Aerosol particle size distribution measuring device

Abstract

The utility model is suitable for the technical field of aerosol distribution measurement, and provides an aerosol particle size distribution measuring device which comprises a shell, a constant flow pipeline; a transparent part; the air exhaust unit is mounted at the other end of the constant flow pipeline; the filtering unit is fixed on one side, close to the air exhaust unit, of the transparent part; the light and shadow measuring unit is used for measuring the distribution condition of the aerosol passing through the transparent part; the one-way turnover flow choking mechanism is arranged on one side, close to the transparent part, of the filtering unit and is used for controlling the circulation state of the constant flow pipeline; the knocking mechanism is used for knocking the filtering unit; the power mechanism is used for converting the flowing potential energy into mechanical energy; the transmission mechanism is used for connecting the power mechanism and the knocking mechanism so as to enable the knocking mechanism to operate; the sensing limiting mechanism is used for sensing the operation of the one-way overturning flow blocking mechanism so as to control the transmission mechanism to limit the control of the knocking mechanism; the device has a good measurement effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of aerosol distribution measurement, in particular to an aerosol particle size distribution measurement device. Background Art

[0002] Aerosol refers to a gaseous dispersion system composed of solid or liquid particles suspended in a gas medium. Clouds, fog, and dust in the sky, smoke from unburned fuel in boilers and various engines used in industry and transportation, solid dust formed during mining, quarrying, stone processing, and grain processing, artificial masking smoke and toxic smoke are all specific examples of aerosols. The aerosol particle size distribution measurement device can be used in various fields that require the measurement of aerosol particles, such as air pollution monitoring, industrial dust emission control, indoor air purification, etc. By using this device, detailed information on aerosol particles can be obtained, thereby providing strong support for research and application in related fields.

[0003] The aerosol particle size distribution measuring device needs to provide a constant flow gas source by pumping air when in use, but the prior art lacks verification means, and the measurement is performed by a single system means, and the measurement results have certain errors and are accidental.

[0004] Therefore, how to provide an aerosol particle size distribution measurement device is a problem that those skilled in the art urgently need to solve. Utility Model Content

[0005] The utility model aims to provide an aerosol particle size distribution measuring device, aiming to solve the problems mentioned in the background technology.

[0006] The utility model is implemented in this way: the aerosol particle size distribution measuring device comprises:

[0007] case;

[0008] A constant flow pipe, wherein the constant flow pipe is fixed on the housing;

[0009] A transparent portion, the transparent portion being arranged at one end of the constant flow pipe;

[0010] An air extraction unit, which is installed at the other end of the constant flow pipeline;

[0011] A filter unit, wherein the filter unit is fixed to a side of the transparent portion close to the air extraction unit;

[0012] A light and shadow measuring unit, the light and shadow measuring unit is used to measure the distribution of aerosol passing through the transparent portion;

[0013] A one-way reversing flow blocking mechanism, which is arranged on a side of the filter unit close to the transparent portion and is used to control the flow state of the constant flow pipeline;

[0014] A knocking mechanism, the knocking mechanism is used to knock the filter unit;

[0015] A power mechanism, the power mechanism is used to convert flow potential energy into mechanical energy;

[0016] A transmission mechanism, the transmission mechanism is used to connect the power mechanism and the knocking mechanism to enable the knocking mechanism to operate;

[0017] An inductive limit mechanism, which is used to sense the operation of the one-way flip flow blocking mechanism, so as to limit the control of the knocking mechanism by the control transmission mechanism;

[0018] The weighing and collecting mechanism is arranged on both sides of the one-way flip flow blocking mechanism, and is used to measure the weight of aerosol particles.

[0019] Preferably, the one-way flip flow blocking mechanism comprises:

[0020] Flip plates, the flip plates are symmetrically and tiltedly distributed, and the higher ends of the two flip plates are butted against each other;

[0021] A first rotating shaft, the first rotating shaft is fixedly connected to a lower end of the flip plate, and the first rotating shaft is rotatably connected to the constant flow pipeline;

[0022] A first elastic member, wherein the first elastic member is fixedly connected to the inner wall of the constant flow pipe and the bottom wall of the flip plate respectively;

[0023] A guide sealing block, wherein the guide sealing block is fixed to a higher end of the flip plate;

[0024] The constant flow pipe is provided with an inclined groove opposite to the top surface of the flip plate.

[0025] Preferably, the knocking mechanism comprises:

[0026] A second fixing plate, wherein the second fixing plate is fixed on the inner wall of the constant flow pipe;

[0027] a second guide slide bar, the second guide slide bar being slidably connected to the second fixing plate;

[0028] a second positioning block, the second positioning block being fixed to an end of the second guide slide bar away from the filter unit;

[0029] An elastic support assembly, the elastic support assembly is used to elastically support the second guide slide bar;

[0030] An intermittent pulling assembly is used to intermittently pull the second positioning block to move in a direction away from the filter unit.

