Pre-stored liquid suction and dilution device and liquid suction and dilution method thereof

Abstract

The invention discloses a pre-storage type liquid suction and dilution device and a liquid suction and dilution method thereof. The pre-storage type liquid suction and dilution device comprises a liquid drainage air bag, a communicating pipe, an external connecting sleeve, a liquid storage assembly, a rotary knob and a liquid suction pipe. Diluent is pre-stored in the built-in liquid storage pipe with two closed ends, when liquid suction and dilution need to be carried out, a rotary knob is rotated, so that an upper closing cover and a lower closing cover at the two ends of the built-in liquid storage pipe move away from each other, and then a plurality of ventilation and liquid drainage channels in the upper closing cover and the lower closing cover are opened; the drainage air bag, the communicating pipe, the upper sealing telescopic pipe, the upper sealing cover, the built-in liquid storage pipe, the lower sealing cover, the lower sealing telescopic pipe and the liquid suction pipe are sequentially communicated from top to bottom, so that diluent in the built-in liquid storage pipe can be released, meanwhile, the drainage air bag can be extruded for liquid drainage, and convenient liquid suction and dilution operation is achieved.

Description

Technical Field

[0001] The invention belongs to a liquid collecting device in the field of biochemistry, and in particular relates to a pre-stored liquid aspirating and diluting device and a liquid aspirating and diluting method thereof. Background Art

[0002] In the prior art, it is often necessary to dilute samples in biological and chemical experiments. In the prior art, a pipette is generally used to first measure the diluent, then measure the sample, add the sample to the diluent, mix well, and then absorb the diluent. The operation is step-by-step, cumbersome, and wastes experimental consumables. In order to improve the convenience of collection and dilution, the diluent is generally pre-stored in a glass tube, and the glass tube is pre-placed in a collection tube. In actual use, it is generally necessary to break the upper and lower ends of the glass tube so as to perform integrated liquid aspiration and dilution. However, such a structure is inconvenient when the upper and lower ends of the glass tube are broken, and it is easy for glass chips to enter the diluent. Therefore, it is necessary to improve the traditional structure to improve the convenience of liquid collection and dilution. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention solves the problem of providing a pre-stored liquid aspiration and dilution device and a liquid aspiration and dilution method thereof which are convenient for liquid collection and dilution operations.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows: A pre-stored liquid suction and dilution device comprises a liquid discharge airbag, a connecting tube, an external connection sleeve, a liquid storage component, a knob, and a liquid suction tube; a connecting tube is installed at the bottom of the liquid discharge airbag; the lower end of the connecting tube is connected to the external connection sleeve on all sides; the middle of the lower end of the external connection sleeve is connected to the liquid suction tube; the liquid storage component is installed inside the external connection sleeve; the liquid storage component comprises an upper closing cover, a lower closing cover, a built-in liquid storage tube, an upper sealed telescopic tube, and a lower sealed telescopic tube; the built-in liquid storage tube is installed in the middle of the internal part of the external connection sleeve, and a diluent is stored in the built-in liquid storage tube; upper closing covers are installed at the upper and lower ends of the built-in liquid storage tube, respectively. The upper and lower closure covers are connected to the connecting tube via upper sealed telescopic tubes on all sides of the upper closure cover; the lower closure cover is connected to the upper end of the liquid suction tube via lower sealed telescopic tubes; multiple ventilation and drainage channels are arranged around the upper and lower closure covers; the knob is installed at the upper end of one side of the external connecting sleeve, and the knob is rotated to drive the upper and lower closure covers to move away from the built-in liquid storage tube, and open multiple ventilation and drainage channels on the upper and lower closure covers, so that the drainage airbag, the connecting tube, the upper sealed telescopic tube, the upper closure cover, the built-in liquid storage tube, the lower closure cover, the lower sealed telescopic tube, and the liquid suction tube are connected in sequence from top to bottom.

