Environment-friendly material toxic substance volatilization detection equipment

Abstract

The invention discloses environment-friendly material toxic substance volatilization detection equipment, and relates to the field of gas detection. The volatilization cylinder body is arranged on the mounting frame, a first piston is arranged in the volatilization cylinder body in a sliding mode, an electric push rod is arranged on the mounting frame and used for driving the first piston to move in the volatilization cylinder body, and a material bin communicated with the volatilization cylinder body is arranged in the first piston and used for containing materials needing to be detected. The device has the beneficial effects that the volatilization cylinder body is arranged for material volatilization, the first piston is pushed through the electric push rod, so that the first piston pushes gas in the volatilization cylinder body into the detection cylinder body through the gas stirring assembly, and the gas can push the impeller in the process of passing through the gas stirring assembly, so that the stirring paddle is driven to rotate; the gas in the detection cylinder body is stirred by the stirring paddle, so that a gas sample is uniformly mixed, the influence on detection due to the problem of non-uniform gas is avoided, and the detection accuracy is further ensured.

Description

Technical Field

[0001] The invention relates to the technical field of gas detection, and in particular to a volatilization detection device for toxic substances in environmentally friendly materials. Background Art

[0002] VOC refers to volatile organic compounds, which are harmful volatile organic compounds, such as formaldehyde. As people pay more and more attention to environmental protection and health, environmentally friendly materials are used more and more widely. However, some environmentally friendly materials may volatilize toxic substances during use, so each material needs to be tested for toxic volatilization before it is put into use.

[0003] In the prior art, the material to be tested and the gas sensor are usually placed in a closed test box. A heater is generally provided in the test box to promote the volatilization of the material and test the volatilization of the material at different temperatures. After the test is completed, one type of test equipment directly opens the test box without recovering the gas sample, causing the gas sample to drift into the environment and cause pollution. The other type uses a vacuum pump to recover the gas sample in the test box into a cylinder or purification equipment. However, when the gas sample is recovered, a near-vacuum environment is formed in the test box. When the tested material is in this environment, for some relatively fragile materials, the negative pressure may cause them to deform, collapse or even rupture. Once the material structure is destroyed, the chemical composition inside it may change, and some substances that may have been wrapped inside the material may be released, or the originally stable molecular structure may be destroyed, thereby generating new volatiles, which will undoubtedly interfere with the detection of normal volatile harmful gases, resulting in the material being unable to be used in the next experiment, thereby causing material waste;

[0004] In the above technologies, although the gas sensor and the gas sample are in the same space, there is still the possibility of inaccurate detection results. This is mainly because the volatilized gas will be uneven during the volatilization process of the material, which is caused by uneven temperature distribution and diffusion and mass transfer limitations:

[0005] The diffusion of volatiles from the inside of the material to the surface may be affected by diffusion resistance. If the internal structure of the material hinders the diffusion of volatiles, it will lead to uneven supply of volatiles at different positions on the surface, resulting in uneven distribution of volatile gases. The concentration gradient in the mass transfer process will also affect the uniformity of volatile gases.

[0006] In addition, it takes a certain amount of time for the material to volatilize. While waiting for the material to volatilize, the gas sensor is in continuous contact with the volatile gas. During this process, the sensor is constantly consumed, which will seriously shorten the life of the sensor. Improvements should be made to reduce unnecessary contact between the sensor and the gas, thereby extending the use time of the sensor.

[0007] In the process of testing different materials, attention should also be paid to the problem of condensation after the volatilization of the materials. If condensation occurs, it will affect the accuracy of the test results. In the prior art, when the gas samples of some detection devices are transferred from the volatilization chamber to the detection chamber, due to the temperature difference between the two spaces, the gas samples will be partially condensed, resulting in inaccurate test results. The volatilization temperatures of different materials are different, and there is no unified specific temperature value.

[0008] Such as ether, acetone, etc., these organic solvents have relatively low boiling points and are easy to evaporate. After evaporation, they can condense quickly when encountering lower temperatures.

[0009] Here are some examples of harmful gases with low boiling points:

[0010] 1. Phosgene (carbonyl chloride), with a boiling point of 8.2°C, is a highly toxic gas that has been used in industrial production to make dyes, pesticides, plastics, etc. However, due to its extreme toxicity, its use is strictly restricted;

[0011] 2. Hydrogen fluoride (HF), with a boiling point of 19.5°C, is a colorless, toxic gas with a pungent odor. It is highly corrosive and can cause serious damage to human skin, eyes, and respiratory tract. When used in the chemical, electronics, and other industries, its leakage risk must be strictly controlled. Some electronic-grade hydrofluoric acid is used in semiconductor manufacturing and other fields and contains hydrogen fluoride. Improper use or storage may cause hydrogen fluoride leakage;

[0012] Therefore, when testing the toxicity of volatile gases from materials, it is particularly important to ensure that the volatiles maintain a constant temperature throughout the entire process from the beginning of volatilization to the time of testing.