[0031] Preferably, the elastic support assembly comprises:

[0032] a second movable plate, the second movable plate being fixed on the second guide sliding rod;

[0033] a third elastic member, the third elastic member being sleeved on the second guide slide bar and being located between the second movable plate and the second fixed plate;

[0034] A stopper is fixed on the second fixed plate and is opposite to the second movable plate.

[0035] Preferably, the intermittent pulling assembly comprises:

[0036] A rotating wheel, the rotating wheel is driven to rotate by a transmission mechanism;

[0037] A pull rope, one end of which is fixedly connected to the second positioning block, and the other end of which is wound around the rotating wheel;

[0038] A clamping slider, wherein the clamping slider is slidably disposed in the rotating wheel, and one end of the clamping slider is arc-shaped and partially embedded in the weighing and collecting mechanism;

[0039] A fourth elastic member is fixedly connected to the inner wall of the rotating wheel and the bottom wall of the clamping sliding block respectively.

[0040] Preferably, the power mechanism comprises:

[0041] A transition shell, wherein the transition shell is fixedly connected to the constant flow pipeline;

[0042] A second rotating shaft, the second rotating shaft is rotatably disposed in the transition shell and has two ends extending outside the transition shell;

[0043] The fan blades are evenly fixed on the second rotating shaft and are opposite to the constant flow pipe.

[0044] Preferably, the transmission mechanism comprises:

[0045] a second cylindrical spur gear, the second cylindrical spur gear being driven to rotate by a power mechanism;

[0046] A second gear rod, the second gear rod being meshedly connected with the second cylindrical spur gear;

[0047] A trapezoidal slider, wherein the trapezoidal slider is fixedly connected to the lower end of the second gear rod;

[0048] A first gear rod, wherein the first gear rod is slidably connected to the trapezoidal slider, and an inner wall of the first gear rod is fixedly connected to an end surface of the trapezoidal slider via a fourth elastic member;

[0049] a third rotating shaft, the third rotating shaft being rotatably connected to the constant flow pipeline;

[0050] A first cylindrical spur gear, which is mounted on the third rotating shaft and meshed with the first gear rod;

[0051] A concave limiting frame is fixed to the lower end of the first gear rod, and the concave limiting frame is slidably connected to the inner wall of the shell through a connecting slider.

[0052] Preferably, the induction limiting mechanism comprises:

[0053] a first fixing plate, wherein the first fixing plate is fixed in the housing;

[0054] A first guide slide bar, wherein the first guide slide bar is slidably connected to the first fixed plate and the constant flow pipe, and one end of the first guide slide bar is located in the constant flow pipe and opposite to the one-way flip flow blocking mechanism;

[0055] A first movable plate, wherein the first movable plate is fixedly connected to the first guide sliding rod;

[0056] A baffle, the baffle being fixed to one end of the first movable plate close to the third rotating shaft;

[0057] A rotating rod, the rotating rod is fixed on the third rotating shaft and is located on a side of the baffle away from the one-way flip flow blocking mechanism;

[0058] a second elastic member, wherein the second elastic member is sleeved on the first guide slide bar, and the second elastic member is located between the first movable plate and the first fixed plate;

[0059] A first positioning block is fixed to an end of the first guide slide bar away from the one-way flip flow blocking mechanism.

[0060] Preferably, the weighing and collecting mechanism comprises:

[0061] A weighing shell, wherein the weighing shell is fixed to one side of the chute;

[0062] A collecting shell, the collecting shell being in communication with the weighing shell;

[0063] A mounting seat, the mounting seat is horizontally arranged in the weighing shell and the collecting shell;

[0064] A weighing device, the weighing device is fixed on the mounting base, and the weighing device is located below the chute; and

[0065] A flip support assembly is used to adjust the position of the mounting seat.

[0066] Preferably, the flip support assembly comprises:

[0067] A cylinder, wherein the cylinder is mounted on the outer wall of the collecting shell;

[0068] A first support rod, the first support rod is connected to a bottom surface of one end of the mounting seat through a first hinge frame;

[0069] A second support rod, the second support rod is connected to the bottom surface of the other end of the mounting seat through a second hinge frame, and the second support rod is slidably connected to the weighing shell;

[0070] A connecting block, the connecting block is fixedly connected to the output end of the cylinder;

[0071] A connecting rod, both ends of which are hinged to the connecting block and the second supporting rod respectively.

