Suction head for experiment

Abstract

The utility model discloses a suction head for experiments, which relates to the technical field of experimental equipment, aims to solve the problem that liquid flows out to cause pollution when the suction head is discarded, and adopts the technical scheme that the suction head comprises a suction head body which is of a tubular structure, the diameter of the suction head body is gradually reduced from one end to the other end, the suction head body is made of PE (polyethylene) materials, and one end of the suction head body is provided with a connecting pipe; one end of the suction head body is provided with a connecting pipe, the other end of the suction head body is provided with a suction pipe, the side wall of the suction head body is provided with a mounting seat, the mounting seat is detachably provided with a sealing assembly, the sealing assembly comprises a first sealing cover used for sealing the connecting pipe and a second sealing cover used for sealing the suction pipe, and the first sealing cover and the second sealing cover are detachably connected together. The suction head for the experiment is long in service life, the suction head body can be completely sealed, liquid can be prevented from flowing out when the suction head is discarded, and environmental pollution is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental equipment, in particular to a suction head for an experiment. Background Art

[0002] In medical treatment, pharmaceuticals, gene and protein research, biological research, drug development laboratories and other biotechnology application fields, pipettes are often needed to manipulate laboratory samples in various laboratory operating procedures. A certain volume of liquid is sucked into the pipette by the pipette, and then the liquid is distributed into one or more distribution volumes. The principle of the pipette is a piston movement. When the pipette tip is assembled on the pipette, the piston in the pipette sucks a section of air, and the pipette tip will simultaneously suck a section of liquid of equal volume. The whole process requires that the pipette and the pipette tip are airtight, and the inner wall of the pipette tip and the outer wall of the pipette nozzle part are completely fitted to ensure the airtightness of the connected space.

[0003] Existing pipette tips are hollow tubular items mainly made of polyethylene material, with a connection port at one end and a suction port at the other end. The connection tube is used to insert the nozzle of the pipette, and the suction port is used to suck liquid. After the tip is used, liquid is likely to remain inside, and the liquid can flow out through the connection tube and the suction port. Once the experimental liquid is contaminated and liquid flows out when the tip is discarded, it is easy to cause environmental pollution. Utility Model Content

[0004] The purpose of the utility model is to provide an experimental suction head to solve the above-mentioned problem, which can prevent liquid from flowing out and prevent environmental pollution.

[0005] The utility model achieves the above-mentioned purpose through the following technical scheme: an experimental suction head, comprising a suction head body with a tubular structure and a diameter gradually decreasing from one end to the other end, a connecting pipe is arranged at one end of the suction head body, and a suction pipe is arranged at the other end, a mounting seat is arranged on the side wall of the suction head body, a closing component is detachably mounted on the mounting seat, the closing component comprises a first sealing cover for closing the connecting pipe and a second sealing cover for closing the suction pipe, and the first sealing cover and the second sealing cover are detachably connected together.

[0006] As a further configuration of the present invention, the first sealing cover comprises a first cover plate, and an insert block for inserting into the interior of the connecting pipe is arranged on the first cover plate.

[0007] As a further configuration of the utility model, a sealing rubber ring is sleeved on the outside of the insert block.

[0008] As a further configuration of the utility model, a groove for embedding a sealing rubber ring is circumferentially opened on the side wall of the insert block.

[0009] As a further configuration of the utility model, the second cover includes a second cover plate matching the first cover plate, a threaded head is provided on the second cover plate, an external thread structure is provided on the side wall of the threaded head, and an internal thread structure matching the external thread structure is provided on the inner circumferential wall of the suction pipe.

[0010] As a further configuration of the utility model, a slot is provided on the side of the first cover plate facing away from the plug block, a block for snapping into the slot is provided on the side of the second cover plate facing away from the threaded head, a slot is vertically provided on the inner circumferential wall of the slot, an annular groove connected to the slot is circumferentially provided on the inner circumferential wall of the slot, and a limiting block for snapping into the slot and the annular groove in sequence is provided on the side wall of the block.

[0011] As a further configuration of the utility model, an elastic block is arranged inside the mounting seat, and a plug hole for inserting a threaded head is opened at the center of the elastic block, and the hole diameter of the plug hole is smaller than the diameter of the threaded head.

[0012] As a further configuration of the utility model, a plurality of anti-slip convex strips are arranged on the side walls of the first cover plate and the second cover plate.

[0013] As a further configuration of the utility model, the nozzle body is made of PE material.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model has a long service life. After use, the sealing component can be removed from the mounting seat, the suction tube is first sealed by the second sealing cover, and then the suction head body is pulled off the nozzle of the pipette, and then the first sealing cover is removed from the second sealing cover, and finally the connecting tube is sealed by the first sealing cover, so that the suction head body is completely sealed, and when the suction head is discarded, liquid can be prevented from flowing out, thereby preventing environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 The structure of the first cover in the utility model is schematically shown Figure 1 ;

[0018] Figure 3 The structure of the first cover in the utility model is schematically shown Figure 2 ;

[0019] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 5 It is a structural schematic diagram of the second sealing cover in the utility model.

