Plugging and opening / closing structure of a closed dilution tube

Abstract

The present invention discloses a plugging and opening / closing structure of a closed dilution tube, which includes a liquid storage airbag, an external sleeve, a bottom plugging sleeve, a liquid sampling tube, and a plugging and opening / closing assembly; the dilution liquid is encapsulated inside the liquid storage airbag of the present invention. When not in use, the conical plug is inserted into the conical plugging channel to achieve closure. At this time, the annular spring is in a compressed state; when it is necessary to dilute the collected specimen, the upper ring sleeve is moved upward, driving the plugging inner core column and the conical plug to move upward, so that the conical plug is disengaged from the conical plugging channel upward. At the same time, the telescopic ring body and the annular spring are stretched and the annular outer shell moves upward. In this way, the liquid storage airbag is communicated with the external sleeve, the bottom plugging sleeve, and the liquid sampling tube, so that the dilution liquid can be squeezed and mixed with the specimen collected in the liquid sampling tube for dilution. The liquid storage airbag can move up and down stably without bending through the support of the annular spring and the annular outer shell. The whole structure is ingeniously designed and convenient to operate.

Description

Technical Field

[0001] The present invention relates to a plugging and opening / closing structure of a closed dilution tube. Background Art

[0002] At present, in the prior art, it is often necessary to dilute samples in biological and chemical experiments. In the prior art, generally a pipette is used to first measure the diluent, and then measure the sample, add the sample to the diluent, mix evenly and then aspirate the diluted solution, which is a step-by-step operation, with cumbersome operation and waste of experimental consumables. For this reason, our company designed a novel integrated sample diluter with the publication number CN 208505741 U and the name of "A Novel Integrated Sample Diluter", in which the diluted solution is pre-stored in an airbag. By breaking the breakable line on the capillary tube, the diluted solution inside the airbag is communicated with the capillary tube. However, in the structure of the above patent, when the capillary tube is broken, sometimes glass debris will be generated, making the diluted solution mixed with glass debris and affecting subsequent inspections. At the same time, the breaking method is not very convenient in actual use. In addition, when processing the breakable line on the capillary tube, due to the small diameter of the capillary tube, the processing difficulty is high and the yield is low. Summary of the Invention

[0003] Aiming at the deficiencies of the above prior art, the problem solved by the present invention is: to provide a plugging and opening / closing structure of a closed dilution tube that can conveniently mix and dilute the diluted solution enclosed in the airbag with the sample.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0005] A plug-in opening and closing structure for a closed dilution tube, comprising a liquid storage airbag, an external sleeve, a bottom plug-in sleeve, a liquid collection tube, and a plug-in opening and closing assembly; the external sleeve is an inverted U-shaped structure; the bottom plug-in sleeve is an annular columnar structure; the upper end of the bottom plug-in sleeve is inserted from the lower end of the external sleeve and abuts against the inner upper side of the external sleeve; a liquid collection tube is plugged in below the bottom plug-in sleeve; a tapered plug-in channel is provided in the middle of the upper end of the external sleeve; a liquid-passing inner cavity is provided in the middle of the interior of the bottom plug-in sleeve; the lower end of the tapered plug-in channel is butt-connected with the liquid-passing inner cavity; a plug-in opening and closing assembly is installed on the upper end of the external sleeve; a liquid storage airbag is installed on the upper end of the plug-in opening and closing assembly; the plug-in opening and closing assembly comprises an upper ring sleeve, a telescopic ring body, an annular spring, an outer convex strip, an annular outer shell, an upper end ring edge, and a plug-in inner core column; an upper ring sleeve is installed around the lower end of the liquid storage airbag; The telescopic ring body is connected between the lower end of the upper ring sleeve and the upper end of the outer sleeve; the outer sides of the upper ring sleeve are connected to the upper ring edge; the lower end of the upper ring edge is connected to the annular shell; an outer convex strip is installed on both sides of the upper end of the outer sleeve; the lower ends of the annular shell are slidably clamped on the outer sides of the outer convex strip; the annular spring is installed in the interior of the annular shell, the lower end of the annular spring abuts the upper end of the outer convex strip, the upper end of the annular spring abuts the lower side of the upper ring edge, and the annular spring is located on the outer sides of the telescopic ring body; the plug-in inner core column is installed in the middle of the interior of the telescopic ring body, the upper end of the plug-in inner core column is connected to the interior of the upper ring sleeve, and the lower end of the plug-in inner core column is provided with a conical plug; the upper ring sleeve moves downward and drives the conical plug to insert into the conical plug-in channel, and the upper ring sleeve moves upward and drives the conical plug to disengage from the conical plug-in channel upward.

