CN221319970U - Purification equipment - Google Patents

Abstract

The utility model discloses purification equipment, and relates to the technical fields of biochemistry and molecular biology. The utility model comprises a plunger sample injector, a liquid shifter, a controller, a control element and a driving mechanism, wherein the driving mechanism is in transmission connection with a plunger of the plunger sample injector, the plunger sample injector is connected with a liquid inlet pipeline and a liquid outlet pipeline, two ends of the liquid outlet pipeline are respectively communicated with the plunger sample injector and the liquid shifter, the control element is respectively used for controlling the communication state of the liquid inlet pipeline and the liquid outlet pipeline with the plunger sample injector, and the controller is electrically connected with the driving mechanism. According to the utility model, the plunger sample injector is arranged to absorb liquid, the liquid absorbed by the plunger sample injector is used for supplying the liquid transfer device, so that the liquid transfer device can continuously perform liquid transfer operations for a plurality of times, and the controller controls the driving mechanism to drive the plunger sample injector, so that the dosage of the liquid absorbed by the plunger sample injector and the dosage of the liquid output by the plunger sample injector are accurately controlled, and the liquid transfer efficiency is improved.

Description

Purification equipment

Technical Field

The utility model belongs to the technical field of biochemistry and molecular biology, and particularly relates to purification equipment.

Background

In the fields of biochemistry and molecular biology, extraction of a specified substance from a sample is an indispensable operation. For example, DNA is extracted from saliva, and it is necessary to wash out other substances in saliva with a plurality of additives, and then to wash out the remaining DNA a plurality of times. Similarly, when the substance is needed to be synthesized, different substances can be added step by step, and finally the substance needed to be synthesized is obtained. When extracting substances or synthesizing substances, a sample is placed in a sample tube, a liquid agent containing the specified substances is sucked through a pipetting needle, the sucked liquid agent is injected into the sample tube, enough reaction time is waited for the sample to react with the added substances, liquid is extracted after the reaction is completed, and the reacted object remains in the sample tube and waits for the next liquid agent addition. The extraction or synthesis of the substance can be completed by the reciprocation.

In the prior art, a certain amount of liquid agent needs to be extracted when a pipetting needle is used, and then the liquid agent is injected into a sample tube. After each filling of the pipetting needle, the sample tube into which the liquid is injected needs to be removed and replaced with a new sample tube, and the pipetting needle also needs to re-draw the liquid and fill the liquid into the new sample tube. For extraction or synthesis of substances, a large number of samples need to be simultaneously handled, and therefore, a pipetting needle needs to fill a batch of sample tubes with liquid. The liquid transferring needle has limited volume, and liquid needs to be extracted again after filling is completed each time, so that the filling operation is complicated, and the problem of low filling efficiency exists.

Disclosure of utility model

The utility model aims to provide purification equipment which is used for solving the problem of low filling efficiency of liquid agent.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

The utility model provides a purification equipment, includes plunger injector, pipettor, control element and actuating mechanism, actuating mechanism with plunger transmission of plunger injector is connected, plunger injector is connected with feed liquor pipeline and drain pipe, feed liquor pipeline both ends respectively with plunger injector and liquid agent source intercommunication, the drain pipe both ends respectively with plunger injector and pipettor intercommunication, control element controls feed liquor pipeline and drain pipe respectively with the intercommunication state of plunger injector, the controller with the actuating mechanism electricity is connected.

In the scheme, a plunger sample injector is arranged for sampling, and then liquid is supplied to a liquid transfer device through the plunger sample injector. The plunger of the plunger sample injector moves, and liquid in the plunger sample injector can be input into the liquid shifter, so that the liquid shifter can continuously perform filling actions for a plurality of times until the liquid in the plunger sample injector is completely discharged. The driving mechanism is used for driving the plunger sampler so that the plunger sampler can absorb liquid or discharge liquid, and the controller is used for controlling the driving mechanism so as to control the movement quantity of the plunger sampler, thereby controlling the amount of liquid absorbed by the plunger sampler each time and the amount of liquid discharged by the plunger sampler each time. The control element is used for controlling the communication state of the plunger sample injector and the liquid agent source or the liquid transfer device, and the plunger sample injector is only communicated with one of the liquid agent source and the liquid transfer device. When the plunger injector needs to extract liquid, the control element is controlled to enable the plunger injector to be communicated with a liquid source, and after the liquid extraction is finished, the control element is controlled to enable the plunger injector to be communicated with the liquid transfer device. The plunger sampler has the advantages that the plunger sampler is larger in size, more liquid can be extracted at one time, the controller controls the driving mechanism to input the liquid in the plunger sampler into the liquid remover step by step, the liquid output at each time can be the same under the control action of the controller, the operation that the liquid is required to be extracted again after each time of liquid removal of the liquid remover is reduced, and the liquid removal efficiency is improved.

