Ball-free grinding and automatic cleaning mud slurry grinding machine

Abstract

The present invention relates to a ball-free, automatic-cleaning mud slurry grinding machine. The mud slurry grinding machine comprises a grinding machine barrel, a feed inlet, a slurry outlet, a slurry outlet flange, a reducer, a motor, a transmission belt, a stirring frame, a cleaning plate, and an electrical control system. The feed inlet and the slurry outlet are welded and fixed on both sides of the grinding machine barrel, respectively. The slurry outlet flange is connected to the slurry outlet and is trumpet-shaped with a gap of 5 to 10 mm. The reducer is connected to the motor via a flange. The reducer and the motor output shaft are coaxial. The reducer and the motor are fixed to a fixed seat via bolts. A transmission belt connects the reducer pulley to the pulley of the grinding machine barrel to realize belt transmission. The stirring frame is welded to the inner wall of the grinding machine barrel. One end of the cleaning plate is welded to the inner wall of the grinding machine barrel at the slurry outlet, and the other end abuts the slurry outlet flange.

Description

Technical Field

[0001] The invention belongs to the technical field of ceramics, and in particular relates to a mud material slurry grinding machine which does not require ball stone grinding and can automatically clean organic matter. Background Art

[0002] Blank preparation is a key link in the entire ceramic production process, and is also the main energy-consuming and cost-intensive link in ceramic production. The primary process in blank preparation is raw material grinding and slurrying. In order to improve slurry preparation efficiency and reduce energy consumption, practitioners in the building ceramics industry have continuously improved the process and upgraded the equipment for slurry ball milling. Slurry preparation has also evolved from the initial intermittent ball milling to the current hybrid ball milling that combines intermittent ball milling with continuous ball milling. In recent years, in order to further improve the efficiency of slurry preparation, leading domestic ceramic companies have improved the grinding process of ceramic materials, grinding and pulverizing the hard and soft materials before entering the ball mill, and pre-processing them with ball milling slurry, and then mixing them for grinding and preparation. This method of pre-treating and then ball milling ceramic raw materials effectively improves the high energy consumption and low efficiency of slurry ball milling, and achieves good production and application effects.

[0003] Clay slurrying involves weighing and proportioning various soft materials, such as clay and clay paste, and then feeding them into a ball mill with additives and water in a certain proportion. Traditional clay slurrying ball mills use ball stones to grind and crush soft materials. The slurry, ground to a certain fineness, is then transported to a slurry pool for use in continuous ball milling processes. This method consumes a large amount of ball stones. Furthermore, the clay and clay paste contain debris such as tree roots and plastic, which the ball mill cannot separate from the slurry in a timely manner. Organic matter is ground into powder in the ball mill and mixed into the slurry. After spray drying, pressing and high-temperature firing, a large number of impurities, pits and other defects are formed in the finished tiles, affecting the product quality rate and making it difficult to meet the company's requirements for continuous and stable production. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, the present invention provides a mud pulping grinder and control method that can adapt to soft ceramic materials of different sizes, can realize continuous crushing and slurrying of mud materials and timely screening of unusable impurities without adding ball milling media, has a simple structure and is easy to operate, does not require ball stone grinding, and automatically cleans organic matter.

[0005] The technical solution of the present invention is the mud slurry grinder with ball-free grinding and automatic cleaning. Its special feature is that it includes a grinder cylinder, a feed port, a slurry outlet, a motor, a transmission belt, and an electrical control system; the feed port and the slurry outlet are respectively welded and fixed on both sides of the grinder cylinder, and the transmission belt connects the pulley of the reducer and the pulley of the grinder cylinder to realize belt drive; it is characterized in that it also includes a slurry outlet flange, a reducer, a stirring frame and a cleaning plate; the slurry outlet flange is connected to the slurry outlet, the slurry outlet flange is trumpet-shaped, and has a gap of 5 to 10 mm; the reducer is connected to the motor through a flange, the reducer and the motor output shaft are coaxial, the reducer and the motor are fixed on the fixed seat by bolts, and the stirring bracket is welded to the inner wall of the grinder cylinder; one end of the cleaning plate is welded to the inner wall of the grinder cylinder at the slurry outlet, and the other end abuts the slurry outlet flange.

