Convenient and automatic acid adding device for laboratory

Abstract

The invention discloses a convenient automatic acid feeder for a laboratory, and relates to the technical field of laboratory instruments. The main control module is arranged in the corrosion-resistant shell; the high-precision conveying module is arranged in the corrosion-resistant shell and connected to the corrosion-resistant liquid storage system through a corrosion-resistant fluid pipeline, and the high-precision conveying module comprises a driving part and a peristaltic pump driven by the driving part; the corrosion-resistant liquid storage system is provided with a connector which is directly matched with and hermetically connected with a reagent bottle; the man-machine interaction module is arranged on the surface of the corrosion-resistant shell; the safety protection unit is arranged on the corrosion-resistant shell; through modular design and programmed control, accurate, safe and automatic addition of the strongly corrosive acid reagent is realized, and the problems of dangerous operation, poor precision, low efficiency, environmental pollution and the like in a traditional acid adding mode are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of laboratory instrument technology, and specifically to a convenient automatic acid dispenser for laboratories. Background Technology

[0002] In chemical analysis laboratories, especially during pretreatment processes such as heavy metal detection, organic matter digestion, and sample digestion, it is frequently necessary to measure and add highly corrosive acids such as nitric acid, hydrochloric acid, sulfuric acid, and hydrofluoric acid. Currently, commonly used methods for adding acid in laboratories include manual pipettes, graduated cylinders, and traditional peristaltic pumps. While these methods achieve liquid transfer to some extent, they still suffer from inconvenience, low precision, and significant safety risks.

[0003] Traditional peristaltic pump methods have significant limitations in adapting to standard laboratory reagent bottles. Most devices cannot be used directly with conventional laboratory reagent bottles and require the acid solution to be transferred to a dedicated storage tank. This not only increases the number of operational steps and the risk of reagent exposure but also limits the versatility and convenience of the equipment, especially when processing large batches of samples. Summary of the Invention

[0004] The purpose of this invention is to provide a convenient automatic acid dispenser for the laboratory, so as to solve the problems that existing acid dispensing equipment cannot be directly adapted to standard laboratory reagent bottles, is inconvenient to use, and poses safety hazards.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a convenient automatic acid dispenser for laboratories, comprising a corrosion-resistant outer shell; The main control module is located inside the corrosion-resistant housing; A high-precision delivery module is housed within the corrosion-resistant housing and connected to a corrosion-resistant liquid storage system via a corrosion-resistant fluid pipeline. The high-precision delivery module includes a drive component and a peristaltic pump driven by the drive component. The corrosion-resistant liquid storage system is equipped with an interface for direct fitting and sealing connection to reagent bottles; The human-computer interaction module is located on the surface of the corrosion-resistant outer shell; And a safety protection unit, which is located on the corrosion-resistant outer shell; The main control module is electrically connected to the drive unit, the human-machine interaction module and the safety protection unit, respectively, and is used to receive user commands, control the programmed operation of the drive unit, process sensor signals and coordinate the work of each module. Under the control of the main control module, the driving component drives the peristaltic pump to precisely deliver the acidic reagent from the corrosion-resistant storage system to the outlet at a set volume and flow rate. The human-computer interaction module is used to allow users to set acid addition parameters, call preset programs, and display the equipment operating status in real time. The safety protection unit is used to monitor potential hazards and perform safety protection actions during equipment operation.

[0006] Furthermore, the peristaltic pump adopts a double roller structure and is fitted with a Teflon pump tube inside. The top of the corrosion-resistant housing is provided with an opening. The drive component is installed at the bottom of the peristaltic pump and extends into the interior of the corrosion-resistant housing through the opening. The outer wall of the peristaltic pump is provided with a mounting plate. The mounting plate is fixed to the top plate of the corrosion-resistant housing by locking components provided around its perimeter.

[0007] Furthermore, the interior of the corrosion-resistant shell is provided with a partition, the main control module is installed on the top of the partition, the bottom of the partition is provided with a power supply module for supplying power to the drive components and each module, and the top of the partition is also provided with a wireless transmission module electrically connected to the main control module.

