A gas injection type dosing machine

Abstract

The air spray type medicine adding machine comprises a medicine box, a measuring hopper and an air cylinder, the bottom of the medicine box is sealingly provided with the measuring hopper, the top of the measuring hopper is provided with an inlet, the bottom is provided with an outlet, the outlet of the measuring hopper is provided with a first one-way valve, the medicine outlet of the first one-way valve is connected with a stirring barrel through a medicine pipe, the inlet of the measuring hopper is provided with a measuring hopper cover plate which is matched with the size of the inlet of the measuring hopper and can seal the inlet of the measuring hopper, the middle of the measuring hopper cover plate is provided with a through hole which penetrates the upper and lower sides of the measuring hopper cover plate, the measuring hopper cover plate is fixedly provided with a guide pipe which is communicated with the through hole, the guide pipe is fixed with a guide pipe joint and communicated with the outlet of a second one-way valve through the guide pipe joint, the air cylinder is installed outside the medicine box, the piston rod end of the air cylinder is fixedly connected with the guide pipe joint and coaxially arranged with the guide pipe, and the piston rod of the air cylinder is linked with the measuring hopper cover plate through the guide pipe. The air spray type medicine adding machine has the advantages of simple structure, low cost, durability, stability, high medicine flow rate and greatly improved medicine dispersion effect.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of gas injection type dosing machine. BACKGROUND

[0002] Dosing machine is a kind of equipment widely used in the industry of mineral processing and sewage treatment, mainly used for controlling the speed and metering of dosing, and the current dosing machine mainly includes constant pressure self-flow type and pumping type.

[0003] Constant pressure self-flow type generally has a constant pressure tank, and an electromagnetic valve is arranged at the bottom of the constant pressure tank, and the metering is realized by controlling the opening time of the electromagnetic valve. The disadvantages are that the metering is not very accurate, and is greatly affected by the fluidity of the medium; because it is self-flow type, it is easy to be blocked when encountering some crystallization and agglomeration reagents, which seriously affects production. In addition, the dosing machine can only be placed at a high place, which is not conducive to daily operation and is easy to contaminate the environment.

[0004] And the pumping type mainly includes diaphragm pump and peristaltic pump. The metering of diaphragm pump is greatly affected by the fluidity of the medium, back pressure and dosing point position, and generally needs to be calibrated on site, and the price is relatively high, the diaphragm pump is easy to be damaged, the use cost is high, and the metering of the diaphragm pump is large, the volume of the diaphragm pump is also large, which is more obvious for the factories with large dosing amount and more dosing points; the metering calibration of peristaltic pump is not accurate, and the price is also very high, so the peristaltic pump is less used at present.

[0005] In addition, in the actual production process, the reagent needs to be accurately metered, and the effect of dosing needs to be considered. Because the production is a continuous process, the reagent and the ore pulp continuously flow into the stirring barrel and continuously flow out of the stirring barrel, and whether the reagent can be fully dispersed and mineralized in the stirring barrel is a key, which will directly affect the subsequent flotation effect. There are various types of reagents, and many of them are non-water-soluble, which also increases the difficulty of reagent dispersion and mineralization. SUMMARY

[0006] The present application solves the problems of the prior art and provides a gas injection type dosing machine with simple structure, low cost, durability, stability, high reagent flow rate and greatly improved reagent dispersion effect.

[0007] To achieve the above-mentioned purpose, the present application first proposes a gas injection type dosing machine, which comprises a reagent tank, a dosing hopper and a gas cylinder, the bottom of the reagent tank is sealingly installed with the dosing hopper, the top of the dosing hopper is provided with an inlet, and the bottom of the dosing hopper is provided with an outlet, a first check valve is installed on the outlet of the dosing hopper, and the reagent outlet of the first check valve is connected with a stirring barrel through a reagent pipe.

[0008] The inlet of the dosing hopper is provided with a dosing hopper cover plate matched with the size of the inlet of the dosing hopper and capable of sealing the inlet of the dosing hopper, the middle part of the dosing hopper cover plate is provided with a through hole penetrating the upper and lower sides of the dosing hopper cover plate, a guide pipe is fixed on the dosing hopper cover plate and communicates with the through hole, the guide pipe is fixed with a guide pipe joint and communicates with the outlet of the second one-way valve through the guide pipe joint,

[0009] The cylinder is installed outside the medicine box, the piston rod end of the cylinder is fixedly connected with the guide pipe joint and coaxially arranged with the guide pipe, and the piston rod of the cylinder is linked with the dosing hopper cover plate through the guide pipe.

