Full-automatic farmland greenhouse gas sampling device

Abstract

The utility model relates to the technical field of gas research equipment, in particular to a full-automatic farmland greenhouse gas sampling device which comprises a static box, a base, an automatic gas collector communicated with the static box through a pipeline, a sucking pump fixedly arranged in the middle of the pipeline, and a controller for integrally controlling the whole device, the automatic gas collector comprises a support, a sample holder fixedly arranged at the bottom of the support, a bidirectional sliding table fixedly arranged at the top of the support and a gas transmission assembly fixedly arranged on the bidirectional sliding table, and the gas transmission assembly comprises a shell fixedly connected with the bidirectional sliding table and an automatic injector fixedly installed in the shell; the static box comprises a box body with a completely-opened bottom and an electromagnetic valve fixedly arranged at the top of the box body, and the electromagnetic valve is sequentially communicated with an air extracting pump and an automatic injector through pipelines; according to the scheme, the technical problems of long time consumption and easiness in causing human factor errors when the farmland greenhouse gas is sampled by a static box method can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas research equipment technical field, concretely is a kind of full-automatic farmland greenhouse gas sampling device. BACKGROUND

[0002] Farmland ecosystem is an important source of greenhouse gas emissions, different crops and different agricultural management measures will affect the emission of farmland greenhouse gas. Therefore, the effective collection of farmland greenhouse gas is the basis and prerequisite for accurately determining the emission of farmland greenhouse gas. The existing farmland greenhouse gas collection method is mainly artificial collection static box method, which has many deficiencies. The traditional static box method is single-point sampling, usually sampling 4 times at 0, 10, 20, 30 minutes, which takes more than 30 minutes. This method not only takes a long time, but also causes large human error due to frequent human intervention. UTILITY MODEL CONTENT

[0003] The utility model provides a kind of full-automatic farmland greenhouse gas sampling device, can solve the technical problem of long time consumption and easy to cause human error when sampling farmland greenhouse gas by static box method.

[0004] The present application provides the following technical solutions:

[0005] A kind of full-automatic farmland greenhouse gas sampling device, including static box, pedestal, automatic gas collector with static box between through pipeline communication, suction pump fixedly arranged in the pipeline middle, controller for integrated control entire device;The automatic gas collector includes support, sample holder fixedly arranged at the bottom of the support, bidirectional sliding table fixedly arranged at the top of the support, gas delivery assembly fixedly arranged on the bidirectional sliding table, the gas delivery assembly includes the shell fixedly connected with bidirectional sliding table, automatic injector fixedly installed in the shell;The static box includes the box body of bottom completely opening, electromagnetic valve fixedly arranged at the top of the box body, the electromagnetic valve is sequentially communicated with suction pump, automatic injector by pipeline, the pedestal includes support base, ground spike fixedly connected with the bottom of the support base, recess is opened for the edge of box bottom insertion at the top of the support base;Timing module is arranged in the controller.

[0006] Advantages:

[0007] 1, sampling process adopts automatic control, saves manpower, and error is small: through the timing module in the controller, the controller can automatically control the operation of automatic gas collector, suction pump, electromagnetic valve and the like at predetermined time point, realizes the automatic collection of gas sample in static box and can collect multiple samples at different time points, without frequent human intervention. This programmed automatic control process greatly saves manpower and improves sampling efficiency.

[0008] 2. Ensure the stability of the sampling device and the accuracy of the collected gas sample: The ground nails at the bottom of the base can be firmly fixed in the soil, so that the static box can be used stably in different geographical environments (such as different types of soil, terrain), and the adaptability and reliability of the device are enhanced. The groove opened at the top of the support seat is used for water sealing, which ensures the sealing between the bottom of the static box and the base, prevents the mixing of external gas, ensures the purity and accuracy of the gas sample, and improves the reliability of the sampling result.

[0009] Through the above design, the scheme not only realizes automatic sampling and saves manpower, but also reduces human error. Furthermore, through the design of the ground nails at the bottom of the base and the water seal, the stability in multiple geographical environments and the accuracy of the gas sample are ensured. These improvements significantly improve the efficiency and reliability of farmland greenhouse gas sampling, providing strong support for accurate determination of farmland greenhouse gas emissions.

[0010] Further, as an improvement, the bidirectional sliding table is an X-Z axis sliding table driven by a servo motor, including an X-axis sliding rail, a Z-axis sliding rail, an X-axis sliding table slidingly connected with the X-axis sliding rail, and a Z-axis sliding table slidingly connected with the Z-axis sliding rail.

