Multi-reagent liquid preparation instrument

Abstract

The utility model discloses a multi-reagent liquid preparation instrument, which aims to achieve the purposes of adding liquid to a reagent for detecting a water sample and preparing the liquid according to a proportion. The device comprises an instrument case, a test tube rotating disc assembly, a rocker arm type liquid preparation head assembly and a waste liquid collecting tank, a rotating disc is mechanically connected with an acrylic disc and a magnetic suction cup in a quick-release mode through combined mechanical cooperation of square insertion and a magnetic suction structure, and the magnetic suction cup is mechanically connected with a gear motor and rotates by one station each time; the waste liquid collecting tank is located at the cleaning station; the rocker arm type liquid preparation head assemblies swing, nozzles in the rocker arm type liquid preparation head assemblies swing between the liquid preparation station and the cleaning station and conduct liquid preparation on the test tubes, the number of the rocker arm type liquid preparation head assemblies is at least two, and the rocker arm type liquid preparation head assemblies conduct liquid preparation alternately. The rotating disc, the magnetic suction disc and the acrylic disc are connected in a quick-release mode in the mode that insertion and magnetic suction structures are combined, the cleaning convenience is greatly improved, and tools are not needed in the dismounting process.

Description

TECHNICAL FIELD

[0001] The utility model relates to reagent solution preparation special instrument technical field. BACKGROUND

[0002] In scientific research experiments, it is often necessary to prepare multiple reagents, which can be divided into manual operation and special instrument operation according to different preparation methods. Manual operation does not require the purchase of special instruments, but the process requires high operating skills and high labor intensity, so it has advantages and disadvantages.

[0003] For example, Chinese patent document 202420460188.7 discloses an automatic solution preparation instrument for analysis and detection, which is characterized in that a solvent placement area, an input sample area and an output sample area are provided on the solution preparation tank, a plurality of sampling and sampling needles are provided in the solution preparation tank above the output sample area, a quantitative suction component is provided between the solvent placement area and the plurality of sampling and sampling needles, and between the input sample area and the plurality of sampling and sampling needles, the quantitative suction component is used to suck the solvent in the solvent placement area or the sample in the input sample area into the sampling and sampling needle, and inject it into the output bottle of the output sample area. Its structure is complex, especially not easy to clean and maintain, its use and maintenance cost is relatively high, resulting in a relatively low current popularization rate.

[0004] Therefore, the purpose of the utility model is to provide a special instrument with simple structure, easy to clean and maintain based on the need for solution preparation. INVENTION CONTENTS

[0005] In order to solve the problems of the prior art, the utility model provides a multi-reagent solution preparation instrument, in order to achieve the goal of reagent addition for water sample detection and proportional solution preparation, and the structure is simple and easy to clean.

[0006] The technical scheme adopted by the utility model to solve its technical problems is:

[0007] A multi-reagent solution preparation instrument, comprising an instrument case and a test tube turntable assembly, a rocker arm type solution preparation head assembly and a waste liquid collection tank installed on the instrument case, characterized in that: the test tube turntable assembly comprises a turntable, a magnetic suction disc and an acrylic disc, wherein the turntable is fast disassembled and mechanically connected with the acrylic disc and the magnetic suction disc through square plug-in and magnetic suction structure combination mechanical cooperation, the magnetic suction disc is mechanically connected with a speed reducer motor and rotates one station at a time; the waste liquid collection tank is located in a cleaning station; the rocker arm type solution preparation head assembly has a swinging action, the nozzle in the rocker arm type solution preparation head assembly swings between a solution preparation station and a cleaning station and prepares solution for the test tube, and the number of the rocker arm type solution preparation head assembly is at least two groups, which alternately performs solution preparation action, when the number is three, three kinds of reagents can be configured, and similarly four groups and five groups can be configured, thereby realizing the configuration of multiple reagents for water samples.

[0008] Further, the rocker arm type liquid preparation head assembly comprises a vertical plate, a direct current stepper motor, a rocker arm, a sliding block, a rocker and a nozzle, the lower end of the rocker arm is hingedly installed on the vertical plate, a sliding block is arranged in the linear sliding groove of the middle section of the rocker arm, the sliding block is movably connected with the rocker, the rocker is fixedly connected with the motor shaft of the direct current stepper motor, the upper section of the rocker arm extends to the outside of the instrument cabinet and is fixedly installed with an arc-shaped rod, the nozzle is installed on the arc-shaped rod, the nozzle is connected with a precision syringe pump through a hose, and the precision syringe pump is connected with a reagent bottle through a hose.

