Multipath constant dosing system

Abstract

The utility model discloses a multipath constant dosing system, including storage box, pump medicine device, dosing device and pipeline structure, the storage box is equipped with the medicine inlet, install the blender in the storage box, the pipeline structure includes liquid inlet pipe, communication pipe and liquid outlet pipe, liquid inlet pipe is communicated with the lower end of storage box, the communication pipe is communicated with the liquid outlet pipe, and the liquid outlet pipe is communicated with the lower end of storage box. The pesticide pumping device is communicated with the liquid inlet pipe, the lower end of the communicating pipe is communicated with the pesticide pumping device, the liquid outlet pipe is communicated with the communicating pipe, the upper end of the communicating pipe is communicated with a backflow box, a backflow pipe is arranged between the backflow box and the pesticide storage box, and the two ends of the backflow pipe are communicated with the pesticide storage box and the lower end of the backflow box respectively. The backflow pipe is provided with a flow meter, and the liquid outlet pipe is located between the backflow box and the pesticide pumping device. The chemical adding device has the beneficial effects that chemicals can be conveniently and uniformly added into a plurality of oil filtering pools, the chemical adding efficiency is improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of dosing systems, specifically to a multi-channel constant-rate dosing system. Background Technology

[0002] The top of the chemical oil separator in a steel plant consists of multiple oil filtration tanks. Traditional production methods require manual labor to carry chemicals from the ground to the top of the tanks daily, place the bags between two tanks sharing a common grid, then cut the bags with a knife and drag them to scatter the chemicals into the tanks. Approximately six bags (25 kg each) are added each time. This method suffers from problems such as long processing time, extremely high labor intensity, chemicals sticking to the grid, uneven dosage, and insufficient chemical solubility. To solve these problems, a multi-channel constant-rate dosing system needs to be designed to overcome the technical difficulty of uniformly adding chemicals to multiple oil filtration tanks using traditional methods. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a multi-channel constant-volume dosing system, which includes a drug storage tank, a pump device, a dosing device and a pipeline structure. This multi-channel constant-volume dosing system has the advantage of being able to uniformly add the agent to multiple oil filter tanks.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0005] A multi-channel constant-volume dosing system includes a drug storage tank, a pumping device, dosing devices, and a piping structure. The drug storage tank has a drug inlet and a stirrer is installed inside. The piping structure includes an inlet pipe, a connecting pipe, and an outlet pipe. The inlet pipe is connected to the lower end of the drug storage tank. The pumping device is connected to the inlet pipe. The lower end of the connecting pipe is connected to the pumping device. The outlet pipe is connected to the connecting pipe. Multiple dosing devices are provided. Each dosing device includes a dosing pipe and a dosing solenoid valve. The outlet pipe is connected to the dosing pipe. The dosing solenoid valve is installed on the dosing pipe. The upper end of the connecting pipe is connected to a reflux tank. The upper end of the reflux tank has a vent. A reflux pipe is provided between the reflux tank and the drug storage tank. The two ends of the reflux pipe are connected to the lower ends of the drug storage tank and the reflux tank, respectively. A flow meter is installed on the reflux pipe. The outlet pipe is located between the reflux tank and the pumping device. A pressure relief valve is installed between the outlet pipe and the reflux tank on the connecting pipe.

[0006] With this setup, multiple dosing devices are located on multiple oil filtration tanks, allowing for the independent delivery of chemical solutions to each tank. The chemicals are mixed thoroughly in the storage tank before being added to the filtration tanks, improving solubility and ensuring uniform mixing. This allows for the even distribution of fully dissolved chemicals to each filtration tank, facilitating efficient dosing and reducing manual labor.

[0007] Preferably, the pumping device includes a first expansion tube, a pumping tube, and a second expansion tube. The first expansion tube and the second expansion tube are respectively connected to an inlet tube and a connecting tube. The first expansion tube is connected to a plurality of first manifolds, and the second expansion tube is connected to a plurality of second manifolds. The two ends of the pumping tube are respectively connected to the first manifolds and the second manifolds, and a dosing pump is installed on the pumping tube.

[0008] This setup, with multiple first and second manifolds, allows for convenient addition of pump tubing and dosing pumps.

