Suction tube for test reagent
By designing a straw for testing reagents with an annular filter plate and one-way inlet/effluent assembly, the problem of poor filtration effect of existing straws is solved, and better filtration effect and accuracy of experimental data are achieved.
Patent Information
- Application Number
- CN202421217573.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-05-31
AI Technical Summary
After the existing inspection straw absorbs liquid, the filtered lower particles may remain on the filter plate. When the liquid is released, the particles will be released with the reagent, resulting in poor filtration effect and affecting the experimental results.
A straw for testing reagents is designed, including a tube body, a liquid suction bag, an annular filter plate, a liquid inlet assembly and a liquid outlet assembly. By setting up an annular filter plate and a partition plate, the tube body is separated into a liquid storage chamber and a liquid separation chamber, and a one-way inlet and outlet liquid of the liquid is realized through the liquid inlet and outlet assembly to prevent particles from being released with the reagent.
It effectively avoids the release of sedimentation reagent particles or impurities retained on the filter plate with the reagent when the liquid is discharged, achieving a good filtration effect and ensuring the accuracy of the experimental data.
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of reagent testing, in particular to a pipette for testing reagents. Background Art
[0002] In daily experiments, there are many analytical methods that require the use of pipettes. For example, in the acid hydrolysis method, a pipette is needed to add an appropriate amount of ether to mix, let it stand for 10 to 20 minutes until the upper liquid is clear, and then suck out the supernatant. In the experiment here, a pipette is needed to suck out the supernatant. In order to filter the reagents and avoid sucking out the lower particles, most test pipettes will have a filter component inside the test pipette to ensure the accuracy of the test results.
[0003] However, existing test pipettes all use one nozzle to suck and discharge liquid. After sucking liquid, the filter assembly arranged at the bottom of the pipette may leave filtered lower layer particles on the filter plate. When discharging liquid, the particles will be discharged together with the reagent, resulting in poor filtering effect and affecting the experimental results. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides a pipette for testing reagents, which solves the technical problems raised in the above-mentioned background technology.
[0005] To achieve the above purpose, the utility model is implemented by the following technical solutions: a pipette for testing reagents, comprising a tube body and a liquid suction bag, wherein the outer wall of the tube body is provided with scale lines, the liquid suction bag is arranged on the top of the tube body, and further comprises an annular filter plate, a liquid inlet component for one-way liquid inlet, and a liquid outlet component for one-way liquid outlet;
[0006] The annular filter plate is arranged at the bottom of the tube body, a partition is fixedly arranged in the tube body, a liquid outlet pipe is fixedly connected to the center of the partition, the bottom of the liquid outlet pipe is fixedly connected to the annular filter plate, the liquid outlet pipe divides the lower part of the tube body into a liquid inlet cavity and a liquid outlet cavity, the liquid inlet component is arranged in the liquid inlet cavity, and the liquid outlet component is arranged in the liquid outlet cavity.
[0007] Preferably, the liquid inlet assembly includes a plurality of liquid inlet holes, and the plurality of liquid inlet holes are arranged in a circular array on the partition plate. Lifting rods are slidably installed in the plurality of liquid inlet holes, cover plates are fixedly installed on the tops of the plurality of lifting rods, and floating plates are fixedly connected to the bottoms of the plurality of lifting rods.
[0008] Preferably, the diameter of the lifting rod is smaller than the diameter of the liquid inlet hole, and the diameters of the floating plate and the cover plate are both larger than the diameter of the liquid inlet hole.
[0009] Preferably, the liquid outlet component includes a fixed ring, which is fixedly arranged in the liquid outlet cavity, and a plurality of fixed plates are fixedly installed on the inner wall of the fixed ring, and the bottoms of the plurality of fixed plates are fixedly connected with tension springs, and the bottoms of the plurality of tension springs are fixedly connected with sealing plates.
[0010] Preferably, the bottom diameter of the sealing plate is larger than the inner diameter of the fixing ring.
[0011] Preferably, the bottom opening of the tube body is arranged obliquely.
