A storage box for a volatile organic compound sampling tube

Abstract

The present invention discloses a storage box for a volatile organic compound sampling tube. The storage box body includes an air inlet box, a sampling box, and an air outlet box, which are stacked in sequence and detachably installed and fixed. A plurality of heating sleeves are provided in the sampling box, and sampling tubes are provided in the heating sleeves. A nitrogen gas tank is also provided in the sampling box, which is communicated with the air inlet box. An air inlet conveying channel and an air outlet conveying channel are respectively provided in the air inlet box and the air outlet box. Each sampling tube is tightly fixed through the air outlet box and the air inlet box. Valves are provided on the nitrogen gas tank, the air inlet conveying channel, and the air outlet conveying channel. A locking structure is provided between the air outlet box and the sampling box, and between the air inlet box and the sampling box. An air inlet pipe for facilitating air inlet is provided on the air inlet box, and an air outlet pipe for facilitating air outlet is provided on the air outlet box; this storage box can be quickly connected to the sampling system, and sampling can be carried out in sequence through a sampling pump, which is convenient for storage and transportation, and can stably discharge volatile organic compounds during detection, effectively improving the detection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of organic matter detection systems, and particularly relates to a storage box for volatile organic compound sampling tubes. Background Art

[0002] According to the definition of the World Health Organization, volatile organic compounds (VOCs) are organic compounds with a temperature range of 50°C - 250°C, and the saturated vapor pressure exceeds 133.32 Kpa at room temperature. Volatile organic compounds are a type of air pollutant, which is toxic and will participate in photochemical reactions under light conditions, forming photochemical smog, generating ozone, peroxyacetyl nitrate and other pollutants. Accurately determining the nature and quantity of different types of volatile organic compounds is the core of control; outdoor volatile organic compounds mainly come from fuel combustion and transportation; indoors, they mainly come from the combustion products of coal and natural gas, smoking, the smoke from heating and cooking, the emissions of building and decoration materials, furniture, household appliances, cleaning agents and the human body itself; therefore, there are corresponding collection and detection standards for VOCs in each field to regulate and implement;

[0003] Currently, the main method for collecting VOCs is active sampling, that is, through a sampling pump to pump air so that the gas flows through the sampling tube. The sampling tube contains special organic matter absorption fillers, so that VOCs stay on the absorption fillers in the sampling tube; then the sampling tube is removed and transported back to the laboratory for timely analysis. After the sampling tube is sent to the laboratory, the sampling tube also needs to be heated to release the volatile organic compounds in the absorption filler to meet the detection requirements. After release, the sampling tube also needs to be further cleaned to ensure that the volatile organic compounds in the absorption filler are completely released to meet the next sampling requirements.

[0004] However, the current sampling method has the following disadvantages:

[0005] 1. Currently, sampling generally requires multiple samplings to ensure the accuracy of the sampling results. Therefore, it is necessary to frequently disassemble and assemble multiple sampling tubes, and the disassembly and assembly operations are very cumbersome;

[0006] 2. After the sampling tube is sent to the laboratory, a separate device is required to heat the sampling tube to release the volatile organic compounds in the absorption filler. After release, the sampling tube also needs to be separately cleaned. Release and cleaning cannot be completed in one device, so it is also necessary to frequently disassemble and assemble the sampling tube;

[0007] 3. The absorption filler in the sampling tube has a strong absorption capacity for organic matter in the air. Therefore, during transportation, once the sampling tube comes into frequent contact with the outside air, the absorption filler is likely to adsorb the volatile organic compounds in the external air, resulting in inaccurate test results. Summary of the Invention

[0008] The technical problem to be solved by the present invention is: a storage box for volatile organic compound sampling tubes, which can be quickly connected to the sampling system, can sequentially perform sampling through a sampling pump, is convenient for storage and transportation, and can stably discharge volatile organic compounds during detection, effectively improving the detection efficiency.

