Pipette capable of preventing solution pollution

Abstract

The utility model discloses a pipette for preventing solution pollution, which comprises a pipette, the top end of the pipette is provided with an extraction pipe, a connecting pipe is arranged between the pipette and the extraction pipe, the top end and the bottom end of the connecting pipe are fixedly connected with sealing rings, a support seat is arranged below the pipette, and the bottom end of the support seat is fixedly connected with the extraction pipe. A mounting pipe is fixedly connected to the bottom end of the extraction pipe, a piston rod is arranged in the extraction pipe, a push plate is fixedly connected to the top end of the piston rod, and fixing blocks are fixedly connected to the top ends of the two sides of the extraction pipe. According to the pipette capable of preventing solution pollution, the pipette after liquid suction is protected through the protective sleeve, the pipette can be inserted into the protective sleeve after liquid suction, the protective sleeve and the supporting seat protect an inlet of the pipette, external bacteria are prevented from entering the interior of the pipette to cause pollution, and the pipette is prevented from being polluted. By means of the structure, the function of facilitating solution pollution is achieved, and the problem that liquid is prone to pollution is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental equipment, in particular to a liquid transfer pipette capable of preventing solution contamination. Background Art

[0002] Pipette is a common experimental tool. When studying cell biology or molecular biology, experimenters need to use pipette to absorb and transfer the liquid containing cells inside the experimental vessel.

[0003] After searching, it was found that pipettes are divided into many types. Extraction-type pipettes are prone to contamination and leakage during use. First, after the experimenter uses the extraction-type pipette to extract the liquid, if the pipette cannot be transferred in time and the entrance of the pipette is not protected in time, the bacteria in the air will contaminate the liquid inside the extraction-type pipette from the entrance. In addition, since the extraction point of the extraction-type pipette lacks a limiter, leakage is likely to occur once it is accidentally touched or squeezed.

[0004] There is an urgent need for a liquid transfer pipette that prevents solution contamination and solves the technical defects proposed in the above technology. Utility Model Content

[0005] The utility model aims to provide a liquid transfer pipette which can prevent solution from being contaminated, so as to solve the problem that liquid is easily contaminated in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pipette for preventing solution contamination, comprising a pipette, an extraction tube is arranged at the top of the pipette, a connecting tube is installed between the pipette and the extraction tube, a sealing ring is fixedly connected to the top and bottom of the connecting tube, a support seat is arranged below the pipette, a mounting tube is fixedly connected to the bottom end of the extraction tube, a piston rod is arranged inside the extraction tube, a push plate is fixedly connected to the top end of the piston rod, fixed blocks are fixedly connected to the top ends of both sides of the extraction tube, the fixing blocks are movably connected to the limiting rods inside, a screw shaft is arranged at the front end of the fixing block, and an anti-pollution component is arranged inside the support seat;

[0007] The anti-pollution component includes a protective sleeve, which is installed on the top of the support seat, and mounting blocks are fixedly connected to both sides of the top of the support seat, a through hole is provided at the middle position of the top of the support seat, and mounting slots are provided on both sides of the bottom of the protective sleeve, a water absorption groove is provided inside the support seat, and a water absorbent sheet is placed inside the water absorption groove, and reserved grooves are evenly opened at the bottom of the support seat, and positioning suction cups are fixedly connected inside the reserved grooves.

[0008] Preferably, the bottom end of the protective sleeve contacts the top end of the support seat, and the mounting block is embedded in the mounting slot.

[0009] Preferably, the through hole is connected to the water absorption groove, and the bottom end of the protective sleeve is connected to the through hole.

[0010] Preferably, a groove is provided inside the protective cover, and the bottom end of the pipette has the same shape as the groove, and the bottom end of the pipette can be embedded in the groove of the protective cover.

[0011] Preferably, the bottom end of the limiting rod is fixedly connected to the limiting plate, and one end of the screw shaft is fixedly connected to one end of the limiting rod.

[0012] Preferably, the top ends of the mounting tube and the pipette are both provided with external threads, the interior of the connecting tube is provided with a reserved opening, and the inner side of the reserved opening is provided with an internal thread.