[0008] Furthermore, the corrosion-resistant liquid storage system includes an adapter, a liquid guide tube, and a pressure balancing component. The adapter is sealed and connected to the end of the corrosion-resistant fluid pipeline away from the peristaltic pump. The longitudinal section of the adapter is a hollow convex shape, and its bottom large-diameter section is provided with a threaded part, which is threaded to the mouth of the reagent bottle. The adapter is compatible with the reagent bottles of standard specifications of 500mL, 1L, and 2.5L.

[0009] Furthermore, the bottom of the adapter is provided with a sealing ring, the bottom of which fits against the top of the reagent bottle. The liquid guide tube is fixedly installed on the adapter and connected to the corrosion-resistant fluid pipeline. The pressure balancing component is inserted into the top plate of the adapter, and the pressure balancing component is a hydrophobic PTFE filter.

[0010] Furthermore, the human-computer interaction module is a color touch screen that supports editing of acid addition programs, one-click access to commonly used methods, and query of operation records. It can store at least 50 sets of user-defined acid addition schemes.

[0011] Furthermore, the safety protection unit includes a leakage detection sensor, an emergency stop button, and a splash guard. The leakage detection sensor is installed at the bottom of the pump head of the peristaltic pump. The emergency stop button is located on the top plate of the corrosion-resistant housing and on one side of the human-machine interface module. The splash guard is made of PP material and is fitted onto the corrosion-resistant fluid pipeline at the outlet. Its shape is a cone with a gradually increasing outer diameter.

[0012] Furthermore, it also includes a weighing tray located outside the corrosion-resistant outer shell. A weighing sensor is embedded in the top of the weighing tray. The weighing sensor is electrically connected to the main control module. The reagent bottle is placed on top of the weighing tray after being connected to the adapter. The bottom of the weighing tray is provided with a suction cup, and the top is provided with a surrounding ring for limiting the position of the reagent bottle.

[0013] Furthermore, it also includes a multi-bottle system, which comprises: A multi-channel fluid pipeline consists of a delivery tube and at least two branch tubes. One end of the delivery tube is connected to the inlet of the peristaltic pump, and the branch tubes are used to connect at least two independent reagent bottles respectively. The inlet tray is sealed to the other end of the delivery pipe, and the branch pipes are arranged in a ring and inserted into the inlet tray. One-way solenoid valves are installed on each of the branch pipes. The one-way solenoid valves are electrically connected to the main control module and are controlled by the main control module to selectively connect the liquid path of one of the reagent bottles to the high-precision delivery module.

[0014] Furthermore, the human-computer interaction module provides a program editing interface for users to edit and store an addition sequence program containing multiple steps. Each step independently sets the target reagent bottle, addition volume, and addition flow rate. The main control module is configured to automatically control the opening of the one-way solenoid valve of the corresponding step when executing the addition sequence program, and control the high-precision delivery module to add according to the set parameters. After the current step is completed, it automatically switches to the next sequential step.

