Quantitative sampling device

Abstract

The utility model discloses a quantitative sampling device which comprises a main body structure, the main body structure comprises a sampling barrel, a top cover mounted at the top end of the sampling barrel in a threaded manner and a bottom cover mounted at the lower end of the sampling barrel in a threaded manner, scale marks for quantitative sampling are arranged on the outer wall of the sampling barrel, and a suction head for sucking a sample is inserted into the bottom of the bottom cover; comprising a suction structure arranged in the sampling barrel; the suction structure comprises a piston block and a driving screw rod, the piston block is arranged in the sampling barrel in a sliding and sealing manner, the driving screw rod is rotationally mounted at the top of the piston block, the driving screw rod is mounted in the center of the top cover in a threaded manner, and a rocker arm for rotating the driving screw rod is mounted on the connecting block. By arranging the scale marks and driving the piston block in a hand-cranking mode, the suction head sucks or extrudes samples quantitatively, suction or extrusion is smooth and stable, and the problem that the samples are too much or too little is not prone to occurring.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling equipment, in particular to a quantitative sampling device. Background Art

[0002] Pit and fissure sealants, also known as anti-caries coatings, are a new type of oral medical polymer material developed in the 1960s. When applied to the pits and fissures on the tooth surface, they form a barrier after solidification, which can effectively seal the pits and fissures and isolate the caries-causing factors in the oral environment from invading the teeth, thereby preventing the occurrence of caries. Its advent has opened up a new way to prevent caries in oral preventive medicine.

[0003] After the production of the pit and fissure sealant is completed, sampling and testing are required to ensure that the product has good quality. After searching, the Chinese patent application number is: CN202111215082.8. A liquid sampling device is provided, which includes a sampling cup and a sampling barrel. The lower end of the sampling cup is provided with an interface, and a guide column is passed through the sampling cup. The guide column can move up and down in the sampling cup. A retaining ring matching the interface is provided on the guide column. The middle part of the guide column is provided with a first exhaust hole, and the outer wall of the guide column near the upper end is provided with a second exhaust hole connected to the first exhaust hole. The upper end of the guide column is provided with a limit block, and a lifting ring is connected to the limit block. The lifting ring is provided with a traction rope; the sampling barrel is used to collect sewage from the sampling cup, and the sampling barrel is provided with an inlet matching the interface gap. The liquid sampling device of the invention has a simple structure, is easy to process and manufacture, is easy to use, has a good sampling effect, and can collect liquid samples in different environmental conditions, including sampling in deeper sewage wells with biogas where personnel cannot go down, which greatly improves the wide range and can be beneficial to the health of users.

[0004] The above technical solutions and traditional sampling equipment lack the function of quantitative sampling, and are prone to over-sampling or under-sampling. Over-sampling will lead to product waste, while under-sampling will require multiple samplings, increasing the workload. In addition, the integrity of the sampling equipment makes it difficult to clean the inside after a single sampling, which will cause inaccurate data in subsequent sampling and testing work. Therefore, we need to propose a quantitative sampling device. Utility Model Content

[0005] The purpose of the utility model is to provide a quantitative sampling device. The device has a simple structure and is easy to use. By setting scale lines and manually driving a piston block, the pipette head can quantitatively inhale or extrude samples. Whether inhaling or extruding, the device is relatively smooth and stable, and it is not easy to have the problem of over-sampling or under-sampling. The device has high practical value and can solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A quantitative sampling device comprises a main structure;

[0008] The main structure includes a sampling tube, a top cover threadedly mounted on the top of the sampling tube, and a bottom cover threadedly mounted on the bottom of the sampling tube. The outer wall of the sampling tube is provided with scale lines for quantitative sampling, and the bottom of the bottom cover is plugged with a suction head for sucking samples.

[0009] It includes a suction structure disposed in the sampling cylinder;

[0010] The suction structure includes a piston block and a driving screw, wherein the piston block is arranged in a sliding seal inside the sampling tube, the driving screw is rotatably installed on the top of the piston block, the driving screw is threadedly installed at the center position of the top cover, and a connecting block is arranged at the upper end of the driving screw, and a rocker arm for rotating the driving screw is installed on the connecting block.

[0011] Preferably, a sealing ring is sleeved on the outside of the piston block, a bearing is embedded in the top center of the piston block, and the lower end of the driving screw is plugged and fixed to the inner ring of the bearing.

