A constant temperature and constant flow atmospheric sampling device

Abstract

The present invention relates to the field of sampling technology, and in particular to a constant temperature and constant flow atmospheric sampling device, comprising a main frame, an airflow detection and control component is provided on the upper side of the main frame, the airflow detection and control component is used to detect the airflow velocity and airflow temperature, the airflow detection and control component is used to control the airflow temperature, a bearing plate is slidably provided on the upper side of the bottom of the main frame, a plurality of storage components are provided on the upper side of the bearing plate, the storage components are used to store and store air, an air extraction component is provided on the inner side of the main frame, the air extraction component is used to draw air into the storage component, a pushing component is provided between the air extraction component and the bearing plate, and the pushing component is used to drive the bearing plate to translate. The present invention has the functions of flow velocity detection, temperature detection, temperature control, automatic continuous sampling, and drive coordination by arranging the main frame, the airflow detection and control component, the bearing plate, the storage component, the air extraction component, and the pushing component.

Description

Technical Field

[0001] The invention relates to the technical field of sampling, and in particular to a constant-temperature and constant-flow atmospheric sampling device. Background Art

[0002] Atmospheric sampling refers to the method of collecting samples of pollutants or polluted air in the atmosphere. One collection method is to allow a large amount of air to pass through liquid absorbents or solid adsorbents to enrich pollutants with lower concentrations in the atmosphere, such as the vacuum method and the membrane filter method. The other method is to use containers (glass bottles, plastic bags, etc.) to collect air containing pollutants. At present, sampling of the atmosphere is required in many cases such as air quality testing, and sampling of the atmosphere requires the use of atmospheric sampling equipment.

[0003] Existing atmospheric sampling equipment usually directly draws air into a container during collection. This collection method cannot ensure that the temperature and flow rate of the air flow are relatively constant when the air is drawn in, which can easily cause uneven concentrations of substances in the air in the container and inaccurate test results. Moreover, after completing one sampling, the container needs to be manually replaced before the next sampling can be carried out, which is not convenient for continuous sampling. For this reason, we propose a constant temperature and constant flow atmospheric sampling device to solve the above problems. Summary of the invention

[0004] The present invention is to solve the problem that the existing atmospheric sampling equipment usually directly sucks air into a container during collection. This collection method cannot ensure that the temperature and flow rate of the air flow are relatively constant when sucking air, which can easily cause uneven concentration of substances in the air in the container and inaccurate detection results. Moreover, after completing one sampling, the container needs to be manually replaced before the next sampling can be carried out, which is not convenient for continuous sampling. A constant temperature and constant flow atmospheric sampling device is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A constant temperature and constant flow atmospheric sampling device is designed, comprising a main frame, an airflow detection and control component is provided on the upper side of the main frame, the airflow detection and control component is used to detect the airflow velocity and airflow temperature, the airflow detection and control component is used to control the airflow temperature, a bearing plate is slidably provided on the upper side of the bottom of the main frame, a plurality of storage components are provided on the upper side of the bearing plate, the storage components are used to store air, an exhaust component is provided on the inner side of the main frame, the exhaust component is used to draw air into the storage component, a pushing component is provided between the exhaust component and the bearing plate, the pushing component is used to drive the bearing plate to translate, and the exhaust component is used to drive the pushing component.

[0007] Preferably, the airflow detection control component includes an upper T-tube, a through hole is provided on the upper side of the main frame, the upper T-tube is fixed on the inner side of the through hole, an outer T-tube is rotatably provided on the outer periphery of the upper T-tube, the outer T-tube is located on the upper side of the main frame, the outer T-tube and the main frame are detachably connected by bolts, a ventilation pipe is fixed on the outer periphery of the outer T-tube, a bracket, a temperature sensor, and a wind speed sensor are fixed on the inner side of the ventilation pipe, a heating wire is fixed on one side of the bracket, a direction changing guide plate is fixed on the outer periphery of the ventilation pipe, and an operation processing component is provided on one side of the main frame.

[0008] Preferably, the operation processing component includes a control panel, a processing controller, and a battery. A mounting hole is provided on one side of the main frame, the control panel is fixed on the inner side of the mounting hole, the processing controller and the battery are fixed on the inner wall of the main frame, and the control panel, battery, temperature sensor, wind speed sensor, and heating wire are electrically connected to the processing controller through a wire or a wire and a conductive slip ring.

