Liquid suction tip

Abstract

The utility model discloses a liquid suction head, which relates to the field of liquid extraction devices, and adopts the technical scheme that the liquid suction head comprises a liquid suction pipe and a main liquid suction port, a plurality of auxiliary liquid suction ports arranged along the circumferential direction of the liquid suction pipe are formed in the peripheral wall of the liquid suction pipe, a switching head is rotatably connected to the peripheral wall of the liquid suction pipe, and a plurality of through ports are formed in the switching head. According to the utility model, the switching head is rotated to enable the plurality of ports and the auxiliary liquid suction ports to be overlapped, and the switching head is fixed on the peripheral wall of the liquid suction pipe through the fixing mechanism, so that when the liquid suction pipe is used for sucking the liquid, the liquid passes through the main liquid suction port, and then the liquid is sucked through the auxiliary liquid suction port. And the liquid passes through the through holes and the auxiliary liquid suction holes at the same time, the liquid suction capacity is improved by the liquid passing through the main liquid suction hole and the auxiliary liquid suction holes, and the influence of blockage caused when only the main liquid suction hole is used is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid taking device field, more specifically, it relates to a liquid suction head. BACKGROUND

[0002] The suction head is a disposable consumable, mainly used for liquid sampling and transferring in medical and scientific research fields, and its use mode is: installing the suction head on a pipettor, and then aiming the suction head at the liquid for extraction.

[0003] The existing suction head comprises a liquid suction pipe, a liquid storage pipe and a connecting pipe, the connecting pipe is installed on the pipettor, the liquid suction pipe is used for sucking liquid, when the liquid is extracted, the liquid flows through the liquid suction pipe, the liquid storage pipe and the connecting pipe in sequence, and the cross section of the liquid suction pipe is in the shape of an inverted circular truncated cone.

[0004] The existing liquid suction pipe generally has only one main suction port, when medical treatment, medicine, gene and protein research or blood analysis are carried out, the pipettor is often used to manipulate experimental samples in various devices, and a certain volume of liquid is sucked into the suction head by the pipettor. When sucking liquid, the suction head needs to be inserted into the liquid, if there is a clot in the blood, the clot in the blood will block the main suction port of the suction head, and the operation of the experiment is affected.

[0005] Therefore, a new scheme is needed to solve this problem. UTILITY MODEL CONTENT

[0006] In view of the defects in the prior art, the utility model aims at providing a liquid suction head.

[0007] The above technical purpose of the utility model is realized by the following technical scheme: a liquid suction head, comprising a liquid suction pipe and a main suction port, a plurality of auxiliary suction ports are arranged on the outer peripheral wall of the liquid suction pipe, a switching head is rotatably connected to the outer peripheral wall of the liquid suction pipe, a plurality of through holes are arranged on the switching head, the through holes and the auxiliary suction ports are arranged in coincidence or dislocation by rotating the switching head, and a sealing element is arranged between the switching head and the liquid suction pipe.

[0008] The utility model is further provided with: the outer peripheral wall of the liquid suction pipe is fixedly connected with an annular ring, an annular groove is arranged on the inner wall of the switching head for the rotation of the annular ring, and the sealing element is fixedly connected to the annular ring.

[0009] The utility model is further provided with: the sealing element is a sealing ring fixedly connected to the annular ring, and the sealing ring and the inner wall of the annular groove are tightly arranged.

[0010] The utility model is further provided with: the outer peripheral wall of the switching head is integrally formed with an obstruction through a connecting belt, and the obstruction can be embedded into the main suction port.

[0011] The utility model further sets up: the outer peripheral wall of switching head is fixedly connected with the annular hook for connecting with the card.

[0012] The utility model further sets up: the pipette and switching head all adopt PP material to make.