[0012] Preferably, a first threaded sleeve is integrally formed at the upper end of the sampling barrel, and a second threaded groove is provided on the inner wall of the lower end of the sampling barrel.

[0013] Preferably, a first thread groove is provided on the inner wall of the lower end of the top cover, and the first thread groove is matched with the first thread sleeve.

[0014] Preferably, a second threaded sleeve is integrally formed on the top of the bottom cover, and the second threaded groove is matched with the second threaded sleeve.

[0015] Preferably, a straw connected to the inner cavity of the sampling tube is provided at the bottom center of the bottom cover, a rubber sleeve is bonded to the outer wall of the straw, a plug-in portion is provided at the upper end of the suction head, and the straw is sealably plugged into the inside of the plug-in portion.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model is provided with a main structure including a sampling tube, a top cover and a bottom cover. The outer wall of the sampling tube is provided with scale lines. A driving screw is threadedly installed on the top cover. A piston block is rotatably installed at the lower end of the driving screw. The upper end of the driving screw is connected to a rocker arm through a connecting block. The bottom of the bottom cover is plugged with a suction head. The device has a simple structure and is easy to use. The suction head can quantitatively inhale or extrude samples by setting scale lines and manually driving the piston block. Whether inhaling or extruding, it is relatively smooth and stable, and it is not easy to have the problem of over-sampling or under-sampling. It has high practical value.

[0018] 2. The top cover is installed by threading and sealing at the top of the sampling tube, the bottom cover is installed by threading and sealing at the lower end of the sampling tube, and the suction head at the bottom of the bottom cover is used in combination by plugging. The sampling tube, top cover, bottom cover and suction head of the device can be quickly and conveniently combined and disassembled. After a single sampling is completed, the equipment can be disassembled for more comprehensive cleaning, which is convenient for subsequent use and avoids adverse effects on subsequent sampling and detection work, thereby improving the accuracy of detection data. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the sampling tube of the utility model;

[0021] Figure 3 It is a schematic diagram of the structure of the top cover of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the bottom cover of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the suction head of the utility model.

[0024] In the figure: 1. sampling tube; 2. top cover; 3. bottom cover; 4. scale line; 5. driving screw; 6. piston block; 7. suction head; 8. bearing; 9. connecting block; 10. rocker arm; 11. first threaded sleeve; 12. first thread groove; 13. second thread groove; 14. second threaded sleeve; 15. suction tube; 16. rubber sleeve; 17. plug-in part; 18. sealing ring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-5 , the utility model provides a technical solution:

[0027] A quantitative sampling device comprises a main structure;

[0028] The main structure includes a sampling tube 1, a top cover 2 threadedly installed on the top of the sampling tube 1 and a bottom cover 3 threadedly installed on the lower end of the sampling tube 1. The outer wall of the sampling tube 1 is provided with scale lines 4 for quantitative sampling, and the bottom of the bottom cover 3 is plugged with a suction head 7 for sucking samples; the outer part of the piston block 6 is sleeved with a sealing ring 18, and a bearing 8 is embedded in the top center of the piston block 6, and the lower end of the driving screw 5 is plugged and fixed to the inner ring of the bearing 8.

[0029] It includes a suction structure arranged in the sampling tube 1;

[0030] The suction structure includes a piston block 6 and a driving screw 5. The piston block 6 is arranged in a sliding seal inside the sampling tube 1. The driving screw 5 is rotatably installed on the top of the piston block 6. The driving screw 5 is threadedly installed at the center position of the top cover 2. A connecting block 9 is arranged at the upper end of the driving screw 5, and a rocker arm 10 for rotating the driving screw 5 is installed on the connecting block 9.

[0031] The utility model is provided with a main structure including a sampling tube 1, a top cover 2 and a bottom cover 3. The outer wall of the sampling tube 1 is provided with scale lines 4. A driving screw 5 is threadedly installed on the top cover 2. A piston block 6 is rotatably installed at the lower end of the driving screw 5. The upper end of the driving screw 5 is connected to a rocker arm 10 through a connecting block 9. A suction head 7 is plugged into the bottom of the bottom cover 3. The device has a simple structure and is easy to use. The suction head 7 is quantitatively inhaled or extruded by setting the scale lines 4 and manually driving the piston block 6. Whether inhaling or extruding, it is relatively smooth and stable, and it is not easy to have the problem of excessive or insufficient sampling. The device has high practical value.

