Testing device and testing method for adsorption capacity of gas purification material

Abstract

The invention relates to a testing device for the adsorption capacity of a gas purification material. The testing device comprises a testing chamber and a transition chamber which are adjacent to each other and jointly form a closed space, and a conveying assembly, the conveying assembly comprises a rod part and an end part which are connected, and the rod part is used for transferring the end part and an adsorption material sample placed on the end part in the test chamber and the transition chamber through self movement; in the first state, the adsorption material sample and the gas volatilization source are placed in the test chamber along with the end part for an adsorption test; in the second state, the adsorption material sample after the adsorption test is placed in the transition chamber along with the end part for standing, and an adsorption material is arranged on the inner wall of the transition chamber so as to purify the gas overflowing from the adsorption material in the standing process. According to the invention, through the matching design of the test chamber, the transition chamber and the conveying assembly and the standing treatment of the closed space, the overflow of harmful gas is effectively reduced, the tester is protected, and the possible harm caused by the overflow of the harmful gas to the tester is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification, and in particular to a testing device and a testing method for the adsorption capacity of a gas purification material. Background Art

[0002] In the field of air purification, static adsorption capacity is one of the key parameters for evaluating the adsorption performance of adsorbent materials for harmful gases. In experiments, a certain mass of adsorbent material is usually placed in an environment saturated with harmful gases for measurement. In this process, harmful gases evaporate from the source, diffuse to the surface of the adsorbent material and are adsorbed; after a certain period of time, the adsorbent material is taken out of the adsorption device and weighed, and the increase in the mass of the material is defined as the static adsorption capacity of the adsorbent material for harmful gases. Usually, the entire test process needs to be repeated many times until the mass of the material reaches a stable value.

[0003] The existing adsorption device directly takes out the adsorbed material after the adsorption test for mass measurement, which has the following problems: 1. When the adsorbed material is taken out of the device for mass measurement, harmful gases will leak into the environment, which may cause certain harm to the health and safety of the test personnel; 2. In the process of taking out the adsorbed material, the stable gas atmosphere (gas concentration, humidity) that has been formed in the device will be quickly destroyed, which may cause certain interference to the accuracy and scientificity of the entire experimental data and conclusions (adsorption rate, humidity effect, kinetic analysis, etc.); 3. In the experiment of studying the influence of temperature and humidity on adsorption behavior, the entire adsorption device needs to be placed in an instrument that can accurately control temperature (such as a constant temperature and humidity chamber), which makes the experiment dependent on the temperature and humidity control instrument, and then makes the experiment subject to the test site. 4. When conducting adsorption experiments at higher temperatures, test personnel may need to contact devices or containers at a certain temperature, which may pose a risk of burns.

[0004] In the prior art, patent CN106226468A discloses a gas adsorbent testing device, including a box body, a hatch, a gas inlet hole and a glove mounting hole are arranged on the side of the box body, and a chemical resistant glove is installed in the box body facing the glove mounting hole. Before the gas to be tested is introduced, a sealed can containing a measured gas adsorbent is placed in the chamber. After the gas to be tested is introduced into the sealed box body, the sealed can is opened through the chemical resistant gloves sealed on the box body for testing.

[0005] Although the above patent adopts the design of chemical-resistant gloves, there is still a risk of leakage of harmful gases. For example, when the adsorbent needs to be taken out for measurement in the middle of the experiment, there is a leakage problem; in addition, after the end of the experiment, the adsorbent needs to be taken out, and there is also a leakage problem. At the same time, the above patent also has the following shortcomings: 1. The patent does not have heating and temperature control elements, so it is not possible to measure the performance at higher temperatures; 2. After the start of the experiment, the patent cannot achieve flexible removal of the adsorbent, so it is not possible to monitor the change in the quality of the adsorbent in real time, so it is impossible to accurately judge the time when the adsorption reaches saturation, and then it is impossible to study the adsorption dynamics. 3. The patent lacks a timing tool, so external timing is required, which brings certain inconveniences to the experiment.