[0009] Preferably, the storage assembly includes a vertical frame, which is fixed on the upper side of the supporting plate, a positioning frame is fixedly provided on one side of the vertical frame, a storage barrel is detachably provided on the inner side of the positioning frame, two baffles are fixedly provided on the lower side of the positioning frame, a T-shaped piston is slidably provided on the inner side of the storage barrel, a conical cone is fixedly provided on the lower end of the T-shaped piston, and an air inlet and outlet assembly is provided on the upper side of the storage barrel.

[0010] Preferably, the air inlet and outlet assembly includes a lower T-tube, a circular hole is provided on the upper side of the storage barrel, the lower T-tube is fixed on the inner side of the circular hole, sealing rings are fixed on the lower side of the upper T-tube and the upper side of the lower T-tube, and the two sealing rings can contact and cooperate, a mounting plate is fixed on the inner side of the lower T-tube, and two one-way valves are fixedly connected to the upper side of the mounting plate through a pipeline, and a dust net is fixed on the upper side of one of the one-way valves.

[0011] Preferably, the vacuum assembly includes a hollow shaft, a support seat is rotatably provided on the outer circumference of the hollow shaft, the support seat is fixed to the upper bottom side of the main frame, an electric motor is fixed on one side of the support seat, the electric motor is electrically connected to the processing controller through a wire, the shaft end of the electric motor is connected to the outer circumference of the hollow shaft through a bevel gear transmission, a rocker arm is fixed on the outer circumference of the hollow shaft, a fixed shaft is fixed on one side of the rocker arm, a connecting rod is rotatably provided on the outer circumference of the fixed shaft, a Z-shaped frame is rotatably provided on the upper end of the connecting rod, L-shaped frames are fixed on both sides of the Z-shaped frame away from each other, the L-shaped frame slides on the inner wall of the main frame, and an automatic clamping and disengaging component is provided on the Z-shaped frame.

[0012] Preferably, the automatic engaging and disengaging assembly includes a beveled buckle, a movable hole is provided on the lower side of the Z-shaped frame, the beveled buckle slides on the inner side of the movable hole, a guide rod is fixed on the inner side of the movable hole, the beveled buckle slides on the outer periphery of the guide rod, a engaging spring is fixed between the beveled buckle and the Z-shaped frame, the beveled buckle can be engaged with the conical cone, an unlocking beveled block is fixed on one side of the beveled buckle, a connecting frame is fixed on the inner wall of the main frame, a beveled fixing frame is fixed on one side of the connecting frame, the beveled fixing frame can contact and cooperate with the unlocking beveled block, and an anti-collision groove is provided on one side of the Z-shaped frame.

[0013] Preferably, the pushing assembly includes a reciprocating frame, which slides on the upper bottom side of the main frame, a driving hole is provided on one side of the reciprocating frame, the fixed shaft slides on the inner side of the driving hole, a cross groove is provided on one side of the reciprocating frame, a cross block is slidably provided on the inner side of the cross groove, the cross block and the reciprocating frame are detachably connected by bolts, a handle is fixed on the upper side of the cross block, a top plate is slidably provided on the outer periphery of the handle, the top plate is fixed on one side of the reciprocating frame, a driving shaft is fixed on one side of the cross block, and a one-way driving assembly is provided between the driving shaft and the supporting plate.

[0014] Preferably, the one-way drive assembly includes a rack and a gear, the rack is fixed on the upper side of the supporting plate, a ratchet is fixed on the outer periphery of the driving shaft, the gear can be connected to the rack through meshing, the gear and the rack can contact, fit and separate, two connecting rings are fixed on the inner side of the gear, the connecting ring rotates on the outer periphery of the driving shaft, a plurality of latch teeth are rotatably provided on the inner side of the gear, the latch teeth can contact and fit with the outer periphery of the ratchet, and a driving spring is fixed between one side of the latch teeth and the inner side of the gear.

