CN216816952U - Experiment bin for simulating and measuring radon precipitation environment of building materials - Google Patents

Abstract

The utility model discloses a building material radon precipitation environment simulation and measurement experiment bin which comprises a test section and a ventilation pipe which are mutually communicated, wherein the test section and the ventilation pipe form a closed ventilation loop, and at least one of the wind speed, the temperature and the humidity in the ventilation loop is adjustable; the test section comprises a sample bin for placing a test piece, and radon gas separated out from the test piece is gathered in the vent pipe; the test section is also connected with a radon detector for detecting radon gas in the ventilation pipe.

Description

Experiment bin for simulating and measuring radon precipitation environment of building materials

Technical Field

The utility model relates to the technical field of gas concentration measuring equipment, in particular to a radon precipitation environment simulation and measurement experiment bin for building materials.

Background

In daily life, radon and radon daughter are the main natural radioactive sources harmful to human health. Radon has great threat to human health, strong carcinogenicity and wide pollution sources, such as soil, rock mass, underground water, building materials and the like, wherein the main sources closely related to human life are radon released by underground engineering or roadway excavation surrounding rock mass, indoor wall, foundation, building materials and the like.

In modern houses, building wall materials are one of main sources of indoor radon pollution radiation, under the pressure of environmental protection, industrial waste residues are increasingly used in the building material industry, most building materials with high radioactivity content are caused by doping industrial waste materials, and the harm of indoor radon precipitation to human bodies cannot be ignored.

Through research on radon migration law, in various measures for reducing radon concentration, there are methods for reducing radon precipitation on the surface of a radon source by using a radon-proof coating, but the most used method is still a ventilation radon discharge method in underground engineering excavation and high-rise building residences, and the method is economic and easy to implement. Therefore, the radon precipitation law of the radon source in different flow fields and temperature fields is particularly important, and a related measuring device under the environment of coupling the temperature field and the flow field is still lacked, so that great inconvenience is brought to the research on the migration law of radon in the environment of coupling the temperature field and the flow field.

In summary, how to provide a radon precipitation measuring device for realizing radon sources in different temperature fields and flow field coupling environments is a problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a building material radon precipitation environment simulation and measurement experiment chamber which can simulate a radon precipitation state of a building material in a natural environment and measure the radon precipitation rate of the building material.

In order to achieve the purpose, the utility model provides a building material radon precipitation environment simulation and measurement experiment bin which comprises a test section and a ventilation pipe which are communicated with each other, wherein the test section and the ventilation pipe form a closed ventilation loop, and at least one of the wind speed, the temperature and the humidity in the ventilation loop is adjustable; the test section comprises a sample bin for placing a test piece, and radon gas separated out from the test piece is gathered in the vent pipe; the test section is also connected with a radon detector for detecting radon gas in the ventilation pipe.

Optionally, the test section includes a radon collecting space located above the sample chamber, the radon collecting space includes an experimental chamber body, and two ends of the experimental chamber body are respectively communicated with the ventilation pipe.

Optionally, the sample chamber comprises a heating plate and a heat insulation plate located outside the heating plate, the heating plate is surrounded to form a cavity with an upper opening, and the heating plate is used for being attached to the rest surfaces except the upper surface of the test piece.

Optionally, the radon collecting space further comprises two radon measuring holes formed in the side wall of the experimental chamber, and the radon measuring instrument is respectively communicated with the two radon measuring holes through a radon gas input pipe and a radon gas output pipe.

Optionally, the lower surface of the experimental cabin body is provided with an analysis outlet with the same size as the upper opening of the cavity.

Optionally, the side wall of the experimental bin body is further provided with a temperature measuring hole, a humidity measuring hole and an air speed measuring hole, a temperature probe is arranged in the temperature measuring hole, a humidity probe is arranged in the humidity measuring hole, an air speed probe is arranged in the air speed measuring hole, and the temperature probe, the humidity probe and the air speed probe are connected with the temperature-humidity air speed measuring instrument.