[0009] To solve the above technical problem, the technical solution of the present invention is: a storage box for volatile organic compound sampling tubes, including a storage box body. The storage box body includes an air inlet box, a sampling box, and an air outlet box. The air outlet box, the sampling box, and the air inlet box are stacked in sequence and detachably installed and fixed. A plurality of heating sleeves are provided in the sampling box, and corresponding sampling tubes are provided in the heating sleeves. A nitrogen tank is also provided in the sampling box, and the nitrogen tank is communicated with the air inlet box. Air inlet conveying channels and air outlet conveying channels corresponding to and sealingly cooperating with both ends of the sampling tubes are respectively provided in the air inlet box and the air outlet box. Each sampling tube is pressed and fixed through the air outlet box and the air inlet box. Valves that are convenient to open or close are provided on the nitrogen tank, the air inlet conveying channel, and the air outlet conveying channel. The air outlet box has the same structure as the air inlet box. Locking structures are provided between the air outlet box and the sampling box, and between the air inlet box and the sampling box. An air inlet pipe convenient for air inlet is provided on the air inlet box, and an air outlet pipe convenient for air outlet is provided on the air outlet box. Flow control valves that can be opened and closed are provided on both the air inlet pipe and the air outlet pipe. The ends of the air inlet pipe and the air outlet pipe are both quick-insert structures. A replacement connecting pipe with a valve is also connected between the air inlet box and the air outlet box.

[0010] As a preferred solution, the air inlet box includes an air inlet chamber. A plurality of air inlet conveying holes are opened on the air inlet chamber, and each air inlet conveying hole is correspondingly communicated with the air inlet conveying channel. An upper guiding inclined groove for pressing and sealing the sampling tube is opened at the lower end of the air inlet conveying channel, and the air inlet pipe is communicated with the air inlet chamber.

[0011] As a preferred solution, the air outlet box includes an air outlet chamber. A plurality of air outlet conveying holes are opened in the air outlet chamber, and each air outlet conveying hole is correspondingly communicated with the air outlet conveying channel. A lower guiding inclined groove for pressing and sealing the sampling tube is opened at the upper end of the air outlet conveying channel, and the air outlet pipe is communicated with the air outlet chamber.

[0012] As a preferred solution, elastic gaskets in contact with the sampling tube are provided on both the upper guiding inclined groove and the lower guiding inclined groove.

[0013] As a preferred solution, a purging pipe extending into the air inlet chamber is provided on the nitrogen tank, and a quick-insert structure convenient for disassembly and assembly is also provided on the purging pipe.

[0014] As a preferred solution, the valves are all electromagnetic control valves.

[0015] As a preferred solution, a handle convenient for grasping is rotatably installed on the air inlet box.