[0013] Preferably, the bottom end of the mounting tube and the top end of the pipette are respectively inserted into the top end and the bottom end inside the connecting tube, and the mounting tube and the pipette are threadedly fixed to the connecting tube.

[0014] Preferably, the outside of the connecting tube is provided with anti-slip grooves, and the front end of the pipette is provided with scale lines.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the liquid transfer pipette for preventing solution contamination not only realizes the function of preventing the solution from being contaminated, realizes the function of facilitating position limiting, but also realizes the function of being easy to disassemble and replace;

[0016] By providing a support seat, a protective sleeve, a mounting slot, a water absorption sheet, a water absorption groove, a mounting block and a positioning suction cup, the pipette can be inserted into the interior of the protective sleeve after extracting the liquid, the support seat at the bottom of the protective sleeve can be placed on the table for use, the positioning suction cup at the bottom of the support seat is adsorbed on the table, and then the mounting slot of the protective sleeve is sleeved on the outside of the mounting block, the protective sleeve and the support seat protect the entrance of the pipette to prevent external bacteria from entering the interior of the pipette and causing contamination, and this structure realizes the function of facilitating the solution to be contaminated;

[0017] By setting a limit rod, a push plate, a piston rod, a limit plate, a fixed block and a screw shaft, the extraction tube pulls the piston rod upward to extract the liquid into the pipette. After the extraction is completed, the piston rod remains in the extracted state. At this time, the screw shaft is rotated to rotate the limit rod to a state perpendicular to the push plate. The limit plate on the limit rod can resist the push plate to prevent the piston rod from moving downward. This structure can avoid the problem of pushing the piston rod to squeeze out liquid due to accidental touch or accidental collision. This structure realizes the functions of facilitating limit and preventing overflow.

[0018] By providing a connecting tube, a sealing ring, a mounting tube, anti-slip patterns, external threads and internal threads, the pipette and the extraction tube can be connected through the connecting tube. When in use, it is necessary to first screw the top end of the pipette to the inside of the connecting tube, and then install the connecting tube on the outside of the mounting tube at the bottom of the extraction tube, and also fix it by screwing. The sealing ring on the connecting tube can improve the sealing effect of the connection. When the extraction tube is extracted, the liquid can be sucked into the inside of the pipette by means of pressure difference. When disassembling and replacing, it only needs to be screwed apart. This structure realizes the function of easy disassembly and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the front cross-sectional structure of the support seat of the utility model;

[0021] Figure 3 For the utility model Figure 1 The enlarged structural diagram at A in the middle;

[0022] Figure 4 It is a schematic diagram of the top view structure of the connecting pipe of the utility model.

[0023] In the figure: 1. Support seat; 2. Protective cover; 3. Pipette; 4. Connecting tube; 5. Sealing ring; 6. Extraction tube; 7. Limit rod; 8. Push plate; 9. Piston rod; 10. Limit plate; 11. Mounting tube; 12. Anti-slip pattern; 13. External thread; 14. Scale line; 15. Mounting slot; 16. Water absorbent sheet; 17. Water absorbent groove; 18. Mounting block; 19. Through hole; 20. Positioning suction cup; 21. Reserved slot; 22. Fixing block; 23. Screw shaft; 24. Internal thread; 25. Reserved opening. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1: Please refer to Figure 1-4, a pipette for preventing solution contamination, comprising a pipette 3, an extraction tube 6 is arranged at the top of the pipette 3, a connecting tube 4 is installed between the pipette 3 and the extraction tube 6, a sealing ring 5 is fixedly connected to the top and bottom of the connecting tube 4, a support seat 1 is arranged below the pipette 3, a mounting tube 11 is fixedly connected to the bottom end of the extraction tube 6, a piston rod 9 is arranged inside the extraction tube 6, a push plate 8 is fixedly connected to the top of the piston rod 9, a fixing block 22 is fixedly connected to the top of both sides of the extraction tube 6, the fixing block 22 is movably connected to the limiting rod 7, a screw shaft 23 is arranged at the front end of the fixing block 22, and an anti-pollution component is arranged inside the support seat 1;

[0026] The anti-pollution component includes a protective sleeve 2, which is installed on the top of the support seat 1. The two sides of the top of the support seat 1 are fixedly connected with mounting blocks 18. A through hole 19 is provided at the middle position of the top of the support seat 1. The two sides of the bottom of the protective sleeve 2 are provided with mounting slots 15. The support seat 1 is provided with a water absorption groove 17 inside, and a water absorption sheet 16 is placed inside the water absorption groove 17. The bottom of the support seat 1 is evenly provided with reserved grooves 21, and the reserved grooves 21 are fixedly connected with positioning suction cups 20 inside.

