Titration speed regulation device for drug inspection and analysis

Abstract

The invention relates to the technical field of titrimetric analysis, in particular to a titrimetric speed regulation device for drug inspection and analysis, which comprises a support column, a liquid feeding hopper arranged at the top end of the support column, a transport pipe fixedly communicated with the bottom end of the liquid feeding hopper, an information input assembly fixedly connected to the support column, and a control system in signal connection with the information input assembly. A supporting box is arranged on the lower portion of the supporting stand column, the end, away from the liquid feeding hopper, of the conveying pipe fixedly communicates with a speed regulating valve, the speed regulating valve is fixedly connected with the inner wall of the supporting box, the speed regulating valve sequentially comprises a liquid inlet cavity, a speed regulating cavity and a diameter regulating cavity, the liquid inlet cavity is fixedly connected with a first electromagnetic valve, and one side of the first electromagnetic valve is fixedly connected with a water pressure sensor. According to the invention, the density of the fed liquid is comprehensively calculated by detecting the water pressure of the liquid, and then the density factor is considered in the control of flow rate regulation, so that the accuracy of titration speed regulation is improved.

Description

Technical Field

[0001] The invention relates to the technical field of titration analysis, and in particular to a titration speed regulating device used for drug inspection and analysis. Background Art

[0002] In drug inspection and analysis, the titration speed regulating device can be applied to a variety of titration analysis methods, such as acid-base titration, redox titration, precipitation titration, etc. By precisely adjusting the dripping speed and droplet size, the active ingredients and impurity content in the drug can be accurately determined.

[0003] Conventional titration speed control devices basically include a support column, a dosing hopper for adding reagents, and a transport tube for transporting reagents. In order to improve the accuracy of titration analysis and the convenience of operation, the titration speed is generally adjusted by designing a speed control mechanism to control the area of ​​reagent circulation or adding or subtracting air pressure.

[0004] Most titration speed regulating devices do not consider the influence of different liquid densities on flow rate during the speed regulation process. When other conditions such as pipe diameter remain unchanged, the greater the liquid density, the smaller the flow rate. This is because liquids with high density have greater intermolecular interaction forces and poor fluidity, requiring more energy to make them flow. Therefore, liquids with different densities have different flow rate regulation conditions, and operators are required to make visual adjustments during use, which is time-consuming and labor-intensive, and has an impact on the inspection and analysis of drugs. Therefore, it is necessary to propose a titration speed regulating device for drug inspection and analysis that can consider the influence of liquid density on flow rate and realize intelligent speed regulation. Summary of the invention

[0005] To solve the above problems, the present invention provides a titration speed regulation device for drug inspection and analysis, which comprehensively calculates the density of the injected liquid by detecting the water pressure of the liquid, and then takes the density factor into consideration in the control of flow rate regulation, thereby improving the accuracy of titration speed regulation.

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a titration speed regulating device for drug inspection and analysis, comprising a support column, a liquid feeding bucket is placed on the top of the support column, a transport pipe is fixedly connected to the bottom of the liquid feeding bucket, an information input component for inputting information is fixedly connected to the support column, and the information input component signal is connected to a control system for calculating liquid density and liquid flow area, a support box is provided at the lower part of the support column, an end of the transport pipe away from the liquid feeding bucket passes through the top wall of the support box and extends into the support box, and an end of the transport pipe away from the liquid feeding bucket is fixedly connected to a speed regulating valve, the speed regulating valve is fixedly connected to the inner wall of the support box, and the speed regulating valve includes a liquid inlet cavity, a speed regulating cavity and a diameter regulating cavity from top to bottom;

[0007] A first solenoid valve is fixedly connected to the connection point between the liquid inlet chamber and the speed regulating chamber, a water pressure sensor is fixedly connected to the first solenoid valve on the side close to the liquid inlet chamber, a liquid passage connected to the first solenoid valve is provided in the speed regulating chamber, a flow sensor is fixedly connected in the liquid passage, an adjusting component for adjusting the liquid flow area is provided at the end of the liquid passage away from the first solenoid valve, and the adjusting component, the flow sensor, the water pressure sensor and the first solenoid valve are all connected to the control system signal.

