CN202570211U - Adjustable quantitative liquid transferring device for chemical laboratory - Google Patents

Abstract

An adjustable quantitative liquid pipetting device used in a chemical laboratory relates to an adjustable quantitative liquid pipetting device. The utility model solves the problem that the existing laboratory adjustable quantitative pipette has a small amount of single pipetting in the process of pipetting, and it needs multiple operations to complete a large amount of pipetting, which brings inconvenience to the operator. Repeated pipetting is likely to cause inaccurate pipetting volume. One end of the first plug of the utility model is fixedly connected with the lower end of the plunger device, the other end of the first plug is set in the first sleeve fixed to the lower end of the first cylindrical plug, and the second cylindrical plug is set on the cylindrical tube , the second cylindrical plug is fixed on the passage opening of the supporting bracket, one end of the plunger rod is fixed on one side of the plunger device, the other end of the plunger rod slides through the cylindrical tube and is fixed on the second plug rod, The second sleeve is fitted on the second plunger, and the second sleeve is affixed to the lower end of the second plunger. The volume ratio of the second sleeve to the first sleeve is 3:1. The utility model is used in the liquid pipetting process of the chemical laboratory.

Description

An adjustable quantitative pipetting device for chemical laboratory

technical field

The utility model relates to an adjustable quantitative liquid pipetting device, in particular to an adjustable quantitative liquid pipetting device used in a chemical laboratory.

Background technique

The pipette is a liquid-taking device that can be adjusted freely within a certain capacity range. The principle is: use the linear movement of the special internal piston in the piston cylinder to change the internal volume of the piston cylinder, so as to realize the suction or discharge of liquid , to achieve the purpose of quantitative transfer of liquid. People use this principle to invent many pipettes, among which the adjustable pipette is to change the position of the stop point of the piston by adjusting the device to realize the change of the volume of the piston cylinder, and use the action of the primary spring force to make the piston return to the initial state. Position, due to long-term use of this pipette, the stress of the spring is not good, resulting in inaccurate pipetting. At the same time, the spring is also prone to rust, which shortens the service life of the spring. In order to overcome the above-mentioned shortcoming, the pipette disclosed in the patent No. 2011200541945, the date of application is March 3, 2011, and the patent name is "adjustable quantitative pipette for laboratory use" cancels the design of the spring, but The existing adjustable quantitative pipette for this laboratory has a small amount of single pipetting during the pipetting process, and requires multiple operations to complete a large amount of pipetting, which brings inconvenience to the operator. At the same time, multiple pipetting It is easy to cause inaccurate pipetting volume.

Contents of the invention

The purpose of this utility model is to solve the problem that the existing laboratory adjustable quantitative pipette has a small amount of single pipetting during the pipetting process, and multiple operations are required to complete a large amount of pipetting, which brings inconvenience to the operator. At the same time, the problem of inaccurate pipetting volume is easily caused by repeated pipetting, and an adjustable quantitative pipetting device for chemical laboratories is provided.

The technical scheme of the utility model is: an adjustable quantitative liquid pipetting device used in a chemical laboratory includes a solution bottle, a plunger, a columnar ruler, a first pipette, a bottle cap, a first sleeve, a first inlet Liquid one-way valve, one-way output valve, first plug, push-pull handle, vernier and snap ring, the bottle cap is installed on the solution bottle, the first columnar plug is fixed on the lower end of the bottle cap, and the plunger slides in sequence Pass through the bottle cap and the first plunger plug to be arranged in the solution bottle, one end of the first plug rod is fixedly connected with the lower end of the plunger device, and the other end of the first plug rod is arranged on the first plug fixed with the lower end of the first plug plug. In the casing, and in a clearance fit with the inner wall of the first casing, the lower end of the first casing has a first liquid inlet, the first liquid inlet is provided with a first liquid inlet check valve, and the first pipette One end of the first pipette is connected to the lower end of the first sleeve, and the other end of the first pipette extends to the outside of the solution bottle through the bottle cap. The first pipette is provided with a one-way output valve, and the top of the plunger is provided with a push-pull valve. Handle, one side of the push-pull handle is provided with a vernier, the vernier and the cylindrical ruler fixed on the bottle cap are overlapped at right angles to each other, the snap ring is set on the cylindrical ruler, and the scale of the cylindrical ruler is consistent with the scale of the first sleeve. The adjustable quantitative pipetting device also includes a second sleeve, a second liquid inlet check valve, a second plunger, a plunger rod, a second pipette, a hose clamp, a support bracket and a cylindrical tube, the second There is a second liquid inlet at the lower end of the two casing pipes, the second liquid inlet check valve is arranged in the second liquid inlet, the supporting frame is fixed in the solution bottle, the second columnar plug is set on the columnar tube, and the second The plunger plug is fixed on the passage opening of the supporting frame, one end of the plunger rod is fixed on one side of the plunger device, the other end of the plunger rod slides through the cylindrical tube and is fixed to the second plug rod, and the second set The tube is set on the second plug, and there is a gap fit between the second sleeve and the second plug, the second sleeve is fixedly connected to the lower end of the second cylindrical plug, and one end of the second pipette is connected to the second set. The lower part of the tube is connected, the other end of the second pipette is connected with the first pipette, the hose clamp is set on the second pipette, and the volume ratio of the second sleeve to the first sleeve is 3:1 .