[0010] In the embodiment, the inner diameter of the cylinder is larger than the inner diameter of the dosing hopper.

[0011] In the embodiment, the bottom of the medicine box is provided with a mounting seat capable of cooperating with the dosing hopper, a sealing ring is arranged between the mounting seat and the dosing hopper, the dosing hopper is sealingly mounted in the mounting seat of the bottom of the medicine box, so that the outlet of the dosing hopper is arranged outside the medicine box.

[0012] In the embodiment, the inlet of the dosing hopper is flush with the bottom of the medicine box.

[0013] In the embodiment, the inner cavity of the lower end of the dosing hopper is in the shape of an inverted cone.

[0014] In the embodiment, the lower edge of the dosing hopper cover plate is provided with a sealing gasket corresponding to the outlet of the dosing hopper, and the dosing hopper cover plate is sealed by being attached to the edge of the outlet of the dosing hopper through the sealing gasket.

[0015] In the embodiment, a limiting plate is further arranged in the medicine box, the limiting plate is provided with a guide hole matched with the size of the guide pipe, and the guide pipe is slidingly inserted into the guide hole.

[0016] In the embodiment, a floating ball with a diameter larger than the outlet of the dosing hopper is further arranged in the dosing hopper, and the density of the floating ball is smaller than the density of the medicament.

[0017] In the embodiment, the dosing hopper cover plate.

[0018] Due to the above structure, the device has the following advantages:

[0019] 1. The device adopts a dosing hopper, and the dosing hopper is directly mounted at the bottom of the medicine box, the medicine inlet is directly arranged in the medicine box, and the sealing cover is sealed by the cylinder, the medicament is forced to be ejected at high speed by high-pressure gas, and the dosing is completed. In this way, a metering pump is not needed, the medicament is forced out by high-pressure gas, and a non-piston and non-diaphragm form is adopted, which not only reduces the cost, but also greatly improves the service life and stability;

[0020] 2. If a conventional 0.5MPa air pressure is used as the air source, the delivery height can reach 50 meters. For a factory, the back pressure change caused by the height difference of a few meters between each dosing point is almost negligible, and the installation position of the dosing machine is not affected.

[0021] 3. The volume of the metering hopper is always fixed. By simply controlling the frequency, the dosing rate can be set very accurately. Therefore, there is no need to conduct on-site testing and calibration, which can ensure the accuracy of the measurement.

[0022] 4. Because the reagent is sprayed at high speed, it will collide violently with the slurry, which can greatly improve the dispersion effect of the reagent.

[0023] In summary, this device features a simple structure, low cost, virtually no wear, durability, and stability. It utilizes existing on-site gas sources, resulting in low operating costs. Simultaneously, it offers high output pressure and high reagent flow rate, adapting to various high-viscosity reagents while achieving high-speed jetting, significantly improving reagent dispersion and enhancing flotation performance, thus generating substantial economic value. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] In the diagram, 1. Medicine box; 2. Metering hopper; 3. Metering hopper cover; 4. Tube; 5. Tube connector; 6. Limiting plate; 7. Cylinder frame; 8. Float; 10. First check valve; 11. Medicine outlet; 12. Air inlet; 13. Cylinder; 15. Second check valve. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0028] like Figure 1 As shown, the present invention provides an air-jet dosing machine, including a medicine tank 1, a metering hopper 2, a metering hopper cover 3, a guide tube 4, a guide tube connector 5, a limit plate 6, a cylinder frame 7, a float ball 8, a first one-way valve 10, a cylinder 13, a PLC control cabinet, a solenoid valve, etc.

[0029] The bottom of the medicine box 1 is provided with a mounting seat capable of cooperating with the measuring cup 2, the measuring cup 2 is mounted and fixed in the mounting seat of the bottom of the medicine box 1, and a sealing ring is arranged in the middle to form a seal between the measuring cup 2 and the bottom of the medicine box 1. The top of the measuring cup 2 is provided with an inlet, the inner cavity of the lower end is a reverse conical type, and the bottom is provided with an outlet. A thread is arranged on the outlet. The outlet of the measuring cup 2 is threadedly connected with the inlet of the first one-way valve 10. The medicine outlet 11 of the first one-way valve 10 is connected with the factory stirring barrel through a medicine pipe.

