Liquid drug sampling device

Abstract

The application relates to a liquid medicine sampling device and belongs to the technical field of medicine sampling. The device comprises a sampling tube, a piston plate is slidably arranged in the sampling tube, a piston rod is fixedly connected to the top end of the piston plate, a fixing ring is fixedly connected to the outside of the sampling tube, a threaded rod is rotatably connected to one end in the fixing ring, a limiting rod is slidably connected to the other end in the fixing ring, a connecting piece is arranged above the fixing ring, and the connecting piece is rotatably connected with the threaded rod. The application has the beneficial effect that the rotation of the threaded rod can drive the connecting piece to move, and the connecting piece can move up and down under the limiting action of the limiting rod, the limiting rod can be lifted, and the inside of the sampling tube can generate negative air pressure, so that the purpose of sucking liquid medicine samples can be achieved. With the scale on the limiting rod, the staff can clearly understand the sampling capacity of the liquid medicine, and the sampling can be more accurate.

Description

Technical Field

[0001] This application relates to the field of drug sampling technology, and more particularly to a liquid drug sampling device. Background Technology

[0002] In the pharmaceutical industry's drug testing process, liquid drug samplers are specialized tools used to accurately obtain liquid samples during quality control. Their core function is to ensure that the samples taken are representative, and the performance of liquid drug samplers directly affects the accuracy of the test results.

[0003] A search revealed a Chinese patent disclosure for a liquid drug sampler (authorization announcement number CN213422706U), comprising a cylinder and a suction mechanism. The lower part of the cylinder is provided with an insertion tube, and the cylinder and suction mechanism are connected by threads. The lower part of the suction mechanism has a piston that cooperates with the cylinder. The suction mechanism has a vertical smooth area with graduations. This patented technology has excellent stability, preventing changes in the inhaled drug due to careless operation, and can precisely control the amount of inhaled drug. In addition, the lower part of the insertion tube has a conical structure and a tapered structure, effectively preventing small droplets from adhering to the insertion tube.

[0004] However, the above-mentioned device still has some drawbacks in actual use. The most obvious ones are that the hand is prone to shaking when the sampler is taking samples, the sampling stability is inconsistent, and the sampler does not have a scale structure, making it difficult to record the volume of the sampled liquid. In addition, the insertion tube lacks an important anti-backflow structure, and the backflow of the drug liquid may contaminate the drug inside the tube. Utility Model Content

[0005] In view of the above-mentioned problems existing in the prior art, the main objective of this application is to provide a liquid drug sampling device.

[0006] The technical solution of this application is as follows: a liquid medicine sampling device includes a sampling tube, a piston plate is slidably installed inside the sampling tube, a piston rod is fixedly connected to the top of the piston plate, a fixing ring is fixedly connected to the outside of the sampling tube, a threaded rod is rotatably connected to one end inside the fixing ring, a limit rod is slidably connected to the other end inside the fixing ring, a connector is provided above the fixing ring, the connector is rotatably connected to the threaded rod, the connector is fixedly connected to the limit rod, and a scale is embedded inside the limit rod.

[0007] By adopting the above technical solution, the rotation of the threaded rod can drive the connecting part to move, and under the limiting action of the limiting rod, the connecting part will move up and down, and the limiting rod will also move up and down, thereby generating negative air pressure inside the sampling tube, so as to achieve the purpose of absorbing the drug liquid sample.

[0008] In a preferred embodiment, a feeding tube is fixedly connected to the bottom end of the sampling tube, and a quick-release assembly is provided at the bottom end of the feeding tube. The quick-release assembly includes a magnetic ring b fixedly connected to the bottom outer side of the feeding tube.

[0009] By adopting the above technical solution, and through the combined use of magnetic ring b and magnetic ring a, the sampling head and the feeding tube can be quickly disassembled and assembled.

[0010] In a preferred embodiment, the quick-release assembly further includes a magnetic ring a fixedly connected to the top outer side of the sampling head, wherein the magnetic ring a and the magnetic ring b are attracted to each other.

