Multi-head liquid separation device

Abstract

The utility model discloses a multi-head liquid separating device which comprises a piston shell, a quantitative adjusting sleeve and a limiting plate are arranged in the piston shell, the limiting plate is arranged above the quantitative adjusting sleeve, and the quantitative adjusting sleeve is connected to the inner wall of the piston shell in a sliding mode; one end of the gas pipeline is arranged on the bottom wall of the piston shell in a penetrating manner; the bottom end of the piston rod is rotationally connected to the inner wall of the quantitative adjusting sleeve, and the top end of the piston rod extends out of the piston shell; one end of the liquid outlet pipe is connected with a liquid drainage shaft, and an adjusting valve used for adjusting the flow of the liquid outlet pipe is arranged on the liquid outlet pipe; the liquid distribution pipes are connected to the liquid drainage shaft, each liquid distribution pipe is provided with a liquid distribution valve, and the liquid distribution valves are used for starting or closing the liquid distribution pipes. The multi-tube liquid separation is realized, the efficiency is improved, the amount of liquid flowing into each test tube can be accurately controlled, the conditions of excessive adding or missing adding, inaccurate liquid separation and the like are avoided, and the detection result is accurate.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical testing equipment, and in particular relates to a multi-head liquid separation device. Background Art

[0002] In medical laboratories, especially medical testing or scientific research, some projects need to be diluted or pretreated in batches according to the requirements of the test kit, such as manual immunoassay semi-quantitative projects, cell separation, and pre-treatment projects before the machine, in order to meet the purpose of daily testing. The commonly used dispensing device is the bottle-mouth dispenser, which is the most common auxiliary tool in the experiment. Due to its reliability in safety, easy operation, and precise scale, it is widely used in the fields of biology and chemistry, as well as clinical medicine, industry, and commercial laboratories. It can perform highly repetitive dispensing work without wasting reagents, while providing safety guarantees for operators and experimental environments.

[0003] However, the bottle-mouth dispensers currently in use are single-head dispensers, which require manual dispensing of liquids from tube to tube, resulting in a large workload, excessive operating time consumption, and low detection efficiency. They are also prone to over-addition or omission, inaccurate dispensing, etc., which affect the test results. Summary of the invention

[0004] The utility model aims to provide a multi-head liquid dispensing device to solve the problem that liquid dispensing needs to be performed tube by tube at present, which leads to low efficiency and inaccurate liquid dispensing.

[0005] The technical solution is as follows:

[0006] The multi-head liquid separation device of the utility model comprises:

[0007] A piston housing, wherein a quantitative adjustment sleeve and a limit plate are arranged in the piston housing, wherein the limit plate is arranged above the quantitative adjustment sleeve, and the quantitative adjustment sleeve is slidably connected to the inner wall of the piston housing;

[0008] A gas pipeline, one end of which is passed through the bottom wall of the piston housing;

[0009] A piston rod, the bottom end of which is rotatably connected to the inner wall of the quantitative adjustment sleeve, and the top end of which extends to the outside of the piston housing;

[0010] A liquid outlet pipe, one end of which is connected to a liquid discharge shaft, and the liquid outlet pipe is provided with a regulating valve for regulating the flow of the liquid outlet pipe;

[0011] A plurality of liquid dispensing tubes are connected to the liquid dispensing shaft, each of the liquid dispensing tubes is provided with a liquid dispensing valve, and the liquid dispensing valve is used to activate or close the liquid dispensing tube.

[0012] In one embodiment, a connecting shell is further provided, one end of which is connected to the bottom wall of the piston shell, and the other end is used to be connected to the bottle cap of the sample bottle, and the gas pipeline and the liquid outlet pipe both pass through the connecting shell.

[0013] In one embodiment, a threaded bottle cap is further included, wherein the inner side wall of the threaded bottle cap is provided with threads for screwing with the sample bottle, and the top wall of the threaded bottle cap is provided with threads for screwing with the connecting shell.

[0014] In one of the embodiments, a ball is provided on the outer wall of the bottom of the piston rod, a sleeve is fixed on the inner wall of the quantitative adjustment sleeve, and a ball groove cooperating with the ball is provided on the sleeve.

