Chromatographic column solvent recovery device matched with high performance liquid chromatography analyzer

Abstract

A chromatographic column solvent recovery device matched with a high performance liquid chromatography analyzer for use comprises a liquid pump, a motor reducing mechanism, a solvent recovery tank, a distribution valve, a bottom plate and an electromagnetic valve, a prompting mechanism is also arranged; the solvent recovery tank is provided with a plurality of independent tank separation bins, the distribution valve comprises a volute, a hollow valve seat, a liquid pump, a volute of the distribution valve and a shell of the prompting mechanism which are installed together, the motor speed reducing mechanism is longitudinally and sequentially installed on a bottom plate, and the bottom plate is installed on the detection table; and a display circuit matched with the prompting mechanism is arranged in the element box. A worker only needs to simply operate a power switch, a corresponding waste solvent after detection can be conveniently pressurized and discharged into a corresponding solvent recovery device at any position through a liquid pump, specifically, after the motor speed reducing mechanism drives the valve seat to rotate by an angle, a liquid discharging hole of the valve seat is communicated with a corresponding liquid conveying pipe, and the liquid conveying pipe is communicated with the liquid conveying pipe. And one corresponding light emitting diode can emit light to prompt detection personnel, so that the subsequent corresponding waste solvent can enter one corresponding tank separation bin.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary equipment for liquid chromatography analyzers, in particular to a chromatographic column solvent recovery device for supporting use with a high-performance liquid chromatography analyzer. Background Art

[0002] A high-performance liquid chromatography analyzer is a device that detects and analyzes substances by introducing gas chromatography theory on the basis of a classical chromatography analyzer. Technically, a high-performance liquid chromatography analyzer has higher detection sensitivity than an ordinary chromatography analyzer and can continuously detect the effluent. Specifically, when a high-performance liquid chromatography analyzer works, its supporting liquid pump sucks the solvent (i.e., the mobile phase) in the liquid storage tank and then outputs it into the injector. The analyte (the analyte, filler, and a small amount of liquid isopropanol are pre-pressed into a chromatography column) is pre-installed in the injector of the high-performance liquid chromatography analyzer. The mobile phase (the substance that carries the component to be measured forward during the detection process of the chromatography column, such as liquid acetonitrile-aqueous solution, acetonitrile-acetic acid aqueous solution, methanol-aqueous solution, acetonitrile-phosphoric acid aqueous solution, dichlorobenzene, N,N-dimethylformamide, isopropanol, etc., which vary) is injected through the upper liquid inlet pipe of the injector and passes through the chromatography column (chromatography column) located in the injector. After the analyte is separated by the chromatography column, it flows out through the lower liquid outlet pipe of the injector and enters the detector of the high-performance liquid chromatography analyzer. The signal detected by the detector is collected and processed by the data processing equipment supporting the high-performance liquid chromatography analyzer, and the chromatogram of the detected substance is recorded, thereby obtaining the composition of the detected substance. The waste solvent after detection flows out through the liquid outlet pipe at the lower end of the detector into an external solvent recovery tank, and the subsequent solvent is used for other purposes (the separated waste solvent can be reused after being processed by other processes).

[0003] When the high-performance liquid chromatography analyzer detects different types of analytes, solvents suitable for different analytes need to be used. Therefore, each time an analyte is detected, a corresponding waste solvent recovery tank needs to be placed under the lower part of the liquid outlet pipe at the lower end of the detector to receive the solvent, or the end of the hose connected to the lower part of the liquid outlet pipe needs to be moved to insert into the upper liquid inlet end of a corresponding solvent recovery tank, so as to discharge the corresponding waste solvent into the corresponding solvent recovery tank. For the above operations, since the detection personnel need to manually displace the solvent recovery tank or displace and insert the hose, etc., it will bring inconvenience to the detection personnel, which is not conducive to improving the detection efficiency. Moreover, the waste solvent flowing out of the liquid outlet pipe at the lower end of the detector has no pressure and enters the solvent recovery tank by gravity, so the solvent recovery tank must be placed at a lower position, which will bring inconvenience to the actual application. For example, there are other items placed under the detection table, it is not convenient to place multiple solvent recovery tanks, or after placing multiple solvent recovery tanks, it will have an adverse impact on the detection and passage work of the detection personnel. In summary, it is very necessary to provide a solvent recovery device with a compact structure, which can bring convenience to the detection personnel and does not require the solvent recovery tank to be placed at a low position. Summary of the Utility Model

