset time period 2; and / or,

[0019] S3. In the natural environment, control the test chamber to be in a vertical state during a preset time period 3; and / or,

[0020] S4. Arbitrarily combine multiple of S1, S2, and S3;

[0021] S5. In steps S1 - S4, when the temperature inside the test chamber exceeds the maximum value of the temperature threshold range, control the ventilation system to turn on. When the temperature inside the test chamber is lower than the set dead band temperature, control the ventilation system to turn off.

[0022] Beneficial effects: By adopting the solution of the present invention, it is not only possible to meet the combat readiness duty test requirements of ammunition products on the basis of strengthening the solar radiation heat effect and the day-night temperature difference effect, but also to conduct the on-land duty environmental adaptability test and verification of ammunition products truly, accurately and quickly. Moreover, it can quickly and flexibly switch the on-land duty state of ammunition products and accurately control it within 0.5°. By carrying out the natural environment accelerated test on ammunition products using the solution of the present invention, the test results are more accurate and reliable, which is more conducive to accurately evaluating the duty life of ammunition products in complex service environments. At the same time, it can improve the accuracy of batch test results and test efficiency. The natural environment accelerated test device in the present invention is light, compact, small in volume and floor space, and low in cost. Its length is only slightly longer than the specimen, and it is especially suitable for conducting on-land duty environmental tests on ammunition products weighing within one ton. Brief Description of the Drawings

[0023] Figure 1 It is a three-dimensional schematic diagram of the natural environment accelerated test device in Embodiment 1;

[0024] Figure 2 It is a schematic diagram of the test chamber of the natural environment accelerated test device in Embodiment 1;

[0025] Figure 3 It is a plan view of the internal structure of the test chamber of the natural environment accelerated test device in Embodiment 1;

[0026] Figure 4 It is a schematic diagram of the test fixture of the natural environment accelerated test device in Embodiment 1;

[0027] Figure 5 It is a schematic diagram of the framework of the natural environment accelerated test device in Embodiment 1;

[0028] Figure 6 It is a schematic diagram of the internal structure of the ventilation hood of the natural environment accelerated test device in Embodiment 1;

[0029] Figure 7 It is a schematic diagram of the support frame of the natural environment accelerated test device in Embodiment 1;

[0030] Figure 8 It is a schematic diagram of the electric push rod assembly of the natural environment accelerated test device in Embodiment 1;

[0031] Figure 9 It is a schematic diagram when the test chamber of the natural environment accelerated test device in Embodiment 1 is tilted to 60° in this duty state;

[0032] Figures 10 - 12 It is a schematic diagram of three states during the use of the test chamber of the natural environment accelerated test device in Embodiment 4. Detailed Embodiment

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. However, the description of the following embodiments is only for helping to understand the principle and its core idea of the present invention, and does not limit the protection scope of the present invention. It should be noted that for those of ordinary skill in the art in the technical field, improvements made to the present invention without departing from the principle of the present invention also fall within the protection scope of the claims of the present invention.

[0034] Embodiment 1

[0035] As Figures 1 to 8 shown, a natural environment accelerated test device includes a test chamber 1. The inner and outer walls of the test chamber 1 are both sprayed with heat-absorbing coatings. The inner cavity of the test chamber 1 is used to accommodate specimens. The test chamber 1 is rotatably connected to a support frame 2, and the test chamber 1 is also connected to a telescopic mechanism for driving the test chamber 1 to rotate. A movable connection part is provided at the low point of the test chamber 1, and the telescopic rod of the telescopic mechanism is connected to the movable connection part. The root of the telescopic rod and the movable connection part are respectively located on both sides of the rotation axis of the test chamber 1, and when the telescopic rod retracts, the test chamber 1 becomes in an inclined state or a vertical state. Among them, the movable connection part includes a bearing seat 1-4 provided at the bottom of the test chamber 1 and a bearing fitted on the bearing seat 1-4. The rotating shaft installed on the bearing is connected to the telescopic rod of the telescopic mechanism. In this embodiment, the telescopic mechanism adopts an electric push rod assembly 3, which includes a SUS316L stainless steel push rod assembly 3-3. The push rod assembly 3-3 is connected to an explosion-proof motor 3-2. The explosion-proof motor 3-2 is located in a housing 3-4. A cover 3-1 is provided at the upper part of the housing 3-4. The housing 3-4 and the cover 3-1 jointly enclose an open space for accommodating the explosion-proof motor 3-2 and the push rod assembly 3-3. And in the working state, the push rod of the push rod assembly 3-3 extends and retracts from the opening of the open space.

