Liquid sampling device with switching function

Abstract

The application discloses a liquid sampling device with switching function, which comprises an external positioning frame, a flow guide plate, a rotating switching assembly, a squeeze air bag, a pipette, and a butt joint; the pipette, the lower flow guide channel, the side flow guide channel, the upper flow guide channel, and the liquid suction tube constitute the whole liquid sampling volume, wherein the liquid suction tube can be switched to adjust the liquid sampling volume; the rotating disc is rotated to drive the plurality of liquid suction tubes to rotate at the upper end of the flow guide plate, and the lower end of one of the liquid suction tubes is butted to the upper flow guide channel of the flow guide plate; the butt joint of different liquid suction tubes can achieve the purpose of switching the capacity, and the adjustment is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to a liquid sampling device with switching function. BACKGROUND

[0002] The liquid sampling device is a precision instrument for measuring the volume of liquid, and is an essential tool for sample collection and transfer in biological, chemical and clinical experimental analysis processes, and is mostly used in medical laboratories, biotechnology laboratories, food laboratories, pharmaceutical and chemical laboratories, environmental laboratories, etc. In medical clinical laboratories, it is mainly used in the sample preparation stage to achieve precise liquid proportioning and transfer. The existing liquid sampling device generally includes an air bag, a collection tube and an overflow liquid storage tube. The air bag is connected to the upper end of the overflow liquid storage tube, and the collection tube is inserted into the lower end of the overflow liquid storage tube, thereby forming a liquid sampling and transferring structure. The liquid is sucked by releasing the air bag through extrusion, and then the liquid is discharged by extruding the air bag again. However, the liquid sampling device with the above structure can only collect one volume of liquid, and cannot be flexibly and conveniently adjusted when multiple collection is required. Therefore, the structure needs to be upgraded. SUMMARY

[0003] In view of the above shortcomings of the prior art, the present application solves the problem of providing a liquid sampling device with switching function that can flexibly and conveniently adjust the liquid volume.

[0004] To solve the above problems, the technical scheme adopted by the present application is as follows:

[0005] A liquid sampling device with switching function, comprising an external positioning frame, a flow guide plate, a rotating switching assembly, an extrusion air bag, a pipette, and a butt joint; the external positioning frame is in a ring-shaped sleeve structure; the middle of the external positioning frame is provided with a flow guide plate; the lower side of the middle of the flow guide plate is provided with a lower side flow guide channel, one side of the upper end of the lower side flow guide channel is provided with a side flow guide channel, and the outer end of the upper side of the side flow guide channel is provided with an upper side flow guide channel; the upper side flow guide channel, the side flow guide channel and the lower side flow guide channel are designed to be sequentially communicated; the lower side of the lower side flow guide channel is provided with a butt joint around; the upper end of the pipette is inserted into the butt joint; the rotating switching assembly is installed on the upper side of the external positioning frame and the flow guide plate; the rotating switching assembly comprises a rotating disc, a butt joint pipe, an overflow pipe sleeve and a liquid suction pipe; the rotating disc is rotatably clamped and installed on the upper end of the external positioning frame; the middle of the rotating disc is provided with a ventilation cavity, an butt joint opening is formed in the upper end of the ventilation cavity, and the upper end of the butt joint opening is provided with a butt joint pipe; the upper end of the butt joint pipe is provided with an extrusion air bag; a plurality of ventilation openings are uniformly formed in the lower side of the ventilation cavity, and the lower side of each ventilation opening is provided with an overflow pipe sleeve; the lower end of each overflow pipe sleeve is inserted into a liquid suction pipe, and the inner diameters of the plurality of liquid suction pipes are different; the lower end of the liquid suction pipe abuts against the upper end surface of the flow guide plate; the rotating disc rotates to drive the plurality of liquid suction pipes to rotate, and sequentially drives the lower ends of the plurality of liquid suction pipes to abut against the upper end of the upper side flow guide channel.

[0006] Further, the lower end of the rotating disc is provided with a rotating clamping ring, the upper end of the external positioning frame is provided with an annular clamping groove, and the rotating disc is clamped on the annular clamping groove at the upper end of the external positioning frame through the rotating clamping ring at the lower end.

[0007] Further, an annular pressing groove is formed below the annular clamping groove, a plurality of extrusion springs are arranged in the annular pressing groove, and the upper ends of the extrusion springs are elastically pressed against the lower side of the rotating clamping ring.

[0008] Further, an annular overflow groove is formed between the upper part of the liquid suction tube and the inner side of the four sides of the overflow pipe sleeve.