[0004] In order to overcome the disadvantages of the existing high-performance liquid chromatography analyzer due to the lack of a suitable waste solvent recovery device as described in the background, the present utility model provides a chromatographic column solvent recovery device for supporting a high-performance liquid chromatography analyzer, which, under the combined action of relevant mechanisms, only requires the staff to simply operate the power switch, and can conveniently discharge a corresponding waste solvent after detection into a corresponding solvent recovery tank at any position (either at a low position on the ground or at a high position on the detection table), which not only brings convenience to the detection personnel, but also improves the detection efficiency accordingly.

[0005] The technical solution adopted by the present utility model to solve its technical problems is:

[0006] A chromatographic column solvent recovery device used in conjunction with a high-performance liquid chromatography analyzer, comprising a liquid pump, a motor reduction mechanism, a solvent recovery tank, a distribution valve, a bottom plate, and a solenoid valve; characterized in that it further has a prompting mechanism; the solvent recovery tank has a plurality of independent sub-tank compartments, and a liquid inlet pipe and a one-way air valve are respectively installed at the upper end of each sub-tank compartment, and a valve is respectively installed at the front lower end of each sub-tank compartment. The solvent recovery tank is placed on the upper end of the detection table; the distribution valve includes a volute and a hollow valve seat. There is an opening at the rear side end of the volute, and a bearing seat is installed at the outer side end of the opening. A connecting shaft is installed outside the rear end of the valve seat, and the connecting shaft is installed in the inner ring of the bearing of the bearing seat; a liquid inlet pipe A is installed at the front end of the valve seat, and the rear side of the liquid inlet pipe A and the inner lower end of the drain hole on the outer side of the valve seat are installed together; a plurality of liquid delivery pipes are installed at equal distances in a circular interval on the outer side of the volute, and the upper ends of the plurality of liquid delivery pipes and the liquid inlet pipes of the plurality of sub-tank compartments are respectively connected by pipelines. The volute is equipped with a sealing plate, and the sealing plate has an opening. A sleeve is installed outside the opening, and a bearing is installed at the inner rear side of the sleeve. The front side of the liquid inlet pipe A is installed in the inner ring of the bearing. The sealing plate is installed at the front end of the volute. The liquid discharge port of the liquid pump is connected to one end of the solenoid valve, and the other end of the solenoid valve is connected to the front side of the sleeve. The liquid inlet port of the liquid pump is connected to the liquid outlet pipe of the detector of the high-performance liquid chromatography analyzer by a pipeline. The liquid pump, the volute of the distribution valve, the housing of the prompting mechanism, and the motor reduction mechanism are longitudinally installed on the bottom plate in sequence, and the bottom plate is installed on the detection table; the display circuit supporting the prompting mechanism is installed in the component box.

[0007] Further, a sealing rubber ring is installed at the outer side end of the valve seat, and the outer side of the sealing rubber ring is in sealing rotational contact with the inner side of the volute.

[0008] Further, the prompting mechanism includes a housing, a shaft rod, and a display circuit. Bearings are respectively installed at the front and rear side ends of the housing. The front and rear ends of the shaft rod are respectively installed in the inner rings of the two bearings. The outer sides of the front and rear ends of the shaft rod are respectively installed together with the rear end of the connecting shaft of the valve seat and the front end of the rotating shaft of the motor reduction mechanism. A support rod is installed in the middle of the shaft rod, and a magnet is installed at the upper end of the support rod. There are multiple sets of display circuits, and each set of display circuits is equipped with a reed switch. The multiple reed switches are distributed at equal distances in a circular interval and installed at the inner side end of the housing.