[0006] Furthermore, longitudinal sliding grooves are respectively provided on the outer sides of the outer convex strips; longitudinal sliding teeth are respectively provided on both sides of the lower end of the annular shell; and the longitudinal sliding teeth are slidably engaged with the longitudinal sliding grooves up and down.

[0007] Furthermore, both sides of the upper end of the plug-in inner core column are connected to both sides of the inner part of the upper ring sleeve through connecting rods.

[0008] Furthermore, the tapered plug-in channel and the tapered plug both present a tapered structure that is larger at the top and smaller at the bottom.

[0009] Furthermore, a contact ring is provided at the lower end of the bottom plug sleeve; the upper end of the contact ring is contacted with the lower end of the outer sleeve; the interior of the contact ring is provided with a longitudinal through cavity connected to the liquid inner cavity; a strip groove is provided on one side of the bottom of the longitudinal through cavity; the upper end of the liquid collection tube is inserted from the lower end of the contact ring, and strip grooves are distributed on one side of the upper end of the liquid collection tube.

[0010] Further, an annular abutting member is provided on the outer sides of the periphery of the bottom plugging sleeve; the outer sides of the periphery of the annular abutting member abut against the inner walls of the periphery of the outer sleeve.

[0011] Further, a sealing ring is provided on the upper periphery of the bottom plugging sleeve; the upper end of the bottom plugging sleeve abuts against the upper side inside the outer sleeve through the sealing ring.

[0012] Further, the liquid extraction tube is a capillary glass tube.

[0013] The beneficial effects of the present invention are as follows:

[0014] The internal of the liquid storage airbag of the present invention is filled with a diluent. When not in use, the conical plug is inserted into the conical plugging channel to achieve sealing. At this time, the annular spring is in a compressed state; when it is necessary to dilute the collected specimen, the upper ring sleeve is moved upward, driving the plugging inner core column and the conical plug to move upward, so that the conical plug is disengaged from the conical plugging channel upward. At the same time, the telescopic ring body and the annular spring are stretched and the annular outer shell moves upward. In this way, the liquid storage airbag is communicated with the outer sleeve, the bottom plugging sleeve and the liquid extraction tube, so that the diluent can be squeezed and mixed with the specimen collected in the liquid extraction tube for dilution. The liquid storage airbag can move up and down stably without bending through the support of the annular spring and the annular outer shell. The whole structure is ingeniously designed and convenient to operate. Description of the Drawings

[0015] Figure 1 It is a schematic structural view of the conical plug of the present invention plugged downward and disengaged from the conical plugging channel.

[0016] Figure 2 It is a schematic structural view of the conical plug of the present invention disengaged from the conical plugging channel upward.

[0017] Figure 3 For the present invention Figure 1 magnified structural view.

[0018] Figure 4 For the present invention Figure 2 magnified structural view.

[0019] Figure 5 It is a schematic cross-sectional structural view of the abutting ring cylinder of the present invention. Detailed Description of the Invention

[0020] The following further details the content of the present invention with reference to the drawings.