[0015] In one embodiment, the balls are provided in multiple groups and are arranged in a spiral pattern, the sleeve is a threaded sleeve, and multiple groups of ball grooves are provided in the threaded sleeve.

[0016] In one embodiment, the threaded sleeve is a sleeve made of soft material.

[0017] In one embodiment, the regulating valve and the liquid dispensing valve both include: an adjusting sleeve, an adjusting swivel, an adjusting baffle and an adjusting fixing plate, the adjusting baffle and the adjusting fixing plate are installed in the adjusting sleeve, the adjusting baffle is located on one side of the adjusting fixing plate, a through hole is provided on the adjusting baffle, the adjusting swivel is sleeved on the adjusting sleeve, and the adjusting swivel is used to adjust the size of the through hole on the adjusting baffle.

[0018] In one of the embodiments, a through hole for the piston rod to pass through is formed on the top wall of the quantitative adjustment sleeve.

[0019] In one embodiment, a sliding block is provided on the outer wall of the quantitative adjustment sleeve, and a sliding groove is provided on the inner wall of the piston housing.

[0020] In one embodiment, an observation port is provided on the side wall of the piston housing, and a scale is provided on the piston rod.

[0021] The technical solution provided by the utility model has the following advantages and effects:

[0022] By setting a quantitative adjustment sleeve in the piston housing, the liquid output is large, which can meet the pipetting needs of multiple test tubes; the liquid output can be adjusted by rotating the piston rod, and the pipetting amount of each test tube can be accurately controlled; by setting an adjustment piece on the liquid separation tube, it is possible to control which test tubes are pipetted. Therefore, the liquid separation of multiple test tubes can be completed at one time, improving efficiency, and the amount of liquid flowing into each test tube can be accurately controlled to avoid over-addition or omission, inaccurate liquid separation, etc., so that the test results are accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the multi-head liquid dispensing device of the utility model;

[0024] Figure 2 It is a schematic diagram of the regulating valve and the liquid dispensing valve of the utility model.

[0025] Description of reference numerals:

[0026] 1. Medical wide-mouth bottle; 11. Threaded bottle cap; 12. Connecting shell; 13. Piston shell; 2. Dosing assembly; 21. Dosing adjustment sleeve; 22. Limiting plate; 3. Liquid separation assembly; 31. Liquid outlet pipe; 32. Liquid discharge shaft; 4. Adjustment assembly; 41. Adjustment valve; 411. Adjustment sleeve; 412. Adjustment swivel; 413. Adjustment partition; 414. Adjustment fixing plate; 42. Liquid separation valve; 5. Liquid outlet assembly; 51. Piston plate; 52. Piston rod; 53. Gas pipeline; 6. Threaded sleeve; 7. Liquid separation pipe. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0028] Unless otherwise specified or defined, the "first, second..." used in this article is merely used to distinguish names and does not represent a specific quantity or order.

[0029] Unless specifically stated or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] It should be noted that, in this document, “fixed to” or “connected to” may mean directly fixing or connecting to an element, or indirectly fixing or connecting to an element.

[0031] In view of the fact that the existing single-head liquid dispenser needs to manually dispense liquid tube by tube, the liquid dispensing efficiency is low, and it is easy to cause over-addition or omission, inaccurate liquid dispensing, etc., the utility model sets a quantitative adjustment sleeve in the piston housing, and the liquid output is large to meet the pipetting needs of multiple test tubes. The rotating piston rod can adjust the liquid output and can also accurately control the liquid dispensing amount of each test tube. By setting an adjustment part on the liquid dispensing tube, it is possible to control which test tubes are pipetted. That is: it is possible to complete the liquid dispensing of multiple test tubes at one time, improve efficiency, and can accurately control the amount of liquid flowing into each test tube, so that the test results are accurate.