[0012] Beneficial Effects
[0013] The utility model provides a pipette for testing reagents, which has the following beneficial effects:
[0014] 1. By installing a liquid suction bag, the reagent can be sucked into and discharged from the tube body, by installing an annular filter plate, the reagent can be filtered, by installing a partition, the tube body can be divided into an upper portion for storing liquid and a lower portion for inlet and outlet of liquid, by installing a liquid outlet pipe, the tube body can be divided into a liquid inlet cavity and a liquid outlet cavity, by providing a liquid inlet component and a liquid outlet component, the liquid can be controlled to flow in and out in one direction respectively, so that the liquid inlet channel and the liquid outlet channel can be divided into two, and liquid can be inlet and outlet from different channels, which can effectively avoid the precipitation reagent particles or impurities retained on the filter plate from being released together with the reagent when the liquid is discharged, thereby achieving a better filtering effect to ensure the accuracy of the experimental data;
[0015] 2. By opening a liquid inlet hole, liquid can enter the tube body through the liquid inlet hole for storage. By installing a lifting rod, the lifting rod can move in the liquid inlet hole, thereby driving the cover plate and the floating plate to rise and fall to control the opening and closing of the liquid inlet hole. By installing a cover plate, the opening and closing of the liquid inlet hole can be controlled. By installing a floating plate, the floating plate rises under the action of liquid pressure and buoyancy when liquid is inlet, thereby driving the lifting rod and the cover plate to rise together. At this time, the liquid inlet hole is opened, and the liquid can enter the liquid storage cavity above the tube body through the liquid inlet hole. When the liquid is inletted, the cover plate can be driven down under the action of the gravity of the liquid, and the liquid inlet hole is closed at this time, and the liquid will not flow out of the liquid inlet hole.
[0016] 3. A fixing ring is installed to facilitate the installation of a fixing plate, and a fixing plate is installed to facilitate the installation of a tension spring. By installing a tension spring, the extension and contraction of the tension spring can drive the sealing plate to rise and fall, and under the action of the tension spring, the gravity of the liquid itself cannot drive the sealing plate to fall, thereby avoiding cross contamination and unnecessary waste caused by leakage of reagents. By installing a sealing plate, the lifting and lowering of the sealing plate can control whether the liquid can be released. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the internal structure of the utility model;
[0018] Figure 2 for Figure 1 Sectional view of AA in the middle;
[0019] Figure 3 for Figure 1 A magnified schematic diagram of B;
[0020] Figure 4 for Figure 1 A magnified schematic diagram of C in the middle.
[0021] In the figure: 1. tube body; 2. annular filter plate; 3. liquid suction bag; 4. partition; 5. liquid inlet cavity; 6. liquid outlet pipe; 7. liquid inlet hole; 8. lifting rod; 9. floating plate; 10. cover plate; 11. fixing ring; 12. fixing plate; 13. tension spring; 14. sealing plate; 15. liquid outlet cavity. DETAILED DESCRIPTION
[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention, wherein the directional terms such as "upper" and "lower" mentioned herein are as follows: Figure 1 The orientation is used as a reference.
[0023] See also Figure 1-4 The utility model provides a technical solution: a pipette for testing reagents, comprising a tube body 1, a liquid suction capsule 3, the outer wall of the tube body 1 is provided with scale lines, the liquid suction capsule 3 is arranged on the top of the tube body 1, and also comprises an annular filter plate 2, a liquid inlet component for one-way liquid inlet and a liquid outlet component for one-way liquid outlet;
[0024] The annular filter plate 2 is arranged at the bottom of the tube body 1, a partition plate 4 is fixedly arranged in the tube body 1, a liquid outlet pipe 6 is fixedly connected at the center of the partition plate 4, the bottom of the liquid outlet pipe 6 is fixedly connected to the annular filter plate 2, the liquid outlet pipe 6 divides the lower part of the tube body 1 into a liquid inlet chamber 5 and a liquid outlet chamber 15, the liquid inlet assembly is arranged in the liquid inlet chamber 5, the liquid outlet assembly is arranged in the liquid outlet chamber 15, the liquid suction bag 3 is installed, the reagent can be sucked into and discharged from the tube body 1, the annular filter plate 2 is installed to filter the reagent, and the tube body 1 can be divided into The liquid storage chamber is used for storing liquid, and the liquid separation chamber is used for liquid inlet and liquid outlet. The tube body 1 can be divided into a liquid inlet chamber 5 and a liquid outlet chamber 15 by installing a liquid outlet pipe 6. By providing a liquid inlet component and a liquid outlet component, the one-way liquid inlet and one-way liquid outlet can be controlled respectively, so that the liquid inlet channel and the liquid outlet channel can be divided into two, and liquid inlet and liquid outlet from different channels can be realized, which can effectively avoid the sedimentation reagent particles retained in the annular filter plate 2 from being released together with the reagent when the liquid is discharged, thereby achieving a better filtering effect to ensure the accuracy of the experimental data.