[0005] Furthermore, an upper pressure convexity is provided on the lower side of the upper closing cover, and the ventilation and drainage channel passes through the upper closing cover and the upper pressure convexity up and down; a lower pressure convexity is provided on the upper side of the lower closing cover, and the ventilation and drainage channel passes through the lower closing cover and the lower pressure convexity up and down; an upper and lower ends of the built-in liquid storage tube are respectively provided with an upper annular step surface and a lower annular step surface; the upper and lower annular step surfaces are both located on the upper and lower inner sides of the built-in liquid storage tube; the upper pressure convexity is inserted and connected to the upper end of the built-in liquid storage tube, the end face of the upper pressure convex is sealed in contact with the upper annular step surface, and the outer sides of the upper pressure convex are sealed in contact with the inner sides of the upper end of the built-in liquid storage tube; the lower pressure convex is inserted and connected to the lower end of the built-in liquid storage tube, the end face of the lower pressure convex is sealed in contact with the lower annular step surface, and the outer sides of the lower pressure convex are sealed in contact with the inner sides of the lower end of the built-in liquid storage tube.

[0006] Furthermore, moving blocks are respectively provided on both sides of the upper closing cover and the lower closing cover, and strip tracks are respectively opened on the upper and lower sides of the inner part of the external connecting sleeve; the moving blocks are respectively slidably engaged on the strip tracks; the lower side of the knob is sequentially connected to two threaded columns with opposite screw teeth, and the threaded columns are respectively rotatably connected in the strip tracks and screwed with the moving blocks.

[0007] Furthermore, a closed ring is provided in the middle of the lower end of the external connecting sleeve, the middle of the closed ring is connected to the upper end of the liquid suction tube, and the lower end of the lower sealing telescopic tube is connected to the upper end of the closed ring around.

[0008] Furthermore, the outer sides of the built-in liquid storage tube are fixedly installed inside the external connecting sleeve through connecting rings.

[0009] Furthermore, a ventilation opening is provided on the side of the pipette.

[0010] Furthermore, a plug sleeve is sleeved on the outside of the lower end of the liquid pipette.

[0011] A method for sucking and diluting a pre-stored liquid sucking and diluting device comprises the following steps: bringing the lower end of a liquid sucking tube into contact with a liquid to be collected to suck the liquid, then turning a knob to separate the end face of an upper pressing protrusion from an upper annular step face, while keeping the outer sides of the upper pressing protrusion in sealed contact with the inner sides of the upper end of a built-in liquid storage tube, and separating the end face of a lower pressing protrusion from a lower annular step face, while keeping the outer sides of the lower pressing protrusion in sealed contact with the inner sides of the lower end of the built-in liquid storage tube, so that the built-in liquid storage tube is opened and ventilated, and the diluent in the built-in liquid storage tube is discharged into the liquid sucking tube, and finally squeezing a liquid discharge airbag to discharge the diluent and the liquid collected in the liquid sucking tube together.

[0012] The beneficial effects of the present invention are as follows: The present invention pre-stores the diluent in a built-in liquid storage tube with closed ends. When liquid dilution needs to be performed by pipetting, the knob is turned to make the upper closing cover and the lower closing cover at the two ends of the built-in liquid storage tube move away from each other, thereby opening a plurality of ventilation and liquid discharge channels on the upper closing cover and the lower closing cover, so that the liquid discharge airbag, the connecting tube, the upper sealed telescopic tube, the upper closing cover, the built-in liquid storage tube, the lower closing cover, the lower sealed telescopic tube, and the liquid pipetting tube are connected in sequence from top to bottom, so that the diluent in the built-in liquid storage tube can be released, and at the same time the liquid discharge airbag can be squeezed to discharge the liquid, thereby realizing a convenient liquid pipetting and dilution operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the longitudinal cross-sectional structure of the present invention.

[0014] Figure 2 It is a structural schematic diagram of the ventilation and liquid discharge configuration achieved after the upper closing cover and the lower closing cover move in the present invention.

[0015] Figure 3 For the present invention Figure 1 Schematic diagram of the structure in the middle.