[0015] The constant temperature and constant flow atmospheric sampling device proposed by the present invention has the following beneficial effects:

[0016] (1) By providing a main frame, an airflow detection control component, and an operation processing component, the present invention has the functions of flow rate detection, temperature detection, and temperature control. It can absorb air when the airflow is relatively constant, and can control the airflow temperature to be relatively constant. It can make the concentration of substances in the air in the container uniform, and can make the detection result more accurate.

[0017] (2) By providing a main frame, a carrying plate, a storage component, an exhaust component, a pushing component and an automatic card connection and release component, the present invention has the function of automatic continuous sampling, can perform multiple samplings continuously, does not need to frequently replace the container, and can realize unmanned timed intermittent sampling, which can meet a variety of usage requirements.

[0018] (3) By providing an air extraction component, a pushing component, and a one-way driving component, the present invention has a driving coordination function. When the rocker arm rotates, automatic clamping, automatic air extraction, automatic unclamping, and automatic pushing can be achieved. Only a single driving component is needed to complete automatic collection and automatic pushing. There is no need for multiple driving components to be used in coordination, which can control production costs, facilitate subsequent maintenance, and has a low failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the front three-dimensional structure of a constant temperature and constant flow atmospheric sampling device proposed by the present invention;

[0020] Figure 2 This is a schematic diagram of the back three-dimensional structure of a constant temperature and constant flow atmospheric sampling device proposed by the present invention;

[0021] Figure 3 This is a front cutaway three-dimensional structural schematic diagram of a constant temperature and constant flow atmospheric sampling device proposed by the present invention;

[0022] Figure 4 The present invention proposes Figure 3 A schematic diagram of the partial enlarged structure of the middle A area;

[0023] Figure 5 A schematic diagram of a side-sectioned three-dimensional structure of a constant temperature and constant flow atmospheric sampling device proposed by the present invention;

[0024] Figure 6 The present invention proposes Figure 5 A schematic diagram of the partial enlarged structure of the middle B area;

[0025] Figure 7 The present invention proposes Figure 5 A schematic diagram of the partial enlarged structure of the middle C area;

[0026] Figure 8 A schematic diagram of a back-sectioned three-dimensional structure of a constant temperature and constant flow atmospheric sampling device proposed by the present invention;

[0027] Fig. 9 The present invention proposes Figure 8 A schematic diagram of the partial enlarged structure of the middle D area;

[0028] Fig.10 A partially cutaway three-dimensional structural schematic diagram of the back side of a constant temperature and constant flow atmospheric sampling device proposed by the present invention;

[0029] Fig.11 A schematic diagram of the side-section axonometric structure of a constant-temperature and constant-flow atmospheric sampling device proposed by the present invention;

[0030] Fig.12 The present invention proposes Fig.11A schematic diagram of the partial enlarged structure of the middle E area;

[0031] Fig.13 This is a schematic diagram of the back-section axonometric structure of a constant temperature and constant flow atmospheric sampling device proposed by the present invention;

[0032] Fig.14 This is a partial front three-dimensional structural schematic diagram of a constant temperature and constant flow atmospheric sampling device proposed by the present invention.

[0033] In the figure: 1. main frame; 2. bearing plate; 3. upper T-tube; 4. outer T-tube; 5. ventilation pipe; 6. bracket; 7. temperature sensor; 8. wind speed sensor; 9. heating wire; 10. guide plate; 11. control panel; 12. processing controller; 13. battery; 14. vertical frame; 15. positioning frame; 16. storage barrel; 17. baffle; 18. T-piston; 19. conical frustum; 20. lower T-tube; 21. sealing ring; 22. mounting plate; 23. one-way valve; 24. dust net; 25. hollow axle; 26, support seat; 27, electric motor; 28, rocker arm; 29, fixed axis; 30, connecting rod; 31, Z-shaped frame; 32, L-shaped frame; 33, bevel buckle; 34, guide rod; 35, snap-on spring; 36, unlocking bevel block; 37, connecting frame; 38, bevel fixing frame; 39, reciprocating frame; 40, driving hole; 41, cross block; 42, handle; 43, top plate; 44, driving shaft; 45, rack; 46, ratchet; 47, gear; 48, connecting ring; 49, snap teeth; 50, driving spring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Reference Figure 1-Figure 14A constant temperature and constant flow atmospheric sampling device comprises a main frame 1, a bearing plate 2 is slidably provided on the upper side of the bottom of the main frame 1, a plurality of storage components are provided on the upper side of the bearing plate 2, and the storage components are used to store air. The storage components comprise a vertical frame 14, the vertical frame 14 is fixed on the upper side of the bearing plate 2, a triangular reinforcing plate is fixedly provided between the vertical frame 14 and the bearing plate 2, a positioning frame 15 is fixedly provided on one side of the vertical frame 14, a storage barrel 16 is detachably provided on the inner side of the positioning frame 15, the positioning frame 15 and the storage barrel 16 are detachably connected by bolts, two baffles 17 are fixedly provided on the lower side of the positioning frame 15, a T-type piston 18 is slidably provided on the inner side of the storage barrel 16, and the T-type piston 18 and the storage barrel 16 are connected by a dynamic seal. Before collecting air, the storage barrels 16 need to be placed in the positioning frame 15 first, and then the bolts between the positioning frame 15 and the storage barrel 16 are tightened so that the storage barrel 16 will not loosen, and then proceed to the next step.

