A dosing device for precise dosage in a coal washing plant

Abstract

This utility model discloses a dosing device for precise chemical dosing in a coal washing plant, comprising a protective box, an electric push rod mounted on top of the protective box, a chemical storage chamber installed inside the protective box, the chemical storage chamber being fixedly connected to the output end of the electric push rod, a flow meter installed at the bottom output end of the chemical storage chamber, a dosing solenoid valve installed at the output end below the flow meter, limit rods fixedly mounted on both sides of the chemical storage chamber, a second transmission rod movably mounted below the right limit rod, a first transmission rod mounted below the second transmission rod, an extension hole at the bottom of the protective box, and a baffle movably mounted below the extension hole. This utility model, by setting up a protective box and a rotating, opening and closing baffle, allows the dosing device to retract into the protective box when not in use, preventing dust from the external environment from adhering to the output ports of the flow meter and the dosing solenoid valve, causing blockage of the dosing solenoid valve and affecting the accuracy of the flow meter.

Description

Technical Field

[0001] This utility model relates to the field of chemical dosing devices, specifically a chemical dosing device for precise chemical dosing in coal washing plants. Background Technology

[0002] Coal washing plants, as the core link in the clean utilization of coal, separate coal from gangue impurities through physicochemical methods. The dosing device is the "heart" of its flotation process—precisely injecting collectors (such as diesel fuel) and frothers (such as MIBC) into the coal slurry under high dust and corrosive conditions. This alters the hydrophobicity of coal particle surfaces, achieving efficient separation of fine coal slurry. The precision of this device directly determines the clean coal recovery rate and reagent costs, making it a key piece of equipment for achieving the dual goals of "coal slurry resource utilization" and "zero wastewater discharge" in coal washing plants.

[0003] Because the high concentration of dust in coal washing plants poses a cascading hazard to the dosing system, silicate particles in the coal dust continuously adhere to the surface of the flowmeter electrodes, forming a dense insulating scale layer, which leads to the attenuation of the electromagnetic flowmeter's excitation signal and affects the flowmeter's detection performance. At the same time, the dust combines with the residual liquid at the output port of the solenoid valve, generating a viscous gel-like substance in the high humidity environment of the valve cavity, which quickly blocks the output port flow channel, affecting the efficiency of the dosing agent and increasing the maintenance frequency. Therefore, we propose a dosing device for precise dosing in coal washing plants. Utility Model Content

[0004] The purpose of this invention is to provide a dosing device for precise dosing in coal washing plants, in order to solve the problems mentioned in the background art, such as the cascading hazards of high-concentration dust in coal washing plants to the dosing system, the continuous adhesion of silicate particles in coal dust to the surface of flowmeter electrodes to form a dense insulating scale layer, which leads to the attenuation of the electromagnetic flowmeter excitation signal and affects the flowmeter's detection effect; at the same time, the dust combines with the residual liquid at the output port of the solenoid valve to generate a viscous gel in the high humidity environment of the valve cavity, which quickly blocks the output port flow channel, affects the efficiency of the dosing and increases the maintenance frequency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dosing device for precise dosage in a coal washing plant, comprising:

[0006] A protective box is provided, with an electric push rod mounted on top. A drug storage chamber is installed inside the protective box, and the drug storage chamber is fixedly connected to the output end of the electric push rod. A flow meter is installed at the bottom output end of the drug storage chamber, and a dosing solenoid valve is installed below the flow meter's output end. Limit rods are fixedly mounted on both sides of the drug storage chamber. A second transmission rod is movably mounted below the right limit rod, and a first transmission rod is mounted below the second transmission rod. An extension hole is provided at the bottom of the protective box, and a baffle is movably mounted below the extension hole. The shape and size of the baffle are larger than the shape and size of the extension hole. The baffle is movably connected to the first transmission rod. A PLC controller is installed at the front end of the protective box, and the PLC controller is electrically connected to the electric push rod, the flow meter, and the dosing solenoid valve.

[0007] As a preferred embodiment of the dosing device for precise dosage in a coal washing plant according to this utility model, the second transmission rod is further provided with:

[0008] A telescopic hole is formed at the bottom of the second transmission rod. A telescopic rod is movably installed inside the telescopic hole. A spring is installed at the bottom of the telescopic rod. The telescopic rod is fixedly connected to the first transmission rod. The second transmission rod is elastically connected to the first transmission rod through the spring.

