CN212780129U - Quantitative sampling device for detecting superfine dry powder - Google Patents

Abstract

The utility model relates to a dry powder detects technical field, and discloses a quantitative sampling device of superfine dry powder detection usefulness, including the sample post, the top fixedly connected with limiting plate of sample post, the columnar order groove has been seted up on the right side of sample post, the cylindricality chamber that the equidistance was arranged is seted up to the inside of sample post, the right side intercommunication of cylindricality chamber bottom has the connecting hole, the right side and the columnar order groove of connecting hole are linked together, the inside rotation in columnar order groove is connected with movable post. The utility model discloses a, thereby through the dry powder space of depositing of the lift control cylindricality chamber of rotating the movable stopper of slip tube control, the vacuum pump can absorb external dry powder and pack cylindricality chamber, rotates closing and opening that the movable post just can the control connection hole, can reach quantitative sampling's purpose, and different degree of depth levels's dry powder can be sampled to not co-altitude cylindricality chamber, can once only sample different degree of depth levels's dry powder, can make things convenient for the staff to use.

Description

Quantitative sampling device for detecting superfine dry powder

Technical Field

The utility model relates to a dry powder detects technical field, specifically is a quantitative sampling device that superfine dry powder detected usefulness.

Background

For a dry powder fire extinguisher, the superfine dry powder has small grain diameter, good fluidity, good anti-complex flame retardance, dispersivity and electrical insulation and good fire extinguishing effect, the superfine dry powder needs to be detected after being stirred, mixed, ground and screened, and the sampling equipment is generally used for sampling the superfine dry powder in a container.

Present superfine dry powder sampling device can only once only take a sample once, be located the dry powder of container, the dry powder quality of different degree of depth levels is also different, this needs the measurement personnel sample many times, bring inconvenience for work, sampling device can not quantitative sample also can reduce sampling device's practicality, problem to the aforesaid provides, technical personnel in the field provide a quantitative sampling device that superfine dry powder detected the usefulness, the utility model discloses, possess the advantage that can carry out quantitative sample to the dry powder of the different degree of depth, the problem that dry powder sampling device can not quantitative sample and need carry out different degree of depth level samples many times has been solved.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a quantitative sampling device of superfine dry powder detection usefulness possesses can carry out advantages such as quantitative sample to the dry powder of the different degree of depth, has solved dry powder sampling device can not quantitative sample and need carry out the problem of different degree of depth level sampling many times.

(II) technical scheme

For the above-mentioned purpose that can carry out the ration sample to the dry powder of the different degree of depth of realization, the utility model provides a following technical scheme: the utility model provides a quantitative sampling device that superfine dry powder detected usefulness, includes the sample post, the top fixedly connected with limiting plate of sample post, the cylindrical groove has been seted up on the right side of sample post, the cylindricality chamber that the equidistance was arranged is seted up to the inside of sample post, the right side intercommunication of cylindrical cavity bottom has the connecting hole, the right side and the cylindrical groove of connecting hole are linked together, the inside rotation in cylindrical groove is connected with movable post, the through-hole that the equidistance was arranged is seted up to the outside of activity post, through-hole and connecting hole looks adaptation, the top of activity post is run through and is rotated and be connected to the top of limiting plate, the threaded hole is seted up to the inside of sample post, the screw hole is located the below of cylindrical cavity, the inside threaded connection thread piece of screw hole, the top fixedly connected with slide tube of thread piece, the, A set of cylindricality chamber, sample post and limiting plate and extend to the top of limiting plate, the outward appearance of slip pipe respectively with sample post and limiting plate sliding connection, the inside sliding connection in cylindricality chamber has the activity to fill in, activity stopper fixed connection is in the outside of slip pipe, the bleeder vent that the equidistance was arranged is seted up in the outside left side of slip pipe, the bleeder vent is located the below of activity stopper, the inside fixedly connected with filter cloth of bleeder vent, the left side fixed mounting at limiting plate top has the vacuum pump, the input fixedly connected with of vacuum pump rather than the connecting pipe that is linked together, the one end that the vacuum pump was kept away from to the connecting pipe runs through the sample post and extends to the inside of screw hole, the one end that the connecting pipe is located the screw hole runs through the inboard.

Preferably, the top of the movable column is fixedly connected with a first handle, the top of the sliding tube is fixedly connected with a second handle, and anti-skid grains are arranged outside the first handle and the second handle.