[0036] like Figure 1-3 , Figure 5-6 , Figure 8 , Fig.11 As shown, an airflow detection control component is provided on the upper side of the main frame 1, and the airflow detection control component is used to detect the airflow velocity and airflow temperature. The airflow detection control component is used to control the airflow temperature. The airflow detection control component includes an upper T-tube 3, and a through hole is provided on the upper side of the main frame 1. The upper T-tube 3 is fixed on the inner side of the through hole. An outer T-tube 4 is rotatably provided on the outer periphery of the upper T-tube 3. The outer T-tube 4 is located on the upper side of the main frame 1. The outer T-tube 4 is detachably connected to the main frame 1 by bolts. A vent pipe 5 is fixed on the outer periphery of the outer T-tube 4. The vent pipe 5 is a conical structure with different diameters at both ends. The inner side of the vent pipe 5 is fixed. A bracket 6, a temperature sensor 7, and a wind speed sensor 8 are provided. A heating wire 9 is fixedly provided on one side of the bracket 6. The outer T-tube 4 is located between the heating wire 9 and the temperature sensor 7. A direction-changing guide plate 10 is fixedly provided on the outer periphery of the ventilation pipe 5. The direction-changing guide plate 10 is located above the ventilation pipe 5. Before collecting air, it is necessary to determine whether the direction of the ventilation pipe 5 does not change or changes with the wind direction. When the direction of the ventilation pipe 5 does not need to change, it is necessary to tighten the bolts between the outer T-tube 4 and the main frame 1. When the direction of the ventilation pipe 5 needs to change with the wind direction, it is necessary to unscrew the bolts between the outer T-tube 4 and the main frame 1.

[0037] like Figure 4 , Figure 6As shown, a conical truncated cone 19 is fixedly provided at the lower end of the T-shaped piston 18, an inlet and outlet assembly is provided on the upper side of the storage barrel 16, and the inlet and outlet assembly includes a lower T-shaped tube 20, a circular hole is provided on the upper side of the storage barrel 16, and the lower T-shaped tube 20 is fixed on the inner side of the circular hole, and a sealing ring 21 is fixedly provided on the lower side of the upper T-shaped tube 3 and the upper side of the lower T-shaped tube 20, and the two sealing rings 21 can be in contact and fit, and a mounting plate 22 is fixedly provided on the inner side of the lower T-shaped tube 20, and two mounting plates 22 are fixedly provided on the upper side of the mounting plate 22 through a pipeline. A one-way valve 23 is provided, and a dustproof net 24 is fixedly arranged on the upper side of the one-way valve 23. The two one-way valves 23 are respectively: an intake one-way valve and an exhaust one-way valve. The dustproof net 24 is fixed on the intake one-way valve. When air is pumped into the storage barrel 16, the intake one-way valve will open, and the air will enter the storage barrel 16 through the intake one-way valve. The dustproof net 24 can prevent dust from entering the storage barrel 16. At this time, the exhaust one-way valve is in a closed state. When the air in the storage barrel 16 is discharged, the opposite is true.