Compared with the prior art, the utility model has the following effects: 1. The utility model uses two casing pipes to pipette at the same time, and the pipetting volume is large, which effectively solves the problem that the single pipetting volume in the pipetting process is small and requires more A large amount of pipetting can be completed in one operation, which brings inconvenience to the operator. 2. The utility model is easy to operate. Not only can the two cannula pipette liquid at the same time, but also the volume between the two cannula tubes is directly proportional, which is convenient for accurate liquid pipetting.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Specific embodiment one: this embodiment is described in conjunction with Fig. 1, and this embodiment comprises solution bottle 1, plunger device 2, columnar ruler 3, first pipette 4, bottle cap 5, first sleeve pipe 6, first inlet Liquid one-way valve 8, one-way output valve 9, first plug 10, push-pull handle 11, vernier 12, snap ring 13, second sleeve 14, second liquid inlet one-way valve 15, second plug 16 , plunger rod 17, second pipette 18, hose clamp 19, support fixed frame 21 and columnar tube 22, bottle cap 5 caps are contained on the solution bottle 1, and the first columnar plug is fixed on the lower end of bottle cap 5 , the plunger device 2 slides through the bottle cap 5 and the first columnar stopper in the solution bottle 1 in sequence, one end of the first plug post 10 is affixed to the lower end of the plunger device 2, and the other end of the first plug post 10 is set In the first casing 6 fixedly installed with the lower end of the first columnar plug, and in clearance fit with the inner wall of the first casing 6, the lower end of the first casing 6 is provided with a first liquid inlet 7, the first liquid inlet The mouth 7 is provided with a first liquid inlet check valve 8, one end of the first pipette 4 is connected to the lower end of the first sleeve 6, and the other end of the first pipette 4 extends through the bottle cap 5 to the solution bottle 1, the first pipette 4 is provided with a one-way output valve 9, the top of the plunger 2 is provided with a push-pull handle 11, one side of the push-pull handle 11 is provided with a vernier 12, and the vernier 12 is fixed on the bottle. The columnar ruler 3 on the cover 5 overlaps each other at right angles, the snap ring 13 is arranged on the columnar ruler 3, the scale of the columnar ruler 3 is consistent with the scale of the first sleeve 6, and the lower end of the second sleeve 14 is provided with a second inlet. The liquid port 20, the second liquid inlet one-way valve 15 is arranged in the second liquid inlet 20, the supporting frame 21 is fixed in the solution bottle 1, the second columnar plug is sleeved on the columnar tube 22, and the second columnar plug is fixed Installed on the passage opening of the supporting fixture 21, one end of the plunger rod 17 is fixed on one side of the plunger device 2, and the other end of the plunger rod 17 slides through the cylindrical tube 22 and is fixed to the second plunger 16, The second sleeve 14 is sleeved on the second plunger 16, and there is a clearance fit between the second sleeve 14 and the second plunger 16, the second sleeve 14 is affixed to the lower end of the second plunger, and the second displacement One end of liquid pipe 18 is connected with the bottom of second sleeve pipe 14, and the other end of second pipette 18 is connected with first pipette 4, and hose clamp 19 is arranged on the second pipette 18, and the second The volume ratio of the sleeve 14 to the first sleeve 6 is 3:1, and the plunger rod 17 is integrated with the plunger 2 .

