Pipette tip with anti-pumpback function

Abstract

The utility model discloses a pipette tip with a pumpback prevention function. The pipette tip with the anti-pumpback function comprises a pipette tip body, the pipette tip body is composed of a gun barrel and a suction head, an anti-pumpback part is installed above the gun barrel and comprises a buffer groove installed above the gun barrel, a buffer cavity is formed in the buffer groove, through openings are formed in the two sides of the buffer cavity, and the suction head is installed in the buffer cavity. And through holes formed in the two sides of the buffer groove are communicated with a return pipe arranged on the gun barrel. According to the pipette tip with the pumpback prevention function, the arranged gun barrel and the pumpback prevention component are matched for use, so that liquid can be effectively prevented from being pumped back into a pipette, and compared with a traditional pipette gun barrel, the pipette gun barrel adopting the pumpback prevention design can effectively prevent pollution-containing liquid from being pumped back, so that the pipette tip has the advantages of being simple in structure and convenient to use. And the risk of cross contamination in the experiment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipette tips, in particular to a pipette tip with an anti-backdraw function. Background Art

[0002] Pipette tips are a type of consumable material that is widely used in the fields of medicine, biology, chemistry, etc. They are used in conjunction with pipettes to measure liquids. The pipette tip and the pipette are tightly connected through the connecting part with a conical hole of the pipette tip and the connecting part with a similar conical head of the pipette.

[0003] In existing pipette tip installation, the pipette is usually kept vertically, the tip is gently inserted into the pipette head, and then a coarse adjustment is performed to bring the pipette capacity close to the expected value. Then, a fine adjustment is performed to ensure the capacity setting is accurate, the pipette is kept vertically, and finally the tip is inserted to an appropriate depth below the liquid surface to steadily aspirate the liquid into the tip.

[0004] However, this pipette tip has certain defects. Since quantitative liquid needs to be aspirated in biological experiments, if the thumb is released too quickly when aspirating the liquid, the liquid will rush up from the pipette tip quickly, which may generate bubbles and contaminate the inside of the pipette. Once the liquid or bubbles enter the pipette, they will corrode the plunger and other sensitive parts, reducing the life of the pipette.

[0005] Therefore, it is necessary to provide a pipette tip with an anti-backdraw function to solve the above technical problems. Utility Model Content

[0006] In response to the above situation, in order to overcome the defects of the existing technology, the utility model provides a pipette tip with an anti-backdraw function that can effectively prevent the liquid from being drawn back into the pipette. The anti-backdraw design can effectively prevent the backdrawing of contaminated liquid and reduce the risk of cross contamination in the experiment.

[0007] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0008] A pipette tip with an anti-backdraw function includes: a pipette tip body, the pipette tip body consisting of a barrel and a suction tip, an anti-backdraw component installed above the barrel, the anti-backdraw component including a buffer groove installed above the barrel, a buffer cavity provided in the buffer groove, through openings on both sides of the buffer cavity, and the through openings provided on both sides of the buffer groove are connected to a reflux pipe provided on the barrel.

[0009] Preferably, a connecting pipe is installed at the end side of the buffer tank, a sealing ring is provided on the outer ring of the connecting pipe, the return pipe is made of elastic material, and the connecting pipe installed at the end side of the buffer tank is sleeved in the return pipe cavity.

[0010] Preferably, a partition is provided in the buffer tank, the partition defines a rectangular cavity, and the partition is installed above the left and right openings.

[0011] Preferably, the outer ring of the bottom of the gun barrel is provided with a threaded structure, the inner ring of the suction head is provided with a threaded cavity, and the gun barrel is spirally connected to the suction head.

[0012] Preferably, a connecting sleeve is provided at the bottom of the buffer groove, a threaded ring is provided on the outer ring of the connecting sleeve, and the buffer groove is detachably spirally installed in a through cavity provided at the end of the barrel through the connecting sleeve.

[0013] Preferably, a collar is provided on the top of the buffer groove, and outer threads are provided on both the upper and lower ends of the collar. The collar is designed as a cavity structure, and the collar is spirally connected to the upper cavity opening of the buffer groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The utility model can effectively prevent the liquid from being drawn back into the pipette by using the gun barrel and the anti-backdraw component. Compared with the traditional pipette gun barrel, the pipette gun barrel with the anti-backdraw design can effectively prevent the backdrawing of contaminated liquid, reducing the risk of cross contamination in the experiment;

[0016] (2) The utility model cooperates with the buffer tank, connecting pipe and return pipe by setting the return pipe as an elastic material structure. During actual installation, the return pipes on both sides of the gun barrel are bent to a certain degree, and then the buffer tank is installed on the upper end of the gun barrel. Finally, by adjusting the return pipes on both sides, one end of the return pipes on both sides is aligned with the connecting pipes set on both sides of the buffer tank until the connecting pipes are sleeved in the return pipes at both ends. At the same time, a sealing ring is provided on the connecting pipe to ensure that the connecting pipe is tightly engaged in the return pipe. By engaging and connecting the connecting pipe provided in the buffer tank with the return pipe provided on the gun barrel, the subsequent disassembly of the buffer tank is facilitated, and the subsequent cleaning of the reflux liquid in the buffer tank is facilitated.