[0008] The technical principles of the above scheme are as follows:

[0009] The support column is used as the main supporting structure of the entire device to ensure the stability and durability of the equipment; the liquid feeding hopper is located at the top of the support column to accommodate and feed the liquid to be titrated, the transport pipe connects the liquid feeding hopper and the speed regulating valve to ensure that the liquid can flow smoothly into the speed regulating valve, the information input component is fixedly connected to the support column, which is convenient for the operator to enter relevant information, receive the signal of the information input component, and calculate the liquid density and liquid flow area according to the preset algorithm, so as to achieve precise control of the titration speed, the support box is located at the lower part of the support column, and provides support and protection for the speed regulating valve and other components, the speed regulating valve, including the liquid inlet chamber, the speed regulating chamber and the diameter regulating chamber, controls the liquid titration speed, the water pressure sensor monitors the water pressure data in the liquid inlet chamber, and transmits the data to the control system, the flow sensor monitors the flow data in the liquid channel, and transmits the data to the control system.

[0010] The above scheme has the following beneficial effects:

[0011] 1. In this solution, through the information input component and control system, the user can input and receive various information about the titration operation in real time, such as titration requirements, droplet size requirements, and the amount of reagent added, which is conducive to the subsequent calculation of the density of the liquid. The real-time feedback mechanism helps the user to better control the titration process and discover problems in time.

[0012] 2. This solution calculates the density of the liquid through a control system combined with the measurement of water pressure, and calculates and controls the flow area of ​​the liquid based on the calculated liquid density to accurately control the liquid flow rate; considering the density of the liquid makes the flow rate control of this device more reasonable and effective, reducing the interference of different densities on the liquid flow rate control.

[0013] 3. This solution, through the integrated control system, water pressure sensor, flow sensor, first solenoid valve and regulating assembly, can achieve precise control of liquid flow and flow rate during the titration process, which is crucial for drug inspection and analysis because it can ensure the consistency and accuracy of each titration operation, thereby improving the reliability and repeatability of the analysis.

[0014] Furthermore, the adjustment component includes a flexible arm, which is slidably matched with the liquid channel on one side of the flexible arm close to the liquid channel, and the area of ​​the flexible arm close to the liquid channel is larger than the cross-sectional area of ​​the bottom wall of the liquid channel. The end of the flexible arm away from the liquid channel is fixedly connected to a rotating shaft, and the rotating shaft is rotatably connected to the side wall of the speed regulation chamber. The end of the rotating shaft away from the flexible arm passes through the side wall of the speed regulation chamber and is fixedly connected to a driving component for providing a rotational driving force.

[0015] Beneficial effects: The design of the flexible arm enables it to slide closely with the liquid channel. By adjusting the position of the flexible arm, the flow area of ​​the liquid channel can be effectively changed, thereby achieving precise regulation of the liquid flow rate. In addition, since the area of ​​the flexible arm close to the liquid channel is larger than the cross-sectional area of ​​the bottom wall of the liquid channel, this design ensures the sensitivity and accuracy of the regulation.

[0016] Furthermore, the side of the deflector arm close to the liquid passage is a trapezoidal structure, and both side edges of the trapezoid are arc edges.

[0017] Beneficial effects: The trapezoidal structure design makes the contact surface between the arm and the liquid channel smoother, reducing the resistance and turbulence of the fluid when passing through; the arc edge design further enhances this smoothness, allowing the fluid to flow more smoothly, thereby improving the flow regulation accuracy and stability of the titration speed regulation device. In addition, the trapezoidal structure has better structural strength than other shapes. When subjected to external forces, the trapezoidal structure can better disperse and resist these forces, thereby protecting the arm and the liquid channel from damage. The arc edge design further enhances the toughness of the arm, making it more durable.

[0018] Furthermore, a tilt sensor is fixedly connected to the flexure arm, and both the tilt sensor and the drive assembly are connected to the control system signal.