[0038] like Figure 2 , Figure 5 , Figure 7-9 , Fig.11 , Fig.13As shown, an exhaust component is provided on the inner side of the main frame 1, and the exhaust component is used to draw air into the storage component. The exhaust component includes a hollow shaft 25, and a support seat 26 is rotatably provided on the outer periphery of the hollow shaft 25. The support seat 26 is fixed to the upper bottom side of the main frame 1, and an electric motor 27 is fixed on one side of the support seat 26. The electric motor 27 is electrically connected to the processing controller 12 through a wire, and the shaft end of the electric motor 27 is connected to the outer periphery of the hollow shaft 25 through a bevel gear transmission. A rocker arm 28 is fixed on the outer periphery of the hollow shaft 25, and a fixed shaft 29 is fixed on one side of the rocker arm 28. A connecting rod 30 is rotatably provided on the outer periphery of the fixed shaft 29, and a Z-shaped frame 31 is rotatably provided on the upper end of the connecting rod 30. The Z-shaped L-shaped frames 32 are fixedly provided on both sides away from the frame 31, and the L-shaped frame 32 slides on the inner wall of the main frame 1. An automatic clamping and disengaging component is provided on the Z-shaped frame 31, and the automatic clamping and disengaging component includes a bevel buckle 33. A movable hole is provided on the lower side of the Z-shaped frame 31, and the bevel buckle 33 slides on the inner side of the movable hole. A guide rod 34 is fixed on the inner side of the movable hole, and the bevel buckle 33 slides on the outer periphery of the guide rod 34. A clamping spring 35 is fixedly provided between the bevel buckle 33 and the Z-shaped frame 31, and the bevel buckle 33 can be clamped and matched with the conical frustum 19. An unlocking bevel block 36 is fixedly provided on one side of the bevel buckle 33, and a connecting frame 37 is fixedly provided on the inner wall of the main frame 1. A bevel fixing frame 38 is fixed on the side, and the bevel fixing frame 38 can contact and cooperate with the unlocking bevel block 36. An anti-collision groove is provided on one side of the Z-frame 31, and the bevel fixing frame 38 can be located inside the anti-collision groove. When air sampling is required, it is necessary to control the electric motor 27 to rotate. When the electric motor 27 rotates, it will drive the hollow shaft 25 and the rocker arm 28 to rotate through the bevel gear. When the rocker arm 28 rotates, it will drive the Z-frame 31 to move up and down through the fixed shaft 29 and the connecting rod 30. When the Z-frame 31 moves to the highest point, the bevel buckle 33 can pass over the conical table 19, so that the conical table 19 is clamped between the bevel buckle 33 and the Z-frame 31, and then the Z-frame 31 will start to descend. When the Z-shaped frame 31 descends, it will drive the conical table 19 and the T-shaped piston 18 to descend together. At this time, the air in the ventilation pipe 5 can be sucked into the storage barrel 16 through the outer T-shaped tube 4, the upper T-shaped tube 3, the lower T-shaped tube 20 and a one-way valve 23, so that automatic air extraction sampling can be performed. When the Z-shaped frame 31 is about to move to the middle position, the unlocking bevel block 36 will contact the bevel fixing frame 38, and then the bevel buckle 33 will move away from the conical table 19. When the Z-shaped frame 31 moves to the middle position, the bevel buckle 33 will be separated from the conical table 19. At this time, the conical table 19 will not be stuck between the bevel buckle 33 and the Z-shaped frame 31, so that automatic card removal can be completed, and air extraction sampling is also completed at this time.