[0021] Figure numerals: 1, suction head body; 2, connecting pipe; 3, suction pipe; 4, mounting seat; 5, first cover plate; 6, plug block; 7, sealing rubber ring; 8, embedding groove; 9, second cover plate; 10, threaded head; 11, slot; 12, block; 13, slot; 14, annular groove; 15, limit block; 16, elastic block; 17, socket; 18, anti-slip convex strip. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 1 As shown, an experimental pipette tip comprises a pipette tip body 1 which is in a tubular structure and has a diameter which gradually decreases from one end to the other end. The pipette tip body 1 is made of PE material. The PE material has good flexibility and high strength, thereby ensuring the structural strength of the pipette tip body 1, so that the pipette tip has a long service life. A connecting pipe 2 is arranged at one end of the pipette tip body 1, and a suction pipe 3 is arranged at the other end. A mounting seat 4 is arranged on the side wall of the pipette tip body 1, and a closing component is detachably mounted on the mounting seat 4. The closing component comprises a first sealing cover for closing the connecting pipe 2 and a second sealing cover for closing the suction pipe 3, and there is a sealing cover between the first sealing cover and the second sealing cover. They are detachably connected together. After the use of the pipette tip, the sealing assembly can be removed from the mounting base 4, and the suction tube 3 can be closed by the second sealing cover first. Then, the pipette tip body 1 can be pulled off the nozzle of the pipette, and then the first sealing cover can be removed from the second sealing cover. Finally, the connecting tube 2 can be closed by the first sealing cover to achieve a complete sealing of the pipette tip body 1. When the pipette tip is discarded, liquid can be prevented from flowing out and environmental pollution can be prevented. In the process of discarding the pipette tip, the operation of closing the suction tube 3 first can avoid excessive force when pulling out the pipette tip body 1, which may cause liquid to splash out through the suction tube 3, thereby effectively preventing liquid loss.

[0024] See also Figure 1-5As shown, the first sealing cover includes a first cover plate 5, on which an insert block 6 for inserting into the interior of the connecting tube 2 is arranged. The connecting tube 2 can be closed by covering the first cover plate 5 on the connecting tube 2 and inserting the insert block 6 into the interior of the connecting tube 2 for fixing. When the connecting tube 2 needs to be opened, the insert block 6 only needs to be pulled out from the interior of the connecting tube 2. The operation is relatively convenient and simple, thereby facilitating the closing of the connecting tube 2. A sealing rubber ring 7 is sleeved on the outside of the insert block 6. When the insert block 6 is inserted into the interior of the connecting tube 2, the sealing rubber ring 7 is squeezed by the inner wall of the connecting tube 2 and elastically deforms, thereby firmly pressing against the inner wall of the connecting tube 2, so that the connection between the insert block 6 and the connecting tube 2 is more secure and not easy to fall off, thereby improving the sealing firmness of the first sealing cover to the connecting tube 2. A circumferentially arranged embedding groove 8 for embedding the sealing rubber ring 7 is provided on the side wall of the insert block 6. The limiting of the sealing rubber ring 7 can improve the connection firmness between the sealing rubber ring 7 and the plug block 6, and prevent the sealing rubber ring 7 from falling off the plug block 6. The second cover includes a second cover plate 9 matching the first cover plate 5, and a threaded head 10 is arranged on the second cover plate 9, and an external thread structure is arranged on the side wall of the threaded head 10, and an internal thread structure matching the external thread structure is arranged on the inner peripheral wall of the suction pipe 3. By screwing the threaded head 10 into the interior of the suction pipe 3, the second cover plate 9 is covered on the suction pipe 3, so that the suction pipe 3 can be closed. The threaded connection has good firmness and is relatively convenient to operate, thereby facilitating the closing of the suction pipe 3. Among them, a number of anti-slip convex strips 18 are arranged on the side walls of the first cover plate 5 and the second cover plate 9, thereby greatly increasing the friction coefficient on the side walls of the first cover plate 5 and the second cover plate 9, so that it is not easy to slip when rotating the first cover plate 5 or the second cover plate 9, and the operation is relatively labor-saving.