[0006] Preferably, the inner wall of the grinding machine cylinder is welded with stirring racks, which are arranged in groups of three and evenly distributed within a 360-degree circumference of the inner wall of the grinding machine cylinder. The welding surface of the stirring rack is curved into an arc, which is cocentric with the grinding machine cylinder and has the same diameter. A total of four groups of stirring racks are arranged on the inner wall of the grinding machine cylinder, and the stirring racks are composed of rubber wear-resistant parts and stainless steel metal brackets; the rubber wear-resistant parts are fixed to the stainless steel metal brackets by bolts, and the stainless steel metal brackets are welded to the inner wall of the grinding machine cylinder.

[0007] Preferably, the cleaning plate is in an arc shape and twisted 45 to 80 degrees in the X-axis direction. Three 100 mm high baffles are provided on the cleaning plate, which are respectively located on the left and right sides and the lower end of the cleaning plate. The cleaning plate is fixed on the inner wall of the grinding machine cylinder and there is no baffle at one end. The setting of the baffle is conducive to the collection of debris. The length of the baffle of the cleaning plate near the slurry outlet is half of the baffle on the side of the grinding machine cylinder, which is convenient for sending debris into the discharge flange. A number of 5 to 10 mm wide gaps are also provided on the cleaning plate to facilitate the passage of mud.

[0008] Preferably: the inverter of the electrical control system selects a heavy-load series inverter and adopts the following vector control mode; the inverter is connected to the PLC using the RS485 bus and adopts the MODBUS-RTU protocol for real-time communication. The PLC sends operation instructions and frequency data to the inverter, and simultaneously collects the fault information and operating current data of the inverter; the fuse FU1 of the electrical control system has the following short-circuit protection and overload protection functions: the fuse FU1 complies with the ampere-second characteristic, that is, when the overload current is small, the melting time is long; when the overload current is large, the melting time is short, and the motor does not melt when it runs for a long time below the rated current; the fuse is selected according to 1.5 times the rated current of the motor. When an electrical short circuit occurs, the short-circuit current increases rapidly, and the fuse melts in a very short time to protect the safety of the line.

[0009] Another technical solution of the present invention is the control method of the ball-free stone grinding and automatic cleaning mud pulping grinder, which is special in that it includes the following steps:

[0010] ⑴ The grinder is located behind the feeder. Before starting the system, set the parameters on the touch screen of the grinder electrical control system, including the feeder's feed weight per hour, the weight of added water, the weight of added chemicals, and the grinder speed parameters. When the system starts, press the start button and the frequency converter starts running. First, turn on the motor, which drives the reducer to rotate. The reducer drives the grinder barrel to rotate through the transmission belt. The grinder rotation speed is 3-5r / min, the feeder feed is 8000-12000kg / h, and the water addition weight is 5000-7000m 3 / h, the amount of chemical materials added is 300-400kg / h;

[0011] ⑵ The mud paste, water and chemical materials weighed by the feeder enter the grinding machine cylinder through the feed port in proportion. The stirring rack rotates in a circle with the grinding machine cylinder. The stirring rack drives the mud and mud paste to a high position. The mud and mud paste then fall into the mud by free fall, achieving the effect of throwing, dispersing, crushing and grinding.

[0012] ⑶ As the mud slurry grinder is continuously fed and the slurry is discharged, the slurry gradually moves to the slurry outlet on the right side of the grinder cylinder. The tree roots, plastics and other debris floating on the slurry enter the groove of the cleaning plate. The cleaning plate drives the debris to rotate as the grinder cylinder rotates. When the cleaning plate moves to the highest position, the debris is thrown into the discharge flange through the notch of the baffle on the cleaning plate. At the same time, the slurry falls back into the grinder cylinder through the gap of the cleaning plate.

