A portable online detection device for particulate matter in an environment

Abstract

The present invention discloses an online detection device for particulate matter in a portable environment, comprising a portable detection box, a detection mechanism arranged in the detection box and a sampling tube connected to the detection mechanism, the detection mechanism comprising an upper airway component connected to the sampling tube and a lower airway component connected to the upper airway component, an air filter belt is arranged at the mouth of the lower airway component, an active airway component is arranged on the upper part of the air filter belt, the active airway component moves upward to make room for the upper part of the lower airway component so that the air filter belt enters, a detection unit transmitter and a detection unit receiver are fixed in the upper airway component and the lower airway component respectively; the online detection device of the present invention utilizes a portable detection box to fix the detection mechanism, is easy to carry and has a wide range of applications; utilizes the lever principle to realize the up and down movement of the active airway component, has a simple structure, and the detection modules arranged in the upper airway recess and the lower airway are fixed, which reduces the overall failure rate of the equipment and improves the accuracy of detection.

Description

Technical Field

[0001] The invention belongs to the field of detection devices, and more specifically relates to a portable online detection device for particulate matter in an environment. Background Art

[0002] In recent years, with the continuous advancement of urbanization and industrialization, atmospheric particulate matter has become the primary pollutant affecting the air quality of my country's urban environment, especially during the dusty weather in spring, the straw burning period in autumn and the heating period in winter. Particulate matter mainly refers to inhalable particulate matter (PM10, i.e., particulate matter with an aerodynamic equivalent diameter of less than or equal to 10μm) and fine particulate matter (PM2.5, i.e., particulate matter with an aerodynamic equivalent diameter of less than or equal to 2.5μm), which is divided into primary particulate matter and secondary particulate matter.

[0003] In the prior art, the detection principle of the detection equipment for detecting particulate matter in the air is mainly to pass the air through a paper tape with a certain filtering effect, the gas passes through the paper tape, and the particulate matter in the gas is intercepted by the paper tape and stays on the paper tape, thereby realizing the detection of the particulate matter content in the air of a certain volume and flow rate to realize the detection of air quality.

[0004] The detection equipment in the prior art has a complex structure with many control processes and control components during detection. On the other hand, the signal generating probe or signal receiving probe of the detection module moves during detection, which affects the accuracy of detection. Summary of the invention

[0005] The object of the present invention is to provide a portable online particle detection device in an environment, which has a simple structure and a fixed detection module, which reduces the overall failure rate of the device on the one hand and improves the detection accuracy on the other hand.

[0006] The technical solution of the present invention is a portable online detection device for particulate matter in an environment, comprising a detection box, a detection mechanism arranged in the detection box, and a sampling tube detachably connected to the detection mechanism, the detection mechanism comprising an upper airway component connected to the sampling tube and a lower airway component connected to the upper airway component, an air filter belt is arranged at the mouth of the lower airway component, an active airway component is arranged on the upper part of the air filter belt, the active airway component moves upward to make room for the upper part of the lower airway component to allow the air filter belt to enter, and a detection unit transmitter and a detection unit receiver are fixed in the upper airway component and the lower airway component, respectively.

[0007] Preferably, the upper airway assembly comprises an upper fixing block fixedly mounted on the detection box and an upper airway arranged in the upper fixing block, and the upper opening of the upper airway is communicated with the bottom end of the sampling tube.

[0008] Preferably, the lower airway assembly comprises a lower fixing block fixedly mounted on the detection box and a lower airway arranged in the lower fixing block, and an air filter belt is arranged at the upper opening of the lower airway and is connected to the movable airway assembly.

[0009] Preferably, the movable airway assembly includes a movable block placed between an upper fixed block and a lower fixed block, the movable block being provided with an movable airway whose two ends are respectively connected with the upper airway and the lower airway; the movable block is connected with a lifting mechanism, the lifting mechanism lifts the movable block upwards so that the movable block leaves the lower fixed block and the filter belt enters the opening of the lower airway; during detection, the movable block falls freely under the action of its own weight to press the filter belt, thereby realizing the connection between the upper airway, the movable airway and the lower airway.

