A sampling device for chemical analysis and detection

Abstract

This utility model discloses a sampling device for chemical analysis and detection, including a liquid extraction tube and a hand-held, continuously circulating suction and discharge mechanism installed at its top. The hand-held, continuously circulating suction and discharge mechanism includes a cylinder with an opening at the top and an external spiral handle fixedly connected thereto. This utility model, through a series of structural features, facilitates the continuous suction and discharge of liquid samples by repeatedly lifting and releasing the sample with fingers. By continuously extracting and discharging the liquid sample in one go, it achieves the effect of continuous sampling and discharge in one integrated manner. When a large number of chemical liquid samples are required, there is no need for multiple suction and relocation operations or separate discharge operations. This facilitates rapid sampling of large quantities of liquid samples, improves sampling efficiency, and allows for easy removal and replacement of the liquid extraction tube after use, or reduces the space occupied at the bottom when not in use, making it easier for personnel to carry and operate.

Description

Technical Field

[0001] This utility model relates to the field of sampling equipment technology, specifically a sampling device for chemical analysis and detection. Background Technology

[0002] Chemical analysis is a detection process that involves known and quantitative chemical reactions. Instruments such as conductivity meters, colorimeters, micro-water analyzers, and gas chromatographs are required for detection and analysis. Before conducting formal chemical analysis, a lot of preparatory work is required, and sampling is a very important step.

[0003] Existing methods for liquid sampling in chemical analysis and testing typically involve using a dropper to squeeze and draw the sample, then squeezing it out into a sample bottle for testing. However, these methods have several drawbacks: continuous sampling is difficult to perform in one continuous operation; when a large number of chemical liquid samples are needed, the dropper must be used repeatedly for suction, transfer, and discharge, which affects operational efficiency and makes it unsuitable for rapid sampling of large quantities of liquid samples. Therefore, this application proposes a sampling device for chemical analysis and testing to address the aforementioned problems. Utility Model Content

[0004] The purpose of this invention is to provide a sampling device for chemical analysis and detection in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sampling device for chemical analysis and detection, comprising a sampling tube and a handheld, continuously circulating suction and discharge mechanism installed at its top, wherein the handheld, continuously circulating suction and discharge mechanism includes:

[0006] A cylinder with an opening at the top and an external loop handle fixedly connected thereto. A partition is fixedly connected to the inside of the cylinder, and a discharge pipe communicating with the inside of the cylinder is embedded and fixed on the top right side of the partition.

[0007] A one-way liquid-passing connector is fixed to the bottom of the cylinder and fitted onto the outer top of the liquid-taking tube; the one-way liquid-passing connector is used to draw liquid samples through the liquid-taking tube and supply them into the cylinder in one direction when suction force is generated inside the cylinder.

[0008] The piston is sealed and slidably sleeved inside the cylinder, and a first one-way valve with the top outlet is embedded and fixed on the right side of the piston.

[0009] The lifting spring return assembly is installed on the partition and the outer loop handle, and is fixedly connected to the top of the piston. The lifting spring return assembly is used to drive the piston to move up and down reciprocally. The piston moves up to achieve suction inside the cylinder, and the piston moves down to squeeze the sucked liquid sample, so that the liquid sample is supplied to the upper part of the piston in one direction through the first one-way valve under the squeezing force. The piston moves up again to squeeze the liquid into the discharge pipe for discharge. The reciprocating up and down movement of the piston achieves the effect of cyclically sucking and discharging liquid samples.

[0010] Preferably, the one-way liquid insertion assembly includes a second one-way valve fixed to the bottom of the cylinder. The bottom of the second one-way valve is an inlet and is connected to a sleeve with an open bottom. An anti-slip damping rubber sleeve is adhesively fitted inside the sleeve and is in a taut state. The inner side of the anti-slip damping rubber sleeve is pressed tightly against the outer top of the liquid extraction tube.

