CN215262677U

CN215262677U - Automatic sampling device of inhalable particles

Info

Publication number: CN215262677U
Application number: CN202120864201.1U
Authority: CN
Inventors: 刘学万; 张玲
Original assignee: Wuhan Zhongke Mapping Technology Co ltd
Current assignee: Wuhan Zhongke Mapping Technology Co ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-12-21
Anticipated expiration: 2031-04-25

Abstract

The utility model discloses an automatic sampling device of inhalable particulate matter, it includes cylinder and awl barrel, the cylinder has top cap and lower extreme opening, be equipped with first and second drum in the cylinder, the interval forms whirlwind dedusting cavity between cylinder and the first drum, the interval forms the air inlet chamber between the first second drum, the through-hole that corresponds with the second drum is seted up at the center of top cap, can dismantle in the through-hole and be connected with sealed lid, sealed bottom surface fixedly connected with stretches into the impact dust removal subassembly of second drum inner chamber, the cylinder lateral wall is close to the top cap and is equipped with the air-supply line, second drum lateral wall is close to top cap department and is equipped with the fresh air inlet, the awl barrel can be dismantled and connect in the lower extreme department of cylinder, be equipped with out the chimney in the awl barrel, be equipped with the collection subassembly in the play chimney. The device has the advantages that the dust-containing gas is subjected to primary cyclone dust removal and primary impact adsorption treatment in sequence before the inhalable particles are collected, so that large particles are removed, and the final sampling is more accurate.

Description

Automatic sampling device of inhalable particles

Technical Field

The utility model belongs to the air quality detection field, concretely relates to automatic sampling device of inhalable particulate matter.

Background

Total suspended particulate refers to the collective term for solid and liquid particulates floating in air, and has a particle size in the range of about 0.1 to 100 microns. Some particles may be visible to the naked eye due to large particle size or black color, such as smoke. Some are so small as to be observable using an electron microscope. Particulate matter having a particle size of less than 10 microns is commonly referred to as inhalable particulate matter, also known as PM 10.

The inhalable particles are in ambient air for a long time and have great influence on human health and atmospheric visibility. Typically from motor vehicles traveling on unpaved asphalt, cement pavements, the process of crushing and grinding materials, and dust being blown up by wind. After being inhaled by people, the inhalable particles can be accumulated in a respiratory system, cause a plurality of diseases and have great harm to human beings. When the air quality is detected, the content of inhalable particles is an important index; the particles with larger particle size in the total suspended particles are strong in inertia force due to self weight, and are adsorbed by the primary filter membrane when settling under the cyclone effect or impacting on the trapping plate for the first time, most of the large particles can be separated under the two effects, but the effect is usually poor in one-time separation, a small amount of large particles can still be seen during subsequent sampling of inhalable particles, and finally the detection result of the inhalable particles is higher and the accuracy is poor; in addition, the existing sampling equipment has the defects of inconvenient taking and placing of the filter membrane, poor adjustability and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an inhalable particle automatic sampling device aims at overcoming the above-mentioned not enough that exists among the prior art.

