Illumination fatigue test device for rail transit vehicle hose

Abstract

The utility model provides an illumination fatigue test device for a rail transit vehicle hose, the illumination fatigue test device for the rail transit vehicle hose comprises a test box body, an illumination assembly and a bending assembly, the illumination assembly comprises a sliding piece, a light source body and a lamp holder, and the lamp holder is slidably arranged at the first end of the test box body through the sliding piece; the light source body is detachably arranged on the lamp holder, the bending assembly comprises a sample positioning piece and a bending swing piece, the bending swing piece is arranged at the second end of the test box body, and the sample positioning piece is arranged between the illumination assembly and the bending swing piece. The test device can simultaneously perform an illumination test and a bending fatigue test on the sample body, can solve the problem of difficulty in installation, simplifies the test process, and can replace a light source, adjust the illumination distance and change the bending degree and angle to achieve comprehensiveness, flexibility and accuracy in the test process; and more comprehensive and deep research of the test hose is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rail transit test devices, in particular to a light irradiation fatigue test device for rail transit vehicle hoses. BACKGROUND

[0002] There is a kind of hose on the rail transit vehicle, which is exposed to sunlight and performs periodic bending motion with the running of the vehicle. In order to verify whether the hose produces cracks under the use condition, an ultraviolet light resistance fatigue test is usually carried out, and the fatigue motion is performed under the irradiation of an ultraviolet lamp.

[0003] The existing test device has the following problems due to the limitation of structure and layout: 1. Different hose lengths have different sizes, which may cause installation difficulties, resulting in a complicated experimental process; 2. The light source of the existing experimental device is a fixed ultraviolet lamp, which cannot be replaced and cannot use other light sources; 3. The distance between the light source and the test sample hose is not easy to adjust, resulting in that the light irradiation test can only be carried out within a limited distance; 4. When the test sample hose is subjected to bending fatigue strength, it can only be bent at a specific angle, and cannot realize omnidirectional bending test.

[0004] Therefore, it is necessary to design a light irradiation fatigue test device for rail transit vehicle hoses to solve the above problems. CONTENT OF THE INVENTION

[0005] Therefore, in order to overcome the defects of the prior art, the present application provides a light irradiation fatigue test device for rail transit vehicle hoses, which effectively solves the problems of existing test sample devices, such as installation difficulty, single light source, inability to adjust the irradiation distance, and single bending direction.

[0006] According to the light irradiation fatigue test device for rail transit vehicle hoses provided by the present application, the light irradiation fatigue test device for rail transit vehicle hoses comprises a test box body, a light irradiation assembly and a bending assembly, the light irradiation assembly and the bending assembly are arranged inside the test box body, the light irradiation assembly comprises a sliding member, a light source body and a lamp holder, the lamp holder is slidably arranged at a first end of the test box body through the sliding member, the light source body is detachably arranged on the lamp holder, the bending assembly comprises a test sample positioning member and a bending swing member, the bending swing member is arranged at a second end of the test box body, and the test sample positioning member is arranged between the light irradiation assembly and the bending swing member to position the test sample body.

[0007] Preferably, the bending swing member comprises a rotating disc and a swing arm, a first end of the swing arm is rotatably connected with the rotating disc, and a second end of the swing arm is connected with the test sample positioning member.

[0008] Preferably, the sample positioning member comprises a fixed part and a moving part, the fixed part is arranged on the test box, and the moving part is connected with the second end of the swing arm; the rotating disc is arranged between the fixed part and the moving part.

[0009] Preferably, the fixed part and the moving part each comprise a connecting end, and the two ends of the sample body are connected with the connecting end of the fixed part and the connecting end of the moving part respectively.

[0010] Preferably, the sliding member comprises a first sliding channel and a second sliding channel facing each other, the first sliding channel and the second sliding channel are arranged at the first end of the test box, the end face of the lamp holder facing the sliding member is provided with a first sliding block and a second sliding block, and the lamp holder is slidably connected with the sliding member through the first sliding block and the second sliding block.