[0016] After adopting the above technical solution, the effects of the present invention are as follows: A volatile organic compound sampling tube storage box includes a storage box body. The storage box body includes an air inlet box, a sampling box, and an air outlet box. The air outlet box, the sampling box, and the air inlet box are stacked in sequence and detachably installed and fixed. A number of heating sleeves are provided in the sampling box, and corresponding sampling tubes are provided in the heating sleeves. A nitrogen gas tank is also provided in the sampling box, and the nitrogen gas tank communicates with the air inlet box. An air inlet conveying channel and an air outlet conveying channel that are hermetically and correspondingly matched with the two ends of the sampling tube are respectively provided in the air inlet box and the air outlet box. Each sampling tube is pressed and fixed through the air outlet box and the air inlet box. Valves that are convenient to open or close are provided on the nitrogen gas tank, the air inlet conveying channel, and the air outlet conveying channel. The air outlet box has the same structure as the air inlet box. A locking structure is provided between the air outlet box and the sampling box, and between the air inlet box and the sampling box. An air inlet pipe that is convenient for air inlet is provided on the air inlet box, and an air outlet pipe that is convenient for air outlet is provided on the air outlet box. Flow control valves that can be opened and closed are provided on both the air inlet pipe and the air outlet pipe. The ends of the air inlet pipe and the air outlet pipe are both quick-insert structures. A replacement connection pipe with a valve is also connected between the air inlet box and the air outlet box; First, connect the air inlet pipe to the suction pipe, place the suction pipe at the sampling point, connect the air outlet pipe to the sampling pump, open the flow control valve, open the first valve corresponding in the air inlet box and the air outlet box, and the sampling pump starts to work. The sampling gas enters the sampling tube through the conveying channel in the air inlet box. The volatile organic compounds are absorbed by the absorption filler, and the remaining gas enters the air outlet box through the conveying channel in the air outlet box and is finally discharged from the air outlet pipe. Then, close the first valve in the air inlet box and the air outlet box, open the corresponding second valve, the sampling gas enters the corresponding sampling tube, repeat the operation, and the remaining gas is discharged. By analogy, sample enough sampling tubes as required. Then, separate the air inlet pipe from the suction pipe, stop the sampling pump, move the sampling pump and the storage box body as a whole to a clean environment, open the valve on the replacement connection pipe and start the sampling pump to continuously sample to replace the sampling gas in the air inlet box and the air outlet box. Stop the sampling pump and close the valve on the replacement connection pipe. Finally, separate the air outlet pipe from the air extraction pump, and then close the flow control valve. At this time, the sampling tube is stored in the sampling box and does not contact the outside gas, and the volatile organic compounds can be effectively stored; When performing detection, connect the air outlet pipe and the air inlet pipe to the detection instrument, and the heating sleeve outside the specified sampling tube works to heat it. The volatile organic compounds in the sampling tube start to volatilize, and the volatile organic compounds in the sampling tube will separate from the absorption filler and be discharged from the air outlet pipe, thus completing the detection; Each sampling tube can be subjected to the release detection operation of volatile organic compounds in the above manner. The whole process does not require frequent disassembly and assembly of the sampling tube, and the operation is very convenient, effectively improving the detection efficiency;After the detection is completed, the air outlet pipe and the air inlet pipe are separated from the detection instrument, and then the cleaning and purging work can be carried out. All the heating sleeves can be started to heat all the sampling tubes, and nitrogen purging can be carried out to purge all the volatile organic compounds in the sampling tubes, which is convenient for the next use. The air outlet box, the sampling box and the air inlet box are stacked in sequence and can be detachably installed and fixed, which is convenient for replacing the sampling tubes.

[0017] Also, since the air inlet box includes an air inlet chamber, a plurality of air inlet delivery holes are opened on the air inlet chamber, and each air inlet delivery hole is in one-to-one correspondence and communication with the air inlet delivery channel. A upper guiding inclined groove for pressing and sealing the sampling tube is opened at the lower end of the air inlet delivery channel, and the air inlet pipe is connected to the air inlet chamber. The air outlet box includes an air outlet chamber, and a plurality of air outlet delivery holes are opened in the air outlet chamber. Each air outlet delivery hole is in one-to-one correspondence and communication with the air outlet delivery channel. A lower guiding inclined groove for pressing and sealing the sampling tube is opened at the upper end of the air outlet delivery channel, and the air outlet pipe is connected to the air outlet chamber. In this way, the air inlet chamber and the air inlet delivery channel are both connected, so that the sampling gas can enter any one of the sampling tubes. When the valve is opened, the sampling gas can quickly enter the corresponding sampling tube and then be discharged from the air outlet delivery channel in the air outlet box. And the upper guiding inclined groove and the lower guiding inclined groove have a certain slope, so that the upper guiding inclined groove and the lower guiding inclined groove cooperate with each other to quickly fix and seal the sampling tube. When the air inlet box body is installed on the sampling box, it can be automatically positioned and adjusted, so that the installation is accurate.

[0018] Also, since elastic gaskets in contact with the sampling tube are provided on both the upper guiding inclined groove and the lower guiding inclined groove, it has a certain elasticity during installation, can effectively press and seal both ends of the sampling tube, and improves the sampling efficiency.

[0019] Also, since a purging pipe extending into the air inlet chamber is provided on the nitrogen tank, and a quick-insert structure for convenient disassembly and assembly is also provided on the purging pipe, it can be quickly disassembled and assembled, which is convenient for the disassembly and assembly between the air inlet box and the sampling box and improves the practicability.

[0020] Also, since the valves are all electromagnetic control valves, the opening and closing are accurately and effectively controlled by the electromagnetic control valves, which omits the tediousness of manually opening and closing one by one and improves the efficiency.