[0011] Preferably, the lifting spring reset assembly includes a vertical guide sleeve embedded and fixed between the bottom of the outer loop handle and the top of the partition plate. A vertical guide rod is sealed and slidably sleeved inside the vertical guide sleeve. The top end of the vertical guide rod extends into the outer loop handle and is fixedly connected to an inner loop handle. Two tension springs are fixedly connected between the bottom of the inner loop handle and the top of the partition plate. The outer loop handle is movably sleeved on the two tension springs. The bottom end of the vertical guide rod is fixedly connected to the top of the piston.

[0012] Preferably, a connecting hole is provided on the bottom right side of the piston, and the bottom of the first one-way valve is the inlet and is connected to the bottom of the piston through the connecting hole.

[0013] Preferably, the bottom of the cylinder is fixedly connected to a protective shell with an open top, the second one-way valve is located inside the protective shell, the protective shell is movably sleeved on the outside of the inlet end of the second one-way valve, the bottom of the protective shell is fixedly connected to the top of the ferrule, and multiple rubber blocks are bonded and fixed in an annular shape at equal intervals at the bottom of the protective shell.

[0014] Preferably, the piston is fitted with a sealing ring on its outer side, which slides and contacts the inner wall of the cylinder.

[0015] Preferably, the discharge pipe consists of an L-shaped pipe and a liquid outlet head, with the right end of the L-shaped pipe extending movably out of the cylinder and connected and fixed to the top of the liquid outlet head.

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

[0017] 1. Through the combination of the set cylinder, piston, first one-way valve, outer loop handle, partition, discharge pipe, liquid collection pipe, one-way liquid connection assembly and pull spring support reset assembly, liquid samples can be cyclically drawn and discharged by the finger in a cyclical lifting and releasing manner. By continuously drawing liquid samples and discharging them in one go, the effect of continuous sampling and discharge can be achieved directly and directly. When a large number of chemical liquid samples are required, there is no need to draw, move and discharge them separately. It is convenient for rapid sampling of large quantities of liquid samples and improves sampling efficiency.

[0018] 2. By using the one-way liquid insertion assembly and the liquid dispensing tube, the liquid dispensing tube is inserted into the sleeve through the anti-slip damping rubber sleeve. This allows personnel to easily remove the liquid dispensing tube for replacement after use by simply plugging and unplugging it, or to remove the liquid dispensing tube when not in use to reduce the space occupied at the bottom, making it easier for personnel to carry and handle.

[0019] This invention features a series of structures that facilitate the cyclical extraction and discharge of liquid samples by repeatedly lifting and releasing them with the fingers. By continuously extracting and discharging the liquid sample in one go, it achieves a one-stop, continuous sampling effect. When a large number of chemical liquid samples are needed, there is no need for multiple extractions, relocations, and separate discharges. This makes it convenient for rapid sampling of large quantities of liquid samples, improving sampling efficiency. Furthermore, the extraction tube can be easily removed and replaced after use through a simple plug-and-play method, or its bottom space can be reduced when not in use, making it easier for personnel to carry and handle. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a sampling device for chemical analysis and detection proposed in this utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the structure viewed from below;

[0022] Figure 3 This is a schematic diagram of the front cross-sectional structure of a sampling device for chemical analysis and detection proposed in this utility model;

[0023] Figure 4 for Figure 3 A magnified structural diagram of part A in the diagram;

[0024] Figure 5 for Figure 3 A magnified structural diagram of part B in the diagram.