[0006] In view of the above problems, the present invention is proposed. Summary of the invention

[0007] The invention discloses a testing device and a testing method for the adsorption capacity of a gas purification material, aiming to solve the technical problems existing in the prior art.

[0008] The present invention adopts the following technical solutions:

[0009] On the one hand, the present invention provides a test device for the adsorption capacity of a gas purification material, characterized in that it comprises a test chamber 1 and a transition chamber 2 adjacent to each other and forming a closed space together, and a transport component 5;

[0010] A first closed door 21 is provided between the test chamber 1 and the transition chamber 2. The test chamber 1 is connected to or isolated from the transition chamber 2 by opening and closing the first closed door 21.

[0011] The transport assembly 5 includes a connected rod portion 51 and an end portion 52, wherein the rod portion 51 is used to transfer the end portion 52 and the adsorption material sample placed thereon between the test chamber 1 and the transition chamber 2 by its own movement; in a first state, the adsorption material sample and the gas volatilization source are placed in the test chamber 1 along with the end portion 52 for adsorption test; in a second state, the adsorption material sample after the adsorption test is placed in the transition chamber 2 along with the end portion 52 for standing, and adsorption material is arranged on the inner wall of the transition chamber 2 to purify the gas overflowing from the adsorption material during the standing process.

[0012] As a preferred technical solution, a manual button and a solenoid valve are provided on the outer wall of the transition chamber 2 for controlling the opening and closing of the first closed door 21 .

[0013] As a preferred technical solution, a second closed door 3 is further provided on the wall of the transition chamber 2 , and the transition chamber 2 is connected to or isolated from the external environment by opening and closing the second closed door 3 .

[0014] As a preferred technical solution, an opening is provided on the second closed door 3 for the rod portion 51 of the conveying assembly 5 to pass through.

[0015] As a preferred technical solution, the adsorption material on the inner wall of the test chamber 1 is one or more of activated carbon fiber, mesoporous material, silica gel, molecular sieve, and alumina.

[0016] As a preferred technical solution, a heating belt and a temperature control device are provided on the inner wall of the test chamber 1 to control the indoor temperature.

[0017] As a preferred technical solution, the indoor temperature range is 15-200°C.

[0018] As a preferred technical solution, the outer wall of the test chamber 1 is made of a heat-insulating material to maintain the indoor temperature of the test chamber 1 .

[0019] As a preferred technical solution, the thermal insulation material is one or more of glass wool, rock wool, and plant fiberboard.

[0020] As a preferred technical solution, a timer is provided on the outer wall of the test chamber 1 for counting the time of the adsorption test.

[0021] As a preferred technical solution, the timer is an electronic stopwatch.

[0022] As a preferred technical solution, a test table 4 is also provided in the test chamber 1 for placing adsorption materials and gas volatilization sources.

[0023] As a preferred technical solution, the transport device 5 further includes a handle 53 for external test personnel to control the movement of the transport device 5 .

[0024] As another aspect, the present invention further provides a method for testing the adsorption capacity of a gas purification material using the above-mentioned testing device for the adsorption capacity of a gas purification material, characterized in that it comprises the following steps:

[0025] Step S1: placing a certain amount of gas volatilization source and adsorption material sample in the test chamber 1;

[0026] Step S2: adjusting the indoor temperature to a specified temperature through the heating belt and temperature control device in the test chamber 1 and starting the adsorption test;

[0027] Step S3: placing the adsorption material sample after the adsorption test in the transition chamber 2 for rest;

[0028] Step S4: taking out the adsorption material sample after standing and weighing it;

[0029] Step S5: repeating S1-S6 until the weight of the adsorbent sample increases to a constant value;

[0030] Calculation step S6: Calculate the adsorption capacity of the adsorption material sample.

[0031] As a preferred technical solution, step S1 includes step S11 , pulling the rod 51 of the transport assembly 5 , placing the end 52 in the transition chamber 2 , and fixing the gas volatilization source and the adsorption material sample on the end 52 .