[0010] Preferably, the lifting mechanism includes lifting rods rotatably connected to both sides of the movable block, a rotating shaft passes through the middle section of the lifting rod, and a pressure rod mechanism is provided at the upper part of the lifting rod away from the movable block end, and the pressure rod mechanism applies downward pressure on the lifting rod to realize the upward movement of the movable block.

[0011] Preferably, the pressure rod mechanism includes a servo motor and a pressure rod shaft driven by the servo motor, two eccentric wheels pass through the pressure rod shaft, the two eccentric wheels are respectively placed on the two lifting rods, and the shortest radius of the eccentric wheel is smaller than the distance between the axis of the pressure rod shaft and the lifting rod, so that the movable block is not affected by external force when moving downward.

[0012] Preferably, shoulders are provided in both the upper airway and the lower airway, fixed brackets are provided on the two shoulders respectively, and the detection unit transmitter and the detection unit receiver are fixed on the fixed brackets respectively.

[0013] Preferably, a sealing tube is connected between the active airway and the upper airway, and the two ends of the sealing tube are respectively placed in the upper airway and the active airway and fixed, and an expansion connection part is provided in the middle of the sealing tube. The expansion connection part protrudes outward and forms an arc-shaped area protruding outward on the outer wall and the inner wall of the sealing tube, and the sealing tube at the lower part of the arc-shaped area is folded upward under the drive of the movable block.

[0014] Preferably, the detection box comprises a box body provided with a side box door, a vertical middle plate parallel to the side box door is provided in the box body, the detection mechanism is fixed on the vertical middle plate, an inspection box door is provided on the side of the box body opposite to the side box door, and the inspection box door is provided opposite to the back of the vertical middle plate;

[0015] A sampling tube hole and a handle are provided on the top surface of the box, and the sampling tube extends out of the sampling tube hole; a supporting foot is provided at the bottom of the box, and an exhaust pipe hole is provided on the bottom surface of the box, an exhaust pipe passes through the exhaust pipe hole, and the top end of the exhaust pipe is connected to the lower airway.

[0016] The beneficial effects of a portable online detection device for particulate matter in an environment according to the technical solution of the present invention are:

[0017] 1. The detection unit transmitter and the detection unit receiver are fixed in the upper airway assembly and the lower airway assembly respectively, that is, in the whole process of detection work, the relative position between the detection unit transmitter and the detection unit receiver and their respective positions are fixed, which changes the problem of complex equipment structure and large detection accuracy error caused by the movement of the detection probe in the prior art.

[0018] 2. The lifting mechanism is used to realize the up and down movement of the movable airway assembly, which is convenient for the movement of the air filter belt, has a simple structure and low cost.

[0019] 3. The detection box adopts a portable box, which is convenient for carrying online detection equipment and is convenient for outdoor operations or mobile detection operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a portable online detection device for particulate matter in an environment according to the technical solution of the present invention.

[0021] Figure 2 for Figure 1 The main view,

[0022] Figure 3 for Figure 1 The left view of

[0023] Figure 4 The schematic diagram of the lifting mechanism structure is shown in Figure 2.

[0024] Figure 5 Schematic diagram of the airway structure.

