Rural high-precision liquid medicine concentration automatic configuration device

Abstract

The utility model discloses a kind of rural high-precision liquid medicine concentration automatic configuration equipment, belong to water treatment reagent dosing equipment technical field.The equipment aims at the problems such as rural small waterworks traditional reagent dosing equipment being easily adhered by reagent, poor measurement accuracy, complex operation and high cost, accurate dosing is realized by modular design: including dosing module consisting of dosing machine, medicine storage pipe, moisture-proof cover and feed inlet, medicine storage pipe can be arranged horizontally or vertically, horizontal arrangement is pushed by push rod, vertical arrangement is dropped by gravity, cooperate with moisture-proof cover linkage opening and closing to realize reagent moisture-proof storage and accurate delivery;Dissolution module consisting of dissolving barrel, agitator, liquid level detection component and overflow component realizes constant volume mixing of reagent and solvent;Fluid control module consisting of filter component, valve and pipeline guarantees solvent cleaning and residual liquid discharge;Liquid medicine output module consisting of main and standby metering pump parallel connection ensures delivery continuity.Each module is linked by control signal, avoids reagent adhesion influence from structure, improves dosing accuracy, simplifies operation and maintenance, reduces equipment cost, adapts to the actual demand of rural small waterworks "reducing cost, improving efficiency, easy operation and maintenance".

Description

Technical Field

[0001] This utility model belongs to the technical field of water treatment chemical dosing equipment, specifically relating to a high-precision automatic chemical concentration mixing device for rural areas. It is suitable for small-scale water treatment scenarios such as village-level water supply stations and township water plants, and solves the problems of inaccurate metering, complex operation, and high cost caused by chemical adhesion in traditional equipment. Background Technology

[0002] Rural small-scale water plants add various chemicals during water treatment, such as PAC, potassium permanganate, and activated carbon. The accuracy of chemical dosing directly affects the water quality compliance rate. However, existing dosing equipment suffers from the following core contradictions: Chemical Adhesion and Equipment Wear: Commonly used water treatment chemicals (such as polyaluminum chloride PAC and permanganate) are prone to moisture absorption and clumping and are corrosive. Traditional metering equipment is expensive and the conveying components are easily blocked by adhesion, resulting in inaccurate metering or even failure to meter, and shortening the life of the equipment. Meanwhile, the cost of anti-adhesion high-precision equipment far exceeds the budget of small rural water plants. The complexity of operation is not matched with the ability of personnel: Traditional equipment requires the control of multiple parameters, and the adhesion of chemicals increases the difficulty of cleaning. Most of the staff in small rural water plants are part-time, resulting in a high rate of operational deviation and large fluctuations in the concentration of chemicals (more than ±5%). The contradiction between automation needs and maintenance costs: Traditional automation systems rely on complex sensors and algorithms, which are expensive to purchase and maintain. Small rural water plants cannot afford this due to limited budgets and have long relied on manual dosing, resulting in poor water quality stability. Existing technologies have not addressed the collaborative requirements of "anti-adhesion, simple operation, and low cost" from the structural design level. This utility model avoids the above problems at the root by innovating a modular structure. Summary of the Invention

[0003] The purpose of this invention is to provide a quantitative block water treatment agent intelligent dosing device adapted to small rural water plants, in order to solve the problems existing in the prior art, achieve precise control of agent dosing and simplify operation, reduce equipment costs and maintenance difficulties, thereby improving the water treatment efficiency and water quality stability of small rural water plants. To achieve the above objectives, this utility model provides the following solution: This utility model provides an intelligent dosing device for water treatment agents, either in pre-formed blocks or in soluble packaging, suitable for small rural water plants. The pre-formed blocks are pre-made to a specific weight, while the soluble packaging contains a pre-formed amount of the agent to be added. The device includes a dosing module, a dissolving module, a fluid control module, a liquid output module, and a control linkage unit. The dosing module includes a dosing machine connected to the outlet of a storage pipe. A moisture-proof cover is provided between the outlet and inlet of the storage pipe, and the inlet is connected to a dissolving tank. The dissolving module includes a dissolving tank with a built-in stirrer, a liquid level detection component, and an overflow component. The fluid control module includes a solvent input pipeline connected sequentially to a filter component, a manual control valve, and an automatic control valve, as well as a drain pipeline connecting the bottom of the dissolving tank to a drain outlet. The liquid output module includes a main delivery pump and a backup delivery pump connected in parallel. All modules are linked and controlled by control signals. Preferably, the drug storage tube is arranged vertically or horizontally. When arranged vertically, the drug is delivered by gravity falling naturally. When arranged horizontally, the drug is delivered horizontally by pushing it with a drug delivery machine. The material is corrosion-resistant and meets food contact standards (such as PP, PE, etc.). The internal storage is a quantitative block of drug or a soluble drug packet in the outer packaging. The drug is pushed by the drug delivery machine through the moisture-proof cover and the inlet into the dissolving tank.