[0016] Figure 4 For the present invention Figure 2 Schematic diagram of the structure in the middle.

[0017] Figure 5 For the present invention Figure 4 Schematic diagram of the local enlarged structure. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] like Figures 1 to 5As shown, a pre-stored liquid suction and dilution device includes a liquid discharge airbag 1, a connecting tube 2, an external connection sleeve 3, a liquid storage component 4, a knob 5, and a liquid suction tube 6; the connecting tube 2 is installed at the bottom of the liquid discharge airbag 1; the lower end of the connecting tube 2 is connected to the external connection sleeve 3 on all sides; the middle of the lower end of the external connection sleeve 3 is connected to the liquid suction tube 6; the liquid storage component 4 is installed inside the external connection sleeve 3; the liquid storage component 4 includes an upper closing cover 41, a lower closing cover 42, a built-in liquid storage tube 43, an upper sealed telescopic tube 44, and a lower sealed telescopic tube 45; the built-in liquid storage tube 43 is installed in the middle of the external connection sleeve 3, and the built-in liquid storage tube 43 stores diluent; the upper and lower ends of the built-in liquid storage tube 43 are respectively installed with an upper closing cover 41 and a lower closing cover 42. Closed cover 42; the upper end of the upper closed cover 41 is connected to the connecting pipe 2 through the upper sealed telescopic tube 44; the lower closed cover 42 is connected to the upper end of the pipette 6 through the lower sealed telescopic tube 45; a plurality of ventilation and drainage channels 7 are arranged around the upper closed cover 41 and the lower closed cover 42; the knob 5 is installed at the upper end of one side of the external connecting sleeve 3, and the knob 5 is rotated to drive the upper closed cover 41 and the lower closed cover 42 to move away from the built-in liquid storage tube 43, and open the plurality of ventilation and drainage channels 7 on the upper closed cover 41 and the lower closed cover 42, so that the drainage airbag 1, the connecting pipe 2, the upper sealed telescopic tube 44, the upper closed cover 41, the built-in liquid storage tube 43, the lower closed cover 42, the lower sealed telescopic tube 45, and the pipette 6 are connected in sequence from top to bottom.

[0020] like Figures 1 to 5 As shown, in order to close and open the built-in liquid storage tube 43 to discharge the diluent and ventilate the liquid discharge airbag 1, further, an upper pressure protrusion 411 is provided on the lower side of the upper closing cover 41, and the ventilation and liquid discharge channel 7 passes through the upper closing cover 41 and the upper pressure protrusion 411 from top to bottom; a lower pressure protrusion 421 is provided on the upper side of the lower closing cover 42, and the ventilation and liquid discharge channel 7 passes through the lower closing cover 42 and the lower pressure protrusion 421 from top to bottom; the upper and lower ends of the built-in liquid storage tube 43 are respectively provided with an upper annular step surface 431 and a lower annular step surface 432; the upper annular step surface 431 and the lower annular step surface 432 The surfaces 432 are both located on the upper and lower inner sides of the built-in liquid storage tube 43; the upper pressing protrusion 411 is inserted and connected to the upper end of the built-in liquid storage tube 43, the end face of the upper pressing protrusion 411 is sealed and abutted against the upper annular step face 411, and the outer sides of the upper pressing protrusion 411 are sealed and abutted against the inner side faces 433 around the upper end of the built-in liquid storage tube 43; the lower pressing protrusion 421 is inserted and connected to the lower end of the built-in liquid storage tube 43, the end face of the lower pressing protrusion 421 is sealed and abutted against the lower annular step face 432, and the outer sides of the lower pressing protrusion 421 are sealed and abutted against the inner side faces 434 around the lower end of the built-in liquid storage tube 43.