[0015] Compared with existing technologies, the present invention provides a convenient automatic acid dispenser for laboratories. Through a corrosion-resistant liquid storage system, it can be directly adapted to and sealed to laboratory standard reagent bottles. This avoids the problems of traditional peristaltic pump equipment, which cannot directly use original reagent bottles and requires reagent transfer, resulting in cumbersome operation and high exposure risks. At the same time, with the help of the precise programmed control of the high-precision delivery module and the synergy of multiple safety protection units, the process of adding highly corrosive acid reagents is fully enclosed, automated, and highly precise. This not only reduces the health risks and experimental errors of operators, but also effectively prevents acid mist volatilization, and improves the safety, standardization, and overall efficiency of laboratory pretreatment work. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the overall structure of the convenient automatic acid adder for the laboratory provided in this embodiment of the invention; Figure 2 This is a schematic diagram of the peristaltic pump and corrosion-resistant housing components provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal integral component structure of the corrosion-resistant outer shell provided in an embodiment of the present invention; Figure 4 This is a cross-sectional view of the reagent bottle and adapter connector components provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of components such as the weighing sensor and weighing tray provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the components of the multi-bottle combined system provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Corrosion-resistant housing; 2. Main control module; 3. Corrosion-resistant fluid piping; 4. Drive unit; 5. Peristaltic pump; 6. Reagent bottle; 7. Human-machine interface module; 8. Mounting plate; 9. Locking component; 10. Partition plate; 11. Power module; 12. Wireless transmission module; 13. Adapter connector; 14. Liquid guide tube; 15. Pressure balancing component; 16. Threaded part; 17. Sealing ring; 18. Leakage detection sensor; 19. Emergency stop button; 20. Splash shield; 21. Weighing tray; 22. Weighing sensor; 23. Suction cup; 24. Enclosing ring; 25. Delivery pipe body; 26. Branch pipe body; 27. Inlet tray; 28. One-way solenoid valve. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] As attached Figure 1 To be continued Figure 4 As shown: Example 1: This invention provides a convenient automatic acid dispenser for laboratories, including a corrosion-resistant outer shell 1; The main control module 2 is located inside the corrosion-resistant housing 1; A high-precision delivery module is housed inside the corrosion-resistant housing 1 and connected to the corrosion-resistant liquid storage system via a corrosion-resistant fluid pipeline 3. The high-precision delivery module includes a drive component 4 and a peristaltic pump 5 driven by the drive component 4. The corrosion-resistant liquid storage system is provided with an interface for direct fitting and sealing connection of reagent bottle 6; Human-computer interaction module 7 is disposed on the surface of the corrosion-resistant outer shell 1; And a safety protection unit, which is provided on the corrosion-resistant outer shell 1; The main control module 2 is electrically connected to the drive unit 4, the human-machine interaction module 7 and the safety protection unit, respectively, and is used to receive user instructions, control the programmed operation of the drive unit 4, process sensor signals and coordinate the work of each module. Under the control of the main control module 2, the drive component 4 drives the peristaltic pump 5 to accurately deliver the acidic reagent from the corrosion-resistant storage system to the outlet at a set volume and flow rate. The human-computer interaction module 7 is used to allow users to set acid addition parameters, call preset programs, and display the equipment operating status in real time. The safety protection unit is used to monitor potential hazards and perform safety protection actions during equipment operation.

[0021] It should be noted that by directly adapting and sealing the corrosion-resistant liquid storage system to the standard laboratory reagent bottle 6, the problems of traditional peristaltic pump 5 equipment being unable to directly use the original reagent bottle 6 and requiring reagent transfer, which leads to cumbersome operation and high exposure risks, are avoided. At the same time, with the help of the precise programmed control of the high-precision delivery module and the synergy of multiple safety protection units, the process of adding highly corrosive acid reagents is fully enclosed, automated, and highly precise. This not only reduces the health risks and experimental errors of operators, but also effectively prevents acid mist volatilization, and improves the safety, standardization, and overall efficiency of laboratory pretreatment work.

[0022] Specifically, the control software running on the main control module 2 includes: a user instruction parsing module, a motor drive control module, a sensor data acquisition and processing module, an acid addition sequence execution engine, and a safety monitoring and alarm processing module. These modules work together to achieve the aforementioned programmed control, status monitoring, and safety protection functions.

[0023] The main control module 2 also stores calibration parameters for the peristaltic pump, including the correspondence between the number of motor stepping pulses and the delivery volume. When the user sets the added volume and flow rate, the main control module 2 calculates the required total number of pulses and pulse frequency based on the correspondence, and controls the stepper motor (drive unit 4) to run through the drive circuit, thereby achieving precise programmed control of the added volume and flow rate.

[0024] In this embodiment: the peristaltic pump 5 adopts a double roller structure and is fitted with a Teflon pump tube inside. The top of the corrosion-resistant housing 1 is provided with an opening. The drive component 4 is installed at the bottom of the peristaltic pump 5 and extends into the interior of the corrosion-resistant housing 1 through the opening. The outer wall of the peristaltic pump 5 is provided with a mounting plate 8. The mounting plate 8 is fixed to the top plate of the corrosion-resistant housing 1 by locking components 9 provided around it.

[0025] It should be noted that, compared to a single-roller peristaltic pump, the dual-roller peristaltic pump 5 provides a more continuous fluid output when pumping liquids, reduces flow pulsation, and improves the stability of volumetric metering. The Teflon (PTFE) pump tubing exhibits excellent corrosion resistance to common strong acids such as concentrated nitric acid, hydrochloric acid, and sulfuric acid, extending the service life of critical consumables. The bottom-mounted, housing-through-the-outlet connection of the drive component 4 (a stepper motor) facilitates spatial separation of the power unit (stepper motor) from the pump head, which may come into contact with liquid, thus improving internal layout and heat dissipation. The design of the mounting plate 8 and locking element 9 allows for easy installation, commissioning, replacement, and maintenance of the peristaltic pump 5 module from the top of the housing.