[0009] Preferably, the system also includes a PLC module, which is electrically connected to the dosing pump and multiple dosing solenoid valves, and is electrically connected to a touch screen and a host computer.

[0010] This setup facilitates the control of the dosing pump and the dosing solenoid valve.

[0011] Preferably, the second manifold is equipped with a one-way valve.

[0012] This setup allows for the convenient addition of pump tubing.

[0013] Preferably, the first manifold is equipped with a valve.

[0014] This setup allows for the convenient addition of pump tubing.

[0015] The flow meter is electrically connected to the PLC module.

[0016] This setting makes it easy to view the detection data collected by the flow meter.

[0017] Preferably, the return pipe has a downwardly bent section, and the flow meter is located at the bent section.

[0018] This setting ensures the accuracy of the flow meter's detection.

[0019] Preferably, the medicine storage box is equipped with a water inlet pipe.

[0020] This design facilitates the addition of water and medicine to the medicine storage tank.

[0021] Preferably, the water inlet pipe is equipped with a water inlet solenoid valve, which is electrically connected to the PLC module.

[0022] This setup allows for convenient control of the water inlet solenoid valve via PLC.

[0023] Preferably, the medicine storage tank is equipped with a level gauge.

[0024] This design facilitates the monitoring of the liquid level in the medicine storage tank.

[0025] Compared with the prior art, this utility model has achieved beneficial technical effects:

[0026] 1. Multiple dosing devices are located on multiple oil filtration tanks, allowing for the delivery of chemicals to each tank independently. The chemicals are mixed thoroughly in the storage tank before being added to the filtration tanks, improving solubility and ensuring uniform mixing. This allows for the even distribution of fully dissolved chemicals to each filtration tank, addressing the technical challenge of evenly adding chemicals to multiple tanks, improving dosing efficiency, and reducing manual labor intensity.

[0027] 2. The return pipe and return box can ensure that the liquid in the connecting pipe is fully supplied to multiple dosing devices, and can also prevent excessive liquid pressure in the connecting pipe. The structure is simple, the operation is stable and reliable, and the dosing amount of each oil filter tank is stable.

[0028] 3. Each oil filtration tank is equipped with two dosing devices, one for primary use and one for backup. When the primary dosing device malfunctions or requires maintenance, the PLC module controls the primary dosing device to stop working and simultaneously activates the backup dosing device to add chemicals to the oil filtration tank, thereby maintaining a constant dosing rate. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a multi-channel constant dosage system according to an embodiment of the present invention.

[0030] The technical features referred to by the various reference numerals in the accompanying drawings are as follows:

[0031] 11. Drug storage tank; 12. Drug inlet; 13. Mixer; 14. Water inlet pipe; 15. Water inlet solenoid valve; 16. Level gauge; 21. Liquid inlet pipe; 22. Connecting pipe; 23. Liquid outlet pipe; 24. Return tank; 25. Return pipe; 26. Flow meter; 27. Bend section; 28. Pressure relief valve; 31. First expansion pipe; 32. First manifold; 33. Second expansion pipe; 34. Second manifold; 35. Drug pump pipe; 36. Drug dosing pump; 37. Check valve; 38. Valve; 41. Drug dosing pipe; 42. Drug dosing solenoid valve. Detailed Implementation

[0032] To make the objectives, technical solutions and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments. However, the scope of protection of this utility model is not limited to the specific embodiments described below.

[0033] refer to Figure 1 A multi-channel constant-volume dosing system includes a drug storage tank 11, a pump device, a dosing device, a piping structure, and a PLC module. The drug storage tank 11 is provided with a drug inlet 12, and a stirrer 13 is installed inside the drug storage tank 11. The piping structure includes an inlet pipe 21, a connecting pipe 22, and an outlet pipe 23. The inlet pipe 21 is connected to the lower end of the drug storage tank 11, the pump device is connected to the inlet pipe 21, the lower end of the connecting pipe 22 is connected to the pump device, and the outlet pipe 23 is connected to the connecting pipe 22. Multiple dosing devices are provided, each including a dosing pipe 41 and a dosing solenoid valve 42. The outlet pipe 23 is connected to the dosing pipe 41, and the dosing solenoid valve 42 is installed on the dosing pipe 41.

