Automatic pressure type extraction instrument

Abstract

The utility model belongs to the technical field of solid-phase extraction equipment, and discloses an automatic pressure type extraction instrument which comprises a box body, and a power device, a sample loading device, a waste liquid collecting device and a control system are arranged in the box body; the power device comprises two stepping motors, two quantitative screw rods and a pressure pressing plate; the two stepping motors are vertically and fixedly arranged on the inner walls of the left side and the right side of the box body respectively, the quantitative screw rods are connected with the stepping motors through couplings, and the two ends of the pressure pressing plate are fixedly connected with the quantitative screw rod sliding blocks through bolts; the stepping motor is controlled to rotate to drive the quantitative screw rod to rotate, so that the sliding block drives the pressure plate to move up and down, the sample dosage is quantitatively extracted, and the original position can be automatically recovered after extraction is finished; accurate speed control of a numerical control motor is adopted; the problems that pipelines are complex, the number of valves is large, additional gas source equipment is needed, use cost is high, maintenance difficulty is large, set parameters are large, and operation is difficult are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to solid phase extraction equipment technical field, concretely relates to a kind of automatic pressure type extraction instrument. BACKGROUND

[0002] Solid phase extraction is a kind of laboratory sample pretreatment technology, mainly used for the separation and purification of sample, and can improve the recovery rate of analyte compared with traditional liquid extraction method. This technology is based on liquid-solid chromatography theory, and uses selective adsorption and selective elution to enrich, separate and purify the sample. It is a physical extraction process including liquid phase and solid phase. This technology uses the separation principle of selective adsorption and selective elution liquid chromatography. The commonly used method is to pass the sample solution through the adsorbent, retain the measured substance, then use a solvent with appropriate strength to shock impurities, and then use a small amount of solvent to elute the measured substance, so as to achieve rapid separation, purification and concentration. The extractant of solid phase extraction method is solid, and its working principle is based on: the measured components and coexisting interference components in the sample have different interaction forces on the solid phase extractant, so that they are separated from each other.

[0003] In the solid phase extraction process, activator, water sample, elution reagent and eluent reagent are added to the extraction column. In addition to the batch requirement of solid phase extraction, the number of pipes and valves for injecting various reagents is huge, the equipment installation volume is large, the number of pipeline connections is large, which causes the equipment structure to be complex, the number of parameters to be set is large, and the operation is highly professional. The existing technology has not solved the above problems well, which has brought trouble to the normal work in the field, so there is an urgent need for a solid phase extraction device that can reduce the number of pipeline connections, simplify the operation, solidify the operation, and make the installation volume more reasonable. CONTENT OF THE UTILITY MODEL

[0004] The application provides an automatic pressure type extraction instrument, which solves the problems of too many pipeline connections, complex structure, large installation volume, too many parameters and highly professional operation.

[0005] To achieve the above purpose, the application provides the following technical scheme:

[0006] An automatic pressure type extraction instrument includes a box, a power device, a sample loading device, a waste liquid collection device and a control system are arranged in the box.

[0007] The power device includes two stepping motors, two constant displacement screws, and a pressure plate; the two stepping motors are vertically fixed on the left inner wall and the right inner wall of the box body respectively, the upper ends of the two constant displacement screws are connected with the two stepping motors through shaft couplings respectively, the lower ends of the two constant displacement screws are fixed on the left inner wall and the right inner wall of the box body through bearings respectively, and the pressure plate is arranged between the two constant displacement screws; sliding blocks are arranged on the two sides of the pressure plate and are threadedly connected with the constant displacement screws;

[0008] The sample loading device is slidably arranged at the bottom of the box body and includes a syringe rack, a sample rack, and a sampling needle tube; sliding grooves are arranged on the left and right side walls of the syringe rack; the sample rack is transversely inserted into the syringe rack through the sliding grooves; and the sampling needle tube is vertically arranged on the sample rack;

[0009] The waste liquid collecting device is slidably arranged in the syringe rack and is located below the sampling needle tube;

[0010] The control system includes a control panel and a control module; control buttons are arranged on the control panel and are connected with the control module; the control module is installed in the box body and is electrically connected with the stepping motors.

[0011] Further, the sample rack is provided with two rows of six columns of 12 holes for placing 12 sampling needle tubes.

[0012] Further, the sampling needle tube is a 5-50ml needle tube.

[0013] Further, the lower end of the sampling needle tube is provided with a needle type filter head.

[0014] The application has the following beneficial effects:

[0015] 1. Improved extraction efficiency: the pressure type extraction instrument can provide higher extraction efficiency, shorten the extraction time, reduce the solvent consumption, reduce the energy consumption, and improve the production efficiency.

[0016] 2. Reducing manual intervention: the internal parameters of the pressure type extraction instrument are fixed, and professional personnel is not required to set complex parameters, the operation is simple, and one-key starting can automatically execute, the operator only needs to operate starting and stopping, and the whole extraction process does not need other operations and personnel to guard after starting; manual intervention is reduced, and the accuracy and reliability of the experiment are improved.

[0017] 3. Reducing error: since the automatic pressure type extraction instrument can accurately control experimental conditions such as pressure and time, experimental error can be reduced, and the accuracy of experimental results is improved.

[0018] 4. Low maintenance cost: the pressure type extraction instrument has few maintenance parts, only the upper and lower bearings of the screw part need to be lubricated regularly, and the coupling fixing bolts need to be tightened regularly. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the automatic pressure type extraction instrument.