[0004] Preferably, the drug delivery device adopts a "push rod type + slot positioning" mechanical structure. The push rod stroke is precise and controllable and pushes one quantitative drug block at a time. It has a built-in non-contact photoelectric beam sensor for real-time counting of the dosage. The counting signal is fed back to the control unit to realize dosage calibration. Preferably, the moisture-proof cover includes a cover plate and a sealing structure (such as a food-grade silicone sealing ring), which remains closed under normal conditions to isolate external moisture. Its opening and closing action is linked to the pushing action of the drug delivery machine, and it only opens briefly when the drug passes through and closes immediately after the drug passes through. Preferably, the feed inlet is equipped with a funnel-shaped guide structure (the diameter of which gradually increases to 1.5 to 2 times the diameter of the drug block), which can guide the drug to fall vertically into the dissolving tank and avoid solvent splashing that could cause the drug block to break or stick to the tank wall.

[0005] Preferably, the dissolving tank is made of corrosion-resistant material (such as PE, stainless steel, etc.), and the bottom is designed with an incline (slope of 10° / 20°) to facilitate the drainage of residual liquid through the drain pipe. The agitator supports stepless speed regulation (50 / 300r / min), operating at a low speed of 50 / 100r / min during the reagent addition stage and at a high speed of 200 / 300r / min during the dissolving stage. Preferably, the liquid level detection component is an electrode-type liquid level gauge or a float-type liquid level gauge, which is connected to the solenoid valve as an automatic control valve via a signal to realize solvent volume control (volume error ≤ ±1%), and the height of the drain outlet of the overflow component is not lower than the preset maximum volume liquid level of the dissolving tank. Preferably, the filter element is a Y-type filter with a built-in 50-100 mesh filter screen, and the manual control valve and the drain control valve are both ball valves that can be manually opened and closed. During draining, the agitator can run at low speed to assist in flushing the inner wall of the dissolving tank. Preferably, both the main delivery pump and the standby delivery pump are metering pumps, and they are automatically switched in case of failure through a control unit. When the outlet pressure of the main delivery pump is lower than the set value for 10 seconds, the standby delivery pump starts immediately to ensure the continuity of drug delivery. Preferably, the control unit integrates a microprocessor and a signal interface, which can calculate the dosage based on the target drug concentration parameters, drive the collaborative work of each module according to the process of "solvent volume adjustment - drug block addition - dissolution and stirring - drug delivery - sewage discharge and maintenance", and reserves a sensor expansion interface for future automation upgrades.

[0006] The present invention achieves the following technical advantages over the prior art: This invention solves the problem of drug adhesion in traditional equipment from a structural perspective through modular closed-loop design and component linkage control. It achieves precise dosing with a concentration error of ≤±3% by using a rigid ratio of quantitative block drug and volumetric dissolution, and the equipment does not have complex and expensive equipment such as weighing sensors. The operation of the device is simplified to a minimal process of "replenishing the chemical block + inputting parameters," which can be mastered by part-time personnel after simple training. Furthermore, the procurement cost is only 1 / 5 to 1 / 3 of that of traditional systems, and annual maintenance costs are reduced by more than 80%. The parallel design of the main and backup pumps and the overflow protection mechanism ensure the reliability of the equipment, making it suitable for the actual needs of small rural water plants for "cost reduction, efficiency improvement, and easy operation and maintenance," effectively improving water quality compliance rates and production stability. Furthermore, it exhibits significant anti-adhesion performance: through the structural design of quantitative block-shaped agents, moisture-proof covers (normally sealed to prevent moisture absorption), push rod feeding (no residual contact), and a tilted bottom of the dissolving tank (easy to clean), agent adhesion is reduced at the source, extending the equipment life by 2 to 3 times. Furthermore, the dosing accuracy is stable: the rigid ratio of quantitative drug blocks (effective ingredient error ≤ ±2%) and constant volume dissolution (volume error ≤ ±1%), combined with photoelectric counting calibration, achieves a drug concentration error of ≤ ±3%, meeting the water quality standards of small rural water plants. Furthermore, operation and maintenance are simple: workers only need to "replenish the drug block to the storage pipe and input the target parameters", without complicated debugging; the sewage pipeline and stirring linkage design reduce the difficulty of cleaning, and part-time personnel can be competent after simple training. Furthermore, it boasts significant cost advantages: by eliminating expensive metering equipment, the equipment procurement cost is only 1 / 5 to 1 / 3 of that of traditional systems; with no complex and easily damaged parts, annual maintenance costs are reduced by more than 80%, making it suitable for the budgets of small rural water plants. Furthermore, it boasts strong reliability and scalability: the parallel operation of the main and backup pumps ensures continuous delivery, and overflow protection prevents equipment damage; the control unit has reserved interfaces, and future upgrades to full automation only require the expansion of sensors, resulting in low cost (in the thousands of yuan range) and high compatibility. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the embodiments will be briefly introduced below. Figure 1 is a schematic diagram of the horizontal drug delivery structure of this utility model; Figure 2 is a schematic diagram of the vertical drug-pushing structure of this utility model; In the diagram: 1. Drug dispenser; 2-1 Horizontal drug storage pipe; 2-2 Vertical drug storage pipe; 3. Drug block; 4. Moisture-proof cover; 5. Feed inlet; 6. Stirrer; 7. Dissolving tank; 8. Electrode level gauge; 9. Overflow component; 10. Solenoid valve; 11. Manual ball valve on the clean water side; 12. Y-type filter; 13. Clean water; 14. Manual ball valve on the wastewater side; 15. Drain outlet; 16. Main delivery pump (metering pump); 17. Standby delivery pump (standby metering pump). Detailed Implementation