Preferably, the sliding connection part of the sampling column and the sliding pipe is provided with a first sealing ring, the outer side of the first sealing ring is fixedly connected with the sampling column, and the inner side of the first sealing ring is contacted with the sliding pipe.

Preferably, the outer part of the movable plug is fixedly connected with sealing rubber, and the outer side of the sealing rubber is in contact with the inner wall of the cylindrical cavity.

Preferably, the sliding connection part of the thread block and the connecting pipe is fixedly connected with a second sealing ring, the outer side of the second sealing ring is fixedly connected with the thread block, and the inner side of the second sealing ring is connected with the connecting pipe in a sliding manner.

Preferably, the bearing fixedly connected with the inner bottom wall of the cylindrical groove is embedded into the inner bottom wall of the cylindrical groove, the inner ring of the bearing is fixedly connected with the movable column, the rubber sleeve fixedly connected with the movable column is sleeved on the outer portion of the movable column, and the two ends of the through hole penetrate through and extend to the outer side of the rubber sleeve.

Preferably, the outside fixed mounting of connecting pipe has the valve, the valve is located the top of limiting plate, the bottom fixedly connected with conical head of sample post.

Preferably, the top of first handle and second handle all scribbles the pointer mark, the top of limiting plate scribbles the scale, the scale is located the second handle under and is annular distribution.

(III) advantageous effects

Compared with the prior art, the utility model provides a quantitative sampling device of superfine dry powder detection usefulness possesses following beneficial effect:

1. the quantitative sampling device for detecting the superfine dry powder can drive the sliding pipe to move upwards or downwards by rotating the sliding pipe, the threaded block at the bottom of the sliding pipe rotates in the threaded hole, the movable plug can also move up and down in the cylindrical cavity, the movable plug moves downwards to reduce the space of the part below the cylindrical cavity, the amount of the sampled dry powder is reduced, the amount of the sampled dry powder can be increased by the upward movement of the movable plug, the movable plug rotates ninety degrees, the through hole can be staggered with the connecting hole to prevent the dry powder from entering the connecting hole, the sampling column is placed in a container needing to sample the dry powder, the sampling column is inserted into the dry powder, the movable column rotates again for ninety degrees, the through hole can correspond to the connecting hole, the vacuum pump is started to extract the air in the sliding pipe and extract the gas in the cylindrical cavity through the air holes, and the external dry powder is absorbed into the cylindrical cavity through the, the inside of the cylindrical cavity is filled with dry powder, the movable column is rotated ninety degrees, the through hole is staggered with the connecting hole, the connecting hole is blocked, the vacuum pump is closed to take out the sampling column, the cylindrical cavities with different heights can sample the dry powder with different depths, the filter cloth can prevent the dry powder from entering the inner side of the sliding tube, the communication relation between the bottom of the sliding tube and the connecting tube is not influenced by the lifting of the sliding tube, the utility model controls the lifting of the movable plug by rotating the sliding tube so as to control the dry powder storage space of the cylindrical cavity, the vacuum pump can absorb the external dry powder to fill the cylindrical cavity, the movable column can be rotated to control the closing and opening of the connecting hole, the purpose of quantitative sampling can be achieved, the cylindrical cavities with different heights can sample the dry powder with different depth levels, and the quantitative sampling can be realized, and the dry powder of different depth levels can be sampled at one time, so that the sampling device is convenient for workers to use.

2. This quantitative sampling device of superfine dry powder detection usefulness can make things convenient for hand to rotate the movable column through first handle, and the through-hole of being convenient for corresponds and staggers with the connecting hole, and the second handle can make things convenient for hand to rotate the slip tube and make it go up and down, and anti-skidding line can increase the coefficient of friction between hand and the handle, makes the hand be difficult to drop from two handles.

3. This quantitative sampling device of superfine dry powder detection usefulness, through the gap between first sealing washer can sealed sliding tube and the sample post, avoid in dry powder in a cylindrical cavity leaks another cylindrical cavity space, avoid causing the confusion of each degree of depth level sample.

4. This quantitative sampling device of superfine dry powder detection usefulness can seal the gap between activity stopper and the cylindricality chamber through sealing rubber, guarantees its sealed effect all the time when making the activity stopper can the up-and-down motion, can guarantee that the vacuum pump inhales the cylindricality intracavity with the dry powder.