[0025] In the diagram: 1. Liquid collection tube; 2. Cylinder; 201. Protective shell; 202. Outer U-shaped handle; 203. Partition plate; 204. Discharge tube; 3. Second one-way valve; 301. Sleeve; 302. Anti-slip damping rubber sleeve; 4. Piston; 401. First one-way valve; 402. Vertical guide rod; 403. Inner U-shaped handle; 404. Tension spring; 405. Vertical guide sleeve. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figures 1 to 5 As shown in this embodiment, a sampling device for chemical analysis and detection includes a liquid sampling tube 1 and a portable, continuously circulating suction and discharge mechanism installed at its top. The portable, continuously circulating suction and discharge mechanism includes:

[0028] The cylinder 2 has an opening at the top and an external loop handle 202 fixedly connected thereto. A partition 203 is fixedly connected to the inside of the cylinder 2. A discharge pipe 204 communicating with the inside of the cylinder 2 is embedded and fixed on the top right side of the partition 203. The discharge pipe 204 consists of an L-shaped pipe and a liquid outlet head. The right end of the L-shaped pipe extends movably out of the cylinder 2 and is connected and fixed to the top of the liquid outlet head.

[0029] A one-way liquid-passing connector is fixed to the bottom of the cylinder 2 and fitted onto the outer side of the top of the liquid-taking tube 1; the one-way liquid-passing connector is used to draw liquid samples through the liquid-taking tube 1 and supply them into the cylinder 2 in one direction when a suction force is generated inside the cylinder 2.

[0030] Piston 4 is sealed and slidably fitted inside cylinder 2. A sealing ring is bonded to the outside of piston 4 and slides in contact with the inner wall of cylinder 2, which achieves the effect of sliding seal between the outside of piston 4 and the inside of cylinder 2. A first one-way valve 401 with the top outlet is embedded and fixed on the top right side of piston 4. An embedding groove is opened on the top right side of piston 4, and the first one-way valve 401 is fixedly connected to the bottom inner wall of the embedding groove. A connecting hole is opened on the bottom right side of piston 4. The bottom of the first one-way valve 401 is the inlet and is connected to the bottom of piston 4 through the connecting hole.

[0031] The lifting spring reset assembly is installed on the partition plate 203 and the outer loop handle 202, and is fixedly connected to the top of the piston 4. The lifting spring reset assembly is used to drive the piston 4 to move up and down reciprocally. The piston 4 moves up to achieve suction inside the cylinder 2, and the piston 4 moves down to squeeze the sucked liquid sample, so that the liquid sample is supplied to the upper part of the piston 4 in one direction through the first one-way valve 401 under the squeezing force. The piston 4 moves up again to squeeze the liquid into the discharge pipe 204 for discharge. The reciprocating up and down movement of the piston 4 achieves the effect of cyclically extracting, sucking and discharging the liquid sample.

[0032] Specifically, the one-way liquid-passing connector includes a second one-way valve 3 fixedly connected to the bottom of the cylinder 2. The bottom of the second one-way valve 3 is the inlet and is connected to a ferrule 301 with an open bottom. An anti-slip damping rubber sleeve 302 is bonded and fitted inside the ferrule 301 and is in a taut state. The inner side of the anti-slip damping rubber sleeve 302 is pressed and contacted with the outer top of the liquid-taking tube 1. A protective shell 201 with an open top is fixedly connected to the bottom of the cylinder 2. The second one-way valve 3 is located inside the protective shell 201. The protective shell 201 is movably fitted outside the inlet end of the second one-way valve 3. The bottom of the rear protective shell 201 has a movable through hole that movably contacts the outer side of the inlet end of the second one-way valve 3. The bottom of the protective shell 201 is fixedly connected to the top of the ferrule 301. Multiple rubber blocks are bonded and fixed in an annular shape at equal intervals at the bottom of the protective shell 201. The protective shell 201 is used to protect the second one-way valve 3.

[0033] The second one-way valve 3, the ferrule 301, and the anti-slip damping sleeve 302 work together to insert the bottom end of the liquid sampling tube 1 into the chemical liquid to be analyzed. When a suction force is generated in the cylinder 2, the liquid sample is extracted sequentially through the second one-way valve 3, the ferrule 301, and the liquid sampling tube 1. The extracted liquid sample is then supplied into the cylinder 2 in one direction through the second one-way valve 3. In addition, the anti-slip damping sleeve 302 is tightly fitted to the outside of the liquid sampling tube 1, which makes it easy to remove the liquid sampling tube 1 for replacement or to reduce the space occupied at the bottom when not in use, so as to facilitate personnel to carry it more easily.