[0032] As a preferred technical solution, step S1 includes step S12 , which is to place the end portion 52 and the adsorption material sample and the gas volatilization source thereon into the test chamber 1 by pushing the rod portion 51 of the transport assembly 5 .

[0033] As a preferred technical solution, step S1 includes step S13, which involves pulling the rod 51 of the transport assembly 5 to withdraw the end portion 52 and the rod 51 from the test chamber 1 and closing the first closed door 21.

[0034] The technical solution adopted by the present invention can achieve at least one of the following beneficial effects:

[0035] 1. The present invention adopts a matching design of a test room, a transition room and a transport component, and effectively reduces the overflow of harmful gases through static treatment in a closed space, thereby protecting test personnel and avoiding possible harm caused by the overflow of harmful gases.

[0036] 2. The design of the heating belt and temperature control device in the test chamber of the present invention can accurately control the temperature and ensure accurate measurement of the static adsorption capacity of the adsorption material for harmful gases under safe conditions; at the same time, it effectively avoids dependence on external heat sources, thereby greatly improving the flexibility of the experiment.

[0037] 3. During the adsorption test of the present invention, the first closed door is closed and there is human intervention, which effectively reduces the damage to the experimental conditions caused by human operation, thereby ensuring the accuracy of the experimental data and the scientific nature of the experiment.

[0038] 4. The present invention has a timer design and has a timing function. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments, which constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions explain the present invention and do not constitute improper limitations on the present invention. In the drawings:

[0040] Figure 1 It is a front view schematic diagram of the internal structure of a testing device for the adsorption capacity of a gas purification material of the present invention;

[0041] Figure 2 A schematic top view of the internal structure of a test device for the adsorption capacity of a gas purification material according to the present invention;

[0042] Figure 3A side view schematic diagram of the internal structure of a test device for the adsorption capacity of a gas purification material according to the present invention;

[0043] Figure 4 It is a structural schematic diagram of a conveying assembly according to Embodiment 1 of the present invention;

[0044] Figure 5 It is a structural schematic diagram of a conveying assembly according to Embodiment 2 of the present invention;

[0045] Figure 6 The figure is a flow chart of a method for testing the adsorption capacity of a gas purification material according to the present invention.

[0046] Description of reference numerals:

[0047] 1. Test room; 2. Transition room; 21. First closed door; 22. Wall; 3. Second closed door; 4. Test bench; 5. Transport assembly; 51. Rod; 52. End; 521. Left clamp; 522. Right clamp; 53. Handle. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. In the description of the present invention, it should be noted that the term "or" is usually used in the sense of including "and / or", unless the content clearly indicates otherwise.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a magnetic connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0050] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] In order to solve the problems existing in the prior art, the embodiments of the present invention provide a testing device and a testing method for the adsorption capacity of a gas purification material, such as Figure 1-3As shown, it includes a closed space formed by the adjacent test chamber 1 and transition chamber 2, and a transport assembly 5. In the above-mentioned closed space, a wall 22 is arranged between the test chamber 1 and the transition chamber 2, and a first closed door 21 is arranged on the wall 22. The test chamber 1 is connected or isolated with the transition chamber 2 by the switch of the first closed door 21. The test chamber 1 is used to accurately measure the static adsorption capacity of the adsorbent material for the target gas, especially the harmful gas, under specific environmental conditions; that is, the target gas volatilization source and the adsorbent material are placed in the test chamber 1 at the same time for adsorption test to test the static adsorption capacity of the adsorbent material. The transition chamber 2 is used as a buffer zone for the static placement of the adsorbent material after the adsorption test, on the one hand to avoid the interference of the external environment and the influence of external factors on the test results, and to maintain the accuracy of the adsorption test; on the other hand, the inner wall of the transition chamber 2 is arranged with an adsorbent material, preferably a porous adsorbent material, such as activated carbon fiber, mesoporous material, silica gel, molecular sieve, alumina, etc., for treating the harmful gas that is not adsorbed and leaks into the environment, so as to avoid certain health and safety hazards to the test personnel.

