CN201565310U - Pipette - Google Patents

Abstract

The utility model provides a pipette comprising a main pipe with scales. The pipette is characterized in that a side pipe with a one-way valve is arranged on one side of the main pipe, and a rubber hose with a glass ball inside is arranged on the main pipe. Since negative pressure can be formed conveniently in the main pipe through a rubber pipette bulb, liquid can be sucked into the main pipe, then under the function of the one-way valve which allows only air discharge but not air charge, the liquid in the main pipe can not automatically flow out of the pipe mouth, and simultaneously pollution to the rubber pipette bulb and the liquid due to the backflow of the liquid in the pipe can also be avoided; and in addition, the rubber hose arranged on the main pipe can be extruded to generate a gap between the rubber hose and the glass ball and to enable air to go into and out of the main pipe via the gap, so as to make micro adjustment to the liquid in the main pipe and accurately control the intake and the outflow of the liquid.

Description

a pipette

technical field

The utility model relates to a pipette, in particular to a liquid pipette, which belongs to the technical field of scientific research and testing.

technical background

At present, most of the pipettes used in experiments are glass tubes that pass through up and down. When in use, insert the ear ball into the nozzle to absorb liquid. When the liquid in the tube is sufficient, remove the ear ball and block the glass nozzle with your fingers. Finger or turn the glass tube to slowly lower the liquid level to the desired position, and then move to the container to be added. During this process, the amount of liquid taken is not easy to control. When the suction ear ball is removed and blocked with fingers, the liquid drops rapidly and easily causes insufficient volume. It is also difficult to adjust excessive liquid by moving fingers or turning the glass tube. Control requires skilled operation. However, if the amount of liquid taken is too much, it is easy for the liquid to be sucked into the ear-absorbing bulb to cause contamination of the ear-absorbing bulb and the liquid.

Contents of the invention

The utility model provides a pipette in order to solve the problem that the existing pipette cannot control the amount of liquid entering and exiting, and is time-consuming and labor-intensive.

The utility model is completed through the following technical solutions: a pipette, including a main pipe with a scale on it, characterized in that a side pipe with a check valve inside is provided on one side of the main pipe, and a glass ball is provided on the main pipe. Rubber hose, so that the liquid can be sucked into the main pipe through the suction ear ball placed on the side pipe port, and then squeeze the rubber hose to create a gap between the rubber hose and the glass ball, so that air can enter and exit through the gap. Therefore, the liquid in the main pipe is slightly adjusted to accurately control the amount of liquid suction.

The side pipe is arranged on the upper part of the main pipe, and there is a one-way valve that opens outwards inside. The port of the side pipe is connected with a commercially available suction ear ball, so that the air in the main pipe can flow out in one direction when the suction ear ball absorbs liquid. , and when the liquid is full, when the suction ear ball is removed, the outside atmosphere cannot enter the main pipe, so the liquid in the main pipe will not flow out automatically.

The lower end of the main pipe is set as a pointed mouth, and the upper end is set as a flat mouth so as to be socketed with a hose with a glass bulb.

The diameter of the glass ball is larger than that of the rubber hose, so that the glass ball can be closely combined with the rubber hose without air leakage.

The utility model has the following advantages and effects: adopting the above scheme, it is convenient to form a negative pressure in the main pipe through the suction ear ball to suck the liquid into the main pipe, and then under the action of the one-way valve that can only discharge air but not enter the air, make the The liquid in the main pipe will not flow out automatically from the nozzle, so that the main pipe can be moved conveniently, and at the same time, the liquid in the pipe will not flow back and pollute the suction ear ball and the liquid itself. In addition, the rubber hose set on the main pipe can be squeezed , to create a gap between the rubber hose and the glass ball, allowing air to enter and exit the main pipe through the gap, so as to make slight adjustments to the liquid in the main pipe to accurately control the liquid intake and liquid outflow. It is an ideal liquid transfer device.

Description of drawings

Fig. 1 is a structural diagram of the utility model.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings, but the content of the utility model is not limited thereto.

As shown in Fig. 1, the pipette provided by the utility model includes a main pipe 1 with a scale 2 on it, and a side pipe 7 with a check valve 8 in it is provided on one side of the main pipe 1 top, and the side pipe 7 port 6 is connected with the market. The rubber hose 3 with the glass ball 4 inside is sleeved on the main pipe 1, the lower end 9 of the main pipe 1 is set as a pointed mouth, and the upper end 5 is set as a flat mouth, and the diameter of the glass ball 4 is larger than that of the rubber hose 3 .

Claims (4)

1. A pipette, comprising a graduated supervisor, is characterized in that one side of the supervisor is provided with a side pipe with a check valve in it, and the supervisor is provided with a rubber hose with glass balls in it. 2. The pipette according to claim 1, wherein the side pipe is arranged on the upper part of the main pipe, and an outwardly opening check valve is arranged inside, and the port of the side pipe is connected with a commercially available suction ear ball. 3. The pipette according to claim 1, characterized in that the lower end of the main tube is set as a sharp mouth, and the upper end is set as a flat mouth. 4. The pipette according to claim 1, characterized in that the diameter of the glass bulb is larger than that of the rubber hose.