A constant-current micro-dosing device

Abstract

This utility model relates to the field of dosing device technology, specifically to a dosing device for constant flow micro-dosing, comprising a dosing device having a constant liquid level chamber and a reflux chamber connected in sequence. The left side surface of the dosing device has an inlet communicating with the constant liquid level chamber. The side wall of the constant liquid level chamber has an overflow port located at the top of the constant liquid level chamber and communicating with the reflux chamber. A secondary dosing device is detachably connected to the left side of the dosing device. The secondary dosing device has an additional chamber with the same structure as the constant liquid level chamber. The left side surface of the secondary dosing device has an additional port communicating with the additional chamber, and the right side surface of the secondary dosing device has a connecting port communicating with the additional chamber. The connecting port communicates with the inlet. The purpose of this utility model is to solve the problem of output pressure changes caused by liquid level fluctuations.

Description

Technical Field

[0001] This utility model relates to the field of drug dosing device technology, specifically a drug dosing device for constant flow micro-dosing. Background Technology

[0002] A micro-dosing device is a device used to precisely control the addition of small amounts of chemicals. It is widely used in scenarios requiring strict control of chemical concentration. It typically consists of a chemical storage component, a metering and dosing assembly, and a corresponding control unit. These components work together to achieve precise control of the dosage. During operation, the device can automatically adjust the dosing rate and dosage of the chemical based on preset parameters or real-time monitoring data to ensure that the chemical enters the target system. Whether it is chemical agents used for water purification in wastewater treatment, additives used to maintain reaction conditions in industrial production, or precisely proportioned solutions used in the medical field, the micro-dosing device can avoid waste caused by excessive dosage or insufficient dosage affecting the treatment effect due to its high-precision metering capability, thereby improving the stability and economy of the overall process.

[0003] In traditional systems, the liquid level of the drug solution changes frequently during consumption or replenishment. The liquid level directly affects the liquid output pressure, which in turn leads to unstable dosing flow. When the liquid level rises, the pressure increases, and when the liquid level falls, the pressure decreases. This flow fluctuation not only reduces the dosing accuracy but also interferes with the stability of subsequent processes. Utility Model Content

[0004] The purpose of this invention is to provide a constant flow micro-dosing device to solve the problem of output pressure changes caused by liquid level fluctuations.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A constant-flow micro-dosing device includes a dosing unit, which has a constant-level cavity and a reflux cavity connected in sequence. The left side surface of the dosing unit has an inlet communicating with the constant-level cavity. The side wall of the constant-level cavity has an overflow port located at the top of the constant-level cavity and communicating with the reflux cavity. A secondary dosing unit is detachably connected to the left side of the dosing unit. The secondary dosing unit has an auxiliary cavity with the same structure as the constant-level cavity. The left side surface of the secondary dosing unit has an auxiliary port communicating with the auxiliary cavity. The right side surface of the secondary dosing unit has a connecting port communicating with the auxiliary cavity and communicating with the inlet. The tops of the constant-level cavity and the auxiliary cavity are on the same horizontal line.

[0007] Preferably, both the dosing device and the auxiliary dosing device have protrusions fixedly connected to their left surfaces, and the auxiliary dosing device has a groove on its right surface for the protrusions to be embedded.

[0008] Preferably, a docking block is fixedly connected to the right side surface of the auxiliary medicine device, and a docking groove for the docking block to be embedded is provided on the left side surface of the medicine dispenser and the auxiliary medicine device.

[0009] Preferably, a locking disc is provided between the dosing device and the auxiliary dosing device, and the dosing device and the auxiliary dosing device are detachably connected to each other through the locking disc.

[0010] Preferably, the locking disc includes a disc head and an arc-shaped locking tongue, the arc-shaped locking tongue being coaxially and fixedly connected to the bottom end of the disc head, the left side surface of the auxiliary medicine device being provided with a secondary locking tongue groove for the entire arc-shaped locking tongue to be screwed into, and the left side surfaces of the medicine dispenser and the auxiliary medicine device being provided with a main locking tongue groove for a portion of the arc-shaped locking tongue to be screwed into, the main locking tongue groove and the secondary locking tongue groove being continuous arc-shaped segments.