[0021] Also, since a handle convenient for grasping is rotatably installed on the air inlet box, first, all the sampling tubes are in the sampling box. In this way, after the sampling is completed, the whole storage box can be moved, which is simple and convenient and improves the efficiency. And after the sampling tubes are sampled and need to be stored and moved to a designated place for detection, the whole storage box can be moved by grasping the handle during the movement, which improves the convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the drawings and embodiments.

[0023] Figure 1 is a perspective view of an embodiment of the present invention;

[0024] Figure 2 is a schematic structural view inside an embodiment of the present invention;

[0025] Figure 3 is a top view of an air inlet box of an embodiment of the present invention;

[0026] Figure 4 is Figure 3 a sectional view taken along line A–A;

[0027] Figure 5 is a schematic structural view inside a sampling box of an embodiment of the present invention;

[0028] Figure 6 is a schematic structural view of an air outlet box of an embodiment of the present invention;

[0029] In the drawings: 1, air inlet box; 2, sampling box; 3, air outlet box; 4, heating sleeve; 5, sampling tube; 6, nitrogen tank; 7, air inlet pipeline; 8, air outlet pipeline; 9, flow control valve; 10, groove seat; 11, lock seat; 12, lock body; 13, buckle ring; 14, air inlet chamber; 141, air inlet delivery hole; 15, air inlet delivery channel; 16, upper guiding inclined groove; 17, air outlet chamber; 18, air outlet delivery hole; 19, lower guiding inclined groove; 20, air outlet delivery channel; 21, elastic washer; 22, purging pipeline; 23, gas quick connector; 24, electromagnetic control valve; 25, control screen; 26, handle; 27, first replacement pipeline; 28, second replacement pipeline; 29, ball valve; 30, connecting pipeline. Detailed Embodiments

[0030] The present invention will be further described in detail below through specific embodiments.

[0031] As Figures 1 to 5As shown in the figure, a preservation box for volatile organic compound sampling tubes includes a box body, which comprises an air inlet box 1, a sampling box 2 and an air outlet box 3. The air outlet box 3, the sampling box 2 and the air inlet box 1 are stacked in sequence and detachably installed and fixed. A plurality of heating sleeves 4 are arranged in the sampling box 2, and corresponding sampling tubes 5 are arranged in the heating sleeves 4. A nitrogen tank 6 is also arranged in the sampling box 2. The nitrogen tank 6 is communicated with the air inlet box 1. Air inlet conveying channels 15 and air outlet conveying channels 20 which are hermetically and correspondingly matched with the two ends of the sampling tubes 5 are respectively arranged in the air inlet box 1 and the air outlet box 3. Each sampling tube 5 is fixed by pressing through the air outlet box 3 and the air inlet box 1. Valves which are convenient to open or close are arranged on the nitrogen tank 6, the air inlet conveying channel 15 and the air outlet conveying channel 20. The air outlet box 3 has the same structure as the air inlet box 1. Locking structures are arranged between the air outlet box 3 and the sampling box 2, and between the air inlet box 1 and the sampling box 2. An air inlet pipe 7 which is convenient for air inlet is arranged on the air inlet box 1, and an air outlet pipe 8 which is convenient for air outlet is arranged on the air outlet box 3. Flow control valves 9 which can be opened and closed are arranged on both the air inlet pipe 7 and the air outlet pipe 8. The ends of the air inlet pipe 7 and the air outlet pipe 8 are both quick-insert structures; A replacement connecting pipe with a valve is also connected between the air inlet box 1 and the air outlet box 3.

[0032] In this embodiment, the air inlet box 1, the sampling box 2 and the air outlet box 3 are all cuboid structures with the same cross-sectional size and can be stacked in sequence and detachably installed and fixed. The locking structure includes groove seats 10 fixedly installed on the air inlet box 1 and the air outlet box 3 and a lock seat 11 fixed on the sampling box 2. A lock body 12 which rotates around a pin shaft fixed on the lock seat 11 is arranged on the lock seat 11. A buckle ring 13 corresponding to the groove seat 10 is hinged on the lock body 12. In this way, by buckling the buckle ring 13 on the groove seat 10 and then rotating the lock body 12 to make the lock body 12 cover the lock seat 11, the buckle ring 13 firmly buckles the groove seat 10, so that the air inlet box 1 is firmly pressed and fixed with the sampling box 2 or the air outlet box 3 is firmly pressed and fixed with the sampling box 2.