[0032] The multi-head liquid separation device of this embodiment is used for medical examination, and the sample bottle is a medical wide-mouth bottle, but the multi-head liquid separation device is not limited to medical liquid separation, and can also be used in other occasions where liquid in the sample bottle needs to be separated. Figure 1 As shown in FIG. 1 , the main body of the multi-head liquid dispensing device is a piston housing 13, which is a cylindrical body with a hollow interior. A quantitative adjustment sleeve 21 and a limit plate 22 are installed in the piston housing 13. The limit plate 22 is fixed on the inner wall of the piston housing 13 and is located above the quantitative adjustment sleeve 21 (the upper, lower, top and bottom of this embodiment are Figure 1 The quantitative adjustment sleeve 21 is slidably connected to the inner wall of the piston housing 13. Specifically, a slider is provided on the outer wall of the quantitative adjustment sleeve 21, and a slide groove is provided on the inner wall of the piston housing 13. The number of sliders and slide grooves is not limited. Through the cooperation of the slider and the slide groove, the quantitative adjustment sleeve 21 can slide up and down on the inner wall of the piston housing 13. The bottom wall of the quantitative adjustment sleeve 21 forms a piston plate 51, and the limit plate 22 limits the limit position of the quantitative adjustment sleeve 21 sliding upward, that is, it limits the maximum amount of liquid that can be discharged from the sample bottle at one time. In other words, the quantitative adjustment sleeve 21 and the limit plate 22 together form a quantitative component 2.

[0033] A gas pipeline 53 is provided on the bottom wall of the piston housing 13 , and the other side of the gas pipeline 53 extends into the bottle mouth of the medical wide-mouth bottle 1 .

[0034] A piston rod 52 is installed in the quantitative adjustment sleeve 21, and the bottom of the piston rod 52 is rotatably connected to the inner wall of the quantitative adjustment sleeve 21. A through hole is provided on the top wall of the quantitative adjustment sleeve 21, and a through hole is also provided in the center of the limit plate 22. The top of the piston rod 52 passes through the above two through holes and extends to the outside of the piston housing 13 through the top wall of the piston housing 13. The stroke of the piston rod 52 can be adjusted by rotating the piston rod 52, that is, the smaller the distance between the piston rod 52 and the bottom wall of the quantitative adjustment sleeve 21, the shorter the stroke of the piston rod 52, and the less liquid is discharged from the sample bottle at one time; the larger the distance between the piston rod 52 and the bottom wall of the quantitative adjustment sleeve 21, the longer the stroke of the piston rod 52, and the more liquid is discharged from the sample bottle at one time. Therefore, the amount of liquid discharged from the medical wide-mouth bottle 1 can be adjusted by rotating the piston rod 52. For example, assuming that three test tubes need to be pipetted at the same time, and the pipetting volume of each test tube is 10 ml, then the piston rod can be rotated so that the piston rod 52 can be pressed to discharge 30 ml of liquid from the medical wide-mouth bottle 1 at one time.

[0035] Specifically, a ball bearing can be arranged on the outer wall of the bottom of the piston rod 52, a sleeve can be fixed on the inner wall of the quantitative adjustment sleeve 21, a ball bearing groove can be arranged on the sleeve to match the ball bearing, and the piston rod can rotate in the quantitative adjustment sleeve by the rolling of the ball bearing in the ball bearing groove. In this embodiment, the ball bearings are provided in multiple groups and are arranged in a spiral pattern, the sleeve is a threaded sleeve 6, and multiple groups of ball bearing grooves are provided in the threaded sleeve 6. By providing multiple groups of ball bearings and ball bearing grooves, the stability of the piston rod 52 when rotating in the quantitative adjustment sleeve 21 and the stability of the quantitative adjustment sleeve 21 when moving up and down are enhanced.

[0036] In some examples, an observation port is provided on the side wall of the piston housing 13 , and a scale is provided on the piston rod 52 . When the piston rod 52 rotates, the scale can be viewed at the observation port, so as to pre-set the amount of liquid discharged from the medical wide-mouth bottle 1 .

