CN206356007U - A kind of compound injecting type pipette - Google Patents

Abstract

The utility model discloses a composite injection pipette, which comprises a pipette and a composite syringe. The composite syringe is an injection tube with a circular cross section. The injection tube is provided with a thick piston cavity and a thin piston cavity. The piston chamber is equipped with a thick tube piston and a thick tube push-pull rod connected with the thick tube piston, and the thin piston chamber is equipped with a thin tube piston and a thin tube push-pull rod. . The utility model is easy to operate and convenient to use, improves the efficiency and accuracy of taking liquid by the pipette, thereby improving the accuracy of biochemical experiments, and can accurately control the volume of liquid at the same time, ensuring the safety of experimenters.

Description

A compound injection pipette

technical field

The utility model relates to a chemical experiment appliance, in particular to a composite injection pipette.

Background technique

At present, in biochemical experiments, the ear wash ball is used in conjunction with the pipette. The solution is sucked into the pipette by squeezing the ear wash ball, and then the liquid level is controlled by fingers. Therefore, the volume of inhaled liquid is related to human operation. When the liquid level of the solution does not meet the requirements, it is often necessary to repeat the operation, and it is easy to cause the solution to overflow and hurt the operator due to excessive extrusion of the ear washing ball. Some experimenters use syringes instead of ear wash balls, but during operation, it is difficult to accurately control the liquid level in the pipette because the range of the syringe far exceeds the needs of the pipette.

Contents of the invention

The purpose of this utility model is to provide a compound injection pipette, which can be used in conjunction with the pipette by using the modified compound syringe instead of the ear wash ball, so that the solution can be sucked into the pipette accurately and the liquid level can be adjusted .

In order to solve the above-mentioned technical problems, the utility model is realized through the following technical solutions: a composite injection pipette, including a pipette and a composite syringe. The composite injector is an injection tube with a ring-shaped cross section, and a thick piston cavity and a thin piston cavity are arranged in the injection tube; a thick tube piston and a thick tube push-pull rod connected with the thick tube piston are arranged in the thick piston cavity; The cavity is provided with a thin tube piston and a thin tube push-pull rod connected with the thin tube piston; the top of the injection tube is covered with an annular disc, and the thick tube push-pull rod and the thin tube push-pull rod pass through the annular disc respectively, and the top of the thick tube push-pull rod is provided with a The thick tube push-pull handle is used for pushing and pulling the thick tube piston, and the top of the thin tube push-pull rod is provided with a thin tube push-pull handle for pushing and pulling the thin tube piston. The bottom end of the composite syringe is provided with a syringe composite opening connected to a pipette. The volume of the composite syringe is greater than that of the pipette; the surface of the pipette is provided with a scale mark marking the liquid volume.

The compound opening of the syringe includes a bayonet on the outer edge of the syringe and an inlet of the syringe. The tip of the pipette is sleeved on the inlet of the syringe and fixed by the bayonet on the outer edge of the syringe to achieve a sealed and detachable nested connection between the pipette and the composite syringe.

When using the utility model, the pipette is sealed and connected with the compound syringe first, then the thick tube piston is moved to roughly control the solution volume in the pipette, and then the thin tube piston is moved to accurately control the volume of the solution according to the scale line on the pipette. Take the volume of the solution. Through this method, the required liquid will not be sucked in too much or too little during the experiment.

The utility model is easy to operate and convenient to use, improves the efficiency and accuracy of taking liquid by the pipette, thereby improving the accuracy of biochemical experiments, and can accurately control the liquid at the same time, ensuring the safety of experimenters.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is the composition schematic diagram of the utility model.

Fig. 2 is a partial view of the composite opening of the syringe.

In the figure: 1-Pipet, 2-Graduate line, 3-Syringe compound opening, 31-Syringe outer edge bayonet, 32-Syringe inlet, 4-Compound syringe, 40-Syringe tube, 41-Rough piston cavity, 42-thick tube piston, 43-thick tube push-pull rod, 44-thick tube push-pull handle, 45-thin tube push-pull handle, 46-ring disc, 47-thin tube push-pull rod, 48-thin tube piston, 49-thin piston cavity .