[0009] Further, a travel switch is arranged on the vertical plate to limit the swing amplitude of the rocker arm.

[0010] Further, the upper end face of the magnetic suction disc is provided with a first square protrusion, and a first magnet block is embedded in the central position of the first square protrusion.

[0011] Further, the rotating disc has an annular placing groove, the annular placing groove has a mounting step, and the step is provided with a clamping groove disc.

[0012] Further, the rotating disc has a mounting portion, square grooves are arranged at the upper and lower ends of the mounting portion, and a second magnet block is embedded in the square grooves, the second magnet block realizes magnetic attraction with the upper and lower magnets, and realizes axial stress.

[0013] Further, the acrylic disc has a second square protrusion, and a third magnet block is arranged in the central position of the second square protrusion.

[0014] Further, a magnetic stirring unit is arranged in the instrument cabinet below the liquid preparation station, the magnetic stirring unit is composed of a high-strength magnet block and a direct current motor, the high-strength magnet block is arranged on the motor shaft of the motor, and another strong magnet strip is placed in the test tube, and the magnetic stirring unit realizes stirring of the water sample in the test tube.

[0015] Further, the waste liquid collecting tank is quickly mounted on the instrument cabinet through clamping.

[0016] Further, the waste liquid collecting tank is connected with a waste liquid collecting barrel through a hose.

[0017] The beneficial effects of the utility model are as follows:

[0018] The present technology can effectively improve the liquid preparation efficiency by combining the use of at least two groups of rocker arm type liquid preparation head assemblies and test tube rotating disc assemblies, and each group of rocker arm type liquid preparation head assemblies can extract one type of reagent.

[0019] The turntable, magnetic suction cup and acrylic plate in this technology are quickly connected by a combination of plug-in and magnetic suction structures, which greatly improves the convenience of cleaning. No tools are required during the disassembly process, making the structure simple.

[0020] Other technical effects of this technology will be further explained in conjunction with the embodiments of the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional diagram of the present invention, showing the front effect.

[0022] Figure 2 This is a three-dimensional diagram of the present invention, showing the effect of the back side.

[0023] Figure 3 A top view of the present invention.

[0024] Figure 4 for Figure 3 The cross-sectional view at A--A shows the nozzle in the cleaning station.

[0025] Figure 5 The nozzle is shown at the dispensing station.

[0026] Figure 6 for Figure 3 Cross-sectional view at B--B in the middle.

[0027] Figure 7 This is a three-dimensional display diagram of the driving mechanism in the test tube turntable assembly.

[0028] Figure 8 A three-dimensional diagram of a turntable.

[0029] Figure 9 A top view of the turntable.

[0030] Figure 10 A cross-sectional view of the turntable.

[0031] Figure 11 A perspective view of the acrylic plate, showing the top view.

[0032] Figure 12 A perspective view of the acrylic plate, showing the bottom view.

[0033] Figure 13 It is a three-dimensional diagram of the waste liquid collection tank.

[0034] Figure 14 This is a three-dimensional view of the rocker-type liquid dispensing head assembly, showing the back structure.

[0035] Figure 15 This is the front view of the rocker-type liquid dispensing head assembly.

[0036] Figure 16 Structure diagram for Example 2.

[0037] In the figure:

[0038] 100, instrument case; 200, test tube turntable assembly; 210, turntable; 211, annular placement groove; 212, No. 2 magnet block; 220, magnetic suction disc; 221, No. 1 magnet block; 230, acrylic disc; 231, insertion slot; 232, No. 3 magnet block; 240, clamping groove disc; 250, speed reducer motor; 260, coupling; 270, motor support; 280, magnetic stirring unit; 300, rocker-type liquid preparation head assembly; 310, vertical plate; 320, direct current stepper motor; 330, rocker arm; 331, straight-line sliding groove; 332, arc-shaped rod; 333, tube clamp; 340, sliding block; 350, rocker lever; 360, nozzle; 370, travel switch; 380, precision syringe pump; 390, medicament bottle; 400, waste liquid collection groove; 410, waste liquid collection barrel; 500, test tube. DETAILED DESCRIPTION

[0039] This embodiment details a multi-reagent liquid preparation instrument, which is mainly aimed at the liquid preparation equipment for COD detection experiments and the like. The instrument completes the medicament addition and proportional liquid preparation process for water samples. The design performance of the product meets the requirements of the national environmental protection industry standards and can meet the various needs of different users.