The working process of the present utility model is:

1. Small volume pipetting (the pipetting volume is less than 10ml):

First, make the hose clamp 19 on the second pipette 18 in a closed state, and at the same time, take out the second liquid inlet check valve 15; then, set the position of the snap ring 13 according to the demand, and extract the push-pull handle 11 upwards, Until the clasp 13 is provided, the solution enters the first sleeve 6; finally, the push-pull handle 11 is pushed to transfer the liquid to be pipetted to other containers through the first pipette 4 .

2. Small volume pipetting (the pipetting volume is greater than 10ml):

First, make the hose clamp 19 on the second pipette 18 in an open state, and at the same time, put the second liquid inlet check valve 15 into it; then, calculate the scale value of the required liquid amount on the column ruler 3 in proportion, Fix the snap ring 13 at the corresponding position, extract the push-pull handle 11 upward until the snap ring 13 is set, and the solution enters the first sleeve 6 and the second sleeve 14 respectively; finally, push the push-pull handle 11 The liquid to be pipetted in the first sleeve 6 and the second sleeve 14 is transferred to other containers through the first pipette 4 and the second pipette 18 .

Claims (2)

1. An adjustable quantitative pipetting device used in a chemical laboratory, which includes a solution bottle (1), a plunger (2), a column ruler (3), a first pipette (4), a bottle cap ( 5), the first casing (6), the first liquid inlet one-way valve (8), one-way output valve (9), the first plunger (10), the push-pull handle (11), the vernier (12) and The snap ring (13), the bottle cap (5) is mounted on the solution bottle (1), the first columnar plug is fixed on the lower end of the bottle cap (5), and the plunger (2) slides through the bottle cap (5) in sequence ) and the first plug are set in the solution bottle (1), one end of the first plug (10) is affixed to the lower end of the plunger (2), and the other end of the first plug (10) is set at the bottom of the first plug (10). The lower end of a columnar plug is fixed in the first casing (6), and is in clearance fit with the inner wall of the first casing (6). The lower end of the first casing (6) has a first liquid inlet (7) , the first liquid inlet (7) is provided with a first liquid inlet check valve (8), one end of the first pipette (4) is connected to the lower end of the first sleeve (6), and the first pipette The other end of (4) extends to the outside of the solution bottle (1) through the bottle cap (5). The first pipette (4) is provided with a one-way output valve (9), and the top of the plunger (2) A push-pull handle (11) is provided, and a vernier ruler (12) is arranged on one side of the push-pull handle (11). The clasp (13) is set on the cylindrical ruler (3), and the scale of the cylindrical ruler (3) is consistent with the scale of the first sleeve (6). It is characterized in that: the adjustable quantitative pipetting device also includes a second set of Tube (14), second liquid inlet check valve (15), second plunger (16), plunger rod (17), second pipette (18), hose clamp (19), support bracket (21) and columnar tube (22), the lower end of the second sleeve (14) has a second liquid inlet (20), and the second liquid inlet check valve (15) is set at the second liquid inlet (20) Inside, the supporting bracket (21) is fixed in the solution bottle (1), the second columnar plug is set on the columnar tube (22), and the second columnar plug is fixedly installed on the passage port of the supporting bracket (21). One end of the plunger rod (17) is fixed on one side of the plunger device (2), and the other end of the plunger rod (17) slides through the cylindrical tube (22) and is fixed to the second plunger (16). The sleeve (14) is set on the second plunger (16), and there is a clearance fit between the second sleeve (14) and the second plunger (16), and the second sleeve (14) and the second plunger The lower end of the second pipette (18) is connected to the lower part of the second sleeve (14), and the other end of the second pipette (18) is connected to the first pipette (4), The hose clamp (19) is set on the second pipette (18), and the volume ratio of the second sleeve (14) to the first sleeve (6) is 3:1. 2. An adjustable quantitative pipetting device for chemical laboratories according to claim 1, characterized in that: the plunger rod (17) is integrated with the plunger device (2).

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