[0036] As Figure 1 shown, the test chamber 1 adopts a non-full cylindrical structure. When the test chamber 1 is in a horizontal state, the arc area of the test chamber 1 faces downward, and the flat area of the test chamber 1 faces upward. The cover plate of the test chamber 1 is located in this flat area. The specimens installed in the inner cavity of the test chamber 1 are arranged in the same axis direction as the test chamber 1, and the bottom end of the specimen abuts against the inner wall of end A of the test chamber 1, that is, the bottom of the ammunition product (specimen) is in close contact with the inner wall of end A, which can be used to restrain the movement of the ammunition product along its axis direction and provide support when the test chamber 1 is in a vertical or non-horizontal state.

[0037] Combined with Figures 2 to 5As shown in the figure, the test chamber 1 includes an outer housing 1-1, a framework 1-11, and an inner housing 1-9. The outer housing 1-1 and the inner housing 1-9 are fixedly connected to the framework 1-11. A detachable sample rack 1-5 is provided in the inner cavity of the test chamber 1 near the edge. The sample rack 1-5 is made of SUS316L stainless steel. A test fixture 1-8 is provided in the middle area of the inner cavity of the test chamber 1 near the sample rack 1-5. The test fixture 1-8 adopts a hoop assembly, and two or three specimens can be clamped on the hoop assembly. The test fixture 1-8 is used to fix the subsystem-level or full-round-level ammunition product 1-10 (i.e., the specimen). A plurality of waterproof seal boxes 1-7 are placed on the sample rack, and small test items such as propellant tensile samples are placed in the waterproof seal boxes 1-7.

[0038] Combined with Figure 2 and Figure 6 As shown in the figure, a ventilation hood 1-3 is provided on the outer side wall of the B end of the test chamber 1. The B end is located on the opposite side of the A end. The inner cavity of the ventilation hood 1-3 is communicated with the inner cavity of the test chamber 1. A ventilation system 1-6 is provided in the ventilation hood 1-3. The ventilation hood 1-3 is arc-shaped, with the arc part of the ventilation hood 1-3 facing down and the horizontal part facing up. The ventilation holes of the ventilation hood 1-3 are located in the arc part.

[0039] Combined with Figure 7 As shown in the figure, the support frame 2 includes two triangular braces 2-4 arranged side by side. The two triangular braces 2-4 are simultaneously connected to the chassis 2-5. A connecting rod 2-6 is provided inside the two triangular braces 2-4. One end of the connecting rod 2-6 is connected to the triangular brace 2-4, and the other end is connected to the chassis 2-5. An ear seat one 2-1 is connected to the top of one triangular brace 2-4, and an ear seat two 2-2 is connected to the top of the other triangular brace 2-4. An ear seat three 2-3 is provided in the middle of the end beam of the chassis 2-5. The ear seat one 2-1 and the ear seat two 2-2 are used for rotatably installing the test chamber 1, and the ear seat three 2-3 is used for rotatably installing the electric push rod assembly 3.

[0040] In this embodiment, it further includes an angle sensor for obtaining the inclination angle of the test chamber 1, a temperature and humidity sensor for obtaining the temperature and humidity inside the test chamber 1. The explosion-proof motor 3-2, the ventilation system 1-6, the angle sensor, and the temperature and humidity sensor are respectively connected to the controller. The angle sensor continuously collects the inclination angle data of the test chamber 1. The temperature and humidity sensor automatically collects data at an interval of 1 time per 10 minutes, and its temperature accuracy does not exceed ±0.5°C. When the processor of the controller executes its program, it can at least implement the following steps: control the opening and closing of the explosion-proof motor 3-2, control the explosion-proof motor 3-2 to pause at a preset time point, obtain the inclination angle of the test chamber 1 and adjust the test chamber 1 to a preset inclination angle, obtain the temperature inside the test chamber 1 and control the opening and closing of the ventilation system 1-6.