Preferably, the plunger injector is provided with a connection port, the connection port is connected with the control element, the control element is provided with a liquid inlet and a liquid outlet, the liquid outlet is communicated with the pipettor, and the liquid inlet is used for being connected with a liquid agent source.

In this scheme, through the communication state of control element switching plunger sample injector with liquid agent source and pipettor to make the plunger sample injector output liquid agent when not having liquid agent return liquid agent source, improve the precision. The liquid inlet can be a plurality of, and the plunger injector can draw liquid agent from a plurality of liquid agent sources for supplying the same liquid agent simultaneously.

Preferably, the control element comprises a valve, which is a three-way reversing valve.

In the scheme, the control element adopts a three-way reversing valve, and three interfaces of the three-way reversing valve are respectively connected with the connecting port, the liquid inlet pipeline and the liquid outlet pipeline. When the three-way reversing valve switches the connection direction, the plunger sample injector can be communicated with a liquid source or a liquid shifter.

Preferably, the control element comprises two valves, and the two valves are respectively arranged in the liquid inlet pipeline and the liquid outlet pipeline.

In this scheme, can control the intercommunication state of feed liquor pipe and drain pipe through two valves alone.

Preferably, the pipettor is provided with at least two pipetting needles, the number of the plunger sample injectors is the same as that of the pipetting needles, and each plunger sample injector is respectively communicated with one pipetting needle.

In this scheme, the pipettor sets up two at least pipetting needles, and two at least pipetting needles can remove liquid to two at least sample tubes simultaneously, improves pipetting efficiency, and every pipetting needle all communicates with a plunger injector, and every plunger injector is a pipetting needle transport liquid agent alone for each pipetting needle transfer liquid dosage can be controlled alone for each pipetting needle transfer liquid agent precision is ensured.

In order to further improve the dosage precision of the liquid agent conveyed by the plunger sample injector to the pipettor, the connecting ports of the plunger sample injectors are respectively provided with a valve.

In this scheme, each plunger injector sets up the valve respectively, and when valve and pipettor intercommunication, each plunger injector is not linked together each other for can not influence each other when each plunger injector exports the liquid agent, improves the dose precision when the liquid agent exports.

In order to further solve the problem that the output liquid doses of the plunger sample injectors are different, the plunger sample injector further comprises a connecting block, and plungers of the plunger sample injectors are respectively connected with the connecting block.

In this scheme, the plunger of each plunger injector passes through the connecting block and connects as a whole, and when a plunger moved, other plungers can move in step under the connecting action of connecting block for each plunger can move in step when exporting the liquid agent and when absorbing the liquid agent, thereby makes each plunger absorb the volume of liquid agent the same with the volume of exporting the liquid agent.

In order to further solve the problem of inconvenient valve control, the valve is an electromagnetic valve, and the electromagnetic valve is electrically connected with the controller.

In the scheme, the valve adopts the electromagnetic valve and is controlled by the controller, so that the control efficiency can be improved. And, because plunger injector's liquid agent volume that can once only absorb many times transfer satisfies the pipettor and pours into liquid agent into the sample cell many times, therefore the switching-over frequency of solenoid valve is low, compares the pipettor and pours into liquid agent back solenoid valve all need the switching-over twice at every turn, and this scheme can prolong the life of solenoid valve.

In order to solve the problem that the driving mechanism is inconvenient to connect with the plunger and inconvenient to install, the driving mechanism is connected with the plunger through a transmission mechanism.

In the scheme, the driving mechanism can be flexibly arranged by the transmission mechanism, so that the use space is reduced.

In order to further solve the problem that the driving mechanism causes inaccurate movement of the plunger and thus inaccurate sucking and outputting of the liquid agent, the driving mechanism is a screw nut, the screw is connected with the driving mechanism, and the nut is connected with the plunger; or the transmission mechanism is a gear rack, the gear is connected with the driving machine, and the rack is connected with the plunger.