[0025] See also Figure 3-5As shown, a card slot 11 is provided on the side of the first cover plate 5 facing away from the plug block 6, and a card block 12 for being inserted into the card slot 11 is provided on the side of the second cover plate 9 facing away from the threaded head 10, a slot 13 is vertically provided on the inner peripheral wall of the card slot 11, an annular groove 14 connected with the slot 13 is circumferentially provided on the inner peripheral wall of the card slot 11, and a limiting block 15 for being inserted into the slot 13 and the annular groove 14 in sequence is provided on the side wall of the card block 12. When the sealing assembly is not in use, the first cover and the second cover can be connected together, and the card block 12 is first inserted into the card slot 11, so that the limiting block 15 is then inserted into the slot 13 and slides until the slot 13 is connected with the annular groove 14. At this time, the first cover plate 5 or the second cover plate 9 is rotated so that the limit block 15 can be inserted into the annular groove 14. The annular groove 14 limits the limit block 15, so that the first cover and the second cover can be firmly connected. When the sealing assembly is used, the first cover and the second cover can be separated. First, the first cover plate 5 or the second cover plate 9 is rotated so that the limit block 15 slides from the annular groove 14 to the slot 13 to release the lock. Then, the card block 12 is pulled outward and pulled out from the card slot 11 to achieve separation. Through this arrangement, the connection and separation of the first cover and the second cover are relatively convenient and simple, so that the use of the sealing assembly is relatively convenient.

[0026] See also Figure 1 , Figure 5 As shown, an elastic block 16 is arranged inside the mounting seat 4. The elastic block 16 is made of rubber material, and a socket 17 for inserting the threaded head 10 is opened at the center position of the elastic block 16. The aperture of the socket 17 is smaller than the diameter of the threaded head 10, wherein a plurality of clearance grooves (not marked in the figure) are opened on the elastic block 16 in the circumferential direction of the socket 17 to facilitate the deformation of the socket 17 under force. When the sealing assembly is not in use, the threaded head 10 can be inserted into the socket 17, and the socket 17 will expand under the action of the force of the threaded head 10 being inserted, so as to facilitate the continued insertion of the threaded head 10. After the threaded head 10 is inserted, it can firmly resist the threaded head 10, so that the sealing assembly is firmly installed on the suction head body. When the sealing assembly needs to be used, it is only necessary to pull the threaded head 10 out of the socket 17, and the operation is relatively convenient and labor-saving.

[0027] 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.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pipette tip for use in an experiment, comprising a pipette tip body (1) having a tubular structure and a diameter that gradually decreases from one end to the other end, wherein one end of the pipette tip body (1) is provided with a connecting tube (2) and the other end is provided with a suction tube (3), characterized in that: A mounting seat (4) is provided on the side wall of the nozzle body (1), and a sealing component is detachably mounted on the mounting seat (4), wherein the sealing component comprises a first sealing cover for sealing the connecting pipe (2) and a second sealing cover for sealing the suction pipe (3), wherein the first sealing cover and the second sealing cover are detachably connected together.

2. The experimental pipette tip according to claim 1, characterized in that: The first sealing cover comprises a first cover plate (5), and the first cover plate (5) is provided with an insert block (6) for inserting into the interior of the connecting pipe (2).

3. The experimental pipette tip according to claim 2, characterized in that: The insert block (6) is sleeved with a sealing rubber ring (7) on its exterior.

4. The experimental pipette tip according to claim 3, characterized in that: A groove (8) for embedding the sealing rubber ring (7) is circumferentially formed on the side wall of the insert block (6).

5. The experimental pipette tip according to claim 2, characterized in that: The second cover comprises a second cover plate (9) matching with the first cover plate (5), the second cover plate (9) being provided with a thread head (10), the side wall of the thread head (10) being provided with an external thread structure, and the inner peripheral wall of the suction pipe (3) being provided with an internal thread structure matching with the external thread structure.

6. The experimental pipette tip according to claim 5, characterized in that: A slot (11) is provided on the side of the first cover plate (5) facing away from the plug block (6); a block (12) for snapping into the slot (11) is provided on the side of the second cover plate (9) facing away from the threaded head (10); a slot (13) is vertically provided on the inner peripheral wall of the slot (11); an annular groove (14) communicating with the slot (13) is circumferentially provided on the inner peripheral wall of the slot (11); and a limit block (15) for snapping into the slot (13) and the annular groove (14) in sequence is provided on the side wall of the block (12).

7. The experimental pipette tip according to claim 5, characterized in that: An elastic block (16) is arranged inside the mounting seat (4), and a plug hole (17) for inserting the threaded head (10) is provided at the center of the elastic block (16), and the hole diameter of the plug hole (17) is smaller than the diameter of the threaded head (10).

8. The experimental pipette tip according to claim 5, characterized in that: A plurality of anti-slip convex strips (18) are provided on the side walls of the first cover plate (5) and the second cover plate (9).

9. The experimental pipette tip according to claim 1, characterized in that: The suction head body (1) is made of PE material.

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