[0072] Compared with the prior art, the utility model has the following beneficial effects: by setting a shell, a constant flow pipeline, a transparent part, an air extraction unit, a filtering unit, a light and shadow measuring unit, a one-way flip flow blocking mechanism, a knocking mechanism, a power mechanism, a transmission mechanism, an inductive limit mechanism and a weighing and collecting mechanism, when in use, by controlling the operation of the air extraction unit, the air extraction unit starts to extract air from the constant flow pipeline, and the external airflow passes through the constant flow pipeline and is finally discharged through the air extraction unit. When the constant airflow passes through the transparent part, the light and shadow measuring unit can infer the diameter and particle size distribution of the particles by analyzing the intensity and angle of the scattered light. At this time, the air pressure makes the one-way flip flow blocking mechanism in a starting state, the transparent part flows, and the flow potential energy is converted into mechanical potential energy through the power mechanism. At this time, the inductive limit mechanism senses the one-way flip flow blocking mechanism at In the starting state, that is, when the one-way flip flow-blocking mechanism makes the transparent part in a flow state, the inductive limit mechanism controls the transmission mechanism and cannot drive the knocking mechanism to operate. After the measurement is completed, that is, when the one-way flip flow-blocking mechanism makes the transparent part change from a flow state to a non-flow state, the inductive limit mechanism releases the control, so that the transmission mechanism uses the mechanical potential energy converted by the power mechanism to drive the knocking mechanism to operate. The knocking mechanism knocks on the filter unit, and the aerosol particles fall on the one-way flip flow-blocking mechanism, and are finally collected by the weighing and collecting mechanism. This allows the device to filter aerosol particles and purify the air while measuring the aerosol particle size distribution, which is energy-saving and environmentally friendly. It can also be verified by weighing and comparing with the results of the light and shadow measurement unit to obtain more accurate results. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0074] Figure 1 A schematic structural diagram of an aerosol particle size distribution measuring device provided in an embodiment of the utility model.

[0075] Figure 2 for Figure 1 Schematic diagram of the structure at point A.

[0076] Figure 3 A schematic diagram of the structure of a power mechanism in an aerosol particle size distribution measuring device provided in an embodiment of the utility model.

[0077] Figure 4 for Figure 1 Schematic diagram of the structure at point B.

[0078] Figure 5 for Figure 1 Schematic diagram of the structure at C.

[0079] In the accompanying drawings: 1-housing; 2-constant flow pipe; 3-transparent part; 4-exhaust unit; 5-filter unit; 6-display module; 7-control module; 8-light scattering module; 9-signal processing module; 10-light source module; 11-flip plate; 12-first elastic member; 13-guide sealing block; 14-first rotating shaft; 15-bevel groove; 16-transition shell; 17-second rotating shaft; 18-fan blade; 19-third rotating shaft; 20-first cylindrical spur gear; 21-first gear rod; 22-trapezoidal slider; 23-second gear rod; 24-second cylindrical spur gear; 25-concave limit frame; 26-first fixed plate; 27-first guide slide rod; 28-first movable plate; 29-baffle; 30-rotating rod; 31-second elastic member; 32-first positioning block; 33-second fixed plate; 34-second guide slide bar; 35-second positioning block; 36-pull rope; 37-rotating wheel; 38-second movable plate; 39-third elastic member; 40-block; 41-clamping slide block; 42-fourth elastic member; 43-weighing shell; 44-collecting shell; 45-mounting seat; 46-weighing device; 47-first support rod; 48-second support rod; 49-cylinder; 50-connecting block; 51-connecting rod; 100-one-way flip blocking mechanism; 200-knocking mechanism; 300-power mechanism; 400-transmission mechanism; 500-inductive limit mechanism; 600-weighing collection mechanism. DETAILED DESCRIPTION

[0080] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0081] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0082] like Figure 1 , Figure 2FIG. 1 is a schematic diagram of a structure of an aerosol particle size distribution measuring device provided by an embodiment of the utility model, comprising:

[0083] Shell 1;

[0084] A constant flow pipe 2, wherein the constant flow pipe 2 is fixed on the housing 1;

[0085] A transparent portion 3, wherein the transparent portion 3 is arranged at one end of the constant flow pipe 2;

[0086] An air extraction unit 4, which is installed at the other end of the constant flow pipeline 2;

[0087] A filter unit 5, wherein the filter unit 5 is fixed to a side of the transparent portion 3 close to the air extraction unit 4;

[0088] A light and shadow measuring unit, which is used to measure the distribution of aerosol passing through the transparent portion 3;

[0089] A one-way reversing flow blocking mechanism 100, which is arranged on a side of the filter unit 5 close to the transparent portion 3, and is used to control the flow state of the constant flow pipe 2;

[0090] A knocking mechanism 200, wherein the knocking mechanism 200 is used to knock the filter unit 5;

[0091] A power mechanism 300, wherein the power mechanism 300 is used to convert flow potential energy into mechanical energy;

[0092] A transmission mechanism 400, wherein the transmission mechanism 400 is used to connect the power mechanism 300 and the knocking mechanism 200 so as to enable the knocking mechanism 200 to operate;

[0093] The sensing limit mechanism 500 is used to sense the operation of the one-way flip flow blocking mechanism 100, so as to achieve the control of the transmission mechanism 400 to limit the knocking mechanism 200;

[0094] The weighing and collecting mechanism 600 is disposed on both sides of the one-way flip flow blocking mechanism 100 and is used to measure the weight of aerosol particles.