[0013] (4) The debris falls onto the vibrating screen below through the discharge flange. The qualified slurry with a moisture content of 30-40%, a specific gravity of 1.55-1.65 and a fineness of 13.55% passing the 325 mesh sieve is sieved and flows out through the gap of the discharge flange, and enters the slurry pool along the slurry trough equipment for standby use.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The present invention does not require the addition of ball stone media when slurrying and grinding the mud. When the grinder is running, the stirring rack welded on the inner wall of the grinder cylinder also rotates synchronously. The stirring rack brings the mud to a high position, and the mud falls down in an automatic falling motion, and the mud is thrown down, dispersed, crushed and ground, thereby achieving the purpose of grinding and slurrying the mud and saving the slurry production cost.

[0016] ⑵ Compared with the existing mud slurry ball mill technology, the present invention adds a cleaning plate in the grinding machine cylinder. When the grinder is grinding the mud, various debris such as tree roots and plastics floating on the mud are brought into the groove of the cleaning plate. The cleaning plate rotates with the grinding machine cylinder to rotate and throw the debris out of the grinder, and screen the mud. No human participation is required in the whole process, and the degree of automation is high. It simplifies the steps of manually stopping the machine to salvage organic debris floating on the mud, reduces the labor intensity of workers, and improves the efficiency of mud slurry preparation.

[0017] ⑶ The present invention effectively improves the preparation quality of the mud by eliminating the need for ball stone mud slurry grinding and automatically cleaning organic matter, avoids flocs in the slurry, and there are no velvet-like substances after the tiles are fired. The product production quality rate is high, which is in line with the company's purpose of energy conservation and consumption reduction, green intelligent manufacturing, and better meets the requirements of industrial continuous production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of the structure of the mud pulping and grinding machine of the present invention;

[0019] Figure 2 This is a side view of the structure of the mud pulping grinder of the present invention;

[0020] Figure 3 This is a front cross-sectional view of the structure of the mud pulping and grinding machine of the present invention;

[0021] Figure 4 This is a side sectional view of the structure of the mud pulping and grinding machine of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the stirring bracket of the mud pulping grinder of the present invention;

[0023] Figure 6 This is a schematic diagram of the three-dimensional structure of the cleaning plate of the mud pulping grinder of the present invention;

[0024] Figure 7 This is a front view of the cleaning plate structure of the mud pulping grinder of the present invention;

[0025] Figure 8 It is a schematic diagram of the main circuit of the mud material slurry grinding motor of the present invention.

[0026] Description of main component symbols:

[0027] DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings:

[0029] See also Figures 1 to 4As shown, the mud slurry grinder with ball stone-free grinding and automatic cleaning includes a grinder cylinder 1, a feed port 2, a slurry outlet 3, a slurry outlet flange 4, a reducer 5, a motor 6, a transmission belt 7, a stirring frame 9 and a cleaning plate 10. The feed port 2 and the slurry outlet 3 are respectively welded and fixed on both sides of the grinder cylinder 1, and the slurry outlet flange 4 is connected and located on the right side of the slurry outlet 3. The slurry outlet flange 4 is trumpet-shaped and has a gap of 5 to 10 mm; the reducer 5 is connected to the motor 6 through a flange, and the output shafts of the reducer 5 and the motor 6 are coaxial. The reducer 5 and the motor 6 are fixed on the fixed seat 8 by bolts, and the transmission belt 7 connects the pulley installed on the reducer 5 and the pulley on the grinder cylinder 1 to realize belt transmission; the stirring frame 9 is welded to the inner wall of the grinder cylinder 1; one end of the cleaning plate 10 is welded and installed on the inner wall of the grinder cylinder 1 close to the slurry outlet 3, and the other end is against the slurry outlet flange 4.