[0011] Preferably, the two ends of the lamp holder are each provided with a quick-change joint, and the two ends of the light source body are provided with connecting heads corresponding to the quick-change joints, and the light source body is detachably connected with the lamp holder through the connecting heads.

[0012] Preferably, the curved swing member further comprises a motor and a counter, the motor is connected with the rotating disc to drive the rotating disc to rotate, and the counter is arranged on the side of the rotating disc.

[0013] Preferably, the light irradiation fatigue test device for rail transit vehicle hoses further comprises a display member, the display member is arranged on the upper part of the test box, and the light irradiation assembly and the bending assembly are arranged on the lower part of the display member.

[0014] Preferably, the light irradiation fatigue test device for rail transit vehicle hoses further comprises a monitoring assembly, the monitoring assembly comprises a temperature monitoring member, a humidity monitoring member and a camera, and the temperature monitoring member, the humidity monitoring member and the camera are arranged in the interior of the test box.

[0015] Preferably, the light irradiation fatigue test device for rail transit vehicle hoses further comprises an exhaust dehumidifying member, a through opening is formed in the bottom of the test box, and the exhaust dehumidifying member is connected with the through opening.

[0016] The light fatigue test device for the rail transit vehicle hose can simultaneously perform light test and bending fatigue test on the sample body through the cooperation of the test box body, the light assembly and the bending assembly.

[0017] In order to make the above objectives, characteristics and advantages of the present application more apparent, comprehensible and easier to understand, the following preferred embodiments are specifically described below, and the accompanying drawings are referred to for a detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 Fig. 1 shows a front view of a light fatigue test device for a rail transit vehicle hose according to an embodiment of the present application;

[0020] Figure 2 Fig. 2 shows a top view of a light fatigue test device for a rail transit vehicle hose according to an embodiment of the present application.

[0021] Reference signs: 1-test box body; 201-first slide; 202-second slide; 3-light source body; 4-lamp holder; 501-fixed part; 502-moving part; 601-rotary disc; 602-swinging arm; 603-motor; 604-counter; 7-connection end; 8-display part; 9-monitoring assembly; 10-ventilation and dehumidification part; 11-first rotation center; 12-second rotation center; 13-sample body. DETAILED DESCRIPTION

[0022] The following detailed description is presented to aid the reader in gaining a comprehensive understanding of the methods, apparatuses, and / or systems described herein. However, various changes, modifications, and equivalents can be used, and thus particular embodiments described herein are not intended as being exhaustive of what the present disclosure can provide. For example, although processes are described with regard to the present disclosure, such processes can include more, fewer, or only a single process. Additionally, some processes can not be implemented even though they are described. Moreover, although processes are described herein as various separate processes, which can be performed by different systems, such processes can not necessarily be performed by different systems and the order of some processes can be changed, including that certain processes could be performed in an iterative or parallel manner. Additionally, various features that are described herein can be implemented as hardware, software, firmware, or combinations thereof, and can be implemented within one or more processors or external to one or more processors, including being implemented across multiple processors. Further, it will be appreciated that features described herein as being implemented with or across one or more processors can be implemented by one or more other processors.

[0023] The features described herein can be implemented in different forms and are not to be construed as limited to the examples described herein. Rather, the described examples have been provided for illustrative purposes so that those skilled in the art will be able to implement the methods, apparatuses, and / or systems described herein in a variety of ways.

[0024] Throughout the specification, when an element (such as a layer, region, or substrate) is referred to as being "on" another element, "connected to" another element, "coupled to" another element, "adjacent to" another element, "on top of" another element, or "covering" another element, it can be directly on, connected to, coupled to, adjacent to, on top of, or covering the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being "directly on," "directly connected to," "directly coupled to," "directly adjacent to," "directly on top of," or "directly covering" another element, there are no other elements interposed therebetween.

[0025] As used herein, the term "and / or" includes any one of the listed items and any combination of two or more of the listed items.