Optionally, the ventilation pipe includes the power section, the section of effluenting, the shrink section, first stable section, the honeycomb ware, the second stable section, diffusion section and the backward flow section that communicate in proper order, and wherein, the both ends of power section communicate respectively the section of effluenting and the backward flow section, and are equipped with the test section between honeycomb ware and the second stable section.

Optionally, a stepless variable frequency speed-adjustable fan is arranged in the power section.

Optionally, the outflow section is made of PVC, the contraction section is made of stainless steel, the first stabilizing section and the second stabilizing section are both made of acrylic, and the honeycomb device is specifically a stainless steel honeycomb device.

Optionally, a dryer is arranged between the test section and the emanometer, so that the gas dried by the dryer enters the emanometer.

Compared with the background technology, the building material radon precipitation environment simulation and measurement experiment bin comprises the experiment section and the ventilation pipe which are communicated with each other, wherein the experiment section and the ventilation pipe form a closed ventilation loop, and at least one of the wind speed, the temperature and the humidity in the ventilation loop is adjustable; the test section comprises a sample bin for placing a test piece, and radon gas separated out from the test piece is gathered in the vent pipe; the test section is also connected with a radon detector for detecting radon gas in the ventilation pipe; the experimental chamber for simulating and measuring radon precipitation environment of building materials adopts a closed backflow design, and realizes a stable and high-uniformity flow field environment by using aerodynamics and wind tunnel design principles. Because the radon precipitation migration rule of the building materials is also influenced by temperature and humidity, at least one function of adjusting wind speed, temperature and humidity is added in the measuring device, so that the radon precipitation rate of the building materials in different temperature field and flow field environments can be measured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a top view of a radon exhalation environment simulation and measurement experiment chamber for building materials provided by an embodiment of the present invention;

fig. 2 is a front view of a test section of the building material radon exhalation environment simulation and measurement test chamber provided by the embodiment of the utility model.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order that those skilled in the art will better understand the disclosure, the utility model will be described in further detail with reference to the accompanying drawings and specific embodiments.

The experimental chamber for simulating and measuring radon evolution environment for building materials provided by the embodiment of the application is shown in the attached drawings 1 and 2 in the specification, and mainly comprises a test section and a ventilation pipe which are mutually communicated, and further comprises a radon meter connected with the test section. The test section and the ventilation pipe form a closed ventilation loop, and at least one of the wind speed, the temperature and the humidity in the ventilation loop is adjustable to simulate the radon precipitation amount of the test piece 19 in the environment. The test section comprises a sample bin for placing a test piece, radon evolved gas of the test piece is gathered in the ventilation pipe, and the radon evolved gas in the ventilation pipe can be detected by using the radon detector 18.

The applicant finds that the radon exhalation rate is increased and the indoor radon concentration is obviously increased because the industrial waste residues are widely used in building materials; the research on the radon precipitation migration rule of the building materials has important significance on the prevention and control of indoor radon concentration, the radon precipitation rate measurement of the building materials needs to be carried out in a closed space, and no equipment capable of realizing a stable and high-uniformity flow field environment exists, so that inconvenience is brought to the research on the radon precipitation migration rule of the building materials in different flow fields.

Based on the problems, the radon precipitation environment simulation and measurement experiment bin for the building materials adopts a closed design and utilizes the fluid mechanics knowledge and the wind tunnel principle, so that a stable and high-uniformity flow field environment is realized. Because the radon precipitation migration rule of the building materials is also influenced by temperature and humidity, the measuring device is additionally provided with a measuring function of adjusting the temperature and the humidity of the environment where the test piece is positioned. In conclusion, the measuring device is used for measuring the radon exhalation rate of the building material under different temperature field and flow field environments.