In the scheme, the transmission mode of the screw nut and the gear rack has high transmission precision, so that the moving precision of the plunger is improved, the precision of the plunger sample injector for sucking liquid dosage each time is improved, and the precision of the plunger sample injector for outputting liquid dosage each time can be ensured.

In order to further solve the problem of inaccurate liquid sucking and dosage output caused by low precision of the driving mechanism, the driving mechanism is a servo motor or a stepping motor.

In the scheme, the servo motor or the stepping motor is adopted to drive the transmission mechanism, so that the precision of the driving mechanism can be ensured, the accurate and stable plunger movement amount of the plunger sampler is ensured, and the accurate and reliable absorption and output dosage of liquid agent are ensured.

Preferably, the device further comprises a linear mechanism, wherein the linear mechanism is connected with the pipettor and used for moving the pipettor.

In this scheme, remove the pipettor through linear mechanism, make the pipettor can follow sharp direction and remove, can follow sharp range with the sample pipe for the pipettor can be more high-efficient to the injection liquid agent in the sample pipe of a large batch.

For further solving the problem that there is impurity in the external environment to mix in the pipetting process, for this reason, still include the cabinet body, plunger injector, pipettor, drive mechanism and actuating mechanism all set up in the cabinet body, the cabinet body is provided with the cabinet door, the cabinet door is used for closing the cabinet body.

In this scheme, set up the isolated external environment of cabinet body and cabinet door to prevent that impurity in the external environment from getting into the cabinet body, thereby avoid the liquid of pipettor output to mix impurity.

Preferably, the cabinet body is provided with an exhaust passage.

In the scheme, the cabinet body is provided with the exhaust channel, so that harmful gas generated in the cabinet body can be exhausted. The exhaust passage may be connected to a pipe to introduce the harmful gas into a container for collecting the harmful gas, or to input the harmful gas into a device for treating the harmful gas for harmless treatment.

The utility model has the following beneficial effects:

According to the utility model, the plunger sample injector is arranged to absorb liquid, the liquid absorbed by the plunger sample injector is used for supplying the liquid transfer device, so that the liquid transfer device can continuously perform liquid transfer operations for a plurality of times, and the controller controls the driving mechanism to drive the plunger sample injector, so that the dosage of the liquid absorbed by the plunger sample injector and the dosage of the liquid output by the plunger sample injector are accurately controlled, and the liquid transfer efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a pipette;

FIG. 3 is a front view of the plunger injector mounted to a mounting plate;

FIG. 4 is a rear view of the drive mechanism mounted to the mounting plate;

FIG. 5 is a cross-sectional view taken at A-A of FIG. 4;

FIG. 6 is a schematic view of the structure of the cabinet of the present utility model;

Fig. 7 is a schematic structural view of the cabinet body and the cabinet door according to the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1. A pipette; 2. a sample tube; 3. a guide rail; 4. a liquid outlet; 5. a valve; 6. a plunger injector; 7. a mounting plate; 8. a connecting block; 9. a bar-shaped hole; 10. a slide block; 11. a pipetting needle; 12. a liquid inlet; 13. a servo motor; 14. a transmission block; 15. a guide rod; 16. a screw rod; 17. a pin; 18. a cabinet body; 19. a cabinet door; 20. an exhaust passage.

Detailed Description

The technical scheme of the utility model is clearly and completely described by a specific implementation mode of the embodiment of the utility model with the aid of the attached drawings.

Example 1

Referring to fig. 1, a purification apparatus is provided in the first embodiment, and includes a plunger injector 6, a pipette 1, a transmission mechanism, a controller, a driving mechanism and a mounting plate 7, wherein the plunger injector 6 and the driving mechanism are respectively mounted on the mounting plate 7, and the plunger injector 6 is provided with a connection port. When the plunger sampler 6 sucks the liquid, the connection port is communicated with the liquid source, the sucked liquid enters from the connection port, and when the plunger sampler 6 conveys the liquid to the pipetter 1, the connection port is communicated with the pipetter 1, so that the liquid in the plunger sampler 6 is conveyed into the pipetter 1. The connection port of the plunger sampler 6 is provided with a valve 5, and the valve 5 enables the plunger sampler 6 to be communicated with the pipettor 1 or the liquid agent source only. The plunger of the plunger injector 6 is connected with the driving mechanism through a transmission mechanism, so that the driving mechanism takes the plunger to move, and the plunger injector 6 is driven to suck or output liquid agent. The controller is used for controlling the driving mechanism, so as to control the plunger movement amount of the plunger sampler 6, and control the plunger sampler 6 to control the sucking amount of the liquid agent or the discharging amount of the liquid agent.