[0026] Although terms such as "first" and "second" can be used herein to describe various elements, components, regions, layers, or sections, these elements, components, regions, layers, or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer, or section from another element, component, region, layer, or section. Thus, the first element, component, region, layer, or section described in the examples described herein could also be called a second element, component, region, layer, or section without departing from the teachings of the examples.

[0027] For ease of description, spatially relative terms, such as "on", "upper", "lower", "below", and "above", are used herein for the purpose of illustrating one element's relationship to another element within the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as being "on" or "upper" relative to other elements would then be oriented "below" or "lower" relative to the other elements. Thus, the term "on" encompasses both an "on" and "below" orientation. The device can be oriented in other ways (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein are interpreted accordingly.

[0028] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of examples. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has", "having" as used herein, are specifically intended to be construed as open-ended terms, i.e., to mean "including, but not limited to", "including, but not limited to", "including, but not limited to" and "including, but not limited to", respectively.

[0029] Variations in the shapes of the elements illustrated in the figures can occur because of manufacturing processes and / or tolerances. Thus, the examples described herein are not limited to the specific shapes of the elements illustrated in the figures, but include variations in shapes that would occur to one of ordinary skill in the art upon inspection of the present disclosure.

[0030] The features of the examples described herein can be combined in a variety of ways as will be apparent after review of the disclosure. Also, while the examples described herein have a variety of configurations, other configurations are possible.

[0031] According to the light irradiation fatigue test device for rail transit vehicle hose provided by the utility model, as shown in Figure 1 and Figure 2 the light irradiation fatigue test device for rail transit vehicle hose can facilitate the light irradiation fatigue test of the hose to detect the performance of the hose, and the light irradiation fatigue test device for rail transit vehicle hose comprises a test box body 1, a light irradiation assembly and a bending assembly.

[0032] In the following description, the test box body 1, the light irradiation assembly and the bending assembly of the light irradiation fatigue test device for rail transit vehicle hose will be described in detail with reference to Figure 1 and Figure 2 As shown in Figure 1As shown, it is a front view of the light fatigue test device for the rail transit vehicle hose, and it can be understood that the hose (sample body 13 in the figure) is placed vertically, that is, one end of the sample body 13 is on the top and the other end is on the bottom.

[0033] As shown in Figure 1 and Figure 2 In the embodiment, the test box 1 is the main body of the light fatigue test device for the rail transit vehicle hose, used to carry the light assembly, the bending assembly and the sample body 13. The test box 1 can be formed into a hollow cuboid structure, and the light assembly, the bending assembly and the sample body 13 are placed in the hollow interior of the cuboid structure. The test box 1 can be supported by metal materials such as stainless steel or aluminum alloy, and the size of the test box 1 can be specifically selected according to needs, which is not limited here. The light assembly can provide different light sources to illuminate the sample body 13, thereby simulating the light in the real environment and performing light test. The bending assembly can drive the sample body 13 to bend repeatedly, thereby simulating the bending of the hose in the real environment and performing bending fatigue test.

[0034] Specifically, the light assembly can include a sliding piece, a light source body 3 and a lamp holder 4, the lamp holder 4 is slidably arranged at the first end of the test box 1 through the sliding piece, and the sliding piece can adjust the position of the lamp holder 4, thereby adjusting the distance between the light source body 3 and the sample body 13, so that the light test under multiple light distances can be performed, making the test more real and accurate. The light source body 3 is detachably arranged on the lamp holder 4, and the user can replace different light source bodies 3 according to needs, such as UVA lamp tube, UVB lamp tube or xenon lamp, thereby performing light test under different light sources. The bending assembly can include a sample positioning piece and a bending swing piece, the sample positioning piece is used to fix the sample body 13, and the bending swing piece is used to drive the sample body 13 to bend. The bending swing piece is arranged at the second end of the test box 1, and it can be understood that the first end and the second end of the test box 1 are two opposite ends, and the light assembly and the bending assembly need to ensure sufficient installation space. The sample positioning piece is arranged between the light assembly and the bending swing piece to position the sample body 13, which also facilitates the simultaneous performance of light test and bending fatigue test.