The utility model provides an above-mentioned technical problem's technical scheme as follows: an automatic sampling device for inhalable particles comprises a cylinder body and a cone body, wherein the cylinder body is provided with a top cover and an opening at the lower end, a first cylinder and a second cylinder are coaxially arranged in the cylinder body, the lower ends of the first cylinder and the second cylinder are both opened, the top ends of the first cylinder and the second cylinder are both fixedly connected with the top cover, a cyclone dust removal cavity is formed between the cylinder body and the first cylinder at intervals, an air inlet cavity is formed between the first cylinder and the second cylinder at intervals, a through hole corresponding to the second cylinder is formed in the center of the top cover, a sealing cover is detachably connected in the through hole, an impact dust removal assembly extending into the inner cavity of the second cylinder is fixedly connected to the bottom surface of the sealing cover, an air inlet pipe for feeding air to the cyclone dust removal cavity along the tangential direction is arranged on the side wall of the cylinder body close to the top cover, and an air inlet hole for communicating the air inlet cavity with the inner cavity of the second cylinder is arranged on the side wall of the second cylinder close to the top cover, the upper end of the air outlet cylinder is connected with the lower end of the cylinder in a detachable mode, the upper end face of the air outlet cylinder is in butt joint with the lower end face of the second cylinder, the lower end of the air outlet cylinder penetrates through the cone body and is communicated with the outside, and a collecting assembly used for absorbing and collecting inhalable particles is arranged in the air outlet cylinder.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, strike dust removal subassembly includes connecting rod, air inlet plate, catches dish and first filter membrane, the vertical setting of connecting rod and upper end with the central fixed connection in bottom surface of sealed lid, the lower extreme of connecting rod runs through in proper order from last to down the center of air inlet plate and catching dish just the air inlet plate with connecting rod fixed connection, the lower extreme threaded connection of connecting rod has adjusting nut, catch the dish with the lower surface of connecting rod sliding connection and catching dish compress tightly in adjusting nut's upper surface, the equipartition has first gas pocket on the air inlet plate, catch on the dish equipartition have with the second gas pocket that first gas pocket staggers and distributes, first filter membrane lay in catch on the dish and set up with the exhaust hole of second gas pocket one-to-one.

The adoption of the further scheme has the advantages that the structure is compact, the distance between the air inlet disc and the collecting disc can be properly adjusted by rotating the adjusting nut, and a better impact dust removal effect can be obtained; after the adjusting nut is detached from the connecting rod, the whole trapping disc can be detached, so that the first filter membrane on the trapping disc can be replaced conveniently; the whole impact dust-flushing component is detachably connected with the top cover, so that the impact dust-flushing component is convenient to replace, clean and maintain.

Furthermore, the peripheries of the air inlet disc and the catching disc are attached to the inner wall of the second cylinder in a sealing manner and can slide relatively.

The adoption of the further scheme has the beneficial effects that the whole impact dust removal assembly is ensured to be easy to slide upwards and further be drawn out from the through hole; the peripheries of the air inlet disc and the catch disc may be provided with rubber rings for sealing, so that the whole resembles a piston.

Furthermore, a plurality of ejector pins are connected to the surface, close to the periphery, of the air inlet disc at uniform intervals in a threaded manner, the ejector pins are vertically arranged, and the lower ends of the ejector pins penetrate through the air inlet disc and can be abutted against and tightly press the first filter membrane on the collecting disc below the air inlet disc.

Adopt above-mentioned further scheme's beneficial effect to be, support tightly spacing from the top to the entrapment dish on the one hand, on the other hand first filter membrane is supported tightly and is pushed down the back and can guarantee better impact dust removal effect.

Furthermore, the sealing cover is in threaded connection with the through hole, and a rotating handle is fixedly arranged on the top surface of the sealing cover.

Adopt above-mentioned further scheme's beneficial effect be, convenient to detach and installation.

Furthermore, the collection assembly comprises a support screen plate arranged in the air outlet cylinder and a second filter membrane arranged on the support screen plate.

Adopt above-mentioned further scheme's beneficial effect to be, simple structure, the second filter membrane is placed and is taken off all more conveniently.

Furthermore, both ends all are equipped with the flanging about the cylinder, the top cap with the upper end the flanging passes through hand screw fixed connection, the awl barrel butt be equipped with the flanging and with cylinder lower extreme flanging passes through hand screw fixed connection.

Adopt above-mentioned further scheme's beneficial effect be, easily manual dismouting, need not rely on the instrument.

Further, the air outlet cylinder is a vertical cylinder.

Adopt above-mentioned further scheme's beneficial effect to be, the air-out is more smooth and easy, reduces the resistance.