[0040] This embodiment will illustrate the attached drawings of the specification Figure 1 to the attached drawings Figure 15 will be described in detail, and technical reproduction is sought. Regarding the mechanical design architecture of the instrument, the instrument case 100 is a galvanized sheet metal assembly, which is fixed by screws. Three cavities are formed in the instrument case 100, wherein the first cavity is the installation space of the test tube turntable assembly 200, the second cavity is the installation space of the rocker-type liquid preparation head assembly 300, and the third cavity is the installation space of the control circuit board and the electronic control module. The appearance profile of the instrument case 100 in this embodiment is exemplary, and in actual design, there are more appearance configurations. This embodiment will not be introduced one by one, and all should be protected.

[0041] The test tube turntable assembly 200 comprises a turntable 210, a magnetic suction disc 220, an acrylic disc 230, a clamping groove disc 240, a speed reducer motor 250, a shaft coupling 260 and a motor support 270. It is a rotatable functional component, which is used to place and rotate the test tube 500. The speed reducer motor 250 is vertically installed in the instrument cabinet 100 through the motor support 270. The motor shaft of the speed reducer motor 250 is provided upward and is installed with a magnetic suction disc 220 through the shaft coupling 260. The magnetic suction disc 220 is a circular disc, which has a square protrusion on the upper end surface and a No. 1 magnet block 221 embedded in the central position of the square protrusion. The magnetic suction disc 220 and the square protrusion are used for quick plug-in installation and adsorption installation of the turntable 210, which is a quick disassembly and assembly structure.

[0042] The turntable 210 is an injection molded part made of hard plastic, which has the advantages of light weight, waterproof and corrosion resistance. The turntable 210 has a concave annular storage groove 211, which is composed of two annular side walls and a bottom plate. The storage groove is used to place the test tube 500, and it is also convenient to clean after storing liquid in the storage groove. The central position of the turntable 210 is an installation part, which is located at the center position of the annular storage groove 211. The installation part is provided with a magnetic suction structure. Specifically, square grooves are arranged at the upper and lower ends of the installation part. The square groove at the lower end is used for plug-in cooperation with the square protrusion on the magnetic suction disc 220. The square groove at the upper end is used for plug-in cooperation with the square protrusion of the upper acrylic disc 230. A No. 2 magnet block 212 is embedded in the installation part, and a magnet block is embedded in the central position of the above-mentioned acrylic disc 230. The three magnet blocks in the above-mentioned turntable 210, magnetic suction disc 220 and acrylic disc 230 are magnetically attracted and cooperated.

[0043] Further, a square protrusion is arranged on the lower surface of the acrylic disc 230, and a No. 3 magnet block 232 is embedded in the central position of the square protrusion. The No. 3 magnet block 232 is used for quick adsorption installation of the turntable 210.

[0044] Further, the above-mentioned acrylic disc 230 has twelve insertion slots 231 for placing the test tube 500, which are circular holes. The acrylic disc 230 is made of acrylic material, which can observe the color change in the test tube 500 and avoid human operation errors. The double-layer structure can insert twelve test tubes 500.

[0045] Further, the annular placing groove 211 of the rotating disc 210 has an inner wall installation step, and a clamping groove disc 240 is clamped at the step, and the clamping groove disc 240 is also provided with twelve insertion grooves 231 for placing test tubes 500. The combination of the clamping groove disc 240 and the acrylic disc 230 realizes the quick fixing of the test tubes 500. And the clamping groove disc 240 and the acrylic disc 230 are designed with quick release structure, which can be easily removed and cleaned.

[0046] Further, the speed reduction motor 250 in the embodiment is driven by a speed reduction stepper motor, and has double shaft output with an encoder. Compared with ordinary motors, it saves space while being simple and practical, and can accurately control the number of rotating steps of the rotating disc 210, meeting the requirement of rotating by 30 degrees each time, that is, rotating one station position each time.

[0047] One of the twelve test tube insertion grooves is a liquid preparation station, and a magnetic stirring unit 280 is installed below the liquid preparation station, that is, in the space below the station. The magnetic stirring unit 280 is composed of a high-strength magnetic block and a DC motor, and the DC motor is installed on the bottom plate through a motor base, and the high-strength magnetic block is installed on the motor shaft of the motor. When in use, another strong magnetic strip is placed in the test tube 500, which acts as a stirring rod. When the DC motor rotates at high speed, it drives the strong magnetic strip to rotate at high speed. When liquid is dropped into the test tube 500, the reagent and the sample to be tested are stirred to achieve rapid mixing.