[0021] like Figures 1 to 5As shown, in order to realize the opening and closing connection between the upper closing cover 41 and the lower closing cover 42 and the built-in liquid storage tube 43 and improve the operating convenience of the knob 5, further, the upper and lower sides of the upper and lower closing covers 41 and 42 are respectively provided with moving blocks 8, and the upper and lower sides of the inner part of the external connecting sleeve 3 are respectively provided with strip rails 31; the moving blocks 8 are respectively slidably engaged on the strip rails 31; the lower side of the knob 5 is sequentially connected with two threaded columns 51 with opposite screw threads, and the threaded columns 51 are respectively rotatably connected in the strip rails 31 and threadedly screwed with the moving block 8.

[0022] like Figures 1 to 5 As shown, in order to facilitate the connection of the liquid pipette 6, further, a closed ring 32 is provided in the middle of the lower end of the external connection sleeve 3, and the middle of the closed ring 32 is connected to the upper end of the liquid pipette 6, and the lower end of the lower sealing telescopic tube 45 is connected to the upper end of the closed ring 32. Further, the outer side of the surrounding of the built-in liquid storage tube 43 is fixedly installed inside the external connection sleeve 3 through a connecting ring 435. Further, a ventilation opening 61 is provided on the side of the liquid pipette 6. Further, a plug sleeve 9 is sleeved on the outer side of the lower end of the liquid pipette 6.

[0023] like Figures 1 to 5 As shown, a method for liquid dilution of a pre-stored liquid aspiration and dilution device is provided, and the steps are as follows: the lower end of the liquid pipette 6 is brought into contact with the liquid to be collected to absorb the liquid, and then the knob 5 is rotated to separate the end face of the upper pressing protrusion 411 from the upper annular step face 431, while keeping the outer sides of the upper pressing protrusion 411 sealed and abutted with the inner side faces 433 around the upper end of the built-in liquid storage tube 43, and the end face of the lower pressing protrusion 421 is separated from the lower annular step face 432, while keeping the outer sides of the lower pressing protrusion 421 sealed and abutted with the inner side faces 434 around the lower end of the built-in liquid storage tube 43, so that the built-in liquid storage tube 43 is opened and ventilated, and the diluent inside the built-in liquid storage tube 43 is discharged to the liquid pipette 6, and finally the liquid discharge airbag 1 is squeezed to discharge the diluent and the liquid collected inside the liquid pipette 6 together.

[0024] The present invention pre-stores the diluent in a built-in liquid storage tube 43 with closed ends. When liquid dilution is required, the knob 5 is turned to make the upper closing cover 41 and the lower closing cover 42 at the two ends of the built-in liquid storage tube 43 move away from each other, thereby opening a plurality of ventilation and drainage channels 7 on the upper closing cover 41 and the lower closing cover 42, so that the drainage airbag 1, the connecting tube 2, the upper sealed telescopic tube 44, the upper closing cover 41, the built-in liquid storage tube 43, the lower closing cover 42, the lower sealed telescopic tube 45, and the liquid suction tube 6 are connected in sequence from top to bottom, so that the diluent in the built-in liquid storage tube 43 can be released, and at the same time, the drainage airbag 1 can be squeezed to discharge the liquid, thereby realizing a convenient liquid suction and dilution operation.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pre-stored liquid aspiration and dilution device, characterized in that: It includes a liquid discharge airbag, a connecting pipe, an external connecting sleeve, a liquid storage component, a knob, and a liquid suction tube; a connecting pipe is installed at the bottom of the liquid discharge airbag; the lower end of the connecting pipe is connected to the external connecting sleeve on all sides; the middle of the lower end of the external connecting sleeve is connected to the liquid suction tube; the liquid storage component is installed inside the external connecting sleeve; the liquid storage component includes an upper closing cover, a lower closing cover, a built-in liquid storage tube, an upper sealed telescopic tube, and a lower sealed telescopic tube; the built-in liquid storage tube is installed in the middle of the external connecting sleeve, and a diluent is stored in the built-in liquid storage tube; the upper and lower ends of the built-in liquid storage tube are respectively installed with an upper closing cover and a lower closing cover ; The upper end of the upper closing cover is connected to the connecting tube through the upper sealed telescopic tube; the lower closing cover is connected to the upper end of the pipette tube through the lower sealed telescopic tube; a plurality of ventilation and drainage channels are arranged around the upper and lower closing covers; the knob is installed at the upper end of one side of the external connecting sleeve, and the knob is rotated to drive the upper closing cover and the lower closing cover to move away from the built-in liquid storage tube, and the plurality of ventilation and drainage channels on the upper closing cover and the lower closing cover are opened, so that the drainage airbag, the connecting tube, the upper sealed telescopic tube, the upper closing cover, the built-in liquid storage tube, the lower closing cover, the lower sealed telescopic tube, and the pipette tube are connected in sequence from top to bottom.

