Pipette for drug detection

Abstract

The utility model discloses a pipette for medicine detection, and relates to the technical field of medicine detection equipment. The pipette for medicine detection comprises a liquid taking cylinder and a piston connected in the liquid taking cylinder in a sliding mode, the bottom of the liquid taking cylinder is fixedly communicated with a liquid taking pipe, scale marks are arranged on the outer wall of the liquid taking cylinder, and the top of the liquid taking cylinder is open; the fastening ring is connected to the liquid taking cylinder in a sleeving manner; the measuring rod is arranged in a U shape and is fixedly connected to the fastening ring, and one end, far away from the fastening ring, of the measuring rod is in contact with the upper surface of the piston; the locking component is arranged on the fastening ring and is used for locking and limiting the measuring rod; according to the pipette disclosed by the utility model, the upward sliding distance of the piston in the liquid taking cylinder is limited, so that the liquid reagent taking precision of the pipette is improved, and the requirement on accurate liquid taking in the medicine detection process is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of pharmaceutical testing equipment, and more specifically, relates to a pipette for pharmaceutical testing. Background Art

[0002] A pipette, also known as a micropipette, is a measuring tool that transfers liquid from an original container to another container within a certain range of measurement, and is widely used in fields such as biology and chemistry.

[0003] During the process of medical drug manufacturing, researchers need to conduct sampling tests on the drugs during the preparation process to observe whether the active ingredients of the drugs meet the standards, and a pipette is a commonly used device for extracting a small amount of liquid drugs in pharmaceutical testing;

[0004] However, for currently existing pipettes, due to the lack of limiting components, when the pipette transfers liquid, the control accuracy of the liquid transfer volume may not be high enough, making it difficult to meet the requirements of high-precision liquid transfer in pharmaceutical testing. In view of this, the present utility model is specifically proposed. Summary of the Utility Model

[0005] The technical problem to be solved by the present utility model is to overcome the deficiencies of the prior art and provide a pipette for pharmaceutical testing that can overcome or at least partially solve the above problems.

[0006] To solve the above technical problem, the basic concept of the technical solution adopted by the present utility model is as follows:

[0007] A pipette for pharmaceutical testing includes a liquid extraction cylinder and a piston slidably connected in the liquid extraction cylinder. Among them, the bottom of the liquid extraction cylinder is fixedly communicated with a liquid extraction tube, a scale mark is provided on the outer wall of the liquid extraction cylinder, and the top of the liquid extraction cylinder is open; a fastening ring is sleeved on the liquid extraction cylinder; a measuring rod is U-shaped and fixedly connected to the fastening ring. Among them, the end of the measuring rod away from the fastening ring is in contact with the upper surface of the piston; a locking component is provided on the fastening ring and is used to lock and limit the measuring rod.

[0008] To enable the fastening ring to slide stably up and down on the liquid extraction cylinder, preferably, guide blocks are symmetrically and fixedly connected to the outer wall of the liquid extraction cylinder, guide grooves are opened on the inner wall of the fastening ring, and the guide blocks are slidably connected in the guide grooves.

[0009] Further, the locking component includes a fixing bolt. Threaded holes are symmetrically opened on the fastening ring, the fixing bolt is threadedly connected in the threaded hole, and the fixing bolt abuts against the guide block.

[0010] To facilitate the operator to control the up and down sliding of the piston in the liquid extraction cylinder, preferably, a connecting rod is fixedly connected to the piston, and a lifting handle is fixedly connected to the end of the connecting rod away from the piston. Symmetrically fixed connecting handles are provided at the upper end of the liquid extraction cylinder.

[0011] Preferably, the liquid extraction cylinder is made transparent.

[0012] Preferably, a liquid extraction needle is detachably connected to the liquid extraction tube.

[0013] To facilitate the disassembly and installation of the liquid extraction needle, further, the liquid extraction needle is detachably connected to the liquid extraction tube by a sleeved manner.

