Flow stabilizing bin of raw material grinding roller press

Abstract

The invention relates to a steady flow bin of a raw material grinding roller press, and relates to the technical field of cement production devices.The steady flow bin comprises a feeding bin, a discharging bin, a material distribution table, a material distributor and a material distribution motor, the feeding bin is a cylindrical round bin, a cover plate is installed at the top of the feeding bin, and a feeding port is formed in the middle of the cover plate; an opening in the top of the discharging bin is connected with an opening in the bottom of the feeding bin, the inner wall of the discharging bin is evenly and alternately covered with fixing rings and rotating rings, the distribution table is installed below the opening in the bottom of the guide cylinder through supporting rods at intervals, and the distributor and the distribution motor are installed on the distribution table. The problems of segregation caused by poor material uniformity and crust caused by moisture in the cement raw material flow stabilization process of a traditional flow stabilization bin can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of cement production devices, and in particular to a flow stabilizing bin of a raw material grinding roller press. Background Art

[0002] In the cement production process, raw material grinding is to crush and finely grind raw materials such as limestone, clay, iron ore, etc. to achieve a certain fineness and uniformity to form raw materials suitable for calcination. The quality of raw materials directly affects the quality and production efficiency of cement clinker. In order to ensure the uniformity and continuous supply of raw materials, the steady flow bin becomes an important device to connect the roller press, store and transport raw materials.

[0003] The main function of the flow stabilization bin is to store materials from upstream equipment for a short period of time, and to adjust and buffer the material flow through the structure of the bin and the internal fluidization design, so as to achieve uniform and stable material transportation and provide suitable material conditions for subsequent roller press grinding. Therefore, the effective operation of the flow stabilization bin is the key to ensuring the efficient and stable operation of the grinding system.

[0004] Cement raw material is the core raw material for cement production. It is mainly made by mixing limestone, clay, iron ore and other raw materials in a certain proportion, and then crushing and grinding them. Cement raw material is usually in the form of fine powder or granules. Its particle size distribution and moisture content directly affect its fluidity, dispersibility and grinding efficiency.

[0005] The traditional flow stabilizing bin, as the connecting equipment of cement raw material roller press, has the following defects in use: First, the high moisture content of cement raw materials leads to crusting in the silo: The moisture content of cement raw materials is often high, and the inner wall of the traditional steady flow silo is prone to crusting due to the adhesion of moisture of the material. These crusts not only reduce the effective volume of the silo, but also hinder the normal flow of materials, leading to problems such as silo blockage and silo deviation, which seriously affects the operation efficiency of the steady flow silo; The second is the segregation problem caused by the unevenness of cement raw materials and uneven feeding: the composition and particle distribution of cement raw materials may change with time and the source of feed, and the traditional steady flow bin has a weak ability to adjust these fluctuations. When the material particles are uneven, it is easy to form stratification or segregation in the bin, resulting in poor material uniformity during discharge, affecting the grinding quality of the subsequent roller press. Moreover, the feeding method of traditional steady flow bins mostly adopts gravity or belt conveyor to directly feed the materials, while the feed in the steady flow bin of cement raw materials not only contains cement raw materials, but also often includes V-selection return powder and return powder of high-efficiency powder selector. Different materials will also produce stratification and segregation when entering the bin due to differences in flow rate or particle grading. Larger particles and finer particles are respectively gathered in different areas, further reducing the uniformity of the discharge and increasing the volatility of the production process.

[0006] The above problems not only affect the material conveying quality, but also reduce the operating efficiency and reliability of the steady flow bin. Therefore, the present application proposes a steady flow bin of a raw material grinding roller press. Summary of the invention

[0007] In order to overcome the problems in the background technology, the purpose of the present invention is to provide a stabilizing bin for a raw material grinding roller press to solve the problems of poor material uniformity leading to segregation and skinning caused by moisture in the traditional stabilizing bin during the stabilizing process of cement raw materials.