[0011] By adopting the above technical solution, leakage at the connection point can be avoided.

[0012] In a preferred embodiment, the feed tube is provided with a sealing assembly, which includes a sealing ring fixedly connected to the top of the sampling head, and a sealing ring that cooperates with the sealing ring is provided inside the feed tube.

[0013] By adopting the above technical solution, the sealing performance at the connection between the feed pipe and the sampling head can be improved through the combined use of sealing rings and sealing rings.

[0014] In a preferred embodiment, the sealing ring engages with the magnetic ring a, and a limit block is fixedly connected to the bottom end of the scale.

[0015] By adopting the above technical solution, it becomes easier for staff to observe the ruler.

[0016] In a preferred embodiment, the fixing ring is made of transparent glass, a check valve is fixedly installed inside the feed tube, and the piston rod is fixedly connected to the connecting piece.

[0017] By adopting the above technical solution and setting up a check valve, backflow and contamination of the medicine solution can be prevented.

[0018] Compared with the prior art, the advantages and positive effects of this application are as follows:

[0019] 1. In this application, the rotation of the threaded rod can drive the connecting part to move, and under the limiting action of the limiting rod, the connecting part will move up and down, and the limiting rod will also move up and down, thereby generating negative air pressure inside the sampling tube, so as to achieve the purpose of absorbing the drug liquid sample. With the help of the scale on the limiting rod, the staff can clearly understand the sampling volume of the drug liquid, which can make the sampling more accurate.

[0020] 2. In this application, the use of magnetic ring b and magnetic ring a together enables rapid disassembly and assembly between the sampling head and the feeding tube, which facilitates cleaning of the feeding tube and sampling head after sampling, thus avoiding the risk of cross-contamination of medicines. Attached Figure Description

[0021] Figure 1 This application provides an overall perspective view of a liquid drug sampling device;

[0022] Figure 2 This application provides a half-sectional view of a liquid drug sampling device;

[0023] Figure 3 This application provides a bottom view of a liquid drug sampling device;

[0024] Figure 4 This application provides a liquid pharmaceutical sampling device. Figure 3 Enlarged view of point A in the middle.

[0025] Legend: 1. Sampling tube; 2. Fixing ring; 3. Connector; 4. Limiting rod; 5. Threaded rod; 6. Scale; 7. Feeding tube; 8. Sampling head; 9. Piston plate; 10. Piston rod; 11. Sealing ring; 12. Magnetic ring a; 13. Sealing ring; 14. Magnetic ring b; 15. Check valve. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] Reference Figure 1-4A liquid medicine sampling device includes a sampling tube 1, a piston plate 9 slidably installed inside the sampling tube 1, a piston rod 10 fixedly connected to the top of the piston plate 9, a fixing ring 2 fixedly connected to the outside of the sampling tube 1, a threaded rod 5 rotatably connected to one end of the fixing ring 2, and a limiting rod 4 slidably connected to the other end of the fixing ring 2. A connector 3 is provided above the fixing ring 2, the connector 3 is rotatably connected to the threaded rod 5, and the connector 3 is fixedly connected to the limiting rod 4. A scale 6 is embedded inside the limiting rod 4. By rotating the threaded rod 5, the connector 3 can be moved, and under the limiting action of the limiting rod 4, the connector 3 will move up and down, and the limiting rod 4 will move up and down. This will generate negative pressure inside the sampling tube 1, thereby achieving the purpose of sampling the liquid medicine. With the help of the scale 6 on the limiting rod 4, the staff can clearly know the sampling volume of the liquid medicine, making the sampling more accurate.