[0026] Specifically: The peristaltic pump 5, driven by a stepper motor, provides a flow rate range of 0.1-100 mL / min, a minimum liquid volume of 0.1 mL, and an accuracy error of ≤±1%.

[0027] The peristaltic pump 5 is equipped with a Teflon pump tube, which has an inner diameter of 2.0 mm and a wall thickness of 0.8 mm.

[0028] In this embodiment: the interior of the corrosion-resistant shell 1 is provided with a partition 10, the main control module 2 is installed on the top of the partition 10, the bottom of the partition 10 is provided with a power supply module 11 for supplying power to the drive component 4 and each module, and the top of the partition 10 is also provided with a wireless transmission module 12 electrically connected to the main control module 2.

[0029] It should be noted that the partition 10 achieves functional zoning within the equipment. Placing electronic components such as the main control module 2 and the wireless transmission module 12 above the partition 10, while placing the power module 11 below, provides a degree of physical isolation between high-voltage and low-voltage electrical components. This helps reduce electrical interference, improves system stability, and facilitates the routing and management of internal cables. The addition of the wireless transmission module 12 (such as a Wi-Fi or Bluetooth module) enables the equipment to communicate wirelessly with a Laboratory Information System (LIMS), a computer, or a mobile terminal, facilitating remote monitoring of operational status, uploading experimental data, or receiving control commands, thus enhancing the equipment's information integration capabilities.

[0030] In this embodiment: the corrosion-resistant liquid storage system includes an adapter 13, a liquid guide tube 14, and a pressure balancing component 15. The adapter 13 is sealed and connected to the end of the corrosion-resistant fluid pipeline 3 away from the peristaltic pump 5. The longitudinal section of the adapter 13 is a hollow convex shape, and its bottom large-diameter section is provided with a threaded part 16. The threaded part 16 is threadedly connected to the bottle mouth of the reagent bottle 6. The adapter 13 is compatible with the reagent bottles 6 of standard specifications of 500mL, 1L, and 2.5L.

[0031] It should be noted that the "U"-shaped longitudinal section design of the adapter connector 13 facilitates connection of the narrower upper part to fluid lines, while the wider lower part accommodates the threaded portion 16 to match the 6-necked reagent bottle. The use of a standard threaded connection (such as a GL45 standard thread) ensures a direct and reliable seal with the 6-necked reagent bottles of most common laboratory sizes, achieving equipment versatility and eliminating the hassle of custom containers or reagent transfer. It explicitly supports common sizes such as 500mL, 1L, and 2.5L, covering the common needs of daily experiments.

[0032] In this embodiment: the bottom of the adapter 13 is provided with a sealing ring 17, the bottom of the sealing ring 17 is in contact with the top of the reagent bottle 6, the liquid guide tube 14 is fixedly installed on the adapter 13 and connected to the corrosion-resistant fluid pipeline 3, the pressure balancing component 15 is inserted into the top plate of the adapter 13, and the pressure balancing component 15 is a hydrophobic PTFE filter.

[0033] It should be noted that the sealing ring 17 (made of acid-resistant materials such as fluororubber) is crucial for ensuring a tight seal between the adapter 13 and the reagent bottle 6, preventing acid vapors from escaping from the interface during liquid addition or settling. The liquid guide tube 14 extends to the bottom of the reagent bottle 6, ensuring that the reagent inside the bottle can be drawn up as completely as possible. The pressure balancing component 15 (hydrophobic PTFE filter) is inserted into the top of the adapter 13, and its function is critical: when the peristaltic pump 5 operates to draw liquid from the bottle, a negative pressure is generated inside the bottle, and external air enters the bottle through this filter to balance the pressure, ensuring smooth liquid outflow; at the same time, the hydrophobic properties of the PTFE filter allow air to pass through but effectively block acid mist (aerosol) from escaping, and also prevent particulate matter in the environment from entering the reagent bottle 6 and contaminating the reagent.

[0034] In this embodiment: the human-computer interaction module 7 is a color touch screen, which supports editing of acid addition program, one-click calling of common methods and query of operation records, and can store at least 50 sets of user-defined acid addition schemes.

