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CN-121978050-A - High-accuracy air pollution detection device

CN121978050ACN 121978050 ACN121978050 ACN 121978050ACN-121978050-A

Abstract

The invention discloses a high-accuracy air pollution detection device, which relates to the technical field of air pollution detection and comprises a detection host, wherein a storage battery is arranged in the detection host, a charging port for charging the storage battery is arranged on the lower end face of the detection host, and an air inlet component capable of realizing dust filtration is arranged on the upper end face of the detection host. According to the high-accuracy air pollution detection device, the gas compression function is integrated in the detection flow, namely, the detection cylinder with smaller volume is designed, and the gas in the large-volume sampling cylinder is pushed into the detection cylinder by utilizing the first piston head, so that the gas is compressed and pressurized in the detection cylinder, the increase of the gas pressure means the increase of the number density of gas molecules to be detected in a unit optical path, the absorption signal of the gas to an infrared characteristic spectrum is enhanced, the detection capability of low-concentration pollutants and the signal-to-noise ratio of the detection signal are greatly improved, and the high-accuracy detection is realized, so that the high-accuracy air pollution detection device is particularly suitable for monitoring trace pollutants with environmental background level.

Inventors

  • WU JIANMEI
  • ZHU YIMING

Assignees

  • 江苏江天工程检测有限公司

Dates

Publication Date
20260505
Application Date
20260206

Claims (10)

  1. 1. The high-accuracy air pollution detection device comprises a detection main machine (1), wherein a storage battery (2) is arranged in the detection main machine (1), a charging port (3) for charging the storage battery (2) is arranged on the lower end surface of the detection main machine (1), and the high-accuracy air pollution detection device is characterized in that an air inlet component (4) capable of realizing dust filtration is arranged on the upper end surface of the detection main machine (1), an exhaust pipe (5) is further fixed on the detection main machine (1), and a partition board (6) is fixed in the detection main machine (1); The sampling assembly (7) realizes continuous sampling action and air compression action of air through alternate movement, and the sampling assembly (7) is arranged in the detection host machine (1); the detection assembly (8) is used for realizing accurate detection effect on compressed gas and realizing automatic removal effect on the detected gas, and the detection assembly (8) is arranged on the partition board (6).
  2. 2. The high-accuracy air pollution detection device according to claim 1, wherein the air inlet assembly (4) comprises an air inlet pipe (401) fixed on the upper end face of the detection host machine (1), the air inlet pipe (401) is in threaded connection with the sampling head (402), an air inlet (403) is formed in the outer surface of the sampling head (402) at equal angles, and a filter screen (404) fixed in the sampling head (402) is arranged on the inner side of the air inlet (403).
  3. 3. A high accuracy air pollution detection device according to claim 2, wherein the sampling assembly (7) comprises a motor (701) fixed in the detection main machine (1), a driving gear (702) is fixed at the output end of the motor (701), the driving gear (702) is meshed with a driven gear (703) to realize transmission, and the gear ratio of the driving gear (702) to the driven gear (703) is 1:2.
  4. 4. The high-accuracy air pollution detection device according to claim 3, wherein the driven gear (703) is fixed with a limiting ring (704), the driven gear (703), the limiting ring (704) and the positioning block (705) are in sliding connection, the positioning block (705) is arranged in three, and meanwhile, the positioning block (705) is mutually fixed with the detection host machine (1) and the partition board (6) through a supporting rod (706).
  5. 5. The high-accuracy air pollution detection device according to claim 4, wherein the driven gear (703) is fixed with two protruding shafts (707), the two protruding shafts (707) are distributed on the front end face and the rear end face of the driven gear (703) in a vertical mode, the protruding shafts (707) are in sliding connection with the sliding groove rods (708), the sliding groove rods (708) are mutually fixed with the square rods (709), the square rods (709) are fixedly provided with first piston heads (710), the square rods (709) and the sampling cylinders (711) are in sliding connection, and the sampling cylinders (711) are fixedly arranged on the partition plate (6).
  6. 6. The high-accuracy air pollution detection device as set forth in claim 5, wherein the sampling tube (711) is fixed with a first one-way air inlet valve (712), the first one-way air inlet valve (712) is connected with the air inlet pipe (401) through a conduit, and the sampling tube (711) is also fixed with a first one-way air outlet valve (713).
  7. 7. The high-accuracy air pollution detection device as set forth in claim 6, wherein the detection assembly (8) comprises a detection cylinder (801) symmetrically fixed on the partition board (6), the inner volume of the detection cylinder (801) is smaller than that of the sampling cylinder (711), the inner diameter of the detection cylinder (801) is equal to that of the sampling cylinder (711), a second one-way air inlet valve (802) is fixed on the detection cylinder (801), the second one-way air inlet valve (802) is connected with the first one-way air outlet valve (713) through a guide pipe, a second one-way air outlet valve (803) is further fixed on the detection cylinder (801), and the second one-way air outlet valve (803) is connected with the exhaust pipe (5) through the guide pipe.
  8. 8. The high-accuracy air pollution detection device according to claim 7, wherein an infrared light source (804) is nested at the upper end of the inner side of the detection cylinder (801), a second piston (805) is slidably arranged in the detection cylinder (801), an infrared detector (806) is nested in the second piston (805), a round rod (807) which is slidably connected with the detection cylinder (801) is fixed at the lower end of the second piston (805), and a spring (808) is fixed between the round rod (807) and the detection cylinder (801).
  9. 9. A high accuracy air pollution detection device as recited in claim 8, wherein the round bar (807) is fixed with a push bar (809), and the push bar (809) is located right above the chute bar (708).
  10. 10. The high-accuracy air pollution detection device according to claim 9, wherein the round rod (807) is fixed with one end of the connecting rod (810), the connecting rod (810) is in sliding connection with the detection cylinder (801), the other end of the connecting rod (810) is fixed with the movable plate (811), the movable plate (811) is provided with the guide groove (812), the guide groove (812) is in sliding connection with the sliding rod (813), the sliding rod (813) is fixed with the cross rod (814), the cross rod (814) is in sliding connection with the detection cylinder (801), the cross rod (814) is connected with the sealing plate (815), the sealing plate (815) is in sliding connection with the detection cylinder (801), and the through hole between the sealing plate (815) and the detection cylinder (801) and the second one-way air outlet valve (803) is matched to realize sealing effect.