[0037] In some examples, the threaded sleeve 6 is a sleeve made of a soft material (eg, rubber, polyethylene, polypropylene, etc.), and the threaded sleeve 6 is fixed to the inner wall of the quantitative adjustment sleeve 21. By using a soft material, the ball can rotate more quietly and smoothly in the ball groove.

[0038] The liquid dispensing device also includes a liquid outlet pipe 31, one end of which extends into the medical wide-mouth bottle 1, and the other end is connected to a liquid discharge shaft 32. A regulating valve 41 is also provided on the liquid outlet pipe 31 for adjusting the flow of the liquid outlet pipe 31. The piston plate 51, the piston rod 52 and the gas pipeline 53 together form a liquid outlet assembly 5 for discharging the liquid in the medical wide-mouth bottle 1. The liquid outlet pipe 31 and the liquid discharge shaft 32 together form a liquid dispensing assembly 3 for dispensing the liquid discharged from the medical wide-mouth bottle 1 into a plurality of test tubes.

[0039] A plurality of liquid dispensing holes are provided on the liquid dispensing shaft 32, each of which is connected to a liquid dispensing tube 7, and each liquid dispensing tube 7 is provided with a liquid dispensing valve 42, which is used to enable or close the liquid dispensing tube 7. The liquid dispensing valve 42 is used to determine which test tubes to transfer liquid to. The regulating valve 41 and the liquid dispensing valve 42 form a regulating assembly 4, which is used to control the pipeline flow.

[0040] In this embodiment, the bottom of the piston housing 13 is also fixedly connected to a connecting housing 12, which is also a cylinder, and the other end of the connecting housing 12 is connected to the bottle cap of the medical wide-mouth bottle 1. The gas pipeline 53 and the liquid outlet pipe 31 are both extended from the bottom wall of the connecting housing 12 into the medical wide-mouth bottle 1. By providing the connecting housing 12, the piston housing 13 can be more stable when discharging liquid from the medical wide-mouth bottle 1, and the connection between the piston housing 13 and the bottle stopper of the medical wide-mouth bottle 1 is more secure.

[0041] In some examples, the liquid dispensing device further includes a threaded bottle cap 11, the inner side wall of which is provided with threads for being screwed to the medical wide-mouth bottle 1, the top wall of which is provided with threads, and the threaded bottle cap 11 is screwed to the connecting housing 12. A sealing ring is also installed in the threaded bottle cap 11.

[0042] The types of the regulating valve 41 and the liquid separation valve 42 are not limited, as long as they are valves that can adjust the pipeline flow.

[0043] The regulating valve 41 and the liquid separation valve 42 in this embodiment both include: a regulating sleeve 411, a regulating swivel 412, a regulating baffle 413 and a regulating fixed plate 414. The regulating baffle 413 and the regulating fixed plate 414 are installed in the regulating sleeve 411. The regulating baffle 413 is located on one side of the regulating fixed plate 414. The regulating fixed plate 414 forms a support plate for the regulating baffle 413 and can prevent the regulating baffle 413 from deforming or failing under flow impact. Through holes are provided on the regulating baffle 413 and the regulating fixed plate 414. The regulating swivel 412 is sleeved on the regulating sleeve 411. The regulating swivel 412 is connected to the regulating baffle 413. The diameter of the through hole on the regulating baffle 413 can be adjusted, thereby adjusting the flow of the pipeline. In order to more accurately control the amount of liquid in the test tube, a flow meter (not shown in the figure) can also be set between the liquid separation valve 42 and the discharge shaft 32 (i.e., the front end of the liquid separation valve 42). When the flow meter detects that the flow reaches the amount of liquid required by the test tube, the flow meter sends a signal to the liquid separation valve 42, and the liquid separation valve 42 is closed to ensure that the correct amount of liquid is injected into the test tube. Obviously, the flow meter can also be set at the rear end of the liquid separation valve 42. Among them, the associated control between the flow meter and the valve is a conventional technical means, which will not be repeated here.

