Search

CN-121977893-A - Air sampling device and method for environmental monitoring

CN121977893ACN 121977893 ACN121977893 ACN 121977893ACN-121977893-A

Abstract

The invention relates to the technical field of environmental monitoring, in particular to an air sampling device and method for environmental monitoring, comprising a placing table, an elevating platform and a sampling assembly, wherein a winding motor is fixed in the placing table, one end of a lifting rope is connected with the output end of the winding motor, the other end of the lifting rope is connected with a sampling installation table, a helium balloon is connected with the sampling installation table, the sampling assembly comprises an air inlet pipe, a sampling pump, an air flow guide pipe, a sampling container, a sampling shell, a vacuum pump and a connector, the sampling shell is fixed on the sampling installation table, the sampling container is rotatably arranged in the sampling shell, the air flow guide pipe is slidably arranged on the sampling shell and is used for being connected with the sampling container, the sampling pump is communicated with the air flow guide pipe, the air inlet pipe is communicated with the sampling pump, the connector is slidably arranged on the sampling shell and is used for being connected with the sampling container, and the vacuum pump is connected with the connector, so that air with different heights can be collected more conveniently to monitor air quality better.

Inventors

  • DU QIAOLING
  • CHEN YIN
  • LI GUOQING
  • GE YI
  • YUE YU

Assignees

  • 重庆清源环境监测有限公司

Dates

Publication Date
20260505
Application Date
20260403

Claims (8)

  1. 1. An air sampling device for environmental monitoring is characterized in that, The device comprises a placing table, a lifting platform and a sampling assembly, wherein the lifting platform comprises a helium bag, a sampling installation table, a lifting rope, a winding roller and a winding motor, the winding motor is fixed in the placing table, one end of the lifting rope is connected with the output end of the winding motor, the other end of the lifting rope is connected with the sampling installation table, and the helium bag is connected with the sampling installation table; The sampling assembly comprises an air inlet pipe, a sampling pump, a gas flow guide pipe, a sampling container, a sampling shell, a vacuum pump and a connector, wherein the sampling shell is fixed on a sampling mounting table, the sampling container is rotatably arranged in the sampling shell, the gas flow guide pipe is slidably arranged on the sampling shell and used for being connected with the sampling container, the sampling pump is communicated with the gas flow guide pipe, the air inlet pipe is communicated with the sampling pump, the connector is slidably arranged on the sampling shell and used for being connected with the sampling container, the vacuum pump is connected with the connector, the sampling container comprises a mounting block, a rotating disc, a plurality of sampling cavities and a driving structure, the mounting block is slidably arranged on the sampling shell, the rotating disc is rotatably arranged on the mounting block, the sampling cavities are provided with connecting valves and pressure balance films, the sampling cavities are distributed on the rotating disc, the driving structure comprises a second gear, a second supporting gear ring and a third motor, the second supporting gear is fixedly arranged on the rotating disc, the second gear is rotatably arranged on the sampling shell, and the output end of the second supporting gear ring is connected with the third motor.
  2. 2. An air sampling device for environmental monitoring as defined in claim 1, wherein, The placing table comprises a placing table body, a baffle, a moving wheel and a locking structure, wherein the baffle is rotatably arranged on the placing table body, the moving wheel is rotatably arranged below the placing table body, and the locking structure is arranged on the placing table body.
  3. 3. An air sampling device for environmental monitoring as defined in claim 2, wherein, The locking structure comprises a lock rod, a supporting spring and a triangular block, wherein the lock rod is arranged on the placing table body in a sliding mode, the supporting spring is used for supporting the lock rod, the triangular block is fixed on the lock rod and located on one side of the baffle, and the baffle contacts with the triangular block to push the lock rod to retract when being closed.
  4. 4. An air sampling device for environmental monitoring according to claim 3, wherein, The helium bag has a micro-compressor pump for adjusting the internal air pressure to compensate for the variation in atmospheric density at different altitudes.
  5. 5. An air sampling device for environmental monitoring as defined in claim 4, wherein, The lift-off platform still includes gesture adjusting unit, gesture adjusting unit includes support ring gear, sliding block, adjusting gear, second motor and adjusting blade, it fixes to support the ring gear one side of sampling mount table, the sliding block slides and sets up on the support ring gear, adjusting gear rotate set up on the sliding block, and with support the ring gear meshing, the output of second motor with adjusting gear connects, adjusting blade sets up on the sliding block.
  6. 6. An air sampling device for environmental monitoring as defined in claim 5, wherein, The air inlet pipe comprises a pipe body and an insect-proof net, and the insect-proof net is arranged at the inlet of the pipe body.
  7. 7. An air sampling device for environmental monitoring as defined in claim 6, wherein, The sampling pump comprises a miniature differential pressure sensor, a high-precision mass flow controller and a variable-frequency air pump, wherein the miniature differential pressure sensor is used for acquiring an air pressure change value, and the high-precision mass flow controller is used for controlling the variable-frequency air pump based on the air pressure change value.
  8. 8. An air sampling method for environmental monitoring, which adopts the air sampling device for environmental monitoring according to any one of claims 1 to 7, and is characterized by comprising the following steps: the winding motor is controlled to loosen the lifting rope, and the helium gas bag drives the sampling assembly to move to a specified height; Starting a vacuum pump to pump the sampling container to a preset vacuum degree; And starting the sampling pump to enable air with a corresponding height to enter the sampling container through the air inlet pipe for storage.