[0009] Further, the reed switch is a normally open contact reed switch.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: For the present new type, the staff only need to perform a simple power switch operation, and can conveniently discharge a corresponding waste solvent after detection into a corresponding solvent recovery tank at any position (either at a low position on the ground or at a high position on the detection table) through liquid pump pressurization. Specifically, when the motor reduction mechanism drives the valve seat to rotate by an angle, after the liquid discharge hole of the valve seat communicates with a corresponding infusion tube, a corresponding light-emitting diode emits light to prompt the detector, ensuring that the subsequent corresponding waste solvent can enter a corresponding sub-tank bin. The present new type not only brings convenience to the detector, but also improves the detection efficiency accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0012] Figure 1 It is a schematic diagram of the overall planar structure of the present utility model.

[0013] Figure 2 It is a schematic diagram of the partial three-dimensional structure of the present utility model.

[0014] Figure 3 It is a circuit diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Figure 1 、 2, as shown in Figures 3, the chromatographic column solvent recovery device used in conjunction with a high-performance liquid chromatography analyzer includes a liquid pump M, a power supply module A1, power switches S1, S2, and S3, a motor reduction mechanism M1, a solvent recovery tank 2, a distribution valve 3, a bottom plate 4, and a solenoid valve DC; it also has a prompting mechanism; the inside of the solvent recovery tank 2 is a hollow structure, and a plurality of partition plates are hermetically welded at certain intervals inside the tank to divide the solvent recovery tank into twelve independent and sealed sub-tank compartments 21. At the upper end of each sub-tank compartment 21, a liquid inlet pipe 22 and a one-way air valve 23 that communicate with its interior are respectively installed (the intake pipe of the one-way air valve communicates with the inside of the sub-tank compartment, and its main function is to discharge the air in the sub-tank compartment 21 so that the waste solvent liquid can enter the sub-tank compartment 21). At the front side of the lower end of each sub-tank compartment, a manual valve 24 that communicates with its interior is respectively installed (after opening the valve 24, the waste solvent in the corresponding sub-tank compartment flows out into the corresponding container. After the waste solvent is collected by the container and processed through other processes, it can be reused). The solvent recovery tank 2 is placed on the upper end of the test bench and is located on the side of the high-performance liquid chromatography analyzer; the distribution valve includes a volute 31 and a hollow circular valve seat 32. There is an opening in the middle of the rear end of the volute 31, and a bearing seat 312 is welded to the outer end of the opening (sealing rings are installed on both the left and right sides between the inner and outer rings of the bearing of the bearing seat to prevent the waste solvent in the volute from escaping). The valve seat 32 is rotatably installed in the volute 31. A connecting shaft 321 is longitudinally welded to the outer side of the rear end of the valve seat 32. The middle of the connecting shaft 321 is tightly sleeved in the inner ring of the bearing of the bearing seat 312, and the rear end of the connecting shaft 321 is located outside the rear end of the bearing seat 312; a liquid inlet pipe A322 that communicates with its interior is welded to the middle of the front end of the valve seat 32, and the rear end of the liquid inlet pipe A322 is located inside the valve seat 32. The rear side of the "˩"-shaped liquid inlet pipe A322 and the inner lower end of a drain hole 323 distributed in the middle of the outer side of the valve seat are hermetically welded together (the drain hole 323 communicates with the inside of the liquid inlet pipe A322).Twelve liquid infusion pipes 311 that communicate with the inside are welded at equal distances in the outer annular interval of the volute. The upper ends of the twelve liquid infusion pipes 311 and the liquid inlet pipes 22 at the upper parts of the twelve sub-tanks 21 are respectively connected by hoses. The volute is equipped with a sealing plate 313. A plurality of screw holes are distributed at equal distances in the circumferential direction around the outer side of the front end of the volute 31. A plurality of fixing holes are distributed at equal distances in the circumferential direction around the sealing plate 313 (a plurality of bolts are respectively screwed into the plurality of screw holes of the volute through the plurality of fixing holes of the sealing plate to seal and install the sealing plate at the front end of the volute). There is an opening in the middle of the sealing plate 313, and a sleeve 314 is welded outside the opening. A bearing 315 is tightly sleeved on the inner side of the rear of the sleeve 314 (sealing rings are installed on the left and right sides between the inner and outer rings of the bearing 315 to prevent the waste solvent in the volute from overflowing). The front part of the liquid inlet pipe A322 is tightly sleeved on the inner ring of the bearing 315. The liquid discharge port of the liquid pump M and one end of the solenoid valve DC are connected by threads. The other end of the solenoid valve DC is threadedly connected to the front side end of the sleeve 314 (the front end of the valve seat rotates along the inner ring of the bearing 315, and the solenoid valve DC does not rotate). The liquid inlet of the liquid pump M and the detector liquid outlet pipe of a high performance liquid chromatography analyzer (not shown in the figure) are connected by a pipeline. The liquid pump M, the volute 31 at the lower end of the distribution valve (actually, the rear outer side end of the volute and the front outer side end of the housing 51 are connected together), the housing 51 of the prompting mechanism, and the motor reduction mechanism M1 are longitudinally installed on the bottom plate 4 in sequence. The bottom plate 4 is installed on the test bench; the power supply module A1, the power switches S1, S2, S3, and the display circuit 52 supporting the prompting mechanism are installed on the circuit board in the component box 53. The component box 53 is installed on the rear side end of the bottom plate 4.;

