Reagent adding device

Abstract

The utility model relates to the technical field of experimental equipment, and provides a reagent adding device which comprises a peristaltic assembly, an air pump, a first switch valve and a controller, the peristaltic assembly comprises a peristaltic pump, and an inlet of the peristaltic pump is communicated with a reagent bottle through an input pipe; an outlet of the peristaltic pump is communicated with the sample cup through an output pipe; an inlet of the air pump is communicated with air, and an outlet of the air pump is communicated with an inlet of the peristaltic pump through an exhaust pipeline; the first switch valve is arranged on the exhaust pipeline; the peristaltic pump, the air pump and the first switch valve are electrically connected with the controller, the controller controls the peristaltic pump to operate based on a target value, and after the target value is reached, the controller controls the peristaltic pump to stop, the air pump to start and controls the first switch valve to open. By controlling the operation of the peristaltic pump, the air pump and the first switch valve, the reagent adding amount can be accurately controlled, the reagent is prevented from being retained in the peristaltic pump and the output pipe, and the reliability and the accuracy of the reagent adding process are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to experimental equipment technical field especially relates to a reagent adding device. BACKGROUND

[0002] In the field of precision chemical analysis and biological experiment, the reliability and repeatability of experimental results are important basis for scientific research and technological development. The precision of reagent adding, as a key factor in the experimental process, directly determines the accuracy of experimental results. Therefore, how to ensure the precision of reagent adding has been an important topic of laboratory technology research and equipment development.

[0003] The peristaltic pump is simple in structure, easy to operate, low in maintenance cost and has the ability of continuous liquid supply, and is widely used in laboratories as a commonly used liquid transmission equipment. However, when the peristaltic pump transmits small volume liquid, the flow control is unstable and the precision is low, which affects the experimental results. UTILITARY MODEL CONTENT

[0004] The utility model provides a reagent adding device to solve the problem of low precision of reagent adding device in prior art, which affects the experimental results.

[0005] The utility model provides a reagent adding device, include: peristaltic assembly, including peristaltic pump, the import of peristaltic pump is communicated with reagent bottle through input pipe, the export of peristaltic pump is communicated with sample cup through output pipe, air pump and first switch valve, the import of air pump is used to communicate with air, the export of air pump is communicated with the import of peristaltic pump through exhaust pipe line, first switch valve is located in exhaust pipe line, controller, peristaltic pump, air pump and first switch valve are electrically connected with controller respectively, the controller controls peristaltic pump operation based on target value, after reaching target value, the controller controls peristaltic pump shutdown, air pump starts, and controls first switch valve opening.

[0006] According to the reagent adding device provided by the utility model, the peristaltic assembly further includes second switch valve and third switch valve, the second switch valve is arranged in the input pipe, and the third switch valve is arranged in the output pipe, and the second switch valve and the third switch valve are connected with the controller respectively.

[0007] According to the reagent adding device provided by the utility model, the peristaltic assembly is multiple, the import of each peristaltic pump is communicated with the export of air pump through the exhaust pipe line, and each exhaust pipe line is provided with the first switch valve.

[0008] The reagent adding device further comprises an optical sensor, the optical sensor is arranged in the output pipe, the optical sensor is electrically connected with the controller, and the controller controls operation of the air pump based on data of the optical sensor.

[0009] The reagent adding device further comprises a flow sensor, the flow sensor is arranged in the input pipe and / or the output pipe, and the flow sensor is electrically connected with the controller.

[0010] The reagent adding device further comprises a weight sensor, the sample cup is arranged on the weight sensor, the weight sensor is electrically connected with the controller, and the controller controls operation of the peristaltic pump based on data obtained by the weight sensor and the flow sensor.

[0011] The reagent adding device further comprises a pipette, the pipette is used for inputting the same kind of reagent into the sample cup after the peristaltic pump inputs the reagent, so that the total amount of the reagents input into the sample cup by the peristaltic pump and the pipette reaches a target value.

[0012] The reagent adding device further comprises a visual sensor, the visual sensor and the pipette are electrically connected with the controller respectively, and the controller controls the pipette to input the same kind of reagent into the sample cup based on current data obtained by the visual sensor.