[0008] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Operation process of high-precision automatic drug concentration preparation equipment in rural areas Example 1

[0009] I. Initial Preparation Phase (Pill Loading and System Readiness) Dosage replenishment and moisture-proof storage Drug characteristics: The drug is produced using pre-mixed, quantitative block form through a process of "raw material premixing - molding - weight sorting." Each block weighs 100g ± 2g, with an active ingredient content of 90% ± 1%. The surface is smooth to reduce adhesion. It is in cylindrical form with a diameter of 50mm, suitable for use with medication dispensers. Alternatively, it can be packaged in a dissolvable pouch, with a pre-quantified dose inside; the pouch dissolves upon contact with a solvent. Filling operation: Maintenance personnel replenish the drug block or drug bag into the drug storage tube (food-grade PP material, 1500mm long, 60mm inner diameter, 12° inclined arrangement), and the drug is in the delivery area of ​​the drug dispenser; after filling, the moisture-proof cover automatically closes, and a seal is formed by the food-grade silicone sealing ring (sealing pressure 0.12MPa) to isolate external moisture, prevent the drug from absorbing moisture and clumping, and adapt to the continuous or intermittent treatment rhythm of the water plant.

[0010] Component status self-check: The control unit automatically detects the status of each module: the moisture cover is closed in place (feedback from the magnetic proximity switch), the manual ball valve on the clean water side is open, the main delivery pump and the standby delivery pump are in standby mode, and the level gauge has no abnormal signal. After confirming that there is no fault, it enters the "ready" state. II. Solvent Volume Adjustment Stage (Water Filtration and Precise Water Replenishment) Filter pathway activation and impurity interception Triggering logic: The control unit triggers the solvent volume adjustment process according to a preset cycle (or upon receiving a manual start command). Clean water filtration path: Clean water passes sequentially through a Y-type filter (built-in 50-mesh stainless steel filter screen, filtration area 150cm², intercepting impurities such as silt and rust ≥0.3mm, pressure loss ≤0.07MPa) → clean water side manual ball valve (DN25 brass ball valve, fully open) → solenoid valve (DC24V direct-acting type, response time ≤0.8 seconds to open), and enters the dissolving tank. Liquid level closed-loop control and safety redundancy Precise water replenishment: The electrode-type level gauge (measuring range 0 / 1000mm, accuracy ±1mm) monitors the liquid level in real time. When the preset value of 300L is reached, it outputs a 4 / 20mA signal to the control unit, which immediately commands the solenoid valve to close and stop water replenishment (volume error ≤±1%, i.e. 297~303L).