The valve 5 can adopt a two-position three-way valve, the plunger injector 6 and the valve 5 are always in a communication state, the valve core position of the valve 5 is switched, and the communication state of the valve 5, a liquid agent source and the pipettor 1 can be replaced. The valve 5 is provided with a liquid inlet 12 and a liquid outlet 4, the liquid inlet 12 is communicated with the liquid agent source through a pipeline, and the liquid outlet 4 is connected with the liquid transfer device 1 through a pipeline.

The valve 5 serves as a control element for controlling the communication state of the plunger sampler 6, and communicates the plunger sampler 6 with the liquid agent source or communicates the plunger sampler with the pipette 1 by switching the direction.

The valve 5 can adopt an electromagnetic valve, and the electromagnetic valve is electrically connected with the controller, so that the reversing of the electromagnetic valve can be controlled by the controller, and the control efficiency is improved. The electromagnetic valve is connected with a connecting port of the plunger injector 6, the plunger injector 6 completes a period of sucking and discharging, and the electromagnetic valve performs reversing twice. The plunger injector 6 completes a period of sucking and discharging, the liquid agent can be added into a large number of sample tubes 2 by the liquid transfer device 1, the reversing frequency of the electromagnetic valve is low, and the service life of the electromagnetic valve is longer.

As shown in fig. 2, the pipette 1 is provided with at least two pipetting needles 11, so that the pipette 1 can simultaneously pipette a plurality of sample tubes 2. The number of pipetting needles 11 may be two, three, four or more, and the sample tubes 2 in the market are usually fixed by using an orifice plate of 8 x 12, so the number of pipetting needles 11 is preferably set to 8, so that the pipetter 1 can inject liquid into the side-by-side 8 sample tubes 2 at one time. Similarly, the number of the pipetting needles 11 may be an integer multiple of 8, and the pipetting needles 11 may be arranged in such a manner that 8 are arranged in each row, so that the pipettes 1 can simultaneously inject the liquid agent into the sample tubes 2 in the integer row. A pipetting needle 11 communicates with a liquid outlet 4.

Each pipetting needle 11 corresponds to one plunger injector 6, and the pipetting needles 11 correspond to the plunger injectors 6 one by one. The plunger sample injectors 6 are fixed on the mounting plate 7 side by side, and the mode of side by side fixation is convenient for uniformly driving the plungers of the plunger sample injectors 6. The plungers of the plunger injectors 6 are connected through a connecting block 8, the connecting block 8 and the plungers can be connected through glue adhesion or stud connection, and under the condition that the connecting block 8 is connected with the plungers, the plungers synchronously move. That is, when the driving mechanism drives one plunger to move, the other plungers move synchronously under the connection action of the connection block 8. The drive mechanism is connected with a plunger through a transmission mechanism, or the drive mechanism is connected with the connecting block 8 through the transmission mechanism.

As shown in fig. 3 and 4, the connection ports of the plunger injectors 6 are respectively provided with a valve 5, so that when the plunger injectors 6 output liquid formulation to the pipetter 1, the plunger injectors 6 are kept in a state of being not communicated with each other, and the delivery precision of the liquid formulation dosage is ensured. Each plunger injector 6 is in communication with a pipetting needle 11 of each pipetter 1 via a conduit.

The liquid source may be a liquid bottle or a conduit for supplying liquid.

The drive mechanism may employ a servo motor 13 or a stepper motor. The controller can precisely control the rotation amounts of the servo motor 13 and the stepping motor, thereby precisely controlling the dosage of the liquid agent sucked or outputted by the plunger sampler 6.

The driving mechanism and the plunger sample injector 6 are respectively arranged on two sides of the mounting plate 7, so that the total volume of the driving mechanism and the plunger sample injector 6 is reduced, and the driving mechanism and the plunger sample injector 6 are convenient to mount. Meanwhile, the mounting mode can enable the plunger sampler 6 to be longer in size, so that the liquid amount sucked by the plunger sampler 6 can be more, and more liquid agent can be provided for the liquid transfer device 1 at one time.