[0095] In the embodiment of the utility model, when in use, by controlling the operation of the air extraction unit 4, the air extraction unit 4 starts to extract air from the constant flow pipe 2, and the external airflow passes through the constant flow pipe 2 and is finally discharged through the air extraction unit 4. When the constant airflow passes through the transparent part 3, the light and shadow measurement unit can infer the diameter and particle size distribution of the particles by analyzing the intensity and angle of the scattered light. At this time, the air pressure makes the one-way flip flow blocking mechanism 100 in the starting state, the transparent part 3 flows, and the flow potential energy is converted into mechanical potential energy through the power mechanism 300. At this time, the sensing limit mechanism 500 senses that the one-way flip flow blocking mechanism 100 is in the starting state, that is, when the one-way flip flow blocking mechanism 100 makes the transparent part 3 in the flow state, the sensing limit mechanism 500 controls the transmission mechanism 4 00 cannot drive the knocking mechanism 200 to operate. After the measurement is completed, that is, when the one-way reversing flow-blocking mechanism 100 causes the transparent part 3 to be converted from a flowing state to a non-circulating state, the inductive limiting mechanism 500 releases the control over 40, so that the transmission mechanism 400 utilizes the mechanical potential energy converted by the power mechanism 300 to drive the knocking mechanism 200 to operate. The knocking mechanism 200 knocks on the filter unit 5, and the aerosol particles fall on the one-way reversing flow-blocking mechanism 100, and are finally collected by the weighing and collecting mechanism 600. This allows the device to filter aerosol particles and purify the air while measuring the aerosol particle size distribution, which is energy-saving and environmentally friendly. It can also be verified by weighing and comparing with the results of the light and shadow measurement unit to obtain more accurate results.

[0096] In one case of this embodiment, the light and shadow measurement unit includes:

[0097] A display module 6, wherein the display module 6 is fixed to one side of the housing 1;

[0098] A control module 7, wherein the control module 7 is disposed in the housing 1;

[0099] A light source module 10, wherein the light source module 10 is disposed on one side of the transparent portion 3;

[0100] a light scattering module 8, wherein the light scattering module 8 is arranged on the other side of the transparent portion 3;

[0101] The signal processing module 9 is arranged at one side of the light scattering module 8 .

[0102] Among them, the light source module 10 is used to provide sufficient light during the measurement process; the light scattering module 8 is responsible for measuring the scattering of light when it passes through aerosol particles. By analyzing the intensity and angle of the scattered light, the diameter and particle size distribution of the particles can be inferred; the signal processing module 9 is responsible for processing the signal output by the light scattering module 8 and converting it into analyzable data. The signal processing module 9 usually includes components such as amplifiers, filters, and ADC (analog-to-digital converter); the display module 6 is responsible for controlling the operation of the entire device, including the switching, data acquisition and processing of the light scattering module 8, etc. At the same time, it also needs to display the measurement results so that the user can intuitively understand the measurement results; the control module 7 is responsible for storing the measurement data locally or transmitting it to other devices. It can communicate with other devices via wired or wireless means.

[0103] like Figure 2 As shown, as a preferred embodiment of the utility model, the one-way flip flow blocking mechanism 100 includes:

[0104] The flip plates 11 are symmetrically and tiltedly distributed, and the higher ends of the two flip plates 11 are butted against each other;

[0105] A first rotating shaft 14, wherein the first rotating shaft 14 is fixedly connected to a lower end of the flip plate 11, and the first rotating shaft 14 is rotatably connected to the constant flow pipe 2;

[0106] A first elastic member 12, wherein the first elastic member 12 is fixedly connected to the inner wall of the constant flow pipe 2 and the bottom wall of the flip plate 11 respectively;

[0107] A guide sealing block 13, wherein the guide sealing block 13 is fixed to a higher end of the flip plate 11;

[0108] The constant flow pipe 2 is provided with an inclined groove 15 opposite to the top surface of the flip plate 11 .

[0109] In the embodiment of the utility model, when in use, by controlling the operation of the vacuum unit 4, the vacuum unit 4 starts to evacuate the constant flow pipe 2, and the external airflow passes through the constant flow pipe 2 and is finally discharged through the vacuum unit 4. When the constant airflow passes through the transparent part 3, the light and shadow measurement unit can infer the diameter and particle size distribution of the particles by analyzing the intensity and angle of the scattered light. At this time, the air pressure pulls the flip plate 11 to flip upward, and the flip plate 11 drives the first rotating shaft 14 to rotate. The airflow passes between the two flip plates 11, and when the vacuum unit 4 is no longer running, at this time, under the elastic force of the first elastic member 12, the flip plate 11 is reset, and the aerosol particles dropped from the filter unit 5 can fall from the inclined groove 15 along the inclined surface of the flip plate 11 and be collected in the weighing and collecting mechanism 600.

[0110] like Figure 3As shown, as another preferred embodiment of the utility model, the knocking mechanism 200 includes:

[0111] A second fixing plate 33, wherein the second fixing plate 33 is fixed on the inner wall of the constant flow pipe 2;

[0112] A second guide slide bar 34 , wherein the second guide slide bar 34 is slidably connected to the second fixing plate 33;

[0113] A second positioning block 35, wherein the second positioning block 35 is fixed to an end of the second guide slide rod 34 away from the filter unit 5;

[0114] An elastic support assembly, the elastic support assembly is used to elastically support the second guide slide bar 34;

[0115] The intermittent pulling assembly is used to intermittently pull the second positioning block 35 to move in a direction away from the filter unit 5 .