The ventilation pipe can comprise a power section 1, an outflow section 2, a contraction section 3, a first stabilizing section 4, a honeycomb device 5, a second stabilizing section 22, a diffusion section 23 and a backflow section 24; because the radon is measured by an accumulation method in a closed space, the device forms a closed ventilation loop with the test section through the ventilation pipe, and the radon separated out from the test piece can be accumulated and measured in the ventilation loop.

One end of the power section 1 is sequentially connected with an outflow section 2, a contraction section 3, a first stabilizing section 4 and an experimental cabin body 6 in a sealing manner. The power section 1 adopts a stepless variable frequency speed-adjustable pipeline fan, and can meet the requirements of different wind speeds, so that radon precipitation of building materials in different flow field environments can be simulated.

Since the indoor wind speed is 0.1-0.7m/s, a duct fan of 0.1-1.0m/s is preferable in consideration of energy loss. The wind flow generated by the power section 1 flows through the outflow section 2 to the contraction section 3. The main function of the constriction 3 is to accelerate the gas flow to the desired speed and to improve the uniformity of the gas flow and suitably reduce its turbulence intensity. The first stabilizing section 4 serves to improve the uniformity of the gas flow and to reduce its turbulence intensity. A honeycomb device 5 is arranged in the end of the pipeline of the first stable section 4 and used for improving the uniformity of the flow field of the experimental section. According to the aerodynamic and wind tunnel design principle, the stability and uniformity of airflow in the pipeline are improved by utilizing the contraction section 3, the first stabilizing section 4 and the honeycomb device 5, so that a stable and high-uniformity flow field environment is realized.

The other end of the power section 1 is sequentially connected with a backflow section 24, a diffusion section 23, a second stabilizing section 22 and an experimental cabin body 6 in a sealing manner. The wind flow reaches the diffuser section 23 after flowing through the experimental cabin body 6 and the second stabilizing section 22, and the diffuser section 5 mainly functions to convert the kinetic energy of the wind flow into pressure energy so as to reduce the energy loss of the wind tunnel. Finally flows back to the power section 1 through the backflow section 24; the two ends of the experimental cabin body 6 are hermetically connected with the first stabilizing section 4 and the second stabilizing section 22.

The test section comprises a radon collecting space and a sample bin, wherein the radon collecting space is arranged above the sample bin. The radon collecting space comprises an experimental bin body 6, a first radon measuring hole 7, a second radon measuring hole 11, a temperature measuring hole 8, a humidity measuring hole 9 and a wind speed measuring hole 10.

Be used for placing test piece 19 in the sample storehouse, the sample storehouse includes hot plate 20 and the heat insulating board 21 that is located the hot plate outside, and hot plate 20 encloses to establish and forms the cavity that has the top open-ended, and test piece 19 then places in the cavity, and hot plate 20 is used for laminating with the rest surfaces except that the upper surface in the test piece. The lower surface of the experimental cabin body 6 is provided with an analysis outlet which has the same size with the upper opening of the cavity.

Here the test piece 19, i.e. the building material to be tested. Except that the upper surface of the test piece 19 is exposed on the lower surface of the experimental cabin body 6, other five surfaces are all in close contact with the heating plate 20, and the upper surface of the test piece 19 is flush with the lower surface of the experimental cabin body 6, so that radon precipitation of a certain surface of a building material in different environments can be truly simulated.

The heat insulation plate 21 is arranged on the inner side of the sample bin shell, so that the constant temperature in the sample bin shell can be ensured, and the influence of temperature change is avoided. On the inside of the heat shield 21 a heating plate 20 is arranged, which enables different temperature fields to be achieved by adjusting the temperature inside the measuring device housing. The heating plate 20 and the heat insulation plate 21 are arranged in the experimental section, so that the function of adjusting the temperature of the environment where the test piece is located is realized, and radon precipitation of building materials in different temperature field environments is simulated.