[0030] See also Figures 3 to 5 As shown, the inner wall of the grinding machine cylinder 1 is welded with a stirring rack 9. The stirring racks 9 are grouped into three and evenly distributed in a 360-degree circumference range of the inner wall of the grinding machine cylinder 1. The welding surface of the stirring rack 9 is curved into an arc, which is cocentric with the grinding machine cylinder 1 and has the same diameter. A total of four groups of stirring racks 9 are set on the inner wall of the grinding machine cylinder 1. The stirring rack 9 is composed of a rubber wear-resistant part 91 and a stainless steel metal bracket 92. The rubber wear-resistant part 91 is fixed to the stainless steel metal bracket 92 by bolts, and the stainless steel metal bracket 92 is welded to the inner wall of the grinding machine cylinder 5.

[0031] See also Figures 6 and 7 As shown, the cleaning plate 10 is in an arc shape and is twisted 45 to 80 degrees in the X-axis direction. Three 100 mm high baffles 101 are provided on the cleaning plate 10, which are respectively located on the left and right sides and the lower end of the cleaning plate 10. The cleaning plate 10 is welded and installed on one end close to the inner wall of the grinding machine cylinder 1. There is no baffle. The setting of the baffle is conducive to the collection of debris such as tree roots and plastics. The baffle 101 of the cleaning plate 10 close to the slurry outlet 3 is only half the length of the baffle 101 on the side close to the grinding machine cylinder 1, which is convenient for sending debris into the discharge flange 4. A number of 5 to 10 mm wide gaps are also provided on the cleaning plate 10 to facilitate the passage of mud.

[0032] See also Figure 8 As shown, the electrical control system of the mud pulping grinder consists of an electric control cabinet, a PLC, and a touch screen. The PLC is installed in the electric control cabinet, and the touch screen is installed in the upper middle position of the front door of the electric control cabinet.

[0033] The main circuit of the electrical control system of the mud pulp grinding machine consists of power supply L1 / L2 / L3 / N, air circuit breaker QF1, fuse FU1, frequency converter, and motor M1. The power supply and air circuit breaker QF1 are connected through copper wire. The circuit breaker QF1 and fuse FU1 have short-circuit protection and overload protection functions. The frequency converter selects heavy-load series frequency converter and vector control mode.

[0034] The inverter is connected to the PLC via RS485 bus and adopts MODBUS-RTU protocol for real-time communication. The PLC sends operation instructions and frequency data to the inverter and collects the inverter's fault information, operating current and other data at the same time.

[0035] Fuse FU1 complies with the ampere-second characteristic, that is, when the overload current is small, the fusing time is long; when the overload current is large, the fusing time is short. When the motor runs below the rated current for a long time, the fuse will not blow. The fuse is selected according to 1.5 times the rated current of the motor. When an electrical short circuit occurs, the short-circuit current increases rapidly, and the fuse blows in a very short time to protect the safety of the circuit.

[0036] 2. Control Methods

[0037] A control method for a ball-free stone grinding and automatic cleaning mud slurry grinding machine includes the following steps:

[0038] ⑴ The mud pulping grinder is located behind the feeder. Before starting the system, set the parameters on the touch screen of the mud pulping grinder electrical control system, including the feeder's feed weight per hour, water weight, chemical weight, grinder speed and other parameters. When the system starts, press the start button and the frequency converter starts running. First, turn on the motor 6, which drives the reducer 5 to run. The reducer 5 drives the grinder barrel 1 to rotate through the transmission belt 7. The grinder rotation speed is 3-5r / min, the feeder feed is 8000-12000kg / h, and the water addition weight is 5000-7000m 3 / h, the amount of chemical materials added is 300-400kg / h;

[0039] (2) The mud paste, water and chemical materials weighed by the feeder enter the grinding machine cylinder 1 through the feed port 2 in proportion. The stirring rack 9 rotates in a circle with the grinding machine cylinder 1. The stirring rack 9 drives the mud and mud paste to a high position. The mud and mud paste then fall freely into the mud to achieve the effect of throwing, dispersing, crushing and grinding.