[0035] It should be noted that the color touchscreen provides an intuitive and user-friendly graphical interface, lowering the learning and usage threshold of the equipment. The acid addition program editing function allows users to flexibly set parameters such as single-use volume, flow rate, and number of additions. The one-click recall of commonly used methods and the ability to store a large number of user-defined protocols are particularly suitable for batch sample processing scenarios requiring repeated adherence to fixed acid addition procedures. This reduces repetitive setup time, improves work efficiency, and promotes the standardization of experimental operations. The operation record query function provides data support for experimental process traceability and quality control.

[0036] In this embodiment: the safety protection unit includes a leakage detection sensor 18, an emergency stop button 19, and a splash guard 20. The leakage detection sensor 18 is installed at the bottom of the pump head of the peristaltic pump 5. The emergency stop button 19 is located on the top plate of the corrosion-resistant housing 1 and is located on one side of the human-machine interaction module 7. The splash guard 20 is made of PP material and is sleeved on the corrosion-resistant fluid pipeline 3 at the liquid outlet. Its shape is a cone with a gradually increasing outer diameter.

[0037] It should be noted that the leak detection sensor 18 (such as an optical or conductive sensor) is positioned at the bottom of the pump head, a critical location most susceptible to leaks due to pump tubing damage or loose connections. Upon detecting liquid, it immediately sends a signal to the main control module 2, triggering the pump to stop and activating an audible and visual alarm to prevent further leakage. The emergency stop button 19 is located in a prominent and easily accessible position, providing operators with a direct and rapid physical means of interruption in case of any unexpected situation, complying with laboratory equipment safety regulations. The conical splash guard 20 guides and blocks the flow of acid dripping liquid, preventing liquid from splashing out of the container due to rebound from the container wall or droplet splashing, protecting the work surface and the user.

[0038] Specifically: The leakage detection sensor 18 is connected to the I / O port of the main control module 2. The main control module 2 monitors its signal in real time. When the signal status indicates that liquid has been detected, it immediately stops sending control pulses to the drive unit 4 and controls the human-machine interface module 7 to display alarm information and emit an alarm sound.

[0039] As attached Figure 1 , 2 As shown in Figure 5: Example 2: In this embodiment, a weighing tray 21 is also provided outside the corrosion-resistant outer shell 1. A weighing sensor 22 is embedded in the top of the weighing tray 21. The weighing sensor 22 is electrically connected to the main control module 2. The reagent bottle 6 is placed on the top of the weighing tray 21 after being connected to the adapter connector 13. The bottom of the weighing tray 21 is provided with a suction cup 23, and the top is provided with a surrounding ring 24 for limiting the position of the reagent bottle 6.

[0040] It should be noted that the weighing sensor 22, the weighing tray 21, and the main control module 2 together constitute the electronic liquid level monitoring system. By measuring the total weight of the reagent bottle 6 (including the bottle body, remaining reagent, and adapter 13) in real time and comparing it with the initial tare weight, the weight or volume of the remaining reagent can be accurately calculated, realizing real-time monitoring of the liquid level and low liquid level warning function, reminding the user to replace the reagent bottle 6 in time to avoid experimental interruption. The suction cup 23 at the bottom of the weighing tray 21 can be attached to the experimental table surface, increasing the stability of the placement and preventing the bottle from being accidentally knocked over. The surrounding ring 24 acts as a limit, ensuring that the reagent bottle 6 is placed in the center of the effective weighing area of ​​the weighing sensor 22, improving measurement accuracy, and also preventing the bottle from slipping.

[0041] Specifically: The weighing sensor 22 is connected to the main control module 2 via an analog-to-digital converter. The main control module 2 periodically reads the weight data, and the user can set the initial total weight (tare weight) or reagent density of the reagent bottle through the human-machine interaction module 7. The main control module 2 calculates the difference between the current total weight and the tare weight to determine the remaining reagent volume or mass, and issues a low-level warning through the human-machine interaction module 7 when the remaining amount is lower than a set threshold.