5. This quantitative sampling device of superfine dry powder detection usefulness, through the second sealing washer of embedding on the screw thread piece, in screw thread piece up-and-down motion, also can guarantee the leakproofness of intercommunication between connecting pipe and the sliding tube, avoid connecting pipe and sliding tube leakproofness not to cause the negative pressure that the cylindricality intracavity formed not enough, lead to the dry powder to be difficult to get into the cylindricality chamber.

6. This quantitative sampling device of superfine dry powder detection usefulness can conveniently move the rotation of post through the bearing, conveniently controls the first handle and rotates ninety degrees of activity post, and the rubber sleeve can increase the sealed effect of connecting hole, and when connecting hole and through-hole stagger, the connecting hole right side can be sealed by the rubber sleeve, reaches the purpose of blockking up the connecting hole.

7. This quantitative sampling device of superfine dry powder detection usefulness can be convenient for close the connecting pipe through the valve, avoids gas reflux to the cylindricality intracavity, and the resistance when the shape of conical head can reduce to insert makes things convenient for the sample post to insert in the dry powder.

8. This superfine dry powder detects quantitative sampling device of usefulness, through pointer mark can give first handle and second handle pivoted time have one to refer to the thing, make things convenient for the rotation of two handles of perception, the scale can conveniently know the ascending height with the decline of activity stopper, because of when rotating the second handle, the screw thread piece is invariable ascending or descends.

Drawings

FIG. 1 is a schematic front sectional view of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A of FIG. 1 according to the present invention;

FIG. 3 is an enlarged schematic view of the structure of FIG. 1 at B according to the present invention;

FIG. 4 is a schematic top sectional view of the movable column of the present invention;

FIG. 5 is a schematic top view of the cross-sectional structure of the filter cloth of the present invention;

fig. 6 is a schematic view of the second handle and the scale showing the position relationship in the top view.

In the figure: 1. a sampling column; 2. a limiting plate; 3. a cylindrical groove; 4. a cylindrical cavity; 5. connecting holes; 6. a movable post; 7. a through hole; 8. a threaded hole; 9. a thread block; 10. a sliding tube; 11. a movable plug; 12. air holes are formed; 13. a filter cloth; 14. a vacuum pump; 15. a connecting pipe; 16. a first handle; 17. a second handle; 18. a first seal ring; 19. sealing rubber; 20. a second seal ring; 21. a bearing; 22. a rubber sleeve; 23. a valve; 24. a conical head; 25. marking a pointer; 26. a graduated scale.

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.