[0033] As Figure 2 shown, the air inlet box 1 includes an air inlet chamber 14. A plurality of air inlet conveying holes 141 are opened on the air inlet chamber 14. Each air inlet conveying hole 141 is correspondingly communicated with the air inlet conveying channel 15. An upper guiding inclined groove 16 for pressing and sealing the sampling tube 5 is opened at the lower end of the air inlet conveying channel 15. The air inlet pipe 7 is communicated with the air inlet chamber 14; The air inlet conveying holes 141 are respectively connected with valves, and the valves are connected with the corresponding air inlet conveying channels 15. In this way, the sampling gas can enter any one of the air inlet conveying channels 15. When the upper end of the sampling tube 5 contacts the upper guiding inclined groove 16, the connection and sealing of the upper end of the sampling tube 5 are completed. When sampling, a single sampling tube 5 is required for sampling. In this way, when sampling, only any one valve needs to be opened, and the sampling gas will enter the corresponding sampling tube 5, thus completing the sampling.

[0034] Further, the air outlet box 3 includes an air outlet chamber 17. A plurality of air outlet conveying holes 18 are formed in the air outlet chamber 17. Each air outlet conveying hole 18 is in one-to-one correspondence and communication with the air outlet conveying channel 20. A lower guiding inclined groove 19 for pressing and sealing the sampling tube 5 is formed at the upper end of the air outlet conveying channel 20. The air outlet pipe 8 is connected to the air outlet chamber 17. When the valve in the air inlet box 1 is opened, the valve in the corresponding air outlet box 3 also needs to be opened synchronously. After opening, the absorption filler in the sampling tube 5 absorbs volatile organic compounds, and the remaining gas is discharged from the sampling tube 5, then enters the air outlet chamber 17 through the air outlet conveying channel 20, and is discharged from the air outlet pipe 8. Since the structures of the air outlet box 3 and the air inlet box 1 are the same, the lower end of the sampling tube 5 contacts and seals with the lower guiding inclined groove 19, so that the sampling tube 5 is connected to the air outlet conveying channel 20. The air outlet conveying channel 20 is sequentially connected to the valve and the air outlet conveying hole 18.

[0035] As Figure 1 shown, the replacement connection pipe includes a first replacement pipe 27 communicating with the air inlet chamber 14 and a second replacement pipe 28 communicating with the air outlet chamber 17. Openable and closable valves and gas quick connectors 23 are provided on both the first replacement pipe 27 and the second replacement pipe 28. The valve is a ball valve 29, so that the first replacement pipe 27 and the second replacement pipe 28 can be quickly and conveniently closed. A connecting pipe 30 is provided between the first replacement pipe 27 and the second replacement pipe 28. Through the connecting pipe 30, the first replacement pipe 27 and the second replacement pipe 28 can be connected, and it does not affect the mutual disassembly between the air inlet box 1, the air outlet box 3 and the sampling box 2.

[0036] Further, both the lower guiding inclined groove 19 and the upper guiding inclined groove 16 are conical grooves. In this way, when installing the sampling tube 5, the sampling tube 5 can be adjusted along the inclined surface of the conical groove. When assembling the sampling tube 5, first, the sampling box 2 and the air outlet box 3 are effectively fixed. Then, the sampling tube 5 is sequentially placed into the heating sleeve 4. In this way, the lower end of the sampling tube 5 first contacts the lower guiding inclined groove 19. Then, the air inlet box 1 is installed on the sampling box 2. Since the sampling tube 5 is in an inclined state in the heating sleeve 4, when the upper guiding inclined groove 16 contacts the upper end of the sampling tube 5, the upper guiding inclined groove 16 will press down the sampling tube 5, so that the sampling tube 5 is adjusted in position and the sampling tube 5 can be in a vertical state. In this way, the sampling tube 5 forms an effective sealed connection with the air inlet conveying channel 15 and the air outlet conveying channel 20, and the installation of the sampling tube 5 is completed.