[0028] Specifically, the bottom end of the sampling tube 1 is fixedly connected to the discharge tube 7. The bottom end of the discharge tube 7 is equipped with a quick-release assembly, which includes a magnetic ring b14 fixedly connected to the bottom outer side of the discharge tube 7. Through the cooperation of the magnetic ring b14 and the magnetic ring a12, the sampling head 8 and the discharge tube 7 can be quickly disassembled and assembled, which facilitates the cleaning of the discharge tube 7 and the sampling head 8 after sampling, avoiding the risk of cross-contamination of medicines. The quick-release assembly also includes a magnetic ring a12 fixedly connected to the top outer side of the sampling head 8. The magnetic ring a12 and the magnetic ring b14 are attracted to each other. The discharge tube 7 is equipped with a sealing assembly. Through the cooperation of the sealing ring 11 and the sealing ring 13, the sealing performance at the connection between the discharge tube 7 and the sampling head 8 can be improved, avoiding leakage at the connection. The sealing assembly includes a sealing ring 11 fixedly connected to the top of the sampling head 8, and a sealing ring 13 that cooperates with the sealing ring 11 is opened inside the discharge tube 7.

[0029] Specifically, the sealing ring 13 engages with the magnetic ring a12, the bottom of the scale 6 is fixedly connected to a limit block, the fixing ring 2 is made of transparent glass, which makes it convenient for staff to observe the scale 6, the inside of the feed pipe 7 is fixedly installed with a check valve 15, which can prevent the backflow of medicine and contamination by setting the check valve 15, and the piston rod 10 is fixedly connected to the connector 3.

[0030] Working principle: First, the operator can attach the sampling head 8 to the feed tube 7 and rotate the bottom end of the threaded rod 5, which will drive the connecting part 3 to move. Under the limiting action of the limiting rod 4, the connecting part 3 will move up and down, and the limiting rod 4 will also move up and down. This will create negative pressure inside the sampling tube 1, thereby achieving the purpose of extracting the drug sample. With the help of the scale 6 on the limiting rod 4, the operator can clearly know the sampling volume of the drug. Through the cooperation of the magnetic ring b14 and magnetic ring a12, the sampling head 8 and the feed tube 7 can be quickly disassembled and assembled, which facilitates the cleaning of the feed tube 7 and the sampling head 8 after sampling, avoiding the risk of cross-contamination of the drugs. The check valve 15 can prevent the backflow of the drug and contamination.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.

Claims

1. A liquid medicine sampling device, comprising a sampling tube (1), characterized in that: A piston plate (9) is slidably installed inside the sampling tube (1). A piston rod (10) is fixedly connected to the top of the piston plate (9). A fixing ring (2) is fixedly connected to the outside of the sampling tube (1). A threaded rod (5) is rotatably connected to one end of the fixing ring (2). A limit rod (4) is slidably connected to the other end of the fixing ring (2). A connector (3) is provided above the fixing ring (2). The connector (3) is rotatably connected to the threaded rod (5). The connector (3) is fixedly connected to the limit rod (4). A scale (6) is embedded inside the limit rod (4).

2. The liquid medicine sampling device according to claim 1, characterized in that: The bottom end of the sampling tube (1) is fixedly connected to the feeding tube (7), and the bottom end of the feeding tube (7) is provided with a quick-release assembly, which includes a magnetic ring b (14) fixedly connected to the bottom end of the outer side of the feeding tube (7).

3. The liquid medicine sampling device according to claim 2, characterized in that: The quick-release assembly also includes a magnetic ring a (12) fixedly connected to the top of the outer side of the sampling head (8), and the magnetic ring a (12) is attracted to the magnetic ring b (14).

4. A liquid medicine sampling device according to claim 2, characterized in that: The feed tube (7) is provided with a sealing assembly inside. The sealing assembly includes a sealing ring (11) fixedly connected to the top of the sampling head (8). The feed tube (7) is provided with a sealing ring (13) that works with the sealing ring (11).

5. A liquid medicine sampling device according to claim 4, characterized in that: The sealing ring (13) engages with the magnetic ring a (12), and the bottom end of the scale (6) is fixedly connected to a limit block.

6. A liquid medicine sampling device according to claim 2, characterized in that: The fixing ring (2) is made of transparent glass, and a check valve (15) is fixedly installed inside the feed tube (7). The piston rod (10) is fixedly connected to the connector (3).

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