[0009] As a preferred embodiment of the precise dosage device for coal washing plants according to this utility model, the chemical storage bin further includes:

[0010] A dosing pipe is integrally fixedly installed on the left side of the drug storage chamber, and the drug storage chamber is connected to the dosing pipe. The dosing pipe passes through the top of the protective box. A connecting bearing is installed in the middle of the top of the drug storage chamber. A stirring transmission rod is installed inside the connecting bearing. A first transmission gear is fixedly installed on the top of the stirring transmission rod. A second transmission gear is installed on the right side of the first transmission gear. A fourth transmission gear is installed on the right side of the second transmission gear. A second bevel gear is integrally fixedly installed above the fourth transmission gear. A first bevel gear is installed at the rear end of the second bevel gear. A third transmission gear is integrally fixedly installed at the rear end of the first bevel gear. A stirring rod is integrally fixedly installed on the lower surface of the stirring transmission rod. A toothed plate is installed on the right side of the third transmission gear.

[0011] In a preferred embodiment of the dosing device for precise dosing in a coal washing plant according to this utility model, the stirring transmission rod is movably connected to the chemical storage bin via the connecting bearing; the second transmission gear is movably connected to the chemical storage bin; the fourth transmission gear is movably connected to the chemical storage bin; the third transmission gear is movably connected to the chemical storage bin; the toothed plate is fixedly connected to the chemical storage bin; the first transmission gear meshes with the second transmission gear; the second transmission gear meshes with the fourth transmission gear; the first bevel gear meshes with the second bevel gear; and the third transmission gear meshes with the toothed plate.

[0012] As a preferred embodiment of the precise dosage device for coal washing plants according to this utility model, the protective box is further provided with:

[0013] A limiting slide rail is fixedly installed on both sides of the inner wall of the protective box. A limiting slider is movably installed inside the limiting slide rail, and the limiting slider is fixedly connected to the limiting rod.

[0014] Compared with the prior art, this utility model provides a dosing device for precise dosage in coal washing plants, which has the following beneficial effects:

[0015] 1. This utility model, by setting up a protective box and a rotating and opening baffle, allows the dosing device to retract into the protective box when not in use, thus preventing dust from the external environment from sticking to the output port of the flow meter and the dosing solenoid valve, causing blockage of the dosing solenoid valve and affecting the accuracy of the flow meter;

[0016] 2. This utility model uses a toothed plate and multiple gears to move up and down in the drug storage chamber, which drives the stirring transmission rod and the stirring rod on its surface to rotate, stirring the drug liquid, forcibly breaking down the drug layering, and making the active molecules of the drug evenly dispersed. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0019] Figure 3 This is a three-dimensional structural diagram of the medicine storage compartment of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the medicine storage compartment of this utility model;

[0021] Figure 5 This is a schematic diagram of the connection structure between the first transmission rod and the second transmission rod of this utility model;

[0022] Figure 6 This is a schematic diagram of the connection structure between the limiting slide rail and the limiting rod of this utility model.

[0023] In the diagram: 1. Protective box; 2. Dosing pipe; 3. Electric push rod; 4. Limiting slide rail; 5. Limiting rod; 6. Flow meter; 7. Dosing solenoid valve; 8. Expansion hole; 9. Baffle; 10. First transmission rod; 11. Second transmission rod; 12. Drug storage bin; 13. Gear plate; 14. Connecting bearing; 15. First transmission gear; 16. Second transmission gear; 17. Third transmission gear; 18. First bevel gear; 19. Second bevel gear; 20. Fourth transmission gear; 21. PLC controller; 22. Stirring rod; 23. Stirring transmission rod; 24. Telescopic rod; 25. Spring; 26. Telescopic hole; 27. Limiting slider. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-6 A fine-dosing dosing device for coal washing plants includes a protective box 1. An electric push rod 3 is installed on the top of the protective box 1. A drug storage bin 12 is installed inside the protective box 1. The drug storage bin 12 is fixedly connected to the output end of the electric push rod 3. A flow meter 6 is installed at the bottom output end of the drug storage bin 12. A dosing solenoid valve 7 is installed at the output end below the flow meter 6. Limit rods 5 are fixedly installed on both sides of the drug storage bin 12. A second transmission rod 11 is movably installed below the right limit rod 5. A first transmission rod 10 is installed below the second transmission rod 11. An extension hole 8 is opened at the bottom of the protective box 1. A baffle 9 is movably installed below the extension hole 8. The shape and size of the baffle 9 are larger than the shape and size of the extension hole 8. The baffle 9 is movably connected to the first transmission rod 10. A PLC controller 21 is installed at the front end of the protective box 1. The PLC controller 21 is electrically connected to the electric push rod 3, the flow meter 6 and the dosing solenoid valve 7 respectively.

[0026] In this implementation plan: by setting up a protective box 1 and a rotating baffle 9, the dosing device is retracted into the protective box 1 when not in use, so as to prevent dust from the external environment from sticking to the output port of the flow meter 6 and the dosing solenoid valve 7, causing the dosing solenoid valve 7 to be blocked and affecting the accuracy of the flow meter 6.