Two ends of the experimental cabin body 6 are hermetically connected with the first stabilizing section 4 and the second stabilizing section 22 to serve as an experimental center for realizing a flow field environment. The lower surface of the experimental chamber body 6 is provided with a rectangular opening with the same size as the test piece 19 for receiving radon precipitation of the test piece 19 in the device. The fluid flows over the upper surface of the test piece 19 and radon gas evolved by the test piece 19 accumulates in the tubing of the measuring device. A first radon measuring hole 7, a second radon measuring hole 11, a temperature measuring hole 8, a humidity measuring hole 9 and a wind speed measuring hole 10 are uniformly arranged on the upper surface of the experimental cabin body 6. As an access port for the measurement system.

The measuring system comprises a radon gas input pipe 12, a radon gas output pipe 16, a radon measuring instrument 18, a temperature probe 13, a humidity probe 14, an air speed probe 15 and a temperature-humidity air speed measuring instrument 17; the first radon measuring hole 7 is sequentially connected with a radon gas input pipe 12, a radon measuring instrument 18, a radon gas output pipe 16 and a second radon measuring hole 11 in a sealing manner, and the radon exhalation rate of a test piece in the device is measured by using the radon measuring instrument 18. The temperature measuring hole 8, the humidity measuring hole 9 and the wind speed measuring hole 10 are respectively provided with a temperature probe 13, a humidity probe 14 and a wind speed probe 15. The temperature probe 13, the humidity probe 14 and the wind speed probe 15 are connected with a temperature-humidity wind speed measuring instrument 17 together and are used for measuring the temperature, the humidity and the wind speed of the environment where a test piece in the device is located.

As described above, because the radon measurement is carried out by an accumulation method and needs to be carried out in a closed space, the device forms a closed ventilation loop with the test section through the ventilation pipe, so that the radon precipitated from the test piece can be accumulated and measured in the ventilation loop.

Specifically, one end of the power section 1 is sequentially connected with an outflow section 2, a contraction section 3, a first stabilizing section 4 and an experimental cabin body 6 in a sealing manner. The power section 1 adopts a stepless variable frequency speed-adjustable fan, the model of the fan is HF-150 PE (6 inches), the voltage is 100-240V, the current is 0.47-0.94A, the power is 70W, the rotating speed is 3000RPM, and the air quantity is 647m³The wind pressure is 503Pa, the weight is 2.7KG, the caliber of the connecting pipe is 160mm, the requirements of different wind speeds can be met, and radon precipitation of the building material in different flow field environments can be simulated.

As the indoor wind speed is 0.1-0.7m/s, under the condition of considering energy loss, a pipeline fan of 0.1-1.0m/s is preferred, and the pipeline fan can meet the wind speed regulation requirement of 0.1-1.0 m/s.

The wind flow generated by the power section 1 flows through the outflow section 2 to the contraction section 3.

The outflow section 2 is formed by assembling pvc water supply pipes, one end of each of which is 800mm, 160mm and 4.2mm thick is connected with the fan of the power section 1, and the other end of each of which is connected with a pvc 90-degree elbow with the inner diameter of 160 mm. The other end of the pvc90 degree elbow is connected with a pvc water supply pipe with the length of 400mm, the length of 160mm and the thickness of 4.2 mm. The other end of the pvc water supply pipe is connected with a pvc 90-degree elbow with the inner diameter of 160 mm. The other end of the pvc90 degree elbow is connected with a pvc water supply pipe with the thickness of 400mm, 160mm and 4.2 mm. Thus constituting the entire outflow section 2.

The main function of the constriction 3 is to accelerate the gas flow to the desired speed and to improve the uniformity of the gas flow and to suitably reduce its turbulence intensity. The contraction section 3 adopts a circular pipeline with one end of 160mm of inner diameter and 1mm of thickness, and a rectangular pipeline with the other end of 120mm of length and 100mm of width and the total length of 200 mm. The material is stainless steel.