[0020] In the figure: 1-pressure motor, 2-control panel, 3-quantitative screw, 4-sample holder, 5-sampling needle tube, 6-waste liquid collecting device, 7-pressure plate, 8-syringe holder. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the following will describe the utility model through specific embodiments shown in the drawings. Figure 1 However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0022] Embodiment:

[0023] In combination Figure 1 The utility model discloses an automatic pressure type extraction instrument, including the box, the power device, the sample feeding device, the waste liquid collecting device 6, the control system are set up in the box;

[0024] The power device includes two stepper motors 1, two quantitative screw rods 3 and a pressure plate 7;The two stepper motors 1 are vertically fixed on the left inner wall of the box and the right inner wall of the box respectively, the upper ends of the two quantitative screw rods 3 are connected with the two stepper motors 1 through the coupling respectively, the lower ends of the two quantitative screw rods 3 are fixed on the left inner wall of the box and the right inner wall of the box through the bearing respectively, and the pressure plate 7 is arranged between the two quantitative screw rods 3;The both sides of the pressure plate 7 are provided with sliding blocks, and the sliding blocks are screw-connected on the quantitative screw rod 3;

[0025] The sample feeding device is slidably arranged at the bottom of the box and includes a syringe holder 8, a sample holder 4 and a sampling needle tube 5;The left and right side walls of the syringe holder 8 are provided with sliding grooves;The sample holder 4 is transversely inserted into the syringe holder 8 through the sliding grooves;The sampling needle tube 5 is vertically arranged on the sample holder 4;

[0026] The waste liquid collecting device 6 is slidably installed in the syringe holder 8 and located below the sampling needle tube 5;

[0027] The control system comprises a control panel 2 and a control module, the control panel 2 is provided with motion stroke, motion speed, origin coordinate parameters and control buttons, the control buttons are connected with the control module, the control module is installed in the box body, and the control module is in circuit connection with the stepping motor 1; the motion stroke is displayed on the control panel 2.

[0028] Further, the sample rack 4 is provided with two rows of six columns of 12 holes for placing two rows of six columns of 12 sampling needle tubes 5.

[0029] Further, the sampling needle tube 5 is a 5-50ml needle tube.

[0030] Further, the lower end of the sampling needle tube is provided with a needle filter head.

[0031] The working principle of the utility model is as follows: the automatic pressure type extraction instrument is controlled by the control system to rotate the stepping motor 1, the rotation distance and the running speed of the stepping motor 1 are controlled by the control buttons on the control panel 2 according to the motion stroke, the motion speed and the origin coordinate parameters set on the control panel 2, the quantitative screw rod 3 is driven to rotate by the rotation of the stepping motor 1, the sliding block is driven to move up and down by the quantitative screw rod 3, the pressure pressing plate 7 is driven to move up and down by the sliding block, and the syringe is driven to move up and down; the rotation of the stepping motor 1 drives the pressure pressing plate 7 to move up and down at different positions through the quantitative screw rod 3, so that the quantitative extraction sample dose can be controlled, and the original position can be automatically restored after extraction; according to the mechanical pressure principle, the needle filter head is filtered by replacing the special sample rack. The numerical control motor can accurately control the rotation speed of the stepping motor 1. The box body, the syringe rack 8, the sample rack 4 and the waste liquid collecting device 6 are mutually independent and are in sliding connection, so that different special sample racks can be replaced to filter the needle filter head and other operations.

[0032] The above only describes the preferred embodiments of the utility model and is not used for limiting the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An automatic pressure extractor characterized in that, Including box, power device, sample loading device, waste liquid collection device (6), control system are arranged in the box; The power device includes two stepper motors (1), two quantitative screws (3), and a pressure plate (7); the two stepper motors (1) are vertically fixed on the left inner wall and the right inner wall of the box, respectively; the upper ends of the two quantitative screws (3) are connected to the two stepper motors (1) through couplings, respectively; the lower ends of the two quantitative screws (3) are fixed on the left inner wall and the right inner wall of the box through bearings, respectively; the pressure plate (7) is arranged between the two quantitative screws (3); the pressure plate (7) is provided with sliding blocks on both sides, which are threadedly connected to the quantitative screws (3); The sample loading device is slidably arranged at the bottom of the box and includes a syringe rack (8), a sample rack (4), and a sampling needle tube (5); the left and right side walls of the syringe rack (8) are provided with sliding grooves; the sample rack (4) is transversely inserted into the syringe rack (8) through the sliding grooves; the sampling needle tube (5) is vertically arranged on the sample rack (4); The waste liquid collection device (6) is slidably installed in the syringe rack (8) and located below the sampling needle tube (5); The control system includes a control panel (2) and a control module; the control panel (2) is provided with motion stroke, motion speed, origin coordinate parameters, and control buttons; the control buttons are connected to the control module; the control module is installed in the box; and the control module is electrically connected to the stepper motor (1).

2. The pressurized extractor of claim 1, wherein, The sample rack (4) is provided with two rows of six columns of 12 holes for placing 12 sampling needle tubes (5) correspondingly.

3. The pressure extractor according to claim 2, characterized in that The sampling needle tube (5) is a 5-50ml needle tube.

4. The pressurized extractor of claim 3, wherein, The lower end of the sampling needle tube is provided with a needle type filter head.

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