A sampling device for chemical material detection

Abstract

The utility model relates to the technical field of chemical material detection, and specifically provides a sampling device for chemical material detection, the sampling device of the utility model includes: the bottle body of detection, the bottle stopper is installed to the top of detection, the infusion tube is inserted and set in the bottle stopper, the bottom end of infusion tube extends to the bottom of detection bottle body, and the top end of infusion tube extends to the outside of detection bottle body, valve subassembly, valve subassembly communicates with the top end of infusion tube, sampling tube, the bottom end of sampling tube communicates with valve subassembly, and the top end of sampling tube is provided with liquid pumping structure, to draw the material in the detection bottle body into the infusion tube, and the infusion tube extends to the bottom of bottle body and can ensure that the chemical material of different depth in the bottle is extracted, avoids the deviation of detection due to insufficient sampling, and the cooperation of valve subassembly and liquid pumping structure can realize controllable sampling, prevents the leakage of chemical material in the sampling process, avoids the impurity of outside into bottle body and pollutes the sample, and guarantees the authenticity of subsequent detection result.

Description

Technical Field

[0001] This utility model relates to the field of chemical material testing technology, specifically providing a sampling device for chemical material testing. Background Technology

[0002] In chemical material testing, the sampling operation of liquid chemical materials is crucial, as it directly affects the accuracy of test results and the safety of operators. If sample contamination, reagent leakage, or sampling deviation occurs during sampling, it will not only lead to distorted test results, but may also cause safety accidents due to exposure to corrosive or volatile reagents. Traditional sampling often uses open bottles with temporary tubes inserted. Without a fixed stopper to restrain the tube, either the volatile reagents leak due to poor sealing, or the tube cannot be stably extended to the bottom of the bottle, only the upper layer of liquid can be drawn, resulting in uneven sampling. In addition, the liquid extraction components and sampling tubes are often temporarily matched with loose connections, which not only makes them easy to fall off and leak during operation, making it difficult for a single person to operate, but also poses a risk of reagent spillage due to component separation.

[0003] Accordingly, there is a need in the field for a new sampling device for the testing of chemical materials to solve the above-mentioned technical problems. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem of poor sampling effect of existing chemical material testing and sampling devices.

[0005] This utility model provides a sampling device for testing chemical materials, the sampling device comprising: The bottle to be tested has a stopper installed on its top, and an infusion tube is inserted into the stopper. The bottom end of the infusion tube extends to the bottom of the bottle to be tested, and the top end of the infusion tube extends to the outside of the bottle to be tested. A valve assembly, wherein the valve assembly is connected to the top end of the infusion tube; A sampling tube is provided, the bottom end of which is connected to the valve assembly, and the top end of which is provided with a liquid extraction structure to draw the material in the bottle to be tested into the infusion tube.

[0006] Based on the above structural design, the infusion tube extends to the bottom of the bottle to ensure that chemical materials at different depths inside the bottle can be extracted, avoiding detection deviations due to insufficient sampling. On the other hand, the cooperation between the valve assembly and the liquid extraction structure enables controllable sampling, which not only prevents leakage of chemical materials during the sampling process, but also prevents external impurities from entering the bottle and contaminating the sample, ensuring the authenticity of subsequent test results. The overall structure is adaptable to various sampling scenarios such as laboratories and on-site operations, and has a low operating threshold.

[0007] In the preferred embodiment of the above-mentioned sampling device for chemical material testing, the valve assembly includes a connecting pipe and a ball valve. The first end of the connecting pipe is connected to the infusion pipe, the second end of the connecting pipe is connected to the sampling pipe, and the ball valve is disposed on the connecting pipe.

[0008] Based on the above structural design, the connecting pipe can achieve a stable transition connection between the infusion pipe and the sampling pipe, avoiding material retention or leakage due to pipe diameter mismatch; the ball valve's switching characteristics are adapted to the sampling needs of chemical materials. Compared with ordinary valves, the ball valve is more flexible in switching, and can quickly cut off or open the flow path, reducing the amount of material residue in the flow path. At the same time, the ball valve has excellent sealing performance, which can effectively prevent corrosive chemical materials from leaking from the valve gaps, protecting the safety of operators and extending the service life of the device.

[0009] In the preferred embodiment of the above-mentioned sampling device for chemical material testing, the first end of the connecting tube is connected to the infusion tube through a first threaded structure; the second end of the connecting tube is connected to the sampling tube through a second threaded structure.

[0010] Based on the above structural design, the threaded connection facilitates the disassembly and maintenance of the device. When a component is damaged, there is no need to replace the entire device; only the corresponding component needs to be replaced, thus reducing the cost of use.

[0011] In the preferred technical solution of the above-mentioned sampling device for chemical material testing, the ball valve is provided with a rotary switch, and the outer wall of the rotary switch is provided with anti-slip texture.

