A dispensing system

Abstract

The utility model provides a kind of dispensing system, including medicament storage tank, screw feeder, medicine tank, water inlet device, drug delivery pipeline and PLC controller, the discharge outlet of screw feeder is connected with the feed inlet pipeline of medicine tank, water inlet device is connected with medicine tank water inlet by first pipeline, drug delivery pipeline is connected with the discharge outlet of medicine tank, water inlet device is connected with drug delivery pipeline by second pipeline, first control valve is equipped on second pipeline, second control valve and third control valve are respectively set on drug delivery pipeline, second control valve and third control valve are respectively located at the two ends of second pipeline and drug delivery pipeline connection point, first control valve second control valve and third control valve are respectively connected with PLC controller signal. The switch of each control valve is controlled by PLC controller timing, can be positive wash reverse wash cooperation to flush away the crystallization in drug delivery pipeline, prevent crystallization from blocking pipeline.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, specifically to a dosing system. Background Technology

[0002] Polyferric sulfate (PFS) is a highly efficient inorganic polymeric flocculant widely used in the coagulation process of water treatment. However, in practical applications, sedimentation easily occurs during the preparation and addition of PFS solutions. If insufficient stirring is performed during the dilution and dissolution process of PFS powder or liquid, hydrolysis reactions can easily occur, producing ferric hydroxide colloids or precipitates. These substances deposit on the bottom of the tank and the pipe walls. The sediments, as well as crystals formed in low-flow-rate pipe sections (such as pump outlets, valves, and elbows), gradually lead to blockage of the dosing pipeline. Maintenance personnel need to frequently perform manual flushing, disassembly, and unblocking, resulting in a huge workload and affecting the continuity and stability of the water treatment process. Currently, simple mechanical stirring and manual flushing are commonly used, which cannot fundamentally solve the problems of uneven dissolution and pipeline sedimentation and blockage. Therefore, existing technologies need further development. Utility Model Content

[0003] This utility model provides a drug dispensing system, the specific implementation of which is as follows: A drug dispensing system includes a drug storage tank, a screw feeder, a dissolving tank, a water inlet device, a drug delivery pipeline, and a PLC controller. The outlet of the drug storage tank is connected to the inlet pipeline of the screw feeder, and the outlet of the screw feeder is connected to the inlet pipeline of the dissolving tank. The water inlet device is connected to the water inlet of the dissolving tank via a first pipeline. The drug delivery pipeline is connected to the outlet of the dissolving tank. The water inlet device is connected to the drug delivery pipeline via a second pipeline. A first control valve is provided on the second pipeline. A second control valve and a third control valve are respectively provided on the drug delivery pipeline. The second and third control valves are located at opposite ends of the connection point between the second pipeline and the drug delivery pipeline. The first, second, and third control valves are respectively connected to the PLC controller via signals.

[0004] Furthermore, the dissolving tank has an aeration device, which includes an aeration pipe located inside the dissolving tank and an aeration source that provides gas to the aeration pipe. An aeration port is provided on the side wall of the dissolving tank. One end of the aeration port is connected to the aeration pipe, and the other end of the aeration port is connected to the aeration source through a pipeline.

[0005] Furthermore, the aeration pipe has holes in its wall so that the gas inside the aeration pipe can be released into the dissolving tank through the holes.

[0006] Furthermore, there are multiple holes, and the outlet direction of the multiple holes is towards the top of the dissolving vessel.

[0007] Furthermore, the dissolving tank is equipped with a stirring device.

[0008] Furthermore, the screw feeder is a variable frequency speed control type screw feeder, which has a frequency converter.

[0009] Furthermore, the frequency converter of the screw feeder is connected to the PLC controller via signal; a fourth control valve is installed on the first pipeline, and the fourth control valve is connected to the PLC controller via signal.

[0010] Furthermore, a drug delivery pump is installed on the drug delivery pipeline.

[0011] Beneficial effects: 1. The second pipeline of this utility model is equipped with a first control valve, and the drug delivery pipeline is equipped with a second control valve and a third control valve. When the precipitate is deposited on the pipe wall and crystals are formed, the PLC controller controls the opening and closing of each control valve at regular intervals. When the first control valve and the second control valve are open, the third control valve closes the backwashing drug delivery pipeline; when the first control valve and the third control valve are open, the second control valve closes the forward washing drug delivery pipeline. The forward washing and backwashing work together to flush away the crystals in the drug delivery pipeline with water, preventing the crystals from clogging the pipeline and avoiding the need for maintenance personnel to frequently disassemble the pipeline for manual flushing.