[0039] like Figure 1-2 , Figure 5 , Figure 8 , Fig.13As shown, an operation processing component is provided on one side of the main frame 1, and the operation processing component includes a control panel 11, a processing controller 12, and a battery 13. A mounting hole is provided on one side of the main frame 1, and the control panel 11 is fixed on the inner side of the mounting hole, and the processing controller 12 and the battery 13 are fixed on the inner wall of the main frame 1. The control panel 11, the battery 13, the temperature sensor 7, the wind speed sensor 8, and the heating wire 9 are electrically connected to the processing controller 12 through a wire or a wire and a conductive slip ring. When sampling air, it is necessary to obtain the temperature of the airflow through the temperature sensor 7. If it is necessary to heat the air to ensure that the airflow temperature is relatively constant, the heating wire 9 can be turned on by the processing controller 12 to heat the air, thereby controlling the airflow temperature. Moreover, when sampling air, the airflow velocity can be obtained through the wind speed sensor 8, thereby When the airflow is relatively stable, air sampling is carried out to ensure that the airflow temperature and airflow velocity are relatively constant during sampling, and uniform sampling can be carried out. The specific principle is: the control panel 11 and the battery 13 are electrically connected to the processing controller 12 through wires, the temperature sensor 7, the wind speed sensor 8, and the heating wire 9 are electrically connected to the processing controller 12 through wires and conductive slip rings. A conductive slip ring is required for electrical connection at the rotation point between the external T-tube 4 and the main frame 1, and the processing controller 12 is connected to the external charging port through a wire. Specifically: various parameters can be set through the control panel 11 before use, the temperature sensor 7 will transmit the temperature information to the processing controller 12, and the wind speed sensor 8 will transmit the wind speed information to the processing controller 12. The processing controller 12 can control the heating wire 9 and the electric motor 27 according to the received information.

[0040] like Figure 5 , Figure 10-13As shown, a pushing component is provided between the air extraction component and the supporting plate 2, and the pushing component is located on the upper bottom side of the main frame 1. The pushing component is used to drive the supporting plate 2 to translate, and the air extraction component is used to drive the pushing component. The pushing component includes a reciprocating frame 39, and the reciprocating frame 39 slides on the upper bottom side of the main frame 1. A driving hole 40 is provided on one side of the reciprocating frame 39, and the fixed shaft 29 slides on the inner side of the driving hole 40. A cross groove is provided on one side of the reciprocating frame 39, and a cross block 41 is slidably provided on the inner side of the cross groove. The cross block 41 can slide up and down, and the cross block 41 and the reciprocating frame 39 are detachably connected by bolts. A handle 42 is fixed on the upper side of the cross block 41, and a top plate 43 is slidably provided on the outer periphery of the handle 42, and the top plate 43 is fixed on one side of the reciprocating frame 39. A driving shaft 44 is fixed on one side of the cross block 41. The driving shaft A one-way drive assembly is provided between 44 and the carrier plate 2, and the one-way drive assembly includes a rack 45 and a gear 47. The rack 45 is fixed to the upper side of the carrier plate 2, and a ratchet 46 is fixed on the outer periphery of the drive shaft 44. The gear 47 can be connected to the rack 45 by meshing, and the gear 47 and the rack 45 can be in contact, fit and separate. Two connecting rings 48 are fixed on the inner side of the gear 47, and the connecting ring 48 rotates on the outer periphery of the drive shaft 44. A plurality of latch teeth 49 are provided on the inner side of the gear 47 for rotation, and the latch teeth 49 can be in contact and fit with the outer periphery of the ratchet 46. A driving spring 50 is fixed between one side of the latch teeth 49 and the inner side of the gear 47. During the air extraction sampling period, when the Z-shaped frame 31 drops to the middle position, the bevel buckle 33 will disengage from the conical frustum 19 to complete the automatic disengagement. At this time, the reciprocating frame 39 will move to the far right (such as Fig.13 The rocker arm 28 continues to rotate, and the Z-shaped frame 31 continues to descend. At this time, the reciprocating frame 39 will translate from right to left. During the translation of the reciprocating frame 39 from right to left (as shown in FIG. Fig.13The gear 47 cannot rotate at this time, so the reciprocating frame 39 translates from right to left to drive the rack 45 and the carrier plate 2 to translate, so that the next storage bucket 16 can be pushed to the sampling position below the upper T-tube 3, thereby realizing automatic switching and facilitating continuous sampling. When the reciprocating frame 39 moves to the leftmost side, the next storage bucket 16 will move into place. At this time, the Z-frame 31 will also rise to the middle position, and then the rocker arm 28 continues to rotate, and the reciprocating frame 39 will translate from left to right. At this time, the gear 49 cannot clamp the ratchet 46, and the gear 47 will rotate, thereby failing to drive the carrier plate 2 to translate, thereby realizing one-way drive. When the reciprocating frame 39 translates from left to right to the middle position, the Z-frame 31 will also rise to the highest position, so that the bevel buckle 33 can be The conical cone 19 is clamped for the second time, and the rocker arm 28 can continuously rotate to perform continuous air extraction sampling. When all the storage barrels 16 are collected, the storage barrel 16 needs to be replaced. When replacing the storage barrel 16, it is necessary to loosen the bolts between the positioning frame 15 and the storage barrel 16, and then replace the unused storage barrel 16, and then it is necessary to move the supporting plate 2 back to its original position. When the supporting plate 2 needs to be reset, it is necessary to first unscrew the bolts between the cross block 41 and the reciprocating frame 39, and then pull up the cross block 41, the drive shaft 44 and the gear 47 through the handle 42, and then the supporting plate 2 can be moved back to its original position. After the supporting plate 2 is reset, it is necessary to lower the cross block 41, the drive shaft 44 and the gear 47 back to their original positions so that the gear 47 and the rack 45 are meshed, and then tighten the bolts between the cross block 41 and the reciprocating frame 39 to complete the reset, and then it can continue to be used.