[0016] Figure 1 、 2, as shown in FIGS. 3, an annular sealing and wear-resistant rubber ring 324 is adhesively bonded to the outer end of the valve seat (for sealing, so that the solvent can enter the infusion tube through the liquid inlet tube A322 and the liquid discharge hole 323 in the valve seat). The sealing rubber ring 324 has an opening with the same inner diameter as the liquid discharge hole 323 at the position corresponding to the liquid discharge hole 323 of the valve seat. The outer side of the sealing rubber ring 324 is in sealed rotational contact with the inner side of the volute 31. The prompting mechanism includes a hollow housing 51, a shaft rod 54, and a display circuit 52. A bearing 55 is respectively installed in the middle of the front and rear ends of the housing 51. The front and rear ends of the shaft rod 54 are respectively tightly sleeved in the inner rings of the bearings 55. The front and rear outer ends of the shaft rod 54 are respectively welded to the rear end of the connecting shaft 321 at the rear end of the valve seat and the front end of the rotating shaft of the motor reduction mechanism M1. A support rod 56 is welded to the middle of the shaft rod. A rectangular permanent magnet CT is adhesively bonded to the upper end of the support rod 56. There are twelve sets of display circuits 52. Each set of display circuits is equipped with a reed switch GHN. Twelve reed switches GHN are annularly spaced at equal distances and longitudinally adhesively bonded to the middle of the inner side end of the housing 51. The lower end of a corresponding reed switch GHN and the upper end of the magnet CT in the rotated-in place are spaced by a distance (2 mm), and the reed switch GHN and the magnet CT are in the same vertical plane. The reed switch GHN is a normally open contact reed switch. The static contact of the reed switch GHN is located at the lower end, and the moving contact is located at the upper end. The leads connected to the twelve reed switches GHN are led outwards through twelve openings annularly distributed on the housing 51.