[0011] Preferably, a torsion spring is fixedly connected between the auxiliary medicine device and the pan head, with one end of the torsion spring fixedly connected to the auxiliary medicine device and the other end fixedly connected to the bottom of the pan head.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The top of the constant liquid level chamber and the auxiliary chamber are kept at the same level. Combined with the overflow port design, when the liquid level reaches the overflow port height, the excess liquid automatically enters the return chamber, so that the liquid level in the chamber is always constant. The stable liquid level directly avoids the output pressure change caused by liquid level fluctuation, and ensures the stability of the dosing flow rate from the source.

[0014] 2. Modular expansion for flexible adaptation to different scenarios: The device adopts a modular design with detachable connections between the dosing unit and auxiliary dosing units. Through the precise matching of protrusions and grooves, docking blocks and docking slots, the number of auxiliary dosing units can be flexibly increased or decreased according to actual dosing needs. When only a small amount of liquid is needed, a single dosing unit can be used. When a larger capacity or multiple sets of simultaneous dosing are required, auxiliary dosing units can be added, and the design of the constant liquid level chamber and the top of the auxiliary chamber being on the same horizontal line ensures that the liquid level of each set of chambers is consistent. There is no need to replace the entire set of devices, which greatly improves the versatility and adaptability of the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the entire utility model;

[0017] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 This is a schematic diagram of the structure of the lock disc of this utility model;

[0019] Figure 5 This is a top sectional view of the entire utility model;

[0020] Figure 6 This utility model Figure 5 Enlarged view of point B in the middle;

[0021] Figure 7 This is a schematic diagram of the structure of the auxiliary medicine device of this utility model;

[0022] Figure 8 This utility model Figure 7 Enlarged view of point C in the middle;

[0023] Figure 9 This utility model Figure 7 Enlarged view of point D in the middle.

[0024] In the diagram: 1. Dosing device; 2. Connecting groove; 3. Connecting block; 4. Auxiliary dosing device; 5. Torsion spring; 6. Pan head; 7. Arc-shaped locking tongue; 8. Protrusion; 9. Groove; 10. Main locking tongue groove; 11. Auxiliary locking tongue groove; 12. Constant liquid level cavity; 13. Return cavity; 14. Additional cavity. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1 to 9 This utility model provides a technical solution.

[0027] A constant-flow micro-dosing device includes a dosing unit 1, which has a constant-level cavity 12 and a return cavity 13 connected in sequence. The left side surface of the dosing unit 1 has an inlet communicating with the constant-level cavity 12. The side wall of the constant-level cavity 12 has an overflow port located at the top of the constant-level cavity 12 and communicating with the return cavity 13. A secondary dosing unit 4 is detachably connected to the left side of the dosing unit 1. Multiple secondary dosing units 4 can be detachably connected to each other. Each secondary dosing unit 4 has an auxiliary cavity 14, which has the same structure as the constant-level cavity 12. The auxiliary medicine device 4 has an additional port on its left side surface that communicates with the auxiliary cavity 14, and a connecting port on its right side surface that communicates with the auxiliary cavity 14. The connecting port is connected to the liquid inlet. The top of the constant liquid level cavity 12 and the auxiliary cavity 14 are on the same horizontal line. When only the dosing device 1 is used, the medicine is added into the cavity of the dosing device 1 through the liquid inlet. When the dosing device 1 and the auxiliary medicine device 4 are connected to each other, the connecting port will communicate with the liquid inlet. The top of the constant liquid level cavity 12 and the auxiliary cavity 14 are on the same horizontal line, that is, the liquid level is constant, and the medicine is added into the dosing device 1 and the auxiliary medicine device 4 through the additional port.

[0028] Both the dosing device 1 and the auxiliary dosing device 4 have protrusions 8 fixedly connected to their left surfaces. The auxiliary dosing device 4 has a groove 9 for the protrusions 8 to be embedded in its right surface. The auxiliary dosing device 4 has a docking block 3 fixedly connected to its right surface. The dosing device 1 and the auxiliary dosing device 4 have docking slots 2 for the docking block 3 to be embedded in their left surfaces, which facilitates docking between the dosing device 1 and the auxiliary dosing device 4.