[0041] It should be noted that the one-way valve 23, control panel 11, battery 13, temperature sensor 7, wind speed sensor 8, heating wire 9, conductive slip ring, processing controller 12, and electric motor 27 are all prior arts, and their specific functions and usage methods are not described in detail in this article.

Claims

1. A constant temperature and constant flow atmospheric sampling device, comprising a main frame (1), characterized in that: An airflow detection control component is provided on the upper side of the main frame (1), the airflow detection control component is used to detect the airflow velocity and airflow temperature, the airflow detection control component is used to control the airflow temperature, a bearing plate (2) is slidably provided on the upper side of the bottom of the main frame (1), a plurality of storage components are provided on the upper side of the bearing plate (2), the storage components are used to store air, an exhaust component is provided on the inner side of the main frame (1), the exhaust component is used to draw air into the storage component, a pushing component is provided between the exhaust component and the bearing plate (2), the pushing component is used to drive the bearing plate (2) to translate, and the exhaust component is used to drive the pushing component; The storage assembly comprises a storage barrel (16), a T-shaped piston (18) is slidably provided inside the storage barrel (16), and a conical truncated cone (19) is fixedly provided at the lower end of the T-shaped piston (18); The air extraction component comprises a hollow shaft (25), a support seat (26) is rotatably provided on the outer circumference of the hollow shaft (25), the support seat (26) is fixed to the upper bottom side of the main frame (1), an electric motor (27) is fixedly provided on one side of the support seat (26), the shaft end of the electric motor (27) is connected to the outer circumference of the hollow shaft (25) via a bevel gear transmission, a rocker arm (28) is fixedly provided on the outer circumference of the hollow shaft (25), a fixed shaft (29) is fixedly provided on one side of the rocker arm (28), a connecting rod (30) is rotatably provided on the outer circumference of the fixed shaft (29), a Z-shaped frame (31) is rotatably provided on the upper end of the connecting rod (30), L-shaped frames (32) are fixedly provided on two sides of the Z-shaped frame (31) that are away from each other, the L-shaped frame (32) slides on the inner wall of the main frame (1), and an automatic clamping and unclamping component is provided on the Z-shaped frame (31); The automatic engaging and disengaging assembly comprises a bevel buckle (33); a movable hole is provided at the lower side of the Z-shaped frame (31); the bevel buckle (33) slides inside the movable hole; a guide rod (34) is fixedly provided inside the movable hole; the bevel buckle (33) slides on the outer periphery of the guide rod (34); a clamping spring (35) is fixedly provided between the bevel buckle (33) and the Z-shaped frame (31); the bevel buckle (33) can be engaged with the conical truncated cone (19); an unlocking bevel block (36) is fixedly provided on one side of the bevel buckle (33); a connecting frame (37) is fixedly provided on the inner wall of the main frame (1); a bevel fixing frame (38) is fixedly provided on one side of the connecting frame (37); the bevel fixing frame (38) can contact and engage with the unlocking bevel block (36); and an anti-collision groove is provided on one side of the Z-shaped frame (31).