[0011] Over-level protection: If the solenoid valve malfunctions and causes continuous water replenishment, when the liquid level exceeds the maximum working level of 900mm, the overflow pipe (DN50 PVC-U pipe, installation height 950mm) will automatically drain the liquid. The end of the overflow pipe is equipped with a U-shaped water seal (height 100mm) to prevent odor backflow and ensure that the dissolving tank is not overfilled. III. Drug Dosing Stage (Precise Delivery and Count Calibration) The dosage calculation and linkage execution formula "Drug quantity N = (Target concentration C × Solvent volume V) / Active ingredient content per dose K" is automatically calculated: N represents the quantity of medicine (blocks / packets). C represents the target drug concentration (mg / L). V is the solvent volume (L) K represents the content of the active ingredient in a single block / packet of medicine (mg / serving). Pushing sequence: The drug delivery machine starts the "stepper motor + ball screw" pusher system (pusher accuracy ±0.1mm), pushing one block of medicine or one packet of medicine at a time; 0.1 seconds before pushing, the moisture-proof cover receives the linkage signal and is driven by the DC24V cylinder to open (opening angle 90°, response time ≤0.3 seconds), and the medicine falls vertically into the dissolving tank through the feed port (flared mouth guide structure, lower diameter 60mm) to avoid solvent splashing. Count calibration and anomaly correction Real-time monitoring: The dispensing machine has a built-in through-beam photoelectric sensor (detection distance 50mm, response time ≤0.1ms). Each dose of medicine is triggered to count, and the signal is fed back to the control unit in real time. Deviation correction: If the actual count deviates from the theoretical value by more than 2 parts, the control unit will immediately drive the dispensing machine to replenish the corresponding quantity; if the push is stuck for 3 consecutive times (the push rod encounters resistance ≥200N), an audible and visual alarm will be triggered and the fault code "E01" will be displayed. IV. Dissolving and Stirring Stage (Speed ​​Mixing and Homogenization Assurance) Staged speed-adjusting mixing logic Dosing stage: During the dosing process, the agitator operates at a low speed of 60r / min (power 0.75kW), and the double-layer 304 stainless steel blades (diameter 300mm) form a weak vortex to prevent the agent from accumulating at the bottom of the tank. Dissolution stage: After the reagent is added, the stirrer automatically switches to high-speed stirring at 280r / min (power 1.5kW), with a blade tip linear velocity of 4.2m / s. Combined with the three guide ribs (50mm high) on the inner wall of the dissolution tank to enhance turbulence, the reagent is homogeneously dissolved within 35 minutes. V. Drug Delivery Stage (Precise Delivery and Redundancy Support) Main pump commissioning and flow control Dosing execution: The control unit commands the main delivery pump (mechanical diaphragm metering pump, flow range 5 / 50L / h, accuracy ±1%) to start, and delivers the liquid from the side wall outlet of the dissolving tank (50mm from the bottom inclined section to avoid residual liquid intake) to the water treatment dosing point at a preset flow rate of 5L / h, with the outlet pressure stabilizing at 0.3 / 0.5MPa. Fault switching and alarm response Standby pump linkage: The control unit monitors the main pump outlet pressure in real time through a pressure sensor (range 0~1.6MPa, accuracy ±0.5% FS). When the pressure is <0.2MPa and lasts for 3 seconds, the standby delivery pump is immediately triggered to start automatically (switching time ≤2.2 seconds), and an alarm message "Main pump failure, standby pump in operation" is displayed. VI. Sewage Discharge and Maintenance Phase (Residual Liquid Removal and Tank Cleaning) Sewage discharge triggering and channel switching Triggering conditions: The sewage discharge process will be automatically triggered after a single addition is completed, or after a cumulative 8 hours of operation, or when the agitator current rises abnormally (>1.5A). Pathway control: The control unit shuts down the main delivery pump / standby delivery pump and solenoid valve, and instructs the operator to open the manual ball valve (DN40 PVC ball valve) on the sewage discharge side. The 15° tilt design at the bottom of the dissolving tank guides the residual liquid to gather at the sewage discharge port, and the residual liquid is emptied within 3 minutes (emptying rate ≥99.3%). Barrel flushing and cleaning verification Linked cleaning: During the sewage discharge process, the control unit drives the agitator to run at a low speed of 70r / min for 5 minutes, which, together with the coating on the inner wall of the tank, washes away the residual liquid. The residual rate after cleaning is ≤1.4%. Complete reset: After the sewage discharge is completed, close the manual ball valve on the sewage discharge side. The system will automatically record the sewage discharge time and cleaning status, and return to the ready state to wait for the next round of dosing. Actual benefits: After the equipment was put into operation, the water plant's chemical dosing was normal, the equipment experienced almost no dosing failures, and the annual maintenance cost was reduced by 70%. Example 2: Vertically Dispensing Drug Storage Tube

[0012] As shown in Figure 2, another embodiment of this utility model is a vertical drug-feeding storage tube structure. The only difference from the main embodiment is the arrangement of the storage tube, as follows: The vertical storage tube is installed vertically, using the same food-grade PP material, with an inner diameter of 60mm. A gravity-feeding channel is configured in the height direction, and the drug block or drug bag falls naturally to the inlet by gravity. A mechanical one-way gate controls the feeding rhythm, and the gate opening time matches the size of the drug (the drug with a diameter of 50mm takes ≤0.5 seconds to pass through), which is adapted to the feeding characteristics of the vertical storage tube.