[0029] A locking disc is provided between the dosing device 1 and the auxiliary dosing device 4, and the dosing device 1 and the auxiliary dosing device 4 are detachably connected to each other through the locking disc.

[0030] The locking disc includes a disc head 6 and an arc-shaped locking tongue 7. The arc-shaped locking tongue 7 is coaxially fixedly connected to the bottom end of the disc head 6. The left side surface of the auxiliary medicine device 4 is provided with an auxiliary locking tongue groove 11 for the entire arc-shaped locking tongue 7 to be screwed in. The left side surfaces of the medicine dispenser 1 and the auxiliary medicine device 4 are provided with a main locking tongue groove 10 for the part of the arc-shaped locking tongue 7 to be screwed in. The main locking tongue groove 10 and the auxiliary locking tongue groove 11 are continuous arc-shaped segments. When the entire arc-shaped locking tongue 7 is located in the auxiliary locking tongue groove 11, the medicine dispenser 1 and the auxiliary medicine device 4 are disconnected. When the arc-shaped locking tongue 7 is partially screwed into the main locking tongue groove 10, that is, a part is located in the main locking tongue groove 10 and the other part is located in the auxiliary locking tongue groove 11, the medicine dispenser 1 and the auxiliary medicine device 4 are connected to each other because the arc-shaped locking tongue 7 is arc-shaped.

[0031] The dosing device 1 and the auxiliary dosing device 4 are connected by the arc-shaped locking tongue 7 for positioning. If necessary, the dosing device 1 and the auxiliary dosing device 4 can be further connected with bolts to further strengthen the connection. This is the conventional assembly method, as shown in the figure. Conventionally, sealing rings are assembled at the interconnected openings of the dosing device. This is not shown in the figure and is a technique well known to those skilled in the art, so it is not limited here.

[0032] A torsion spring 5 is fixedly connected between the auxiliary medicine dispenser 4 and the pan head 6. One end of the torsion spring 5 is fixedly connected to the auxiliary medicine dispenser 4, and the other end is fixedly connected to the bottom of the pan head 6. The torsion spring 5 causes the locking disc to tend to rotate toward the main locking tongue groove 10. Specifically, the torsion spring 5 causes the arc-shaped locking tongue 7 to be partially screwed into the main locking tongue groove 10. When the locking disc is rotated so that the arc-shaped locking tongue 7 is fully screwed into the auxiliary locking tongue groove 11, the torsion spring 5 will store elastic potential energy. After the locking disc is released, the locking disc will automatically reset and rotate toward the main locking tongue groove 10 under the elastic force of the torsion spring 5. This helps to prevent the situation where the entire arc-shaped locking tongue 7 is screwed into the auxiliary locking tongue groove 11 without human control, causing the medicine dispenser 1 and the auxiliary medicine dispenser 4 to disconnect.

[0033] It also includes a reagent bottle (not shown in the figure), which has an outlet and a reflux port. The outlet is connected to the inlet of the peristaltic pump through a third conduit. The top of the reagent bottle is also equipped with a replenishment port for replenishing the drug solution.

[0034] The peristaltic pump outlet is connected to the inlet on the left side of the constant liquid level chamber 12 via a first conduit. The bottom of the dosing device 1 is provided with a first output port that communicates with the constant liquid level chamber 12. The bottom of the dosing device 1 is provided with a second output port that communicates with the reflux chamber 13. The second output port is connected back to the reflux port of the reagent bottle via a second conduit to form a closed loop reflux. Each auxiliary dosing device 4 is provided with an additional output port that communicates with the auxiliary chamber 14 at its bottom. The reagent bottle and peristaltic pump can be adapted to the existing technology, and the pipeline connection method also adopts the conventional connection method, which does not involve innovative improvements and is not limited here.