[0008] A flow stabilizing bin of a raw material grinding roller press comprises a feed bin, a discharge bin, a distribution platform, a distribution device and a distribution motor, wherein the feed bin is a cylindrical round bin, a cover plate is installed on the top of the feed bin, a feed port is opened in the middle of the cover plate, and a guide tube is installed at the bottom of the feed port; The material distribution table is a round table, and the material distribution table is coaxially installed in the feed bin below the guide cylinder through a support rod; The distributor includes a central shaft and a dragon blade, wherein the central shaft is coaxially mounted on the distribution platform through a bearing mounted on the distribution platform housing, the central shaft above the distribution platform extends into the guide tube, and the dragon blade is mounted on the central shaft in the guide tube; The material distribution motor is installed in the housing of the material distribution platform, and the power output end of the material distribution motor is connected to the sprocket on the central shaft through a chain transmission; The discharging bin is a conical round bin, the opening at the top of the discharging bin is connected and installed with the opening at the bottom of the feeding bin, a discharging port is arranged at the bottom of the discharging bin, the central axis under the material distribution table extends into the discharging port, fixed rings are evenly installed on the inner wall of the discharging bin, rotating rings are evenly installed between the intervals of the fixed rings, and an extension piece is installed on the central axis under the material distribution table to connect the rotating rings.

[0009] Furthermore, a cyclone separator is installed on the feed port, and the outlet at the bottom of the cyclone separator extends to the upper and middle part of the guide tube. Symmetrical feed port 1 and feed port 2 are tangentially arranged on the side wall at the top of the cyclone separator, and booster fans are installed on feed port 1 and feed port 2.

[0010] Furthermore, the top end of the central shaft is arranged below the outlet of the cyclone separator, and an umbrella-shaped bulk material tray is installed on the top end of the central shaft.

[0011] Furthermore, the surface of the material distribution table is evenly provided with material removal rods connected to the central axis.

[0012] Furthermore, a distribution chute is connected to the bottom flange of the discharge port, and the cross-section of the distribution chute along the axial direction of the tube body gradually transitions from a circular shape at the top to an elliptical shape at the bottom, and the long axis length of the elliptical pipe opening at the bottom of the distribution chute is greater than the diameter of the circular pipe opening at the top of the distribution chute, and the short axis length of the elliptical pipe opening is less than the diameter of the circular pipe opening at the top of the distribution chute.

[0013] The beneficial effects of the present invention are: The present application improves the traditional steady flow bin by adding a distributor inside the bin body, and evenly and alternately covers the inner wall of the discharge bin with a fixed ring and a rotating ring. The rotating ring rotates slowly under the drive of the distributor, thereby increasing the fluidity of the wall-adhering material and solving the problem of raw material adhesion and crusting. A guide tube and a cyclone separator are added above the distribution table. The raw material and the return powder removed by the cyclone separator are evenly mixed in the guide tube and then evenly transported to the distribution table for distribution through the distributor, thereby solving the problems of unevenness of cement raw material and segregation caused by uneven feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for describing the embodiments are described below.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 4 It is a schematic diagram of the warehouse structure of the present invention; Figure 5 It is a schematic diagram of the structure of the distributor of the present invention; Figure 6 It is a schematic diagram of the top view of the structure of the present invention; Figure 7 It is a bottom view structural schematic diagram of the present invention.

[0016] 1-feeding bin, 11-cover plate, 12-feeding port, 13-guide tube, 2-discharging bin, 21-discharging port, 22-fixing ring, 23-rotating ring, 3-distributing table, 31-support rod, 32-displacing rod, 4-distributor, 41-center axis, 42-auger blade, 43-connecting rod, 44-bulk material tray, 5-distributing motor, 6-cyclone separator, 61-feeding port 1, 62-feeding port 2, 7-distributing chute. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the preferred embodiments of the present invention are described in detail below to facilitate understanding by technicians.