As shown in fig. 5, when the driving mechanism and the plunger injector 6 are respectively disposed on two sides of the mounting plate 7, a guide rod 15 is further disposed on the mounting plate 7, a transmission block 14 is disposed on the guide rod 15, a bar hole 9 is disposed on the mounting plate 7, the length direction of the bar hole 9 is parallel to the moving direction of the plunger, the transmission block 14 is connected with the connecting block 8 through a pin 17, and the pin 17 penetrates through the bar hole and can move along the length direction of the bar hole.

The transmission mechanism may adopt a screw 16 nut, the driving mechanism is connected with the screw 16, the nut is connected with the connecting block 8 or the plunger, and the nut is in transmission connection with the screw 16. The driving mechanism drives the screw rod 16 to rotate, so that the plunger can be moved, and the plunger injector 6 can suck or output liquid agent.

Similarly, the transmission mechanism can also adopt a gear and a rack, the gear is connected with the output shaft of the driving mechanism, the rack is connected with the plunger or the connecting block 8, and the rack is meshed with the gear. When the driving mechanism drives the gear to rotate, the rack moves linearly under the action of the gear to drive the plunger or the connecting block 8 to move, so that the plunger injector 6 can absorb or output liquid.

The controller can adopt a PLC or a singlechip.

Example two

The second embodiment provides a purifying apparatus, which is different from the first embodiment in that the second embodiment further includes a linear mechanism for moving the pipette 1.

The linear mechanism is connected with the liquid dispenser 1, so that the liquid dispenser 1 can move along the direction of the linear mechanism.

When the device works, the linear mechanism drives the liquid transfer device 1 to move, the sample tubes 2 can be arranged and placed along a straight line, the linear mechanism drives the liquid transfer device 1 to move to the upper part of the sample tubes 2, the controller controls the plunger injector 6 to output a certain amount of liquid agent, and the liquid agent is injected into the sample tubes 2 from the liquid transfer needle 11 after entering the liquid transfer device 1, so that the liquid transfer of one or a row of sample tubes 2 is completed. After one pipetting, the linear mechanism drives the pipettor 1 to move to the position above the next or next row of sample tubes 2, so that the linear mechanism reciprocates, and the continuous injection of liquid agents into a large number of sample tubes 2 can be realized, and the efficiency is improved. In the second embodiment, the linear mechanism is adopted to drive the pipette 1, so that the efficiency is higher than that of manually operating the pipette 1, and errors cannot occur.

The linear mechanism can be a screw 16 nut or a servo electric cylinder.

When the linear mechanism is a screw 16 nut, a servo motor 13 needs to be arranged, and the screw 16 is driven by the servo motor 13. The nut is connected with the pipettor 1, and the screw 16 is matched with the nut to enable the pipettor 1 to move along a straight line. The servo motor 13 is electrically connected with the controller, and the controller controls the rotation of the servo motor 13, thereby controlling the movement amount of the pipette 1.

When the linear mechanism is a servo electric cylinder, the servo electric cylinder is electrically connected with the controller, and the controller controls the elongation of the servo electric cylinder. The servo electric cylinder is connected with the liquid dispenser 1, and the servo electric cylinder pushes the liquid dispenser 1 to move.

The movement of the pipette 1 is further provided with a slide 10 of the guide rail 3, the slide 10 is slidably connected with the guide rail 3, the guide rail 3 is fixed on a workbench, and the slide 10 is connected with the pipette 1. The guide rail 3 is used for restraining the moving direction of the pipettor 1 and ensuring that the moving direction of the pipettor 1 is accurately controllable.

Example III

The third embodiment provides a purifying apparatus, which is different from the first embodiment in that the driving mechanism in this embodiment is a servo cylinder.

The servo cylinder is connected with the connecting block 8 or the plunger. The servo electric cylinder is electrically connected with the controller, and the controller controls the elongation of the servo electric cylinder.

Compared with the first embodiment, the third embodiment has no transmission mechanism and has a simpler structure.

The third embodiment is also applicable to the scheme of the second embodiment.

Example IV

As shown in fig. 6 and 7, a purifying apparatus is provided in the fourth embodiment, which further includes a cabinet 18 and a door 19, unlike the first embodiment.

The plunger sampler 6, the pipettor 1, the transmission mechanism, the controller, the driving mechanism and the mounting plate 7 are all arranged in the cabinet 18, the sample tube 2 corresponds to the position of the pipettor 1, and the sample tube 2 is also arranged in the cabinet 18.