[0012] 2. The dissolving tank of this utility model is equipped with an aeration pipe with holes inside. When the gas rushes out from the holes, it will generate an upward stirring effect, which will prevent the drug solution in the dissolving tank from settling during preparation and keep the drug solution in the dissolving tank in a suspended state. The top of the dissolving tank is equipped with a stirring device. The stirring device and the aeration device work together to ensure that the stirring inside the tank is sufficient. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a drug dispensing system used in an embodiment of this utility model; The above-mentioned attached drawings include the following reference numerals: 1. Drug storage tank; 2. Screw feeder; 3. Drug dissolving tank; 31. Aeration pipe; 32. Aeration source; 33. Aeration port; 34. Hole; 35. Stirring device; 4. Water inlet device; 41. First pipeline; 411. Fourth control valve; 42. Second pipeline; 421. First control valve; 5. Drug delivery pipeline; 51. Second control valve; 52. Third control valve; 53. Drug delivery pump; 6. PLC controller. Detailed Implementation

[0014] The specific embodiments of this utility model are described below with reference to the accompanying drawings and examples: It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0015] Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0016] According to an embodiment of this utility model, a dispensing system is provided. Please refer to [link / reference]. Figure 1 The system includes: a medicine storage tank 1, a screw feeder 2, a dissolving tank 3, a water inlet device 4, a medicine delivery pipeline 5, and a PLC controller 6. The outlet of the medicine storage tank 1 is connected to the inlet pipeline of the screw feeder 2, and the outlet of the screw feeder 2 is connected to the inlet pipeline of the dissolving tank 3. The water inlet device 4 is connected to the water inlet of the dissolving tank 3 through a first pipeline 41. The medicine delivery pipeline 5 is connected to the outlet of the dissolving tank 3. The water inlet device 4 is connected to the medicine delivery pipeline 5 through a second pipeline 42. A first control valve 421 is provided on the second pipeline 42. A second control valve 51 and a third control valve 52 are respectively provided on the medicine delivery pipeline 5. The second control valve 51 and the third control valve 52 are located at the two ends of the connection point between the second pipeline 42 and the medicine delivery pipeline 5. The first control valve 421, the second control valve 51, and the third control valve 52 are respectively connected to the PLC controller 6 via signals. The second pipeline 42 is equipped with a first control valve 421, and the drug delivery pipeline 5 is equipped with a second control valve 51 and a third control valve 52. Deposits will accumulate on the wall of the drug delivery pipeline 5, forming crystals. The PLC controller 6 periodically controls the opening and closing of each control valve. When the first control valve 421 and the second control valve 51 are open, and the third control valve 52 is closed, water released from the water inlet device 4 flows through the second pipeline 42 to the dissolving tank 3 to backwash the drug delivery pipeline 5. When the first control valve 421 and the third control valve 52 are open, and the second control valve 51 is closed, water released from the water inlet device 4 flows through the second pipeline 42 to the drug delivery point, forward washing the drug delivery pipeline 5. Preferably, every 12 hours of system operation, the PLC controller 6 controls each control valve, performing a 3-minute forward wash and a 1-minute backwash. The forward and backwashes work together to flush away the crystals in the drug delivery pipeline 5, preventing blockage and avoiding the need for frequent disassembly and manual flushing by maintenance personnel.

[0017] The dissolving tank 3 has an aeration device, which includes an aeration pipe 31 located inside the dissolving tank 3 and an aeration source 32 that supplies gas to the aeration pipe 31. An aeration port 33 is provided on the side wall of the dissolving tank 3. One end of the aeration port 33 is connected to the aeration pipe 31, and the other end of the aeration port 33 is connected to the aeration source 32 via a pipeline. The aeration source 32 continuously supplies gas to the aeration pipe 31 through the aeration port 33.

[0018] The aeration pipe 31 has holes 34 in its wall so that the gas inside the aeration pipe 31 can be released into the dissolving tank 3 through the holes 34. The dissolving tank 3 is equipped with an aeration pipe 31 with holes 34 inside. When the gas rushes out from the holes 34, it will generate an upward stirring effect, which will prevent the drug solution in the dissolving tank 3 from settling and keep the drug solution in a suspended state.

[0019] There are multiple holes 34, and the air outlet direction of the multiple holes 34 is towards the top of the dissolving tank 3. Multiple upward-facing holes 34 make the air outlet more uniform and rapid, reducing the amount of ferric hydroxide colloid or precipitate produced by hydrolysis reaction due to insufficient dissolution and stirring of the drug solution.

[0020] The dissolving tank 3 is equipped with a stirring device 35. The stirring device 35 further disperses the medicine and solvent in the dissolving tank 3 to form a uniform medicine solution.

[0021] The screw feeder 2 is a variable frequency speed control type screw feeder, which is equipped with a frequency converter. The variable frequency speed control type screw feeder can precisely and adjustablely convey materials, achieving stable and accurate control of the reagent flow rate. The frequency converter is responsible for controlling the speed of the motor driving the screw feeder 2.

[0022] The frequency converter of the screw feeder 2 is connected to the PLC controller 6 via signal connection; a fourth control valve 411 is installed on the first pipeline 41, and the fourth control valve 411 is connected to the PLC controller 6 via signal connection. The PLC controller 6 connects the frequency converter of the screw feeder 2 to the fourth control valve 411 on the first pipeline 41 via signal connection, and achieves precise drug dosing by adjusting the amount of added agent and solvent, thus ensuring the stability of the drug concentration.