Compared with the prior art, the utility model discloses a technological effect and advantage:

the automatic sampling device for inhalable particles provided by the utility model sequentially carries out primary cyclone dust removal and primary impact adsorption treatment on large particles in total suspended particles in the air, thereby ensuring that the inhalable particles are not influenced by the large particles when finally sampling, and the sampling is more accurate; whole device is package assembly, and each essential element all can be dismantled, makes things convenient for laying and taking of filter membrane, but the interval of entrapment board and air inlet dish is properly adjusted simultaneously, and the suitability is better.

Drawings

Fig. 1 is a sectional view of an automatic sampling device for inhalable particles according to the present invention;

FIG. 2 is an enlarged schematic view of the impingement dust removal assembly in the second cylinder of FIG. 1;

fig. 3 is a top view of the automatic inhalable particulate sampling device shown in fig. 1.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a cylinder; 2. a conical cylinder body; 3. a top cover; 4. a first cylinder; 5. a second cylinder; 6. a sealing cover; 7. an air inlet pipe; 8. an air inlet hole; 9. an air outlet cylinder; 10. a connecting rod; 11. an air inlet disc; 12. a catch tray; 13. a first filter membrane; 14. adjusting the nut; 15. a first air hole; 16. a second air hole; 17. a thimble; 18. rotating the handle; 19. supporting the screen plate; 20. a second filter membrane; 21. and screwing the screw by hand.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, if terms indicating orientation such as "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc. are used, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 3, the utility model provides an inhalable particle automatic sampling device, which comprises a cylinder body 1 and a cone body 2, wherein the cylinder body 1 is provided with a top cover 3 and an opening at the lower end, a first cylinder 4 and a second cylinder 5 are coaxially arranged in the cylinder body 1, the lower ends of the first cylinder 4 and the second cylinder 5 are both opened and the top ends thereof are both fixedly connected with the top cover 3, a cyclone dedusting cavity is formed between the cylinder body 1 and the first cylinder 4 at intervals, an air inlet cavity is formed between the first cylinder 4 and the second cylinder 5 at intervals, a through hole corresponding to the second cylinder 5 is arranged at the center of the top cover 3, a sealing cover 6 is detachably connected in the through hole, the bottom surface of the sealing cover 6 is fixedly connected with an impact dedusting component extending into the inner cavity of the second cylinder 5, an air inlet pipe 7 for feeding air to the cyclone dedusting cavity along the tangential direction is arranged on the side wall of the cylinder body 1 near the top cover 3, an air inlet hole 8 communicated with the air inlet cavity and the inner cavity of the second cylinder 5 is formed in the position, close to the top cover 3, of the side wall of the second cylinder 5, the thick end of the cone body 2 is upwards detachably connected to the lower end of the cylinder body 1, an air outlet cylinder 9 is arranged in the cone body 2, the upper end face of the air outlet cylinder 9 is in butt joint with the lower end face of the second cylinder 5 and is sealed, the lower end of the air outlet cylinder 9 penetrates through the cone body 2 to be communicated with the outside, and a collecting assembly used for absorbing and collecting inhalable particles is arranged in the air outlet cylinder 9. The outlet 9 is preferably a vertical cylinder.

It should be noted that, during sampling, dust-containing gas enters from the air inlet pipe (can be pumped into or the lower end of the air outlet pipe is connected with an exhaust fan to form negative pressure in the cylinder body so as to suck the dust-containing gas), the dust-containing gas enters the cylinder body at a certain flow velocity along the tangential direction, then spirally descends to form cyclone, heavy large particles deposit at the bottom of the cone body under the action of the cyclone, the dust-containing gas with large particles preliminarily removed enters the air inlet cavity from the lower end of the first cylinder, flows upwards and enters the second cylinder through the air inlet hole in the upper end of the cylinder wall of the second cylinder, and then is acted by the impact dust removal assembly, the large particles can be adsorbed and fixed to remove when impacting the filter membrane by using large particle inertia, after two continuous actions, the air flow basically only containing inhalable particles flows to the air outlet pipe, and is filtered and adsorbed and removed by the second filter membrane in the air outlet pipe, so that the dust-containing particles can be sampled smoothly and accurately sampled.