[0017] (3) The utility model provides a partition in the buffer tank. When the reflux liquid is stored in half of the buffer tank, in order to prevent the reflux liquid from overflowing the buffer tank, the partition can be provided to effectively control the liquid level of the reflux liquid, thereby allowing a portion of the reflux liquid to be transported to the reflux pipes on both sides, reducing the risk of the reflux liquid overflowing the buffer tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the pipette tip with anti-backdraw function provided by the utility model;

[0019] Figure 2The anti-withdrawal component and the gun barrel mounting structure schematic view are provided.

[0020] Figure 3 The gun barrel and the suction head mounting structure schematic view are provided.

[0021] Figure 4 The anti-withdrawal component internal structure schematic view is provided.

[0022] Corresponding names of the reference signs are as follows: 100, pipette head body; 101, gun barrel; 102, suction head; 103, threaded structure; 104, threaded cavity; 105, through cavity; 106, backflow pipe; 200, anti-withdrawal component; 201, buffer groove; 202, buffer cavity; 203, through opening; 204, partition plate; 205, connecting pipe; 206, connecting sleeve; 300, sleeve ring. DETAILED DESCRIPTION

[0023] The utility model is further illustrated by combining with the drawings and examples, and the mode of the utility model includes but is not limited to the following examples.

[0024] First embodiment:

[0025] As Figures 1-4 Indicated, the pipette head with anti-withdrawal function provided by the utility model comprises: a pipette head body 100, the pipette head body 100 is composed of a gun barrel 101 and a suction head 102, an anti-withdrawal component 200 is mounted above the gun barrel 101, the anti-withdrawal component 200 comprises a buffer groove 201 mounted above the gun barrel 101, a buffer cavity 202 is arranged in the buffer groove 201, through openings 203 are formed on both sides of the buffer cavity 202, the through openings 203 arranged on both sides of the buffer groove 201 are communicated with a backflow pipe 106 arranged on the gun barrel 101, in actual use, the experimental personnel aligns the output end of the pipette gun with the sleeve ring 300 on the upper end of the anti-withdrawal component 200, then screw installation can be carried out, after installation is completed, the experimental personnel keeps the pipette gun vertical, finally inserts the gun barrel 101 into the liquid surface to a proper depth, by starting the pipette gun, the liquid will enter into the gun barrel 101 from the suction head 102, when the liquid is incautiously sucked too much, the liquid will be upwardly withdrawn into the preset buffer cavity 202, the inner diameter of the buffer cavity 202 is greater than the inner diameter of the gun barrel 101, by the arrangement of the buffer cavity 202, the liquid sucked too much can be effectively stored, when the liquid extends to the half height in the buffer cavity 202, part of the liquid can flow back into the backflow pipe 106 from the through openings 203 arranged on both sides of the buffer groove 201, so that the possibility that the liquid overflows the buffer cavity 202 and is sucked into the pipette can be reduced.

[0026] Through the cooperation of the set gun barrel 101 and the anti-backflow component 200, the liquid can be effectively prevented from being sucked back into the pipette. Compared with the traditional gun barrel 101, the gun barrel 101 designed by the anti-backflow component 200 can effectively prevent the backflow of contaminated liquid and reduce the risk of cross contamination in experiments.

[0027] Second embodiment:

[0028] As shown in Figures 2-4 The connecting pipe 205 is installed at the end side of the buffer groove 201, a sealing ring is arranged on the outer ring of the connecting pipe 205, the backflow pipe 106 is made of elastic material, and the connecting pipe 205 installed at the end side of the buffer groove 201 is sleeved in the cavity opening of the backflow pipe 106.

[0029] Through the cooperation of the buffer groove 201, the connecting pipe 205 and the backflow pipe 106, the backflow pipe 106 is made of elastic material, and in actual installation, the backflow pipe 106 on both sides of the gun barrel 101 is bent to a certain extent, the buffer groove 201 is screw-mounted on the upper end of the gun barrel 101 through the sleeve ring 300, and finally the backflow pipe 106 on both sides is adjusted to align the connecting pipe 205 arranged on both sides of the buffer groove 201, and then the connecting pipe 205 is sleeved in the backflow pipe 106 on both ends. At the same time, the sealing ring arranged on the connecting pipe 205 can ensure that the connecting pipe 205 is tightly clamped in the backflow pipe 106. By clamping and connecting the connecting pipe 205 arranged on the buffer groove 201 with the backflow pipe 106 arranged on the gun barrel 101, the subsequent disassembly work of the buffer groove 201 is facilitated, and the subsequent cleaning treatment of the backflow liquid in the buffer groove 201 is facilitated.