[0023] The drug delivery pipeline 5 is equipped with a drug delivery pump 53. The drug delivery pump 53 provides power for drug delivery.

[0024] The specific process of this utility model is as follows: The reagent is added to the reagent storage tank 1 and transported to the dissolving tank 3 by the screw feeder 2. The screw feeder 2 is equipped with a frequency converter; preferably, it is a variable frequency speed control type screw feeder. After the reagent falls into the dissolving tank 3, it is quickly and evenly dispersed in the tank 3 under the combined action of the stirring device 35 and the aeration device. The aeration device includes an aeration pipe 31 and an aeration source 32. The aeration source 32 provides a continuous supply of gas to the aeration pipe 31 through the aeration port 33. The aeration pipe 31 has upward-facing holes 34 through which the gas enters the dissolving tank 3. The water inlet device 4 supplies water to the dissolving tank 3 through the first pipeline 41. The first pipeline 41 is equipped with a fourth control valve 411. The fourth control valve 411, the frequency converter of the screw feeder 2, and the PLC controller 6 are connected by signals to automatically regulate the amount of water and reagent entering the tank to achieve the required concentration of the solution. The prepared drug solution in the dissolving tank 3 is transported outward through the drug delivery pipeline 5. The drug delivery pipeline 5 is equipped with a drug delivery pump 53 that provides power to the pipeline. The drug delivery pipeline 5 is also equipped with a second control valve 51 and a third control valve 52. The second control valve 51 and the third control valve 52 are located at the two ends of the connection point between the second pipeline 42 and the drug delivery pipeline 5, respectively. The first control valve 421, the second control valve 51 and the third control valve 52 are respectively connected to the PLC controller 6 for signal transmission. When precipitates crystallize on the wall of the drug delivery pipeline 5, the PLC controller 6 stops the frequency converter of the screw feeder 2 and closes the fourth control valve 411 to stop feeding. The PLC controller 6 periodically controls the opening and closing of the control valves: the first control valve 421 and the second control valve 51 open, and the third control valve 52 closes to backwash the drug delivery pipeline 5; the first control valve 421 and the third control valve 52 open, and the second control valve 51 closes to forward wash the drug delivery pipeline 5. The forward and backwashing work together to flush away the crystals in the drug delivery pipeline 5 with water, preventing the crystals from clogging the pipeline and avoiding the need for maintenance personnel to frequently disassemble the pipeline for manual flushing.

[0025] Many other changes and modifications can be made without departing from the concept and scope of this utility model. It should be understood that this utility model is not limited to the specific embodiments, and the scope of this utility model is defined by the appended claims.

Claims

1. A medication dispensing system, characterized in that, The device includes a medicine storage tank, a screw feeder, a dissolving tank, a water inlet device, a drug delivery pipeline, and a PLC controller. The outlet of the medicine storage tank is connected to the inlet pipeline of the screw feeder, and the outlet of the screw feeder is connected to the inlet pipeline of the dissolving tank. The water inlet device is connected to the water inlet of the dissolving tank through a first pipeline. The drug delivery pipeline is connected to the outlet of the dissolving tank. The water inlet device is connected to the drug delivery pipeline through a second pipeline. A first control valve is provided on the second pipeline. A second control valve and a third control valve are respectively provided on the drug delivery pipeline. The second and third control valves are located at opposite ends of the connection point between the second pipeline and the drug delivery pipeline. The first, second, and third control valves are respectively connected to the PLC controller via signals.

2. The dispensing system according to claim 1, characterized in that, The dissolving tank has an aeration device, which includes an aeration pipe located inside the dissolving tank and an aeration source that provides gas to the aeration pipe. An aeration port is provided on the side wall of the dissolving tank. One end of the aeration port is connected to the aeration pipe, and the other end of the aeration port is connected to the aeration source through a pipeline.

3. A dispensing system according to claim 2, characterized in that, The aeration pipe has holes in its wall so that the gas inside the aeration pipe can be released into the dissolving tank through the holes.

4. A dispensing system according to claim 3, characterized in that, There are multiple holes, and the outlet direction of the multiple holes is towards the top of the dissolving tank.

5. A dispensing system according to claim 1, characterized in that, The dissolving tank is equipped with a stirring device.

6. A dispensing system according to claim 1, characterized in that, The screw feeder is a variable frequency speed control type screw feeder, which has a frequency converter.

7. A dispensing system according to claim 1, characterized in that, The frequency converter of the screw feeder is connected to the PLC controller via signal; a fourth control valve is installed on the first pipeline, and the fourth control valve is connected to the PLC controller via signal.

8. A dispensing system according to claim 1, characterized in that, The drug delivery pipeline is equipped with a drug delivery pump.

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