[0013] The reagent adding device further comprises an experiment table and a placing rack, the placing rack is arranged on the experiment table, a limiting groove is arranged on the placing rack, the output pipe is embedded in the limiting groove, and the outlet of the output pipe is arranged towards the sample cup; and the pipette is arranged on the placing rack.

[0014] The reagent adding device further comprises a robot, the robot is electrically connected with the controller, the controller is used for controlling the robot to grasp the sample cup and move the sample cup to a target position, and / or is used for controlling the robot to grasp the pipette and move the pipette to a target position.

[0015] The reagent adding device can accurately control the adding amount of the reagent by controlling operation of the peristaltic pump, the air pump and the first on-off valve, avoids that the reagent is retained in the peristaltic pump and the output pipe, and improves reliability and accuracy of the reagent adding process. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described in the following are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0017] Figure 1 is one of the structural schematic diagrams of the reagent adding device provided by the present application;

[0018] Figure 2 is the second structural schematic diagram of the reagent adding device provided by the present application;

[0019] Reference signs:

[0020] 1, peristaltic assembly; 11, peristaltic pump; 2, input pipe; 3, output pipe; 4, pipette; 5, reagent bottle; 6, sample cup; 7, experiment table; 8, placing rack; 9, robot. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely in the following combined with the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0022] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0023] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0024] Furthermore, the terms "first", "second", etc. are used herein only to describe different instances, and do not imply or suggest relative importance or a number of the technical features indicated. Thus, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically limited.

[0025] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0026] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and in itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the applicability of other processes and / or the use of other materials.

[0027] The following will be described in conjunction with Figures 1-2 The reagent adding device of the present application is described.

[0028] The reagent adding device provided by the embodiments of the present application comprises a peristaltic assembly 1, an air pump, a first on-off valve and a controller.

[0029] The peristaltic assembly 1 comprises a peristaltic pump 11, the inlet of the peristaltic pump 11 is communicated with a reagent bottle 5 through an input pipe 2, the reagent bottle 5 stores sufficient reagent, the outlet of the peristaltic pump 11 is communicated with a sample cup 6 through an output pipe 3, forming a complete conveying path. In the process of use, the peristaltic pump 11 is started, the rollers or blocks in the pump head begin to rotate, and the input pipe 2 is subjected to pressure. When the rollers or blocks rotate and extrude the input pipe 2, a closed extrusion area is formed in the input pipe 2, the pressure generated by the extrusion area causes the reagent in the reagent bottle 5 to be sucked into the input pipe 2, and as the peristaltic pump 11 continues to run, the reagent is pushed along the input pipe 2 to move to the outlet of the peristaltic pump 11, and enters the sample cup 6 through the output pipe 3.

[0030] The inlet of the air pump is exposed to the air for inhaling the air, and the outlet of the air pump is communicated with the inlet of the peristaltic pump 11 through the exhaust pipeline to form an air conveying channel. In the case that the peristaltic pump 11 adds the reagent to the target value, the air pump can input the air into the peristaltic pump 11 and the output pipe 3 through the exhaust pipeline, and the air can drive the reagent in the output pipe 3 to flow towards the sample cup 6, so as to prevent the reagent from being retained in the output pipe 3 and improve the precision and efficiency of reagent addition. The first switch valve is arranged in the exhaust pipeline and is used for controlling the communication and disconnection of the outlet of the air pump and the inlet of the peristaltic pump 11. In a preferred embodiment, the first switch valve is arranged at the outlet end of the exhaust pipeline, and when the first switch valve is closed, it can effectively prevent the reagent in the input pipe 2 from entering the exhaust pipeline due to pressure or misoperation, so as to keep the exhaust pipeline clean and efficient.

