Sampling device for chemical agent analysis

Abstract

The invention discloses a sampling device for chemical agent analysis. The sampling device comprises a sampling body, a rotating part, an extracting part, a piston part and a sampling head. The distance between the extraction piece and the rotating piece is adjusted, the pressing piece is pressed, gas in the pressing piece is kept to be exhausted, the sampling head is placed in a chemical reagent needing to be sucked, the chemical reagent is extracted through elastic force reset of the pressing piece which is pressed, the activity chamber is filled with the chemical reagent, and the sealing piece is floated to block the connecting hole. When the sampling device for chemical reagent analysis is used, the size of the area at the lower end of the piston piece is changed only by rotating the rotating piece, a worker can conveniently adjust the height of the liquid level needing to be extracted after rotating the rotating piece, quantitative sampling of a chemical reagent is achieved, operation is easy and convenient, use is convenient, the worker can be effectively helped to sample, and the sampling efficiency is improved. The sampling efficiency is improved.

Description

Technical Field

[0001] The invention relates to sampling technology, in particular to a sampling device for chemical agent analysis. Background Art

[0002] Chemical reagents are relative standard substances for chemical research and component analysis. They are an important condition for scientific and technological progress and are widely used in the synthesis, separation, qualitative and quantitative analysis of substances. They can be said to be the eyes of chemists. Chemical reagents are indispensable in the daily work of factories, schools, hospitals and research institutes. Sampling is to select representative samples from the target object.

[0003] Some chemical reagents need to be studied and sampled, and strict numerical characteristics are required for experiments. When adding chemical reagents, quantitative addition needs to be achieved. However, the current dropper is not convenient for quantitative absorption and quantitative dripping, which leads to excessive or insufficient addition of chemical reagents, affecting the normal progress of chemical experiments, and resulting in differences in the numerical values of later experiments. Summary of the invention

[0004] In order to solve the defects of the prior art mentioned above, the present invention proposes a sampling device for chemical agent analysis.

[0005] The technical solution of the present invention is achieved in this way:

[0006] A sampling device for chemical agent analysis, characterized in that it comprises:

[0007] A sampling body, wherein a sampling chamber is formed in the middle of the sampling body, a mounting hole is formed at the upper end of the sampling chamber, and a pressing piece is provided at the upper end of the sampling body;

[0008] A rotating member arranged in the mounting hole, wherein the rotating member is provided with a rotating portion, a plurality of mounting arms matched with the mounting hole and a rotating rod arranged in the middle of the mounting arms are arranged at the lower end of the rotating portion, and a first air passage is arranged in the middle of the rotating member;

[0009] An extraction member matched with the rotating member, the extraction member is connected with the rotating rod, an activity chamber is provided at the bottom of the extraction member, a second air channel matched with the first air channel is provided in the middle of the extraction member, the second air channel is connected to the activity chamber via a connecting hole, a sealing member arranged in the activity chamber is provided in the middle of the extraction member, when the activity chamber is filled with liquid, the sealing member is floated by the liquid, and the connecting hole is blocked by the sealing member;

[0010] A piston member matched with the extraction member, wherein the middle of the piston member forms a holding area matched with the extraction member, and the holding area is provided with a plurality of through holes connected with the activity chamber;

[0011] and a sampling head that cooperates with the lower end of the sampling body, a conical chamber with a lower opening is formed in the middle of the sampling head;

[0012] Rotate the rotating member to adjust the distance between the extracting member and the rotating member, exert pressure on the pressing member, keep the gas in the pressing member discharged, place the sampling head in the chemical reagent to be aspirated, and through the elastic reset of the pressing member itself when it is pressed, aspirate the chemical reagent. The chemical reagent fills the activity chamber and floats up the sealing member to block the connection hole.

[0013] In the present invention, an installation post is provided on the rotating member, the installation post is connected to the pressing member, and a first external thread is provided on the outer wall of the rotating rod of the rotating member.

[0014] In the present invention, the extracting member is composed of a moving rod and a fixed disk that cooperate with the rotating rod. The activity chamber is arranged in the middle of the fixed disk, the second air passage is in the middle of the moving rod, and a first internal thread that cooperates with the first external thread is provided in the second air passage.

[0015] In the present invention, a positioning protrusion is provided on the outer wall of the fixed disk, and a positioning ring groove that cooperates with the positioning protrusion is provided on the inner wall of the piston member.