[0035] Thus, the light irradiation and fatigue test device for rail transit vehicle hose can simultaneously perform light irradiation test and bending fatigue test on the test sample body 13 through the cooperation of the test box 1, the light irradiation assembly and the bending assembly. During the light irradiation test, the distance between the light source body 3 and the test sample body 13 can be changed by the sliding piece to adjust the light irradiation distance, and the light source can be changed by replacing the light source body 3 on the lamp holder 4; the two ends of the test sample body 13 are fixed by the test sample positioning piece, and the test sample body 13 is repeatedly bent by the bending swing piece. Due to the arrangement of the test sample positioning piece, the light irradiation and fatigue test device for rail transit vehicle hose can solve the problem of difficult installation, thereby simplifying the test process, and can replace the light source, adjust the light irradiation distance, and change the bending degree and angle to achieve comprehensiveness, flexibility and accuracy in the test process, facilitating more comprehensive and in-depth research on the test hose.

[0036] Preferably, as shown in Figure 1 and Figure 2 , in the embodiment, the bending swing piece can include a rotating disc 601 and a swing arm 602, the first end of the swing arm 602 is rotatably connected with the rotating disc 601, and the second end of the swing arm 602 is connected with the test sample positioning piece. The rotating disc 601 can rotate around the first rotation center 11, the first end of the swing arm 602 is rotatably connected with the edge of the rotating disc 601, the swing arm 602 itself rotates around the second rotation center 12, so that when the rotating disc 601 rotates, it drives the swing arm 602 to rotate around the second rotation center 12, and the second end of the swing arm 602 drives the test sample positioning piece to change position.

[0037] Preferably, as shown in Figure 1 and Figure 2 , in the embodiment, the test sample positioning piece can include a fixed part 501 and a moving part 502, the fixed part 501 is arranged in the test box 1, and the moving part 502 is connected with the second end of the swing arm 602. The fixed part 501 is fixed, the moving part 502 moves with the swing arm 602, and the fixed part 501 and the moving part 502 are respectively connected with the two ends of the test sample body 13.

[0038] Preferably, as shown in Figure 1 , in the embodiment, the rotating disc 601 is arranged between the fixed part 501 and the moving part 502. It can be understood that the fixed part 501 and the moving part 502 are arranged at the upper part and the lower part of the test box 1 respectively, so that the test sample body 13 has enough movement space.

[0039] Preferably, as shown in Figure 1 and Figure 2As shown in the embodiments, the fixed part 501 and the moving part 502 each include a connecting end 7, and the two ends of the sample body 13 are connected with the connecting end 7 of the fixed part 501 and the connecting end 7 of the moving part 502 respectively. The connecting end 7 may, for example, be a quick connector commonly used in the field of rail trains, and can realize quick plugging with the sample body 13, thereby improving the testing speed and reducing the installation difficulty.

[0040] Preferably, as shown in the embodiments, the first sliding groove 201 and the second sliding groove 202 are arranged on the first end of the test box 1, and the end surface of the lamp holder 4 facing the sliding member is provided with a first sliding block and a second sliding block, and the lamp holder 4 is slidably connected with the sliding member through the first sliding block and the second sliding block. Figure 1 and Figure 2 As shown in the embodiments, the sliding member can include a first sliding groove 201 and a second sliding groove 202 facing each other, and the first sliding groove 201 and the second sliding groove 202 are arranged on the first end of the test box 1. The end surface of the lamp holder 4 facing the sliding member is provided with a first sliding block and a second sliding block, and the lamp holder 4 is slidably connected with the sliding member through the first sliding block and the second sliding block. The first sliding groove 201, the second sliding groove 202, the first sliding block and the second sliding block can each be a commonly used sliding groove and sliding block, and the sliding block can slide on the sliding groove to adjust the position of the lamp holder 4 connected with the sliding block, thereby changing the distance between the light source body 3 and the sample body 13.