[0012] Based on the above structural design, operators often wear protective gloves or their hands may be contaminated with trace amounts of reagents during chemical testing. The anti-slip texture can significantly increase the friction between the hand and the knob, allowing operators to easily turn the knob without extra force, thus achieving precise valve start and stop.

[0013] In the preferred technical solution of the above-mentioned sampling device for chemical material testing, the liquid extraction structure includes a negative pressure liquid extraction airbag and an exhaust end. The air inlet of the negative pressure liquid extraction airbag is connected to the top of the sampling tube, and the exhaust end is located at the top of the negative pressure liquid extraction airbag.

[0014] Based on the above structural design, the negative pressure suction airbag can generate negative pressure by manual squeezing, without the need for an external power supply or air pump. It is suitable for on-site sampling scenarios without power supply and is easy to operate, allowing a single person to complete the sampling. The negative pressure inside the airbag can be flexibly adjusted at the exhaust end to prevent the material from rushing into the sampling tube and overflowing due to excessive negative pressure, ensuring that the sampling volume meets the testing requirements and reducing material waste.

[0015] In the preferred technical solution of the above-mentioned sampling device for chemical material testing, a one-way check valve is provided at the connection between the negative pressure suction airbag and the sampling tube.

[0016] Based on the above structural design, when the negative pressure airbag is released, the one-way check valve can prevent the chemical materials that have been drawn into the sampling tube from flowing back into the bottle to be tested, thus avoiding the backflow of materials carrying impurities from the sampling tube and contaminating the original sample in the bottle.

[0017] In the preferred technical solution of the above-mentioned sampling device for chemical material testing, the outer wall of the negative pressure liquid suction bag is wrapped with a rubber protective layer, and the exhaust end is provided with a detachable dust cap.

[0018] Based on the above structural design, the rubber protective layer has the characteristics of being resistant to friction and slight corrosion, which can resist possible collisions and frictions in the chemical sampling environment, while preventing the airbag from being corroded by acidic or alkaline reagents and extending the service life of the airbag.

[0019] In the preferred technical solution of the above-mentioned sampling device for chemical material testing, the bottle stopper is made of elastic silicone, the bottle stopper is provided with an annular sealing groove, and a silicone sealing ring is installed in the annular sealing groove.

[0020] Based on the above structural design, the elastic silicone material has good deformation ability, which can closely fit the bottle mouth and the outer wall of the infusion tube of the bottle to be tested, adapt to bottle mouths and infusion tubes of different sizes, and reduce the basic sealing gap.

[0021] In the preferred embodiment of the above-mentioned sampling device for chemical material testing, a reinforcing sleeve is provided at the connection between the infusion tube and the bottle stopper, and the inner wall of the reinforcing sleeve is bonded and fixed to the outer wall of the infusion tube; the outer wall of the reinforcing sleeve is bonded and fixed to the bottle stopper.

[0022] Based on the above structural design, during chemical sampling, the infusion tube needs to withstand the negative pressure during liquid extraction or the slight pulling when moving the device. If the connection between the infusion tube and the bottle stopper is loose, it can easily lead to material leakage or the infusion tube falling off. The reinforcement sleeve enhances the connection strength through double bonding between the inner wall and the infusion tube and the outer wall and the bottle stopper, preventing the infusion tube from shifting, shaking or falling off during the sampling process.

[0023] In the preferred technical solution of the above-mentioned sampling device for chemical material testing, the infusion tube is made of polytetrafluoroethylene, and a conical filter head is provided at the bottom end of the infusion tube.

[0024] Based on the above structural design, polytetrafluoroethylene (PTFE) has excellent acid and alkali resistance, as well as high and low temperature resistance. It can be used for sampling of most chemical materials, avoiding corrosion and damage to the infusion tube, while preventing the material itself from dissolving or precipitating impurities that could contaminate the sample, thus ensuring sample purity. Attached Figure Description

[0025] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which: Figure 1A schematic diagram of the overall structure of this utility model is shown; Figure 2 The diagram shows the first thread structure and the second thread structure of this utility model.

[0026] Figure label: 1. Bottle to be tested; 2. Infusion tube; 3. Bottle stopper; 4. Connecting tube; 5. Rotary switch; 6. Sampling tube; 7. Negative pressure suction bag; 8. Exhaust end; 9. Silicone sealing ring; 10. Reinforcing sleeve; 11. First thread structure; 12. Second thread structure. Detailed Implementation