[0025] Specifically, the liquid inlet assembly includes a liquid inlet hole 7, the number of the liquid inlet holes 7 is several, and the several liquid inlet holes 7 are arranged in a circular array on the partition 4. Lifting rods 8 are slidably installed in the several liquid inlet holes 7, and the tops of the several lifting rods 8 are fixedly installed with cover plates 10. The bottoms of the several lifting rods 8 are fixedly connected with floating plates 9. By opening the liquid inlet hole 7, the liquid can enter the tube body 1 through the liquid inlet hole 7 for storage. By installing the lifting rod 8, the lifting rod 8 can move in the liquid inlet hole 7, thereby driving the cover plate 10 and the floating plate 9 is raised and lowered to control the opening and closing of the liquid inlet hole 7. The opening and closing of the liquid inlet hole 7 can be controlled by installing a cover plate 10. By installing a float plate 9, the float plate 9 rises under the action of liquid pressure and buoyancy when liquid is introduced, thereby driving the lifting rod 8 and the cover plate 10 to rise together. At this time, the liquid inlet hole 7 is opened, and the liquid can enter the liquid storage cavity above the tube body 1 through the liquid inlet hole 7. When the liquid is introduced, the cover plate 10 can be driven down under the action of the gravity of the liquid, and the liquid inlet hole 7 is closed at this time, and the liquid will not flow out of the liquid inlet hole 7.
[0026] Specifically, the diameter of the lifting rod 8 is smaller than the diameter of the liquid inlet hole 7, and the diameters of the floating plate 9 and the cover plate 10 are larger than the diameter of the liquid inlet hole 7. By setting the diameters of the floating plate 9 and the cover plate 10 to be larger than the diameter of the liquid inlet hole 7, the liquid inlet hole 7 can be blocked.
[0027] Specifically, the liquid outlet component includes a fixed ring 11, which is fixedly arranged in the liquid outlet cavity 15. A plurality of fixed plates 12 are fixedly installed on the inner wall of the fixed ring. The bottoms of the plurality of fixed plates 12 are fixedly connected with tension springs 13. The bottoms of the plurality of tension springs 13 are fixedly connected with sealing plates 14. The fixing ring 11 is installed to facilitate the installation of the fixing plate 12. The fixing plate 12 is installed to facilitate the installation of the tension spring 13. The tension spring 13 is installed so that the extension and contraction of the tension spring 13 can drive the sealing plate 14 to rise and fall. Under the action of the tension spring 13, the gravity of the liquid itself cannot drive the sealing plate 14 to fall, thereby avoiding cross contamination and unnecessary waste caused by leakage of reagents. The sealing plate 14 can be installed so that the lifting and lowering of the sealing plate 14 can control whether the liquid can be released.
[0028] Specifically, the bottom diameter of the blocking plate 14 is larger than the inner diameter of the fixing ring 11 . By setting the bottom diameter of the blocking plate 14 to be larger than the inner diameter of the fixing ring 11 , the liquid outlet channel can be blocked.
[0029] Specifically, the tube opening at the bottom of the tube body 1 is arranged at an angle. By arranging the tube opening at an angle, when the remaining amount of the reagent is small, it is convenient to suck the reagent into the tube body.
