Intelligent two-phase flow tube mill

Abstract

An intelligent two-phase flow tube mill comprises a cylinder, a transmission gear is arranged on the cylinder, a feeding device is arranged at the front entrance of the cylinder, and a discharging device is arranged at the rear exit, a plurality of partition assembly devices are installed inside the cylinder, the partition assembly device divides the cylinder into a plurality of chambers, the partition assembly device is composed of a partition plate and a strip grid screen plate, and the strip grid screen plate is located at the front end of the partition plate; the partition plate is a solid annular plate with a through hole in the middle; wind pressure sensors are installed at the front and rear ends of the cylinder. The present invention changes the structure of the partition plate to improve the fineness and output of the grinding material of the tube mill while achieving the purpose of energy saving and consumption reduction.

Description

Technical Field

[0001] The invention belongs to the field of tube mill equipment, in particular to an intelligent two-phase flow tube mill. Background Art

[0002] Tube mill is a kind of continuous and efficient crushing mechanical equipment, which is suitable for grinding non-ferrous metal beneficiation, building materials and chemical cement, glass and ceramics and other production industries. At present, the structure of tube mill is generally that transmission gears are fixed on both sides of the cylinder, and then the driving gear meshing with the transmission gear is driven by the motor to realize the rotation of the cylinder of the tube mill. A fan is provided at the entrance of the cylinder and several partition plates are arranged in the cylinder to divide the internal space of the cylinder into several chambers. The chamber is loaded with steel balls or steel forgings, and then the materials are ground and blown out of the chamber by the fan, finally achieving the purpose of crushing the materials. However, the traditional tube mill divides the cylinder into multiple chambers. In actual application, it is found that only 2-3 chambers have a good grinding effect. No matter how many chambers are divided, they cannot play a corresponding role. In addition, the traditional partition plates have problems such as uneven ventilation, no separation of air and materials, and easy clogging of the grate seams, resulting in insufficient utilization of the chambers. The reason for these problems is that the partition plates of traditional tube mills are all equipped with grates or grilles, so that the wind blown by the fan can pass smoothly through the grates of the partition plates. However, in actual applications, it is often found that the grates of the partition plates are easily blocked, resulting in uneven ventilation, and the materials ground by the partition plates with grates are not fine enough. The existing tube mills are designed only to consider the solid phase movement of steel balls or steel forgings in the tube mill, and the movement of materials from the front end of the tube mill to the rear end is all driven by the wind of the fan. Summary of the invention

[0003] The purpose of the present invention is to overcome the problems existing in the prior art and to propose an intelligent two-phase flow tube mill which realizes finer grinding by designing the partition plate as an annular solid plate and further utilizing the Bernoulli principle.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions. The intelligent two-phase flow tube mill proposed in the present invention includes a cylinder, a transmission gear is provided on the cylinder, a feeding device is provided at the front entrance of the cylinder, and a discharging device is provided at the rear exit. A plurality of partition assembly devices are installed inside the cylinder, and the partition assembly device divides the cylinder into a plurality of chambers. The partition assembly device is composed of a partition plate and a strip grid sieve plate, and the strip grid sieve plate is located at the front end of the partition plate; the partition plate is an annular solid plate with a through hole in the middle. Wind pressure sensors are installed at the front and rear ends of the cylinder, and the wind pressure sensors are also connected to the fan control box.

[0005] In order to achieve the above objectives, the present invention also adopts the following technical measures to further achieve the above objectives.

[0006] Furthermore, the partition plate is an annular solid plate formed by splicing a plurality of fan-shaped plates.

[0007] Furthermore, the spacing between the strip slits of the strip grid screen plate arranged from the front end to the rear end of the cylinder gradually decreases.

[0008] Furthermore, the compartment assembly devices are provided with 4-7 and divide the interior of the cylinder into 5-8 compartments.

[0009] Furthermore, the distance between two adjacent compartment assembly devices is 250mm-5500mm.

[0010] Furthermore, the strip slit spacing of the strip grid sieve plate is 0.1mm-100mm.