Description

High-accuracy air pollution detection device Technical Field The invention relates to the technical field of air pollution detection, in particular to a high-accuracy air pollution detection device. Background The air pollution detection is an important component of environmental monitoring, is particularly important for accurately monitoring gaseous pollutants such as nitric oxide, nitrogen dioxide, sulfur dioxide and the like in the atmosphere, and the existing air pollution detection device generally adopts a mode of combining direct sampling with sensor detection, but has some inherent defects; 1. The conventional sampling mode is mostly intermittent, namely sampling, detection and exhaust processes are carried out in a time-sharing manner, real continuous monitoring cannot be realized, a data blank period exists between two sampling processes, and instantaneous change of the concentration of pollutants is difficult to capture; 2. For low-concentration pollutants, the direct sampling mode is that the number of target gas molecules in unit volume is limited, the sensor signal is weak, so that the detection sensitivity is insufficient, the signal to noise ratio is low, accurate measurement is difficult to realize, and the accuracy of detection data is affected. Disclosure of Invention The invention aims to provide an air pollution detection device with high accuracy so as to solve the problems in the background technology. The high-accuracy air pollution detection device comprises a detection main machine, wherein a storage battery is arranged in the detection main machine, a charging port for charging the storage battery is arranged on the lower end face of the detection main machine, an air inlet assembly capable of realizing dust filtration is arranged on the upper end face of the detection main machine, an exhaust pipe is further fixed on the detection main machine, and a partition board is fixed in the detection main machine; The sampling assembly realizes continuous sampling action and air compression action of air through alternate movement, and is arranged in the detection host; The detection component is used for realizing accurate detection effect on compressed gas and can realize automatic removal effect on the detected gas, and the detection component is arranged on the partition plate. Preferably, the subassembly that admits air is including fixing the intake pipe at detecting host computer up end, and is threaded connection between intake pipe and the sampling head to the air inlet has been seted up to sampling head surface equiangle, and the air inlet inboard is provided with the filter screen of fixing in the sampling head simultaneously, through the effect of filter screen, can filter the dust in the air, guarantees sample gas's cleanness, and through threaded connection between intake pipe and the sampling head, can conveniently carry out dismouting change to the sampling head. Preferably, the sampling assembly comprises a motor fixed in the detection host, the output end of the motor is fixed with a driving gear, the driving gear is meshed with a driven gear to realize transmission, and meanwhile, the gear ratio of the driving gear to the driven gear is 1:2. Preferably, the driven gear is fixed with a limiting ring, the driven gear, the limiting ring and the positioning blocks are in sliding connection, the positioning blocks are arranged in three, meanwhile, the positioning blocks are mutually fixed with the detection host and the separation plate through the supporting rods, and when the driven gear rotates, the stability of rotation of the driven gear can be ensured through the sliding guiding effect between the limiting ring and the positioning blocks. Preferably, the driven gear is fixed with two protruding shafts, and the two protruding shafts are distributed up and down on the front end face and the rear end face of the driven gear, and are in sliding connection with the sliding groove rod, meanwhile, the sliding groove rod and the square rod are mutually fixed, the square rod is fixedly provided with the first piston head, the square rod and the sampling tube are in sliding connection, the sampling tube is fixed on the partition plate, and basic acting force can be provided for up-down reciprocating motion of the square rod and the first piston head through sliding action between the protruding shafts and the sliding groove rod, so that normal operation of the device is guaranteed. Preferably, the sampling tube is fixed with a first one-way air inlet valve, and the first one-way air inlet valve is connected with the air inlet pipe through a guide pipe, the sampling tube is also fixed with a first one-way air outlet valve, and air can be ensured to move unidirectionally in the sampling tube through the action of the first one-way air inlet valve and the first one-way air outlet valve, so that the normal operation of the device is ensured. Preferably, the detection assembly compri