[0025] Figure 6 Schematic diagram of the sealing tube structure in the detection airway. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0027] like Figure 1 and Figure 5As shown, the technical solution of the present invention is a portable online detection device for particulate matter in an environment, comprising a portable detection box 2, a detection mechanism arranged in the detection box 2, and a sampling tube 1 detachably connected to the detection mechanism, and the detection mechanism inhales the air to be detected through the sampling tube. The detection mechanism comprises an upper airway component 3 connected to the sampling tube 1 and a lower airway component 4 connected to the upper airway component 3, and a filter belt 10 is arranged at the mouth of the lower airway component 4. The gas to be detected enters the lower airway component 4 from the sampling tube 1 and the upper airway component 3, and the gas passes through the filter belt 10, leaving the particulate matter on the filter belt 10, so as to detect the particulate matter remaining on the filter belt, and to detect the quality of the detected gas. An active airway component 5 is arranged on the upper part of the filter belt 10, and the active airway component 5 moves upward to make room for the upper part of the lower airway component 4, so that the filter belt 10 enters, and a detection unit transmitter 12 and a detection unit receiver 14 are respectively fixed in the upper airway component 3 and the lower airway component 4. The detection unit transmitter 12 and the detection unit receiver 14 are fixed in the upper airway component 3 and the lower airway component 4 respectively. During the whole process of the detection mechanism performing the detection work, the detection unit transmitter 12 and the detection unit receiver 14 do not move or exercise, and the relative position between the detection unit transmitter 12 and the detection unit receiver 14 does not move either, which effectively avoids the problem of large detection errors caused by the movement of the detection unit transmitter 12 and the detection unit receiver 14. At the same time, the detection unit transmitter 12 and the detection unit receiver 14 do not move or exercise, which avoids the design of the structure such as the positioning of the detection unit transmitter 12 and the detection unit receiver 14 after the movement, simplifies the structure, reduces the equipment cost, and also reduces the failure rate of the equipment.

[0028] like Figure 4 As shown, the upper airway assembly 3 includes an upper fixed block 31 fixedly mounted on the detection box 1 and an upper airway 32 arranged in the upper fixed block 31, and the upper opening of the upper airway 32 is connected to the bottom end of the sampling tube 1. During the detection work, the upper airway assembly 3 as a whole has no movement of structural components. The upper airway assembly 3 in the technical solution has a simple structure, and only an upper airway 32 is arranged therein, which changes the structure of the upper fixed block in the prior art with multiple components such as a rotating shaft passing through it, simplifies the equipment structure, reduces costs, and reduces the equipment failure rate.

[0029] like Figure 4As shown, the lower airway assembly 4 includes a lower fixed block 41 fixedly mounted on the detection box 1 and a lower airway 42 arranged in the lower fixed block 41. The upper opening of the lower airway 42 is provided with a filter belt 10 and is connected to the movable airway assembly 5. The bottom of the lower airway 42 is connected to an air pump 30, and the air pump 30 is connected to an exhaust pipe extending out of the detection box 2. The air pump 30 provides power for the movement of the detection gas, so that the detection gas is drawn in from the sampling tube 1 and passes through the upper airway 32, the movable airway 52 and the lower airway 42 in sequence. The gas passes through the filter belt 10, and the particles in the detection gas are intercepted on the filter belt 10. Finally, the detection gas is discharged from the detection box through the exhaust pipe of the air pump.

[0030] like Figure 4 As shown, the movable airway assembly 5 includes a movable block 51 placed between the upper fixed block 31 and the lower fixed block 41. The movable block 51 is provided with an movable airway 52 whose two ends are respectively connected to the upper airway 32 and the lower airway 42. The movable airway 52 is a medium connecting the upper airway and the lower airway. The movable block 51 is connected to a lifting mechanism 9, and the lifting mechanism 9 lifts the movable block 51 upward, so that the movable block 51 leaves the lower fixed block 41, and the filter belt 10 enters the mouth of the lower airway 42. During detection, the movable block 51 falls freely under the action of its own weight to press the filter belt 10, thereby realizing the connection between the upper airway 32, the movable airway 52 and the lower airway 42. As shown Figure 2 As shown, the two ends of the air filter belt 10 are respectively a clean belt reel 6 and a take-up reel 8, and the take-up reel 8 is connected to a driving assembly to drive the take-up reel 8 to rotate, so as to pull the air filter belt and move the clean air filter belt to the detection position. In order to ensure that the air filter belt is not scratched during movement, a tensioning wheel 7 is specially provided, and the tensioning wheel 7 is arranged at both ends of the upper opening of the lower air duct 42, and the highest point of the outer circumference of the tensioning wheel is adapted to the position of the upper opening of the lower air duct.