[0041] Preferably, in the embodiments, the two ends of the lamp holder 4 are each provided with a quick-change connector (not shown due to angle reasons), and the two ends of the light source body 3 are provided with connecting heads corresponding to the quick-change connectors. The light source body 3 is detachably connected with the lamp holder 4 through the connecting heads. The light source body 3 can be formed as a lamp tube, and the two ends of the lamp tube are provided with the connecting heads. The inner sides of the two ends of the lamp holder 4 are provided with the quick-change connectors corresponding to the connecting heads. The quick-change connectors and the connecting heads can each be a commonly used connecting head in the field of lighting, and can realize convenient replacement of the light source body 3.

[0042] Preferably, as shown in the embodiments, the first sliding groove 201 and the second sliding groove 202 are arranged on the first end of the test box 1, and the end surface of the lamp holder 4 facing the sliding member is provided with a first sliding block and a second sliding block, and the lamp holder 4 is slidably connected with the sliding member through the first sliding block and the second sliding block. Figure 1 and Figure 2 As shown in the embodiments, the curved swinging member can further include a motor 603 and a counter 604, the motor 603 is connected with the rotating disc 601 to drive the rotating disc 601 to rotate, and the counter 604 is arranged on the side of the rotating disc 601. The counter 604 is used to record the number of rotations of the rotating disc 601, thereby knowing the number of bending of the sample body 13 at this time, and can make the bending fatigue test result more accurate.

[0043] Preferably, as shown in the embodiments, the first sliding groove 201 and the second sliding groove 202 are arranged on the first end of the test box 1, and the end surface of the lamp holder 4 facing the sliding member is provided with a first sliding block and a second sliding block, and the lamp holder 4 is slidably connected with the sliding member through the first sliding block and the second sliding block. Figure 1 and Figure 2 As shown in the embodiments, the track traffic vehicle hose light irradiation fatigue test device further includes a display member 8, the display member 8 is arranged on the upper part of the test box 1, and the light irradiation assembly and the bending assembly are arranged on the lower part of the display member 8. The display member 8 can be a commonly used LED display screen in the prior art, and can be used to feedback various parameters of the test box 1 at this time, such as the number of rotations of the rotating disc 601, temperature and humidity, etc.

[0044] Preferably, as Figure 1 and Figure 2 As shown in the embodiment, the light exposure fatigue test device for rail transit vehicle hose can further comprise a monitoring assembly 9, which can comprise a temperature monitoring element, a humidity monitoring element and a camera, all arranged inside the test box 1. The temperature monitoring element can be, for example, a temperature sensor for measuring the temperature inside the test box 1, the humidity monitoring element can be, for example, a humidity detector for measuring the humidity inside the test box 1, and the camera can be a camera commonly known in the art for monitoring the situation inside the test box 1.

[0045] Preferably, as Figure 1 and Figure 2 As shown in the embodiment, the light exposure fatigue test device for rail transit vehicle hose further comprises an exhaust dehumidifying element 10, and the bottom of the test box 1 is provided with a through port (not shown due to angle reasons), and the exhaust dehumidifying element 10 is connected with the through port. The exhaust dehumidifying element 10 can be, for example, an exhaust dehumidifier for reducing the temperature and humidity inside the test box 1, and the user can adjust the environmental conditions inside the test box 1 through the exhaust dehumidifying element 10 to meet the optimal test conditions.

[0046] The use process of the light exposure fatigue test device for rail transit vehicle hose is as follows: first, connect the two ends of the test sample body 13 with the connecting ends 7 of the fixed part 501 and the moving part 502 respectively, then select a suitable light source body 3, install the light source body 3 on the lamp holder 4, and adjust the position of the lamp holder 4 through the first slide 201 and the second slide 202, so that the distance between the light source body 3 and the test sample body 13 is appropriate. Then power on the light source body 3 and the motor 603 respectively, so that the light source body 3 emits light, the motor 603 drives the rotating disc 601 to rotate, the rotating disc 601 drives the swinging arm 602 to move through the moving part 502, and then the test sample body 13 is bent. During the test, the user can observe the state inside the test box 1 through the display element 8 until the test is completed.