[0041] In this embodiment, according to the electrical wiring requirements, corresponding electrical components (switches, meters, protective electrical appliances, etc.) are installed in the electrical control cabinet 4, and the electrical control cabinet 4 is installed close to the side wall of the support frame 2.

[0042] In this embodiment, the outer casing 1-1 and the inner casing 1-9 are welded to the skeleton 1-11. The arc surface, left / right side surfaces of the test chamber 1 are made of SUS316L stainless steel plates; between the arc surface, left / right side surfaces of the test chamber body 1, a polyurethane foam material with a thickness of not less than 50 mm is filled between the outer casing 1-1 and the inner casing 1-9; for the cover plate 1-2 of the test chamber 1, the connection part with the chamber body is sealed with a silicone rubber strip resistant to salt spray corrosion to ensure the sealing effect; the cover plate 1-2 is made of an aluminum plate with a thickness of not less than 1 mm, and the skeleton 1-11 is made of SUS316L stainless steel plates; the materials of the chamber body of the test chamber 1 are all subjected to black anodic oxidation treatment with a thickness greater than 10 μm, and a solar heat-absorbing coating topcoat is sprayed both inside and outside.

[0043] Embodiment 2

[0044] A natural environment accelerated test device, referring to Embodiment 1, the main difference from Embodiment 1 is that: the front section of the push rod of the push rod assembly 3-3 has a concave area, and this concave area can adapt to the test chamber 1 tilting backward by 0-5°.

[0045] Embodiment 3

[0046] A method for conducting an onshore duty environment test on ammunition products using the natural environment accelerated test device in Embodiment 1, the steps include:

[0047] S1. In the natural environment, control the test chamber 1 to be in a horizontal state during a preset time period 1;

[0048] S2. In the natural environment, control the test chamber 1 to be in an inclined state during a preset time period 2;

[0049] S3. In the natural environment, control the test chamber 1 to be in a vertical state during a preset time period 3;

[0050] In steps S1 - S3, if it is calculated according to the onshore duty state of a certain ammunition product that the natural environment accelerated test needs to be carried out in the way of "placed horizontally for 60 minutes - placed at an inclination of 60° for 10 minutes - placed vertically for 5 minutes" and cycled 100 times, then the explosion-proof motor 3-2 can be controlled to run to extend the push rod of the push rod assembly 3-3 first. When the angle sensor feeds back that the test chamber 1 is in a horizontal state, control the explosion-proof motor 3-2 to stop and maintain this state for 60 minutes. Subsequently, control the explosion-proof motor 3-2 to run to retract the push rod of the push rod assembly 3-3. When the angle sensor feeds back that the test chamber 1 is at an inclination of 60° (for the state diagram at this time, see Figure 9As shown, then control the explosion-proof motor 3-2 to stop and maintain this state for 10 minutes. Subsequently, control the explosion-proof motor 3-2 to run so that the push rod of the push rod assembly 3-3 continues to retract. When the angle sensor feedback indicates that the test chamber 1 is tilted at 90° (i.e., the vertical state), then control the explosion-proof motor 3-2 to stop and maintain this state for 5 minutes. In this way, a natural environment accelerated test for one test cycle is completed. For subsequent tests, only need to repeat this process 99 times to end the test;

[0051] In steps S1 - S3, when the temperature inside the test chamber 1 exceeds the set temperature (such as 70°C, with an overshoot of 2°C), control the ventilation system 1-6 to turn on. When the temperature inside the test chamber 1 is lower than the set dead band temperature (such as 65°C), control the ventilation system 1-6 to turn off.