[0042] As attached Figure 1 , 2 As shown in Figure 6: Example 3: In this embodiment, a multi-bottle combination system is also included, comprising: A multi-channel fluid pipeline consists of a delivery tube 25 and at least two branch tubes 26. One end of the delivery tube 25 is connected to the inlet of the peristaltic pump 5, and the branch tubes 26 are used to connect at least two independent reagent bottles 6 respectively. The inlet tray 27 is sealed to the other end of the delivery pipe 25, and the branch pipes 26 are arranged in a ring and inserted into the inlet tray 27. One-way solenoid valves 28 are installed on each of the branch pipes 26. The one-way solenoid valves 28 are electrically connected to the main control module 2 and are controlled by the main control module 2 to selectively connect the liquid path of one of the reagent bottles 6 to the high-precision delivery module.

[0043] It should be noted that the multi-bottle system expands the equipment's functionality, enabling it to manage multiple different acids or multiple backup bottles of the same acid. The inlet tray 27, as the core component for fluid manifolding and distribution, features a ring-shaped plug-in design that facilitates the integrated arrangement of multiple pipelines. The one-way solenoid valve 28 on each branch pipeline is independently controlled by the main control module 2, selecting different reagent sources through valve opening and closing. This design allows for the automatic switching and addition of different types of acids according to a predetermined program within a single experimental procedure, meeting the needs of complex pretreatment processes such as the sequential addition of nitric acid, hydrofluoric acid, and hydrogen peroxide in microwave digestion, further enhancing the level of automation.

[0044] In this embodiment: the human-computer interaction module 7 provides a program editing interface for users to edit and store an addition sequence program containing multiple steps. Each step independently sets the target reagent bottle 6, the addition volume, and the addition flow rate. The main control module 2 is configured to: automatically control the opening of the one-way solenoid valve 28 of the corresponding step when executing the addition sequence program, and control the high-precision delivery module to add according to the set parameters. After the current step is completed, it automatically switches to the next sequential step.

[0045] It should be noted that this is the specific implementation of the multi-bottle combination function at the software control level. Users can intuitively program a multi-step addition sequence on the touchscreen, with each step associated with a specific reagent bottle channel 6 and addition parameters. The main control module 2, acting as the execution engine, will sequentially call these step instructions: first, open the solenoid valve of the corresponding channel, then start the peristaltic pump 5 to work according to the set parameters, and after completion, close the solenoid valve and automatically proceed to the next step. This programmed control method simplifies the complex polyacid addition process into a one-time setup and automatic operation, reducing manual intervention and operational errors, and improving the repeatability and reliability of complex experiments.

[0046] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A convenient automatic acid dispenser for laboratories, characterized in that, include: Corrosion-resistant outer casing (1); The main control module (2) is located inside the corrosion-resistant outer shell (1); A high-precision delivery module is located inside the corrosion-resistant housing (1) and connected to the corrosion-resistant liquid storage system through a corrosion-resistant fluid pipeline (3). The high-precision delivery module includes a drive unit (4) and a peristaltic pump (5) driven by the drive unit (4). The corrosion-resistant liquid storage system is provided with an interface for direct fitting and sealing connection of reagent bottle (6); The human-computer interaction module (7) is disposed on the surface of the corrosion-resistant shell (1); And a safety protection unit, which is provided on the corrosion-resistant outer shell (1); The main control module (2) is electrically connected to the drive unit (4), the human-machine interaction module (7) and the safety protection unit respectively, and is used to receive user instructions, control the programmed operation of the drive unit (4), process sensor signals and coordinate the work of each module; Under the control of the main control module (2), the drive unit (4) drives the peristaltic pump (5) to accurately deliver the acidic reagent from the corrosion-resistant storage system to the outlet at a set volume and flow rate. The human-computer interaction module (7) is used for users to set acid addition parameters, call preset programs and display the equipment operating status in real time; The safety protection unit is used to monitor potential hazards and perform safety protection actions during equipment operation.

2. The convenient automatic acid dispenser for laboratories according to claim 1, characterized in that, The peristaltic pump (5) adopts a double roller structure and is fitted with a Teflon pump tube inside. The top of the corrosion-resistant housing (1) is provided with an opening. The drive unit (4) is installed at the bottom of the peristaltic pump (5) and extends into the interior of the corrosion-resistant housing (1) through the opening. The outer wall of the peristaltic pump (5) is provided with a mounting plate (8). The mounting plate (8) is fixed to the top plate of the corrosion-resistant housing (1) by locking parts (9) provided around it.