[0019] Beneficial effects: The tilt sensor can monitor the tilt angle and tilt direction of the arm in real time. This information is conducive to the precise control of the flow rate and flow rate during the titration process. The sensor feeds back the real-time monitored data to the control system. The control system adjusts the output of the drive component based on this data, thereby changing the flow area of ​​the liquid channel and achieving precise control of the titration speed.

[0020] Furthermore, a plurality of diameter adjusting holes are provided on the bottom wall of the diameter adjusting cavity, and the diameters of the plurality of diameter adjusting holes are different. The diameter adjusting holes are all fixedly connected with a second solenoid valve, and the second solenoid valves are all connected with control system signals.

[0021] Beneficial effect: Multiple diameter adjustment holes of different sizes provide a variety of droplet size options, so that the titration speed regulation device can adapt to different types of titration experiments and different experimental conditions; whether it is a high-speed titration or a low-speed titration, the experimental requirements can be met by selecting a suitable diameter adjustment hole.

[0022] Furthermore, a stopper is fixedly connected to the bottom of the diameter adjusting cavity.

[0023] Beneficial effects: The stopper is set to protect the droplet during free fall, reduce the influence of environmental factors on the titration flow rate and the reagent itself, and improve the rationality of the experimental results.

[0024] Further, the control system includes a computing unit and a driving unit for receiving a signal to intelligently drive and control the liquid flow area;

[0025] The computing unit includes a preset module, a collection module and a processing module;

[0026] A preset module for receiving liquid dosage volume, flow rate requirements and droplet size requirements entered by an operator;

[0027] A collection module, which is used for the water pressure sensor to collect the water pressure data of the liquid in the liquid inlet cavity and the flow sensor to collect the flow data of the liquid in the liquid passage pipe;

[0028] The processing module is used to calculate the liquid density according to the density calculation formula using the water pressure data and the liquid volume as input, and then calculate the flow area data according to the flow rate calculation formula using the flow rate demand data and the flow data as input to transmit to the drive unit.

[0029] Beneficial effects: The control system can receive parameters such as liquid volume, flow rate requirements and droplet size requirements entered by the operator, realizing the automatic setting of the titration process. Through data collection from the water pressure sensor and flow sensor, and processing by the computing unit, the control system can adjust the drive unit in real time, intelligently control the flow area of ​​the liquid, and thus accurately adjust the titration speed.

[0030] Furthermore, in the processing module, the flow area is calculated by the following formula:

[0031]

[0032] Where A is the flow area, v x is the droplet size entered by the operator, f(v x ) is the velocity attenuation function, the result is a constant, ρ is the density of the test liquid, Q m is the liquid mass flow rate detected by the flow sensor, V x Flow rate requirements entered by the operator.

[0033] Beneficial effect: In order to control the droplet size, the diameter-adjusting hole will affect the liquid flow rate. This formula comprehensively considers multiple factors such as the droplet size input by the operator, the flow rate attenuation function result, the density of the detected liquid, the liquid mass flow rate detected by the flow sensor, and the flow rate requirement input by the operator. These factors work together to calculate the flow area, making the calculation result more accurate and reliable.

[0034] Further, the driving unit includes a corner processing module, a corner driving module and a switch driving module;

[0035] Angle processing module, used for calculating the rotation angle of the flexible arm according to the calculated flow area;

[0036] The turning angle driving module is used to start the driving component with the turning angle calculated by the turning angle processing module as the target angle, and to perform driving control in combination with the inclination angle data collected by the inclination sensor;

[0037] The switch driving module is used to drive the opening of the first solenoid valve and the corresponding opening of the second solenoid valve.

[0038] Beneficial effects: According to the flow area calculated by the calculation module, the rotation angle of the arm is accurately calculated, ensuring the accurate correspondence between the flow area and the rotation angle of the arm, thereby realizing accurate control of the titration speed; by accurately controlling the rotation angle of the arm and the opening state of the solenoid valve, accurate control of the titration speed is realized, the precision and accuracy of the titration experiment are improved, and the experimental error is reduced; by real-time monitoring of the data of the tilt sensor, the rotation of the arm is adjusted in real time, which can automatically adapt to various changes during the titration process, such as changes in liquid density, changes in flow rate, etc., thereby maintaining the stability of the titration speed.