[0027] The bottom end of the protective sleeve 2 contacts the top end of the support seat 1, the mounting block 18 is embedded in the mounting slot 15, the through hole 19 is connected to the water absorption slot 17, the bottom end of the protective sleeve 2 is connected to the through hole 19, a groove is provided inside the protective sleeve 2, the bottom end of the pipette 3 has the same shape as the groove, and the bottom end of the pipette 3 can be embedded in the groove of the protective sleeve 2;

[0028] Specifically, Figure 1 and Figure 2 As shown, after taking the liquid, it can be inserted into the protective sleeve 2, and the support seat 1 at the bottom of the protective sleeve 2 can be placed on the table for use. The positioning suction cup 20 at the bottom of the support seat 1 is adsorbed on the table, and then the mounting slot 15 of the protective sleeve 2 is put on the outside of the mounting block 18. The protective sleeve 2 and the support seat 1 protect the entrance of the pipette 3 to prevent external bacteria from entering the interior of the pipette 3 and causing contamination.

[0029] Embodiment 2: The bottom end of the limiting rod 7 is fixedly connected to the limiting plate 10, and one end of the screw shaft 23 is fixedly connected to one end of the limiting rod 7;

[0030] Specifically, Figure 1 and Figure 3 As shown, the liquid can be extracted into the interior of the pipette 3 by pulling the piston rod 9 upwards. After the extraction is completed, the piston rod 9 remains in the extracted state. At this time, the screw shaft 23 is rotated, and the screw shaft 23 rotates and moves the limit rod 7 to a state perpendicular to the push plate 8. The limit plate 10 on the limit rod 7 can resist the push plate 8 to prevent the piston rod 9 from moving downward. This structure can avoid the problem of pushing the piston rod 9 to squeeze out the liquid due to accidental touch or collision.

[0031] Embodiment 3: The tops of the mounting tube 11 and the pipette 3 are both provided with external threads 13, the interior of the connecting tube 4 is provided with a reserved opening 25, the inner side of the reserved opening 25 is provided with an internal thread 24, the bottom end of the mounting tube 11 and the top end of the pipette 3 are respectively inserted into the top and bottom ends of the interior of the connecting tube 4, the mounting tube 11 and the pipette 3 are threadedly fixed to the connecting tube 4, the exterior of the connecting tube 4 is provided with anti-slip grooves 12, and the front end of the pipette 3 is provided with a scale line 14;

[0032] Specifically, Figure 1 and Figure 4 As shown, when in use, it is necessary to first screw and install the top end of the pipette 3 inside the connecting tube 4, and then install the connecting tube 4 on the outside of the mounting tube 11 at the bottom of the extraction tube 6, and also fix it by screwing. The sealing ring 5 on the connecting tube 4 can improve the sealing effect of the connection. When the extraction tube 6 is extracted, the liquid can be sucked into the inside of the pipette 3 by means of pressure difference. The anti-slip groove 12 on the outside of the connecting tube 4 can improve the protection and stability effect during the screwing process. When disassembling and replacing, you only need to screw it apart.