[0013] In summary, the utility model has following beneficial effect: through rotating switching head, until several through -opening and auxiliary liquid suction mouth are coincident set, through fixed mechanism, switching head is fixed on the outer peripheral wall of pipette, after using pipette to suck liquid, liquid passes through main liquid suction mouth, and liquid passes through several through -opening and auxiliary liquid suction mouth simultaneously, after again through liquid storage pipe and connecting pipe, liquid passes through main liquid suction mouth and several auxiliary liquid suction mouth improves the liquid suction capacity, reduces the influence of only using main liquid suction mouth to cause the blockage. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is structure schematic view of the utility model;

[0015] Figure 2 It is sectional view of the utility model;

[0016] Figure 3 It is Figure 2 A part enlarged schematic view of;

[0017] In the drawing: 1, pipette;2, main liquid suction mouth;3, auxiliary liquid suction mouth;4, switching head;5, through -opening;6, annular ring;7, annular groove;8, connecting band;9, block;10, annular hook;11, sealing ring. DETAILED DESCRIPTION

[0018] The utility model is described in detail below in combination with the drawings and examples. Example

[0019] A kind of liquid suction head, such as Figures 1 to 3As shown, including connecting pipe, liquid storage pipe, liquid suction pipe 1 and main liquid suction port 2, connecting pipe, liquid storage pipe and liquid suction pipe 1 are integrally injection molded, four auxiliary liquid suction ports 3 are arranged on the outer peripheral wall of the liquid suction pipe 1, the switching head 4 is rotatably connected to the outer peripheral wall of the liquid suction pipe 1, four through ports 5 are arranged on the switching head 4, the through ports 5 and the auxiliary liquid suction ports 3 are arranged in coincidence or dislocation by rotating the switching head 4, the sealing element is arranged between the switching head 4 and the liquid suction pipe 1, when only the main liquid suction port 2 is used for liquid suction, the four auxiliary liquid suction ports 3 and the through ports 5 are arranged in dislocation at this time, so that the liquid passes through the main liquid suction port 2, the liquid storage pipe and the connecting pipe in turn, the switching head 4 is rotated until the four through ports 5 and the auxiliary liquid suction ports 3 are arranged in coincidence, then the liquid suction pipe 1 is used for liquid suction, the liquid passes through the main liquid suction port 2, and the liquid passes through the four through ports 5 and the auxiliary liquid suction ports 3 at the same time, then passes through the liquid storage pipe and the connecting pipe, the liquid passes through the main liquid suction port 2 and the auxiliary liquid suction ports 3 to improve the liquid suction capacity and reduce the influence of the blockage of the main liquid suction port 2.

[0020] As shown in the figure, Figures 1 to 3 The outer peripheral wall of the liquid suction pipe 1 is integrally injection molded with an annular ring 6, the inner wall of the switching head 4 is provided with an annular groove 7 for rotating the annular ring 6, the sealing element is fixedly connected to the annular ring 6, the sealing element is a sealing ring 11 adhered to the annular ring 6, the sealing ring 11 is made of rubber material, the sealing ring 11 and the inner wall of the annular groove 7 are tightly abutted with each other, the user rotates the switching head 4, at this time the sealing ring 11 and the inner wall of the annular groove 7 are tightly abutted with each other, and the sealing ring 11 and the annular ring 6 are rotated in the annular groove 7, at the same time the sealing ring 11 and the inner wall of the annular groove 7 are relatively fixed by friction force for the switching head 4 and the liquid suction pipe 1, until the four through ports 5 and the four auxiliary liquid suction ports 3 are arranged in coincidence, at this time the sealing ring 11 and the inner wall of the annular groove 7 are relatively fixed by friction force to make the switching head 4 conveniently and stably arranged on the liquid suction pipe 1, to improve the stability when the four through ports 5 and the four auxiliary liquid suction ports 3 are arranged in coincidence, so that the liquid can be stably taken through the main liquid suction port 2, the four through ports 5 and the auxiliary liquid suction ports 3 at the same time.