[0052] Example 4

[0053] A method for onshore duty environment test of ammunition products using the natural environment accelerated test device in Example 2, the steps include:

[0054] S1. In the natural environment, control the test chamber 1 to be in a horizontal state during a preset time period 1;

[0055] S2. In the natural environment, control the test chamber 1 to be in an inclined state during a preset time period 2;

[0056] S3. In the natural environment, control the test chamber 1 to be in a vertical state during a preset time period 3;

[0057] S4. In the natural environment, control the test chamber 1 to be at any value within the range of ±3° at a preset time point. In this step, the state diagram when the test chamber 1 is at -3° is shown in Figure 10 , the state diagram when the test chamber 1 is at 0° is shown in Figure 11 , the state diagram when the test chamber 1 is at +3° is shown in Figure 12 , this process can be used to simulate the state of ammunition products during transportation on relatively flat dirt roads or gravel road surfaces;

[0058] In this example, the push rod of the push rod assembly of the natural environment accelerated test device is arranged obliquely downward. This oblique downward arrangement of the push rod can adapt to the test chamber being slightly tilted backward. Being tilted backward means that the tail of the ammunition product (end A of the test chamber) is slightly tilted upward (the angle between the tail of the ammunition product and the horizontal plane is not more than 3°);

[0059] S5. When the temperature inside the test chamber 1 exceeds the set temperature, control the ventilation system 1-6 to turn on. When the temperature inside the test chamber 1 is lower than the set dead band temperature, control the ventilation system 1-6 to turn off.

[0060] When adjusting the state of the test chamber 1, the test chamber 1 rotates around the rotation axis 5 where the test chamber 1 is connected to the support frame 2, and the push rod 3-5 of the push rod assembly 3-3 makes adaptive telescopic movements. At the same time, the push rod assembly 3-3 rotates around the root of the push rod assembly 3-3.

[0061] The present invention can not only meet the combat readiness duty test requirements of ammunition products based on the intensification of solar radiation heat effect and day-night temperature difference effect, but also truly, accurately and quickly carry out the on-land duty environmental adaptability test and verification of ammunition products. It can also quickly and flexibly switch the on-land duty state of ammunition products and accurately control it within 0.5°. Any on-land duty state within the range of -3~90° or 0~90° can be accurately simulated; by using the solution of the present invention to carry out the natural environment accelerated test on ammunition products, the test results are more accurate and reliable, which is more conducive to accurately evaluating the duty life of ammunition products in complex service environments, and at the same time can improve the accuracy and test efficiency of batch test results; the natural environment accelerated test device in the present invention is light, compact, small in volume and floor space, and low in cost. Its length is only slightly longer than the specimen, and it is especially suitable for carrying out on-land duty environmental tests on ammunition products weighing less than one ton.

[0062] In the present invention, the on-land duty environmental test method for ammunition products includes but is not limited to the several situations listed in the embodiments. In actual situations, the user can set the test chamber to any angular state within the allowable range at a preset time period according to the needs.

Claims

1. An accelerated natural environment test device, comprising a test chamber (1), wherein the inner wall and the outer wall of the test chamber (1) are both sprayed with heat-absorbing coatings, and the inner cavity of the test chamber (1) is used to accommodate specimens, and is characterized in that: The test chamber (1) is rotatably connected to the support frame (2), and the test chamber (1) is further connected to a telescopic mechanism for driving the test chamber (1) to rotate; a movable connection part is arranged at the low point of the test chamber (1), the telescopic rod of the telescopic mechanism is connected to the movable connection part, and the root of the telescopic rod and the movable connection part are respectively located on both sides of the rotation axis of the test chamber (1). When the telescopic rod retracts, the test chamber (1) becomes inclined or vertical; the movable connection part includes a bearing seat (1-4) arranged at the bottom of the test chamber (1) and a bearing fitted on the bearing seat (1-4), and a rotating shaft installed on the bearing is connected to the telescopic rod of the telescopic mechanism; the test chamber (1) adopts a non-full cylindrical structure, the arc area of the test chamber (1) faces downward, the plane area of the test chamber (1) faces upward, and the cover plate of the test chamber (1) is located in this plane area; the specimen installed in the inner cavity of the test chamber (1) is arranged in the same axis direction as the test chamber (1), and the bottom end of the specimen abuts against the inner wall of end A of the test chamber (1); the specimen is a fixed sub-system level ammunition product.