[0052] The transport assembly 5 includes a rod 51 and an end 52 connected to each other. The end 52 is used to place or fix the adsorbent material and / or the gas volatilization source. The end 52 and the adsorbent material and / or the gas volatilization source thereon can be placed in the test chamber 1 or the transition chamber 2 by pushing or pulling the rod 51. That is, the transport assembly 5 is used to transfer the adsorbent material and the gas volatilization source between the test chamber 1 and the transition chamber 2 to avoid direct contact between the test personnel and the harmful gas. Specifically, in the first state, the rod 51 places the end 52 and the adsorbent material and the gas volatilization source thereon in the test chamber 1 for adsorption test; after the adsorption test, in the second state, the rod 51 takes out the adsorbent material after the adsorption test through the end 52 and places it in the transition chamber 2 for static. During the static process, since the adsorbent material is arranged on the inner wall of the transition chamber 2, the harmful gas overflowed from the adsorbent material can be purified, thereby avoiding direct contact between the test personnel and the harmful gas. Preferably, the transport assembly 5 further includes a handle 53 for the test personnel to hold, so that the test personnel can push or pull the rod 51 and the end 52 through the handle 53 in an external environment.

[0053] The structure of the end portion 52 includes:

[0054] Embodiment 1:

[0055] like Figure 4 As shown, as a preferred embodiment, the end portion 52 is in the shape of a clamp, including a left clamp 521 and a right clamp 522. The left clamp 521 and the right clamp 522 form an arc shape with a notch, which is used to clamp a container with adsorption materials or a container with a gas volatilization source.

[0056] Embodiment 2:

[0057] like Figure 5 As shown, as a preferred embodiment, the end portion 52 is in the shape of a tray or a shovel, which can directly hold up or shovel up a container with an adsorbent material or a container with a gas volatilization source.

[0058] Through the above structural design, when it is necessary to test the adsorption capacity of the adsorbent material, a certain amount of gas volatilization source and adsorbent material are fixed at the end 52 of the conveying component 5 when the first closed door 21 is closed, the first closed door 21 is opened, and the end 52 and the gas volatilization source and adsorbent material thereon are transported to the test chamber 1 by slowly pushing the rod 51, and the conveying component 5 is pulled back and the first closed door 21 is closed, so that the test chamber 1 is in a closed state to perform the adsorption test of the adsorbent material. After a certain period of adsorption, the first closed door 21 is opened, and the adsorbent material after adsorption is taken out to the transition chamber 2 by pushing and pulling back the end 52 again, and is left to stand for a period of time. The harmful gas that is not adsorbed and leaked into the transition chamber 2 is purified by the adsorbent material on the inner wall of the transition chamber 2, and then weighed and the adsorption amount is calculated. Repeat the above steps until the mass of the adsorbent material increases to a constant value, at which time the increase in the mass of the adsorbent material is the static saturated adsorption capacity of the adsorbent material for the specific harmful gas. Based on the isolation control of the transition chamber 2 and the test chamber 1, the static / buffering design of the transition chamber 2, and the conveying control of the conveying component 5, the device can effectively avoid the overflow of harmful gases and reduce potential hazards to test personnel; at the same time, the static adsorption capacity of the adsorption material can be accurately measured under safe conditions.

[0059] In some preferred embodiments, a heating belt and a temperature control device are provided on the inner wall of the test chamber 1 to accurately control the indoor temperature of the test chamber 1. Through the heating belt and the temperature control device, the temperature of the test chamber 1 can be controlled to a desired temperature, preferably 15-200° C. Preferably, the temperature control accuracy of the temperature control device can reach ±1° C.

[0060] In some preferred embodiments, the outer wall of the test chamber 1 is made of a heat-insulating material, which can effectively maintain the indoor temperature of the test chamber 1. Preferably, the heat-insulating material is glass wool, rock wool, plant fiberboard, etc.

[0061] In some preferred embodiments, a test table 4 is provided in the test chamber 1 for placing a gas volatilization source and an adsorption material container.

[0062] In some preferred embodiments, a timer is also provided on the outer wall of the test chamber 1 for counting the time of the adsorption test, and the timing function is realized by setting the timer. Preferably, the timer is an electronic stopwatch.

