CN-224216660-U - Device for collecting greenhouse gas in greenhouse

Abstract

The utility model discloses a device for collecting greenhouse gases in a greenhouse, which solves the technical problem that the existing gas concentration detection method is difficult to be applied to the greenhouse, and the greenhouse gases in the greenhouse are difficult to collect due to high temperature during the period of closing the greenhouse. The greenhouse comprises a supporting tube, a silica gel hose, an air exhaust pipeline, an air exhaust device and an air storage bag, wherein a plurality of small holes are sequentially formed in the supporting tube, the silica gel hose is arranged in the supporting tube, one end of the silica gel hose extends out of the small holes of the supporting tube and is communicated with the interior of the greenhouse, the other end of the silica gel hose is communicated with the air exhaust pipeline, the air exhaust pipeline is communicated with the air exhaust device arranged outside the greenhouse, an air outlet of the air exhaust device is connected with the air storage bag, the air exhaust device provides power, and air in the greenhouse is exhausted out of the greenhouse through the silica gel hose and the air exhaust pipeline. The device has lower manufacturing cost, simple structure and convenient disassembly and assembly, is convenient for outdoor use by the self-contained storage battery, and realizes the function of automatically collecting greenhouse gases in the greenhouse during the high-temperature closed greenhouse in summer of the facility vegetable greenhouse.

Inventors

• QUAN ZHI
• WEI FULONG
• ZHU YI
• LI XUE

Assignees

• 潍坊现代农业与生态环境研究院
• 中国科学院沈阳应用生态研究所

Dates

Publication Date

20260508

Application Date

20241230

Claims (4)

1. 1. The greenhouse gas collection device is characterized by comprising a support tube (1), a silica gel hose (2), an air exhaust pipeline (3), an air exhaust device (4) and a gas storage bag, wherein a plurality of small holes are sequentially formed in the support tube (1), the silica gel hose (2) is arranged in the support tube (1), one end of the silica gel hose is extended out of the small holes of the support tube (1) to be communicated with the greenhouse internal environment, the other end of the silica gel hose is communicated with the air exhaust pipeline (3), the air exhaust pipeline (3) is communicated with the air exhaust device (4) arranged outside the greenhouse, an air outlet of the air exhaust device (4) is connected with the gas storage bag, and the air exhaust device (4) provides power to exhaust gas in the greenhouse through the silica gel hose (2) and the air exhaust pipeline (3) and store the gas in the gas storage bag.
2. 2. The device for collecting greenhouse gases in a greenhouse according to claim 1, wherein the air extraction device (4) comprises an air inlet (9), an air transmission pipeline (10) and an air outlet (11), the air extraction pipeline (3) is communicated with the air inlet (9) of the air extraction device (4), the air inlet (9) is communicated with the air transmission pipeline (10), the air transmission pipeline (10) is connected with a vacuum pump (6) to suck out the gases in the greenhouse through the vacuum pump (6), the air transmission pipeline (10) is provided with a plurality of branches, the outlet end of each branch is connected with the air outlet (11), the air outlet (11) is connected with a gas storage bag, and the sucked gases are conveyed into the gas storage bag.
3. 3. The device for collecting greenhouse gases in a greenhouse according to claim 2, wherein each branch of the gas pipeline (10) is provided with a time relay (7) and an electromagnetic valve (8), the time relay (7) is a DS-24C time relay, the electromagnetic valve (8) is a 2W direct-acting electromagnetic valve, the time relay (7) controls the opening and closing of the electromagnetic valve (8) and the starting and stopping of the vacuum pump (6) through an electric signal, and the electromagnetic valve (8) is connected with the gas pipeline (10) and distributes gases into different gas storage bags through the gas outlet (11).
4. 4. A device for collecting greenhouse gases in a greenhouse according to claim 3, further comprising a storage battery (5), wherein the storage battery (5) is electrically connected with the air extractor (4), the time relay (7) and the electromagnetic valve (8) to supply power to the air extractor (4), the time relay (7) and the electromagnetic valve (8).