[0034] Furthermore, the lifting spring reset assembly includes a vertical guide sleeve 405 embedded and fixed between the bottom of the outer loop handle 202 and the top of the partition 203. Both the bottom of the outer loop handle 202 and the top of the partition 203 have mounting holes for fixed connection with the outer side of the vertical guide sleeve 405. A vertical guide rod 402 is sealed and slidably sleeved inside the vertical guide sleeve 405. A sealing sleeve is adhesively sleeved inside the vertical guide sleeve 405, and the inner side of the sealing sleeve slides in contact with the outer side of the vertical guide rod 402, thus providing a seal between the inner side of the vertical guide sleeve 405 and the outer side of the vertical guide rod 402. The sliding seal between the outer sides of the rod 402 is achieved. The top of the vertical guide rod 402 extends into the outer loop handle 202 and is fixedly connected to the inner loop handle 403. Two tension springs 404 are fixedly connected between the bottom of the inner loop handle 403 and the top of the partition plate 203. The outer loop handle 202 is movably sleeved on the two tension springs 404. The bottom of the outer loop handle 202 has two circular through holes for the corresponding tension springs 404 to pass through. The bottom of the vertical guide rod 402 is fixedly connected to the top of the piston 4.

[0035] The vertical guide sleeve 405, vertical guide rod 402, inner loop handle 403, and tension spring 404 are configured to work together. When a person holds the outer loop handle 202, they use their fingers to pull and release the inner loop handle 403 upwards in a cyclical manner. When pulling upwards, the inner loop handle 403 moves upwards and stretches the two tension springs 404. When releasing, the two tension springs 404, which are in a stretched state, drive the inner loop handle 403 to move downwards. Under the cyclical pulling and releasing action, the inner loop handle 403 moves up and down repeatedly. The inner loop handle 403 drives the vertical guide rod 402 to slide up and down repeatedly within the vertical guide sleeve 405. The vertical guide rod 402 is used to drive the piston 4 to move up and down repeatedly.

[0036] The usage method of this embodiment is as follows: When using the chemical analysis and detection sampling device, after inserting the bottom end of the sampling tube 1 into the chemical liquid to be analyzed and sampled, the operator holds the outer loop handle 202 and uses their fingers to pull and release the inner loop handle 403 upwards in a cyclical manner. When pulling upwards, the inner loop handle 403 moves upwards and stretches the two tension springs 404. When releasing, the two tension springs 404 in the stretched state drive the inner loop handle 403 to move downwards. Under the cyclical pulling and releasing action, the inner loop handle 403 moves up and down repeatedly. The inner loop handle 403 drives the vertical guide rod 402 to slide up and down repeatedly within the vertical guide sleeve 405. The vertical guide rod 402 drives the piston 4 to move up and down repeatedly. When the piston 4 moves upwards, it draws suction from the cylinder 2. Under the suction force, the cylinder 2 is drawn through the second one-way valve 3, the clamp 301, and the sampling tube 1 in sequence. Liquid samples are taken and fed into cylinder 2 through the second one-way valve 3. When piston 4 moves down, it squeezes the liquid sample. Under the squeezing force, the liquid sample is fed upward into the upper part of piston 4 through the first one-way valve 401. When piston 4 moves up again, the liquid sample fed into the upper part is squeezed and discharged into discharge pipe 204 for discharge. Personnel only need to collect the liquid sample with a sample bottle at the end of discharge pipe 204. The reciprocating up and down movement of piston 4 achieves the effect of cyclically sucking and discharging liquid samples. By continuously sucking and discharging liquid samples in a cyclic manner, the effect of continuous sampling and discharge is achieved. When a large number of chemical liquid samples are needed, there is no need for multiple back-and-forth sucking and moving and separate discharge work. It is convenient for rapid sampling of large quantities of liquid samples and improves sampling efficiency.