[0013] In view of the above-mentioned shortcomings of existing equipment and various key points about material volatile gas detection, an environmentally friendly material toxic substance volatilization detection equipment is proposed. Summary of the invention

[0014] The purpose of the present invention is to provide a device for detecting the volatilization of toxic substances in environmentally friendly materials in order to solve the above problems, as described below.

[0015] To achieve the above object, the present invention provides the following technical solutions:

[0016] The present invention provides an environmental protection material toxic substance volatilization detection device, comprising:

[0017] Mounting frame;

[0018] A volatilization cylinder is arranged on a mounting frame, a first piston is slidably arranged in the volatilization cylinder, an electric push rod is arranged on the mounting frame, and is used to drive the first piston to move in the volatilization cylinder, and a material bin connected to the volatilization cylinder is arranged in the first piston, and is used to place the material to be tested;

[0019] A detection cylinder is arranged on a mounting frame, a second piston is slidably arranged in the detection cylinder, a heating rod is fixed between the first piston and the second piston, and the heating rod is slidably sealed with the volatilization cylinder and the detection cylinder respectively, and a gas detector is arranged in the detection cylinder;

[0020] A gas stirring assembly is arranged between the volatilization cylinder and the detection cylinder, and is used to connect the volatilization cylinder and the detection cylinder. The gas stirring assembly can be driven by the airflow flowing from the volatilization cylinder to the detection cylinder, so as to stir the gas flowing into the detection cylinder to make it uniform.

[0021] The surface of the detection cylinder is provided with a preheating component connected to the gas stirring component, which is used to absorb and volatilize the heated gas in the cylinder, thereby heating the surface of the detection cylinder;

[0022] The gas stirring assembly is connected to a gas charging and discharging assembly, which is used to cooperate with the electric push rod and the first piston to discharge the volatile gas of the material in the volatilization cylinder, the detection cylinder, the preheating assembly and the gas stirring assembly into the gas purification device, and absorb the external new air into the volatilization cylinder.

[0023] By using the above-mentioned environmentally friendly material toxic substance volatilization detection equipment, the material to be detected is placed in the material bin. If the material to be detected is liquid, the liquid material needs to be placed in a container and then placed in the material bin. The heating rod is turned on to increase the temperature in the volatilization cylinder. On the one hand, it can promote the volatilization speed of the material, and on the other hand, it can test the state performance and volatilization of the material at different temperatures.

[0024] When the material reaches the time and temperature set in the experiment, the electric push rod pushes the first piston, so that the first piston pushes the gas in the volatilization cylinder into the detection cylinder through the gas stirring component. When the gas passes through the gas stirring component, it can push the impeller, thereby driving the stirring paddle to rotate. The stirring paddle is used to stir the gas in the detection cylinder to make the gas sample evenly mixed;

[0025] During the process of the volatile gas in the volatilization cylinder being transferred to the detection cylinder, part of the volatile gas enters the preheating assembly, and the heat of the volatile gas is used to heat the surface of the detection cylinder. At the same time, the first piston drives the heating rod, so that the heating rod enters the detection cylinder. Through the cooperation of the preheating assembly and the heating rod, the internal temperature of the detection cylinder can be kept consistent with the internal temperature of the volatilization cylinder, thereby preventing the internal temperature of the detection cylinder from being lower than the internal temperature of the volatilization cylinder, causing the volatile gas to condense after entering the detection cylinder, thereby affecting the final detection result;

[0026] The second piston can move synchronously with the first piston through the heating rod. When the first piston moves to the position in contact with the bottom of the inner wall of the volatile cylinder, the second piston is at the farthest position from the top of the inner wall of the detection cylinder. Only then will the gas detector contact the gas sample. This design makes the timing of the activation of the gas detector delayed, thereby ensuring that the gas sample has enough time to be heated and mixed, avoiding the gas sample from contacting the gas detector in advance, thereby further improving the detection accuracy, while reducing the contact time between the gas detector and the gas sample, thereby reducing the loss of the gas detector;

[0027] Connect the deflation end of the gas charging and discharging assembly to a device specially used for purifying poisonous gas. After the gas sample test is completed, open the valve, and use the vacuum pump to draw the connecting pipe, preheating assembly, gas stirring assembly and gas samples in the detection cylinder into the poisonous gas purification device. Then open the air inlet valve, move the first piston through the electric push rod, and add new external air to the volatile cylinder for the next test. At the same time, the second piston will also follow the first piston back to the initial position. When the first piston is in the initial position, the volume in the volatile cylinder is at the maximum state. When the second piston is in the initial position, the volume in the detection cylinder is at the minimum state.