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in FIG. 1 , the composite syringe 4 is an injection tube with a circular cross section, and a thick piston cavity 41 and a thin piston cavity 49 are arranged in the injection tube. Thick piston cavity 41 is provided with thick tube piston 42, the thick tube push-pull rod 43 that links to each other with thick tube piston 42; The top of the injection tube covers the annular disc 46, and the thick tube push-pull rod 43 and the thin tube push-pull rod 47 pass through the annular disc 46 respectively, and the top of the thick tube push-pull rod 43 is provided with a thick tube push-pull handle 44 for pushing and pulling the thick tube piston 42, and A capillary push-pull handle 45 is provided on the top of the push-pull rod 47 for pushing and pulling the capillary piston 48 .

The bottom end of the compound syringe 4 is provided with a compound syringe opening 3 connected to the pipette 1 . The compound syringe opening 3 includes a bayonet 31 on the outer edge of the syringe and a syringe inlet 32 , as shown in FIG. 2 . The top opening of the pipette 1 has the same inner diameter as the outer diameter of the syringe inlet 32, and the same outer diameter as the inner diameter of the outer edge bayonet 31 of the syringe. The top end of the pipette 1 is sheathed on the syringe inlet 32 and fixed by the syringe outer edge bayonet 31 to achieve a sealed and detachable nested connection between the pipette 1 and the composite syringe 4 . The volume of the composite syringe 4 is greater than that of the pipette 1, and the surface of the pipette 1 is provided with a scale mark 2 marking the liquid volume.

When sucking liquid into the pipette 1, first seal the pipette 1 and the composite syringe 4, then pull the thick tube push-pull rod 43 to move upward, and use the negative pressure generated by the composite syringe 4 to make the solution enter the pipette. Inside the liquid pipe 1. When the solution height in the pipette 1 reaches the predetermined height, stop pulling the thick tube push-pull rod 43; Stop moving the thick tube push-pull rod 43 when the scale is 1 to 2 centimeters, then pull the thin tube push-pull rod 47, and accurately control the liquid level height according to the scale line 2, so that it reaches the required requirement. When discharging liquid in other containers, push the thick tube push-pull rod 43 and the thin tube push-pull rod 47, or separate the composite syringe 4 from the pipette 1 to achieve the purpose of discharging liquid.

The pipette 1 can be made into various volumes, preferably 10ml, 25ml, and 30ml volumes.

Claims (2)

1. A composite injection pipette, characterized in that: comprise a pipette and a composite syringe; the composite syringe is an annular injection tube with a cross section, and the injection tube is provided with a thick piston cavity and a thin piston cavity; the thick piston cavity is provided with a thick tube piston and a thick tube push-pull rod connected with the thick tube piston; the thin piston cavity is equipped with a thin tube piston and a thin tube push-pull rod connected with the thin tube piston; the top of the injection tube is covered with a ring The plate, the thick tube push-pull rod and the thin tube push-pull rod pass through the annular disk respectively. The top of the thick tube push-pull rod is provided with a thick tube push-pull handle for pushing and pulling the thick tube piston, and the top of the thin tube push-pull rod is provided with a thin tube push-pull handle for pushing and pulling. thin tube piston; the bottom end of the compound syringe is provided with a compound opening of the syringe connected to the pipette; the volume of the compound syringe is larger than that of the pipette. 2. A composite injection pipette according to claim 1, characterized in that: the compound opening of the syringe includes a bayonet on the outer edge of the syringe and an inlet of the syringe, and the tip of the pipette is sleeved on the inlet of the syringe And it is fixed by the bayonet on the outer edge of the syringe to achieve the sealed and detachable nested connection between the pipette and the composite syringe.