[0027] Furthermore:

[0028] In an optional embodiment, the second transmission rod 11 is further provided with:

[0029] Telescopic hole 26 is provided at the bottom of the second transmission rod 11. Telescopic rod 24 is movably installed inside telescopic hole 26. Spring 25 is installed at the bottom of telescopic rod 24. Telescopic rod 24 is fixedly connected to the first transmission rod 10. The second transmission rod 11 is elastically connected to the first transmission rod 10 through spring 25.

[0030] In this implementation scheme: when the baffle 9 covers the protruding hole 8, the spring 25 exerts an upward pulling force on the second transmission rod 11 through its own elasticity, thereby making the baffle 9 fit more closely with the protective box 1 and avoiding gaps between the baffle 9 and the protective box 1.

[0031] Furthermore:

[0032] In an optional embodiment, the drug storage compartment 12 is further provided with:

[0033] The dosing pipe 2 is integrally fixedly installed on the left side of the drug storage chamber 12, and the drug storage chamber 12 is connected to the dosing pipe 2. The dosing pipe 2 passes through the top of the protective box 1. A connecting bearing 14 is installed in the middle of the top of the drug storage chamber 12. A stirring transmission rod 23 is installed inside the connecting bearing 14. A first transmission gear 15 is fixedly installed on the top of the stirring transmission rod 23. A second transmission gear 16 is installed on the right side of the first transmission gear 15. A fourth transmission gear 20 is installed on the right side of the second transmission gear 16. A second bevel gear 19 is integrally fixedly installed above the fourth transmission gear 20. A first bevel gear 18 is installed at the rear end of the second bevel gear 19. A third transmission gear 17 is integrally fixedly installed at the rear end of the first bevel gear 18. A stirring rod 22 is integrally fixedly installed on the lower surface of the stirring transmission rod 23. A toothed plate 13 is installed on the right side of the third transmission gear 17.

[0034] In this implementation scheme: when the toothed plate 13 and multiple gears move up and down in the drug storage chamber 12, they drive the stirring transmission rod 23 and the stirring rod 22 on its surface to rotate, stirring the drug liquid, forcibly breaking up the drug layering, and making the active molecules of the drug evenly dispersed.

[0035] Furthermore:

[0036] In an optional embodiment, the stirring transmission rod 23 is movably connected to the drug storage chamber 12 via the connecting bearing 14, the second transmission gear 16 is movably connected to the drug storage chamber 12, the fourth transmission gear 20 is movably connected to the drug storage chamber 12, the third transmission gear 17 is movably connected to the drug storage chamber 12, the toothed plate 13 is fixedly connected to the drug storage chamber 12, the first transmission gear 15 is meshed with the second transmission gear 16, the second transmission gear 16 is meshed with the fourth transmission gear 20, the first bevel gear 18 is meshed with the second bevel gear 19, and the third transmission gear 17 is meshed with the toothed plate 13.

[0037] In this implementation scheme: the up-and-down movement of the medicine storage chamber 12 through the gear plate 13 and multiple gears is converted into the rotational force of the stirring transmission rod 23. The movement of the medicine storage chamber 12 and the rotation of the stirring transmission rod 23 share a common power source, making the cooperation between the two more coordinated.

[0038] Furthermore:

[0039] In an optional embodiment, the protective box 1 is further provided with:

[0040] The limiting slide rail 4 is fixedly installed on both sides of the inner wall of the protective box 1. The limiting slide rail 4 has a movably installed limiting slider 27, which is fixedly connected to the limiting rod 5.

[0041] In this implementation plan: when the medicine storage chamber 12 moves up and down, the limiting slide rail 4, the limiting slider 27 and the limiting rod 5 work together to make the movement of the medicine storage chamber 12 more stable.