3. The convenient automatic acid dispenser for laboratories according to claim 1, characterized in that, The corrosion-resistant outer shell (1) has a partition (10) inside. The main control module (2) is installed on the top of the partition (10). The bottom of the partition (10) is provided with a power supply module (11) that supplies power to the drive unit (4) and each module. The top of the partition (10) is also provided with a wireless transmission module (12) that is electrically connected to the main control module (2).

4. A convenient automatic acid dispenser for laboratories according to claim 1, characterized in that, The corrosion-resistant liquid storage system includes an adapter (13), a liquid guide tube (14), and a pressure balancing component (15). The adapter (13) is sealed to the end of the corrosion-resistant fluid pipeline (3) away from the peristaltic pump (5). The longitudinal section of the adapter (13) is a hollow convex shape, and its bottom large diameter section is provided with a threaded part (16). The threaded part (16) is threaded to the mouth of the reagent bottle (6). The adapter (13) is compatible with the reagent bottles (6) of standard specifications of 500mL, 1L, and 2.5L.

5. A convenient automatic acid dispenser for laboratories according to claim 4, characterized in that, The bottom of the adapter (13) is provided with a sealing ring (17), the bottom of the sealing ring (17) is in contact with the top of the reagent bottle (6), the liquid guide tube (14) is fixedly installed on the adapter (13) and connected to the corrosion resistant fluid pipeline (3), the pressure balance component (15) is inserted into the top plate of the adapter (13), and the pressure balance component (15) is a hydrophobic PTFE filter.

6. A convenient automatic acid dispenser for laboratories according to claim 1, characterized in that, The human-computer interaction module (7) is a color touch screen that supports editing of acid addition programs, one-click calling of common methods and query of operation records. It can store at least 50 sets of user-defined acid addition schemes.

7. A convenient automatic acid dispenser for laboratories according to claim 1, characterized in that, The safety protection unit includes a leakage detection sensor (18), an emergency stop button (19), and a splash guard (20). The leakage detection sensor (18) is installed at the bottom of the pump head of the peristaltic pump (5). The emergency stop button (19) is located on the top plate of the corrosion-resistant housing (1) and on one side of the human-machine interaction module (7). The splash guard (20) is made of PP material and is fitted onto the corrosion-resistant fluid pipeline (3) at the liquid outlet. Its shape is a cone with a gradually increasing outer diameter.

8. A convenient automatic acid dispenser for laboratories according to claim 1, characterized in that, It also includes a weighing tray (21) located outside the corrosion-resistant outer shell (1). A weighing sensor (22) is embedded in the top of the weighing tray (21). The weighing sensor (22) is electrically connected to the main control module (2). The reagent bottle (6) is connected to the adapter (13) and placed on the top of the weighing tray (21). The bottom of the weighing tray (21) is provided with a suction cup (23), and the top is provided with a surrounding ring (24) for limiting the reagent bottle (6).

9. A convenient automatic acid dispenser for laboratories according to claim 1, characterized in that, It also includes a multi-bottle system, which includes: The multi-channel fluid pipeline consists of a delivery tube (25) and at least two branch tubes (26). One end of the delivery tube (25) is connected to the inlet of the peristaltic pump (5), and the branch tubes (26) are used to connect at least two independent reagent bottles (6) respectively. The inlet tray (27) is sealed at the other end of the delivery pipe (25), and the branch pipe (26) is distributed in a ring and inserted into the inlet tray (27). One-way solenoid valves (28) are installed on each of the branch pipes (26). The one-way solenoid valves (28) are electrically connected to the main control module (2) and are controlled by the main control module (2) to selectively connect the liquid path of one of the reagent bottles (6) to the high-precision delivery module.

10. The convenient automatic acid dispenser for laboratories according to claim 9, characterized in that, The human-computer interaction module (7) provides a program editing interface for users to edit and store an addition sequence program containing multiple steps. Each step independently sets the target reagent bottle (6), addition volume, and addition flow rate. The main control module (2) is configured to automatically control the opening of the one-way solenoid valve (28) of the corresponding step when executing the addition sequence program, and control the high-precision delivery module to add according to the set parameters. After the current step is completed, it automatically switches to the next sequential step.

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