[0044] When in use, first select a threaded bottle cap 11 of a suitable size, install the threaded bottle cap 11 on the medical wide-mouth bottle 1, and screw the connecting shell 12 onto the threaded bottle cap 11. Open the regulating valve 41 and the liquid dispensing valve 42, lift the piston rod 52 and then put it down, repeat several times, discharge the gas inside the liquid outlet pipe 31, then rotate the piston rod 52, adjust the liquid output each time, and then complete the liquid dispensing by lifting and pressing the piston rod 52. The number of liquid dispensing valves to be opened is determined according to the number of test tubes that need to be dispensed.

[0045] In summary, the use of the liquid separation component and the regulating component enables simultaneous multi-component liquid transfer. The use of the quantitative component and the liquid discharge component not only achieves a large liquid discharge volume, but also allows precise adjustment of the liquid discharge volume each time. Multi-tube pipetting can be performed efficiently and accurately.

[0046] The above embodiments are not exhaustive enumerations based on the present invention, and there may be multiple other implementations not listed. Any replacement and improvement made without violating the concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. A multi-head liquid separation device, characterized in that: include: A piston housing, wherein a quantitative adjustment sleeve and a limit plate are arranged in the piston housing, wherein the limit plate is arranged above the quantitative adjustment sleeve, and the quantitative adjustment sleeve is slidably connected to the inner wall of the piston housing; A gas pipeline, one end of which is passed through the bottom wall of the piston housing; A piston rod, the bottom end of which is rotatably connected to the inner wall of the quantitative adjustment sleeve, and the top end of which extends to the outside of the piston housing; A liquid outlet pipe, one end of which is connected to a liquid discharge shaft, and the liquid outlet pipe is provided with a regulating valve for regulating the flow of the liquid outlet pipe; A plurality of liquid dispensing tubes are connected to the liquid dispensing shaft, each of the liquid dispensing tubes is provided with a liquid dispensing valve, and the liquid dispensing valve is used to activate or close the liquid dispensing tube.

2. The multi-head liquid dispensing device according to claim 1, characterized in that: A connecting shell is also provided, one end of which is connected to the bottom wall of the piston shell, and the other end is used to be connected to the bottle cap of the sample bottle. The gas pipeline and the liquid outlet pipe both pass through the connecting shell.

3. The multi-head liquid dispensing device according to claim 2, characterized in that: It also includes a threaded bottle cap, wherein the inner side wall of the threaded bottle cap is provided with a thread for screwing with the sample bottle, and the top wall of the threaded bottle cap is provided with a thread for screwing with the connecting shell.

4. The multi-head liquid dispensing device according to claim 1, characterized in that: A ball is arranged on the outer wall of the bottom of the piston rod, a sleeve is fixed on the inner wall of the quantitative adjustment sleeve, and a ball groove cooperating with the ball is arranged on the sleeve.

5. The multi-head liquid dispensing device according to claim 4, characterized in that: The balls are provided in multiple groups and are arranged in a spiral manner. The sleeve is a threaded sleeve, and multiple groups of ball grooves are provided in the threaded sleeve.

6. The multi-head liquid dispensing device according to claim 5, characterized in that: The threaded sleeve is a sleeve made of soft material.

7. The multi-head liquid dispensing device according to claim 1, characterized in that: The regulating valve and the liquid-dispensing valve both include: an adjusting sleeve, an adjusting swivel, an adjusting baffle and an adjusting fixing plate. The adjusting baffle and the adjusting fixing plate are installed in the adjusting sleeve. The adjusting baffle is located on one side of the adjusting fixing plate. A through hole is provided on the adjusting baffle. The adjusting swivel is sleeved on the adjusting sleeve. The adjusting swivel is used to adjust the size of the through hole on the adjusting baffle.

8. The multi-head liquid dispensing device according to claim 1, characterized in that: A through hole for the piston rod to pass through is provided on the top wall of the quantitative adjustment sleeve.

9. The multi-head liquid dispensing device according to claim 1, characterized in that: A sliding block is arranged on the outer wall of the quantitative adjustment sleeve, and a sliding groove is arranged on the inner wall of the piston housing.

10. The multi-head liquid dispensing device according to claim 1, characterized in that: An observation port is provided on the side wall of the piston housing, and a scale is provided on the piston rod.

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