[0034] The upper end of the connecting pipe 22 is connected to a return box 24, and the upper end of the return box 24 is provided with a vent. A return pipe 25 is provided between the return box 24 and the drug storage tank 11. The two ends of the return pipe 25 are connected to the lower ends of the drug storage tank 11 and the return box 24, respectively. A flow meter 26 is installed on the return pipe 25. The outlet pipe 23 is located between the return box 24 and the pumping device. A pressure relief valve 28 is installed on the connecting pipe 22 between the outlet pipe 23 and the return box 24. The return pipe 25 has a downward-bending section 27, and the flow meter 26 is located at the bending section 27. This ensures that even when the flow rate of the drug in the return pipe 25 is low, the bending section 27 at the flow meter 26 is still full of drug, thus ensuring the detection accuracy of the flow meter 26. The medicine storage tank 11 is equipped with a water inlet pipe 14 and a dosing port. A water inlet solenoid valve 15 is installed on the water inlet pipe 14, and a level gauge 16 is installed in the medicine storage tank 11. The water inlet solenoid valve 15 and the level gauge 16 are electrically connected to the PLC module. The medicine is added to the medicine storage tank 11 through the dosing port, and water is added to the medicine storage tank 11 through the water inlet pipe 14, facilitating the addition of water and medicine to the medicine storage tank 11.

[0035] The dosing pump device includes a first expansion pipe 31, a dosing pump pipe 35, and a second expansion pipe 33. The first and second expansion pipes 31 and 33 are connected to the inlet pipe 21 and the connecting pipe 22, respectively. The first expansion pipe 31 is connected to multiple first manifolds 32, and the second expansion pipe 33 is connected to multiple second manifolds 34. Both ends of the dosing pump pipe 35 are connected to the first and second manifolds 32 and 34, respectively, and a dosing pump 36 is installed on the dosing pump pipe 35. As the factory develops and production scale gradually expands, oil filtration tanks will be added one by one. Each newly added oil filtration tank needs to be equipped with a dosing device connected to the outlet pipe 23. Therefore, it is necessary to add dosing devices one by one, and also to add dosing pump pipes 35 and dosing pumps 36 one by one to ensure that sufficient liquid medicine can be delivered into the dosing pipe 41. The multiple first manifolds 32 and second manifolds 34 facilitate the addition of dosing pump pipes 35 and dosing pumps 36. A one-way valve 37 is installed on the second manifold 34. To prevent the liquid medicine in the connecting pipe 22 from being discharged through the second manifold 34, a pump-pump tube 35 can be installed on the second manifold 34 during system operation, facilitating the addition of the pump-pump tube 35. A valve 38 is installed on the first manifold 32. Closing the valve 38 prevents the liquid medicine in the inlet pipe 21 from being discharged through the first manifold 32, thus allowing the installation of the pump-pump tube 35 on the second manifold 34 during system operation, facilitating the addition of the pump-pump tube 35. The valve 38 is then opened after installation.

[0036] The PLC module is electrically connected to the dosing pump 36 and multiple dosing solenoid valves 42. The PLC module is also electrically connected to a touchscreen and a host computer. Control commands and control programs are sent to the PLC module via the touchscreen and host computer, allowing for convenient control of the dosing pump 36 and solenoid valves 42. The flow meter 26 is also electrically connected to the PLC module. The PLC module sends the detection data collected by the flow meter 26 to the touchscreen and host computer for easy viewing of the data.

[0037] The mixer 13 includes a motor and a stirring shaft. The motor is mounted on the medicine storage tank 11, and the stirring shaft is connected to the output shaft of the motor. The motor drives the stirring shaft to rotate inside the medicine storage tank 11. The rotating stirring shaft mixes the water and medicine in the medicine storage tank 11 evenly and makes the medicine fully dissolve in the water.