[0063] In some preferred embodiments, a manual button and a solenoid valve are provided on the outer wall of the transition chamber 2 to control the opening and closing of the first closed door 21. The solenoid valve is opened or closed by the manual button, and the opening and closing of the first closed door 21 is then controlled by the solenoid valve.

[0064] In some preferred embodiments, a second closed door 3 is provided on the wall of the transition chamber 2 parallel to the wall 22, and the transition chamber 2 is connected or isolated from the outside environment by opening and closing the second closed door 3. An opening is provided on the second closed door 3, and the rod 51 of the transport assembly 5 passes through the opening. One end of the rod 51 is located in the outside space for the test personnel to grasp, thereby operating the push and pull operation of the rod 51; the other end of the rod 51 is connected to the end 52.

[0065] In some preferred embodiments, the adsorption material on the inner wall of the transition chamber 2 is a consumable material. After a certain period of testing (depending on the frequency of use), the material is removed from the device and new adsorption material is installed to ensure that the harmful gases diffused from the sample measurement chamber to the transition chamber can be effectively adsorbed, thereby effectively protecting the health and safety of the experimenters.

[0066] like Figure 6 As shown, the detection method provided by the embodiment of the present invention specifically includes the following steps:

[0067] Sample placement step S1: includes sample fixing step S11, sample transporting step S12 and rod removal step S13.

[0068] Sample fixing step S11: pull the rod 51 of the transport assembly 5, place the end 52 in the transition chamber 2, close the first closed door 21, open the second closed door 3, fix a certain amount of harmful gas volatilization source and adsorption material sample at the end 52, and close the second closed door 3.

[0069] Sample transport step S12: Open the first closed door 21 controlled by the electromagnetic valve by manually pressing a button, and move the harmful gas volatilization source and the adsorption material sample to the test table 4 in the test chamber 1 by pushing the rod 51 of the transport assembly 5 .

[0070] Rod withdrawal step S13: by pulling the rod portion 51 of the conveying assembly 5 , the end portion 52 of the conveying assembly and the rod portion 51 are withdrawn from the testing chamber 1 , and the first closed door 21 is closed.

[0071] Temperature adjustment and test step S2: The temperature of the test chamber 1 is adjusted to a specified temperature by means of a heating belt and a temperature control device in the test chamber 1, and the adsorption test is started and timed by means of a timer.

[0072] Standing step S3: After a certain period of adsorption, open the first closed door 21 by manually pressing a button, operate the transport component 5 to move to the test chamber 1 and take out the adsorption material sample, move the adsorption material sample to the transition chamber 2, close the first closed door 21, and stand for a period of time.

[0073] Weighing step S4: After a certain period of time, when the harmful gases in the transition chamber 2 are completely adsorbed by the adsorption material and the unadsorbed harmful gases are adsorbed by the adsorption material on the inner wall of the transition chamber 2, the second closed door 3 is opened, the adsorption material sample is taken out, and weighed.

[0074] Confirmation step S5: Repeat S1-S6 until the weight of the adsorbent sample increases to a constant value. When the weight of the adsorbent sample increases to a constant value, proceed to calculation step S8.

[0075] Calculation step S6: Calculate the static saturated adsorption capacity of the adsorption material sample for specific harmful gases.

[0076] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A device for testing the adsorption capacity of a gas purification material, characterized in that: It comprises a test chamber (1) and a transition chamber (2) which are adjacent to each other and together form a closed space, and a transport component (5); A first closed door (21) is provided between the test chamber (1) and the transition chamber (2), and the test chamber (1) is connected to or isolated from the transition chamber (2) by opening and closing the first closed door (21); The transport component (5) comprises a rod portion (51) and an end portion (52) connected to each other, wherein the rod portion (51) is used to transfer the end portion (52) and the adsorption material sample placed thereon between the test chamber (1) and the transition chamber (2) by its own movement; in a first state, the adsorption material sample and the gas volatilization source are placed in the test chamber (1) along with the end portion (52) to perform an adsorption test; in a second state, the adsorption material sample after the adsorption test is placed in the transition chamber (2) along with the end portion (52) to stand still, and adsorption material is arranged on the inner wall of the transition chamber (2) to purify the gas overflowed from the adsorption material during the standing process.