[0031] Further, the peristaltic pump 11, the air pump and the first switch valve are electrically connected with the controller respectively. The controller can control the operating parameters of the peristaltic pump 11 based on the target value to ensure the accurate addition of the reagent. When the target value is reached, the controller controls the peristaltic pump 11 to stop. At the same time, the air pump is controlled to start, and the first switch valve is controlled to open, and the air output by the air pump moves along the exhaust pipeline, the inlet of the peristaltic pump 11, the outlet of the peristaltic pump 11 and the output pipe 3 to drive the reagent in the peristaltic pump 11 and the output pipe 3 to flow towards the sample cup 6, so as to prevent the reagent from being retained in the interior, and further improve the addition precision of the reagent adding device. It should be noted that in the use process, the air pump is started first, and then the first switch valve is opened to prevent the reagent in the input pipe 2 from entering the exhaust pipeline.

[0032] The reagent adding device provided by the embodiment of the utility model can accurately control the addition amount of the reagent by controlling the operation of the peristaltic pump 11, the air pump and the first switch valve through the controller, avoids the reagent from being retained in the peristaltic pump 11 and the output pipe 3, improves the reliability and accuracy of the reagent addition process, and has high application value.

[0033] The peristaltic assembly 1 further comprises a second switch valve and a third switch valve. The second switch valve is arranged at the input pipe 2. The second switch valve is connected with the controller. When the peristaltic pump 11 is started, the controller opens the second switch valve, so that the reagent in the reagent bottle 5 is transported into the peristaltic pump 11. When the output of the peristaltic pump 11 reaches the target value (volume or capacity), the controller controls the peristaltic pump 11 to stop, and controls the second switch valve to be closed at the same time, so that the connection between the reagent in the reagent bottle 5 and the peristaltic pump 11 is cut off, and the reagent in the reagent bottle 5 is prevented from entering the peristaltic pump 11. In this process, the controller controls the air pump to be started, and controls the first switch valve to be opened, so that air is input into the air pump, and the reagent in the peristaltic pump 11 and the output pipe 3 is driven to flow towards the sample cup 6, so that the reagent is prevented from being retained inside, the reagent is completely transported, and the adding efficiency and accuracy of the reagent are improved. In an embodiment, the second switch valve is arranged between the outlet of the input pipe 2 and the inlet of the peristaltic pump.

[0034] The third switch valve is arranged at the output pipe 3. The third switch valve is electrically connected with the controller. After the air pump is operated for a preset time, the third switch valve is controlled to be closed, so that air is prevented from entering the sample cup 6 to cause air flow change, and the third switch valve cooperates with the closing of the first switch valve and the second switch valve to form multiple protections. In an embodiment, the third switch valve is arranged at the output end of the output pipe 3.

[0035] In order to further improve the adding efficiency, a plurality of peristaltic assemblies 1 are arranged in the embodiment of the utility model, and the plurality of peristaltic assemblies 1 share one air pump. Figure 1 and Figure 2 As shown in FIGS. 1, 2 and 3, the peristaltic assemblies 1 are two, and can also be three, five, six, eight or the like. Specifically, the inlets of the peristaltic pumps 11 are communicated with the outlet of the air pump through the exhaust pipes. In the actual installation process, the inlets of the plurality of exhaust pipes can be communicated with the outlet of the air pump through the multi-way valve, and the outlet of each exhaust pipe is communicated with the inlet of one peristaltic pump 11. Further, each exhaust pipe is provided with the first switch valve, each first switch valve is electrically connected with the controller, and the controller can control the plurality of first switch valves to be opened and closed individually or simultaneously. In another embodiment, the inlets of the exhaust pipes are communicated with the outlet of the air pump, the outlet end of the exhaust pipe is provided with the multi-way valve, and each outlet end of the multi-way valve is communicated with the inlet of one peristaltic pump 11. Further, each outlet end of the multi-way valve is provided with the first switch valve, each first switch valve is electrically connected with the controller, and the controller can control the plurality of first switch valves, so that the working state of each peristaltic pump 11 can be adjusted more flexibly.

[0036] The reagent adding device provided by the embodiment of the utility model still includes optical sensor, optical sensor is equipped in output pipe 3. Optical sensor is electrically connected with controller, and the controller controls the operation of air pump based on the data of optical sensor. Specifically, optical sensor detects the state of reagent in output pipe 3 in real time through emitting and receiving optical signal, such as light intensity change, reflectivity change and the like, and transmits real-time data to controller. After receiving the signal from optical sensor, the controller analyzes and controls the operation of air pump. For example, when optical sensor detects that there is reagent flow or stagnation in output pipe 3, the controller controls the operating parameters of air pump to ensure the smooth delivery of reagent and achieve efficient and accurate reagent adding effect. When optical sensor detects that there is no reagent flow or stagnation in output pipe 3, the controller controls air pump to be closed.