[0009] Further, the lower end of the liquid suction tube is provided with a sealing ring.

[0010] Further, one side of the external positioning frame is provided with a positioning strip, the positioning strip is aligned with the upper side flow guide channel, and the rotating disc is uniformly provided with a pair of alignment strips, and the alignment strips are respectively aligned with the liquid suction tubes.

[0011] Further, the pipette is made of glass material or plastic high polymer material.

[0012] Further, the longitudinal section of the external positioning frame and the flow guide plate is in H-shaped structure.

[0013] The beneficial effects of the present application are as follows:

[0014] The pipette, the lower side flow guide channel, the side flow guide channel, the upper side flow guide channel and the liquid suction tube constitute the volume of the collected liquid, the liquid suction tube can be switched to adjust the volume of the collected liquid, the rotating disc is rotated to drive the plurality of liquid suction tubes to rotate at the upper end of the flow guide plate, and the lower end of one of the liquid suction tubes is connected to the upper side flow guide channel of the flow guide plate, the connection of different liquid suction tubes can achieve the purpose of switching the capacity, and the adjustment is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present application.

[0016] Figure 2 It is an enlarged structural schematic diagram in the present application.

[0017] Figure 3 It is a structural schematic diagram of the present application Figure 2 after switching the liquid suction tube.

[0018] Figure 4 It is a structural schematic diagram of the rotating disc and the vent opening of the present application. EMBODIMENT

[0019] The application will be further described in detail below with reference to the accompanying drawings.

[0020] As Figures 1 to 4 shown, a liquid sampling device with switching function, comprising external positioning frame 1, flow guide plate 2, rotating switching assembly 3, extrusion air bag 4, pipette 5, butt joint 6; the external positioning frame 1 is in the form of a ring-shaped sleeve structure; the middle of the external positioning frame 1 is provided with the flow guide plate 2; the lower side of the middle of the flow guide plate 2 is provided with a lower side flow guide channel 23, one side of the upper end of the lower side flow guide channel 23 is provided with a side flow guide channel 22, the outer end of the upper side of the side flow guide channel 22 is provided with an upper side flow guide channel 21; the upper side flow guide channel 21, the side flow guide channel 22 and the lower side flow guide channel 23 are designed to be communicated in sequence; the lower side of the lower side flow guide channel 23 is provided with the butt joint 6 around; the upper end of the pipette 5 is inserted into the butt joint 6; the rotating switching assembly 3 is installed on the upper side of the external positioning frame 1 and the flow guide plate 2; the rotating switching assembly 3 comprises rotating disc 31, butt joint pipe 34, overflow pipe sleeve 32 and liquid suction pipe 33; the rotating disc 31 is rotatably clamped and installed on the upper end of the external positioning frame 1; the middle of the rotating disc 31 is provided with a ventilation cavity 311, the middle of the upper end of the ventilation cavity 311 is provided with a butt joint opening 312, the upper end of the butt joint opening 312 is provided with the butt joint pipe 34 around; the upper end of the butt joint pipe 34 is provided with the extrusion air bag 4; the lower side of the ventilation cavity 311 is uniformly provided with a plurality of ventilation openings 313 around, the lower side of the ventilation opening 313 is respectively provided with the overflow pipe sleeve 32, the lower end of the overflow pipe sleeve 32 is respectively inserted into the liquid suction pipe 33, and the inner diameters of the plurality of liquid suction pipes 33 are different; the lower end of the liquid suction pipe 33 abuts against the upper end surface of the flow guide plate 2; the rotating disc 31 drives the plurality of liquid suction pipes 33 to rotate, and in turn drives the lower end of the plurality of liquid suction pipes 33 to butt joint with the upper end of the upper side flow guide channel 21.

[0021] As Figures 1 to 4 shown, in order to facilitate the rotation of the rotating disc 31, further, the lower end of the rotating disc 31 is provided with a rotating clamping ring 315 around; the upper end of the external positioning frame 1 is provided with a ring-shaped clamping groove 11 around; the rotating disc 31 is rotatably clamped on the ring-shaped clamping groove 11 on the upper end of the external positioning frame 1 through the rotating clamping ring 315 on the lower end. In order to improve the stable rotation of the rotating disc 31, further, the lower side of the ring-shaped clamping groove 11 is provided with a ring-shaped pressing groove 12; the ring-shaped pressing groove 12 is provided with a plurality of extrusion springs 13; the upper end of the extrusion spring 13 is elastically pressed against the lower side of the rotating clamping ring 315.