[0018] A flow stabilizing chamber of a raw material grinding roller press, see Figure 1-2, including a feed bin 1, a discharge bin 2, a distribution platform 3, a distributor 4 and a distribution motor 5. The feed bin 1 is a cylindrical round bin, and the raw material has good flow distribution in the bin, and it is not easy to have material accumulation problems. A cover plate 11 is installed on the top of the feed bin 1, and a feed port 12 is opened in the middle of the cover plate. A guide tube 13 is installed at the bottom of the feed port 12. The raw material can be added through the feed port 12, and the raw material is transported to the feed bin 1 through the guide tube 13; The material distribution platform 3 is a truncated platform, and the outer circumference of the material distribution platform 3 is provided with a chamfer to form a slope for easy material discharge. The material distribution platform 3 is coaxially installed in the feed bin 1 below the guide cylinder 13 through a support rod 31. The material distribution platform 3 and the guide cylinder 13 are installed at a certain distance. The raw material coming out of the guide cylinder 13 falls to the material distribution platform 3, and the material forms a natural accumulation on the material distribution platform 3. The overflowed material is evenly scattered to the discharge bin 2 to achieve uniform material distribution. The distributor 4 includes a central shaft 41 and auger blades 42. The central shaft 41 is coaxially mounted on the distribution platform 3 through a bearing mounted on the housing of the distribution platform 3, and is a transmission structure of the uniform distribution mechanism in the bin. The central shaft 41 above the distribution platform 3 extends into the guide tube 13, and the auger blades 42 are mounted on the central shaft 41 in the guide tube 13, which can mix the raw materials and solve the problem of unevenness of the cement raw materials. The material distribution motor 5 is installed in the housing of the material distribution platform 3, and the power output end of the material distribution motor 5 is connected to the sprocket on the central shaft 41 through a chain transmission, driving the rotating ring 23 and the auger blade 42 to rotate; The discharge bin 2 is a conical round bin, which is convenient for unloading raw materials. The opening at the top of the discharge bin 2 is connected and installed with the bottom opening of the feed bin 1. A discharge port 21 is arranged at the bottom of the discharge bin 2, which can feed the raw materials stored in the feed bin 1 into the roller press. The central axis 41 under the distribution table 3 extends into the discharge port 21 to avoid material accumulation at the discharge port 21. Fixed rings 22 are evenly installed on the inner wall of the discharge bin 2, and rotating rings 23 are evenly installed between the intervals of the fixed rings 22. Extensions 43 are installed on the central axis 41 under the distribution table 3 to connect the rotating rings 23. The rotating rings 23 can rotate slowly under the drive of the distributor 4, thereby increasing the fluidity of the sticky material and avoiding the raw material from sticking to the wall for a long time and forming a skin.

[0019] See also Figure 1-7 A cyclone separator 6 is installed on the feed port 12, and the outlet at the bottom of the cyclone separator 6 extends to the upper and middle part of the guide tube 13. A symmetrical feed port 1 61 and a feed port 2 62 are tangentially arranged on the side wall at the top of the cyclone separator 6. A booster fan is installed on the feed port 1 61 and the feed port 2 62, which can be connected to the return powder pipeline of the V-selection powder machine and the high-efficiency powder selector respectively, to screen out the particulate material and recover the dust at the same time, so as to avoid the dust from affecting the uniformity and pressure of the material in the bin.

[0020] See also Figure 1-7The top of the central axis 41 above the material distribution platform 3 is arranged below the outlet at the bottom of the cyclone separator 6, and an umbrella-shaped bulk material tray 44 is installed on the top of the central axis 41, which can make the separated materials spread evenly.

[0021] See also Figure 2 , 3 5. The surface of the material distribution table 3 is evenly provided with a material removing rod 32 connected with the central axis 41. The length of the material removing rod 32 is greater than the platform radius of the material distribution table 3. The material removing rod 32 can rotate slowly under the drive of the material distributor 4 to avoid the height difference caused by the crusting of the surface of the material distribution table 3 and affecting the uniformity of the material distribution. At the same time, the material removing rod 32 can also remove the residual material when there is residual material on the material distributor 4 to avoid manual cleaning.

[0022] See also Figure 1-7 The bottom flange of the discharge port 21 is connected with a material distribution chute 7. The cross-section of the material distribution chute 7 gradually transitions from a circular shape at the top to an elliptical shape at the bottom along the axial direction of the tube body, and the major axis length of the elliptical pipe opening at the bottom of the material distribution chute 7 is greater than the diameter of the circular pipe opening at the top of the material distribution chute 7, and the minor axis length of the elliptical pipe opening is less than the diameter of the circular pipe opening at the top of the material distribution chute 7, so that the feeding amount in the middle part of the roller of the roller press is the largest and is reduced along the two sides, providing a stable material pressure for the roller press.