[0021] As Figures 1 to 5As shown, a plug-in opening and closing structure of a closed dilution tube comprises a liquid storage airbag 3, an outer sleeve 1, a bottom plug-in sleeve 2, a liquid collection tube 5, and a plug-in opening and closing assembly 4; the outer sleeve 1 is an inverted U-shaped structure; the bottom plug-in sleeve 2 is an annular columnar structure; the upper end of the bottom plug-in sleeve 2 is inserted from the lower end of the outer sleeve 1 and abuts against the inner upper side of the outer sleeve 1; a liquid collection tube 5 is plugged in below the bottom plug-in sleeve 2; a tapered plug-in channel 21 is provided in the middle of the upper end of the outer sleeve 1; the bottom plug-in sleeve 2 is provided with a liquid-passing cavity in the middle; the lower end of the tapered plug-in channel 21 is connected to the liquid-passing cavity; the upper end of the outer sleeve 1 is installed with a plug-in opening and closing component 4; the upper end of the plug-in opening and closing component 4 is installed with a liquid storage airbag 3; the plug-in opening and closing component 4 includes an upper ring sleeve 41, a telescopic ring body 43, an annular spring 44, an outer convex strip 47, an annular shell 45, an upper end ring edge 42, and a plug-in inner core column 46; the lower end of the liquid storage airbag 3 is installed with an upper ring sleeve 41; the lower end of the upper ring sleeve 41 is installed with an upper ring sleeve 41; A telescopic ring body 43 is connected between the periphery and the upper end of the outer sleeve 1; the outer periphery of the upper ring sleeve 41 is connected to the upper end ring edge 42; the lower end of the upper end ring edge 42 is connected to the annular shell 45; an outer convex strip 47 is installed on both sides of the upper end of the outer sleeve 1; the lower end of the annular shell 45 is slidably connected to the outer side of the outer convex strip 47; the annular spring 44 is installed inside the annular shell 45, the lower end of the annular spring 44 abuts against the upper end of the outer convex strip 47, and the annular spring 44 is The upper end abuts against the lower side of the upper end ring edge 42, and the annular spring 44 is located on the outside of the telescopic ring body 43; the plug-in inner core column 46 is installed in the middle of the inner part of the telescopic ring body 43, and the upper end of the plug-in inner core column 46 is connected to the inside of the upper ring sleeve 41, and the lower end of the plug-in inner core column 46 is provided with a conical plug 462; the upper ring sleeve 41 moves downward and drives the conical plug 462 to be inserted into the conical plug-in channel 21, and the upper ring sleeve 41 moves upward and drives the conical plug 462 to disengage from the conical plug-in channel 21 upward.

[0022] like Figures 1 to 5 As shown, in order to facilitate the stable up and down sliding of the annular shell 45, it is further preferred that the outer side of the outer convex strip 47 is respectively provided with a longitudinal sliding groove 471; the two sides of the lower end of the annular shell 45 are respectively provided with a longitudinal sliding clamping tooth 451; the longitudinal sliding clamping tooth 451 slides up and down and is clamped on the longitudinal sliding groove 471. Further, the upper ends of the plug-in inner core column 46 are respectively connected to the inner sides of the upper ring sleeve 41 through connecting rods 461. Further, the tapered plug-in channel 21 and the tapered plug 462 are both tapered structures with a larger upper part and a smaller lower part.

[0023] like Figures 1 to 5As shown, for the convenience of connecting the bottom socket 2 and the liquid collection tube 5, further, a butt - joint ring cylinder 6 is provided at the lower end of the bottom socket 2; the upper - end periphery of the butt - joint ring cylinder 6 abuts against the lower - end periphery of the outer sleeve 1; a longitudinal through - cavity communicating with the liquid - passing inner cavity is provided inside the butt - joint ring cylinder 6; a strip - shaped slot 61 is provided on one side of the bottom of the longitudinal through - cavity; the upper end of the liquid collection tube 5 is inserted from the lower end of the butt - joint ring cylinder 6, and strip - shaped slots 61 are distributed on one side of the upper end of the liquid collection tube 5.

[0024] As Figures 1 to 5 As shown, for the convenience of the stable insertion of the bottom socket 2 and the outer sleeve 1, further, an annular butt - joint member 22 is provided on the outer side of the periphery of the bottom socket 2; the outer periphery of the annular butt - joint member 22 abuts against the inner wall of the periphery of the outer sleeve 1.

[0025] As Figures 1 to 5 As shown, for improving the sealing performance between the upper end of the bottom socket 2 and the upper side inside the outer sleeve 1, further, a sealing ring is provided on the periphery of the upper end of the bottom socket 2; the upper end of the bottom socket 2 abuts against the upper side inside the outer sleeve 1 through the sealing ring. Further, the liquid collection tube 5 is a capillary glass tube.

[0026] In the liquid - storage airbag 3 of the present invention, a diluent is encapsulated. When not in use, the conical plug 462 is inserted into the conical insertion channel 21 to achieve sealing. At this time, the annular spring 44 is in a compressed state; when specimen dilution is required, the upper ring sleeve 41 is toggled upward, driving the insertion inner core column 46 and the conical plug 462 to move upward, so that the conical plug 462 is disengaged from the conical insertion channel 21 upward. At the same time, the telescopic ring body 43 and the annular spring 44 are stretched and the annular outer shell 45 moves upward. In this way, the liquid - storage airbag 3 is communicated with the outer sleeve 1, the bottom socket 2, and the liquid collection tube 5, so that the diluent can be squeezed and mixed with the specimen collected in the liquid collection tube 5 for dilution. Due to the support of the annular spring 44 and the annular outer shell 45, the liquid - storage airbag 3 can move up and down stably without bending. The whole structure is ingeniously designed and convenient to operate.