[0031] like Figure 4As shown, the lifting mechanism 9 includes a lifting rod 92 which is rotatably connected to both sides of the movable block 51 through a pin shaft 91, a rotating shaft 93 passes through the middle section of the lifting rod 92, and the rotating shaft 93 is fixedly installed with the detection box. The lifting rod 92 is lifted and rotated with the rotating shaft 93 as a fulcrum. A pressure rod mechanism is provided at the upper part of the end of the lifting rod 92 away from the movable block 51. The pressure rod mechanism applies downward pressure to the lifting rod 92 to lift and move the movable block 51 upward, that is, the movable block 51 leaves the upper end surface of the lower fixed block 41, which is convenient for the movement of the air filter belt. The pressure rod mechanism includes a servo motor 96 and a pressure rod shaft 94 driven by the servo motor 96. Two eccentric wheels 95 pass through the pressure rod shaft 94. The two eccentric wheels 95 are respectively placed on two lifting rods 92. The shortest radius of the eccentric wheel 95 is smaller than the distance between the axis of the pressure rod shaft 94 and the lifting rod 92, so that the movable block 51 is not affected by external force when it moves downward, that is, after the pressure rod mechanism is removed, the movable block 51 falls under its own gravity, and the filter belt 10 is compressed, and the active airway and the lower airway are connected. The movable block 51 is unloaded by its own weight, which avoids excessive pressure on the filter belt 10, which may cause deformation of the filter belt.

[0032] A waist hole is provided at the connection between the lifting rod 92 and the movable block 51, the length of the waist hole is greater than the diameter of the pin shaft 91, and the waist hole diameter is adapted to the pin shaft 91. When the lifting rod 92 is lifted, the movable block 51 rises with the waist hole, and the movable block 51 has a certain movement in the waist hole, slides in the waist hole, and keeps rising horizontally. The distance between the pressure rod shaft 94 and the rotating shaft 93 is greater than the distance between the rotating shaft 93 and the pin shaft 91, and according to the lever principle, it has a labor-saving effect.

[0033] like Figure 5 The upper airway 32 and the lower airway 42 are both provided with shoulders 33 / 43, and the two shoulders 33 / 43 are respectively provided with fixed brackets 11 / 13, and the detection unit transmitter 12 and the detection unit receiver 14 are respectively fixed to the fixed brackets 11 / 13. The detection unit transmitter 12 and the detection unit receiver 14 are fixed to the fixed brackets to prevent the vibration of the online detection device during transportation and handling, which may affect the position of the detection unit transmitter 12 and the detection unit receiver 14, and to prevent the detection unit transmitter 12 and the detection unit receiver 14 from deviation during detection.

[0034] like Figure 6 A sealing tube 15 is connected between the active airway 52 and the upper airway 32. The two ends of the sealing tube 15 are respectively placed in the upper airway 32 and the active airway 52 and fixed. An expansion connection part 151 is provided in the middle of the sealing tube 15. The expansion connection part 151 protrudes outward and forms an arc-shaped area protruding outward on the outer wall and the inner wall of the sealing tube 15. The sealing tube 15 at the lower part of the arc-shaped area is folded upward under the drive of the active block 51. The design of the sealing tube 15 structure realizes the connection and sealing of the upper airway and the active airway on the one hand, and does not affect the upward movement of the active block 51 on the other hand.

[0035] like Figure 1 The detection box 2 includes a box body 21 provided with a side box door 22, a vertical middle plate 25 parallel to the side box door 22 is provided in the box body 21, the detection mechanism is fixed on the vertical middle plate 25, and an inspection box door is provided on the side of the box body 21 opposite to the side box door 22, and the inspection box door is provided opposite to the back of the vertical middle plate 25. A sampling tube hole 24 and a handle 23 are provided on the top surface of the box body 21. The sampling tube 1 extends out from the sampling tube hole 24; a supporting foot 26 is provided at the bottom of the box body 21, and an exhaust pipe hole 27 is provided on the bottom surface of the box body 21, an exhaust pipe passes through the exhaust pipe hole 27, and the top end of the exhaust pipe is connected with the air pump 30 and the lower airway.