[0040] (3) As the slurry is continuously fed into the continuous grinding machine, the slurry moves and gradually moves to the slurry outlet 3 on the right side of the grinding machine cylinder 1. The tree roots, plastic and other debris floating on the slurry enter the groove of the cleaning plate 10. The cleaning plate 10 drives the tree roots, plastic and other debris to rotate as the grinding machine cylinder 1 rotates. When the cleaning plate 10 moves to the highest position, the tree roots, plastic and other debris are thrown into the discharge flange 4 through the notch of the baffle on the cleaning plate 10. At the same time, the slurry passes through the gap of the cleaning plate 10 and falls back into the grinding machine cylinder 1.

[0041] (4) Tree roots, plastics and other debris fall through the discharge flange 4 onto the vibrating screen below. The qualified slurry with a moisture content of 30-40%, a specific gravity of 1.55-1.65 and a fineness of 13.55% passing the 325-mesh sieve will pass through the gap of the discharge flange 4 and flow out along the slurry conveying trough equipment into the slurry pool for standby use.

[0042] The above descriptions are merely preferred embodiments of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.

Claims

1. A ball-free grinding and automatic cleaning mud pulping grinder, comprising a grinding machine cylinder, a feed port, a pulp outlet, a pulp outlet flange, a motor, a transmission belt, a reducer, a stirring frame, a cleaning plate, and an electrical control system; the feed port and the pulp outlet are respectively welded and fixed on both sides of the grinding machine cylinder, the transmission belt connects the reducer pulley and the grinder cylinder pulley to realize belt transmission; the reducer is connected to the motor through a flange, the reducer and the motor output shaft are coaxial, and the reducer and the motor are fixed on the fixed seat by bolts; the pulp outlet flange is connected to the pulp outlet; it is characterized in that The cleaning plate is in an arc shape and twisted 45 to 80 degrees in the X-axis direction. One end of the cleaning plate is welded to the inner wall of the grinding cylinder at the slurry outlet, and the other end abuts the slurry outlet flange. The cleaning plate rotates with the grinding cylinder to rotate and throw debris out of the grinding mill and screen the slurry. The grinder does not need to add ball stone media when performing slurry grinding of mud materials. When the grinder is running, the stirring rack welded on the inner wall of the grinder cylinder also rotates synchronously. The stirring rack brings the mud materials to a high position, and the mud materials fall down in an automatic falling motion, and the mud materials are thrown down, dispersed, crushed and ground, and the mud materials are ground and slurried.

2. The ball-free stone grinding and automatic cleaning mud slurry grinding machine according to claim 1 is characterized in that: The cleaning plate is provided with three 100mm high baffles, which are respectively located on the left and right sides and the lower end of the cleaning plate. The cleaning plate is fixed on the inner wall of the grinding machine cylinder and there is no baffle at one end. The baffle is set to collect debris. The length of the cleaning plate baffle near the slurry outlet is half of the baffle on the side of the grinding machine cylinder, which is convenient for sending debris into the discharge flange. There are also several 5-10mm wide gaps on the cleaning plate to facilitate the passage of mud.

3. The ball-free stone grinding and automatic cleaning mud slurry grinding machine according to claim 1 is characterized in that: The inverter of the electrical control system is a heavy-duty series inverter, which adopts the following vector control mode; the inverter is connected to the PLC via the RS485 bus and adopts the MODBUS-RTU protocol for real-time communication. The PLC sends operating instructions and frequency data to the inverter, and simultaneously collects fault information and operating current data of the inverter; the fuse FU1 of the electrical control system has the following short-circuit protection and overload protection functions: the fuse FU1 conforms to the ampere-second characteristic, that is, the overload current is small and the fusing time is long; When the overload current is large, the fuse time is short. When the motor runs for a long time below the rated current, the fuse will not blow. The fuse is selected according to 1.5 times the rated current of the motor. When an electrical short circuit occurs, the short-circuit current increases rapidly, and the fuse blows in a very short time to protect the safety of the line.

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