[0014] After adopting the above technical solution, the present utility model has the following beneficial effects compared with the prior art:

[0015] In the present utility model, by restricting the upward sliding distance of the piston in the liquid extraction cylinder, the accuracy of the liquid reagent extraction by the pipette is improved to meet the requirement of accurate liquid extraction during drug detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is a sectional view of the liquid extraction cylinder of the present utility model;

[0018] Figure 3 is a partial structural schematic diagram of the present utility model;

[0019] Figure 4 is a sectional view of the liquid extraction cylinder, liquid extraction tube, and piston of the present utility model.

[0020] In the figure: 1. Liquid extraction cylinder; 101. Liquid extraction tube; 102. Scale mark; 103. Holding handle; 104. Piston; 105. Connecting rod; 106. Lifting handle; 2. Liquid extraction needle; 3. Guide block; 301. Fastening ring; 302. Fixed bolt; 303. Measuring rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the purpose, technical solution, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model but are not used to limit the scope of the present utility model.

[0022] Embodiment 1:

[0023] Refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4, A pipette for drug detection, comprising a liquid extraction cylinder 1 and a piston 104 slidably connected in the liquid extraction cylinder 1. Among them, a liquid extraction tube 101 is fixedly communicated with the bottom of the liquid extraction cylinder 1, a scale mark 102 is arranged on the outer wall of the liquid extraction cylinder 1, and the top of the liquid extraction cylinder 1 is open; a fastening ring 301 is sleeved on the liquid extraction cylinder 1; a measuring rod 303 is arranged in a U shape and fixedly connected to the fastening ring 301. Among them, one end of the measuring rod 303 away from the fastening ring 301 is in contact with the upper surface of the piston 104; a locking component is arranged on the fastening ring 301 and is used for locking and limiting the measuring rod 303.

[0024] Guide blocks 3 are symmetrically and fixedly connected to the outer wall of the liquid extraction cylinder 1, and guide grooves are opened on the inner wall of the fastening ring 301. The guide blocks 3 are slidably connected in the guide grooves.

[0025] The locking component includes a fixing bolt 302. Threaded holes are symmetrically opened on the fastening ring 301, the fixing bolt 302 is threadedly connected in the threaded holes, and the fixing bolt 302 abuts against the guide block 3.

[0026] A connecting rod 105 is fixedly connected to the piston 104, a lifting handle 106 is fixedly connected to one end of the connecting rod 105 away from the piston 104, and holding handles 103 are symmetrically and fixedly connected to the upper end of the liquid extraction cylinder 1.

[0027] A liquid extraction needle 2 is detachably connected to the liquid extraction tube 101.

[0028] During use, first insert the liquid extraction needle 2 into the liquid reagent to be aspirated. Then, the operator holds the lifting handle 106 and pulls the connecting rod 105 through the connecting rod 105 to drive the piston 104 to slide upward. At the same time, when the piston 104 slides upward in the liquid extraction cylinder 1, the liquid reagent can be aspirated into the liquid extraction cylinder 1 through the liquid extraction needle 2 and the liquid extraction tube 101;

[0029] When it is necessary to inject the liquid reagent aspirated into the liquid extraction cylinder 1 into the detection container for detection, the operator presses the lifting handle 106. After the lifting handle 106 is pressed, it can push the connecting rod 105 to drive the piston 104 to slide downward. At the same time, when the piston 104 slides downward in the liquid extraction cylinder 1, the liquid reagent inside the liquid extraction cylinder 1 can be discharged into the detection container through the liquid extraction tube 101 and the liquid extraction needle 2 for detection;

[0030] Before aspirating the liquid reagent, the operator can slide the fastening ring 301 on the liquid extraction cylinder 1 to adjust the distance between the measuring rod 303 and the upper surface of the piston 104. During the adjustment process, the distance between the measuring rod 303 and the upper surface of the piston 104 can be accurately adjusted with reference to the scale mark 102, so as to limit the upward sliding distance of the piston 104 in the liquid extraction cylinder 1, improving the accuracy of the pipette for aspirating the liquid reagent and meeting the requirement for accurate aspiration of the liquid during the drug detection process;

[0031] After adjusting the distance between the measuring rod 303 and the upper surface of the piston 104 to an appropriate distance, the operator can rotate the fixing bolt 302 and screw it into the threaded hole until the fixing bolt 302 abuts against the guide block 3, thereby limiting and fixing the fastening ring 301, and preventing the fastening ring 301 from shifting when sucking the liquid reagent, which affects the accuracy of the liquid reagent extraction by the pipette gun.