[0022] As Figures 1 to 4As shown, in order to facilitate the collection of the overflow liquid, further, the upper portion of the pipette 33 and the overflow pipe sleeve 32 are surrounded by an annular overflow groove 321. In order to improve the sealing, further, the lower end of the pipette 33 is provided with a sealing ring. In order to improve the convenience of the rotating disc 31, further, the side of the external positioning frame 1 is provided with a positioning strip 14, which is aligned with the upper side flow channel 21; the rotating disc 31 is uniformly provided with a pair of alignment strips 314, which are aligned with the pipette 33 one by one, so that by observing which alignment strip 314 of the rotating disc is aligned with the positioning strip 14 of the external positioning frame 1, it can be determined which specification of pipette 33 is used. Further, the pipette 33 is made of glass material or plastic polymer material. Further, the longitudinal section of the external positioning frame 1 and the flow guide plate 2 is in H-shaped structure.

[0023] The pipette 5, the lower side flow channel 23, the side flow channel 22, the upper side flow channel 21, and the pipette 33 constitute the entire liquid collection volume, wherein the pipette 33 can be switched to adjust the liquid collection volume, and the rotating disc 31 is rotated to drive the plurality of pipettes 33 to rotate at the upper end of the flow guide plate 2, and the lower end of one of the pipettes 33 is connected to the upper side flow channel 21 of the flow guide plate 2, and the connection of different pipettes 33 can achieve the purpose of switching the capacity, and the adjustment is convenient.

[0024] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid sampling device with switching function, characterized in that, The utility model provides a liquid suction device, including external positioning frame, deflector, rotation switching component, extrusion air bag, pipette, butt joint, external positioning frame is annular cover body structure, the middle installation deflector of external positioning frame, the middle downside of deflector is equipped with downside deflector channel, downside deflector channel's upper end one side is equipped with side deflector channel, and the outer end upper side of side deflector channel is equipped with upside deflector channel, upside deflector channel, side deflector channel, downside deflector channel are sequentially communicated design, the butt joint of downside deflector channel's downside four quarters is installed, and the pipette upper end is inserted in butt joint, rotation switching component is installed in the upside of external positioning frame and deflector, rotation switching component includes rotary disc, butt joint pipe, overflow pipe cover, liquid suction tube, the rotary disc rotary snap connection is installed in the upper end of external positioning frame, the middle inside of rotary disc is equipped with ventilation cavity, and the upper end middle of ventilation cavity is equipped with butt joint opening, and the upper end four quarters of butt joint opening installs butt joint pipe, the upper end of butt joint pipe installs extrusion air bag, the downside four quarters of ventilation cavity is evenly equipped with a plurality of ventilation openings, and the downside of ventilation opening is installed overflow pipe cover respectively, and the lower end of overflow pipe cover is inserted respectively and connects liquid suction tube, and the inner diameter of a plurality of liquid suction tubes is not same, the lower end of liquid suction tube is butt joint in the upper end surface of deflector, rotary disc rotation drives a plurality of liquid suction tubes to rotate, and a plurality of liquid suction tubes lower end are butt joint in the upper end of upside deflector channel in turn, and the upper portion four quarters of liquid suction tube and the four quarters inboard of overflow pipe cover form annular overflow groove between.

2. The liquid sampling device with switching function according to claim 1, characterized in that, The lower end four quarters of rotary disc are equipped with rotary snap connection ring, the upper end four quarters of external positioning frame are equipped with annular clamping groove, and the rotary disc is rotated and is connected in the annular clamping groove of the upper end four quarters of external positioning frame through the rotary snap connection ring of lower end four quarters.

3. The liquid sampling device with switching function according to claim 2, characterized in that, The annular clamping groove is equipped with annular pressure groove below, and a plurality of extrusion springs are arranged in the annular pressure groove, and the upper end of extrusion spring is elastically pressed to the downside of rotary snap connection ring.

4. The liquid sampling device with switching function according to claim 1, characterized in that, The lower end of liquid suction tube is equipped with sealing ring respectively.

5. The liquid sampling device with switching function according to claim 1, characterized in that, One side of external positioning frame is equipped with positioning strip, and the positioning strip is aligned with upside deflector channel, and the four quarters of rotary disc are evenly equipped with two alignment strips, and the alignment strip is aligned with liquid suction tube one to one.

6. The liquid sampling device with switching function according to claim 1, characterized in that, The pipette is made of glass material or plastic macromolecular material.

7. The liquid sampling device with switching function according to claim 1, characterized in that, The longitudinal section of external positioning frame and deflector is H-shaped structure.

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