[0028] Preferably, the heating rod passes through the volatilization cylinder and the detection cylinder, and sealing rings are provided at positions where the volatilization cylinder and the detection cylinder contact the surface of the heating rod, and the sealing rings are slidably sealed with the surface of the heating rod.

[0029] Preferably, the gas stirring assembly comprises a connecting pipe, both ends of which are respectively connected to the volatile cylinder and the detection cylinder, a rotating shaft is rotatably arranged in the connecting pipe through a bearing seat, and there is a space for gas to pass between the bearing seat and the inner wall of the connecting pipe, an impeller and a stirring paddle are respectively arranged on the surface of the rotating shaft, a groove for accommodating the stirring paddle is opened in the wall of the detection cylinder, and one end of the stirring paddle and the rotating shaft does not protrude from the groove, and the other end of the rotating shaft is flush with the inner wall of the volatile cylinder, and the impeller is located in the connecting pipe.

[0030] Preferably, the inflation and deflation assembly includes a valve and an air pump, the valve is arranged on the connecting pipe and can block the connecting pipe, the valve is connected to a one-way valve through a pipeline, the one-way valve is connected to the air extraction end of the air pump, and the air pump is arranged on the volatilization cylinder body, and an air intake valve is arranged on the pipeline.

[0031] Preferably, the preheating assembly includes a fixed sleeve, which is fixed on the surface of the detection cylinder body and is used to cooperate with the surface of the detection cylinder body to form an air storage chamber. The air storage chamber is connected to the connecting pipe through a connecting pipe. An annular piston is slidably arranged in the air storage chamber. A pneumatic rod is arranged on the surface of the detection cylinder body, and the movable end of the pneumatic rod is fixed to the annular piston.

[0032] Preferably, the material bin comprises a chamber, the first piston is provided with a chamber, and the chamber is provided with a plurality of air holes connected with the volatilization cylinder body, a sealing cover for closing the chamber is threadedly connected in the chamber, and the air holes are offset from the connecting pipe.

[0033] Preferably, temperature sensors are provided in the chamber and the detection cylinder.

[0034] Preferably, the gas detector is capable of detecting a variety of gases, and the gas detector can be used in a vacuum environment.

[0035] Preferably, the outer wall of the second piston cooperates with the inner wall of the detection cylinder to seal the probe of the gas detector, and the probe of the gas detector can be fully exposed only when the second piston moves to the farthest position from the top of the inner wall of the detection cylinder.

[0036] The beneficial effects are:

[0037] 1. A volatilization cylinder is set up for volatilization of materials. The electric push rod pushes the first piston, so that the first piston pushes the gas in the volatilization cylinder into the detection cylinder through the gas stirring component. When the gas passes through the gas stirring component, it can push the impeller, thereby driving the stirring paddle to rotate. The stirring paddle is used to stir the gas in the detection cylinder to make the gas sample evenly mixed, thereby avoiding the problem of uneven gas affecting the detection, thereby ensuring accurate detection;

[0038] 2. The preheating component utilizes the heat of the volatile gas to heat the surface of the detection cylinder. At the same time, the first piston drives the heating rod to enter the detection cylinder. The preheating component cooperates with the heating rod to keep the internal temperature of the detection cylinder consistent with the internal temperature of the volatile cylinder, thereby preventing the internal temperature of the detection cylinder from being lower than the internal temperature of the volatile cylinder, causing the volatile gas to enter the detection cylinder and condense, affecting the final test results, and further ensuring the accuracy of the test results;

[0039] 3. The second piston can move synchronously with the first piston through the heating rod. When the first piston moves to the position of contacting the bottom of the inner wall of the volatile cylinder, the second piston is at the farthest position from the top of the inner wall of the detection cylinder. Only then will the gas detector contact the gas sample. This design makes the timing of the gas detector activation delayed, so as to ensure that the gas sample has enough time to be heated and mixed, avoiding the gas sample from contacting the gas detector in advance, thereby further improving the detection accuracy, and reducing the contact time between the gas detector and the gas sample, thereby reducing the loss of the gas detector and extending the service life of the gas detector;