[0033] Working principle: When the utility model is used, the pipette 3 and the extraction tube 6 need to be installed and connected first, the top of the pipette 3 is screwed and installed inside the connecting tube 4, and then the connecting tube 4 is installed outside the mounting tube 11 at the bottom of the extraction tube 6, and is also fixed by screwing. The sealing ring 5 on the connecting tube 4 can improve the sealing effect of the connection. When the extraction tube 6 is extracted, the liquid can be sucked into the inside of the pipette 3 by means of pressure difference. The piston rod 9 can be pulled upward to extract the liquid into the inside of the pipette 3. After the extraction is completed, the piston rod 9 remains in the extracted state, and the screwing shaft 23 is rotated at this time. The screwing shaft 23 The limit rod 7 is rotated and moved to a state perpendicular to the push plate 8. The limit plate 10 on the limit rod 7 can resist the push plate 8 to prevent the piston rod 9 from moving downward. After the pipette 3 has extracted the liquid, it can be inserted into the interior of the protective sleeve 2. The support seat 1 at the bottom of the protective sleeve 2 can be placed on the table for use. The positioning suction cup 20 at the bottom of the support seat 1 is adsorbed on the table, and then the mounting slot 15 of the protective sleeve 2 is placed on the outside of the mounting block 18. The protective sleeve 2 and the support seat 1 protect the entrance of the pipette 3 to prevent external bacteria from entering the interior of the pipette 3 and causing contamination. This structure realizes the function of facilitating the contamination of the solution.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A pipette for preventing solution contamination, comprising a pipette (3), characterized in that: The top of the pipette (3) is provided with an extraction tube (6), a connecting tube (4) is installed between the pipette (3) and the extraction tube (6), the top and bottom of the connecting tube (4) are fixedly connected with a sealing ring (5), a support seat (1) is provided below the pipette (3), the bottom end of the extraction tube (6) is fixedly connected with a mounting tube (11), a piston rod (9) is provided inside the extraction tube (6), the top of the piston rod (9) is fixedly connected with a push plate (8), the tops of both sides of the extraction tube (6) are fixedly connected with fixed blocks (22), the inside of the fixed block (22) is movably connected with a limit rod (7), the front end of the fixed block (22) is provided with a screw shaft (23), and the inside of the support seat (1) is provided with an anti-pollution component; The anti-pollution component comprises a protective sleeve (2), the protective sleeve (2) being mounted on the top of a support seat (1), the top of the support seat (1) being fixedly connected with mounting blocks (18) on both sides, the top of the support seat (1) being provided with a through hole (19) at the middle position of the top of the support seat (1), the bottom of the protective sleeve (2) being provided with mounting slots (15) on both sides, the support seat (1) being provided with a water absorption groove (17), the water absorption groove (17) being provided with a water absorption sheet (16) therein, the bottom of the support seat (1) being evenly provided with reserved grooves (21), the reserved grooves (21) being fixedly connected with positioning suction cups (20) therein.

2. A pipette for preventing solution contamination according to claim 1, characterized in that: The bottom end of the protective sleeve (2) contacts the top end of the support seat (1), and the mounting block (18) is embedded in the interior of the mounting slot (15).

3. A liquid transfer pipette for preventing solution contamination according to claim 1, characterized in that: The through hole (19) and the water absorption groove (17) are in a through connection, and the bottom end of the protective sleeve (2) and the through hole (19) are in a through connection.

4. A liquid transfer pipette for preventing solution contamination according to claim 1, characterized in that: The protective cover (2) is provided with a groove inside, the bottom end of the pipette (3) has the same shape as the groove, and the bottom end of the pipette (3) can be embedded in the groove of the protective cover (2).

5. A liquid transfer pipette for preventing solution contamination according to claim 1, characterized in that: The bottom end of the limiting rod (7) is fixedly connected to the limiting plate (10), and one end of the screw shaft (23) is fixedly connected to one end of the limiting rod (7).

6. A liquid transfer pipette for preventing solution contamination according to claim 1, characterized in that: The top ends of the mounting tube (11) and the pipette (3) are both provided with external threads (13), the interior of the connecting tube (4) is provided with a reserved opening (25), and the inner side of the reserved opening (25) is provided with internal threads (24).

7. A liquid transfer pipette for preventing solution contamination according to claim 6, characterized in that: The bottom end of the mounting tube (11) and the top end of the pipette (3) are respectively inserted into the top end and the bottom end of the connecting tube (4), and the mounting tube (11) and the pipette (3) are threadedly fixed to the connecting tube (4).

8. A liquid transfer pipette for preventing solution contamination according to claim 1, characterized in that: The outside of the connecting tube (4) is provided with anti-slip grooves (12), and the front end of the pipette (3) is provided with scale lines (14).

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