[0016] In the present invention, the cross-section of the sealing member is fan-shaped, a triangular counterweight portion is formed at the lower end of the sealing member, the upper end is a hollow chamber, a spherical surface is provided at the upper end of the sealing member, and cutting surfaces are provided on both sides of the sealing member.

[0017] In the present invention, the width of the spherical surface is greater than the diameter of the connection hole.

[0018] In the present invention, a spherical inner wall is formed in the middle of the activity chamber, and the diameter of the spherical inner wall is greater than the diameter of the sealing member.

[0019] In the present invention, symmetrically arranged sliding grooves are provided on the inner wall of the sampling chamber, and sliding blocks that cooperate with the sliding grooves are provided on the outer wall of the piston member.

[0020] In the present invention, an inverted buckle portion is provided on the mounting arm, and a guiding inclined surface and a contact surface are provided on the inverted buckle portion.

[0021] In the present invention, a second external thread is provided on the sampling head, and a second internal thread that cooperates with the second external thread is provided at the lower end of the sampling body.

[0022] Implementing the sampling device for chemical reagent analysis of the present invention has the following beneficial effects: When using this sampling device for chemical reagent analysis, only the rotating member needs to be rotated, thereby changing the area size at the lower end of the piston member, facilitating the staff to adjust the liquid level height to be extracted after rotating the rotating member, achieving quantitative sampling of chemical reagents, with simple operation and convenient use, and can effectively assist the staff in sampling and improve the sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the sampling device for chemical reagent analysis of the present invention;

[0024] Figure 2 is Figure 1 the top view of;

[0025] Figure 3 is Figure 2 the sectional view taken along line A-A in;

[0026] Figure 4 is Figure 3 the partial enlarged view at B in;

[0027] Figure 5 is Figure 1 the exploded view of;

[0028] Figure 6 is Figure 5 the sectional view of the pressing member structure in;

[0029] Figure 7 is Figure 5 the sectional view of the rotating member structure in;

[0030] Figure 8 is Figure 7 the partial enlarged view at C in;

[0031] Figure 9 is Figure 5 the perspective view of the sampling body structure in;

[0032] Figure 10 is Figure 5 the sectional view of the extraction member structure in;

[0033] Figure 11 is Figure 10 the partial enlarged view at D in;

[0034] Figure 12 is Figure 5 the sectional view of the piston member structure in;

[0035] Figure 13 is Figure 5 the sectional view of the sealing member structure in;

[0036] Figure 14 It is a schematic diagram of another state of the extraction member, the sealing member and the piston member in the present invention.

[0037] In the figure: sampling body 1, rotating member 2, extraction member 3, piston member 4, sampling head 5, sampling chamber 6, mounting hole 7, pressing member 8, rotating part 9, mounting arm 10, rotating rod 11, first air channel 12, mounting column 13, first external thread 14, undercut part 15, guiding inclined surface 16, contact surface 17, hand-held part 18, upper inner wall surface 19, mounting sleeve 20, pressing bag 21, sleeve hole 22, pressing chamber 23, moving rod 24, fixed plate 25, movable chamber 26, second air channel 27, first internal thread 28, positioning protrusion 29, positioning ring groove 30, connecting hole 31, sealing member 32, triangular counterweight part 33, hollow chamber 34, spherical surface 35, cut surface 36, spherical inner wall 37, holding area 38, through hole 39, sliding groove 40, sliding block 41, tapered chamber 42, second external thread 43, second internal thread 44. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0039] Example 1

[0040] like Figures 1 to 14 As shown, the sampling device for chemical reagent analysis of the present invention comprises a sampling body 1, a rotating member 2, an extraction member 3, a piston member 4 and a sampling head 5. The sampling body 1 is used for the staff to grasp by hand, so as to facilitate the sampling of chemical reagents. The rotating member 2 is arranged at the upper end of the sampling body 1, and the lower end extends to the inner part of the sampling body 1. The extraction member 3 is arranged in the middle of the sampling body 1, and the upper end of the extraction member 3 is kept connected to the rotating member 2. By rotating the rotating member 2, the rotating member 2 can drive the extraction member 3 to move up and down, thereby expanding the area of the lower end of the extraction member 3. The piston member 4 is arranged at the lower end of the extraction member 3, and the sampling head 5 is installed at the lower end of the sampling body 1.

[0041] When the rotating member 2 drives the extraction member 3 to move upward, the area at the lower end of the extraction member 3 can be enlarged, so that more chemical reagents can be extracted. When the rotating member 2 drives the extraction member 3 to move downward, the area at the lower end of the extraction member 3 can be reduced, so that less chemical reagents can be extracted.