[0116] In the embodiment of the utility model, when in use, the intermittent pulling component intermittently pulls the second positioning block 35 toward the direction of the filter unit 5, and the second positioning block 35 drives the second guide slide bar 34 to slide along the second fixed plate 33, so that the elastic support component is compressed to generate elastic force. When the intermittent pulling component does not pull the second positioning block 35, the elastic force of the elastic support component drives the second guide slide bar 34 to suddenly slide downward along the second fixed plate 33, thereby knocking the filter unit 5, so that the aerosol particles passed by the filter unit 5 fall on the flip plate 11, and are collected by the weighing and collection mechanism 600.

[0117] In one case of this embodiment, the elastic support assembly includes:

[0118] A second movable plate 38, wherein the second movable plate 38 is fixed on the second guide slide bar 34;

[0119] A third elastic member 39, wherein the third elastic member 39 is sleeved on the second guide slide bar 34, and the third elastic member 39 is located between the second movable plate 38 and the second fixed plate 33;

[0120] The stopper 40 is fixed on the second fixed plate 33 and is opposite to the second movable plate 38 .

[0121] Among them, when the intermittent pulling component pulls the second positioning block 35 to move, the second positioning block 35 drives the second guide slide bar 34 and the second movable plate 38 to move, and the second movable plate 38 squeezes the third elastic member 39 until the second movable plate 38 moves to the stop block 40, and the second movable plate 38 cannot move. At this time, the intermittent pulling component stops driving the second positioning block 35.

[0122] In one aspect of this embodiment, the intermittent pulling assembly comprises:

[0123] A rotating wheel 37, wherein the rotating wheel 37 is driven to rotate by a transmission mechanism 400;

[0124] A pull rope 36, one end of which is fixedly connected to the second positioning block 35, and the other end of which is wound around the rotating wheel 37;

[0125] A clamping slider 41, wherein the clamping slider 41 is slidably disposed in the rotating wheel 37, and one end of the clamping slider 41 is arc-shaped and partially embedded in the weighing and collecting mechanism 600;

[0126] The fourth elastic member 42 is fixedly connected to the inner wall of the rotating wheel 37 and the bottom wall of the clamping slider 41. When the second movable plate 38 moves to the stopper 40, the second movable plate 38 cannot move. At this time, the clamping slider 41 is squeezed by the weighing and collecting mechanism 600 and retracts into the rotating wheel 37. After the clamping slider 41 is separated from the weighing and collecting mechanism 600, the elastic force of the third elastic member 39 drives the second movable plate 38 and the second guide slide bar 34 to reset. The second guide slide bar 34 suddenly slides downward along the second fixed plate 33, thereby knocking the filter unit 5, so that the aerosol particles passed by the filter unit 5 fall on the flip plate 11, and are collected by the weighing and collecting mechanism 600.

[0127] like Figure 1 As shown, as another preferred embodiment of the utility model, the power mechanism 300 includes:

[0128] A transition shell 16, wherein the transition shell 16 is fixedly connected to the constant flow pipeline 2;

[0129] A second rotating shaft 17, which is rotatably disposed in the transition shell 16 and has two ends extending outside the transition shell 16;

[0130] The fan blades 18 are evenly fixed on the second rotating shaft 17 and are opposite to the constant flow pipe 2.

[0131] In the embodiment of the utility model, when the air extraction unit 4 is started, the fan blades 18 are driven to rotate under the action of air pressure, and the fan blades 18 drive the second rotating shaft 17 to rotate, thereby converting the flow potential energy into mechanical energy.

[0132] like Figure 4 As shown, as another preferred embodiment of the present utility model, the transmission mechanism 400 includes:

[0133] A second cylindrical spur gear 24, wherein the second cylindrical spur gear 24 is driven to rotate by a power mechanism 300;

[0134] A second gear rod 23, wherein the second gear rod 23 is meshedly connected with a second cylindrical spur gear 24;

[0135] A trapezoidal slider 22, wherein the trapezoidal slider 22 is fixedly connected to the lower end of the second gear rod 23;

[0136] A first gear rod 21, wherein the first gear rod 21 is slidably connected to the trapezoidal slider 22, and the inner wall of the first gear rod 21 is fixedly connected to the end surface of the trapezoidal slider 22 via a fourth elastic member;

[0137] A third rotating shaft 19, the third rotating shaft 19 is rotatably connected to the constant flow pipeline 2;

[0138] A first cylindrical spur gear 20, wherein the first cylindrical spur gear 20 is mounted on the third rotating shaft 19 and meshedly connected with the first gear rod 21;

[0139] The concave limiting frame 25 is fixed to the lower end of the first gear rod 21 , and the concave limiting frame 25 is slidably connected to the inner wall of the housing 1 through a connecting slider.