[0023] Working process: The return powder pipelines of the V-selected powder and the high-efficiency powder classifier are connected to the feed port 1 61 and the feed port 2 62, and the distribution motor 5 is started. When the steady flow bin is feeding the roller press, the distribution motor 5 drives the central shaft 41 to rotate slowly, and the raw material is added to the guide tube 13 through the feed port 12. The auger blades 42 mix the raw material with the return powder of the V-selected powder and the return powder of the high-efficiency powder classifier and convey them to the distribution table 3 in the feed bin 1. The materials form a natural accumulation on the baffle plate, and the overflowed materials are evenly scattered to the discharge bin 2. When the materials pass through the bin wall of the discharge bin 2, the distribution device 4 drives the rotating ring 23 to rotate slowly, so that the fluidity is increased, and the raw material that is difficult to adhere to the wall of the discharge bin 2 for a long time appears crusting, and the raw material flows to the discharge port 21 of the discharge bin 2, and is conveyed to the rollers along the width of the roller shaft by the distribution chute 7 for roller pressing.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A flow stabilizing bin of a raw material grinding roller press, characterized in that: It comprises a feed bin (1), a discharge bin (2), a distribution platform (3), a distribution device (4) and a distribution motor (5), wherein the feed bin (1) is a cylindrical round bin, a cover plate (11) is installed on the top of the feed bin (1), a feed opening (12) is opened in the middle of the cover plate, and a guide tube (13) is installed at the bottom of the feed opening (12); The material distribution platform (3) is a round platform, and the material distribution platform (3) is coaxially mounted in the feed bin (1) below the guide cylinder via a support rod (31); The distributor (4) comprises a central shaft (41) and auger blades (42); the central shaft (41) is coaxially mounted on the distribution platform (3) via a bearing mounted on a housing of the distribution platform (3); the central shaft (41) above the distribution platform (3) extends into the guide tube (13); and the auger blades (42) are mounted on the central shaft (41) in the guide tube (13); The material distribution motor (5) is installed in the housing of the material distribution platform (3), and the power output end of the material distribution motor (5) is connected to the sprocket on the central shaft (41) through a chain transmission; The discharge bin (2) is a conical round bin, the top opening of the discharge bin (2) is connected to the bottom opening of the feed bin (1), a discharge port (21) is provided at the bottom of the discharge bin (2), a central axis (41) below the material distribution platform (3) extends into the discharge port (21), fixed rings (22) are evenly spaced on the inner wall of the discharge bin (2), rotating rings (23) are evenly spaced between the fixed rings (22), and an extension piece (43) is installed on the central axis (41) below the material distribution platform (3) to connect the rotating rings (23).

2. The flow stabilizing bin of the raw material grinding roller press according to claim 1, characterized in that: A cyclone separator (6) is installed on the feed port (12), and the outlet at the bottom of the cyclone separator (6) extends to the middle and upper part of the guide tube (13). A symmetrical feed port 1 (61) and a feed port 2 (62) are tangentially arranged on the side wall at the top of the cyclone separator (6), and booster fans are installed on the feed port 1 (61) and the feed port 2 (62).

3. The flow stabilizing bin of the raw material grinding roller press according to claim 2, characterized in that: The top end of the central shaft (41) is arranged below the outlet of the cyclone separator (6), and an umbrella-shaped bulk material tray (44) is installed on the top end of the central shaft (41).

4. The flow stabilizing bin of the raw material grinding roller press according to claim 1, characterized in that: The material distribution table (3) is evenly provided with material shifting rods (32) connected to the central axis (41) on the table surface.

5. The flow stabilizing bin of the raw material grinding roller press according to claim 1, characterized in that: The bottom flange of the material discharging port (21) is connected to a material distribution chute (7), and the cross section of the material distribution chute (7) along the axial direction of the tube body gradually transitions from a circular shape at the top to an elliptical shape at the bottom, and the length of the major axis of the elliptical pipe opening at the bottom of the material distribution chute (7) is greater than the diameter of the circular pipe opening at the top of the material distribution chute (7), and the length of the minor axis of the elliptical pipe opening is less than the diameter of the circular pipe opening at the top of the material distribution chute (7).

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