[0011] Furthermore, the strip width of the strip grid sieve plate is 10 mm-100 mm.

[0012] Furthermore, the height of the partition plate is 100mm-1600mm.

[0013] The partition plate of the intelligent two-phase flow tube mill proposed by the present invention adopts a ring-shaped solid plate, and the material and wind can only pass through the middle of the partition plate. Further using the Bernoulli principle, since the partition plate is a solid plate, the wind cannot pass through the plate body of the partition plate. In addition, since the cross-sectional area of ​​the air inlet of the tube mill is small, the wind speed is fast and the pressure is low, while the cross-sectional area of ​​the chamber part is large, the wind speed is slow and the pressure is high, so a pressure difference will be generated, and the wind at the high pressure will flow to the low pressure, and finally a circulating vortex will be formed in the chamber. For the same reason, the through-hole cross-sectional area of ​​the partition plate is small and the cross-sectional area inside the chamber is large, so each chamber can generate a circulating vortex. The necessary condition for generating a circulating vortex is that the partition plate is solid and has no grate seams, otherwise the wind will enter other chambers through the grate seams of the partition plate and cannot form a vortex. The effect of the circulating vortex can make the wind and material circulate continuously in the chamber for repeated grinding until the material is ground into fine powder before it can leave the chamber and enter the next chamber. Furthermore, the present invention designs a strip grid screen plate used in conjunction with the partition plate, which can not only isolate steel balls or steel forgings to prevent them from being intertwined, but also isolate large and small materials, and has the functions of uniform ventilation and anti-blocking. In addition, the present invention adds a wind pressure sensor to control the wind speed inside the cylinder, thereby increasing or decreasing the intensity of the circulating eddy currents in each chamber, thereby lengthening or shortening the material grinding time, and even grinding out ultrafine powders and nanometer powders. Therefore, the present invention can grind the material finer by using the eddy current, thereby achieving the purpose of energy saving and consumption reduction.

[0014] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the intelligent two-phase flow tube mill of the present invention.

[0016] Figure 2 It is a structural schematic diagram of the partition board in the present invention.

[0017] Figure 3 It is a structural schematic diagram of the strip grid sieve plate in the present invention.

[0018] Figure 4 It is a schematic diagram of the installation position of the wind pressure sensor in the present invention.

[0019] Figure 5 It is a schematic diagram of the flow direction principle of the airflow in the intelligent two-phase flow tube mill of the present invention.

[0020]

Main component symbol description

[0021] 1: Cylinder

[0022] 2: Feeding device

[0023] 3: Discharging device

[0024] 4: Support frame

[0025] 5: compartment assembly device 51: compartment plate 52: strip grid plate 53: through hole 510: fan-shaped plate

[0026] 6: Wind pressure sensor DETAILED DESCRIPTION

[0027] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0028] See also Figure 1 , Figure 4 The present invention discloses an intelligent two-phase flow tube mill, comprising a cylinder 1, a feeding device 2, a discharging device 3, a support frame 4, a compartment assembly device 5, and a wind pressure sensor 6. The feeding device 2 is installed at the front entrance of the cylinder 1, and the discharging device 3 is installed at the rear exit of the cylinder 1. The bottom of the feeding device 2 and the discharging device 3 is installed with a support frame 4, and the support frame 4 is used to support the feeding and discharging devices. Transmission gears are installed on both sides of the cylinder 1, and the rotation of the cylinder is realized by the motor drive.

[0029] The partition assembly device 5 is installed in the cylinder 1. The partition assembly device 5 is provided with 1-10 and divides the cylinder 1 into 2-11 chambers. The partition assembly device 5 includes a partition plate 51 and a strip grid screen plate 52. The strip grid plate 52 is located at the front end of the partition plate 51 and is parallel to each other along the flow direction of wind or material. The outer ring surface of the strip grid plate 52 is fixedly connected to the inner surface of the cylinder 1.