[0011] Beneficial effect: The addition of the X-Z axis sliding table provides power for the operation of the automatic gas collector, ensuring accurate collection and preservation of the gas sample. The precise control of the servo motor enables the X-axis sliding table and the Z-axis sliding table to move accurately to the designated position, avoiding inaccurate sampling caused by mechanical errors, thereby improving the automation level of the entire sampling process and the reliability of the data.

[0012] Further, as an improvement, the automatic injector includes a barrel, a needle fixed at the bottom of the barrel, a piston slidingly connected with the barrel, a piston rod fixedly connected with the piston, a screw rod rotationally connected with the end of the piston rod away from the piston, a rotating seat threadedly connected with the screw rod, and a micro motor for driving the screw rod. The output end of the micro motor is fixedly connected with the screw rod.

[0013] Beneficial effect: By controlling the forward and reverse rotation of the micro motor to drive the upward and downward movement of the piston, the gas injection process is accurately controlled, ensuring accurate collection and preservation of the gas sample. The precise control of the micro motor improves the automation level and reliability of the sampling, reduces the influence of human factors, and ensures the accuracy and consistency of the data.

[0014] Further, as an improvement, the bracket includes a square bottom plate, side plates erected on both sides of the bottom plate, and a sample holder fixedly arranged between the two side plates. A plurality of mounting holes for storing headspace bottles are formed on the sample holder, and a pressing assembly for pressing the headspace bottles is fixedly arranged on both sides of the mounting holes.

[0015] Beneficial effects: By setting the pressing assembly, it ensures that the headspace bottle will not be separated from the sample rack when the needle is withdrawn from the headspace bottle, improves the stability and reliability of sampling, and avoids the problems of sample loss and inaccurate data caused by loose or falling headspace bottles.

[0016] Further, as an improvement, the air suction pump comprises air suction pump one for collecting gas in the static tank and air suction pump two for evacuating gas in the automatic syringe.

[0017] Beneficial effects: By evacuating the remaining gas in the pipeline after the end of the first sampling process through air suction pump two, it ensures the accuracy of the second sampling, avoids the interference of residual gas on the subsequent sampling results, and improves the reliability and consistency of the sampling data.

[0018] Further, as an improvement, the controller is electrically connected with air suction pump one, air suction pump two, micro motor for driving screw, servo motor for driving bidirectional sliding table, and electromagnetic valve respectively, and the electrical connection is connected by wires.

[0019] Beneficial effects: The electrical connection is connected by wires. This design is more stable and reliable than the wireless connection mode, and will not be disturbed by the complex outdoor environment, ensuring the normal operation of the control system in various environments and the accuracy of data transmission. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the first embodiment of the full-automatic farmland greenhouse gas sampling device of the utility model;

[0021] Figure 2 is Figure 1 an enlarged schematic view of position A;

[0022] Figure 3 is Figure 1 an enlarged schematic view of position B;

[0023] Figure 4 is Figure 1 an enlarged schematic view of position C;

[0024] Figure 5 is Figure 1 a structural schematic view of the automatic syringe part. DETAILED DESCRIPTION

[0025] The following will be further described in detail through specific embodiments:

[0026] The marks in the drawings of the specification include: static box 1, box body 101, electromagnetic valve 102, support seat 103, ground nail 104, groove 105, water 106, soil 107, base 2, automatic gas collector 3, sample holder 301, bottom plate 302, side plate 303, headspace bottle 304, support rod 305, pressing rod 306, X-axis slide rail 307, Z-axis slide rail 308, X-axis slide table 309, Z-axis slide table 310, shell 311, barrel 312, needle 313, piston 314, piston rod 315, screw 316, rotating seat 317, micro motor 318, ball bearing 319, air pump one 4, air pump two 5, controller 6, pipeline 7, wire 8.

[0027] Example one

[0028] As Figures 1-5 shown, a fully automatic farmland greenhouse gas sampling device, comprising a static box 1 and a base 2, further comprising an automatic gas collector 3 communicated with the static box 1 through a pipeline 7, an air pump one 4 and an air pump two 5 fixedly arranged in the pipeline 7, a controller 6 for integrated control of the whole device.