[0035] The specific steps are as follows: First, close the second output port. Then, pump the reagent from the reagent bottle into the constant level chamber 12 of the dosing device 1 via a peristaltic pump. When the liquid level in the constant level chamber 12 reaches the overflow height, excess reagent will enter the reflux chamber 13. Then, open the second output port and allow the reagent to flow back to the reagent bottle via the second conduit. The reagent from the reagent bottle can then be continuously pumped into the constant level chamber 12 of the dosing device 1 via the peristaltic pump. Excess reagent will enter the reflux chamber 13 and flow back into the reagent bottle, forming a closed-loop reflux, thus maintaining a constant liquid level in the constant level chamber 12. To eliminate the influence of liquid level fluctuations on output pressure, when the dosing device 1 and the auxiliary device 4 are connected, the operation is the same except that the liquid is added to the chambers of the dosing device 1 and the auxiliary device 4 through the auxiliary port. The output can be adjusted by changing the capillary tube with different inner diameter and length. The output damping is inversely proportional to the fourth power of the inner diameter and directly proportional to the length, so as to achieve continuous and stable output of micro-level reagents. The output can be adjusted by damping, eliminating the need for frequent calibration of pump parameters. The operation is simple and the damping parameters (inner diameter and length) can be quantified, which makes it easy to accurately reproduce the set flow rate.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A constant-flow micro-dosing device, comprising a dosing device (1), characterized in that: The dosing device (1) has a constant liquid level chamber (12) and a reflux chamber (13) connected in sequence. An inlet communicating with the constant liquid level chamber (12) is provided on the left side surface of the dosing device (1). An overflow port is provided on the side wall of the constant liquid level chamber (12), located at the top of the constant liquid level chamber (12) and communicating with the reflux chamber (13). A secondary dosing device (4) is detachably connected to the left side of the dosing device (1). An auxiliary cavity (14) is provided inside the medicine container (4). The auxiliary cavity (14) has the same structure as the constant liquid level cavity (12). An auxiliary port communicating with the auxiliary cavity (14) is provided on the left side surface of the auxiliary medicine container (4). An interface communicating with the auxiliary cavity (14) is provided on the right side surface of the auxiliary medicine container (4). The interface is connected to the liquid inlet. The tops of the constant liquid level cavity (12) and the auxiliary cavity (14) are on the same horizontal line.

2. The dosing device for constant flow micro-dosing according to claim 1, characterized in that, Both the dosing device (1) and the auxiliary dosing device (4) have protrusions (8) fixedly connected to their left surfaces, and the auxiliary dosing device (4) has a groove (9) for the protrusions (8) to be embedded in its right surface.

3. The dosing device for constant flow micro-dosing according to claim 1, characterized in that, The right side surface of the auxiliary medicine device (4) is fixedly connected to a docking block (3), and the left side surface of the medicine dispenser (1) and the auxiliary medicine device (4) are provided with a docking groove (2) for the docking block (3) to be inserted.

4. The dosing device for constant flow micro-dosing according to claim 1, characterized in that, A locking disc is provided between the dosing device (1) and the auxiliary dosing device (4), and the dosing device (1) and the auxiliary dosing device (4) are detachably connected to each other through the locking disc.

5. The dosing device for constant flow micro-dosing according to claim 4, characterized in that, The locking disc includes a disc head (6) and an arc-shaped locking tongue (7). The arc-shaped locking tongue (7) is coaxially fixedly connected to the bottom end of the disc head (6). The left side surface of the auxiliary medicine device (4) is provided with an auxiliary locking tongue groove (11) for the entire arc-shaped locking tongue (7) to be screwed in. The left side surfaces of the medicine dispenser (1) and the auxiliary medicine device (4) are provided with a main locking tongue groove (10) for the part of the arc-shaped locking tongue (7) to be screwed in. The main locking tongue groove (10) and the auxiliary locking tongue groove (11) are continuous arc-shaped segments.

6. The dosing device for constant flow micro-dosing according to claim 5, characterized in that, A torsion spring (5) is fixedly connected between the auxiliary medicine device (4) and the pan head (6). One end of the torsion spring (5) is fixedly connected to the auxiliary medicine device (4), and the other end is fixedly connected to the bottom of the pan head (6).

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