[0047] The light fatigue test device for rail transit vehicle hose can simultaneously perform light test and bending fatigue test on the sample body through the cooperation of the test box, the light assembly and the bending assembly. In the light test process, the distance between the light source body and the sample body can be changed to adjust the light distance by the sliding member, and the light source can be changed by replacing the light source body on the lamp holder; the two ends of the sample body are fixed by the sample positioning member, and the sample body is repeatedly bent by the bending swing member. The light fatigue test device for rail transit vehicle hose can solve the installation difficulty problem due to the arrangement of the sample positioning member, thereby simplifying the test process, and can replace the light source, adjust the light distance, and change the bending degree and angle to achieve the comprehensiveness, flexibility and accuracy in the test process, so as to facilitate the test hose to carry out more comprehensive and in-depth research.

[0048] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present application, which are used to illustrate the technical solutions of the present application, but not to limit them, and the protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or replace some technical features with equivalent ones within the technical scope disclosed by the present application. Such modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A light exposure fatigue test device for a rail vehicle hose, characterized by, The light fatigue test device for the rail transit vehicle hose comprises a test box body, a light assembly and a bending assembly, the light assembly and the bending assembly are arranged in the interior of the test box body, the light assembly comprises a sliding piece, a light source body and a lamp holder, the lamp holder is slidably arranged at the first end of the test box body through the sliding piece, the light source body is detachably arranged on the lamp holder, the bending assembly comprises a sample positioning piece and a bending swing piece, the bending swing piece is arranged at the second end of the test box body, and the sample positioning piece is arranged between the light assembly and the bending swing piece to position the sample body.

2. The light-weathering test device for a railcar hose according to claim 1, characterized by The bending swing piece comprises a rotating disc and a swing arm, the first end of the swing arm is rotatably connected with the rotating disc, and the second end of the swing arm is connected with the sample positioning piece.

3. The light-weathering test device for a railcar hose according to claim 2, characterized by The sample positioning piece comprises a fixed part and a moving part, the fixed part is arranged on the test box body, and the moving part is connected with the second end of the swing arm. The rotating disc is arranged between the fixed part and the moving part.

4. The light-weathering test device for a railcar hose according to claim 3, characterized by The fixed part and the moving part each comprise a connecting end, and the two ends of the sample body are connected with the connecting end of the fixed part and the connecting end of the moving part respectively.

5. The light-weathering test device for a railcar hose according to claim 1, characterized by The sliding piece comprises a first sliding channel and a second sliding channel facing each other, the first sliding channel and the second sliding channel are arranged at the first end of the test box body, and the end face of the lamp holder facing the sliding piece is provided with a first sliding block and a second sliding block, the lamp holder is slidably connected with the sliding piece through the first sliding block and the second sliding block.

6. The light-weathering test device for a railcar hose according to claim 1, characterized by The two ends of the lamp holder are provided with quick-change connectors, and the two ends of the light source body are provided with connecting heads corresponding to the quick-change connectors, the light source body is detachably connected with the lamp holder through the connecting heads.

7. The light-weathering test device for a railcar hose according to claim 2, characterized by The bending swing piece further comprises a motor and a counter, the motor is connected with the rotating disc to drive the rotating disc to rotate, and the counter is arranged on the side of the rotating disc.

8. The light-weathering test device for a railcar hose according to claim 1, characterized by The light fatigue test device for the rail transit vehicle hose further comprises a display piece, the display piece is arranged on the upper part of the test box body, and the light assembly and the bending assembly are arranged on the lower part of the display piece.

9. The light-weathering test device for a railcar hose according to claim 1, characterized by The light fatigue test device for the rail transit vehicle hose further comprises a monitoring assembly, the monitoring assembly comprises a temperature monitoring piece, a humidity monitoring piece and a camera, and the temperature monitoring piece, the humidity monitoring piece and the camera are arranged in the interior of the test box body.

10. The light-weathering test apparatus for a railcar hose according to claim 1, characterized by The light fatigue test device for the rail transit vehicle hose further comprises an exhaust dehumidifying piece, and the bottom of the test box body is provided with a through opening, and the exhaust dehumidifying piece is connected with the through opening.

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