Referring to fig. 1-6, a quantitative sampling device for detecting ultrafine dry powder comprises a sampling column 1, a limiting plate 2 is fixedly connected to the top of the sampling column 1, a cylindrical groove 3 is formed in the right side of the sampling column 1, cylindrical cavities 4 arranged at equal intervals are formed in the sampling column 1, a connecting hole 5 is communicated with the right side of the bottom of each cylindrical cavity 4, the right side of the connecting hole 5 is communicated with the cylindrical groove 3, a movable column 6 is rotatably connected to the inside of the cylindrical groove 3, through holes 7 arranged at equal intervals are formed in the outside of the movable column 6, the through holes 7 are matched with the connecting hole 5, the top end of the movable column 6 penetrates through and is rotatably connected to the top of the limiting plate 2, a threaded hole 8 is formed in the sampling column 1, the threaded hole 8 is located below the cylindrical cavity 4, a threaded block 9 is connected to the internal threads of the threaded hole 8, a sliding tube 10 is fixedly connected to the top of the, A group of cylindrical cavities 4, a sampling column 1 and a limit plate 2 extend to the top of the limit plate 2, the outer surface of a sliding tube 10 is respectively connected with the sampling column 1 and the limit plate 2 in a sliding way, the inside of the cylindrical cavity 4 is connected with a movable plug 11 in a sliding way, the movable plug 11 is fixedly connected with the outside of the sliding tube 10, the left side of the outside of the sliding tube 10 is provided with air holes 12 which are arranged at equal intervals, the air holes 12 are positioned below the movable plug 11, the inside of the air holes 12 is fixedly connected with a filter cloth 13, the left side of the top of the limit plate 2 is fixedly provided with a vacuum pump 14, the input end of the vacuum pump 14 is fixedly connected with a connecting tube 15 which is communicated with the vacuum pump 14, one end of the connecting tube 15, which is far away from the vacuum pump 14, penetrates through the sampling column 1 and extends to, the thread block 9 at the bottom of the sliding pipe 10 rotates in the threaded hole 8, the sliding pipe 10 can be driven to move upwards or downwards, the movable plug 11 can also move up and down in the cylindrical cavity 4, the movable plug 11 moves downwards to reduce the space at the lower part of the cylindrical cavity 4, the amount of sampled dry powder is reduced, the movable plug 11 moves upwards to increase the amount of sampled dry powder, the movable column 6 rotates ninety degrees, the through hole 7 can stagger with the connecting hole 5, the dry powder is prevented from entering the connecting hole 5, the sampling column 1 is placed in a container needing to sample the dry powder, the sampling column 1 is inserted into the dry powder, the movable column 6 rotates again for ninety degrees, the through hole 7 corresponds to the connecting hole 5, the vacuum pump 14 is started, the air in the sliding pipe 10 is extracted through the connecting pipe 15, the air in the cylindrical cavity 4 is extracted through the air holes 12, the external dry powder is sucked into the cylindrical cavity 4 through the through hole, the inside of a cylindrical cavity 4 is filled with dry powder, a movable column 6 is rotated for ninety degrees, a through hole 7 is staggered with a connecting hole 5, the connecting hole 5 is blocked, a vacuum pump 14 is closed to take out a sampling column 1, the cylindrical cavities 4 with different heights can sample the dry powder with different depths, a filter cloth 13 can prevent the dry powder from entering the inner side of a sliding tube 10, the lifting of the sliding tube 10 does not influence the communication relation between the bottom of the sliding tube and a connecting pipe 15, the utility model discloses a space for storing the dry powder of the cylindrical cavity 4 is controlled by rotating the sliding tube 10 to control the lifting of a movable plug 11, the vacuum pump 14 can absorb the external dry powder to fill the cylindrical cavity 4, the movable column 6 is rotated to control the closing and opening of the connecting hole 5, the purpose of quantitative sampling can be achieved, the cylindrical cavities 4 with different heights can sample the dry powder of different levels, the quantitative sampling can be realized, can be convenient for the staff to use.

Further, the first handle 16 of top fixedly connected with of activity post 6, the top fixedly connected with second handle 17 of sliding tube 10, anti-skidding line has all been seted up to first handle 16 and second handle 17's outside, can make things convenient for hand to rotate activity post 6 through first handle 16, the through-hole 7 and the connecting hole 5 of being convenient for correspond and stagger, second handle 17 can make things convenient for hand to rotate sliding tube 10 and make it go up and down, anti-skidding line can increase the coefficient of friction between hand and the handle, make the hand be difficult to drop from two handles.

Further, the sliding connection department of sample post 1 and slip pipe 10 all is equipped with first sealing washer 18, the outside and the sample post 1 fixed connection of first sealing washer 18, the inboard and the slip pipe 10 contact of first sealing washer 18, can seal the gap between slip pipe 10 and the sample post 1 through first sealing washer 18, avoid in dry powder in a cylindrical cavity 4 leaks another cylindrical cavity 4 space, avoid causing the confusion of each degree of depth level sample.

Further, the outside fixedly connected with sealing rubber 19 of activity stopper 11, the outside of sealing rubber 19 and the inner wall contact in cylindricality chamber 4 can seal the gap between activity stopper 11 and the cylindricality chamber 4 through sealing rubber 19, guarantees its sealed effect all the time when making activity stopper 11 can the up-and-down motion, can guarantee that vacuum pump 14 inhales the dry powder in the cylindricality chamber 4.

Further, the sliding connection department fixedly connected with second sealing washer 20 of screw block 9 and connecting pipe 15, the outside and the screw block 9 fixed connection of second sealing washer 20, the inboard and the connecting pipe 15 sliding connection of second sealing washer 20, through the second sealing washer 20 of embedding on the screw block 9, in the time of screw block 9 up-and-down motion, also can guarantee the leakproofness of intercommunication between connecting pipe 15 and the slip pipe 10, avoid connecting pipe 15 and slip pipe 10 leakproofness not to make the not enough negative pressure chamber that forms in the cylindrical cavity 4, lead to the dry powder to be difficult to get into cylindrical cavity 4.