[0037] The embodiment of the utility model matches the work of optical sensor, air pump and controller, can clean output pipe 3 before delivery, can improve the delivery efficiency of reagent and improve the reagent adding precision during the delivery process.

[0038] The reagent adding device further includes a flow sensor, which is arranged in the input pipe 2 and / or the output pipe 3 and is used to detect the current flow in the input pipe 2 and / or the output pipe 3. The flow sensor is electrically connected with the controller, and the flow of the reagent in the input pipe 2 and / or the output pipe 3 is monitored in real time. If the current flow is lower or higher than the set flow, the controller can adjust the current flow by adjusting the operating parameters (such as the rotating speed) of the peristaltic pump 11, so as to ensure that the amount of the added reagent meets the set requirements.

[0039] Further, the reagent adding device further includes an alarm, which is electrically connected with the controller. If the current flow is lower or higher than the set flow, the controller controls the alarm to send alarm information, so as to remind the staff to handle in time and avoid the risk of excessive or insufficient addition of the reagent.

[0040] The reagent adding device further includes a weight sensor, and the sample cup 6 is arranged on the weight sensor, so that the current weight of the reagent in the sample cup 6 can be obtained. The weight sensor is connected with the controller, and the controller controls the operation of the peristaltic pump 11 based on the current data obtained by the weight sensor and the flow sensor. Before the reagent is added, the current data of the flow sensor, the operating parameters of the peristaltic pump 11 and the target output amount can be compared, so as to realize calibration. The current data obtained by the weight sensor and the target output amount of the peristaltic pump 11 can also be compared, so as to realize calibration and ensure the consistency of the data. It should be noted that, in the case that the operating parameters of the peristaltic pump 11 are certain, the weight data obtained by the weight sensor, the flow data of the flow sensor and the output amount of the peristaltic pump 11 have a one-to-one correspondence, which will not be explained here.

[0041] In order to improve the adding precision of the reagent adding device, the reagent adding device further comprises a pipette 4, the tip of the pipette 4 is immersed in the reagent bottle 5, then the piston is slowly pulled to the first stop point (usually a scale mark), at this time, negative pressure is formed in the tip, and the liquid is sucked into the tip. The tip is moved above the sample cup 6, and then the piston is pushed to the second stop point (usually the lowest point), at this time, the liquid in the tip is pushed out. After a certain amount of reagent is input into the sample cup 6 by the peristaltic pump 11 through the input pipe 2 and the output pipe 3, the same kind of reagent can be added into the sample cup 6 by the pipette 4, so that the reagent added into the sample cup 6 by the peristaltic pump 11 and the pipette 4 reaches the target value. Further, the pipette 4 is electrically connected with the controller, and the controller can control the pipette 4 to add reagent into the sample cup 6 according to the output amount of the peristaltic pump 11 and the current amount in the sample cup 6, until the target value is reached. It should be noted that the current amount in the sample cup 6 can be obtained by the weight sensor, or can be obtained by the running parameters of the peristaltic pump 11, or can be calculated by the flow data obtained by the flow sensor and other related parameters.

[0042] Further, the sample cup 6 is provided with a scale value, and the staff can also control the pipette 4 to add a certain amount of reagent into the sample cup 6 until the target value is reached by directly observing the solution volume in the sample cup 6.

[0043] In one embodiment, the reagent adding device further comprises a visual sensor, as shown in Figure 1 and Figure 2 The sample cup 6 is provided with a scale value, and the visual sensor is used to obtain the volume in the sample cup 6, and the pipette 4 adds reagent into the sample cup 6 according to the volume obtained by the visual sensor, until the target value is reached. The visual sensor is connected with the controller, and the controller controls the pipette 4 to input a certain amount of the same kind of reagent (the same as the reagent input by the peristaltic pump 11) into the sample cup 6 based on the current data obtained by the visual sensor, until the total amount of the reagent input into the sample cup 6 by the peristaltic pump 11 and the pipette 4 reaches the target value.