[0037] As Figure 3 shown, elastic gaskets 21 in contact with the sampling tube 5 are provided on both the upper guiding inclined groove 16 and the lower guiding inclined groove 19. The elastic gaskets 21 have a certain elasticity during installation, can further effectively press and seal both ends of the sampling tube 5, and improve the sampling efficiency.

[0038] As Figure 5 shown, a purge pipeline 22 extending into the intake chamber 14 is provided on the nitrogen gas tank 6, and a quick-connect structure for convenient disassembly and assembly is also provided on the purge pipeline 22; the nitrogen gas tank 6 and the sampling pipe 5 are jointly installed in the sampling box 2, which can effectively save space. The height of the heating sleeve 4 is less than the height of the sampling pipe 5. The purge pipeline 22 is a flexible pipe, and a valve for opening and closing is also provided on the purge pipeline 22. When the intake box 1 and the sampling box 2 are separated, the valve is closed, and the nitrogen gas tank 6 is disconnected from the intake chamber 14 through the quick-connect structure. When the intake box 1 and the sampling box 2 need to be installed together, only the nitrogen gas tank 6 and the intake chamber 14 need to be connected through the quick-connect structure. The quick-connect structure is a gas quick connector 23. A female head is provided at the nitrogen gas tank 6, and a male head adapted to the female head is provided outside the intake chamber 14, so that quick connection can be completed.

[0039] Further, the ends of the intake pipeline 7 and the outlet pipeline 8 are the same as the quick-connect structure of the above-mentioned purge pipeline 22. The gas quick connector 23 is an existing structure that can be purchased on the market, so it will not be described in detail in the text.

[0040] Further, the valves are all electromagnetic control valves 24. The opening and closing are accurately and effectively controlled by the electromagnetic control valves 24, which eliminates the cumbersome process of manually opening and closing one by one, improves efficiency, and a control screen 25 for controlling the opening and closing of the electromagnetic control valves 24 is provided on the intake box 1. Since sampling is carried out on each sampling pipe 5 one by one during sampling, the sampling sequence needs to be marked for convenient subsequent detection. The sampling pipe 5 and the electromagnetic control valve 24 can be displayed on the screen through the control screen 25 for convenient observation and operation, and the control screen 25 can also perform other operations, greatly improving work efficiency.

[0041] As Figure 1 shown, a handle 26 for convenient grasping is rotatably installed on the intake box 1. After collection, the entire storage box is moved. The sampling pipes 5 are all in the sampling box 2, which is convenient for storage and improves efficiency. However, since the sampling pipes 5 need to be stored and moved to a designated location for detection after sampling, the sampling pipes 5 in the storage box can provide effective protection. When moving, the entire storage box can be moved by grasping the handle 26, improving convenience.