[0030] A measuring cup cover plate 3 is arranged on the inlet of the measuring cup 2. A sealing gasket is arranged on the lower edge of the measuring cup cover plate 3 to realize sealing with the edge of the outlet of the measuring cup 2. A through hole is arranged in the middle of the measuring cup cover plate 3. A guide pipe 4 is fixed on the through hole of the measuring cup cover plate 3. The guide pipe 4 is communicated with the outlet of the second one-way valve 15 through a guide pipe joint 5. In this way, the outlet of the measuring cup 2 is communicated with the second one-way valve 15 through the measuring cup cover plate 3, the guide pipe 4 and the guide pipe joint 5.

[0031] The air cylinder 13 is mounted on the air cylinder frame 7, and the air cylinder frame 7 is fixed on the upper surface of the medicine box 1. The air inlet of the air cylinder 13 is connected with the first electromagnetic valve through an air pipe. The air inlet 12 of the second one-way valve 15 is connected with the second electromagnetic valve through an air pipe. The first and second electromagnetic valves are communicated with the high-pressure gas source through an air pipe. When the air cylinder 13 works, in order to prevent the air pressure in the measuring cup 2 from pushing back the air cylinder 13 and causing the measuring cup cover plate 3 to be lifted open, on the one hand, the locking of the first electromagnetic valve is used to maintain the pressure of the high-pressure gas in the air cylinder 13. On the other hand, the inner diameter of the air cylinder 13 can be greater than the inner diameter of the measuring cup 2 to ensure that the pushing force of the air cylinder 13 is greater than the counteracting force of the measuring cup cover plate 3.

[0032] The piston rod end of the air cylinder 13 is fixedly connected with the guide pipe joint 5 and coaxially arranged with the guide pipe 4. The medicine box 1 is further provided with a limiting plate 6. The limiting plate 6 is provided with a guide hole matched with the guide pipe 4 in size. The guide pipe 4 is slidingly inserted into the guide hole. The limiting plate 6 is used to limit the swing of the guide pipe 4 to ensure that the measuring cup cover plate 3 connected to the lower end of the guide pipe 4 is kept directly above the measuring cup 2.

[0033] The measuring cup 2 is further placed with a float ball 8 with a diameter greater than that of the outlet of the measuring cup 2. The density of the float ball 8 is less than that of the medicine.

[0034] Specific application: first through solenoid valve connected to the cylinder 13 gas pipe, while the other way through the solenoid valve connected to the second one-way valve 15. Initial state, the piston rod of cylinder 13 is in the state of retreat, thus coupled with the quantitative hopper cover plate 3 is also in the open state, when the medicine box is loaded with the corresponding medicine, the medicine will fill the quantitative hopper 2, at this time, the float 8 will float up, so that the quantitative hopper 2 bottom outlet is opened, then through the solenoid valve connected to the cylinder 13 control high pressure air cylinder 13 piston rod push out, coupled with the catheter connector 5, catheter 4 and quantitative hopper cover plate 3 downward movement, until the quantitative hopper 2 is compressed, because the quantitative hopper cover plate 3 below is provided with sealing pad, so it will form a sealed cavity with the quantitative hopper 2, then open the solenoid valve connected to the second one-way valve 15, let high pressure gas into the sealed cavity formed by the quantitative hopper 2 and quantitative hopper cover plate 3, and quickly make the pressure in the sealed cavity, so as to force the medicine to open the first one-way valve 10 connected to the bottom of the quantitative hopper 2, and from the high speed jet to the mixing barrel. Because the pressure of the forced medicine spray reaches more than 0.5 MPa, so that the medicine has a very high speed, will collide with the ore pulp in the mixing barrel, so as to split into a large number of small liquid medicine microbeads, to achieve the effect of dispersion. Of course, a dispersion nozzle can also be installed at the medicine spray outlet, which will be more conducive to the dispersion of the medicine. At the same time, the float 8 in the quantitative hopper 2 will be lowered with the quantitative hopper 2 liquid level, when the float 8 moves to the bottom of the opening under the guidance of the conical wall barrel at the lower end of the quantitative hopper 2, it will quickly block the opening, so as to prevent the large amount of gas from being sprayed out of the quantitative hopper 2. Then close the solenoid valve connected to the second one-way valve 15, cut off the high pressure gas into the quantitative hopper 2, at this time, control the solenoid valve connected to the cylinder, let the cylinder 13 piston rod retreat, and coupled with the quantitative hopper cover plate 3 is lifted, the quantitative hopper 2 will be filled with medicine again, start the next cycle of the action of adding medicine. The maximum lifting displacement of the quantitative hopper cover plate 3 should be less than the diameter of the float ball 8, such as the diameter of the float ball 8 is 20 mm, the lifting displacement of the quantitative hopper cover plate 3 should be controlled between 12 mm and 15 mm, so as to ensure that the float ball 8 will not run out of the quantitative hopper 2.