[0013] Through the disclosure of the above main embodiment (corresponding to Figure 1) and other embodiments (corresponding to Figure 2), this utility model, while maintaining the consistency of core modular design and intelligent linkage logic, achieves optimal adaptation in different scenarios through flexible selection of drug storage tube arrangement, further broadening the application scope of the equipment.

[0014] Through the above process, the equipment achieves a closed-loop control of "quantitative reagent addition - volumetric dissolution - precise output - automatic maintenance". The core logic realizes the design goals of "no adhesion interference, high-precision control, low-cost investment, and simple operation and maintenance", which is suitable for the actual needs of small rural water plants.

Claims

1. A high-precision automatic preparation device for medicinal liquid concentration in rural areas, characterized in that, include: The drug delivery module consists of a drug delivery machine, a drug storage tube, and a moisture-proof cover. The drug delivery machine is connected to the discharge end of the drug storage tube and is used to push a quantitative amount of blocky drug or a soluble drug packet in the outer packaging into the drug storage tube. The moisture-proof cover is located at the outlet of the drug storage tube and can be opened and closed in a controlled manner to isolate external moisture. Dissolving module: includes a dissolving tank, a feed inlet, a stirrer, a liquid level detection component, and an overflow component; the dissolving tank is used to contain solvent and mix and dissolve pharmaceutical agents; the feed inlet is used to add a quantitative amount of granular pharmaceutical agents or soluble pharmaceutical packets into the dissolving tank; the stirrer is installed inside the dissolving tank to stir the materials inside; the liquid level detection component is used to detect the solvent level in the dissolving tank; the overflow component is located at the top of the dissolving tank for draining liquid when the level exceeds the limit. Fluid control module: includes solvent input pipeline and drain pipeline; the solvent input pipeline is connected in sequence to filter component, manual control valve, and automatic control valve before entering the dissolving tank; the drain pipeline is connected to the bottom of the dissolving tank and the drain port through drain control valve; Medicine output module: includes a main delivery pump and a standby delivery pump connected in parallel, used to deliver the dissolved medicine to the outside.

2. The automatic rural high-precision medicine concentration preparation equipment according to claim 1, characterized in that: The drug storage tube can be arranged horizontally or vertically. When arranged horizontally, the drug is delivered horizontally by pushing it with a drug delivery machine. When arranged vertically, the drug is delivered by gravity falling naturally. The quantitative block drug or the soluble drug package in the drug storage tube is pushed by the drug delivery machine and falls into the dissolving tank through the moisture-proof cover and the feed inlet.

3. The automatic rural high-precision medicine concentration preparation equipment according to claim 1, characterized in that: The moisture-proof cover includes a cover plate and a sealing structure. The sealing structure can isolate external moisture when the cover plate is closed. The opening and closing of the moisture-proof cover is linked to the pushing action of the drug delivery machine or the feeding rhythm of the drug storage tube. It only opens when the drug passes through and closes immediately after the drug passes through.

4. The automatic rural high-precision medicine concentration preparation equipment according to claim 1, characterized in that: The dissolving tank is made of corrosion-resistant material, and its bottom is designed to be inclined to cooperate with the drain pipe to drain residual liquid; the speed of the stirrer is adjustable, which can prevent the agent from accumulating at a low speed during the agent addition stage and accelerate mixing at a high speed during the dissolving stage.

5. The automatic rural high-precision medicine concentration preparation equipment according to claim 1, characterized in that: The liquid level detection component is a float level gauge or an electrode level gauge; the automatic control valve is a solenoid valve, and the two are connected by a signal to achieve solvent volume control; the height of the drain outlet of the overflow component is not lower than the preset maximum volume liquid level of the dissolving tank.

6. The automatic rural high-precision medicine concentration preparation equipment according to claim 1, characterized in that: The filter element is a Y-type filter with a built-in 50-100 mesh filter screen. The manual control valve is a ball valve that can be manually opened and closed, used to cut off the solvent input during maintenance. The drain control valve is a ball valve that can be manually opened and closed. During draining, the agitator can run at low speed to assist in flushing the inner wall of the dissolving tank.

7. The automatic rural high-precision medicine concentration preparation equipment according to claim 1, characterized in that: Both the main delivery pump and the standby delivery pump are metering pumps with high metering accuracy. They can automatically switch in case of failure to ensure the continuity of drug delivery.

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