[0044] Specifically, the visual sensor is arranged near the sample cup 6 through a fixing member, and the visual sensor can move along the extension direction of the fixing member to adjust the height of the visual sensor, so that the visual sensor is flush with the lowest surface of the solution in the sample cup 6, and the accuracy of the visual sensor is improved. In one embodiment, the fixing member is a telescopic member, and the height of the visual sensor is adjusted by telescoping. In another embodiment, the fixing member is provided with a sliding rail extending along the extension direction of the fixing member, and the visual sensor can move along the extension direction of the sliding rail to adjust the height of the visual sensor. In still another embodiment, the fixing member is a screw rod, one end of the fixing member is threadedly connected with a mounting table (laboratory table 7), and the height of the visual sensor is adjusted by adjusting the screwing depth of the fixing member.

[0045] The reagent adding device provided by the embodiment of the utility model further comprises an experiment table 7 and a rack 8, and the rack 8 is arranged on the experiment table 7. A limiting groove is arranged on the rack 8, the output pipe 3 is embedded in the limiting groove, and the output end of the output pipe 3 is arranged towards the sample cup 6. Further, a limiting piece is arranged in the limiting groove, the limiting piece is used for fixing the position of the output pipe 3, and the movement of the output pipe 3 is prevented. In an embodiment, the first end of the limiting piece is rotatably connected to the position of the rack 8 close to the limiting groove, and the second end of the limiting piece is detachably (for example, in the mode of adsorption or the mode of fastening by a fastener) connected to the rack 8; the limiting piece cover is arranged above the limiting groove by rotating the limiting piece, the limiting piece cover is matched with the limiting groove, and a containing cavity for containing the output pipe 3 is formed. In addition, an anti-skid piece is further arranged in the limiting groove, and the output pipe 3 is prevented from sliding randomly in the process of running of the peristaltic pump 11.

[0046] In addition, the pipette 4 is also arranged on the rack 8. As shown in Figure 1 and Figure 2 , a hanging rod is arranged on the rack 8, a clamping groove is arranged on the pipette 4, the clamping groove is matched with the hanging rod, the pipette 4 is hung on the hanging rod, and the pipette 4 is convenient to take and place. In another embodiment, one of the pipette 4 and the rack 8 is provided with a magnetic piece, and the other is provided with a magnetic attraction accessory; the pipette 4 and the rack 8 are connected through magnetic adsorption, and under the action of an external force, the pipette 4 and the rack 8 can be separated. It should be noted that the weight sensor and the visual sensor can be arranged on the experiment table 7.

[0047] In addition, a sample placing piece is further arranged on the experiment table 7, a clamping groove is arranged on the sample placing piece, the sample cup 6 can be clamped in the clamping groove, and the sample cup 6 is prevented from being inclined to cause the internal solution to spill. A pipette gun placing piece is further arranged on the experiment table 7, a plurality of pipette gun heads are placed in the pipette gun placing piece, and the pipette 4 can select the corresponding pipette gun head according to the parameters of the reagent. A reagent bottle 5 containing a reagent is placed on the experiment table 7, and the pipette 4 is convenient to suck the reagent.

[0048] The reagent adding device provided by the embodiment of the utility model further comprises a robot 9, the robot 9 can be arranged on the experiment table 7 or directly placed on the bottom surface, and the robot 9 is convenient to operate. The robot 9 is connected with a controller, and under the condition that the controller controls the peristaltic pump 11 to run, as shown in Figure 1 , the robot 9 grasps the target sample cup 6 and moves the target sample cup 6 to a target position (the outlet end of the output pipe 3) to receive the reagent. Under the condition that the controller controls the peristaltic pump 11 and the air pump to stop running, the controller controls the robot 9 to move the target sample cup 6 added with the reagent to a target position (a storage position). It should be noted that under the condition that the target sample cup 6 added with the reagent needs to be measured in weight, the controller can control the robot 9 to move the target sample cup 6 to the weight sensor for measurement, and then move the target sample cup 6 to the storage position after the measurement is completed.