[0048] The reagents required for preparation in the embodiment are two, and the corresponding rocker-type liquid preparation head assembly 300 is two groups, which is used for the preparation of two different raw materials. It can also be three or four groups, which is used for the preparation of three or four different raw materials.

[0049] Further improvement, such as Figure 16 The rocker-type liquid preparation head assembly 300 in the second embodiment is designed as four groups, which can realize the preparation of four different reagents. Therefore, it is conceivable that it can be designed as three or five groups under appropriate circumstances, which is within the protection scope of the technology.

[0050] The rocker arm type liquid preparation head assembly 300 comprises a vertical plate 310, a direct current stepper motor 320, a rocker arm 330, a sliding block 340, a rocker lever 350 and a nozzle 360, wherein the vertical plate 310 is installed in the instrument cabinet 100 and vertically arranged. A rocker arm 330 is installed on the front of the vertical plate 310, the lower end of the rocker arm 330 is hingedly installed on the vertical plate 310 and vertically arranged, and a linear sliding groove 331 is arranged in the middle segment of the rocker arm 330, which is a structural feature of the rocker arm 330 and is arranged along the length direction of the rocker arm 330. The sliding block 340 is installed in the linear sliding groove 331 and has a sliding action, and a pin hole is arranged on the sliding block 340, through which a steel pin is movably hingedly connected to a rocker lever 350. The direct current stepper motor 320 is installed on the back of the vertical plate 310, and the motor shaft of the direct current stepper motor 320 is mechanically fixedly connected to the rocker lever 350, that is, one end of the rocker lever 350 is driven by the direct current stepper motor 320. The specific process is that the direct current stepper motor 320 drives the rocker lever 350 to rotate, the rocker lever 350 drives the rocker arm 330 to swing through the sliding block 340, and further, a travel switch 370 is arranged on the front of the vertical plate 310 to limit the swing amplitude of the rocker arm 330, the travel switch 370 is used to limit the front and back limit positions of the rocker arm 330, and control the start and stop and turning direction of the direct current stepper motor 320, so as to realize the position control of the nozzle 360. The vertical plate 310, the direct current stepper motor 320, the sliding block 340, the rocker lever 350 and the middle and lower segments of the rocker arm 330 are all located inside the instrument cabinet 100, the upper segment of the rocker arm 330 extends to the outside of the cabinet, and an arc-shaped rod 332 is fixedly installed at the top end of the rocker arm 330, which is an upward arch-shaped structure. A nozzle 360 is fixed at the front end of the arc-shaped rod 332, which is arranged downward, and at least one pipe clamp 333 is arranged on the arc-shaped rod 332 for fixing the hose. Further, a precision syringe pump 380 is arranged on the back side of the cabinet, that is, the rear side, the liquid inlet of the precision syringe pump 380 is connected to the medicine bottle 390 through the hose, and the liquid outlet is connected to the nozzle 360 through the hose. It is easy to understand that under the driving of the direct current stepper motor 320, the rocker arm 330 is driven by the rocker lever 350 to swing within a set angle, and the two limit positions correspond to the liquid preparation station and the cleaning station. In the present technology, the precision syringe pump 380 is used to realize automatic liquid addition of the medicine.

[0051] The rocker-type liquid preparation head assembly 300 in the embodiment is two groups, and the nozzles 360 in the two groups of the rocker-type liquid preparation head assembly 300 titrate the liquid preparation test tube 500 in a cross manner. The two rocker-type liquid preparation head assemblies 300 are arranged in an inclined manner, specifically, the two rocker-type liquid preparation head assemblies 300 are arranged at a certain angle. In the embodiment, the two groups of the rocker-type liquid preparation head assembly 300 correspond to one medicine bottle 390 respectively, so that the proportioning of two kinds of medicines is realized.

[0052] The control circuit board preferably uses a single-chip microcomputer, cooperates with the touch screen to operate, realizes one-key control, and displays the liquid adding and titration states in real time.