[0042] A sampling chamber 6 is formed in the middle of the sampling body 1. An installation hole 7 is formed at the upper end of the sampling chamber 6. The upper end of the sampling chamber 6 communicates with the outside through the installation hole 7. A pressing member 8 is provided at the upper end of the sampling body 1. The pressing member 8 is arranged on the rotating member 2. When pressure is maintained on the pressing member 8, the air inside the pressing member 8 can be compressed, so as to keep the pressing member 8 under compression force and generate elastic potential energy by itself. When the external force is cancelled, the shape of the pressing member 8 can be restored by the elastic potential energy of the pressing member 8 itself, so that the outside air fills the inside of the pressing member 8, and the extraction of chemical reagents can be realized.

[0043] Symmetrically arranged hand-held parts 18 are also provided on the sampling body 1, which are convenient for the staff to place their fingers.

[0044] The rotating member 2 is arranged in the installation hole 7. A rotating part 9 is provided on the rotating member 2. A plurality of installation arms 10 cooperating with the installation hole 7 and a rotating rod 11 arranged in the middle of the installation arms 10 are provided at the lower end of the rotating part 9. The diameter of the rotating part 9 is larger than the diameter of the installation hole 7. A first air passage 12 is provided in the middle of the rotating member 2. An installation column 13 is provided on the rotating member 2. The installation column 13 is connected to the pressing member 8. A first external thread 14 is provided on the outer wall of the rotating rod 11 of the rotating member 2.

[0045] At the same time, an inverted buckle part 15 is provided on the installation arm 10. A guiding inclined surface 16 and a contact surface 17 are provided on the inverted buckle part 15. The outer diameter of the installation arm 10 cooperates with the inner diameter of the installation hole 7. By the cooperation of the guiding inclined surface 16 on the inverted buckle part 15 and the outer edge of the installation hole 7, the guiding of the inverted buckle part 15 is realized, so that the installation arm 10 deforms under force and moves towards the center line of the installation hole 7, keeping the inverted buckle part 15 moving into the installation hole 7, so that the contact surface 17 contacts the upper inner wall surface 19 of the sampling chamber 6, restricting the position of the rotating member 2.

[0046] Although the installation hole 7 restricts the position of the rotating member 2, it only restricts the rotating member 2 from moving up and down and left and right, but it can still rotate freely.

[0047] The pressing member 8 is composed of an installation sleeve 20 and a pressing bladder 21. A sleeve hole 22 is formed in the middle of the installation sleeve 20. A pressing chamber 23 is formed in the middle of the pressing bladder 21. The sleeve hole 22 communicates with the pressing chamber 23. The pressing member 8 is made of rubber material and has a certain elasticity. After being pressed and the external force is cancelled, it can return to its original shape. The sleeve hole 22 is arranged on the installation column 13 of the rotating member 2. The sleeve hole 22 is sleeved on the installation column 13 under force, so that it can deform, thus maintaining the sealing performance and installation stability.

[0048] The extraction member 3 cooperates with the rotating member 2, and the extraction member 3 is connected to the rotating rod 11. The extraction member 3 is composed of a moving rod 24 and a fixed disk 25 that cooperate with the rotating rod 11. An active chamber 26 is provided at the bottom of the extraction member 3, and the active chamber 26 is arranged in the middle of the fixed disk 25. The second air duct 27 is in the middle of the moving rod 24, and a first internal thread 28 that cooperates with the first external thread 14 is provided in the second air duct 27.

[0049] A positioning protrusion 29 is provided on the outer wall of the fixed plate 25, and a positioning annular groove 30 is provided on the inner wall of the piston member 4 to cooperate with the positioning protrusion 29. The piston member 4 is mounted on the fixed plate 25 by the cooperation between the positioning protrusion 29 and the positioning annular groove 30, so that the piston member 4 will not fall off the fixed plate 25.

[0050] A second air duct 27 cooperating with the first air duct 12 is provided in the middle of the extraction member 3. The second air duct 27 is connected to the active chamber 26 via a connecting hole 31. When the rotating member 2 and the extraction member 3 are connected via the first external thread 14 and the first internal thread 28, the first air duct 12 and the second air duct 27 are connected, thereby realizing the connection between the first air duct 12, the second air duct 27 and the pressing chamber 23.