[0049] Furthermore, if the volume of the target sample cup 6 does not meet the target value, the controller controls the robot 9 to grasp the pipette 4 and move it above the target sample cup 6 to aspirate the reagent from the target sample cup 6, or to add reagent to the target sample cup 6, until the target value is reached. After completion, the controller controls the robot 9 to be placed on the rack 8, ready for the next use.

[0050] In this embodiment of the invention, the gripper of the robot 9 is not specifically limited; it only needs to be able to stably grip the sample cup 6 and / or the pipette 4. Figure 1 As shown, robot 9 is equipped with a structure that restricts sample cup 6, allowing for stable gripping of sample cup 6 while also enabling observation of the contents of sample cup 6. Furthermore, multiple robots 9 can be used in this embodiment to achieve alternating operations and improve dispensing efficiency. For example, two robots 9 can be used, one for gripping and moving sample cup 6, and the other for gripping and moving a pipette.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A reagent adding device characterized by comprising: The application relates to a reagent feeding device. The reagent feeding device comprises a peristaltic assembly, an air pump and a first switch valve, and a controller. The peristaltic assembly comprises a peristaltic pump, an inlet of the peristaltic pump is communicated with a reagent bottle through an input pipe, and an outlet of the peristaltic pump is communicated with a sample cup through an output pipe. The air pump has an inlet for communicating with air and an outlet communicated with the inlet of the peristaltic pump through an exhaust pipeline.

2. The reagent adding apparatus according to claim 1, characterized by The first switch valve is arranged on the exhaust pipeline.

3. The reagent adding apparatus according to claim 1, characterized by The controller is electrically connected with the peristaltic pump, the air pump and the first switch valve, respectively.

4. The reagent adding apparatus according to claim 1, characterized by The controller controls the peristaltic pump to run based on a target value, and controls the peristaltic pump to stop and the air pump to start after the target value is reached.

5. The reagent adding apparatus according to claim 1, wherein The peristaltic assembly further comprises a second switch valve and a third switch valve.

6. The reagent adding apparatus according to claim 5, wherein The second switch valve is arranged on the input pipe, and the third switch valve is arranged on the output pipe.

7. The reagent adding apparatus according to claim 1, wherein The second switch valve and the third switch valve are electrically connected with the controller, respectively.

8. The reagent adding apparatus according to claim 7, wherein The peristaltic assembly is multiple, the inlet of each peristaltic pump is communicated with the outlet of the air pump through the exhaust pipeline, and the first switch valve is arranged on each exhaust pipeline.

9. The reagent adding apparatus according to claim 7, wherein The reagent feeding device further comprises an optical sensor arranged in the output pipe. The optical sensor is electrically connected with the controller.

10. The reagent adding apparatus according to claim 7, wherein The controller controls the operation of the air pump based on the data of the optical sensor. The reagent feeding device further comprises a flow sensor arranged in the input pipe and / or the output pipe. The flow sensor is electrically connected with the controller. The reagent feeding device further comprises a weight sensor. The sample cup is arranged on the weight sensor. The weight sensor is electrically connected with the controller. The controller controls the operation of the peristaltic pump based on the data obtained by the weight sensor and the flow sensor. The reagent feeding device further comprises a pipette. The pipette is used for inputting the same kind of reagent into the sample cup after the peristaltic pump inputs the reagent, so that the total amount of the reagent inputted into the sample cup by the peristaltic pump and the pipette reaches a target value. The reagent feeding device further comprises a visual sensor. The visual sensor and the pipette are electrically connected with the controller, respectively. The controller controls the pipette to input the same kind of reagent into the sample cup based on the current data obtained by the visual sensor. The reagent feeding device further comprises an experimental table and a placing rack. The placing rack is arranged on the experimental table. The placing rack is provided with a limiting groove, the output pipe is embedded in the limiting groove, and the outlet of the output pipe is arranged towards the sample cup. The pipette is arranged on the placing rack. The reagent feeding device further comprises a robot. The robot is electrically connected with the controller. The controller is used for controlling the robot to grab the sample cup and move it to a target position, and / or is used for controlling the robot to grab the pipette and move it to a target position.

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