[0040] 4. The gas charging and discharging assembly is connected with a device specially used for purifying poisonous gas. The gas charging and discharging assembly can draw the gas samples in the connecting pipe, preheating assembly, gas stirring assembly and detection cylinder into the poisonous gas purification device, thereby avoiding directly releasing the volatilized gas of the material into the environment to cause pollution;

[0041] 5. Through the cooperation between the volatilization cylinder, the first piston and the material bin, the material in the material bin will not be affected when the gas filling and deflation assembly is evacuated, thereby avoiding damage to the material, allowing the material to be tested multiple times, saving consumables and reducing testing costs;

[0042] 6. By increasing the temperature inside the volatilization cylinder through the heating rod, the volatilization speed of the material can be promoted on the one hand, and the state performance and volatilization of the material at different temperatures can be tested on the other hand. At the same time, the heating rod can make the first piston and the second piston work together, and no other structure is needed to drive the second piston, thereby reducing the manufacturing cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 It is a front view structural schematic diagram of the present invention;

[0045] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0046] Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the present invention;

[0047] Figure 4 The present invention Figure 1 The enlarged structural diagram at A in the middle;

[0048] Figure 5 is a schematic diagram of the three-dimensional structure of the second piston of the present invention;

[0049] Figure 6 It is a schematic diagram of the three-dimensional structure of the detection cylinder of the present invention;

[0050] Figure 7 is a schematic diagram of the three-dimensional structure of the first piston of the present invention;

[0051] Figure 8 It is a schematic diagram of the three-dimensional structure of the detection cylinder body of the present invention from another perspective;

[0052] Fig. 9It is a schematic diagram of the three-dimensional structure of the stirring paddle of the present invention.

[0053] The following are the descriptions of the reference numerals:

[0054] 1. Mounting frame; 2. Volatilization cylinder; 3. Detection cylinder; 4. First piston; 5. Material bin; 6. Bin; 7. Air vent; 8. Sealing cover; 9. Electric push rod; 10. Gas stirring assembly; 11. Heating rod; 12. Second piston; 13. Gas detector; 14. Temperature sensor; 15. Preheating assembly; 16. Sealing ring; 17. Fixing sleeve; 18. Annular piston; 19. Connecting pipe; 20. Air pressure rod; 21. Connecting pipe; 22. Groove; 23. Rotating shaft; 24. Bearing seat; 25. Impeller; 26. Agitator paddle; 27. Valve; 28. Pipeline; 29. ​​Inlet valve; 30. One-way valve; 31. Vacuum pump; 32. Inflating and discharging assembly; 33. Air storage chamber. DETAILED DESCRIPTION

[0055] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0056] See also Figure 1-Figure 9 As shown, the present invention provides a device for detecting the volatilization of toxic substances in environmentally friendly materials, comprising:

[0057] Mounting frame 1;

[0058] The volatilization cylinder 2 is arranged on the mounting frame 1, and a first piston 4 is slidably arranged in the volatilization cylinder 2. An electric push rod 9 is arranged on the mounting frame 1 for driving the first piston 4 to move in the volatilization cylinder 2. A material bin 5 connected with the volatilization cylinder 2 is arranged in the first piston 4 for placing the material to be tested;

[0059] The detection cylinder 3 is arranged on the mounting frame 1, and a second piston 12 is slidably arranged in the detection cylinder 3. A heating rod 11 is fixed between the first piston 4 and the second piston 12, and the heating rod 11 is slidably sealed with the volatilization cylinder 2 and the detection cylinder 3 respectively. A gas detector 13 is arranged in the detection cylinder 3;

[0060] The gas stirring assembly 10 is disposed between the volatilization cylinder 2 and the detection cylinder 3, and is used to connect the volatilization cylinder 2 and the detection cylinder 3. The gas stirring assembly 10 can be driven by the airflow flowing from the volatilization cylinder 2 to the detection cylinder 3, thereby stirring the gas flowing into the detection cylinder 3 to make it uniform;

[0061] The surface of the detection cylinder 3 is provided with a preheating component 15 which is in communication with the gas stirring component 10 and is used to absorb the heated gas in the volatilization cylinder 2, thereby heating the surface of the detection cylinder 3;

[0062] The gas stirring assembly 10 is connected to a gas charging and discharging assembly 32, which is used to cooperate with the electric push rod 9 and the first piston 4 to discharge the volatile gas of the material in the volatilization cylinder 2, the detection cylinder 3, the preheating assembly 15 and the gas stirring assembly 10 into the gas purification device, and absorb the external new air into the volatilization cylinder 2.