[0030] See also Figure 2 The partition plate 51 is a solid annular plate with a through hole 53 in the middle, which is formed by splicing a plurality of fan-shaped plates 510. The fan-shaped plates 510 are solid plates and two adjacent fan-shaped plates 510 are fixedly connected by a center plate. The arc top of each fan-shaped plate 510 is welded and fixed to the inner surface of the cylinder 1. The present invention has four fan-shaped plates 510, but the present invention is not limited thereto.

[0031] See also Figure 4 The front end and the rear end of the cylinder 1 are both equipped with wind pressure sensors 6, which are connected to the fan control box. On the one hand, they are used to monitor the wind pressure passing through the cylinder 1, and on the other hand, the wind speed passing through the cylinder 1 can be adjusted through the fan control box.

[0032] Preferably, the spacing between the strip slits of the strip grid screen plates 52 provided from the first chamber to the last chamber of the cylinder 1 gradually decreases.

[0033] Preferably, the partition plate assembly devices 5 are provided with 4-7 and divide the interior of the cylinder 1 into 5-8 chambers.

[0034] Preferably, the distance between two adjacent compartment assembly devices 5 is 250 mm-5500 mm.

[0035] Preferably, the strip slit spacing of the strip grid sieve plate 52 is 0.1 mm-100 mm.

[0036] Preferably, the width of the strips of the strip grid sieve plate is 10 mm-100 mm.

[0037] Preferably, the height of the partition plate 51 is 100 mm-1600 mm.

[0038] The above embodiments are merely preferred embodiments of the present invention, but the present invention is not limited thereto.

[0039] Principle and working process of the present invention:

[0040] The grinding body moves in the solid phase in the cylinder of the tube mill, while the material moves in the gas phase in the cylinder under the action of wind. The material moves in the cylinder by the wind. The partition plate of the two-phase flow partition device of the present invention adopts an annular solid plate, and the material and wind can only pass through the through hole in the middle of the partition plate, using the "Bernuke principle": the flow rate is fast and the pressure is low in the place with a small cross-sectional area, and the flow rate is slow and the pressure is high in the place with a large cross-sectional area.

[0041] When the wind and materials are transported to the feed port through the feeding device, the wind brings the materials into the cylinder. Since the partition plate on the partition assembly device has a through hole in the middle and a fan-shaped solid plate around it, the wind and materials can only enter the next bin through the central through hole of the partition plate. The cross-sectional area of ​​the middle through hole of the feed port and the two-phase flow partition assembly device is small, and the wind speed is fast and the pressure is low; while the cross-sectional area of ​​the chamber is large, the wind speed in the chamber is slow and the pressure is high, so a pressure difference is formed in the chamber, and the wind at the high pressure will flow to the low pressure, and finally a circulating vortex will be formed in the chamber. The material entering the chamber is drawn into the circulating vortex by the wind. The vortex is a whirlwind, which blows from the rear end to the front end. The material will continue to rotate with the rotating vortex, and contact, collide and grind with the grinding body during the rotation. When the material is large particles, the eddy current cannot blow the material into the next bin due to its large weight. In this way, the material is repeatedly circulated and ground in the eddy current. When the material is ground to a certain fineness (the gravity of the material itself is less than the wind force), it can be blown into the next bin by the eddy current wind. Since the wind force of the front bin blown in from the feed port is always greater than the wind force of the rear bin and each partition board is solid and has a through hole in the middle without grate seams, eddy currents can be generated in each bin. Therefore, the material entering the next bin will continue to enter the circulating eddy current of the bin and circulate and grind until the fineness of the material reaches the weight to be blown into the next bin, and then it will be brought into the next bin by the eddy current wind. This cycle will continue until the material reaches the required fineness and then it will be brought out of the cylinder 1 by the wind and discharged through the discharging device.

[0042] Since the center of the partition plate is a through hole, the intelligent two-phase flow tube mill is always in a rotating state during the working process. The materials or grinding bodies in the front bin will inevitably be thrown into the rear bin from the through hole of the partition plate in the rotating cylinder. Therefore, a strip grid screen plate is installed at the front end of the partition plate. On the one hand, it is used to prevent the grinding bodies or materials in the front bin from entering the rear bin and causing bin congestion, and on the other hand, it is used to filter the ground materials. Since the spacing between the strip grid screen plates set from the first bin to the last bin gradually decreases, that is, the distance between the two adjacent strips on the strip grid screen plate installed in the front bin is always greater than the distance between the two adjacent strips on the strip grid screen plate installed in the rear bin, the material can still be blocked by the strip grid screen plate in the next bin after entering it.