2. The pre-stored liquid aspiration and dilution device according to claim 1, characterized in that: An upper pressure convexity is provided on the lower side of the upper closing cover, and the ventilation and drainage channel passes through the upper closing cover and the upper pressure convexity up and down; a lower pressure convexity is provided on the upper side of the lower closing cover, and the ventilation and drainage channel passes through the lower closing cover and the lower pressure convexity up and down; an upper and lower ends of the built-in liquid storage tube are respectively provided with an upper annular step surface and a lower annular step surface; the upper and lower annular step surfaces are both located on the upper and lower inner sides of the built-in liquid storage tube; the upper pressure convexity is inserted and connected to the upper end of the built-in liquid storage tube, the end face of the upper pressure convex is sealed in contact with the upper annular step surface, and the outer sides of the upper pressure convex are sealed in contact with the inner sides of the upper end of the built-in liquid storage tube; the lower pressure convex is inserted and connected to the lower end of the built-in liquid storage tube, the end face of the lower pressure convex is sealed in contact with the lower annular step surface, and the outer sides of the lower pressure convex are sealed in contact with the inner sides of the lower end of the built-in liquid storage tube.

3. The pre-stored liquid aspiration and dilution device according to claim 1, characterized in that: Moving blocks are respectively provided on both sides of the upper closing cover and the lower closing cover, and strip tracks are respectively provided on the upper and lower sides of the inner part of the external connecting sleeve; the moving blocks are respectively slidably engaged on the strip tracks; the lower side of the knob is sequentially connected to two threaded columns with opposite screw teeth, and the threaded columns are respectively rotatably connected in the strip tracks and screwed with the moving blocks.

4. The pre-stored liquid aspiration and dilution device according to claim 1, characterized in that: A closed ring is arranged in the middle of the lower end of the external connection sleeve, the middle of the closed ring is connected to the upper end of the liquid suction tube, and the lower end of the lower sealing telescopic tube is connected to the upper end of the closed ring.

5. The pre-stored liquid aspiration and dilution device according to claim 1, characterized in that: The outer sides of the built-in liquid storage tube are fixedly installed inside the external connection sleeve through a connection ring.

6. The pre-stored liquid aspiration and dilution device according to claim 1, characterized in that: A ventilation opening is arranged on the side of the liquid suction tube.

7. The pre-stored liquid aspiration and dilution device according to claim 1, characterized in that: The lower end of the liquid suction tube is sleeved with a plug sleeve.

8. A method for diluting liquid using a pre-stored liquid dilution device according to claim 2, characterized in that: The steps are as follows: bring the lower end of the pipette into contact with the liquid to be collected to absorb the liquid, then turn the knob to separate the end face of the upper pressing protrusion from the upper annular step face, while keeping the outer sides of the upper pressing protrusion sealed and abutting against the inner sides of the upper end of the built-in liquid storage tube, and separate the end face of the lower pressing protrusion from the lower annular step face, while keeping the outer sides of the lower pressing protrusion sealed and abutting against the inner sides of the lower end of the built-in liquid storage tube, so that the built-in liquid storage tube is opened and ventilated, and the diluent inside the built-in liquid storage tube is discharged into the pipette, and finally squeeze the discharge airbag to discharge the diluent and the liquid collected inside the pipette together.

Images