When the cabinet door 19 is closed, the cabinet door 19 is matched with the cabinet body 18 to isolate the external environment, so that impurities in the external environment are prevented from entering the cabinet body 18, and impurities in the external environment are prevented from entering the sample tube 2 or entering the pipetting device 1 and other devices.

The cabinet door 19 can adopt a vertical hinged door, a sliding door, a rolling door, an upturned door and other structures.

An exhaust passage 20 is arranged at the top of the cabinet body 18, and the exhaust passage 20 is communicated with the interior of the cabinet body 18. The exhaust passage 20 may be used to exhaust the harmful gases generated inside the cabinet 18 when the cabinet is synthesizing or purifying substances. An exhaust fan may be disposed at an opening of the exhaust passage 20, and the air in the cabinet 18 is exhausted through the exhaust fan. The exhaust passage 20 is provided with a joint for connecting a pipe through which the harmful gas can be exhausted to a container for collecting the harmful gas or an apparatus for treating the harmful gas. The container for collecting the harmful gas may be a gas cylinder.

The fourth embodiment is also applicable to the second and third embodiments.

Example five

The fifth embodiment provides a purifying apparatus, which is different from the first embodiment in that the plunger sampler 6 is communicated with the liquid source through a liquid inlet pipe, a valve 5 is disposed on the liquid inlet pipe, the plunger sampler 6 is communicated with the liquid shifter 1 through a liquid outlet pipe, and a valve 5 is also disposed on the liquid outlet pipe.

The valves 5 on the liquid inlet pipeline and the liquid outlet pipeline are stop valves.

The valves 5 are all electrically connected with a controller. The two valves 5 are in operation in an open and closed state. That is, only one of the valves 5 is open at the same time, allowing the plunger sampler 6 to communicate with only the liquid source, or allowing the plunger sampler to communicate with only the pipette 1.

The fifth embodiment is also applicable to the second, third and fourth embodiments.

Claims (10)

1. A purification apparatus, characterized in that: including plunger injector (6), pipettor (1), controller, control element and actuating mechanism, actuating mechanism with the plunger transmission of plunger injector (6) is connected, plunger injector (6) are connected with feed liquor pipeline and play liquid pipeline, feed liquor pipeline both ends respectively with plunger injector (6) and liquid source intercommunication, play liquid pipeline both ends respectively with plunger injector (6) and pipettor (1) intercommunication, control element controls feed liquor pipeline and play liquid pipeline respectively with the intercommunication state of plunger injector (6), the controller with the actuating mechanism electricity is connected.

2. A purification apparatus according to claim 1, wherein: the plunger sampler (6) is provided with a connecting port, the connecting port is connected with the control element, the control element is provided with a liquid inlet (12) and a liquid outlet (4), the liquid outlet (4) is communicated with the liquid transfer device (1), and the liquid inlet (12) is used for being connected with a liquid agent source.

3. A purification apparatus according to claim 2, wherein: the control element comprises a valve (5), and the valve (5) is a three-way reversing valve.

4. A purification apparatus according to claim 1, wherein: the control element comprises two valves (5), and the two valves (5) are respectively arranged in the liquid inlet pipeline and the liquid outlet pipeline.

5. A purification apparatus according to claim 1, wherein: the pipetting device (1) is provided with at least two pipetting needles (11), the number of the plunger sample injectors (6) is the same as that of the pipetting needles (11), and each plunger sample injector (6) is respectively communicated with one pipetting needle (11).

6. A purification apparatus according to claim 5, wherein: the connecting ports of the plunger sample injectors (6) are respectively provided with a valve (5).

7. A purification apparatus according to claim 1, wherein: the control element is electrically connected with the controller.

8. A purification apparatus according to claim 1, wherein: the driving mechanism and the plunger are connected through a transmission mechanism, the transmission mechanism is a screw (16) nut, the screw (16) is connected with the driving mechanism, and the nut is connected with the plunger; or the transmission mechanism is a gear rack, the gear is connected with the driving machine, and the rack is connected with the plunger.

9. A purification apparatus according to claim 1, wherein: still include cabinet body (18), plunger injector (6), pipettor (1), drive mechanism and actuating mechanism all set up in cabinet body (18), cabinet body (18) are provided with cabinet door (19), cabinet door (19) are used for closing cabinet body (18).

10. A purification apparatus according to claim 9, wherein: the cabinet body (18) is provided with an exhaust passage (20).