[0063] As an optional embodiment, the heating rod 11 passes through the volatilization cylinder 2 and the detection cylinder 3, and the positions where the volatilization cylinder 2 and the detection cylinder 3 contact the surface of the heating rod 11 are provided with sealing rings 16, and the sealing rings 16 are slidably sealed with the surface of the heating rod 11;

[0064] The heating rod 11 has two functions. One is to control the internal temperature of the volatile cylinder 2 and the detection cylinder 3, and the other is to make the first piston 4 and the second piston 12 work together. The heating rod 11 is a prior art, and one of the ways of its structure is listed. For example, the surface of the heating rod 11 can be made of a steel pipe, and an electric heating wire is arranged inside the steel pipe. In this way, the heating rod 11 has a heating function, and it is also easy to achieve a sliding and sealed connection with the volatile cylinder 2 and the detection cylinder 3. The power supply line of the heating rod 11 needs to pass through the first piston 4, and the position where the power supply line passes through the first piston 4 is sealed with a sealant.

[0065] The gas stirring assembly 10 includes a connecting pipe 21, the two ends of which are respectively connected to the volatilization cylinder 2 and the detection cylinder 3, a rotating shaft 23 is rotatably arranged in the connecting pipe 21 through a bearing seat 24, and there is a space for gas to pass between the bearing seat 24 and the inner wall of the connecting pipe 21, an impeller 25 and a stirring paddle 26 are respectively arranged on the surface of the rotating shaft 23, a groove 22 for accommodating the stirring paddle 26 is opened in the wall of the detection cylinder 3, and the stirring paddle 26 and one end of the rotating shaft 23 do not protrude from the groove 22, and the other end of the rotating shaft 23 is flush with the inner wall of the volatilization cylinder 2, and the impeller 25 is located in the connecting pipe 21;

[0066] The electric push rod 9 pushes the first piston 4, so that the first piston 4 pushes the gas in the volatilization cylinder 2 into the detection cylinder 3 through the gas stirring assembly 10. When the gas passes through the gas stirring assembly 10, it can push the impeller 25. The impeller 25 drives the stirring paddle 26 to rotate through the rotating shaft 23. The stirring paddle 26 stirs the gas in the detection cylinder 3 to make the gas sample evenly mixed.

[0067] The gas stirring assembly 10 does not require electric drive, which can reduce the number of structures, save costs, and also reduce the steps of manual active operation.

[0068] The gas charging and discharging assembly 32 includes a valve 27 and an air pump 31. The valve 27 is arranged on the connecting pipe 21 and can block the connecting pipe 21. The valve 27 is connected to a one-way valve 30 through a pipeline 28. The one-way valve 30 is connected to the air extraction end of the air pump 31. The air pump 31 is arranged on the volatilization cylinder 2. The pipeline 28 is provided with an air inlet valve 29.

[0069] The deflation end of the gas filling and deflation assembly 32 is connected to a device specifically used for purifying poisonous gas. After the gas sample is detected, the valve 27 is opened, and the gas sample in the connecting pipe 21, the preheating assembly 15, the gas stirring assembly 10 and the detection cylinder 3 is pumped into the poisonous gas purification device through the air pump 31. Then, the air inlet valve 29 is opened, and the first piston 4 is moved by the electric push rod 9 to replenish the external new air into the volatilization cylinder 2 for the next detection. The poisonous gas purification device is a prior art and will not be described in detail.

[0070] When the device discharges volatile gas through the gas charging and discharging component 32, the first piston 4 fits against the bottom of the inner wall of the volatile cylinder 2, and the first piston 4 can block the end of the connecting pipe 21. At this time, the material bin 5 is completely isolated from the connecting pipe 21, so the negative pressure generated when the gas charging and discharging component 32 discharges volatile gas will not affect the material in the material bin 5, thereby preventing the material from being damaged by the negative pressure environment;

[0071] It should be noted that when the material bin 5 is opened to take out the material inside, a small amount of volatile gas will be volatilized into the environment, but due to its small volume, it will not cause any actual impact on the environment. In addition, the experiment of volatile organic compounds needs to be carried out in a ventilation box or laboratory with ventilation. During the experiment, an air treatment system needs to be installed in the laboratory and it should be kept running for at least ten minutes after the experiment. Therefore, a small amount of leakage can be fully handled. Therefore, this does not affect the integrity of the technical solution.