[0039] Furthermore, in the switch driving module, when the operator enters data, the first solenoid valve is driven to open, and then the corresponding second solenoid valve is driven to open according to the input droplet size requirement.

[0040] Beneficial effects: After the operator enters the data, the system can immediately respond and drive the first solenoid valve to open, reducing the delay time of system startup, allowing the liquid to start flowing quickly and prepare for the subsequent titration process; after the first solenoid valve is opened, the system quickly matches and drives the corresponding second solenoid valve to open according to the droplet size requirements entered by the operator. The fast matching and opening mechanism ensures the continuity and smoothness of the titration process and reduces the time waste caused by the delay in the opening of the solenoid valve.

[0041] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is an axonometric diagram of the overall structure of an embodiment of a titration speed regulating device for drug inspection and analysis of the present invention;

[0043] Figure 2 It is a front cross-sectional view of a supporting box of an embodiment of a titration speed regulating device for drug inspection and analysis of the present invention;

[0044] Figure 3 A side cross-sectional view of a supporting box of an embodiment of a titration speed regulating device for drug inspection and analysis of the present invention;

[0045] Figure 4 The present invention is a schematic diagram of the operation of a control system of an embodiment of a titration speed regulating device for drug inspection and analysis.

[0046] The figure marks in the drawings of the specification include: 1. Support column; 2. Liquid feeding bucket; 3. Transport pipe; 4. Touch screen; 5. Support box; 6. Speed ​​regulating valve; 601. Liquid inlet chamber; 602. Speed ​​regulating chamber; 603. Diameter adjusting chamber; 7. First solenoid valve; 8. Water pressure sensor; 9. Liquid passage; 10. Flow sensor; 11. Flexure arm; 12. Rotating shaft; 13. Drive assembly; 14. Tilt sensor; 15. Diameter adjusting hole; 16. Second solenoid valve; 17. Stop block. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The following is further described in detail through specific implementation methods:

[0051] Embodiment 1:

[0052] As attached Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown: a titration speed regulation device for drug inspection and analysis, including a supporting column 1, a liquid feeding hopper 2 is placed on the top of the supporting column 1, and a transport pipe 3 is welded and connected to the bottom of the liquid feeding hopper 2. The operator puts the reagent for drug detection into the liquid feeding hopper 2, and the reagent liquid is transported downward along the transport pipe 3.

[0053] An information input component for inputting information is fixedly connected to the support column 1, and the information input component includes a touch screen 4, on which a plurality of droplet size options and an input box for liquid volume and flow rate requirements are displayed, and the touch screen 4 signal is connected to a control system.

[0054] A support box 5 is provided at the lower part of the support column 1, and the end of the transport pipe 3 away from the liquid feeding bucket 2 passes through the top wall of the support box 5 and extends into the support box 5, and the end of the transport pipe 3 away from the liquid feeding bucket 2 is fixedly connected to a speed regulating valve 6, and a plurality of connecting rods are welded to the outer wall of the speed regulating valve 6, and the ends of the connecting rods away from the speed regulating valve 6 are welded to the inner wall of the support box 5. The reagent liquid flows down the transport pipe 3 and enters the speed regulating valve 6 for titration flow rate adjustment and droplet size control. Since the flow rate adjustment and droplet size control processes are easily affected by external factors, especially the instability of the speed regulating valve 6, the stability of the speed regulating valve 6 is improved by the support box 5 to achieve a more precise adjustment process.

