Automatic soil greenhouse gas collection static box

Abstract

The utility model relates to the technical field of agricultural ecological environment, and discloses an automatic soil greenhouse gas collection static box which comprises a box body and a base, a heat preservation layer is sleeved on the box body, an air pump is arranged in the box body, and an air inlet pipe and an air outlet pipe are arranged on the air pump; the air inlet end of the air inlet pipe is connected with a dehumidification pipe, the dehumidification pipe is provided with a containing pipe section and contraction pipe sections located at the two ends of the containing pipe section, and the diameter of the containing pipe section is larger than that of the contraction pipe sections; the accommodating pipe section is filled with a drying agent; the box body is provided with a gas collecting bag, and a gas conveying pipe is arranged between the gas collecting bag and the gas outlet pipe. The purpose of the utility model is to dehumidify gas entering a collection bag and improve the precision of subsequent gas detection.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of agricultural ecological environment, specifically relates to a kind of automatic collection static box of soil greenhouse gas. BACKGROUND

[0002] Static chamber method is widely used in the synchronous monitoring of the greenhouse gas emission flux of terrestrial ecosystem due to its strong adaptability, simple structure and operation, low cost and high sensitivity.

[0003] The existing static chamber is usually directly transported into the gas in the box to the gas collection bag when using, without dehumidifying operation, resulting in a large amount of water vapor in the collected gas, if the oxygen isotope of carbon dioxide is measured subsequently, the oxygen isotope in water will affect the measurement result, resulting in measurement error.

[0004] Therefore, the present inventors have conducted in-depth research on the above-mentioned defects in the prior art, and thus the present case is produced. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a kind of automatic collection static box of soil greenhouse gas, which can dehumidify the gas entering the collection bag, improve the precision of subsequent gas detection.

[0006] To achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] A kind of automatic collection static box of soil greenhouse gas, including box and base, the box is sleeved with heat preservation layer, the box is equipped with gas pump, the gas pump is equipped with inlet pipe and outlet pipe;The inlet end of the inlet pipe is connected with dehumidification pipe, the dehumidification pipe has containing pipe section and shrink tube section at both ends of containing pipe section, the diameter of containing pipe section is greater than the diameter of shrink tube section;The containing pipe section is filled with drying agent;The box is equipped with gas collection bag, and gas conveying pipe is arranged between the gas collection bag and the outlet pipe.

[0008] Further, the drying agent is anhydrous calcium chloride, and the containing pipe section is also filled with color-changing silica gel. The color change of the color-changing silica gel indicates whether the drying agent and the color-changing silica gel need to be replaced.

[0009] Further, the collecting bag and the gas conveying pipe are provided with a plurality of; the pipeline converter is further provided between the gas conveying pipe and the gas outlet pipe; the pipeline converter comprises a shell, a conversion block rotatably installed in the shell and a motor for driving the conversion block to rotate; the bottom of the shell is formed with an air inlet connecting pipe connected with the gas outlet pipe, the top of the shell is formed with a plurality of air outlet connecting pipes respectively communicated with the conveying pipes, the bottom of the conversion block is formed with a gas containing cavity communicated with the air inlet connecting pipe, and the conversion block is further provided with a gas conversion channel, one end of the gas conversion channel is communicated with the gas containing cavity, and the other end of the gas conversion channel is communicated with the air outlet connecting pipes in sequence. The pipeline converter can sequentially convey the gas into different collecting bags in time periods, so that the gas in different time periods is collected and analyzed, and the detection accuracy is further improved.

[0010] Further, the conversion block is in a cylindrical shape, the bottom of the conversion block is in sealed sliding contact with the inner bottom wall of the shell, and the top of the conversion block is in sealed sliding contact with the inner top wall of the shell; and the motor is fixedly connected to the top of the shell. The conversion block and the inner bottom wall and the inner top wall of the shell are in sealed sliding contact, so that the plurality of air outlet connecting pipes can be effectively separated.

[0011] Further, the shell is further provided with an air inlet fan. The air inlet fan can keep the air in the shell circulating, so as to simulate the ventilation condition in the natural environment and reduce the disturbance of the static box to the environment.