Further, it has rather than fixed connection's bearing 21 to imbed on the interior diapire in cylindrical groove 3, bearing 21's inner circle and the 6 fixed connection of activity post, the outside cover of activity post 6 is equipped with rather than fixed connection's rubber sleeve 22, the both ends of through-hole 7 all run through and extend to the outside of rubber sleeve 22, can make things convenient for the rotation of activity post 6 through bearing 21, conveniently control first handle 16 and rotate the ninety degrees of activity post 6, rubber sleeve 22 can increase the sealed effect of connecting hole 5, when connecting hole 5 staggers with through-hole 7, connecting hole 5 right side can be sealed by rubber sleeve 22, reach the purpose of blockking up connecting hole 5.

Further, the outside fixed mounting of connecting pipe 15 has valve 23, and valve 23 is located limiting plate 2's top, and the bottom fixedly connected with conical head 24 of sample post 1 can be convenient for close connecting pipe 15 through valve 23, avoids gaseous reflux to cylindrical cavity 4 in, and the resistance when inserting can be reduced to conical head 24's shape, makes things convenient for sample post 1 to insert in the dry powder.

Further, pointer mark 25 has all been scribbled at the top of first handle 16 and second handle 17, limiting plate 2's top scribbles scale 26, scale 26 is located second handle 17 under and is the annular distribution, there is a reference object when can giving first handle 16 and second handle 17 pivoted through pointer mark 25, the rotation of two handles of convenient perception, scale 26 can conveniently know the ascending height with the decline of activity stopper 11, when rotating second handle 17, thread block 9 is invariable ascending or descends.

It should be noted that the utility model using the vacuum pump 14 can be the PYP528, and other electric elements can be the same as the utility model, and the electric elements are provided with the control switch matched with the electric elements, and the installation position of the control switch can be selected according to actual requirements, and the description is different.

The working principle is as follows: drive sliding tube 10 through rotating second handle 17, the screw thread piece 9 of sliding tube 10 bottom is at 8 rotations in the screw hole, can drive sliding tube 10 and upwards or move down, activity stopper 11 also can be at the inside up-and-down motion in cylindricality chamber 4, activity stopper 11 moves down then the space of cylindricality chamber 4 lower part diminishes, the volume of sample dry powder just becomes few, activity stopper 11 moves up then the volume of sample dry powder can become many, can know the volume that activity stopper 11 specifically rises or descend compared to scale 26, rotate first handle 16 ninety degrees and drive movable column 6 and rotate, through-hole 7 will stagger with connecting hole 5, avoid dry powder to get into connecting hole 5, put into the container that needs sample dry powder with sampling column 1, cone 24 can make things convenient for sampling column 1 to insert in the dry powder, rotate movable column 6 ninety degrees once more, through-hole 7 corresponds with connecting hole 5, open vacuum pump 14, extract sliding tube 10 inside air and extract the inside gas of cylindricality chamber 4 through bleeder vent 12 through connecting pipe 15 And the external dry powder is sucked into the cylindrical cavity 4 through the through hole 7 and the connecting hole 5, the cylindrical cavity 4 is filled with the dry powder, the first handle 16 is rotated to rotate the movable column 6 by ninety degrees, the through hole 7 is staggered with the connecting hole 5, the connecting hole 5 is blocked, the vacuum pump 14 and the valve 23 are closed, the sampling column 1 is taken out, the cylindrical cavities 4 with different heights can sample the dry powder with different depths, the filter cloth 13 can prevent the dry powder from entering the inner side of the sliding tube 10, the bottom of the sliding tube 10 slides outside the connecting tube 15, the communication relation between the bottom of the sliding tube 10 and the connecting tube 15 is not influenced, the utility model discloses, the lifting of the movable plug 11 is controlled by rotating the sliding tube 10 so as to control the dry powder storage space of the cylindrical cavity 4, the vacuum pump 14 can suck the external dry powder to fill the cylindrical cavity 4, the movable column 6 can control the closing and opening of the connecting hole 5, different high cylindrical cavity 4 can sample the dry powder of different degree of depth levels, can the ration sampling, and once only can sample the dry powder of different degree of depth levels, can make things convenient for the staff to use.