The first stabilizing section 4 serves to improve the uniformity of the gas flow and to reduce its turbulence intensity. The first stable section 4 is a cuboid ventilation pipeline which is formed by sealing and assembling acrylic plates and has the length of 200mm, the width of 120mm and the height of 100mm, and the wall thickness is 2 mm. A honeycombed device 5 is arranged in the tail end of the pipeline of the first stabilizing section 4 and used for improving the uniformity of a flow field of an experimental section, and the honeycombed device is a stainless steel honeycombed device with the length of 116mm, the width of 96mm and the aperture of 10 mm. According to the aerodynamic and wind tunnel design principle, the stability and uniformity of airflow in the pipeline are improved by utilizing the contraction section 3, the first stabilizing section 4 and the honeycomb device 5, so that a stable and high-uniformity flow field environment is realized.

The other end of the power section 1 is sequentially connected with a backflow section 24, a diffusion section 23, a second stabilizing section 22 and an experimental cabin body 6 in a sealing manner. The wind flow passes through the experimental cabin body 6 and the second stabilizing section 22 and then reaches the diffuser section 23. The second stable section 22 is a cuboid ventilation duct which is formed by sealing and assembling acrylic plates, is 200mm long, 120mm wide and 100mm high, and has the wall thickness of 2 mm. The reflux section 24 is assembled by pvc water supply pipes, one end of each of which is 800mm, 160mm and 4.2mm thick is connected with the fan of the power section 1, and the other end is connected with a pvc 90-degree elbow with the inner diameter of 160 mm. The other end of the pvc90 degree elbow is connected with a pvc water supply pipe with the length of 400mm, the length of 160mm and the thickness of 4.2 mm. The other end of the pvc water supply pipe is connected with a pvc 90-degree elbow with the inner diameter of 160 mm. The other end of the pvc90 degree elbow is connected with a pvc water supply pipe with the thickness of 400mm, 160mm and 4.2 mm. Thereby forming the entire return section 24. The main function of the diffuser section 23 is to convert the kinetic energy of the air flow into pressure energy to reduce the energy loss of the wind tunnel. The diffuser section 23 adopts a circular pipeline with one end having an inner diameter of 160mm and a thickness of 1mm, and a rectangular pipeline with the other end having a length of 120mm and a width of 100mm, and the total length of the pipeline is 200 mm. The material is stainless steel. And finally flows back to the power section 1 through the return section 24.

The two ends of the experimental cabin body 6 are hermetically connected with the first stabilizing section 4 and the second stabilizing section 22.

The test section consists of a radon collecting space and a sample bin, wherein the radon collecting space is arranged above the sample bin. The radon collecting space consists of an experimental bin body 6, a first radon measuring hole 7, a second radon measuring hole 11, a temperature measuring hole 8, a humidity measuring hole 9 and a wind speed measuring hole 10.

The sample chamber is mainly used for placing a test piece 19, namely a building material to be tested. The sample chamber adopts a cuboid container which is formed by sealing an acrylic plate and has the length of 400mm, the width of 120mm and the height of 200mm, and the upper surface of the cuboid container is communicated with a radon collecting space. Except that the upper surface of the test piece 19 is exposed on the lower surface of the experimental cabin body 6, other five surfaces of the test piece 19 are all in close contact with the heating plate 20, and the upper surface of the test piece 19 is flush with the lower surface of the experimental cabin body 6, so that radon precipitation of a certain surface of a building material in different environments is truly simulated.

The heat insulation plate 21 is arranged on the inner side of the sample bin shell, so that the constant temperature in the sample bin shell can be ensured, and the influence of temperature change is avoided. The thickness of the heat insulation plate 21 is set to be 2mm, and the heat insulation plate is made of elastic materials, so that heat insulation and sealing effects are achieved, and radon on the upper surface of the test piece 19 is completely separated out to a radon collecting space. On the inside of the heat shield 21 a heating plate 20 is arranged, which enables different temperature fields to be achieved by adjusting the temperature inside the measuring device housing.