[0029] The static box 1 includes a bottom completely open box body 101, an electromagnetic valve 102 fixedly arranged at the top of the box body 101. The box body 101 is a cuboid structure made of organic glass material, with length, width and height of 500mm*500mm*700mm; below the box body 101 is the base 2, which includes a quadrilateral support seat 103 and a ground nail 104 fixedly welded at the bottom of the support seat 103; a groove 105 is opened at the top of the support seat 103 for the bottom edge of the box body 101 to be inserted, when the bottom of the box body 101 is inserted into the groove 105, about 50mm of water 106 is poured into the groove 105 to achieve the effect of sealing the connection between the box body 101 and the support seat 103; the ground nail 104 is completely inserted into the soil 107 to fix the base 2 and close the bottom opening of the box body 101, with an insertion depth of 150mm; an air exhaust hole is opened at the top of the box body 101, and an electromagnetic valve 102 is fixedly installed at the air exhaust hole position for opening and closing the air exhaust hole. The other end of the electromagnetic valve 102 is installed with a pipeline 7 sequentially communicated to an air pump one 4 and an automatic gas collector 3, the function of the air pump one 4 is to pump the gas in the static box 1 to the automatic gas collector 3 for sampling and preservation.

[0030] The automatic gas collector 3 comprises a support for supporting and mounting, a sample rack 301 fixedly arranged at the bottom of the support, a bidirectional sliding table fixedly arranged at the top of the support, and a gas conveying assembly fixedly arranged on the bidirectional sliding table. The support comprises a square bottom plate 302, side plates 303 erected on both sides of the bottom plate 302, and the sample rack 301 is welded and fixed above the bottom and between the side plates 303 on both sides. Four installation holes for storing headspace bottles 304 are formed on the sample rack 301, the caps of the headspace bottles 304 are placed upwards in the installation holes, and a pressing assembly for pressing the headspace bottles 304 is fixedly arranged on both sides of each installation hole on the sample rack 301. In this embodiment, the pressing assembly comprises a support rod 305 welded and fixed at the bottom of the sample rack 301 and a pressing rod 306 hinged to the top of the support rod 305, and the pressing rod 306 can rotate parallel to the upper surface of the bracket with the support rod 305 as the axis. When the end of the pressing rod 306 is pushed above the headspace bottle 304, the vertical movement of the headspace bottle 304 can be limited. The bidirectional sliding table is an X-Z axis sliding table 309 driven by a servo motor, which comprises an X-axis sliding rail 307, a Z-axis sliding rail 307, an X-axis sliding table 309 slidably connected with the X-axis sliding rail 307, and a Z-axis sliding table 309 slidably connected with the Z-axis sliding rail 307. The X-Z axis sliding table 309 is a prior art, which will not be described in detail herein. The gas conveying assembly is specifically installed on the Z-axis sliding table 309, and the gas conveying assembly comprises a shell 311 screwed on the Z-axis sliding table 309, an automatic syringe fixedly installed in the shell 311, the automatic syringe comprising a cylinder 312, a needle 313 fixedly connected with the bottom of the cylinder 312, a piston 314 slidably connected with the cylinder 312, a piston rod 315 fixedly connected with the piston 314, a screw rod 316 rotatably connected with one end of the piston rod 315 away from the piston 314, a rotating seat 317 threadedly connected with the screw rod 316, and a micro motor 318 for driving the screw rod 316. A pipeline 7 is arranged between the gas suction pump one 4 and the cylinder 312, and a gas suction pump two 5 is further arranged on the pipeline 7 between the gas suction pump one 4 and the cylinder 312, and the gas suction pump two 5 is used for pumping the residual gas in the pipeline 7. The output end of the micro motor 318 is fixedly connected with the screw rod 316, and a ball bearing 319 is arranged between the screw rod 316 and the piston rod 315, wherein the screw rod 316 is fixedly connected with the inner circle of the ball bearing 319, and the piston rod 315 is fixedly connected with the outer circle of the ball bearing 319. When the micro motor 318 drives the screw rod 316 to rotate, the piston rod 315 and the piston 314 will move upwards or downwards, and the gas in the cylinder 312 will be extruded to be conveyed out of the needle 313 during the downward movement of the piston 314.

[0031] The role of the controller 6 is to integrate the control of the entire device, in this embodiment, a PLC with a built-in timing module is selected, the controller 6 is electrically connected with the air pump one 4, the air pump two 5, the micro motor 318 for driving the screw rod 316, the servo motor for driving the bidirectional sliding table, and the electromagnetic valve 102, and the electrically connected mode is connected by the wire 8. Compared with the wireless connection mode, the electrically connected mode connected by the wire 8 is more stable and reliable, and will not be disturbed by the complex outdoor environment.

[0032] It should be noted that, for the convenience of distinguishing, the pipeline 7 involved in this embodiment is indicated by the thick solid line shown in Figure 1 , and the wire 8 is indicated by the thin solid line shown in Figure 1 .