[0055] The speed regulating valve 6 includes a liquid inlet chamber 601, a speed regulating chamber 602 and a diameter regulating chamber 603 from top to bottom. A first solenoid valve 7 is welded at the connection between the liquid inlet chamber 601 and the speed regulating chamber 602. A water pressure sensor 8 is welded to the first solenoid valve 7 on the side close to the liquid inlet chamber 601. The water pressure sensor 8 is connected to the control system signal. A liquid passage 9 connected to the first solenoid valve 7 is provided in the speed regulating chamber 602. A flow sensor 10 is welded in the liquid passage 9. The flow sensor 10 and the first solenoid valve 7 are both connected to the control system signal. When the operator is typing in information, the reagent liquid stays and accumulates in the liquid inlet chamber 601. At this time, the water pressure sensor 8 collects the water pressure of the liquid. When the operator completes typing in the information, the control system drives the first solenoid valve 7 to open so that the liquid enters the speed regulating chamber 602 for flow rate adjustment, thereby realizing intelligent water pressure collection, which is beneficial to the subsequent calculation of the flow area of ​​the liquid.

[0056] An adjusting component for adjusting the liquid flow area is provided at one end of the liquid passage 9 away from the first solenoid valve 7, and the adjusting component includes a flexible arm 11, and the flexible arm 11 slides with the liquid passage 9 on the side close to the liquid passage 9, and the area of ​​the flexible arm 11 on the side close to the liquid passage 9 is larger than the cross-sectional area of ​​the bottom wall of the liquid passage 9, and a rotating shaft 12 is welded to the end of the flexible arm 11 away from the liquid passage 9, and the rotating shaft 12 is rotatably connected to the side wall of the speed regulating chamber 602, and the rotating shaft 12 passes through the side wall of the speed regulating chamber 602 at one end away from the flexible arm 11 and is fixedly connected to a driving component 13 for providing a rotational driving force, and the driving component 13 includes a servo motor, and the servo motor is located in the speed regulating chamber 602 outer wall, a fixed box is sleeved on the outside of the servo motor, the servo motor is fixedly connected to the fixed box through a coupling, the servo motor output shaft passes through the side wall of the speed regulating chamber 602 and is coaxially fixedly connected to the rotating shaft 12, when the arm 11 is close to the side of the liquid passage 9 and is completely closed with the liquid passage 9, it can block the water flow and make the flow area of ​​the reagent liquid 0, and when the servo motor is driven to rotate, the arm 11 is tilted, and a gap is generated between the arm 11 and the liquid passage 9, and the reagent liquid flows out through the gap, and the size of the gap is controlled by controlling the inclination of the arm 11, thereby realizing the control of the flow area and facilitating the control of the flow rate.

[0057] The side of the flexible arm 11 close to the liquid passage 9 is a trapezoidal structure, and the two side edges of the trapezoid are arc edges. The trapezoidal structure is helpful to reduce the impact of the liquid falling through the first solenoid valve 7 on the flexible arm 11, thereby increasing the service life of the flexible arm 11. The design of the arc edge can reduce the friction between the flexible arm 11 and the wall of the liquid passage 9 when the flexible arm 11 rotates, reduce the driving force required for rotation, and improve the efficiency of rotation.

[0058] In addition, a tilt sensor 14 is fixed to the flexible arm 11 by bolts. The tilt sensor 14 and the servo motor are both connected to the control system signal. The tilt sensor 14 can detect the rotation angle of the flexible arm 11. The control system controls the drive of the servo motor with the rotation angle collected by the tilt sensor 14 as feedback, which can achieve precise rotation and precise control of the flow area, thereby achieving precise adjustment of the flow rate.

[0059] The control system includes a calculation unit and a driving unit for receiving signals to intelligently drive and control the liquid flow area. The calculation unit includes a preset module, a collection module and a processing module.

[0060] The preset module receives the data of liquid usage volume, flow rate requirement and droplet size requirement entered by the operator, and transmits the liquid usage volume and flow rate requirement to the processing template respectively.

[0061] The acquisition module collects the water pressure data of the liquid in the liquid inlet cavity 601 through the water pressure sensor 8, and collects the flow data of the liquid in the liquid passage pipe through the flow sensor 10, and transmits the water pressure data and the flow data to the processing template.