[0140] In the embodiment of the utility model, when in use, the second cylindrical spur gear 24 is driven to rotate by the power mechanism 300, and the second cylindrical spur gear 24 drives the second gear rod 23 to move upward, and the second gear rod 23 drives the trapezoidal slider 22 to move upward. At this time, since the one-way flip blocking mechanism 100 is in the starting state and the constant flow pipeline 2 is in the flow state, the third rotating shaft 19 cannot rotate and the first gear rod 21 cannot move. Therefore, the second gear rod 23 drives the trapezoidal slider 22 to move upward, and the trapezoidal slider 22 stretches the fourth elastic member. When the measurement is completed, the one-way flip blocking mechanism 100 causes the transparent part 3 to be converted from the flow state to the non-flow state, and the induction limit mechanism 500 releases the control of 40. At this time, under the elastic force of the fourth elastic member, the first gear rod 21 is driven to move upward, the first gear rod 21 drives the first cylindrical spur gear 20 to rotate, and the first cylindrical spur gear 20 drives the third The rotating shaft 19 rotates, and the third rotating shaft 19 drives the rotating wheel 37 to rotate. The rotating wheel 37 winds up the pull rope 36, and the pull rope 36 pulls the second positioning block 35 to move. The second positioning block 35 drives the second guide slide bar 34 and the second movable plate 38 to move. The second movable plate 38 squeezes the third elastic member 39 until the second movable plate 38 moves to the stopper 40, and the second movable plate 38 cannot move. At this time, the clamping slider 41 is squeezed by the weighing and collecting mechanism 600 and retracts into the rotating wheel 37. After the clamping slider 41 is separated from the weighing and collecting mechanism 600, under the elastic force of the third elastic member 39, the second movable plate 38 and the second guide slide bar 34 are driven to reset. The second guide slide bar 34 suddenly slides downward along the second fixed plate 33, thereby knocking the filter unit 5, so that the aerosol particles passed by the filter unit 5 fall on the flip plate 11, and are thereby collected by the weighing and collecting mechanism 600.

[0141] like Figure 4 As shown, as another preferred embodiment of the present utility model, the induction limiting mechanism 500 includes:

[0142] A first fixing plate 26, wherein the first fixing plate 26 is fixed inside the housing 1;

[0143] A first guide slide bar 27, wherein the first guide slide bar 27 is slidably connected to the first fixed plate 26 and the constant flow pipe 2, and one end of the first guide slide bar 27 is located in the constant flow pipe 2 and opposite to the one-way flip flow blocking mechanism 100;

[0144] A first movable plate 28, wherein the first movable plate 28 is fixedly connected to the first guide slide bar 27;

[0145] a baffle 29, wherein the baffle 29 is fixed to one end of the first movable plate 28 close to the third rotating shaft 19;

[0146] A rotating rod 30, wherein the rotating rod 30 is fixed on the third rotating shaft 19 and is located on a side of the baffle plate 29 away from the one-way flip flow blocking mechanism 100;

[0147] A second elastic member 31, wherein the second elastic member 31 is sleeved on the first guide slide bar 27, and the second elastic member 31 is located between the first movable plate 28 and the first fixed plate 26;

[0148] The first positioning block 32 is fixed to an end of the first guide slide bar 27 away from the one-way flip blocking mechanism 100 .

[0149] In the embodiment of the utility model, when in use, the one-way flip blocking mechanism 100 puts the transparent part 3 in a flow state under the action of air pressure. At this time, the one-way flip blocking mechanism 100 squeezes the first guide slide bar 27 to move, and the first guide slide bar 27 drives the first movable plate 28 to move. The first movable plate 28 drives the baffle 29 to move to one side of the rotating rod 30, so that the rotating rod 30 cannot be flipped, thereby making the third rotating shaft 19 unable to rotate, thereby controlling the operation of the transmission mechanism 400. When the one-way flip blocking mechanism 100 causes the transparent part 3 to be converted from a flow state to a non-flow state, the first movable plate 28 and the first guide slide bar 27 are reset under the action of the elastic force of the second elastic member 31, and the rotating rod 30 can be rotated at this time to release the control of the transmission mechanism 400.

[0150] like Figure 5 As shown, as another preferred embodiment of the utility model, the weighing and collecting mechanism 600 includes:

[0151] A weighing shell 43, wherein the weighing shell 43 is fixed to one side of the chute 15;

[0152] A collecting shell 44, wherein the collecting shell 44 is in communication with the weighing shell 43;

[0153] A mounting seat 45, wherein the mounting seat 45 is horizontally disposed in the weighing shell 43 and the collecting shell 44;

[0154] A weighing device 46 , the weighing device 46 is fixed on the mounting base 45 , and the weighing device 46 is located below the chute 15 ; and

[0155] The flip support assembly is used to adjust the position of the mounting seat 45 .

[0156] In the embodiment of the utility model, when in use, aerosol particles fall on the weighing device 46, and their weight is measured by the weighing device 46 and compared with the light and shadow measurement unit, so as to obtain a more accurate aerosol particle size distribution result.