[0033] The specific application process is as follows:

[0034] In use, first, the four headspace bottles 304 are respectively placed into the mounting holes, and the pressing rod 306 is rotated by being pulled to cover and press the headspace bottles 304 above; then the static tank 1 is covered on the area where the crops are located, specifically, the ground nails 104 are completely buried in the soil 107, and when the tank body 101 is inserted onto the groove 105 on the support seat 103, about 50mm height of water 106 is poured into the groove 105 to provide a relatively sealed environment for the gas inside the static tank 1; then the built-in program of the controller 6 is run; the controller 6 controls the X-axis sliding table 309 to drive the automatic injector to move from the initial position to above the first headspace bottle 304 along the X-axis sliding rail 307; the controller 6 continues to control the Z-axis sliding table 309 to drive the automatic injector to move downward along the Z-axis sliding rail 307, so that the needle 313 pierces the cap of the first headspace bottle 304 and extends into the bottle body, the controller 6 continues to control the electromagnetic valve 102 to open to open the air hole at the top of the tank body 101, and starts the air pump one 4 to pump the gas in the tank body 101 into the cylinder 312, and after the air pump runs for 2 seconds, the gas sample has filled the cylinder 312, and it is observed that the piston 314 is located at the top of the cylinder 312; the controller 6 continues to control the micro motor 318 to drive the screw rod 316 and drive the piston rod 315 and the piston 314 to move downward, and in the process of moving downward of the piston 314, the gas in the cylinder 312 is squeezed to be transported to the headspace bottle 304 outside the needle 313 and saved, and the transportation process is maintained for 3 seconds; the controller 6 controls the ZX-axis sliding table 309 to drive the automatic injector to reset, controls the electromagnetic valve 102 to close the air hole, and then controls the air pump two 5 to pump out the residual gas sample in the pipeline 7, and thus the first sampling process is completed; 10 minutes after the first sampling process is completed, the second sampling is carried out, and the third sampling is carried out after 20 minutes, and the fourth sampling is carried out after 30 minutes, and the obtained gas samples are saved into different headspace bottles 304.

[0035] Example two

[0036] The difference between the embodiment and the embodiment one is that the air extraction pump two 5 is not additionally arranged, and the air extraction pump one 4 is changed into a bidirectional air extraction pump with external air exhaust function.

[0037] The above is only an embodiment of the utility model, and the utility model is not limited to the field involved in the embodiment, and the common knowledge such as specific structures and properties in the scheme is not described too much herein. It should be pointed out that for those skilled in the art, without departing from the structure of the utility model, a number of modifications and improvements can be made, and these should also be considered as the protection scope of the utility model, and these will not affect the effect and practicability of the utility model. The protection scope required by the application should be subject to the content of the claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A fully automatic farmland greenhouse gas sampling device comprising a static chamber and a base, characterized in that: The automatic gas collector is in communication with the static box through a pipeline, a suction pump is fixedly arranged in the pipeline, and a controller is arranged for integrated control of the whole device. The automatic gas collector comprises a support, a sample rack fixedly arranged at the bottom of the support, a bidirectional sliding table fixedly arranged at the top of the support, and a gas conveying assembly fixedly arranged on the bidirectional sliding table. The static box comprises a box with an entirely open bottom and an electromagnetic valve fixedly arranged at the top of the box. A timing module is arranged in the controller. 2.The automatic farmland greenhouse gas sampling device according to claim 1, wherein: The bidirectional sliding table is an X-Z axis sliding table driven by a servo motor and comprises an X-axis sliding rail, a Z-axis sliding rail, an X-axis sliding table in sliding connection with the X-axis sliding rail, and a Z-axis sliding table in sliding connection with the Z-axis sliding rail. 3.The automatic farmland greenhouse gas sampling device according to claim 2, characterized in that: The automatic injector comprises a barrel, a needle fixedly arranged at the bottom of the barrel, a piston in sliding cooperation with the barrel, a piston rod fixedly connected with the piston, a screw rod in rotary connection with the end of the piston rod away from the piston, a rotary seat in threaded connection with the screw rod, and a micro motor for driving the screw rod. 4.The automatic farmland greenhouse gas sampling device according to claim 3, characterized in that: The support comprises a square bottom plate and side plates arranged on both sides of the bottom plate, and the sample rack is fixedly arranged between the side plates. 5.The automatic farmland greenhouse gas sampling device according to claim 4, characterized in that: The suction pump comprises a first suction pump for collecting gas in the static box and a second suction pump for pumping gas in the automatic injector. 6.The automatic farmland greenhouse gas sampling device according to claim 5, characterized in that: The controller is electrically connected with the first suction pump, the second suction pump, the micro motor for driving the screw rod, the servo motor for driving the bidirectional sliding table, and the electromagnetic valve.

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