2. The gas purification material adsorption capacity testing device according to claim 1, characterized in that: A manual button and a solenoid valve are arranged on the outer wall of the transition chamber (2) for controlling the opening and closing of the first closed door (21).

3. The gas purification material adsorption capacity testing device according to claim 2, characterized in that: A second closed door (3) is also provided on the wall of the transition chamber (2), and the transition chamber (2) is connected to or isolated from the external environment by opening and closing the second closed door (3).

4. The gas purification material adsorption capacity testing device according to claim 3, characterized in that: The second closed door (3) is provided with an opening for the rod portion (51) of the conveying assembly (5) to pass through.

5. The device for testing the adsorption capacity of gas purification materials according to claim 1, characterized in that: The adsorption material on the inner wall of the test chamber (1) is one or more of activated carbon fibers, mesoporous materials, silica gel, molecular sieves, and alumina.

6. The device for testing the adsorption capacity of gas purification materials according to claim 1, characterized in that: A heating belt and a temperature control device are arranged on the inner wall of the test chamber (1) for controlling the indoor temperature.

7. The device for testing the adsorption capacity of gas purification materials according to claim 6, characterized in that: The indoor temperature ranges from 15 to 200°C.

8. The device for testing the adsorption capacity of a gas purification material according to any one of claims 1 to 7, characterized in that: The outer wall of the test chamber (1) is made of a heat-insulating material to maintain the indoor temperature of the test chamber (1).

9. The device for testing the adsorption capacity of gas purification materials according to claim 8, characterized in that: The thermal insulation material is one or more of glass wool, rock wool and plant fiberboard.

10. The device for testing the adsorption capacity of a gas purification material according to any one of claims 1 to 7, characterized in that: A timer is arranged on the outer wall of the test chamber (1) for counting the time of the adsorption test.

11. The device for testing the adsorption capacity of gas purification materials according to claim 10, characterized in that: The timer is an electronic stopwatch.

12. The device for testing the adsorption capacity of a gas purification material according to any one of claims 1 to 7, characterized in that: The test chamber (1) is also provided with a test table (4) for placing the adsorption material and the gas volatilization source.

13. The device for testing the adsorption capacity of a gas purification material according to any one of claims 1 to 7, characterized in that: The transport device (5) further comprises a handle (53) for external test personnel to control the movement of the transport device (5).

14. A method for testing the adsorption capacity of a gas purification material using the gas purification material adsorption capacity testing device according to any one of claims 1 to 13, characterized in that: The steps include: Step S1: placing a certain amount of the gas volatilization source and the adsorption material sample in the test chamber (1); Step S2: adjusting the indoor temperature to a specified temperature by means of a heating belt and a temperature control device in the test chamber (1) and starting an adsorption test; Step S3: placing the adsorption material sample after the adsorption test in the transition chamber (2) to stand still; Step S4: taking out the adsorption material sample after standing still and weighing it; Step S5: repeating S1-S6 until the weight of the adsorbent sample increases to a constant value; Step S6: Calculate the adsorption capacity of the adsorption material sample.

15. The testing method according to claim 14, characterized in that: The step S1 includes a step S11, pulling the rod (51) of the transport component (5), placing the end (52) in the transition chamber (2), and fixing the gas volatilization source and the adsorption material sample on the end (52).

16. The testing method according to claim 14, characterized in that: The step S1 includes a step S12, wherein the end portion (52) and the adsorption material sample and the gas volatilization source thereon are placed in the test chamber (1) by pushing the rod portion (51) of the transport component (5).

17. The testing method according to claim 14, characterized in that: The step S1 includes a step S13, in which the end portion (52) and the rod portion (51) are withdrawn from the test chamber (1) by pulling the rod portion (51) of the transport assembly (5), and the first closed door (21) is closed.

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