[0027] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0028] It should be noted that in the description of this utility model, the terms "middle," "upper," "lower," "left," "right," "inner," and "outer," which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the structure must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] This utility model provides a sampling device for testing chemical materials, the sampling device comprising: The bottle to be tested is 1, and a bottle stopper 3 is installed on the top of the bottle to be tested. An infusion tube 2 is inserted into the bottle stopper 3. The bottom end of the infusion tube 2 extends to the bottom of the bottle to be tested, and the top end of the infusion tube 2 extends to the outside of the bottle to be tested. Valve assembly, which is connected to the top of infusion tube 2; The sampling tube 6 is connected to the valve assembly at its bottom end and has a liquid extraction structure at its top end to draw the material inside the test bottle 1 into the infusion tube 2. The infusion tube 2 extends to the bottom of the bottle to ensure that chemical materials at different depths are extracted from the bottle, avoiding detection deviations due to insufficient sampling. On the other hand, the cooperation between the valve assembly and the liquid extraction structure enables controllable sampling, preventing leakage of chemical materials during sampling and avoiding external impurities from entering the bottle and contaminating the sample, thus ensuring the authenticity of subsequent test results. The overall structure is suitable for various sampling scenarios such as laboratories and field operations, and has a low operating threshold.

[0031] Furthermore, the valve assembly includes a connecting pipe 4 and a ball valve. The first end of the connecting pipe 4 is connected to the infusion pipe 2, and the second end of the connecting pipe 4 is connected to the sampling pipe 6. The ball valve is installed on the connecting pipe 4. The connecting pipe 4 can achieve a stable transition connection between the infusion pipe 2 and the sampling pipe 6, avoiding material retention or leakage due to pipe diameter mismatch. The switching characteristics of the ball valve are adapted to the sampling needs of chemical materials. Compared with ordinary valves, the ball valve is more flexible in switching and can quickly cut off or open the flow path, reducing the amount of material residue in the flow path. At the same time, the ball valve has excellent sealing performance, which can effectively prevent corrosive chemical materials from leaking from the valve gaps, protecting the safety of operators and extending the service life of the device.

[0032] Furthermore, the first end of the connecting tube 4 is connected to the infusion tube 2 through the first threaded structure 11; the second end of the connecting tube 4 is connected to the sampling tube 6 through the second threaded structure 12. The threaded connection facilitates the disassembly and maintenance of the device. When a component is damaged, there is no need to replace the entire device; only the corresponding component needs to be replaced, thus reducing the cost of use.

[0033] Furthermore, the ball valve is equipped with a rotary switch 5, and the outer wall of the rotary switch 5 is provided with anti-slip texture. During chemical testing, operators often wear protective gloves or their hands may be contaminated with trace amounts of reagents. The anti-slip texture can significantly increase the friction between the hand and the knob, allowing the operator to easily turn the knob without extra force, thus achieving precise start and stop of the valve.

[0034] Furthermore, the liquid extraction structure includes a negative pressure liquid extraction airbag 7 and an exhaust end 8. The air inlet of the negative pressure liquid extraction airbag 7 is connected to the top of the sampling tube 6, and the exhaust end 8 is located at the top of the negative pressure liquid extraction airbag 7. The negative pressure liquid extraction airbag 7 can generate negative pressure by manual squeezing, without the need for an external power supply or air pump. It is suitable for on-site sampling scenarios without power supply and is easy to operate, allowing a single person to complete the sampling. The exhaust end 8 can flexibly adjust the negative pressure inside the airbag to prevent the material from rushing into the sampling tube 6 and overflowing due to excessive negative pressure, ensuring that the sampling volume meets the testing requirements and reducing material waste.

[0035] Furthermore, a one-way check valve is provided at the connection between the negative pressure suction airbag 7 and the sampling tube 6. When the negative pressure airbag is released, the one-way check valve can prevent the chemical material that has been drawn into the sampling tube 6 from flowing back to the bottle body 1 to be tested, thus avoiding the backflow of material carrying impurities in the sampling tube 6 and contaminating the original sample in the bottle.

[0036] Furthermore, the outer wall of the negative pressure suction airbag 7 is wrapped with a rubber protective layer, and a removable dust cap is provided at the exhaust end 8. The rubber protective layer has the characteristics of being resistant to friction and slight corrosion, which can resist possible collisions and frictions in the chemical sampling environment, while preventing the airbag from being corroded by acidic or alkaline reagents and extending the service life of the airbag.

[0037] Furthermore, the stopper 3 is made of elastic silicone material. The stopper 3 has an annular sealing groove, and a silicone sealing ring 9 is installed in the annular sealing groove. The elastic silicone material has good deformation ability and can fit tightly to the bottle mouth of the bottle body 1 to be tested and the outer wall of the infusion tube 2, adapting to bottle mouths and infusion tubes 2 of different sizes, and reducing the basic sealing gap.