[0051] A sealing member 32 disposed in the movable chamber 26 is provided in the middle of the extraction member 3. When the movable chamber 26 is filled with liquid, the sealing member 32 is floated by the liquid and the connecting hole 31 is blocked by the sealing member 32. The cross section of the sealing member 32 is arranged in a fan-shaped manner, and a triangular counterweight portion 33 is formed at the lower end of the sealing member 32, and a hollow chamber 34 is formed at the upper end. A spherical surface 35 is provided at the upper end of the sealing member 32, and cut surfaces 36 are provided on both sides of the sealing member 32. The width of the spherical surface 35 is greater than the diameter of the connecting hole 31. A spherical inner wall 37 is formed in the middle of the movable chamber 26, and the diameter of the spherical inner wall 37 is greater than the diameter of the sealing member 32.

[0052] Example 2

[0053] When installing the seal 32, first place the seal 32 in the movable chamber 26, and then connect the piston 4 to the fixed plate 25. Since the diameter of the seal 32 is smaller than the diameter of the movable chamber 26, the seal 32 can be kept in any position in the movable chamber 26. However, since the seal 32 has a triangular weight portion 33, when there is no liquid in the movable chamber 26, the state of the seal 32 at this time is as follows: Figure 14 As shown in FIG. 1 , a cut surface 36 of the sealing member 32 will be kept in contact with the piston member 4. When the active chamber 26 is filled with liquid, since there is a hollow chamber 34 in the middle of the sealing member 32, the sealing member 32 will be Figure 4In the state shown, when the chemical reagent slowly fills the activity chamber 26, the spherical inner wall 37 can guide the spherical surface 35 on the seal 32 to gradually stand upright. As the liquid level continues to rise, the seal 32 is maintained in the connection hole 31. Under the buoyancy of the chemical reagent, the seal 32 is restricted within the connection hole 31 by the force, so that the spherical surface 35 on the seal 32 contacts the spherical inner wall 37 of the activity chamber 26, and the spherical surface 35 extends into the connection hole 31 to block the connection hole 31, thereby preventing the chemical reagent from entering the second air duct 27.

[0054] The piston member 4 cooperates with the extraction member 3. A holding area 38 for fitting and installing with the extraction member 3 is formed in the middle of the piston member 4. Multiple through holes 39 communicating with the activity chamber 26 are provided in the holding area 38. To keep the piston member 4 moving up and down, symmetrically arranged sliding grooves 40 are provided on the inner wall of the sampling chamber 6, and sliding blocks 41 cooperating with the sliding grooves 40 are provided on the outer wall of the piston member 4. When the rotating member 2 rotates, the first internal thread 28 can be kept rotating in cooperation with the first external thread 14. Since the position of the rotating member 2 remains unchanged, and the extraction member 3 is connected to the piston member 4, and sliding blocks 41 are provided on the piston member 4, and sliding grooves 40 are provided on the inner wall of the sampling chamber 6, the rotation of the sliding blocks 41 is restricted, and the piston member 4 can only move up and down, thereby changing the size of the area at the lower end of the piston member 4, facilitating the staff to adjust the liquid level to be extracted after rotating the rotating member 2, realizing quantitative sampling of the chemical reagent, with simple operation and convenient use, and being able to effectively assist the staff in sampling and improving the sampling efficiency.

[0055] The sampling head 5 cooperates with the lower end of the sampling body 1. A conical chamber 42 with an opening at the lower end is formed in the middle of the sampling head 5. A second external thread 43 is provided on the sampling head 5, and a second internal thread 44 cooperating with the second external thread 43 is provided at the lower end of the sampling body 1.

[0056] The sampling head 5 and the sampling body 1 are made of transparent materials for easy observation. Scale lines are provided on the sampling head 5 and the sampling body 1. Since the inside of the sampling head 5 is conically arranged, and the activity chamber 26 is formed in the fixed disk 25, and multiple through holes 39 are formed in the middle of the piston member 4, the sizes of these spaces are calculated together, so that the scale lines can be accurately marked to ensure that the size of the extracted sample meets the national standard.

[0057] When sampling is required, first rotate the rotating member 2 to adjust the distance between the extraction member 3 and the rotating member 2, observe whether the bottom surface of the piston member 4 coincides with the corresponding scale line, then apply pressure to the pressing member 8 to keep the gas in the pressing member 8 discharged, place the sampling head 5 in the chemical reagent to be aspirated, and through the elastic reset of the pressing member 8 itself when being pressed, aspirate the chemical reagent. The chemical reagent fills the activity chamber 26 and floats up the seal 32 to block the connection hole 31.