[0037] For cleaning after use, the bottom end of the liquid dispensing tube 1 can be inserted into the cleaning solution or clean water, and the cleaning solution or clean water can be continuously pumped out in the same way as described above to carry out the cleaning work. In addition, the anti-slip damping rubber sleeve 302 is squeezed and connected to the outside of the liquid dispensing tube 1, which makes it easy to directly pull out the liquid dispensing tube 1 for replacement or to reduce the space occupied at the bottom when not in use, so as to make it easier for personnel to lift and carry.

[0038] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sampling device for chemical analysis, comprising a liquid taking tube (1) and a hand-held, continuously operating suction and discharge mechanism mounted at the top end of the tube, characterized in that: The portable, continuous suction and supply mechanism includes: A cylinder (2) has an opening at its top and an external loop handle (202) fixedly connected thereto. A partition (203) is fixedly connected to the inside of the cylinder (2). A discharge pipe (204) that communicates with the inside of the cylinder (2) is embedded and fixed on the top right side of the partition (203). A one-way liquid-passing connector is fixed to the bottom of the cylinder (2) and fitted onto the outer top of the liquid-taking tube (1); The piston (4) is sealed and slidably sleeved inside the cylinder (2), and a first one-way valve (401) with the top outlet is fixedly installed on the right side of the piston (4); The lifting spring reset assembly is mounted on the partition (203) and the outer loop handle (202) and is fixedly connected to the top of the piston (4).

2. A sampling device for chemical analysis according to claim 1, characterized in that: The one-way liquid insertion assembly includes a second one-way valve (3) fixed at the bottom of the cylinder (2). The bottom of the second one-way valve (3) is the inlet and is connected to a ferrule (301) with an open bottom. An anti-slip damping rubber sleeve (302) is adhesively fitted inside the ferrule (301) and is in a taut state. The inner side of the anti-slip damping rubber sleeve (302) is pressed tightly against the outer top of the liquid extraction tube (1).

3. A sampling device for chemical analysis according to claim 1, characterized in that: The lifting spring reset assembly includes a vertical guide sleeve (405) embedded and fixed between the bottom of the outer loop handle (202) and the top of the partition plate (203). A vertical guide rod (402) is sealed and slidably sleeved inside the vertical guide sleeve (405). The top end of the vertical guide rod (402) extends into the outer loop handle (202) and is fixedly connected to an inner loop handle (403). Two tension springs (404) are fixedly connected between the bottom of the inner loop handle (403) and the top of the partition plate (203). The outer loop handle (202) is movably sleeved on the two tension springs (404). The bottom end of the vertical guide rod (402) is fixedly connected to the top of the piston (4).

4. The sampling device for chemical analysis according to claim 1, characterized in that: The piston (4) has a connecting hole on the bottom right side, and the bottom of the first one-way valve (401) is the inlet and is connected to the bottom of the piston (4) through the connecting hole.

5. The sampling device for chemical analysis according to claim 2, characterized in that: The bottom of the cylinder (2) is fixedly connected to a protective shell (201) with an open top. The second one-way valve (3) is located inside the protective shell (201). The protective shell (201) is movably sleeved on the outside of the inlet end of the second one-way valve (3). The bottom of the protective shell (201) is fixedly connected to the top of the sleeve (301). The bottom of the protective shell (201) is bonded and fixed with multiple rubber blocks at equal intervals in a ring.

6. A sampling device for chemical analysis and detection according to claim 1, characterized in that: The piston (4) is fitted with a sealing ring on its outer side, which slides and contacts the inner wall of the cylinder (2).

7. A sampling device for chemical analysis and detection according to claim 1, characterized in that: The discharge pipe (204) consists of an L-shaped pipe and a liquid outlet head. The right end of the L-shaped pipe extends movably out of the cylinder (2) and is connected and fixed to the top of the liquid outlet head.

Images