[0035] The above is only the preferred embodiment of the present application, not the patent range of the present application, any equivalent structure transformation in the concept of the present application, using the content of the present application specification and drawings, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A pneumatic spray dosing machine, characterized in that, It includes a medicine box (1), a metering hopper (2) and a cylinder (13). The bottom of the medicine box (1) is sealed with a metering hopper (2). The metering hopper (2) has an inlet at the top and an outlet at the bottom. A first one-way valve (10) is installed on the outlet of the metering hopper (2). The outlet (11) of the first one-way valve (10) is connected to the stirring tank through a medicine pipe. The inlet of the metering hopper (2) is provided with a metering hopper cover plate (3) that matches the size of the inlet of the metering hopper (2) and can seal the inlet of the metering hopper (2). The middle part of the metering hopper cover plate (3) is provided with a through hole that passes through the upper and lower sides of the metering hopper cover plate (3). A conduit (4) that communicates with the through hole is fixed on the metering hopper cover plate (3). The conduit (4) is fixed with a conduit connector (5) and communicates with the outlet of the second one-way valve (15) through the conduit connector (5). The second solenoid valve (15) is connected to a high-pressure gas source through a gas pipe. The cylinder (13) is installed on the outside of the medicine box (1). The piston rod end of the cylinder (13) is fixedly connected to the conduit connector (5) and is coaxially arranged with the conduit (4). The piston rod of the cylinder (13) is linked with the metering hopper cover plate (3) through the conduit (4). The outlet of the metering hopper (2) is connected to the second one-way valve (15) through the metering hopper cover plate (3), the conduit (4), and the conduit connector (5). The cylinder (13) presses the metering hopper cover plate (3) to achieve sealing. High pressure gas forces the medicine to spray out at high speed to complete the dosing. The metering hopper (2) is also filled with a float (8) with a diameter larger than that of the outlet of the metering hopper (2). The density of the float (8) is less than that of the medicine. The maximum lifting displacement of the metering hopper cover plate (3) is less than that of the float (8).

2. The air-jet dosing machine as described in claim 1, characterized in that, The inner diameter of the cylinder (13) is larger than the inner diameter of the metering hopper (2).

3. The air-jet dosing machine as described in claim 1, characterized in that, The bottom of the medicine box (1) is provided with a mounting base that can cooperate with the metering hopper (2). A sealing ring is provided between the mounting base and the metering hopper (2). The metering hopper (2) is sealed and installed in the mounting base at the bottom of the medicine box (1).

4. The air-jet dosing machine as described in claim 1, characterized in that, The inlet of the metering hopper (2) is flush with the bottom of the medicine box (1).

5. The air-jet dosing machine as described in claim 1, characterized in that, The lower end of the measuring bucket (2) has an inverted conical inner cavity.

6. The air-jet dosing machine as described in claim 1, characterized in that, The metering hopper cover plate (3) is provided with a sealing gasket corresponding to the inlet of the metering hopper (2) on its lower side. The metering hopper cover plate (3) achieves sealing by fitting the sealing gasket with the edge of the inlet of the metering hopper (2).

7. The air-jet dosing machine as described in claim 1, characterized in that, The medicine box (1) is also provided with a limiting plate (6), and the limiting plate (6) is provided with a guide hole that matches the size of the catheter (4), and the catheter (4) is slidably inserted into the guide hole.

Images