[0058] If the volume of the pressing chamber 23 before compression is H1, and the volume after compression is H2, H1 - H2 = H3, and H3 is the volume of the air squeezed out. After the piston member 4 is pulled upward, a suction space is formed at the lower end of the piston member 4. The maximum volume of the suction space is H4, and H3 > H4. It only needs to press the pressing member 8 once to fill H4, and at the same time, the pressing member 8 does not return to its original shape, and the inside of the pressing member 8 is in a state of lack of air, so that the atmospheric pressure inside the pressing member 8 is less than the atmospheric pressure outside, so that the chemical reagent in the sampling body 1 is sucked by the pressing member 8, which is convenient for transferring the sampled chemical reagent without spilling.

[0059] When discharging the chemical reagent in the sampling body 1, only need to press the pressing member 8, so that the gas in the pressing member 8 pushes the sealing member 32 and pushes out the chemical reagent in the sampling body 1.

[0060] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sampling device for chemical reagent analysis, characterized in that, include: A sampling body, wherein a sampling chamber is formed in the middle of the sampling body, a mounting hole is formed at the upper end of the sampling chamber, and a pressing piece is provided at the upper end of the sampling body; A rotating member arranged in the mounting hole, wherein the rotating member is provided with a rotating portion, a plurality of mounting arms matched with the mounting hole and a rotating rod arranged in the middle of the mounting arms are arranged at the lower end of the rotating portion, and a first air passage is arranged in the middle of the rotating member; An extraction member matched with the rotating member, the extraction member is connected with the rotating rod, an activity chamber is provided at the bottom of the extraction member, a second air channel matched with the first air channel is provided in the middle of the extraction member, the second air channel is connected with the activity chamber via a connecting hole, a sealing member arranged in the activity chamber is provided in the middle of the extraction member, when the activity chamber is filled with liquid, the sealing member floats up through the liquid, and the connecting hole is blocked by the sealing member; a piston member matched with the extraction member, a holding area matched with the extraction member is formed in the middle of the piston member, and a plurality of through holes connected with the activity chamber are provided in the holding area; and a sampling head matched with the lower end of the sampling body, wherein a conical chamber with a hole at the lower end is formed in the middle of the sampling head; the rotating part is rotated, the distance between the extraction part and the rotating part is adjusted, pressure is applied to the pressing part, the gas in the pressing part is kept discharged, the sampling head is placed in the chemical reagent to be absorbed, the pressing part is reset by the elastic force of the pressing part itself, the chemical reagent is extracted, the chemical reagent fills the active chamber, and the sealing part is floated to seal the connecting hole.

2. The sampling device for chemical agent analysis according to claim 1, wherein The rotating member is provided with a mounting column, the mounting column is connected to the pressing member, and the outer wall of the rotating rod of the rotating member is provided with a first external thread.

3. The sampling device for chemical agent analysis according to claim 2, wherein The extraction member is composed of a moving rod and a fixed disk matched with a rotating rod, the activity chamber is arranged in the middle of the fixed disk, the second air channel is in the middle of the moving rod, and a first internal thread matched with a first external thread is arranged in the second air channel.

4. The sampling device for chemical agent analysis according to claim 3, characterized in that, A positioning protrusion is arranged on the outer wall of the fixed disk, and a positioning ring groove matched with the positioning protrusion is arranged on the inner wall of the piston member.

5. The sampling device for chemical agent analysis according to claim 1, characterized in that, The cross section of the seal is fan-shaped, the lower end of the seal is maintained to form a triangular counterweight portion, the upper end is a hollow chamber, the upper end of the seal is provided with a spherical surface, and both sides of the seal are provided with cut surfaces.

6. The sampling device for chemical agent analysis according to claim 5, characterized in that, The width of the spherical surface is greater than the diameter of the connecting hole.

7. The sampling device for chemical agent analysis according to claim 6, wherein, A spherical inner wall is formed in the middle of the activity chamber, and the diameter of the spherical inner wall is greater than the diameter of the sealing element.

8. The sampling device for chemical agent analysis according to claim 1, characterized in that, The inner wall of the sampling chamber is provided with symmetrically arranged sliding grooves, and the outer wall of the piston is provided with sliding blocks matched with the sliding grooves.

9. The sampling device for chemical agent analysis according to claim 1, wherein, An undercut portion is provided on the mounting arm, and a guiding inclined surface and a contact surface are provided on the undercut portion.

10. The sampling device for chemical agent analysis according to claim 1, characterized in that, The sampling head is provided with a second external thread, and the lower end of the sampling body is provided with a second internal thread matching with the second external thread.

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