[0032] During specific use, the various components of the equipment (sampling tube 1, top cover 2, bottom cover 3 and suction head 7) are assembled and their sealing is ensured, the suction head 7 is inserted into the product to be tested, the rocker arm 10 is rotated, and the piston block 6 slides on the inner wall of the sampling tube 1 to absorb the sample, and the purpose of quantitative sampling is achieved through slow extraction and scale line 4.

[0033] See also Figure 2-5 :

[0034] The upper end of the sampling tube 1 is integrally formed with a first threaded sleeve 11, and the inner wall of the lower end of the sampling tube 1 is provided with a second threaded groove 13. The inner wall of the lower end of the top cover 2 is provided with a first threaded groove 12, and the first threaded groove 12 and the first threaded sleeve 11 are adapted. The top of the bottom cover 3 is integrally formed with a second threaded sleeve 14, and the second threaded groove 13 and the second threaded sleeve 14 are adapted. A straw 15 connected to the inner cavity of the sampling tube 1 is provided at the bottom center of the bottom cover 3, and a rubber sleeve 16 is bonded to the outer wall of the straw 15. A plug-in portion 17 is provided at the upper end of the suction head 7, and the straw 15 is sealed and plugged into the inside of the plug-in portion 17.

[0035] By threading and sealing the top cover 2 at the top of the sampling tube 1, threading and sealing the bottom cover 3 at the lower end of the sampling tube 1, and the suction head 7 at the bottom of the bottom cover 3 being used in combination by plugging, the sampling tube 1, the top cover 2, the bottom cover 3 and the suction head 7 of the device can be quickly and conveniently combined and disassembled. After a single sampling is completed, the equipment can be disassembled for more comprehensive cleaning, which is convenient for subsequent use and avoids adverse effects on subsequent sampling and detection work, thereby improving the accuracy of detection data.

[0036] At the same time, a rubber sleeve 16 is arranged outside the straw 15. During the connection process between the suction head 7 and the straw 15, the rubber sleeve 16 can increase the tightness of the connection on the one hand, and improve the sealing of the connection on the other hand to avoid leakage of the sample.

[0037] The sampling tube 1 and the top cover 2 and the bottom cover 3 are all threadedly sealed. Specifically, a rubber gasket can be added at the connection to improve the sealing performance of the connection.

[0038] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A quantitative sampling device, characterized in that: Including the main structure; The main structure comprises a sampling tube (1), a top cover (2) threadedly mounted on the top of the sampling tube (1), and a bottom cover (3) threadedly mounted on the lower end of the sampling tube (1), wherein a suction head (7) for sucking samples is plugged into the bottom of the bottom cover (3); It comprises a suction structure arranged in the sampling tube (1); The suction structure comprises a piston block (6) and a driving screw (5), wherein the piston block (6) is arranged in a sliding seal inside the sampling tube (1), the driving screw (5) is rotatably mounted on the top of the piston block (6), the driving screw (5) is threadedly mounted at the center position of the top cover (2), and a connecting block (9) is arranged at the upper end of the driving screw (5), and a rocker arm (10) for rotating the driving screw (5) is installed on the connecting block (9).

2. A quantitative sampling device according to claim 1, characterized in that: The piston block (6) is sleeved with a sealing ring (18) on its exterior, a bearing (8) is embedded at the top center of the piston block (6), and the lower end of the driving screw (5) is plugged and fixed to the inner ring of the bearing (8).

3. A quantitative sampling device according to claim 1, characterized in that: The upper end of the sampling tube (1) is integrally formed with a first threaded sleeve (11), and the inner wall of the lower end of the sampling tube (1) is provided with a second threaded groove (13).

4. A quantitative sampling device according to claim 3, characterized in that: The inner wall of the lower end of the top cover (2) is provided with a first thread groove (12), and the first thread groove (12) is matched with the first thread sleeve (11).

5. A quantitative sampling device according to claim 3, characterized in that: The top of the bottom cover (3) is integrally formed with a second threaded sleeve (14), and the second threaded groove (13) is matched with the second threaded sleeve (14).

6. A quantitative sampling device according to claim 1, characterized in that: A suction tube (15) connected to the inner cavity of the sampling tube (1) is arranged at the bottom center of the bottom cover (3), a rubber sleeve (16) is bonded to the outer wall of the suction tube (15), and a plug-in portion (17) is arranged at the upper end of the suction head (7), and the suction tube (15) is sealed and plugged into the interior of the plug-in portion (17).

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