[0072] At the same time, the second piston 12 will also follow the first piston 4 back to the initial position. When the first piston 4 is at the initial position, the volume in the volatilization cylinder 2 is at the maximum state. When the second piston 12 is at the initial position, the volume in the detection cylinder 3 is at the minimum state.

[0073] The preheating assembly 15 includes a fixed sleeve 17, which is fixed on the surface of the detection cylinder 3 and is used to cooperate with the surface of the detection cylinder 3 to form an air storage chamber 33. The air storage chamber 33 is connected to the connecting pipe 21 through a connecting pipe 19. An annular piston 18 is slidably arranged in the air storage chamber 33. A pneumatic rod 20 is arranged on the surface of the detection cylinder 3, and the movable end of the pneumatic rod 20 is fixed to the annular piston 18.

[0074] During the process of the volatile gas in the volatilization cylinder 2 being transferred to the detection cylinder 3, part of the volatile gas enters the preheating assembly 15, and the heat of the volatile gas is used to heat the surface of the detection cylinder 3. At the same time, the first piston 4 drives the heating rod 11, so that the heating rod 11 enters the interior of the detection cylinder 3. Through the cooperation of the preheating assembly 15 and the heating rod 11, the internal temperature of the detection cylinder 3 can be kept consistent with the internal temperature of the volatilization cylinder 2, thereby preventing the internal temperature of the detection cylinder 3 from being lower than the internal temperature of the volatilization cylinder 2, causing the volatile gas to condense after entering the detection cylinder 3, thereby affecting the final detection result;

[0075] The gas in the volatilization cylinder 2 enters the gas storage chamber 33 through the connecting pipe 21 and the connecting pipe 19 in turn. The gas storage chamber 33 can be sealed by providing the annular piston 18. When the gas enters the gas storage chamber 33, the annular piston 18 is pushed by the gas, and the gas pressure rod 20 is compressed. When the gas charging and discharging assembly 32 discharges the gas, the gas in the gas storage chamber 33 is drawn away, and the annular piston 18 is reset under the push of the gas pressure rod 20, so that the volume of the gas storage chamber 33 returns to zero.

[0076] The sum of the maximum volume of the gas storage chamber 33 and the maximum volume of the detection cylinder 3 is equal to the maximum volume of the volatilization cylinder 2. This design is to ensure that the air pressure of the gas sample when it is in the detection cylinder 3 is consistent with the air pressure when it is in the volatilization cylinder 2, so as to avoid differences in air pressure data affecting the experimental results.

[0077] The material bin 5 includes a bin chamber 6, the first piston 4 has a bin chamber 6, and the bin chamber 6 has a plurality of air holes 7 connected to the volatilization cylinder 2, a sealing cover 8 for closing the bin chamber 6 is threadedly connected to the bin chamber 6, and the air holes 7 are offset from the connecting pipe 21;

[0078] The material to be tested is placed in the chamber 6 , and the volatile substances of the material can enter the volatile cylinder 2 through the air vent 7 . If the material to be tested is liquid, the liquid material needs to be placed in a container and then placed in the material chamber 5 .

[0079] Temperature sensors 14 are provided in both the chamber 6 and the detection cylinder 3. The temperature sensors 14 are used to monitor the temperature in the material chamber 5 and the detection cylinder 3 to ensure the consistency of the temperatures in these two areas and to prevent temperature factors from affecting the detection results. In addition, the temperature sensors 14 are respectively embedded in the chamber 6 and the detection cylinder 3, and the gaps are sealed with sealant to ensure the airtightness of the chamber 6 and the detection cylinder 3.

[0080] The gas detector 13 can detect a variety of gases, and the gas detector 13 can be used in a vacuum environment. The gas detector 13 is a prior art, and there are several options for the gas detector 13 that can meet this requirement, such as thermal conductivity gas sensor-MTCs2601, MTCs2300 series, etc., zirconium oxide oxygen sensor-O2S-FR-T2-18BM-C and photoionization gas sensor. The above types of sensors are mainly used because when the gas sample is discharged, the detection cylinder 3 will be close to vacuum, and ordinary sensors are at risk of damage in a vacuum, so it is necessary to use a sensor that can adapt to the vacuum environment.