It should be noted that each device in the present application is a common device in the market, and can be selected according to the requirement when in specific use, and the circuit connection relationship of each device all belongs to a simple series and parallel connection circuit, and there is no innovation point in the circuit connection, and those skilled in the art can easily implement the circuit connection, and belong to the prior art, and are not described again.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides a quantitative sampling device of superfine dry powder detection usefulness, includes sampling column (1), its characterized in that: the top of the sampling column (1) is fixedly connected with a limiting plate (2), a column-shaped groove (3) is formed in the right side of the sampling column (1), column-shaped grooves (4) which are arranged equidistantly are formed in the sampling column (1), a connecting hole (5) is communicated with the right side of the bottom of the column-shaped groove (4), the right side of the connecting hole (5) is communicated with the column-shaped groove (3), a movable column (6) is rotatably connected to the inside of the column-shaped groove (3), through holes (7) which are arranged equidistantly are formed in the outside of the movable column (6), the through holes (7) are matched with the connecting hole (5), the top end of the movable column (6) penetrates through and is rotatably connected to the top of the limiting plate (2), a threaded hole (8) is formed in the sampling column (1), the threaded hole (8) is located below the column-shaped groove (4), and a threaded block (9) is connected with the, the top fixedly connected with slip pipe (10) of screw thread piece (9), the top of slip pipe (10) runs through screw hole (8), a set of columnar cavity (4), sample post (1) and limiting plate (2) in proper order and extends to the top of limiting plate (2), the surface of slip pipe (10) respectively with sample post (1) and limiting plate (2) sliding connection, the inside sliding connection of columnar cavity (4) has movable stopper (11), movable stopper (11) fixed connection is in the outside of slip pipe (10), bleeder vent (12) that the equidistance was arranged are seted up to the outside left side of slip pipe (10), bleeder vent (12) are located the below of movable stopper (11), the inside fixedly connected with filter cloth (13) of bleeder vent (12), the left side fixed mounting at limiting plate (2) top has vacuum pump (14), the utility model discloses a sampling column, including vacuum pump (14), connecting pipe (15) that the input fixedly connected with of vacuum pump (14) is linked together rather than, the one end that vacuum pump (14) were kept away from in connecting pipe (15) runs through sampling column (1) and extends to the inside of screw hole (8), connecting pipe (15) are located one end through thread piece (9) of screw hole (8) and sliding connection to the inboard of sliding tube (10).

2. The quantitative sampling device for the detection of the ultrafine dry powder according to claim 1, wherein: the top fixedly connected with first handle (16) of activity post (6), the top fixedly connected with second handle (17) of slip pipe (10), anti-skidding line has all been seted up to the outside of first handle (16) and second handle (17).

3. The quantitative sampling device for the detection of the ultrafine dry powder according to claim 1, wherein: the sampling column is characterized in that a first sealing ring (18) is arranged at the sliding connection position of the sampling column (1) and the sliding pipe (10), the outer side of the first sealing ring (18) is fixedly connected with the sampling column (1), and the inner side of the first sealing ring (18) is in contact with the sliding pipe (10).

4. The quantitative sampling device for the detection of the ultrafine dry powder according to claim 1, wherein: the outer part of the movable plug (11) is fixedly connected with sealing rubber (19), and the outer side of the sealing rubber (19) is in contact with the inner wall of the cylindrical cavity (4).

5. The quantitative sampling device for the detection of the ultrafine dry powder according to claim 1, wherein: the sliding connection part of the thread block (9) and the connecting pipe (15) is fixedly connected with a second sealing ring (20), the outer side of the second sealing ring (20) is fixedly connected with the thread block (9), and the inner side of the second sealing ring (20) is connected with the connecting pipe (15) in a sliding mode.

6. The quantitative sampling device for the detection of the ultrafine dry powder according to claim 1, wherein: the embedded bearing (21) rather than fixed connection on the interior diapire in cylindric groove (3), the inner circle and the activity post (6) fixed connection of bearing (21), the outside cover of activity post (6) is equipped with rather than fixed connection's rubber sleeve (22), the both ends of through-hole (7) all run through and extend to the outside of rubber sleeve (22).

7. The quantitative sampling device for the detection of the ultrafine dry powder according to claim 1, wherein: the outside fixed mounting of connecting pipe (15) has valve (23), valve (23) are located the top of limiting plate (2), the bottom fixedly connected with conical head (24) of sample post (1).

8. The quantitative sampling device for the detection of the ultrafine dry powder according to claim 2, wherein: the top of first handle (16) and second handle (17) all scribbles pointer mark (25), the top of limiting plate (2) scribbles scale (26), scale (26) are located second handle (17) under and be annular distribution.

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