[0038] The medicine is poured into the storage tank 11 through the inlet 12, and water is added to the storage tank 11 through the water inlet pipe 14. Then, the water and medicine are stirred by the mixer 13 until they are evenly mixed to obtain a medicine solution. The pumping device inputs the medicine solution in the storage tank 11 into the connecting pipe 22 and the outlet pipe 23 through the inlet pipe 21, and then into the oil filter tank through the dosing pipe 41. The opening and closing of the dosing solenoid valve 42 controls the opening and closing of the dosing pipe 41. When the dosing solenoid valve 42 is open, the medicine solution can flow into the oil filter tank through the dosing pipe 41. When the dosing solenoid valve 42 is closed, the medicine solution in the dosing pipe 41 stops flowing into the oil filter tank. The function of quantitatively adding medicine to the oil filter tank is achieved by controlling the opening and closing time of the dosing solenoid valve 42.

[0039] The amount of medicine consumed in the medicine storage tank 11 can also be determined by the descending liquid level scale signal fed back from the liquid level gauge on the medicine storage tank 11, thus determining the amount of medicine supplied to the oil filter tank. This allows for the determination and verification that the system is in a constant-volume dosing state to the oil filter tank. If the liquid level in the medicine storage tank 11 descends too slowly, there may be an insufficient actual amount of medicine supplied to the oil filter tank; if the liquid level in the medicine storage tank 11 descends too quickly, there may be a leakage problem in the system. Therefore, the function of quantitative dosing to the oil filter tank can be achieved by combining the descending liquid level scale signal fed back from the liquid level gauge 16 on the medicine storage tank 11.

[0040] This embodiment has the following advantages:

[0041] Multiple dosing devices are located on multiple oil filtration tanks, allowing for the delivery of chemicals to each tank independently. The chemicals are mixed thoroughly in the storage tank 11 before being added to the oil filtration tanks, improving solubility and ensuring uniform mixing. This allows for the even addition of fully dissolved chemicals to each oil filtration tank, addressing the technical challenge of conveniently and evenly distributing chemicals across multiple tanks, improving dosing efficiency, and reducing manual labor intensity.

[0042] Each oil filter tank is equipped with two dosing devices, one for primary use and one for backup. When the primary dosing device malfunctions or requires maintenance, the PLC module controls the primary dosing device to stop working and simultaneously activates the backup dosing device to add chemicals to the oil filter tank, thereby maintaining a constant dosing rate.

[0043] Adding a dosing device increases the discharge volume of the chemical solution, reducing the amount of solution returning to the storage tank 11 via the return pipe 25. Adding the pump pipe 35 and the dosing pump 36 increases the amount of solution flowing through the connecting pipe 22, further increasing the amount returning to the storage tank 11 via the return pipe 25. If too little or no solution returns to the storage tank 11 via the return pipe 25, there is insufficient supply to the dosing device, preventing it from maintaining a constant dosing rate. Conversely, if too much solution returns to the storage tank 11 via the return pipe 25, the dosing pump 36 consumes excessive energy.

[0044] In this application, a flow meter 26 detects whether the liquid medicine in the return pipe 25 is flowing back into the storage tank 11. When the flow meter 26 detects that the flow rate of the liquid medicine in the return pipe 25 is zero or lower than a first alarm value close to zero (in this application, the first alarm value is 0.05 m), a warning is issued. 3 If the flow rate is less than 1 / min, it indicates that the flow rate of the medicine delivered by the pump to the connecting pipe 22 has no redundancy. The PLC module sends an alarm message of insufficient medicine supply to the touch screen and the host computer, prompting the operator to add a dosing pump 36 to ensure that the medicine in the connecting pipe 22 can be fully supplied to multiple dosing devices, so as to avoid insufficient medicine flowing through the dosing devices to the oil filter tank and ensure the stability of the dosing amount in each oil filter tank.

[0045] When the flow meter 26 detects that the flow rate of the liquid medicine in the return pipe 25 is greater than the second alarm value (the second alarm value in this application is 0.8m), 3 ( / min) The PLC module sends an alarm message about excessive drug supply to the touch screen and the host computer, indicating that there are too many dosing pumps 36 currently operating, and controls one of the dosing pumps 36 to stop working, thereby reducing energy consumption. If only one dosing pump 36 is still operating, it will continue to operate to ensure that the drug solution flows to the dosing device.