The heating plate 20 is a customized elastic silicon rubber rectangular heating plate with the thickness of 3mm, and plays a role in constant temperature heating, the heating plate 20 is directly contacted with the test piece 19, and the temperature of the test piece 19 is controlled by an external temperature control system, so that on one hand, the temperature of the test piece 19 is ensured to be constant, and the influence of temperature change on the radon exhalation rate is eliminated; and on the other hand, measuring the influence of different temperatures on the radon exhalation rate of the building materials.

The heating plate 20 and the heat insulation plate 21 can both be made of elastic materials, so that the temperature of the environment where the test piece 19 is located can be ensured to be constant all the time in the measuring process, the error of the experimental result caused by the external environment change in the measuring process is eliminated, the radon is ensured to be separated out from the single surface of the upper surface of the test piece 19, and the accuracy of the measuring result is improved. The heating plate 20 and the heat insulation plate 21 are arranged in the experimental section, so that the function of adjusting the temperature of the environment where the test piece is located is realized, and radon precipitation of building materials in different temperature field environments is simulated.

Two ends of the experimental cabin body 6 are hermetically connected with the first stabilizing section 4 and the second stabilizing section 22 to serve as an experimental center for realizing a flow field environment. The experimental cabin body 6 adopts a cuboid ventilation pipeline which is formed by sealing acrylic plates and has the length of 400mm, the width of 120mm and the height of 100mm, and the wall thickness is 2 mm. The lower surface of the experimental bin body 6 is provided with a rectangular opening with the same size as the test piece 19, and the rectangular opening is used for receiving radon precipitation of the test piece 19 in the device.

The fluid flows through the upper surface of the test piece 19, and radon gas separated out by the test piece 19 is accumulated in a pipeline of the measuring device; first emanometer hole 7, second emanometer hole 11, temperature measuring hole 8, humidity measuring hole 9, wind speed measuring hole 10 have evenly arranged at the upper surface in laboratory storehouse body 6, as measurement system's access mouth, and the aperture size is 8 mm.

The measuring system consists of a radon gas input pipe 12, a radon gas output pipe 16, a radon measuring instrument 18, a temperature probe 13, a humidity probe 14, an air speed probe 15 and a temperature-humidity air speed measuring instrument 17.

The first radon measuring hole 7 is sequentially connected with a radon gas input pipe 12, a radon measuring instrument 18, a radon gas output pipe 16 and a second radon measuring hole 11 in a sealing manner and is used for measuring the radon exhalation rate of a test piece in the device. The measuring device adopts an RAD-7 emanometer as the emanometer 18. The principle of the radon measuring instrument is to measure the content of radon and radon daughter in unit volume, namely, the radon concentration in the measuring device.

The radon collection tube, namely the radon input tube 12 and the radon output tube 16, is mainly set according to the size of the air inlet or the air outlet of the radon measuring instrument, specifically, a rubber air guide tube can be selected, and the set diameter is slightly smaller than 8mm, so that the air tightness of the air guide tube when the air guide tube is inserted into the first radon measuring hole 7 and the second radon measuring hole 11 is ensured.

The embodiment can also be provided with a dryer which is mainly used for drying radon (gas) to be introduced into the radon measuring instrument through the radon gas input tube 12, so that the damage to the radon measuring instrument is reduced, and the accuracy of the measuring result is ensured.

The temperature measuring hole 8, the humidity measuring hole 9 and the wind speed measuring hole 10 are respectively provided with a temperature probe 13, a humidity probe 14 and a wind speed probe 15. The temperature probe 13, the humidity probe 14 and the wind speed probe 15 are connected with a temperature-humidity wind speed measuring instrument 17. The temperature and humidity measuring instrument adopts a GPRS temperature and humidity recorder, the temperature range is-40-80 ℃, the temperature precision is +/-0.3 ℃ (25 ℃), the temperature range appearing in daily life is covered, and the requirement of experimental measurement is met. The humidity range is 0-100% RH, and the humidity precision is + -2% RH (60% 25 deg.C). The wind speed measuring instrument adopts a Japanese three-quantity heat-sensitive anemometer, the wind speed measuring range is 0.0-30.0m/s, the resolution is 0.01m/s, and the precision is +/-3% +/-0.1. The measuring range covers the wind speed design value range.