[0043] The present invention can also install wind pressure sensors at the front and rear ends of the cylinder, and the wind pressure sensors are also connected to the fan control box. The wind pressure sensors can monitor the wind pressure passing through the tube mill in real time on the one hand, and can adjust the wind speed passing through the tube mill according to the required fineness of the material on the other hand. When a material with a higher fineness needs to be ground, the wind pressure sensor sends a signal to the regulating mechanism in the fan control box to respond and adjust the wind force higher. On the contrary, when the material with a lower fineness needs to be ground, the wind pressure sensor sends a signal to the regulating mechanism in the fan control box to respond and adjust the wind force lower. By controlling the wind speed in the cylinder, the circulating eddy current intensity of each bin can be increased or decreased, that is, the material grinding time is increased or shortened, and the required fineness of the material can be ground, and ultrafine powder and nano powder can also be ground.

[0044] The grinding body of the present invention can also adopt ceramic balls, which can greatly save energy consumption.

[0045] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Those skilled in the art can make various modifications or supplements or replace them in similar ways on the basis of the present invention, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all belong to the protection scope of the present invention.

Claims

1. An intelligent two-phase flow tube mill, comprising a cylinder (1), the cylinder (1) being provided with a transmission gear, a feeding device (2) being provided at a front entrance of the cylinder (1), and a discharging device (3) being provided at a rear exit, wherein: A plurality of compartment assembly devices (5) are installed inside the cylinder (1), and the compartment assembly devices (5) divide the cylinder (1) into a plurality of compartments. The compartment assembly devices (5) are composed of a compartment plate (51) and a strip grid screen plate (52), and the strip grid screen plate (52) is located at the front end of the compartment plate (51); The partition plate (51) is an annular solid plate with a through hole (53) in the middle, and the partition plate (51) is an annular solid plate formed by splicing a plurality of fan-shaped plates (510); wind pressure sensors (6) are installed at the front and rear ends of the cylinder (1); the slit spacing of the strip-shaped grid screen plate (52) arranged from the front to the rear end of the cylinder (1) gradually decreases; The working process of the intelligent two-phase flow tube mill is as follows: when wind and material are transported to the feed port through the feeding device, the material is brought into the cylinder by the wind, and a circulating vortex is formed in each chamber of the cylinder. The wind and material can only enter the next chamber through the central through hole of the partition plate. The material entering the chamber is drawn into the circulating vortex by the wind, and the material will continue to rotate with the circulating vortex. In the process of continuous rotation with the circulating vortex, the material contacts and collides with the grinding body, and the grinding cycle is repeated until the material fineness reaches the weight to be blown into the next chamber. The material will be brought into the next chamber by the vortex wind through the central through hole of the partition plate, and the cycle will continue until the material reaches the required fineness and is then carried out of the cylinder by the wind.

2. The intelligent two-phase flow tube mill according to claim 1, characterized in that: The compartment assembly devices (5) are provided in 4 to 7 numbers and divide the interior of the cylinder (1) into 5 to 8 compartments.

3. The intelligent two-phase flow tube mill according to claim 1 is characterized in that: The distance between two adjacent compartment assembly devices (5) is 250 mm-5500 mm.

4. The intelligent two-phase flow tube mill according to claim 1 is characterized in that: The strip slit spacing of the strip-shaped grid screen plate (52) is 0.1 mm to 100 mm.

5. The intelligent two-phase flow tube mill according to claim 1, characterized in that: The strip width of the strip grid sieve plate (52) is 10 mm to 100 mm.

6. The intelligent two-phase flow tube mill according to claim 1, characterized in that: The height of the partition plate (51) is 100 mm-1600 mm.

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