[0081] The outer wall of the second piston 12 cooperates with the inner wall of the detection cylinder 3 to close the probe of the gas detector 13. When the second piston 12 moves to the farthest position from the top of the inner wall of the detection cylinder 3, the probe of the gas detector 13 can be fully exposed. This design is to delay the timing of activating the gas detector 13, so as to ensure that the gas sample has sufficient time to be heated and mixed, avoiding premature contact between the gas sample and the gas detector 13, thereby further improving the detection accuracy, while reducing the contact time between the gas detector 13 and the gas sample, thereby reducing the loss of the gas detector 13.

[0082] With the above structure, the material to be tested is placed in the material bin 5. If the material to be tested is liquid, the liquid material needs to be placed in a container and then placed in the material bin 5. The heating rod 11 is turned on to increase the temperature in the volatilization cylinder 2. On the one hand, the volatilization speed of the material can be promoted, and on the other hand, the state performance and volatilization of the material at different temperatures can be tested.

[0083] When the material reaches the time and temperature set in the experiment, the electric push rod 9 pushes the first piston 4, so that the first piston 4 pushes the gas in the volatilization cylinder 2 into the detection cylinder 3 through the gas stirring component 10. During the process of the gas passing through the gas stirring component 10, the impeller 25 can be pushed, thereby driving the stirring paddle 26 to rotate, and the stirring paddle 26 is used to stir the gas in the detection cylinder 3, so that the gas sample is evenly mixed;

[0084] During the process of the volatile gas in the volatilization cylinder 2 being transferred to the detection cylinder 3, part of the volatile gas enters the preheating assembly 15, and the heat of the volatile gas is used to heat the surface of the detection cylinder 3. At the same time, the first piston 4 drives the heating rod 11, so that the heating rod 11 enters the interior of the detection cylinder 3. Through the cooperation of the preheating assembly 15 and the heating rod 11, the internal temperature of the detection cylinder 3 can be kept consistent with the internal temperature of the volatilization cylinder 2, thereby preventing the internal temperature of the detection cylinder 3 from being lower than the internal temperature of the volatilization cylinder 2, causing the volatile gas to condense after entering the detection cylinder 3, thereby affecting the final detection result;

[0085] The second piston 12 can move synchronously with the first piston 4 through the heating rod 11. When the first piston 4 moves to the position in contact with the bottom of the inner wall of the volatilization cylinder 2, the second piston 12 is at the farthest position from the top of the inner wall of the detection cylinder 3. Only then will the gas detector 13 contact the gas sample. This design makes the timing of the activation of the gas detector 13 delayed, so as to ensure that the gas sample has enough time to be heated and mixed, and avoid the gas sample from contacting the gas detector 13 in advance, so as to further improve the detection accuracy, and at the same time reduce the contact time between the gas detector 13 and the gas sample, thereby reducing the loss of the gas detector 13;

[0086] The deflation end of the gas filling and deflation component 32 is connected to a device specifically used for purifying poisonous gas. After the gas sample test is completed, the valve 27 is opened, and the gas samples in the connecting pipe 21, the preheating component 15, the gas stirring component 10 and the detection cylinder 3 are pumped into the poisonous gas purification device through the air pump 31. Then, the air inlet valve 29 is opened again, and the first piston 4 is moved by the electric push rod 9 to replenish the external new air into the volatilization cylinder 2 for the next test. At the same time, the second piston 12 will also follow the first piston 4 back to the initial position. When the first piston 4 is in the initial position, the volume in the volatilization cylinder 2 is in the maximum state. When the second piston 12 is in the initial position, the volume in the detection cylinder 3 is in the minimum state.

[0087] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A device for detecting the volatilization of toxic substances in environmentally friendly materials, characterized in that: include: Mounting frame (1); A volatilization cylinder (2) is arranged on a mounting frame (1), a first piston (4) is slidably arranged in the volatilization cylinder (2), an electric push rod (9) is arranged on the mounting frame (1) for driving the first piston (4) to move in the volatilization cylinder (2), and a material bin (5) connected to the volatilization cylinder (2) is arranged in the first piston (4) for placing materials to be tested; A detection cylinder (3) is arranged on a mounting frame (1), a second piston (12) is slidably arranged in the detection cylinder (3), a heating rod (11) is fixed between the first piston (4) and the second piston (12), and the heating rod (11) is slidably sealed with the volatilization cylinder (2) and the detection cylinder (3), and a gas detector (13) is arranged in the detection cylinder (3); A gas stirring assembly (10) is arranged between the volatilization cylinder (2) and the detection cylinder (3) and is used to connect the volatilization cylinder (2) and the detection cylinder (3). The gas stirring assembly (10) can be driven by the airflow flowing from the volatilization cylinder (2) to the detection cylinder (3), thereby stirring the gas flowing into the detection cylinder (3) to make it uniform. The surface of the detection cylinder (3) is provided with a preheating component (15) which is in communication with the gas stirring component (10) and is used for absorbing and volatilizing the heated gas in the cylinder (2), thereby heating the surface of the detection cylinder (3); The gas stirring assembly (10) is connected to a gas charging and discharging assembly (32) for cooperating with the electric push rod (9) and the first piston (4) to discharge the volatilized gas of the material in the volatilization cylinder (2), the detection cylinder (3), the preheating assembly (15) and the gas stirring assembly (10) into the gas purification device, and to absorb the external new air into the volatilization cylinder (2).