[0030] The working principle and use process of the utility model are as follows: when in use, hold the suction tube to absorb the liquid capsule 3, press the suction capsule 3, the suction capsule 3 will be deformed, the bottom of the suction tube is placed in the reagent to be detected, and the suction capsule 3 is released. Under the action of the suction force of the suction capsule 3, the reagent to be detected can be sucked into the tube body 1, and the scale lines on the wall of the tube body 1 are observed. When the reagent passes through the annular filter plate 2, the reagent can be filtered. When the reagent enters the liquid cavity of the tube body 1, the floating plate 9 in the liquid inlet cavity 5 rises under the upward pressure of the liquid and its own buoyancy, which can drive the lifting rod 8 and the cover plate 10 to rise, and the liquid inlet hole 7 is opened. The reagent enters the liquid storage cavity through the liquid inlet hole 7. At this time, the sealing plate 14 in the liquid outlet cavity 15 blocks the liquid outlet channel , the reagent cannot enter the liquid storage cavity from the liquid outlet channel. When the liquid suction bag 3 recovers its deformation, the suction force disappears, and the reagent can no longer enter the tube body 1. All the reagents entering the tube body 1 are stored in the liquid storage cavity. When the reagent needs to be released, the bottom of the tube body 1 is separated from the liquid, and the liquid suction bag 3 is squeezed again. The liquid suction bag 3 is deformed, and under the downward pressure of the liquid, the blocking plate 14 can be driven to descend, the liquid outlet channel is opened, and the liquid is released through the liquid outlet channel. At this time, the cover plate 10 will not be opened under the action of the liquid pressure, so the liquid cannot be discharged through the liquid inlet channel, so that the liquid inlet channel and the liquid outlet channel can be divided into two channels, and the liquid inlet and liquid outlet are respectively carried out, which can ensure the filtering effect of the straw to ensure the accuracy of the test data.
[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A pipette for testing reagents, comprising a tube body (1) and a liquid suction capsule (3), wherein the outer wall of the tube body (1) is provided with scale lines, and the liquid suction capsule (3) is arranged on the top of the tube body (1), characterized in that: It also includes an annular filter plate (2), a liquid inlet assembly for one-way liquid inlet, and a liquid outlet assembly for one-way liquid outlet; The annular filter plate (2) is arranged at the bottom of the tube body (1); a partition plate (4) is fixedly arranged inside the tube body (1); a liquid outlet pipe (6) is fixedly connected to the center of the partition plate (4); the bottom of the liquid outlet pipe (6) is fixedly connected to the annular filter plate (2); the liquid outlet pipe (6) divides the lower part of the tube body (1) into a liquid inlet chamber (5) and a liquid outlet chamber (15); the liquid inlet component is arranged in the liquid inlet chamber (5), and the liquid outlet component is arranged in the liquid outlet chamber (15).
2. A pipette for testing reagents according to claim 1, characterized in that: The liquid inlet assembly comprises a liquid inlet hole (7), the number of the liquid inlet holes (7) is a plurality, the plurality of the liquid inlet holes (7) are arranged in a circular array on the partition (4), a lifting rod (8) is slidably installed in each of the liquid inlet holes (7), a cover plate (10) is fixedly installed on the top of each of the lifting rods (8), and a floating plate (9) is fixedly connected to the bottom of each of the lifting rods (8).
3. A pipette for testing reagents according to claim 2, characterized in that: The diameter of the lifting rod (8) is smaller than the diameter of the liquid inlet hole (7), and the diameters of the floating plate (9) and the cover plate (10) are both larger than the diameter of the liquid inlet hole (7).
4. A pipette for testing reagents according to claim 1, characterized in that: The liquid outlet assembly comprises a fixed ring (11), the fixed ring (11) is fixedly arranged in the liquid outlet cavity, a plurality of fixed plates (12) are fixedly installed on the inner wall of the fixed ring (11), the bottoms of the plurality of fixed plates (12) are fixedly connected to tension springs (13), and the bottoms of the plurality of tension springs (13) are fixedly connected to blocking plates (14).
5. A pipette for testing reagents according to claim 4, characterized in that: The bottom diameter of the blocking plate (14) is greater than the inner diameter of the fixing ring (11).
6. A pipette for testing reagents according to claim 1, characterized in that: The bottom opening of the tube body (1) is arranged in an inclined manner.