Description

Air sampling device and method for environmental monitoring Technical Field The invention relates to the technical field of environmental monitoring, in particular to an air sampling device and method for environmental monitoring. Background Air sampling in environmental monitoring refers to collecting samples of gas or particulate matters in the atmosphere at specific time and place by special equipment, and is used for analyzing the types and the concentrations of pollutants in the air. The process is an important basis for evaluating air quality, identifying pollution sources, making environmental protection policies and guaranteeing public health. Most of the existing air sampling devices are deployed on the ground or in low altitude, usually in the range of 1.5 meters to 10 meters from the ground, and are mainly used for collecting air samples near the ground layer. The arrangement mode is convenient to operate and maintain, but has obvious limitations that on one hand, low-altitude sampling is difficult to reflect pollutant distribution characteristics in the vertical direction of the atmosphere, particularly cannot capture the diffusion and accumulation conditions of pollutants under meteorological conditions such as high-altitude transmission, boundary layer change or reverse temperature layer and the like, on the other hand, high-rise buildings in urban environments are dense, heat island effect is obvious, air quality at different heights possibly has obvious difference, and misjudgment on the whole pollution condition is easily caused only by relying on low-altitude data. Disclosure of Invention The invention aims to provide an air sampling device and method for environmental monitoring, which aim to collect air with different heights more conveniently so as to monitor air quality better. In order to achieve the above object, in a first aspect, the present invention provides an air sampling device for environmental monitoring, comprising a placing table, a lift-off platform and a sampling assembly, wherein the lift-off platform comprises a helium bag, a sampling installation table, a lifting rope, a wind-up roller and a wind-up motor, the wind-up motor is fixed in the placing table, one end of the lifting rope is connected with an output end of the wind-up motor, the other end of the lifting rope is connected with the sampling installation table, and the helium bag is connected with the sampling installation table; The sampling assembly comprises an air inlet pipe, a sampling pump, a gas flow guide pipe, a sampling container, a sampling shell, a vacuum pump and a connector, wherein the sampling shell is fixed on the sampling mounting table, the sampling container is rotatably arranged in the sampling shell, the gas flow guide pipe is slidably arranged on the sampling shell and used for being connected with the sampling container, the sampling pump is communicated with the gas flow guide pipe, the air inlet pipe is communicated with the sampling pump, and the connector is slidably arranged on the sampling shell and used for being connected with the sampling container, and the vacuum pump is connected with the connector. The placing table comprises a placing table body, a baffle, a moving wheel and a locking structure, wherein the baffle is rotatably arranged on the placing table body, the moving wheel is rotatably arranged below the placing table body, and the locking structure is arranged on the placing table body. The locking structure comprises a lock rod, a supporting spring and a triangular block, wherein the lock rod is arranged on the placing table body in a sliding mode, the supporting spring is used for supporting the lock rod, the triangular block is fixed on the lock rod and located on one side of the baffle, and the baffle contacts with the triangular block to push the lock rod to retract when being closed. Wherein the helium bag has a micro-compressor pump for adjusting the internal air pressure to compensate for the variation in the atmospheric density at different altitudes. The lifting platform further comprises a posture adjusting unit, the posture adjusting unit comprises a supporting gear ring, a sliding block, an adjusting gear, a second motor and an adjusting blade, the supporting gear ring is fixed on one side of the sampling installation table, the sliding block is arranged on the supporting gear ring in a sliding mode, the adjusting gear is arranged on the sliding block in a rotating mode and meshed with the supporting gear ring, the output end of the second motor is connected with the adjusting gear, and the adjusting blade is arranged on the sliding block. The air inlet pipe comprises a pipe body and an insect-proof net, and the insect-proof net is arranged at the inlet of the pipe body. The sampling pump comprises a miniature differential pressure sensor, a high-precision mass flow controller and a variable-frequency air pump, wherein the miniature differential pressure