Therefore, the radon exhalation rate measuring device provided by the embodiment at least has the following advantages: the method is suitable for measuring the radon with low concentration, and has high precision and small error; the radon exhalation rate of building materials can be measured; by controlling the wind speed, the influence of the wind speed gradient on the radon releasing rate of the radon source can be detected; by controlling the temperature of the heating plate, the influence of the temperature gradient on the radon releasing rate of the radon source can be detected.

It should be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The radon precipitation environment simulation and measurement experiment bin for building materials provided by the utility model is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (10)

1. The experimental chamber for simulating and measuring radon precipitation environment as building materials is characterized by comprising a test section and a ventilation pipe which are communicated with each other, wherein the test section and the ventilation pipe form a closed ventilation loop, and at least one of the wind speed, the temperature and the humidity in the ventilation loop is adjustable; the test section comprises a sample bin for placing a test piece, and radon evolved gas of the test piece is gathered in the ventilation pipe; the test section is also connected with a radon detector for detecting radon gas in the ventilation pipe.

2. The building material radon exhalation environment simulation and measurement experiment chamber as claimed in claim 1, wherein said experiment section comprises a radon collection space above said sample chamber, said radon collection space comprises an experiment chamber body, and both ends of said experiment chamber body are respectively communicated with said ventilation pipe.

3. The building material radon exhalation environment simulation and measurement experiment chamber as claimed in claim 2, wherein the sample chamber comprises a heating plate and a heat insulation plate located outside the heating plate, the heating plate is enclosed to form a cavity with an upper opening, and the heating plate is used to fit with the rest surfaces except the upper surface of the test piece.

4. The building material radon exhalation environment simulation and measurement experiment chamber as claimed in claim 2, wherein the radon collection space further comprises two radon measurement holes opened in the side wall of the experiment chamber, and the radon measurement instrument is respectively connected to the two radon measurement holes through a radon gas input pipe and a radon gas output pipe.

5. The building material radon exhalation environment simulation and measurement experiment chamber as claimed in claim 3, wherein the lower surface of the experiment chamber body is provided with an exhalation opening with a size consistent with that of the upper opening of the chamber body.

6. The building material radon exhalation environment simulation and measurement experiment chamber as claimed in claim 2, wherein the side wall of the experiment chamber body is further provided with a temperature measuring hole, a humidity measuring hole and an air speed measuring hole, the temperature measuring hole is provided with a temperature probe, the humidity measuring hole is provided with a humidity probe, the air speed measuring hole is provided with an air speed probe, and the temperature probe, the humidity probe and the air speed probe are connected with a warm-wet air speed measuring instrument.

7. The building material radon exhalation environment simulation and measurement experiment bin as claimed in any one of claims 1 to 6, wherein the ventilation pipe comprises a power section, an outflow section, a contraction section, a first stabilization section, a honeycomb device, a second stabilization section, a diffusion section and a backflow section which are sequentially communicated, wherein two ends of the power section are respectively communicated with the outflow section and the backflow section, and the experiment section is arranged between the honeycomb device and the second stabilization section.

8. The building material radon exhalation environment simulation and measurement experiment bin of claim 7, wherein a stepless variable frequency speed-adjustable fan is arranged in the power section.

9. The building material radon exhalation environment simulation and measurement experiment bin of claim 7, wherein the outflow section is made of PVC, the contraction section is made of stainless steel, the first stabilizing section and the second stabilizing section are both made of acrylic, and the honeycomb device is specifically a stainless steel honeycomb device.

10. The building material radon exhalation environment simulation and measurement experiment chamber as claimed in any one of claims 1 to 6, further comprising a dryer disposed between said experiment section and said radon meter, so that the gas dried by said dryer enters said radon meter.

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