[0062] The processing module receives some data and calculates the density according to the formula:

[0063]

[0064] Based on water pressure data P and liquid volume V x As input, after calculating the liquid density ρ, the flow area is calculated by the following formula:

[0065]

[0066] Where A is the flow area, v x is the droplet size entered by the operator, f(v x ) is the velocity attenuation function, the result is a constant, ρ is the density of the test liquid, Q m The flow sensor detects the liquid mass flow rate of 10, V x The flow rate demand input by the operator takes the flow rate demand data and flow data as input, calculates the flow area data and transmits it to the drive unit.

[0067] The driving unit includes a corner processing module, a corner driving module and a switch driving module.

[0068] The corner processing module calculates the rotation angle of the flexible arm 11 according to the calculated flow area, and transmits the rotation angle to the corner driving module.

[0069] The angle driving module receives the rotation angle calculated by the angle processing module as the target angle, sends a signal to drive the servo motor to rotate, and compares the inclination data collected by the inclination sensor 14 with the target angle. When the inclination data collected by the sensor is equal to the target angle, it sends a signal to stop driving the servo motor.

[0070] The switch driving module drives the first solenoid valve 7 to open when the operator enters data.

[0071] Embodiment 2:

[0072] As attached Figure 3 As shown, the difference from Example 1 is that a plurality of diameter adjusting holes 15 are provided on the bottom wall of the diameter adjusting cavity 603, and the diameters of the plurality of diameter adjusting holes 15 are different. The diameter adjusting holes 15 with different apertures are provided for the operator to select the titration of different drop sizes. The diameter adjusting holes 15 are all fused with second solenoid valves 16, and the second solenoid valves 16 are all connected with the control system signal. The switch driving module drives the corresponding second solenoid valve 16 to open according to the input drop size requirement. When the reagent liquid flows into the diameter adjusting cavity 603, it falls out of the diameter adjusting cavity 603 through the diameter adjusting hole 15 selected by the operator and falls into the container to be reacted, thereby realizing the control of the reagent droplet size, improving the accuracy of the titration, and improving the rationality and scientificity of the medicine bottle detection experiment.

[0073] Embodiment 3:

[0074] As attached Figure 2 and Figure 3 As shown, the difference from Example 2 is that blocks 17 are welded around the bottom of the diameter-adjusting cavity 603. When the reagent droplets fall out of the diameter-adjusting cavity 603, the flow rate is easily affected by the pipeline that transports the liquid with a specific flow rate, making the flow rate adjustment inaccurate. The free fall method is adopted, and the block 17 is set to protect the droplets during the free fall, thereby reducing the impact of environmental factors on the titration flow rate and the reagent itself, and improving the rationality of the experiment.

[0075] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A titration speed regulating device for drug inspection and analysis, comprising a support column (1), a liquid feeding hopper (2) is placed on the top of the support column (1), and a transport pipe (3) is fixedly connected to the bottom of the liquid feeding hopper (2), characterized in that: An information input component for inputting information is fixedly connected to the support column (1), and the information input component is signal-connected to a control system for calculating liquid density and liquid flow area. A support box (5) is provided at the lower part of the support column (1). An end of the transport pipe (3) away from the liquid feeding bucket (2) passes through the top wall of the support box (5) and extends into the support box (5). An end of the transport pipe (3) away from the liquid feeding bucket (2) is fixedly connected to a speed regulating valve (6). The speed regulating valve (6) is fixedly connected to the inner wall of the support box (5). The speed regulating valve (6) comprises, from top to bottom, a liquid inlet cavity (601), a speed regulating cavity (602) and a diameter regulating cavity (603). A first electromagnetic valve (7) is fixedly connected to the connection point between the liquid inlet chamber (601) and the speed regulating chamber (602); a water pressure sensor (8) is fixedly connected to the side of the first electromagnetic valve (7) close to the liquid inlet chamber (601); a liquid passage (9) connected to the first electromagnetic valve (7) is provided in the speed regulating chamber (602); a flow sensor (10) is fixedly connected to the liquid passage (9); an adjustment component for adjusting the liquid flow area is provided at one end of the liquid passage (9) away from the first electromagnetic valve (7); the adjustment component, the flow sensor (10), the water pressure sensor (8) and the first electromagnetic valve (7) are all connected to the control system signal.