In one embodiment of the present invention, as shown in fig. 1 and 2, the impact dust removal assembly includes a connecting rod 10, an air inlet disc 11, a catch disc 12 and a first filter membrane 13, the connecting rod 10 is vertically arranged and the upper end thereof is fixedly connected with the center of the bottom surface of the sealing cover 6, the lower end of the connecting rod 10 penetrates through the centers of the air inlet disc 11 and the trapping disc 12 from top to bottom in sequence, the air inlet disc 11 is fixedly connected with the connecting rod 10, an adjusting nut 14 is connected to the lower end of the connecting rod 10 through a thread, the catching disc 12 is connected with the connecting rod 10 in a sliding mode, the lower surface of the catching disc 12 is pressed on the upper surface of the adjusting nut 14, first air holes 15 are uniformly distributed on the air inlet disc 11, second air holes 16 which are distributed in a staggered way with the first air holes 15 are uniformly distributed on the catching disc 12, the first filter membrane 13 is laid on the catch tray 12 and is provided with exhaust holes corresponding to the second air holes 16 one by one.

On the basis of the above embodiment, the peripheries of the air inlet disc 11 and the catch disc 12 are in close sealing contact with the inner wall of the second cylinder 5 and can slide relatively.

On the basis of the above embodiment, a plurality of ejector pins 17 are uniformly and spirally connected to the surface of the air inlet plate 11 near the periphery at intervals, the ejector pins 17 are vertically arranged, and the lower ends of the ejector pins 17 penetrate through the air inlet plate 11 and then can be abutted against and press the first filter membrane 13 on the collecting plate 12 below.

In the above embodiments, the sealing cover 6 is screwed in the through hole, and a rotating handle 18 is fixed on the top surface of the sealing cover 6.

In an embodiment of the present invention, the collecting assembly comprises a supporting screen 19 disposed in the air outlet cylinder 9 and a second filter membrane 20 disposed on the supporting screen 19.

It should be noted that the collection assembly may also only include the second filter membrane, and at this time, the periphery of the second filter membrane is clamped between the upper end of the air outlet cylinder and the lower end of the second cylinder; the supporting net plate can be a hollow plate, a grid plate or a steel wire filter screen.

In an embodiment of the present invention, the upper and lower ends of the cylinder 1 are both provided with a flanging, the top cover 3 is fixedly connected with the upper end of the flanging by a hand screw 21, the thick end of the cone body 2 is provided with a flanging and is fixedly connected with the flanging at the lower end of the cylinder 1 by the hand screw 21.

It can be understood that besides the way of fixing and connecting the hand screw, the quick-release mechanism connected between the existing cover body and the barrel can be considered.