[0157] In one aspect of this embodiment, the flip support assembly includes:

[0158] A cylinder 49, wherein the cylinder 49 is mounted on the outer wall of the collecting shell 44;

[0159] A first support rod 47, wherein the first support rod 47 is connected to a bottom surface of one end of the mounting seat 45 through a first hinge frame;

[0160] A second support rod 48, the second support rod 48 is connected to the bottom surface of the other end of the mounting seat 45 through a second hinge frame, and the second support rod 48 is slidably connected to the weighing shell 43;

[0161] A connecting block 50, wherein the connecting block 50 is fixedly connected to an output end of the cylinder 49;

[0162] The connecting rod 51 has two ends hinged to the connecting block 50 and the second supporting rod 48 respectively.

[0163] When in use, by starting the cylinder 49, the cylinder 49 drives the connecting block 50 to move, and the connecting block 50 drives the connecting rod 51 to move, thereby driving the second support rod 48 to move, and the second support rod 48 drives the mounting seat 45 to flip through the second hinged frame, so that impurities fall into the collecting shell 44 and are collected, which is convenient for the next measurement of the aerosol particle size distribution.

[0164] The above embodiment of the utility model provides an aerosol particle size distribution measuring device, which is provided by setting a shell 1, a constant flow pipe 2, a transparent part 3, an air extraction unit 4, a filtering unit 5, a light and shadow measuring unit, a one-way flip flow blocking mechanism 100, a knocking mechanism 200, a power mechanism 300, a transmission mechanism 400, an inductive limiting mechanism 500 and a weighing and collecting mechanism 600. When in use, by controlling the operation of the air extraction unit 4, the air extraction unit 4 starts to extract air from the constant flow pipe 2, and the external airflow passes through the constant flow pipe 2 and is finally discharged through the air extraction unit 4. When the constant airflow passes through the transparent part 3, the light and shadow measuring unit can infer the diameter and particle size distribution of the particles by analyzing the intensity and angle of the scattered light. At this time, the air pressure makes the one-way flip flow blocking mechanism 100 in a starting state, the transparent part 3 is flowing, and the flow potential energy is converted into mechanical potential energy through the power mechanism 300. At this time, the inductive limiting mechanism 500 senses the one-way flip flow blocking mechanism 100 is in the starting state, that is, when the one-way reversing flow blocking mechanism 100 makes the transparent part 3 in the flow state, the inductive limiting mechanism 500 controls the transmission mechanism 400 and cannot drive the knocking mechanism 200 to operate. After the measurement is completed, that is, when the one-way reversing flow blocking mechanism 100 makes the transparent part 3 change from the flow state to the non-flow state, the inductive limiting mechanism 500 releases the control of 40, so that the transmission mechanism 400 uses the mechanical potential energy converted by the power mechanism 300 to drive the knocking mechanism 200 to operate, and the knocking mechanism 200 knocks on the filter unit 5, and the aerosol particles fall on the one-way reversing flow blocking mechanism 100, and are finally collected by the weighing and collecting mechanism 600, so that the device can filter aerosol particles and purify the air while measuring the aerosol particle size distribution, which is energy-saving and environmentally friendly, and can be verified by weighing and comparing with the results of the light and shadow measurement unit, so as to obtain more accurate results.

[0165] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An aerosol particle size distribution measuring device, characterized in that: include: case; A constant flow pipe, wherein the constant flow pipe is fixed on the housing; A transparent portion, the transparent portion being arranged at one end of the constant flow pipe; An air extraction unit, which is installed at the other end of the constant flow pipeline; A filter unit, wherein the filter unit is fixed to a side of the transparent portion close to the air extraction unit; A light and shadow measuring unit, the light and shadow measuring unit is used to measure the distribution of aerosol passing through the transparent portion; A one-way reversing flow blocking mechanism, which is arranged on a side of the filter unit close to the transparent portion and is used to control the flow state of the constant flow pipeline; A knocking mechanism, the knocking mechanism is used to knock the filter unit; A power mechanism, the power mechanism is used to convert flow potential energy into mechanical energy; A transmission mechanism, the transmission mechanism is used to connect the power mechanism and the knocking mechanism to enable the knocking mechanism to operate; An inductive limit mechanism, which is used to sense the operation of the one-way flip flow blocking mechanism, so as to limit the control of the knocking mechanism by the control transmission mechanism; The weighing and collecting mechanism is arranged on both sides of the one-way flip flow blocking mechanism, and is used to measure the weight of aerosol particles.

2. The aerosol particle size distribution measuring device according to claim 1, characterized in that: The one-way flip flow blocking mechanism comprises: Flip plates, the flip plates are symmetrically and tiltedly distributed, and the higher ends of the two flip plates are butted against each other; A first rotating shaft, the first rotating shaft is fixedly connected to a lower end of the flip plate, and the first rotating shaft is rotatably connected to the constant flow pipeline; A first elastic member, wherein the first elastic member is fixedly connected to the inner wall of the constant flow pipe and the bottom wall of the flip plate respectively; A guide sealing block, wherein the guide sealing block is fixed to a higher end of the flip plate; The constant flow pipe is provided with an inclined groove opposite to the top surface of the flip plate.