2. A constant temperature and constant flow atmospheric sampling device according to claim 1, characterized in that: The airflow detection control component comprises an upper T-tube (3), a through hole is provided on the upper side of the main frame (1), the upper T-tube (3) is fixed on the inner side of the through hole, an outer T-tube (4) is rotatably provided on the outer periphery of the upper T-tube (3), the outer T-tube (4) is located on the upper side of the main frame (1), the outer T-tube (4) and the main frame (1) are detachably connected via bolts, a vent pipe (5) is fixed on the outer periphery of the outer T-tube (4), a bracket (6), a temperature sensor (7), and a wind speed sensor (8) are fixed on the inner side of the vent pipe (5), a heating wire (9) is fixed on one side of the bracket (6), a direction-changing guide plate (10) is fixed on the outer periphery of the vent pipe (5), and an operation processing component is provided on one side of the main frame (1).

3. A constant temperature and constant flow atmospheric sampling device according to claim 2, characterized in that: The operation processing component comprises a control panel (11), a processing controller (12), and a battery (13); a mounting hole is provided on one side of the main frame (1); the control panel (11) is fixed to the inner side of the mounting hole; the processing controller (12) and the battery (13) are fixed to the inner wall of the main frame (1); and the control panel (11), the battery (13), the temperature sensor (7), the wind speed sensor (8), and the heating wire (9) are electrically connected to the processing controller (12) via a wire or a wire and a conductive slip ring.

4. A constant temperature and constant flow atmospheric sampling device according to claim 3, characterized in that: The storage assembly further comprises a vertical frame (14), the vertical frame (14) being fixed on the upper side of the bearing plate (2), a positioning frame (15) being fixedly provided on one side of the vertical frame (14), the inner side of the positioning frame (15) being detachably connected to a storage barrel (16), two baffles (17) being fixedly provided on the lower side of the positioning frame (15), and an air inlet and outlet assembly being provided on the upper side of the storage barrel (16).

5. A constant temperature and constant flow atmospheric sampling device according to claim 4, characterized in that: The air inlet and outlet assembly comprises a lower T-tube (20), a circular hole is provided on the upper side of the storage barrel (16), the lower T-tube (20) is fixed on the inner side of the circular hole, a sealing ring (21) is fixedly provided on the lower side of the upper T-tube (3) and the upper side of the lower T-tube (20), and the two sealing rings (21) are capable of contacting and matching, a mounting plate (22) is fixedly provided on the inner side of the lower T-tube (20), and two one-way valves (23) are fixedly provided on the upper side of the mounting plate (22) and connected to each other through a pipeline, and a dustproof net (24) is fixedly provided on the upper side of one of the one-way valves (23).

6. A constant temperature and constant flow atmospheric sampling device according to claim 3, characterized in that: The electric motor (27) is electrically connected to the processing controller (12) via a wire.

7. A constant temperature and constant flow atmospheric sampling device according to claim 1, characterized in that: The pushing assembly comprises a reciprocating frame (39), the reciprocating frame (39) slides on the upper side of the bottom of the main frame (1), a driving hole (40) is provided on one side of the reciprocating frame (39), the fixed shaft (29) slides on the inner side of the driving hole (40), a cross groove is provided on one side of the reciprocating frame (39), a cross block (41) is slidably provided on the inner side of the cross groove, the cross block (41) and the reciprocating frame (39) are detachably connected by bolts, a handle (42) is fixedly provided on the upper side of the cross block (41), a top plate (43) is slidably provided on the outer periphery of the handle (42), the top plate (43) is fixed on one side of the reciprocating frame (39), a driving shaft (44) is fixedly provided on one side of the cross block (41), and a one-way driving assembly is provided between the driving shaft (44) and the bearing plate (2).

8. A constant temperature and constant flow atmospheric sampling device according to claim 7, characterized in that: The one-way drive assembly comprises a rack (45) and a gear (47), wherein the rack (45) is fixed on the upper side of the bearing plate (2), a ratchet (46) is fixedly provided on the outer periphery of the drive shaft (44), the gear (47) can be connected to the rack (45) by meshing, and the gear (47) and the rack (45) can be in contact, fit and separate, two connecting rings (48) are fixedly provided on the inner side of the gear (47), the connecting ring (48) rotates on the outer periphery of the drive shaft (44), a plurality of latching teeth (49) are rotatably provided on the inner side of the gear (47), the latching teeth (49) can be in contact, fit and engage with the outer periphery of the ratchet (46), and a driving spring (50) is fixedly provided between one side of the latching teeth (49) and the inner side of the gear (47).

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