The basic principle of the utility model is as follows: after the dusty gas enters the cylinder body along the tangential direction at a certain flow velocity through the air inlet pipe, the cyclone is formed by spiral descending, heavy large particles are deposited at the bottom of the cone body under the cyclone action, the most large-particle sharp impurities are preliminarily removed, then the dusty gas enters the air inlet cavity from the lower end of the first cylinder, the dusty gas flows upwards and enters the second cylinder through the air inlet holes (a plurality of large-particle sharp impurities can be uniformly arranged at intervals in the circumferential direction) in the upper end of the cylinder wall of the second cylinder, and then the dusty gas is acted by the impact dust removal assembly, the large-particle large-inertia can be adsorbed and fixed by the principle that the large particles can be adsorbed and fixed when impacting the filter membrane, after continuous twice action, the airflow basically only containing inhalable particles flows to the air outlet pipe, and is adsorbed and removed by the second filter membrane in the air outlet pipe, so that smooth and accurate sampling can be realized.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. An automatic sampling device for inhalable particles is characterized by comprising a cylinder body (1) and a cone body (2), wherein the cylinder body (1) is provided with a top cover (3) and an opening at the lower end, a first cylinder (4) and a second cylinder (5) are coaxially arranged in the cylinder body (1), the lower ends of the first cylinder (4) and the second cylinder (5) are both opened, the top ends of the first cylinder (4) and the second cylinder (5) are both fixedly connected with the top cover (3), a cyclone dust removal cavity is formed between the cylinder body (1) and the first cylinder (4) at intervals, an air inlet cavity is formed between the first cylinder (4) and the second cylinder (5) at intervals, a through hole corresponding to the second cylinder (5) is formed in the center of the top cover (3), a sealing cover (6) is detachably connected in the through hole, and an impact dust removal component extending into the inner cavity of the second cylinder (5) is fixedly connected to the bottom surface of the sealing cover (6), an air inlet pipe (7) for supplying air to the cyclone dust removal cavity along the tangential direction is arranged at the position, close to the top cover (3), of the side wall of the cylinder body (1), an air inlet hole (8) for communicating the air inlet cavity with the inner cavity of the second cylinder (5) is formed in the position, close to the top cover (3), of the side wall of the second cylinder (5), the thick end of the cone body (2) is upwards detachably connected to the lower end of the cylinder body (1), an air outlet cylinder (9) is arranged in the cone body (2), the upper end face of the air outlet cylinder (9) is in butt joint sealing with the lower end face of the second cylinder (5), the lower end of the air outlet cylinder (9) penetrates through the cone body (2) to be communicated with the outside, and an acquisition assembly for absorbing and acquiring inhalable particles is arranged in the air outlet cylinder (9).

2. The automatic sampling device for inhalable particles according to claim 1, wherein the impact dust-removing assembly comprises a connecting rod (10), an air inlet disc (11), a trapping disc (12) and a first filter membrane (13), the connecting rod (10) is vertically arranged, the upper end of the connecting rod is fixedly connected with the center of the bottom surface of the sealing cover (6), the lower end of the connecting rod (10) sequentially penetrates through the centers of the air inlet disc (11) and the trapping disc (12) from top to bottom, the air inlet disc (11) is fixedly connected with the connecting rod (10), the lower end of the connecting rod (10) is in threaded connection with an adjusting nut (14), the trapping disc (12) is in sliding connection with the connecting rod (10), the lower surface of the trapping disc (12) is tightly pressed on the upper surface of the adjusting nut (14), and first air holes (15) are uniformly distributed on the air inlet disc (11), second air holes (16) which are distributed in a staggered mode with the first air holes (15) are uniformly distributed in the catching disc (12), and the first filter membrane (13) is laid on the catching disc (12) and is provided with exhaust holes which correspond to the second air holes (16) one by one.

3. An automatic sampling device of inhalable particles according to claim 2, characterised in that the perimeter of the air inlet disc (11) and the catch disc (12) are sealed in abutment with the inner wall of the second cylinder (5) and can slide with respect thereto.

4. The automatic sampling device for inhalable particles according to claim 2, characterized in that a plurality of ejector pins (17) are screwed on the disk surface of the air inlet disk (11) close to the periphery at regular intervals, the ejector pins (17) are vertically arranged, and the lower ends of the ejector pins can be pressed against the first filter membrane (13) on the lower capture disk (12) after penetrating through the air inlet disk (11).

5. An automatic sampling device for inhalable particles according to claim 2, characterised in that said sealing cap (6) is screwed in said through hole, a rotating handle (18) being fixed on the top surface of said sealing cap (6).

6. The automatic sampling device for inhalable particles according to claim 1, characterized in that said collection assembly comprises a support screen (19) placed inside said chimney (9) and a second filter (20) placed on said support screen (19).

7. The automatic sampling device for inhalable particles according to claim 1, characterized in that the upper and lower ends of the cylinder (1) are provided with flanging edges, the top cover (3) is fixedly connected with the flanging edge at the upper end through a hand screw (21), the thick end of the cone body (2) is provided with a flanging edge and is fixedly connected with the flanging edge at the lower end of the cylinder (1) through the hand screw (21).

8. The automatic sampling device of inhalable particles according to any of the claims 1 to 7, characterized in that said chimney (9) is a vertical cylinder.