3. The aerosol particle size distribution measuring device according to claim 1, characterized in that: The knocking mechanism comprises: A second fixing plate, wherein the second fixing plate is fixed on the inner wall of the constant flow pipe; a second guide slide bar, the second guide slide bar being slidably connected to the second fixing plate; a second positioning block, the second positioning block being fixed to an end of the second guide slide bar away from the filter unit; An elastic support assembly, the elastic support assembly is used to elastically support the second guide slide bar; An intermittent pulling assembly is used to intermittently pull the second positioning block to move in a direction away from the filter unit.

4. The aerosol particle size distribution measuring device according to claim 3, characterized in that: The elastic support assembly comprises: a second movable plate, the second movable plate being fixed on the second guide sliding rod; a third elastic member, the third elastic member being sleeved on the second guide slide bar and being located between the second movable plate and the second fixed plate; A stopper is fixed on the second fixed plate and is opposite to the second movable plate.

5. The aerosol particle size distribution measuring device according to claim 3, characterized in that: The intermittent pulling assembly comprises: A rotating wheel, the rotating wheel is driven to rotate by a transmission mechanism; A pull rope, one end of which is fixedly connected to the second positioning block, and the other end of which is wound around the rotating wheel; A clamping slider, wherein the clamping slider is slidably disposed in the rotating wheel, and one end of the clamping slider is arc-shaped and partially embedded in the weighing and collecting mechanism; A fourth elastic member is fixedly connected to the inner wall of the rotating wheel and the bottom wall of the clamping sliding block respectively.

6. The aerosol particle size distribution measuring device according to claim 1, characterized in that: The power mechanism comprises: A transition shell, wherein the transition shell is fixedly connected to the constant flow pipeline; A second rotating shaft, the second rotating shaft is rotatably disposed in the transition shell and has two ends extending outside the transition shell; The fan blades are evenly fixed on the second rotating shaft and are opposite to the constant flow pipe.

7. The aerosol particle size distribution measuring device according to claim 2, characterized in that: The transmission mechanism comprises: a second cylindrical spur gear, the second cylindrical spur gear being driven to rotate by a power mechanism; A second gear rod, the second gear rod being meshedly connected with the second cylindrical spur gear; A trapezoidal slider, wherein the trapezoidal slider is fixedly connected to the lower end of the second gear rod; A first gear rod, wherein the first gear rod is slidably connected to the trapezoidal slider, and an inner wall of the first gear rod is fixedly connected to an end surface of the trapezoidal slider via a fourth elastic member; a third rotating shaft, the third rotating shaft being rotatably connected to the constant flow pipeline; A first cylindrical spur gear, which is mounted on the third rotating shaft and meshed with the first gear rod; A concave limiting frame is fixed to the lower end of the first gear rod, and the concave limiting frame is slidably connected to the inner wall of the shell through a connecting slider.

8. The aerosol particle size distribution measuring device according to claim 7, characterized in that: The induction limit mechanism comprises: a first fixing plate, wherein the first fixing plate is fixed in the housing; A first guide slide bar, wherein the first guide slide bar is slidably connected to the first fixed plate and the constant flow pipe, and one end of the first guide slide bar is located in the constant flow pipe and opposite to the one-way flip flow blocking mechanism; A first movable plate, wherein the first movable plate is fixedly connected to the first guide sliding rod; A baffle, the baffle being fixed to one end of the first movable plate close to the third rotating shaft; A rotating rod, the rotating rod is fixed on the third rotating shaft and is located on a side of the baffle away from the one-way flip flow blocking mechanism; a second elastic member, wherein the second elastic member is sleeved on the first guide slide bar, and the second elastic member is located between the first movable plate and the first fixed plate; A first positioning block is fixed to an end of the first guide slide bar away from the one-way flip flow blocking mechanism.

9. The aerosol particle size distribution measuring device according to claim 2, characterized in that: The weighing and collecting mechanism comprises: A weighing shell, wherein the weighing shell is fixed to one side of the chute; A collecting shell, the collecting shell being in communication with the weighing shell; A mounting seat, the mounting seat is horizontally arranged in the weighing shell and the collecting shell; A weighing device, the weighing device is fixed on the mounting base, and the weighing device is located below the chute; and A flip support assembly is used to adjust the position of the mounting seat.

10. The aerosol particle size distribution measuring device according to claim 9, characterized in that: The flip support assembly comprises: A cylinder, wherein the cylinder is mounted on the outer wall of the collecting shell; A first support rod, the first support rod is connected to a bottom surface of one end of the mounting seat through a first hinge frame; A second support rod, the second support rod is connected to the bottom surface of the other end of the mounting seat through a second hinge frame, and the second support rod is slidably connected to the weighing shell; A connecting block, the connecting block is fixedly connected to the output end of the cylinder; A connecting rod, both ends of which are hinged to the connecting block and the second supporting rod respectively.

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