[0032] Since the top of the liquid extraction cylinder 1 is open, after completing the liquid transfer operation, the operator can move the piston 104 out of the liquid extraction cylinder 1, so as to clean and disinfect the inside of the liquid extraction cylinder 1 to ensure the accuracy and reliability during the next use.

[0033] Embodiment 2:

[0034] Refer to Figure 1 , the pipette gun for drug detection is basically the same as that in Embodiment 1. Further, the liquid extraction cylinder 1 is made of transparent material; when sucking the liquid reagent, through the transparent liquid extraction cylinder 1, it is convenient to observe the suction volume of the liquid reagent through the scale mark 102 on the liquid extraction cylinder 1, and when discharging the liquid reagent from the liquid extraction cylinder 1, it is also convenient to observe the remaining amount of the liquid reagent in the liquid extraction cylinder 1.

[0035] Embodiment 3:

[0036] Refer to Figure 2 , the pipette gun for drug detection is basically the same as that in Embodiment 1. Further, the liquid extraction needle 2 is detachably connected to the liquid extraction tube 101 by means of socket connection; by setting the liquid extraction needle 2 to be detachable, it is convenient for the operator to replace the liquid extraction needle 2 with different lengths according to different specifications of reagent bottles, so that the pipette gun can suck the liquid reagent stored in the reagent bottle through the liquid extraction needle 2.

[0037] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention.

Claims

1. A pipette for drug detection, characterized in that, It includes a liquid extraction cylinder (1) and a piston (104) slidably connected in the liquid extraction cylinder (1). Wherein, a liquid extraction pipe (101) is fixedly communicated with the bottom of the liquid extraction cylinder (1), a scale mark (102) is arranged on the outer wall of the liquid extraction cylinder (1), and the top of the liquid extraction cylinder (1) is open. A fastening ring (301) is sleeved on the liquid extraction cylinder (1). The measuring rod (303) is U-shaped and fixedly connected to the fastening ring (301). Wherein, one end of the measuring rod (303) away from the fastening ring (301) is in contact with the upper surface of the piston (104). A locking component is arranged on the fastening ring (301) and is used for locking and limiting the measuring rod (303).

2. The pipette for drug detection according to claim 1, wherein, Guide blocks (3) are symmetrically and fixedly connected to the outer wall of the liquid extraction cylinder (1), guide grooves are formed in the inner wall of the fastening ring (301), and the guide blocks (3) are slidably connected in the guide grooves.

3. The pipette for drug detection according to claim 2, wherein The locking component includes a fixing bolt (302). Threaded holes are symmetrically formed in the fastening ring (301), the fixing bolt (302) is threadedly connected in the threaded holes, and the fixing bolt (302) abuts against the guide block (3).

4. The pipette for drug detection according to claim 1, wherein A connecting rod (105) is fixedly connected to the piston (104), a lifting handle (106) is fixedly connected to one end of the connecting rod (105) away from the piston (104), and holding handles (103) are symmetrically and fixedly connected to the upper end of the liquid extraction cylinder (1).

5. The pipette for drug detection according to claim 1, characterized in that, The liquid extraction cylinder (1) is transparent.

6. The pipette for drug detection according to claim 1, wherein, A liquid extraction needle (2) is detachably connected to the liquid extraction pipe (101).

7. The pipette for drug detection according to claim 6, characterized in that, The liquid extraction needle (2) is detachably connected to the liquid extraction pipe (101) by a sleeved manner.

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