2. The titration speed regulating device for drug inspection and analysis according to claim 1, characterized in that: The regulating component comprises a flexible arm (11), wherein a side of the flexible arm (11) close to the liquid passage (9) is slidably matched with the liquid passage (9), an area of ​​the side of the flexible arm (11) close to the liquid passage (9) is larger than a cross-sectional area of ​​a bottom wall of the liquid passage (9), an end of the flexible arm (11) away from the liquid passage (9) is fixedly connected to a rotating shaft (12), the rotating shaft (12) is rotatably connected to a side wall of a speed regulating chamber (602), and an end of the rotating shaft (12) away from the flexible arm (11) passes through the side wall of the speed regulating chamber (602) and is fixedly connected to a driving component (13) for providing a rotational driving force.

3. The titration speed regulating device for drug inspection and analysis according to claim 2, characterized in that: The side of the deflecting arm (11) close to the liquid passage (9) is a trapezoidal structure, and both sides of the trapezoid are arc sides.

4. The titration speed regulating device for drug inspection and analysis according to claim 3, characterized in that: A tilt sensor (14) is fixedly connected to the deflection arm (11), and the tilt sensor (14) and the drive assembly (13) are both connected to control system signals.

5. The titration speed regulating device for drug inspection and analysis according to claim 4, characterized in that: The bottom wall of the diameter-adjusting cavity (603) is provided with a plurality of diameter-adjusting holes (15), the diameters of the plurality of diameter-adjusting holes (15) are different, and the diameter-adjusting holes (15) are all fixedly connected with a second electromagnetic valve (16), and the second electromagnetic valve (16) is connected with a control system signal.

6. The titration speed regulating device for drug inspection and analysis according to claim 5, characterized in that: A stopper (17) is fixedly connected to the bottom of the diameter adjustment cavity (603).

7. The titration speed regulating device for drug inspection and analysis according to claim 6, characterized in that: The control system includes a computing unit and a driving unit for receiving signals to intelligently drive and control the liquid flow area; The computing unit includes a preset module, a collection module and a processing module; A preset module for receiving liquid dosage volume, flow rate requirements and droplet size requirements entered by an operator; A collection module, used for receiving water pressure data of the liquid in the liquid inlet chamber (601) collected by the water pressure sensor (8) and flow rate data of the liquid in the liquid passage pipe collected by the flow rate sensor (10); The processing module is used to calculate the liquid density according to the density calculation formula using the water pressure data and the liquid volume as input, and then calculate the flow area data according to the flow rate calculation formula using the flow rate demand data and the flow data as input to transmit to the drive unit.

8. The titration speed regulating device for drug inspection and analysis according to claim 7, characterized in that: In the processing module, the flow area is calculated by the following formula: Where A is the flow area, v x is the droplet size entered by the operator, f(v x ) is the velocity attenuation function, the result is a constant, ρ is the density of the test liquid, Q m is the liquid mass flow rate detected by the flow sensor (10), V x Flow rate requirements entered by the operator.

9. The titration speed regulating device for drug inspection and analysis according to claim 8, characterized in that: The driving unit includes a corner processing module, a corner driving module and a switch driving module; A rotation angle processing module, used for calculating the rotation angle of the flexible arm (11) according to the calculated flow area; A turning angle driving module, used to start the driving component (13) with the turning angle calculated by the turning angle processing module as the target angle, and to perform driving control in combination with the inclination angle data collected by the inclination sensor (14); The switch driving module is used to drive the opening of the first solenoid valve (7) and the opening of the corresponding second solenoid valve (16).

10. The titration speed regulating device for drug inspection and analysis according to claim 9, characterized in that: In the switch drive module, when the operator enters data, the first electromagnetic valve (7) is driven to open, and then the corresponding second electromagnetic valve (16) is driven to open according to the droplet size requirement entered.

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