[0012] Further, the base comprises a positioning cylinder which can be inserted into the soil, an annular water tank is arranged on the outer wall of the positioning cylinder, the bottom of the shell is arranged on the outer wall of the positioning cylinder, and the bottom of the shell is in contact with the bottom of the annular water tank; and a sealing ring is further arranged on the outer wall of the positioning cylinder. Water is added into the annular water tank, and the water is used as a sealing medium, so that the sealing performance of the shell is improved.

[0013] Further, an annular water tank is further arranged on the outer wall of the shell, the annular water tank is located above the annular water tank, the bottom of the annular water tank is formed with a plurality of water permeation holes, and an annular cover plate is arranged on the annular water tank and formed with a plurality of water injection holes. The annular water tank can be used for timely supplementing water to the annular water tank, so that the sealing effect is not lost due to volatilization of water in the annular water tank in summer.

[0014] Compared with the prior art, the soil greenhouse gas automatic collecting static box can automatically convey the gas in the shell into the collecting bag through the control of the air pump, the air inlet end of the air inlet pipe of the air pump is connected with a dehumidification pipe, and a drying agent is added into the dehumidification pipe, so that the gas taken into the collecting bag is dehumidified first, the water in the gas is removed, and the precision of subsequent detection of the gas is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the bottom structure of the box in this utility model;

[0019] Figure 4 This is a schematic diagram of the base structure in this utility model;

[0020] Figure 5 This is a schematic diagram of the dehumidification pipe in this utility model;

[0021] Figure 6 This is a schematic diagram of the pipe converter in this utility model;

[0022] Figure 7 for Figure 6 A cross-sectional schematic diagram.

[0023] The symbols of the main components are explained as follows: 1. Box body, 11. Insulation layer, 12. Annular water tank, 121. Drain hole, 13. Annular cover plate, 131. Water injection hole, 2. Base, 21. Positioning cylinder, 211. Sealing ring, 22. Annular water trough, 3. Air pump, 31. Air inlet pipe, 32. Air outlet pipe, 4. Dehumidification pipe, 41. Receiving pipe section, 42. Shrinkage pipe section, 43. Desiccant, 44. Color-changing silica gel, 5. Collection bag, 6. Gas delivery pipe, 7. Pipe converter, 71. Shell, 711. Air inlet connection pipe, 712. Air outlet connection pipe, 72. Conversion block, 721. Gas receiving cavity, 722. Gas conversion channel, 73. Motor, 8. Air intake fan. Detailed Implementation

[0024] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. Furthermore, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0025] like Figures 1-7As shown, the utility model relates to a kind of automatic collection static box of soil greenhouse gas, including box 1 and base 2, box 1 is equipped with heat preservation layer 11, can keep warm in winter, can heat insulation in summer, provide a relatively constant temperature state for box 1, gas pump 3 is equipped in box 1, and gas inlet pipe 31 and air outlet pipe 32 are equipped on gas pump 3;Gas inlet pipe 31 is connected with dehumidification pipe 4 in gas inlet end, dehumidification pipe 4 has accommodating pipe section 41 and shrink tube section 42 located in the both ends of accommodating pipe section 41, and the diameter of accommodating pipe section 41 is greater than the diameter of shrink tube section 42;Desiccant 43 is filled in accommodating pipe section 41;Box 1 is equipped with gas collection bag 5, and gas conveying pipe 6 is equipped between gas collection bag 5 and air outlet pipe 32.Specifically, desiccant 43 is anhydrous calcium chloride, and anhydrous calcium chloride has very strong hygroscopicity, can absorb moisture in air, and the moisture absorption rate is 8-15 times of ordinary desiccant, can rapidly absorb moisture in surrounding environment and change into gel, reach adsorption dehumidification effect;Accommodating pipe section 41 is also filled with color-changing silica gel 44, color-changing silica gel 44 is blue in dry state, pink after absorbing moisture, and silica gel has lost hygroscopic efficiency, needs to be dried and replaced, so whether to replace desiccant and color-changing silica gel is indicated by the color change of color-changing silica gel.