[0030] Third embodiment:

[0031] As shown in Figures 3-4 The buffer groove 201 is provided with a partition plate 204, the partition plate 204 is provided with a rectangular cavity, and the partition plate 204 is installed above the left and right two through openings 203.

[0032] By arranging the partition plate 204 in the buffer groove 201, when the backflow liquid is stored to half of the buffer groove 201, in order to prevent the backflow liquid from overflowing the buffer groove 201, the liquid level of the backflow liquid can be effectively controlled by arranging the partition plate 204, and then a part of the backflow liquid is transported into the backflow pipe 106 on both sides, thereby reducing the risk that the backflow liquid will overflow the buffer groove 201.

[0033] Fourth embodiment:

[0034] As shown in Figure 3 The bottom outer ring of the gun barrel 101 is provided with a threaded structure 103, the inner ring of the suction head 102 is provided with a threaded cavity 104, and the gun barrel 101 is screw-connected with the suction head 102.

[0035] Fifth embodiment:

[0036] like Figure 4 As shown, a connecting sleeve 206 is provided at the bottom of the buffer groove 201 , and a threaded ring is provided on the outer ring of the connecting sleeve 206 . The buffer groove 201 is detachably spirally installed in the through cavity 105 provided at the end of the barrel 101 through the connecting sleeve 206 .

[0037] Sixth embodiment:

[0038] like Figure 4 As shown, a collar 300 is provided on the top of the buffer groove 201 , and outer threads are provided on both the upper and lower ends of the collar 300 . The collar 300 is designed as a cavity structure, and the collar 300 is spirally connected to the upper cavity opening of the buffer groove 201 .

[0039] Working principle: When in use, the experimenter aligns the output end of the pipette with the ring 300 at the upper end of the anti-backdraw component 200, and then screws it on. After the installation is completed, the experimenter keeps the pipette vertical, and finally inserts the barrel 101 to an appropriate depth below the liquid surface. By starting the pipette, the liquid will enter the barrel 101 from the suction head 102. When too much liquid is accidentally inhaled, the liquid will be withdrawn upward into the preset buffer chamber 202. The inner diameter of the buffer chamber 202 is larger than the inner diameter of the barrel 101. Through the setting of the buffer chamber 202, the excessively inhaled liquid can be effectively stored. When the liquid slowly extends to half the height of the buffer chamber 202, part of the liquid can flow back to the reflux pipe 106 from the ports 203 set on both sides of the buffer tank 201.

[0040] The above embodiment is only one of the preferred implementation methods of the present invention and should not be used to limit the scope of protection of the present invention. Any changes or modifications that have no substantive meaning made to the main design concept and spirit of the present invention, as long as the technical problems they solve are still consistent with the present invention, should be included in the scope of protection of the present invention.

Claims

1. A pipette tip with an anti-backflow function, characterized in that: include: A pipette tip body (100) is provided, wherein the pipette tip body (100) is composed of a gun barrel (101) and a suction head (102); an anti-backdraw component (200) is installed above the gun barrel (101); the anti-backdraw component (200) comprises a buffer groove (201) installed above the gun barrel (101); a buffer cavity (202) is provided in the buffer groove (201); through openings (203) are provided on both sides of the buffer cavity (202); the through openings (203) provided on both sides of the buffer groove (201) are connected to a reflux pipe (106) provided on the gun barrel (101).

2. A pipette tip with an anti-backflow function according to claim 1, characterized in that: The end side of the buffer tank (201) is provided with a connecting pipe (205), the outer ring of the connecting pipe (205) is matched with a sealing ring, the return pipe (106) is made of elastic material, and the connecting pipe (205) installed on the end side of the buffer tank (201) is sleeved in the cavity of the return pipe (106).

3. A pipette tip with anti-backdraw function according to claim 2, characterized in that: A partition (204) is provided in the buffer tank (201), the partition (204) defines a rectangular cavity, and the partition (204) is installed above the left and right openings (203).

4. A pipette tip with an anti-backdraw function according to claim 1, characterized in that: The outer ring of the bottom of the gun barrel (101) is provided with a thread structure (103), the inner ring of the suction head (102) is provided with a thread cavity (104), and the gun barrel (101) and the suction head (102) are spirally connected.

5. The pipette tip with anti-backdraw function according to claim 3, characterized in that: The bottom of the buffer groove (201) is provided with a connecting sleeve (206), the outer ring of the connecting sleeve (206) is provided with a threaded ring, and the buffer groove (201) is detachably spirally installed in a through cavity (105) provided at the end of the gun barrel (101) through the connecting sleeve (206).

6. A pipette tip with anti-backdraw function according to claim 5, characterized in that: A collar (300) is provided on the top of the buffer groove (201), and outer threads are provided at both upper and lower ends of the collar (300). The collar (300) is designed as a cavity structure, and the collar (300) is spirally connected to the upper cavity opening of the buffer groove (201).

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