[0021] As shown in the figure, Figures 1 to 3As shown, the outer peripheral wall of the switching head 4 is integrally formed with the blocking 9 through the connecting band 8, the blocking 9 can be embedded into the main suction port 2, and the blocking 9 is embedded into the main suction port 2 through friction force to be embedded into the main suction port 2, the outer peripheral wall of the switching head 4 is integrally formed with the annular hook 10 for clamping the connecting band 8, by rotating the switching head 4 until the four through ports 5 and the auxiliary suction port 3 are coincidentally arranged, at this time, the sealing ring 11 and the inner wall of the annular groove 7 are in frictional contact to facilitate the coincident arrangement of the through port 5 and the auxiliary suction port 3, and the connecting band 8 is wound on the outer peripheral wall of the switching head 4, then the movable end of the connecting band 8 is clamped into the annular hook 10 to prevent the blocking 9 from moving, at this time, the bottom of the switching head 4 and the bottom of the suction tube 1 are in contact with the liquid, the switching head 4 is not completely immersed in the liquid, and the connecting band 8, the blocking 9 and the annular hook 10 are not immersed in the liquid, so that when the suction tube 1 is used to suck liquid, the liquid is prevented from contacting the blocking 9, when the suction head needs to be disassembled, the switching head 4 is rotated until the four through ports 5 and the auxiliary suction port 3 are arranged in a staggered manner, at this time, the auxiliary suction port 3 is not in flow communication with the outside, and the sealing ring 11 and the annular ring 6 are rotated in the annular groove 7, and the sealing ring 11 and the inner wall of the annular groove 7 are still in frictional contact to facilitate the staggered arrangement of the through port 5 and the auxiliary suction port 3, then the connecting band 8 is disengaged from the annular hook 10, and the blocking 9 is embedded into the main suction port 2 through friction force, at this time, the main suction port 2 is not in flow communication with the outside, so that when the suction head is disassembled, the auxiliary suction port 3 and the main suction port 2 are arranged in a staggered manner through the through port 5, and the blocking 9 is embedded into the main suction port 2, so that the auxiliary suction port 3 and the main suction port 2 are not in flow communication with the outside, reducing the liquid in the suction tube 1 from being thrown out during disassembly, reducing the pollution of the environment caused by the liquid being thrown out, facilitating the blocking 9 to be fixed in the main suction port 2 through friction force, and saving the fixing time and improving the work efficiency.

[0022] The suction tube 1 and the switching head 4 are made of PP material, and the PP material has good chemical corrosion resistance, thereby prolonging the service life of the suction tube 1 and the switching head 4.

[0023] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments, and any technical solutions falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principles of the present application shall also be considered as the protection scope of the present application.

Claims

1. A liquid suction head comprising a liquid suction tube (1) and a main liquid suction opening (2), characterized in that: The outer peripheral wall of the pipette (1) is provided with a plurality of auxiliary suction ports (3) arranged along the circumferential direction, and the outer peripheral wall of the pipette (1) is rotationally connected with a switching head (4), and the switching head (4) is provided with a plurality of through ports (5), and the through ports (5) and the auxiliary suction ports (3) are arranged in coincidence or dislocation by rotating the switching head (4), and the switching head (4) is provided with a sealing element between the switching head (4) and the pipette (1).

2. The liquid aspiration tip of claim 1, wherein: The outer peripheral wall of the pipette (1) is fixedly connected with an annular ring (6), the inner wall of the switching head (4) is provided with an annular groove (7) for the rotation of the annular ring (6), and the sealing element is fixedly connected on the annular ring (6).

3. The liquid aspiration tip of claim 2, wherein: The sealing element is a sealing ring (11) fixedly connected on the annular ring (6), and the sealing ring (11) and the inner wall of the annular groove (7) are in close contact with each other.

4. The liquid aspiration tip of claim 1, wherein: The outer peripheral wall of the switching head (4) is integrally formed with a blockage (9) through a connecting belt (8), and the blockage (9) can be embedded into the main suction port (2).

5. The liquid aspiration tip of claim 4, wherein: The outer peripheral wall of the switching head (4) is fixedly connected with an annular hook (10) for clamping the connecting belt (8).

6. The liquid aspiration tip of claim 1, wherein: The pipette (1) and the switching head (4) are made of PP material.

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