[0026] Since the greenhouse gas emission is in dynamic change within 24 hours, the difference between the peak and the trough can be very large, therefore, multiple collecting bags 5 and gas conveying pipes 6 are provided in the present embodiment; a pipe converter 7 is further provided between the gas conveying pipes 6 and the gas outlet pipe 32, a support plate is provided on the inner wall of the box 1, and the pipe converter 7 is fixedly installed on the support plate; the pipe converter 7 comprises a shell 71, a conversion block 72 rotatably installed in the shell 71, and a motor 73 for driving the conversion block 72 to rotate; the bottom of the shell 71 is formed with an air inlet connecting pipe 711 connected with the gas outlet pipe 32, the top of the shell 71 is formed with multiple air outlet connecting pipes 712 respectively in communication with the conveying pipes, the bottom of the conversion block 72 is formed with a gas containing cavity 721 in communication with the air inlet connecting pipe 711, and the conversion block 72 is further provided with a gas conversion channel 722, one end of the gas conversion channel 722 is in communication with the gas containing cavity 721, and the other end is in turn in communication with the air outlet connecting pipes 712. The pipe converter 7 can be used to sequentially convey the gas into different collecting bags 5 in time periods, which facilitates the collection of the gas in different time periods and then the analysis, and further improves the accuracy of the detection; specifically, the conversion block 72 is in a cylindrical shape, a rubber layer can be attached to the top and the bottom of the conversion block 72, the bottom of the conversion block 72 is in sealing sliding contact with the inner bottom wall of the shell 71, and the top of the conversion block 72 is in sealing sliding contact with the inner top wall of the shell 71; the motor 73 is fixedly connected to the top of the shell 71. The sliding sealing contact of the conversion block 72 with the inner bottom wall and the inner top wall of the shell 71 can effectively separate the multiple air outlet connecting pipes 712. A storage battery, a temperature and humidity sensor, and a timing controller are further installed in the box 1, the temperature and humidity sensor is used to determine the temperature and humidity of the static box 1 and the soil in the process of collecting the greenhouse gas; generally, the gas needs to be collected between 9:00-10:00 in the morning, and because the carbon flux needs to be calculated, the gas in 3-5 time periods needs to be collected for determination, therefore, the timing controller can be used to control the motor 73 to rotate once every interval time period to make the gas conversion channel 722 in turn in communication with the air outlet connecting pipes 712, and to control the start and stop of the air pump 3. In addition, multiple static boxes need to be used for gas collection at the same time in specific use.

[0027] In the present embodiment, an air inlet fan 8 is further provided in the box 1. The air inlet fan 8 can be used to maintain the air circulation in the box 1 to simulate the ventilation condition in the natural environment and reduce the disturbance of the static box to the environment. The fan is used to mix the gas in the static box 1 uniformly. In addition, when the gas sampling is performed, it is very important to ensure the consistency of the gas components in the box 1, and the fan can avoid the stratification of the gas by stirring the air, so that the collected gas sample is more representative and accurate.

[0028] In the embodiment, the base 2 comprises a positioning cylinder 21 which can be inserted into the soil, an annular water groove 22 is arranged on the outer wall of the positioning cylinder 21, the bottom of the box 1 is sleeved on the outer wall of the positioning cylinder 21, and the bottom of the box 1 is in contact with the groove bottom of the annular water groove 22; and a sealing ring 211 is further arranged on the outer wall of the positioning cylinder 21. Water is added into the annular water groove 22, and the water is used as a sealing medium, so that the sealing property of the box 1 is improved.

[0029] In summer, the water in the annular water groove 22 evaporates quickly due to high temperature, in order to avoid the sealing effect being reduced due to the evaporation of the water, an annular water tank 12 is further arranged on the outer wall of the box 1, the annular water tank 12 is located above the annular water groove 22, a plurality of water permeation holes 121 are formed in the bottom of the annular water tank 12; an annular cover plate 13 is arranged on the annular water tank 12, and a plurality of water injection holes 131 are formed in the annular cover plate 13. In summer, a certain amount of water is first injected into the annular water groove 22 for sealing, then the annular water tank 12 is continuously filled with water, and in the process of use, the water in the annular water tank 12 can slowly permeate into the annular water groove 22 to supplement the evaporated water, so that the water in the annular water groove 22 is maintained at a certain amount, and the sealing effect is avoided from being reduced; and in winter, a small amount of water or no water is injected into the annular water tank 12 due to slow evaporation of the water.