[0042] Working Principle: When using this fine-dosing dosing device in a coal washing plant, firstly, the protective box 1 is installed on the mixing tank of the coal washing equipment. Then, during dosing, the electric push rod 3 (model: HLT40) is controlled by the PLC controller 21 to push the storage bin 12 downwards a certain distance. During the downward movement of the storage bin 12, the first transmission rod 10 and the second transmission rod 11 push the baffle 9 downwards to open the extension hole 8, allowing the dosing solenoid valve 7 to extend from the extension hole 8. At the same time, the third transmission gear 17 rotates under the action of the toothed plate 13, which drives the fourth transmission gear 20 to rotate through the first bevel gear 18 and the second bevel gear 19. Then, the first transmission gear 15 and the second transmission gear 16 drive the stirring transmission rod 23 and the stirring rod 22 to rotate, stirring the liquid inside the storage bin 12 to make the liquid uniform. The PLC controller 21 controls the opening of the dosing solenoid valve 7 to inject the liquid into the mixing tank. The flow meter 6 (model: LFLWGY) monitors the injection volume of the liquid in real time. When the injection volume reaches the preset value, the information is fed back to the PLC controller 21. The PLC controller 21 controls the dosing solenoid valve 7 (model: 308308.JY.02) to close, and at the same time controls the electric push rod 3 to move the storage bin 12 upward a certain distance to return to its original position. During this process, the first transmission rod 10 and the second transmission rod 11 pull the baffle 9 upward to rotate and cover the protrusion hole 8. The PLC controller 21 (model: FX3U) is a programmable controller. The working process and the liquid injection volume can be programmed and set in advance in the PLC controller 21. This is the working principle of the dosing device for precise dosing in this coal washing plant.

[0043] 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 dosing device for precise dosing of a coal washery, characterized in that, include: A protective box (1) is provided, with an electric push rod (3) installed on its top. A medicine storage chamber (12) is installed inside the protective box (1). The medicine storage chamber (12) is fixedly connected to the output end of the electric push rod (3). A flow meter (6) is installed at the bottom output end of the medicine storage chamber (12). A dosing solenoid valve (7) is installed at the lower output end of the flow meter (6). Limit rods (5) are fixedly installed on both sides of the medicine storage chamber (12). A second transmission rod (11) is movably installed below the right limit rod (5). A first transmission rod (10) is installed below (11). An extension hole (8) is opened at the bottom of the protective box (1). A baffle (9) is movably installed below the extension hole (8). The shape and size of the baffle (9) are larger than the shape and size of the extension hole (8). The baffle (9) is movably connected to the first transmission rod (10). A PLC controller (21) is installed at the front end of the protective box (1). The PLC controller (21) is electrically connected to the electric push rod (3), the flow meter (6), and the dosing solenoid valve (7).

2. The dosing device for precise dosing of a coal preparation plant according to claim 1, characterized in that The second transmission rod (11) is also provided with: A telescopic hole (26) is provided at the bottom of the second transmission rod (11). A telescopic rod (24) is movably installed inside the telescopic hole (26). A spring (25) is installed at the bottom of the telescopic rod (24). The telescopic rod (24) is fixedly connected to the first transmission rod (10). The second transmission rod (11) is elastically connected to the first transmission rod (10) through the spring (25).

3. The device according to claim 1, wherein the device is characterized by: The medicine storage compartment (12) is also equipped with: A dosing pipe (2) is integrally fixedly installed on the left side of the drug storage chamber (12). The drug storage chamber (12) is connected to the dosing pipe (2). The dosing pipe (2) passes through the top of the protective box (1). A connecting bearing (14) is installed in the middle of the top of the drug storage chamber (12). A stirring transmission rod (23) is installed inside the connecting bearing (14). A first transmission gear (15) is fixedly installed on the top of the stirring transmission rod (23). A second transmission gear (16) is installed on the right side of the first transmission gear (15). The fourth transmission gear (20) is installed on the right side of the second transmission gear (16). The second bevel gear (19) is integrally fixedly installed on the upper part of the fourth transmission gear (20). The first bevel gear (18) is installed at the rear end of the second bevel gear (19). The third transmission gear (17) is integrally fixedly installed at the rear end of the first bevel gear (18). The stirring rod (22) is integrally fixedly installed on the lower surface of the stirring transmission rod (23). The toothed plate (13) is installed on the right side of the third transmission gear (17).

4. The accurate dosing device for coal preparation plant according to claim 3, characterized in that, The stirring transmission rod (23) is movably connected to the medicine storage chamber (12) through the connecting bearing (14). The second transmission gear (16) is movably connected to the medicine storage chamber (12). The fourth transmission gear (20) is movably connected to the medicine storage chamber (12). The third transmission gear (17) is movably connected to the medicine storage chamber (12). The toothed plate (13) is fixedly connected to the medicine storage chamber (12). The first transmission gear (15) meshes with the second transmission gear (16). The second transmission gear (16) meshes with the fourth transmission gear (20). The first bevel gear (18) meshes with the second bevel gear (19). The third transmission gear (17) meshes with the toothed plate (13).

5. The precise dosing and dosing device of a coal washery according to claim 1, characterized in that, The protective box (1) is also equipped with: The limiting slide rail (4) is fixedly installed on both sides of the inner wall of the protective box (1). The limiting slide rail (4) has a limiting slider (27) installed inside it. The limiting slider (27) is fixedly connected to the limiting rod (5).

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