[0042] The working principle of this embodiment is as follows: first, the air inlet pipe 7 is connected to the exhaust pipe, the exhaust pipe is placed at the sampling point, the air outlet pipe 8 is connected to the sampling pump, the flow control valve 9 is opened, and the first electromagnetic control valve 24 corresponding to the air inlet box 1 and the air outlet box 3 is opened through the control screen 25. The sampling pump works, and the sampled gas enters the air inlet chamber 14, and then enters the air inlet delivery channel 15 through the air inlet delivery hole 141. After the sampled gas passes through the sampling tube 5, the volatile organic matter is absorbed by the absorption filler in the sampling tube 5, and the remaining gas enters the air outlet delivery channel 20, and then enters the air outlet chamber 17, and is finally discharged from the air outlet pipe 8. Then, the first electromagnetic control valve 24 in the air inlet box 1 and the air outlet box 3 is closed, and the corresponding second electromagnetic control valve 24 is opened. The sampled gas enters the corresponding sampling tube 5. Repeat the above operation to open the valves in sequence and collect a sufficient number of sampling tubes 5. The sampling pump stops, and the air inlet pipe 7 is separated from the exhaust pipe; the storage box is moved as a whole to a clean environment, the ball valve 29 is opened and the sampling pump is started to continuously exhaust air, and the external clean Clean air enters the air inlet box 1, the first replacement pipe 27, the connecting pipe 30, the second replacement pipe 28 and the air outlet box 3. After replacing the sampled gas in the air inlet box 1 and the air outlet box 3, the ball valve 29 is closed, and then the flow control valve 9 is closed, and the sampling pump is disconnected. When testing, the air outlet pipe 8 and the air inlet pipe 7 are both connected to the detection instrument, and the heating sleeve 4 outside the designated sampling tube 5 is operated to heat it, and the volatile organic matter in the sampling tube 5 begins to volatilize, and the electromagnetic control valves 24 corresponding to the two ends of the sampling tube 5 are opened, and the volatile organic matter in the sampling tube 5 is separated from the absorption filler and discharged from the air outlet pipe 8. The air inlet pipe 7 will be supplemented with air to help the volatilized volatile organic matter to be discharged, thereby completing the detection; after the detection is completed, the air outlet pipe 8 and the air inlet pipe 7 are separated from the detection instrument, and then the cleaning and purging work can be carried out. All the heating sleeves 4 can be started to heat all the sampling tubes 5, and the electromagnetic control valve 24 on the nitrogen tank 6 is opened, and nitrogen is purged, so that all the volatile organic matter in the sampling tube 5 is purged and discharged.

[0043] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A storage box for volatile organic compound sampling tubes, characterized in that: It includes a storage box body, and the storage box body includes an intake box, a sampling box and an outlet box. The outlet box, the sampling box and the intake box are stacked and detachably installed and fixed in sequence. A number of heating sleeves are provided in the sampling box, and corresponding sampling tubes are provided in the heating sleeves. A nitrogen gas tank is also provided in the sampling box, and the nitrogen gas tank is communicated with the intake box. An intake conveying channel and an outlet conveying channel which are hermetically and correspondingly matched with the two ends of the sampling tubes are respectively provided in the intake box and the outlet box. Each sampling tube is fixed by being pressed by the outlet box and the intake box. Valves which are convenient to open or close are provided on the nitrogen gas tank, the intake conveying channel and the outlet conveying channel. The outlet box has the same structure as the intake box. A locking structure is provided between the outlet box and the sampling box, and between the intake box and the sampling box. An intake pipe which is convenient for intake is provided on the intake box, and an outlet pipe which is convenient for outlet is provided on the outlet box. Flow control valves which can be opened and closed are provided on both the intake pipe and the outlet pipe. The ends of the intake pipe and the outlet pipe are both quick-insert structures; A replacement connecting pipe with a valve is also connected between the intake box and the outlet box; The intake box includes an intake chamber, and a number of intake conveying holes are opened on the intake chamber. Each intake conveying hole is correspondingly communicated with the intake conveying channel one by one. An upper guiding inclined groove for pressing and sealing the sampling tube is opened at the lower end of the intake conveying channel, and the intake pipe is communicated with the intake chamber; The outlet box includes an outlet chamber, and a number of outlet conveying holes are opened in the outlet chamber. Each outlet conveying hole is correspondingly communicated with the outlet conveying channel one by one. A lower guiding inclined groove for pressing and sealing the sampling tube is opened at the upper end of the outlet conveying channel, and the outlet pipe is communicated with the outlet chamber; A handle which is convenient to grasp is rotatably installed on the intake box.

2. The preservation box for a volatile organic compound sampling tube according to claim 1, characterized in that: Elastic gaskets which are in contact with the sampling tubes are provided on both the upper guiding inclined groove and the lower guiding inclined groove.

3. The preservation box for a volatile organic compound sampling tube as described in claim 1, characterized in that: A purging pipe which extends into the intake chamber is provided on the nitrogen gas tank, and a quick-insert structure which is convenient for disassembly and assembly is also provided on the purging pipe.

4. A storage box for volatile organic compound sampling tubes as described in claim 3, characterized in that: All the valves are electromagnetic control valves.

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