[0030] The working process of the utility model is as follows: firstly, the base 2 is inserted into the soil, then the box 1 is covered on the base 2, and water is injected into the annular water groove 22, if necessary, water can be injected into the annular water tank 12 to supplement the water in the annular water groove 22, when the gas is extracted, the gas is extracted into the collecting bag 5 after being dehumidified by the dehumidification pipe 4 by using the gas pump 3, and in the process of extraction, the gas is sequentially transported into different collecting bags 5 by using the pipeline converter 7 in time periods.

[0031] The soil greenhouse gas automatic collection static box provided by the utility model is introduced in detail. The description of the specific embodiment is only used for helping understanding the method and the core idea of the utility model. It should be pointed out that the utility model can be improved and modified by the ordinary skilled in the art without departing from the principle of the utility model, and the improvement and modification also fall into the protection range of the utility model claim.

Claims

1. An automatic collection static box for soil greenhouse gas, comprising a box body (1) and a base (2), an insulation layer (11) is sleeved on the box body (1), characterized in that: The box (1) is internally provided with an air pump (3), the air pump (3) is provided with an air inlet pipe (31) and an air outlet pipe (32); the air inlet end of the air inlet pipe (31) is connected with a dehumidification pipe (4), the dehumidification pipe (4) has a containing pipe section (41) and shrink pipe sections (42) located at both ends of the containing pipe section (41), the diameter of the containing pipe section (41) is greater than that of the shrink pipe section (42); the containing pipe section (41) is filled with a desiccant (43); the box (1) is provided with a gas collection bag (5), and a gas conveying pipe (6) is arranged between the gas collection bag (5) and the air outlet pipe (32).

2. The automatic soil greenhouse gas collection static chamber according to claim 1, characterized in that: The desiccant (43) is anhydrous calcium chloride; the containing pipe section (41) is further filled with a color-changing silica gel (44).

3. The automatic soil greenhouse gas collection static chamber according to claim 1, wherein: The collection bag (5) and the gas conveying pipe (6) are both provided with a plurality of; a pipeline converter (7) is further arranged between the gas conveying pipe (6) and the air outlet pipe (32); the pipeline converter (7) comprises a shell (71), a conversion block (72) rotatably installed in the shell (71) and a motor (73) for driving the conversion block (72) to rotate; the bottom of the shell (71) is formed with an air inlet connecting pipe (711) connected with the air outlet pipe (32), the top of the shell (71) is formed with a plurality of air outlet connecting pipes (712) respectively communicated with the conveying pipes (6), the bottom of the conversion block (72) is formed with a gas containing cavity (721) communicated with the air inlet connecting pipe (711), and the conversion block (72) is further provided with a gas conversion channel (722), one end of the gas conversion channel (722) is communicated with the gas containing cavity (721), and the other end can be sequentially communicated with the air outlet connecting pipes (712).

4. The automatic soil greenhouse gas collection static chamber according to claim 3, characterized in that: The conversion block (72) is in a cylindrical shape, the bottom of the conversion block (72) is in sealed sliding contact with the inner bottom wall of the shell (71), and the top of the conversion block (72) is in sealed sliding contact with the inner top wall of the shell (71); and the motor (73) is fixedly connected to the top of the shell (71).

5. The automatic soil greenhouse gas collection static chamber according to claim 4, characterized in that: The box (1) is further provided with an air inlet fan (8).

6. The automatic soil greenhouse gas collection static chamber according to claim 1, wherein: The base (2) comprises a positioning cylinder (21) which can be inserted into soil, an annular water tank (22) is arranged on the outer wall of the positioning cylinder (21), the bottom of the box (1) is sleeved on the outer wall of the positioning cylinder (21), and the bottom of the box (1) is in contact with the bottom of the annular water tank (22); and a sealing ring (211) is further arranged on the outer wall of the positioning cylinder (21).

7. The automatic soil greenhouse gas collection static chamber according to claim 6, characterized in that: An annular water tank (12) is further arranged on the outer wall of the box (1), the annular water tank (12) is located above the annular water tank (22), and the bottom of the annular water tank (12) is formed with a plurality of water permeation holes (121); an annular cover plate (13) is arranged on the annular water tank (12), and a plurality of water injection holes (131) are formed in the annular cover plate (13).

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