[0027] The above - mentioned are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An insertion and opening / closing structure of a closed dilution tube, characterized in that It comprises a liquid storage airbag, an external sleeve, a bottom plug-in sleeve, a liquid collection tube, and a plug-in opening and closing component; the external sleeve is an inverted U-shaped structure; the bottom plug-in sleeve is an annular column structure; the upper end of the bottom plug-in sleeve is inserted from the lower end of the external sleeve and abuts against the inner upper side of the external sleeve; a liquid collection tube is plugged in under the bottom plug-in sleeve; a conical plug-in channel is provided in the middle of the upper end of the external sleeve; a liquid-passing inner cavity is provided in the middle of the interior of the bottom plug-in sleeve; the lower end of the conical plug-in channel is butt-connected and connected with the liquid-passing inner cavity; a plug-in opening and closing component is installed on the upper end of the external sleeve; a liquid storage airbag is installed on the upper end of the plug-in opening and closing component; the plug-in opening and closing component comprises an upper ring sleeve, a telescopic ring body, an annular spring, an outer convex strip, an annular outer shell, an upper end ring edge, and a plug-in inner core column; an upper ring sleeve is installed around the lower end of the liquid storage airbag; four The telescopic ring body is connected between the periphery and the upper end of the outer sleeve; the outer sides of the upper ring sleeve are connected to the upper ring edge; the lower end of the upper ring edge is connected to the annular shell; an outer convex strip is installed on both sides of the upper end of the outer sleeve; the lower end of the annular shell is slidably engaged with the outer sides of the outer convex strip on both sides; the annular spring is installed in the interior of the annular shell, the lower end of the annular spring abuts the upper end of the outer convex strip, the upper end of the annular spring abuts the lower side of the upper ring edge, and the annular spring is located on the outer side of the telescopic ring body; the plug-in inner core column is installed in the middle of the interior of the telescopic ring body, the upper end of the plug-in inner core column is connected to the interior of the upper ring sleeve, and the lower end of the plug-in inner core column is provided with a conical plug; the upper ring sleeve moves downward and drives the conical plug to insert into the conical plug-in channel, and the upper ring sleeve moves upward and drives the conical plug to disengage from the conical plug-in channel upward.

2. The plugging and opening / closing structure of the closed dilution tube according to claim 1, characterized in that, The outer sides of the outer convex strips are respectively provided with longitudinal sliding grooves; the two sides of the lower end of the annular shell are respectively provided with longitudinal sliding teeth; the longitudinal sliding teeth slide up and down and are connected to the longitudinal sliding grooves.

3. The plugging and opening / closing structure of the closed dilution tube according to claim 1, characterized in that, The two sides of the upper end of the plug-in inner core column are respectively connected to the two sides of the inner part of the upper ring sleeve through connecting rods.

4. The plugging and opening / closing structure of the closed dilution tube according to claim 1, characterized in that, The tapered plug-in channel and the tapered plug both present a tapered structure that is larger at the top and smaller at the bottom.

5. The plugging and opening / closing structure of the closed dilution tube according to claim 1, characterized in that, A contact ring is provided at the lower end of the bottom plug sleeve; the upper end of the contact ring is contacted with the lower end of the outer sleeve; a longitudinal through cavity connected to the liquid inner cavity is provided inside the contact ring; a strip groove is provided on one side of the bottom of the longitudinal through cavity; the upper end of the liquid collection tube is inserted from the lower end of the contact ring, and strip grooves are distributed on one side of the upper end of the liquid collection tube.

6. The plugging and opening / closing structure of the closed dilution tube according to claim 1, characterized in that An annular abutment piece is arranged on the outer side of the bottom plug sleeve; the outer side of the annular abutment piece abuts against the inner wall of the outer sleeve.

7. The plugging and opening / closing structure of the closed dilution tube according to claim 1, characterized in that, A sealing ring is arranged around the upper end of the bottom plug-in sleeve; the upper end of the bottom plug-in sleeve abuts against the inner upper side of the outer sleeve through the sealing ring.

8. The plugging and opening / closing structure of the closed dilution tube according to claim 1, characterized in that, The liquid collection tube is a capillary glass tube.

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