[0017] Figure 1 , 2 , as shown in FIGS. 3, each set of display circuits includes a resistor RN and a light-emitting diode VLN connected by circuit board wiring. The positive pole of the light-emitting diode VLN is connected to one end of the resistor RN. The light-emitting surfaces of the twelve light-emitting diodes VLN are respectively located outside the twelve openings at the front side end of the component box. The lower side end of each light-emitting diode VLN is marked with a number representing a corresponding position sub-tank 21 on the component box 53. The number of the infusion tubes 311, sub-tanks 21, and display circuits 52 of the volute is the same. The twelve reed switches GHN and the twelve infusion tubes 311 are annularly distributed and longitudinally in a straight line respectively. The inner diameter of the liquid discharge hole 323 is smaller than the inner diameter of the infusion tube 311. The magnet CT and the liquid discharge hole 323 are in a straight line front and back. The power input end of the liquid pump M is connected in series through the first power switch S1. The power input ends 1 and 2 of the power module A1 and the two poles of the AC 220V power supply are respectively connected by wires. The power output ends 3 and 4 of the power module A1 are respectively connected by wires to the power input ends of the other two power switches S2 and S3 and the power input ends of the twelve sets of display circuits, one end of the reed switch GHN and the negative pole power input end of the light-emitting diode VLN. The other ends of the reed switches GHN of the twelve sets of display circuits and the other ends of the resistors RN of the twelve sets of display circuits are respectively connected by wires. The power output end of the power switch S2 and the power output end of the power switch S3 are respectively connected by wires to the power input ends of the motor reduction mechanism M1 and the solenoid valve DC.

[0018] Figure 1 and 2 As shown in Figure 3, after the 220V AC power supply enters the power input terminal of power module A1, the stable DC 12V power supply output from pins 3 and 4 of power module A1 enters the power input terminals of power switches S2, S3 and twelve sets of prompting circuits. In the application of this new type, after the waste solvent output from the liquid outlet pipe of the detector of the high performance liquid chromatograph enters the liquid inlet of liquid pump M. After the staff turns on power switch S2, the motor reduction mechanism M1 is powered on and its rotating shaft drives the shaft rod and magnet CT to rotate clockwise, and drives the valve seat inside the volute to rotate. When magnet CT rotates to the lower end of a corresponding reed switch GHN, the moving contact and the static contact inside a corresponding GHN are closed (for example, the sixth reed switch GHN). The 12V power supply will pass through this reed switch GHN and enter the power input terminal of a corresponding light emitting diode VLN after being stepped down and current limited by a corresponding resistor RN. A corresponding light emitting diode VLN (such as the sixth light emitting diode VLN) is powered on and emits light, prompting the tester that the liquid discharge hole 323 of the valve seat just rotates to the lower end of the sixth liquid delivery pipe 311 on the outer side of the volute at this moment. At this time, prompt the staff to turn off power switch S2 in time; then the staff turns on power switches S1 and S3, and liquid pump M and solenoid valve DC (valve core is opened) are powered on and work. In this way, liquid pump M will pump out the waste solvent output from the liquid outlet pipe of the detector, pass through solenoid valve DC, liquid inlet pipe A322 and the inside of the valve seat, liquid discharge hole 323, and a corresponding liquid delivery pipe 311 and output it to the corresponding sixth partition bin 21. After the solvent output is completed, turn off all power switches.

[0019] Figure 1 and 2 、As shown in Figure 3, through the above, the staff of this new type only needs to perform simple power switch operations, and can easily discharge a corresponding waste solvent after detection into the corresponding solvent recovery tank at any position (either at a low position on the ground or at a high position on the test bench) through the liquid pump pressurization. Specifically, every time the motor reduction mechanism drives the valve seat to rotate an angle and the liquid discharge hole of the valve seat communicates with a corresponding liquid delivery pipe, a corresponding light emitting diode will emit light for prompting, ensuring that the corresponding waste solvent can enter a corresponding sub-tank bin (for example, the measurement personnel control the motor reduction mechanism to drive the magnet to rotate to the lower end of the ninth reed switch GHN, and the light emitting diode VLN of the ninth set of display circuits is powered on and emits light, prompting that the liquid discharge hole 323 of the valve seat rotates to the lower end of the ninth liquid delivery pipe 311 on the outer side of the volute). This not only brings convenience to the detection personnel, but also improves the detection efficiency accordingly. Figure 3Among them, the liquid pump M is a self-priming water pump with an AC working voltage of 220V and a power of 180W; the motor reduction mechanism M1 is a coaxial motor gear reducer with a power of 80W, and the rotation speed of the rotating shaft is 5 revolutions per minute (the rotation speed is slow, and the rotating shaft stops rotating immediately after power failure); the resistance value of the resistor RN is 1.8K; the light-emitting diode VLN is a red light-emitting diode; the solenoid valve DC is a 2W normally closed spool solenoid valve; the reed switch GHN is a reed switch with a normally open contact in a glass shell; the power supply module A1 is a finished AC 220V to DC 12V switching power supply module.