[0046] When the flow meter 26 detects that the flow rate of the medicine in the return pipe 25 is greater than the first alarm value and less than the second alarm value, it indicates that there is enough medicine in the connecting pipe 22 to supply the outlet pipe 23 and the dosing device, and the system is operating normally.

[0047] When the hydraulic pressure in the connecting pipe 22 is too high, the liquid medicine in the connecting pipe 22 can be released into the return box 24 through the pressure relief valve 28, thereby controlling the liquid pressure in the connecting pipe 22 and improving the reliability of the system.

[0048] Therefore, the return pipe 25 and the return box 24 can ensure that the liquid in the connecting pipe 22 is fully supplied to multiple dosing devices, and can also prevent the liquid pressure in the connecting pipe 22 from being too high. The structure is simple, the operation is stable and reliable, and the dosing amount of each oil filter tank is stable.

[0049] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the utility model.

Claims

1. A multi-channel constant-rate dosing system, characterized in that: The system includes a medicine storage tank (11), a pumping device, a dosing device, and a piping structure. The medicine storage tank (11) has a medicine inlet (12), and a stirrer (13) is installed inside the medicine storage tank (11). The piping structure includes an inlet pipe (21), a connecting pipe (22), and an outlet pipe (23). The inlet pipe (21) is connected to the lower end of the medicine storage tank (11), the pumping device is connected to the inlet pipe (21), the lower end of the connecting pipe (22) is connected to the pumping device, and the outlet pipe (23) is connected to the connecting pipe (22). Multiple dosing devices are provided, each including a dosing pipe (41) and a dosing solenoid valve (42). The outlet pipe (23)... The dosing solenoid valve (42) is connected to the dosing pipe (41). The upper end of the connecting pipe (22) is connected to the return box (24). The upper end of the return box (24) is provided with a vent. The return pipe (25) is provided between the return box (24) and the storage tank (11). The two ends of the return pipe (25) are respectively connected to the lower end of the storage tank (11) and the return box (24). The flow meter (26) is installed on the return pipe (25). The outlet pipe (23) is located between the return box (24) and the pump device. The connecting pipe (22) is equipped with a pressure relief valve (28) located between the outlet pipe (23) and the return box (24).

2. The multi-channel constant-rate dosing system according to claim 1, characterized in that: The pumping device includes a first expansion tube (31), a pumping tube (35), and a second expansion tube (33). The first expansion tube (31) and the second expansion tube (33) are respectively connected to the inlet tube (21) and the connecting tube (22). The first expansion tube (31) is connected to a plurality of first manifolds (32), and the second expansion tube (33) is connected to a plurality of second manifolds (34). The two ends of the pumping tube (35) are respectively connected to the first manifolds (32) and the second manifolds (34). A dosing pump (36) is installed on the pumping tube (35).

3. The multi-channel constant-rate dosing system according to claim 2, characterized in that: It also includes a PLC module, which is electrically connected to the dosing pump (36) and multiple dosing devices, and the PLC module is electrically connected to a touch screen and a host computer.

4. The multi-channel constant-rate dosing system according to claim 2, characterized in that: The second manifold (34) is equipped with a check valve (37).

5. The multi-channel constant-rate dosing system according to claim 2, characterized in that: The first manifold (32) is equipped with a valve (38).

6. The multi-channel constant-rate dosing system according to claim 3, characterized in that: The flow meter (26) is electrically connected to the PLC module.

7. The multi-channel constant-rate dosing system according to claim 6, characterized in that: The return pipe (25) has a downwardly bent section (27), and the flow meter (26) is located at the bent section (27).

8. The multi-channel constant-rate dosing system according to claim 3, characterized in that: The medicine storage box (11) is equipped with a water inlet pipe (14).

9. The multi-channel constant-rate dosing system according to claim 8, characterized in that: The water inlet pipe (14) is equipped with a water inlet solenoid valve (15), and the water inlet solenoid valve (15) and the level gauge (16) are electrically connected to the PLC module respectively.

10. The multi-channel constant-rate dosing system according to claim 1, characterized in that: The medicine storage tank (11) is equipped with a level gauge (16).

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