2. The natural environment accelerated test device according to claim 1, characterized in that: The test chamber (1) includes an outer shell (1-1), a skeleton (1-11), and an inner shell (1-9). The outer shell (1-1) and the inner shell (1-9) are fixedly connected to the skeleton (1-11). A sample rack (1-5) and a test fixture (1-8) are arranged in the inner cavity of the test chamber (1), and the test fixture (1-8) adopts a hoop assembly.

3. The natural environment accelerated test device according to claim 2, characterized in that: A ventilation hood (1-3) is arranged on the outer side wall of end B of the test chamber (1), end B is located on the opposite side of end A, the inner cavity of the ventilation hood (1-3) is communicated with the inner cavity of the test chamber (1), a ventilation system (1-6) is arranged in the ventilation hood (1-3), the ventilation hood (1-3) is arc-shaped, the arc part of the ventilation hood (1-3) faces downward and the horizontal part faces upward, and the ventilation holes of the ventilation hood (1-3) are located in the arc part.

4. The natural environment accelerated test device according to claim 3, characterized in that: The telescopic mechanism adopts an electric push rod assembly (3), which includes a push rod assembly (3-3). The push rod assembly (3-3) is connected to an explosion-proof motor (3-2). The explosion-proof motor (3-2) is located in a housing (3-4). A cover (3-1) is arranged on the upper part of the housing (3-4). The housing (3-4) and the cover (3-1) jointly enclose an open space for accommodating the explosion-proof motor (3-2) and the push rod assembly (3-3). In the working state, the push rod of the push rod assembly (3-3) extends and retracts from the opening of the open space.

5. The natural environment accelerated test device according to any one of claims 1-4, characterized in that: The support frame (2) includes two triangular braces (2-4) arranged side by side. The two triangular braces (2-4) are simultaneously connected to the chassis (2-5). A connecting rod (2-6) is arranged inside the two triangular braces (2-4). One end of the connecting rod (2-6) is connected to the triangular brace (2-4) and the other end is connected to the chassis (2-5); an ear seat one (2-1) is connected to the top of one triangular brace (2-4), and an ear seat two (2-2) is connected to the top of the other triangular brace (2-4). An ear seat three (2-3) is arranged in the middle of the end beam of the chassis (2-5). The ear seat one (2-1) and the ear seat two (2-2) are used for rotatably installing the test chamber (1), and the ear seat three (2-3) is used for rotatably installing the electric push rod assembly (3).

6. The natural environment accelerated test device according to claim 4, characterized in that It further includes an angle sensor for obtaining the inclination angle of the test chamber (1), and a temperature and humidity sensor for obtaining the temperature and humidity inside the test chamber (1). The explosion-proof motor (3-2), the ventilation system (1-6), the angle sensor, and the temperature and humidity sensor are respectively connected to a controller. When the processor of the controller executes its program, the following steps can be achieved: controlling the opening and closing of the explosion-proof motor (3-2), controlling the explosion-proof motor (3-2) to pause at a preset time point, obtaining the inclination angle of the test chamber (1) and adjusting the test chamber (1) to a preset inclination angle, obtaining the temperature inside the test chamber (1) and controlling the opening and closing of the ventilation system (1-6).

7. The natural environment accelerated test device according to claim 6, characterized in that: The front section of the push rod of the push rod assembly (3-3) has a concave area, and this concave area can adapt to the slight backward tilt of the test chamber (1).

8. A test method using the natural environment accelerated test device according to claim 7, characterized in that the steps It includes: S1. In the natural environment, control the test chamber (1) to be in a horizontal state during a preset time period 1; and / or, S2. In the natural environment, control the test chamber (1) to be in an inclined state during a preset time period 2; and / or, S3. In the natural environment, control the test chamber (1) to be in a vertical state during a preset time period 3; and / or, S4. Arbitrarily combine multiple items among S1, S2, and S3; S5. In steps S1-S4, when the temperature inside the test chamber (1) exceeds the set temperature value, control the ventilation system (1-6) to turn on, and when the temperature inside the test chamber (1) is lower than the set differential temperature, control the ventilation system (1-6) to turn off.

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