2. According to claim 1, a device for detecting the volatilization of toxic substances in environmentally friendly materials is characterized by: The heating rod (11) passes through the volatilization cylinder (2) and the detection cylinder (3), and sealing rings (16) are provided at positions where the volatilization cylinder (2) and the detection cylinder (3) contact the surface of the heating rod (11), and the sealing ring (16) and the surface of the heating rod (11) are slidably sealed.

3. The environmentally friendly material toxic substance volatilization detection device according to claim 1 is characterized by: The gas stirring assembly (10) comprises a connecting pipe (21), the two ends of which are respectively connected to the volatilization cylinder (2) and the detection cylinder (3); a rotating shaft (23) is rotatably arranged in the connecting pipe (21) via a bearing seat (24); a space for gas to pass through is provided between the bearing seat (24) and the inner wall of the connecting pipe (21); an impeller (25) and a stirring paddle (26) are respectively provided on the surface of the rotating shaft (23); a groove (22) for accommodating the stirring paddle (26) is provided in the wall of the detection cylinder (3); one end of the stirring paddle (26) and the rotating shaft (23) do not protrude from the groove (22); the other end of the rotating shaft (23) is flush with the inner wall of the volatilization cylinder (2); and the impeller (25) is located in the connecting pipe (21).

4. The environmentally friendly material toxic substance volatilization detection device according to claim 3 is characterized by: The gas charging and discharging assembly (32) comprises a valve (27) and an air pump (31); the valve (27) is arranged on the connecting pipe (21) and is capable of blocking the connecting pipe (21); the valve (27) is connected to a one-way valve (30) via a pipeline (28); the one-way valve (30) is connected to an air extraction end of the air pump (31); the air pump (31) is arranged on the volatilization cylinder (2); and an air intake valve (29) is arranged on the pipeline (28).

5. The environmentally friendly material toxic substance volatilization detection device according to claim 3 is characterized by: The preheating assembly (15) comprises a fixed sleeve (17), wherein the fixed sleeve (17) is fixed on the surface of the detection cylinder (3) and is used to cooperate with the surface of the detection cylinder (3) to form an air storage chamber (33), wherein the air storage chamber (33) is connected to the connecting pipe (21) via a connecting pipe (19), an annular piston (18) is slidably arranged in the air storage chamber (33), and a pneumatic rod (20) is arranged on the surface of the detection cylinder (3), and a movable end of the pneumatic rod (20) is fixed to the annular piston (18).

6. The environmentally friendly material toxic substance volatilization detection device according to claim 5, characterized in that: The material bin (5) comprises a bin chamber (6), the first piston (4) is provided with a bin chamber (6), and the bin chamber (6) is provided with a plurality of air holes (7) which are in communication with the volatilization cylinder (2), the bin chamber (6) is internally threadedly connected with a sealing cover (8) for sealing the bin chamber (6), and the air holes (7) are offset from the connecting pipe (21).

7. The environmentally friendly material toxic substance volatilization detection device according to claim 6, characterized in that: Temperature sensors (14) are provided in both the chamber (6) and the detection cylinder (3).

8. The environmentally friendly material toxic substance volatilization detection device according to claim 1, characterized in that: The gas detector (13) is capable of detecting a variety of gases, and the gas detector (13) can be used in a vacuum environment.

9. The environmentally friendly material toxic substance volatilization detection device according to claim 8, characterized in that: The outer wall of the second piston (12) cooperates with the inner wall of the detection cylinder (3) to seal the probe of the gas detector (13); the probe of the gas detector (13) is fully exposed only when the second piston (12) moves to the farthest position from the top of the inner wall of the detection cylinder (3).

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