Pipettor for transferring liquid

Abstract

The utility model discloses a pipettor for transferring liquid, which relates to the technical field of pipettors and comprises a pipettor main body. A threaded groove is formed in the outer surface of the upper end of the pipettor body, a threaded sleeve is spirally mounted on the outer surface of the threaded groove, a compression spring is rotatably mounted on the upper surface of the threaded sleeve, a pressing handle is arranged on the upper surface of the compression spring, and a piston sliding rod is arranged on the surface of the middle of the lower end of the pressing handle. According to the pipettor for liquid transfer, compared with an existing common pipettor, through the arrangement of the threaded sleeve, when quantitative liquid taking needs to be conducted, the piston sliding rod is arranged on the lower end surface of the piston sliding rod, and the piston sleeve is arranged on the lower end surface of the piston sliding rod; the height of the pressing handle is adjusted through screw transmission along the threaded groove formed in the outer surface of the upper end of the pipettor main body, so that the pressing position of the pressing handle is limited, the effect of controlling the liquid taking capacity of the needle every time is achieved, the sampling is more accurate, and the sampling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipettor technical field, concretely is a pipettor for liquid transfer. BACKGROUND

[0002] Pipettor is also called pipette, is a kind of measuring tool in certain range, liquid is removed from the original container to another container, pipettor can be divided into gas piston type pipettor and external piston type pipettor according to principle, it is widely used due to its simple structure, convenient to use and other reasons, it is usually applied in biological, chemical and other fields;

[0003] The existing pipettor, when carrying out quantitative liquid taking, first, the air in the pipettor is discharged by manually pressing and pushing the piston sliding rod to slide, then the needle is vertically inserted into the inside of solution, finally, the liquid is sucked into the inside of the pipettor by pulling the piston sliding rod to generate suction, and then the liquid is manually calibrated and taken, the capacity of liquid taking cannot be accurately controlled by this sampling mode, when carrying out large batch quantitative liquid taking, calibration needs to be continuously carried out, which affects the efficiency of liquid taking.

[0004] Therefore, in view of the above, the existing structure is improved, and a pipettor for liquid transfer is provided. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a pipettor for liquid transfer to solve the problems in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme: a pipettor for liquid transfer, including pipettor main part, the upper end outer surface of pipettort main part is provided with screw groove, and the outer surface of screw groove is spirally installed with screw sleeve, the upper surface of screw sleeve is rotatably installed with compression spring, and the upper surface of compression spring is provided with pressure handle, the lower end middle surface of pressure handle is provided with piston sliding rod, and the piston sliding rod is slidably connected with pipettor main part, and the lower end surface of piston sliding rod is provided with piston sleeve.

[0007] Preferably, the outer surface of the screw sleeve is rotatably installed with a rotating sleeve, and the surface of the rotating sleeve is provided with a hand plate.

[0008] Preferably, the lower end outer surface of the pipettor main body is provided with a threaded ring one, and the outer surface of the threaded ring one is provided with a connecting sleeve.

[0009] Preferably, the lower end inner wall surface of the pipettor main body is slidably installed with a positioning ring, and the lower end surface of the positioning ring is provided with a liquid taking head.

[0010] Preferably, the lower end surface of the liquid taking head is provided with a needle, and the distal end of the needle is provided with an arc shape.

[0011] Preferably, the outer surface of the positioning ring is provided with a placing groove, and the inner surface of the placing groove is provided with a sealing washer.

[0012] Preferably, the outer surface of the liquid taking head is provided with a threaded ring two, and the threaded ring two and the threaded ring one are connected through a connecting sleeve.

[0013] Preferably, the upper surface of the threaded ring two is provided with a magnetic ring, and the magnetic ring and the threaded ring one are connected through magnetic attraction.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1. The utility model discloses a pipette main body, a threaded groove, a threaded sleeve, a compression spring, a pressing handle, a piston slide rod, a piston sleeve, a rotating sleeve and a hand holding plate are arranged, the threaded sleeve is arranged, when quantitative liquid taking is needed, the height is adjusted through the screw transmission along the threaded groove arranged on the outer surface of the upper end of the pipette main body, the pressing position of the pressing handle is limited, the effect that the liquid taking capacity of the needle is controlled each time is achieved, the sampling is more accurate, and the sampling efficiency is improved, the compression spring is arranged, after the needle enters the inside of the solution, the automatic liquid taking is completed through the reset of the pressing handle, and the manual sampling time is reduced.