[0036] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A portable online detection device for particulate matter in an environment, characterized in that: It comprises a detection box, a detection mechanism arranged in the detection box, and a sampling tube detachably connected to the detection mechanism, the detection mechanism comprises an upper airway component connected to the sampling tube and a lower airway component connected to the upper airway component, the lower airway component is provided with an air filter belt at the mouth, the upper part of the air filter belt is provided with a movable airway component, the movable airway component moves upward to make room for the upper part of the lower airway component so that the air filter belt enters, and a detection unit transmitter and a detection unit receiver are fixed in the upper airway component and the lower airway component respectively; The upper airway assembly includes an upper fixed block fixedly mounted on the detection box and an upper airway arranged in the upper fixed block, and the upper opening of the upper airway is connected to the bottom end of the sampling tube; the lower airway assembly includes a lower fixed block fixedly mounted on the detection box and a lower airway arranged in the lower fixed block, and the upper opening of the lower airway is provided with an air filter belt and is connected to the movable airway assembly; The movable airway assembly includes a movable block placed between an upper fixed block and a lower fixed block, the movable block is provided with an movable airway having two ends respectively connected with the upper airway and the lower airway; the movable block is connected with a lifting mechanism, the lifting mechanism lifts the movable block upward, so that the movable block leaves the lower fixed block, so that the filter belt enters the lower airway opening; during detection, the movable block freely falls under the action of its own weight to press the filter belt, so as to realize the connection between the upper airway, the movable airway and the lower airway; The lifting mechanism comprises lifting rods which are rotatably connected to both sides of the movable block, a rotating shaft passes through the middle section of the lifting rod, and a pressure rod mechanism is arranged on the upper part of the lifting rod away from the movable block end, and the pressure rod mechanism applies downward pressure to the lifting rod to realize the upward movement of the movable block; the pressure rod mechanism comprises a servo motor and a pressure rod shaft driven by the servo motor, two eccentric wheels pass through the pressure rod shaft, and the two eccentric wheels are respectively placed on the two lifting rods, and the shortest radius of the eccentric wheel is smaller than the distance between the axis of the pressure rod shaft and the lifting rod, so that the movable block is not affected by external force when it moves downward; A sealing tube is connected between the active airway and the upper airway, and the two ends of the sealing tube are respectively placed in the upper airway and the active airway and fixed. An expansion connection part is provided in the middle of the sealing tube, and the expansion connection part protrudes outward and forms an arc-shaped area protruding outward on the outer wall and the inner wall of the sealing tube. The sealing tube at the lower part of the arc-shaped area is folded upward under the drive of the active block.

2. The portable online detection device for particulate matter in an environment according to claim 1, characterized in that: The upper airway and the lower airway are both provided with shoulders, and the two shoulders are respectively provided with fixed brackets, and the detection unit transmitter and the detection unit receiver are respectively fixed on the fixed brackets.

3. The portable online particle detection device in an environment according to claim 1, characterized in that: The detection box includes a box body provided with a side box door, a vertical middle plate parallel to the side box door is provided in the box body, the detection mechanism is fixed on the vertical middle plate, an inspection box door is provided on the side of the box body opposite to the side box door, and the inspection box door is provided opposite to the back of the vertical middle plate; A sampling tube hole and a handle are provided on the top surface of the box, and the sampling tube extends out of the sampling tube hole; a supporting foot is provided at the bottom of the box, and an exhaust pipe hole is provided on the bottom surface of the box, an exhaust pipe passes through the exhaust pipe hole, and the top end of the exhaust pipe is connected to the lower airway.

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