Description

Device for collecting greenhouse gas in greenhouse Technical Field The utility model relates to the technical field of gas collection, in particular to a device for collecting greenhouse gases in a greenhouse. Background The whole growth cycle of greenhouse vegetables is usually from the last ten days of 9 months to the last ten days of 6 months of the next year. In 7 months to 8 months, farmers can seal the greenhouse for high-temperature treatment (commonly called as 'closed greenhouse'). Before the canopy is closed, organic fertilizer is applied into the canopy by farmers, rotary tillage, watering and film covering are carried out, and the aim of sterilization is achieved by utilizing the high temperature in the canopy during the canopy closing period. During the whole canopy-sealing treatment, the applied organic fertilizer is continuously fermented in soil and is accompanied with the generation and discharge of a large amount of greenhouse gases in the process, so that the exploration of the discharge flux and law of the greenhouse gases in the greenhouse of the facility greenhouse in the canopy-sealing period is of great significance for taking measures to reduce the discharge of the greenhouse gases. During the period of closing the greenhouse, no crops are planted in the greenhouse. Therefore, according to the principle of the traditional static box method, the overflow discharge flux of the greenhouse in ventilation can be estimated by adopting the change rate of the greenhouse gas concentration in the greenhouse under the airtight condition. The method is generally only required to collect gas samples in the greenhouse along a time gradient after the greenhouse is closed, and the change of the concentration is measured. However, during the period of summer canopy sealing, the temperature in the greenhouse is higher and can reach 80 ℃ at the highest, and manual sampling in the greenhouse is difficult to realize because (1) the high-temperature environment is harmful to human bodies, human bodies directly enter the greenhouse and face life hazards, and (2) the service life of the greenhouse plastic film is easily reduced due to the fact that the temperature in the greenhouse is too high, farmers usually leave proper gaps for heat dissipation through ventilation openings, and at the moment, the greenhouse is not in a completely sealed state and is not a static box, and the traditional method does not have detection conditions. (3) The strong stimulation gas (such as ammonia gas, hydrogen sulfide and the like) generated by organic fertilizer fermentation during the canopy sealing is harmful to human bodies, and has high risk even if the gas is sampled outside the greenhouse in the daytime, and (4) the conventional gas continuous detection instrument needs to be powered on and is high in price, and the gas continuous detection instrument cannot continuously run when being placed in the greenhouse at too high temperature. Therefore, a device for automatically collecting greenhouse gases in a greenhouse during high-temperature closed greenhouse in summer of a greenhouse vegetable greenhouse is needed, and meanwhile, the device has the characteristics of low manufacturing cost and portability, is convenient for outdoor use by a self-contained storage battery, can collect gas samples with different time gradients, and is beneficial to the fact that related personnel collect samples to be brought back to a laboratory for testing and analysis. By combining the four points, the related operation is more reasonable choice outside the shed. However, the outdoor temperature in summer is also higher, and the greenhouse air port is usually in an open state, so that the optimal time period for sampling can be selected at night, namely, after the internal temperature of the greenhouse is reduced to a proper temperature, the greenhouse air port is closed to form a closed space, and sampling is started. In addition, the automatic monitoring equipment is placed outside the greenhouse, and real-time monitoring is theoretically an option through a probe extending into the greenhouse, but the equipment is usually high in cost and not resistant to high temperature, is difficult to manage outdoors, and easily causes property loss. The sampling process for exploring greenhouse gas emission usually needs to be up to several hours, and manual sampling is time-consuming and labor-consuming, especially in the case that a plurality of greenhouses need to be collected at night. Therefore, a set of automatic sampling device for greenhouse air in summer closed period, which is suitable for operation outside the greenhouse, is needed to be low in cost, simple in structure and convenient to assemble and disassemble, and can realize multi-time gradient automatic sampling and storage after the greenhouse meets sampling conditions, so that the problems are solved. Disclosure of utility model The utility model aims to provide a device for