[0016] 2. The utility model discloses a threaded ring one, a connecting sleeve, a liquid taking head, a positioning ring, a placing groove, a sealing washer, a threaded ring two, a magnetic ring and a needle are arranged, through the setting of the magnetic ring, when the liquid taking head and the pipette main body are fixedly installed or removed, a simple fixing effect can be achieved, and the liquid taking head is prevented from falling and being damaged, through the setting of the connecting sleeve, the pipette main body and the liquid taking head can be quickly connected in a screwing mode, when different models of liquid taking heads are used, the liquid taking head can be quickly disassembled and assembled, and the working efficiency is improved. DRAWINGS

[0017] Figure 1 It is the whole three-dimensional structure schematic diagram of the utility model;

[0018] Figure 2 It is the three-dimensional structure schematic diagram of the threaded sleeve of the utility model;

[0019] Figure 3 It is the three-dimensional structure schematic diagram of the needle of the utility model;

[0020] Figure 4 It is the three-dimensional structure schematic diagram of the needle of the utility model; Figure 3 It is the three-dimensional structure schematic diagram of the needle of the utility model;

[0021] In the figure: 1, pipette main body; 101, threaded groove; 2, threaded sleeve; 201, compression spring; 202, pressing handle; 203, piston slide rod; 204, piston sleeve; 3, rotating sleeve; 301, hand plate; 4, threaded ring one; 401, connecting sleeve; 402, liquid taking head; 403, positioning ring; 404, placing groove; 405, sealing washer; 406, threaded ring two; 407, magnetic attraction ring; 408, needle. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] As shown in the figure, a liquid transfer pipette comprises a pipette main body 1, the upper end outer surface of the pipette main body 1 is provided with a threaded groove 101, and the outer surface of the threaded groove 101 is spirally provided with a threaded sleeve 2. The advantage of this arrangement is that when quantitative liquid taking is required, the threaded sleeve 2 is used for height adjustment through spiral transmission along the threaded groove 101 arranged on the upper end outer surface of the pipette main body 1 to limit the pressing position of the pressing handle 202, thereby achieving the effect of controlling the liquid taking capacity of the needle 408 each time, making the sampling more accurate and improving the sampling efficiency. Figures 1-2

[0024] Further, the upper surface of the threaded sleeve 2 is rotatably provided with a compression spring 201, and the upper surface of the compression spring 201 is provided with a pressing handle 202. The advantage of this arrangement is that after the needle 408 enters the inside of the solution, the compression spring 201 can be used to drive the pressing handle 202 to reset to complete automatic liquid taking, thereby reducing the time for manual sampling.

[0025] Further, the lower end middle surface of the pressing handle 202 is provided with a piston slide rod 203, the piston slide rod 203 and the pipette main body 1 are in sliding connection, and the lower end surface of the piston slide rod 203 is provided with a piston sleeve 204. This arrangement has the same working principle as the liquid taker of the existing device.

[0026] Further, the outer surface of the threaded sleeve 2 is rotatably provided with a rotating sleeve 3, and the surface of the rotating sleeve 3 is provided with a hand plate 301. The advantage of this arrangement is that the rotating sleeve 3 can be used to drive the hand plate 301 to rotate, thereby facilitating the sampling of the pipette main body 1.

[0027] As shown in the figure, a liquid transfer pipette comprises a pipette main body 1, the upper end outer surface of the pipette main body 1 is provided with a threaded groove 101, and the outer surface of the threaded groove 101 is spirally provided with a threaded sleeve 2. The advantage of this arrangement is that when quantitative liquid taking is required, the threaded sleeve 2 is used for height adjustment through spiral transmission along the threaded groove 101 arranged on the upper end outer surface of the pipette main body 1 to limit the pressing position of the pressing handle 202, thereby achieving the effect of controlling the liquid taking capacity of the needle 408 each time, making the sampling more accurate and improving the sampling efficiency. Figures 3-4 ​As shown, the lower end outer surface of the pipette body 1 is provided with a threaded ring one 4, and the outer surface of the threaded ring one 4 is provided with a connecting sleeve 401. The advantage of this arrangement is that the connecting sleeve 401 can be used to quickly connect the pipette body 1 and the liquid taking head 402 in a screwing manner. Different models of liquid taking heads 402 can be quickly disassembled and assembled, improving work efficiency.

[0028] Further, the lower end inner wall surface of the pipette body 1 is slidingly installed with a positioning insert ring 403, and the lower end surface of the positioning insert ring 403 is provided with the liquid taking head 402. The advantage of this arrangement is that the positioning insert ring 403 can assist in positioning and installing the liquid taking head 402, avoiding tilting during installation.