[0053] Under the driving of the direct current stepper motor 320, the rocker 350 drives the rocker arm 330 to swing within a set angle. The nozzle 360 has two stroke positions in the swinging process, which are marked as a liquid preparation position and a cleaning position. The liquid preparation position is the position for titrating medicine, and the cleaning position is used for cleaning the hose and the nozzle 360. A waste liquid collecting groove 400 is arranged below the nozzle 360 at the cleaning position. The waste liquid collecting groove 400 is quickly installed on the instrument case 100 through clamping, is located at the lowermost position of the cleaning position, and is a detachable structure. The waste liquid collecting groove 400 is connected to a larger waste liquid collecting barrel 410 through a hose. The cleaning waste liquid in the collecting groove is collected into the waste liquid collecting barrel 410. After the liquid preparation experiment is completed, the nozzle 360 can be moved to the cleaning position, the medicine bottle 390 is replaced with a water bottle, and the pump and the hose are cleaned, so that the next batch of experiments can be performed.

Claims

1. A multi-reagent dispensing instrument, comprising an instrument chassis (100), a test tube turntable assembly (200), a rocker-type dispensing head assembly (300), and a waste liquid collection tank (400) mounted on the instrument chassis (100), characterized in that: The test tube turntable assembly (200) comprises a turntable (210), a magnetic chuck (220) and an acrylic plate (230), wherein: The turntable (210) is mechanically connected to the acrylic plate (230) and the magnetic chuck (220) in a quick-release manner. The magnetic chuck (220) is mechanically connected to the reduction motor (250) and rotates one station at a time. The waste liquid collection tank (400) is located at the cleaning station. The rocker-type liquid dispensing head assembly (300) has a swinging motion. The nozzle (360) in the rocker-type liquid dispensing head assembly (300) swings between the liquid dispensing station and the cleaning station and dispenses liquid to the test tube. The rocker-type liquid dispensing head assembly (300) is provided in at least two groups, which perform the liquid dispensing motion alternately.

2. A multi-reagent dispensing instrument according to claim 1, characterized in that: The rocker-type dispensing head assembly (300) includes a vertical plate (310), a DC stepping motor (320), a rocker arm (330), a slider (340), a rocker (350) and a nozzle (360), wherein the lower end of the rocker arm (330) is hingedly mounted on the vertical plate (310), and a slider (340) is arranged in a linear slide groove (331) in the middle section of the rocker arm (330), the slider (340) is movably connected to the rocker arm (350), the rocker arm (350) is fixedly mechanically connected to the motor shaft of the DC stepping motor (320), and the upper section of the rocker arm (330) extends to the outside of the instrument case (100) and is fixedly mounted with an arc rod (332), the arc rod (332) is mounted on the nozzle (360), the nozzle (360) is connected to a precision injection pump (380) through a hose, and the precision injection pump (380) is connected to a medicine bottle (390) through a hose.

3. A multi-reagent dispensing instrument according to claim 2, characterized in that: A travel switch (370) for limiting the swing amplitude of the rocker arm (330) is provided on the vertical plate (310).

4. A multi-reagent dispensing instrument according to claim 3, characterized in that: The upper end surface of the magnetic suction cup (220) is provided with a No. 1 square protrusion, and a No. 1 magnet block (221) is embedded in the center of the No. 1 square protrusion.

5. A multi-reagent dispensing instrument according to claim 4, characterized in that: The rotating disk (210) has an annular storage groove (211), and a mounting step is provided in the annular storage groove (211), and the slot disk (240) is mounted on the step.

6. A multi-reagent dispensing instrument according to claim 5, characterized in that: The turntable (210) has a mounting portion, wherein the upper and lower ends of the mounting portion are provided with square grooves, and a No. 2 magnet block (212) is embedded in the square groove.

7. A multi-reagent dispensing instrument according to claim 6, characterized in that: The acrylic plate (230) has a second square protrusion, and a third magnet block (232) is arranged at the center of the second square protrusion.

8. A multi-reagent dispensing instrument according to claim 1, characterized in that: A magnetic stirring unit (280) is installed in the instrument case (100) below the liquid preparation station. The magnetic stirring unit (280) is composed of a high-strength magnetic block and a DC motor. The high-strength magnetic block is installed on the motor shaft of the motor, and another strong magnetic strip is placed in the test tube (500).

9. A multi-reagent dispensing instrument according to claim 1, characterized in that: The waste liquid collection tank (400) is mounted on the instrument case (100) by snap-fitting.

10. The multi-reagent dispensing instrument according to claim 9, characterized in that: The waste liquid collection tank (400) is connected to the waste liquid collection barrel (410) via a hose.

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