[0020] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be construed as limiting the claimed rights.

Claims

1. A chromatographic column solvent recovery device used in conjunction with a high performance liquid chromatography analyzer, comprising a liquid pump, a motor reduction mechanism, a solvent recovery tank, a distribution valve, a bottom plate, and a solenoid valve; characterized in that, It also has a prompting mechanism; the solvent recovery tank has multiple independent sub-tank compartments, and a liquid inlet pipe and a one-way air valve are respectively installed at the upper end of each sub-tank compartment, and a valve is respectively installed in front of the lower end of each sub-tank compartment. The solvent recovery tank is placed on the upper end of the detection table; the distribution valve includes a volute and a hollow valve seat. There is an opening at the rear side end of the volute, and a bearing seat is installed at the outer side end of the opening. A connecting shaft is installed outside the rear end of the valve seat, and the connecting shaft is installed in the inner ring of the bearing of the bearing seat; a liquid inlet pipe A is installed at the front end of the valve seat, and the rear side of the liquid inlet pipe A and the inner lower end of the drain hole outside the valve seat are installed together; a plurality of liquid delivery pipes are installed at equal distances in a circular interval on the outer side of the volute, and the upper ends of the plurality of liquid delivery pipes and the liquid inlet pipes of the plurality of sub-tank compartments are respectively connected by pipelines. The volute is equipped with a sealing plate. There is an opening on the sealing plate, a sleeve is installed outside the opening, a bearing is installed at the inner rear side of the sleeve, and the front side of the liquid inlet pipe A is installed in the inner ring of the bearing. The sealing plate is installed at the front end of the volute. The liquid outlet of the liquid pump is connected to one end of the solenoid valve, and the other end of the solenoid valve is connected to the front side of the sleeve. The liquid inlet of the liquid pump and the liquid outlet pipe of the detector of the high performance liquid chromatography analyzer are connected by a pipeline. The liquid pump, the volute of the distribution valve, the housing of the prompting mechanism, and the motor reduction mechanism are longitudinally installed on the bottom plate in sequence. The bottom plate is installed on the detection table; the display circuit supporting the prompting mechanism is installed in the component box.

2. The chromatographic column solvent recovery device used in conjunction with the high performance liquid chromatography analyzer according to claim 1, wherein, A sealing rubber ring is installed at the outer side end of the valve seat, and the outer side of the sealing rubber ring is in sealed rotational contact with the inner side of the volute.

3. The chromatographic column solvent recovery device used in conjunction with the high performance liquid chromatography analyzer according to claim 1, characterized in that, The prompting mechanism includes a housing, a shaft rod, and a display circuit. Bearings are respectively installed at the front and rear side ends of the housing. The front and rear ends of the shaft rod are respectively installed in the inner rings of the two bearings. The outer sides of the front and rear ends of the shaft rod are respectively installed together with the rear end of the connecting shaft of the valve seat and the front end of the rotating shaft of the motor reduction mechanism. A support rod is installed in the middle of the shaft rod, a magnet is installed at the upper end of the support rod, there are multiple sets of display circuits, and each set of display circuits is equipped with a reed switch. A plurality of reed switches are installed at equal distances in a circular interval on the inner side end of the housing.

4. The chromatographic column solvent recovery device used in conjunction with the high performance liquid chromatography analyzer according to claim 1, characterized in that, The reed switch is a normally open contact reed switch.

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