[0038] Furthermore, a reinforcing sleeve 10 is provided at the connection between the infusion tube 2 and the bottle stopper 3. The inner wall of the reinforcing sleeve 10 is bonded and fixed to the outer wall of the infusion tube 2. The outer wall of the reinforcing sleeve 10 is bonded and fixed to the bottle stopper 3. During chemical sampling, the infusion tube 2 needs to withstand the negative pressure during liquid extraction or the slight pulling when moving the device. If the connection between the infusion tube 2 and the bottle stopper 3 is loose, it is easy to cause material leakage or the infusion tube 2 to fall off. The reinforcing sleeve 10 enhances the connection strength through the double bonding between the inner wall and the infusion tube 2 and the outer wall and the bottle stopper 3, and avoids the infusion tube 2 from shifting, shaking or falling off during the sampling process.

[0039] Furthermore, the infusion tube 2 is made of polytetrafluoroethylene (PTFE), and a conical filter head is provided at the bottom end of the infusion tube 2. PTFE has excellent acid and alkali resistance and high and low temperature resistance, which can be used for sampling of most chemical materials, avoiding corrosion and damage to the infusion tube 2, and preventing the material itself from dissolving or precipitating impurities to contaminate the sample, thus ensuring the purity of the sample.

[0040] This application requires sampling 20 mL of a 5% hydrochloric acid solution for pH and chloride ion content detection. The operating steps are as follows: First, tighten the connecting tube 4 and the sampling tube 6 through the second thread structure 12, open the bottle stopper 3 of the bottle to be tested 1, pour 5% hydrochloric acid solution into the bottle 1, and tighten the bottle stopper 3 to ensure that the conical filter head of the infusion tube 2 is immersed in the solution. Rotate the ball valve knob switch to the open position (5), and remove the dust cap from the liquid extraction structure; Squeeze the negative pressure suction airbag 7 by hand until it is at its smallest volume, hold the squeezed state for 1 second and then slowly release it. The airbag will rebound and generate negative pressure. The hydrochloric acid solution will be filtered through the conical filter head and then enter the sampling tube 6 through the infusion tube 2 and the valve assembly. Observe the volume scale line of the sampling tube 6. When the liquid level reaches the 20mL mark, stop releasing the airbag. Rotate the ball valve knob switch 5 to the closed position to cut off the flow path; at this time, the infusion tube 2 can be separated from the connecting tube 4 by screwing on the first thread structure 11, and the sample inside the sampling tube can be moved to other positions. The technical solution of this utility model has been described in conjunction with the optional embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A sampling device for testing chemical materials, characterized in that, The sampling device includes: The bottle to be tested has a stopper installed on its top, and an infusion tube is inserted into the stopper. The bottom end of the infusion tube extends to the bottom of the bottle to be tested, and the top end of the infusion tube extends to the outside of the bottle to be tested. A valve assembly, wherein the valve assembly is connected to the top end of the infusion tube; A sampling tube is provided, the bottom end of which is connected to the valve assembly, and the top end of which is provided with a liquid extraction structure to draw the material in the bottle to be tested into the infusion tube.

2. The sampling device for chemical material testing according to claim 1, characterized in that, The valve assembly includes a connecting pipe and a ball valve. The first end of the connecting pipe is connected to the infusion pipe, and the second end of the connecting pipe is connected to the sampling pipe. The ball valve is disposed on the connecting pipe.

3. The sampling device for chemical material testing according to claim 2, characterized in that, The first end of the connecting tube is connected to the infusion tube via a first threaded structure; the second end of the connecting tube is connected to the sampling tube via a second threaded structure.

4. The sampling device for chemical material testing according to claim 3, characterized in that, The ball valve is equipped with a rotary switch, and the outer wall of the rotary switch is provided with anti-slip texture.

5. The sampling device for chemical material testing according to claim 1, characterized in that, The liquid extraction structure includes a negative pressure liquid extraction airbag and an exhaust end. The air inlet of the negative pressure liquid extraction airbag is connected to the top of the sampling tube, and the exhaust end is located at the top of the negative pressure liquid extraction airbag.

6. The sampling device for chemical material testing according to claim 5, characterized in that, A one-way check valve is provided at the connection between the negative pressure suction airbag and the sampling tube.

7. The sampling device for chemical material testing according to claim 6, characterized in that, The outer wall of the negative pressure suction airbag is wrapped with a rubber protective layer, and the exhaust end is equipped with a detachable dust cap.

8. The sampling device for chemical material testing according to claim 1, characterized in that, The bottle stopper is made of elastic silicone and has an annular sealing groove, in which a silicone sealing ring is installed.

9. The sampling device for chemical material testing according to claim 1, characterized in that, A reinforcing sleeve is provided at the connection between the infusion tube and the bottle stopper. The inner wall of the reinforcing sleeve is bonded and fixed to the outer wall of the infusion tube; the outer wall of the reinforcing sleeve is bonded and fixed to the bottle stopper.

10. The sampling device for chemical material testing according to claim 1, characterized in that, The infusion tube is made of polytetrafluoroethylene and has a tapered filter head at the bottom end.

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