[0029] Further, the lower end surface of the liquid taking head 402 is provided with a needle 408, and the distal end of the needle 408 is provided with an arc shape. The advantage of this arrangement is that the arc-shaped needle 408 can be used to take liquid from small-mouth containers such as narrow-neck bottles and ampoule bottles in chemical experiments. The bending angle allows the needle 408 to better fit the shape of the container and accurately access the liquid, reducing the difficulty of taking liquid and reducing liquid residue.

[0030] Further, the outer surface of the positioning insert ring 403 is provided with a placement groove 404, and the inner surface of the placement groove 404 is installed with a sealing gasket 405. The advantage of this arrangement is that the sealing gasket 405 can ensure the sealing effect between the liquid taking head 402 and the pipette body 1.

[0031] Further, the outer surface of the liquid taking head 402 is provided with a threaded ring two 406, and the threaded ring two 406 and the threaded ring one 4 are spirally fixedly connected through the connecting sleeve 401. The upper surface of the threaded ring two 406 is provided with a magnetic ring 407, and the magnetic ring 407 and the threaded ring one 4 are magnetically connected. The advantage of this arrangement is that the magnetic ring 407 can be used to fix or disassemble the liquid taking head 402 and the pipette body 1, avoiding damage caused by falling of the liquid taking head 402.

[0032] Working principle: when using the liquid transfer pipette, first, the liquid taking head 402 with the positioning ring 403 is inserted into the lower end inner surface of the pipette body 1, then the screw ring one 4 and the screw ring two 406 are magnetically connected through the magnetic ring 407 to temporarily fix the liquid taking head 402, finally the needle 408 is installed by fixing and connecting the screw ring one 4 and the screw ring two 406 through the connecting sleeve 401; when quantitative liquid taking is needed, first, the height is adjusted by screwing the threaded sleeve 2 along the threaded groove 101 arranged on the upper end outer surface of the pipette body 1, then the air in the pipette body 1 is discharged by pressing the pressure handle 202 to press the piston slide rod 203 and the piston sleeve 204 to slide, finally the needle 408 is inserted into the liquid and the pressure handle 202 is slowly released, due to the reset characteristic of the compression spring 201, the piston sleeve 204 is reset to suck the quantitative liquid into the pipette body 1. This is the working principle of the liquid transfer pipette.

Claims

1. A liquid transfer pipette comprising a pipette body (1), characterized in that, The outer surface of the upper end of the pipette body (1) is provided with a threaded groove (101), and the outer surface of the threaded groove (101) is spirally provided with a threaded sleeve (2), the upper surface of the threaded sleeve (2) is rotatably provided with a compression spring (201), the upper surface of the compression spring (201) is provided with a pressing handle (202), the lower end of the middle surface of the pressing handle (202) is provided with a piston sliding rod (203), the piston sliding rod (203) and the pipette body (1) are slidably connected, and the lower end surface of the piston sliding rod (203) is provided with a piston sleeve (204).

2. A pipette for liquid transfer according to claim 1, wherein The outer surface of the threaded sleeve (2) is rotatably provided with a rotating sleeve (3), and the surface of the rotating sleeve (3) is provided with a hand plate (301).

3. The pipette of claim 1, wherein, The outer surface of the lower end of the pipette body (1) is provided with a threaded ring one (4), and the outer surface of the threaded ring one (4) is provided with a connecting sleeve (401).

4. The pipette of claim 1, wherein, The inner wall surface of the lower end of the pipette body (1) is slidably provided with a positioning insert ring (403), and the lower end surface of the positioning insert ring (403) is provided with a liquid taking head (402).

5. A pipette for liquid transfer according to claim 4, wherein, The lower end surface of the liquid taking head (402) is provided with a needle (408), and the tip of the needle (408) is arc-shaped.

6. A pipette for liquid transfer according to claim 4, wherein The outer surface of the positioning insert ring (403) is provided with a placing groove (404), and the inner surface of the placing groove (404) is provided with a sealing washer (405).

7. A pipette for liquid transfer according to claim 4, wherein The outer surface of the liquid taking head (402) is provided with a threaded ring two (406), and the threaded ring two (406) and the threaded ring one (4) are spirally fixedly connected through the connecting sleeve (401).

8. A pipette for liquid transfer according to claim 7, wherein, The upper surface of the threaded ring two (406) is provided with a magnetic attraction ring (407), and the magnetic attraction ring (407) and the threaded ring one (4) are magnetically connected.

Images