A cement grinding device with multi-stage powder selection function

Abstract

The present invention discloses a cement grinding device with a multi-stage powder selection function, and relates to the technical field of grinding devices. The device comprises a housing, a driving motor is installed on the housing, a driving gear and a universal joint are installed on one side of the driving motor, a first grinding wheel and a second grinding wheel are installed on one side of the universal joint, a circulation box and a circulation pump are installed on one side of the second grinding wheel, a heat-conducting medium is stored in the circulation box, a refrigeration plate and a temperature difference plate are installed in the first grinding wheel and the second grinding wheel, two groups of filter plates are installed below the first grinding wheel, screens are installed on the two groups of filter plates, and a cleaning rod is installed on one side of the filter plate; the first grinding wheel and the second grinding wheel cooperate to grind cement powder, the circulation box and the circulation pump transport the heat-conducting medium, the refrigeration plate cools the first grinding wheel and the second grinding wheel through the heat-conducting medium, the screen separates cement powder, and the cleaning rod ensures the filtering effect of the screen.

Description

Technical Field

[0001] The invention relates to the technical field of grinding devices, in particular to a cement grinding device with a multi-stage powder selection function. Background Art

[0002] In the cement production process, cement powder needs to be ground to meet the requirements of cement paste coagulation by grinding the cement powder to the required particle size. The existing grinding wheel is mainly used to grind the cement powder. However, in actual use, the friction of the grinding wheel generates a lot of heat, which reduces the life of the grinding wheel. At the same time, the ground cement powder is not graded and cannot meet the use requirements of cement production. Therefore, the existing cement powder grinding device has the following main problems: (1) The grinding wheel generates heat, resulting in a shortened life; (2) The cement powder is not subjected to multi-level powder selection treatment, which cannot meet different use requirements. Summary of the invention

[0003] The object of the present invention is to provide a cement grinding device with a multi-stage powder selection function to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: A cement grinding device with a multi-stage powder selection function, comprising a shell, a driving motor is installed on the shell, a driving gear and a universal joint are installed on one side of the driving motor, a first grinding wheel and a second grinding wheel are installed on one side of the universal joint, a circulation box and a circulation pump are installed on one side of the second grinding wheel, a heat transfer medium is stored in the circulation box, a refrigeration plate and a temperature difference plate A are installed in the first grinding wheel and the second grinding wheel, two groups of filter plates are installed in sequence below the first grinding wheel, screens are installed on both groups of filter plates, and a cleaning rod is installed on one side of the filter plate;

[0005] The first grinding wheel and the second grinding wheel cooperate to grind cement powder, the circulation box and the circulation pump transport the heat-conducting medium, the refrigeration plate cools the first grinding wheel and the second grinding wheel through the heat-conducting medium, the two groups of screens respectively perform primary and secondary screening on the cement powder, and the cleaning rod ensures the filtering effect of the screen.

[0006] The first grinding wheel and the second grinding wheel are hollow inside, the circulation box is hollow inside, the circulation box is installed on the shell, the circulation box is connected to the circulation pump through a pipeline, the circulation pump is connected to the external atmosphere through another pipeline, the pipelines connected to the circulation pump are all installed with switch valves, one side of the first grinding wheel is connected to the circulation pump through a pipeline and an air slip ring, the air slip ring is provided with multiple groups, the other side of the first grinding wheel is connected to one side of the second grinding wheel through a pipeline and an air slip ring, the other side of the second grinding wheel is connected to the circulation box through a pipeline and an air slip ring, and multiple groups of the air slip rings are installed on the shell;

[0007] The first grinding wheel and the second grinding wheel are both slidably mounted on the outer shell through a first spring, and adjustment plates are rotatably mounted on both sides of the first grinding wheel and the second grinding wheel through bearings, and the adjustment plate is slidably connected to the outer shell, and the adjustment plate is limited and supported by the outer shell to prevent the adjustment plate from moving axially along the first grinding wheel and the second grinding wheel, and a telescopic rod of an electric cylinder is installed on one side of the adjustment plate, and the electric cylinder is installed on the outer shell, and the electric cylinder is electrically connected to the control system, and the electric cylinder adjusts the position of the first grinding wheel and the second grinding wheel respectively through the adjustment plate, and then adjusts the distance between the first grinding wheel and the second grinding wheel to achieve the adjustment of the grinding particle size, and the bearing in the middle of the adjustment plate can ensure that the adjustment plate does not rotate with the first grinding wheel and the second grinding wheel to ensure stable adjustment.

[0008] A square shell structure is provided on the upper side of the shell, and a circular shell structure is provided on the lower side of the shell. The two groups of filter plates are sequentially installed in the circular shell structure. A plurality of magnets are installed on the screens on the two groups of filter plates, and the magnetic properties of two adjacent magnets are different. Multiple groups of cleaning rods are provided, and multiple groups of cleaning rods are rotatably installed on the filter plates. The multiple groups of cleaning rods and the filter plates are respectively connected by second springs, and the second springs are electrically connected to the control system. The aperture of the screen on the upper filter plate is larger than that on the lower filter plate. Larger cement powder particles can pass through the screen on the upper filter plate but cannot pass through the screen on the lower filter plate. Smaller cement powder particles can pass through the screens on the filter plates on both sides.

[0009] The cleaning rod is provided with a brush, and a plurality of electromagnets are installed on one side of the brush. The magnetic fields of two adjacent electromagnets are the same, and multiple groups of electromagnets correspond to multiple groups of magnets one by one. The multiple electromagnets are electrically connected to a control system.

[0010] A plurality of first chambers are arranged inside the first grinding wheel and the second grinding wheel, a tympanic membrane is installed on one side of the plurality of first chambers, a plurality of folds are arranged on the tympanic membrane, and the refrigeration plate is installed on the inner wall of the first grinding wheel and the second grinding wheel close to the first chamber;

[0011] The refrigeration plate is composed of semiconductors of two different materials and a metal plate. One end of the semiconductors of two different materials on the refrigeration plate is connected to the metal plate. The semiconductors on the refrigeration plate are electrically connected to the control system through wires. The semiconductors and metal plates on the refrigeration plate are the refrigeration ends in the Peltier effect.

[0012] The temperature difference plate A is installed on the first grinding wheel and the second grinding wheel between two adjacent first chambers. Several temperature difference plates B are installed on the inner wall of the circulation box. The temperature difference plate A and the temperature difference plate B are both composed of semiconductors of two different materials and a metal plate. One end of the semiconductors of two different materials on the temperature difference plate A and the temperature difference plate B are connected to the metal plate. The semiconductors on the temperature difference plate A and the temperature difference plate B are electrically connected to the control system through wires. The semiconductors and the metal plate on the temperature difference plate A are the hot ends of the Seebeck effect, and the semiconductors and the metal plate on the temperature difference plate B are the cold ends of the Seebeck effect, and the hot ends and the cold ends correspond one to one.

[0013] The staff puts the cement raw materials into the hopper, and the hopper transports the cement raw materials to between the first grinding wheel and the second grinding wheel and drops it. The control system controls the drive motor to drive the active gear to rotate, and the active gear drives the driven gears on both sides to rotate. The driven gears on both sides respectively drive the first grinding wheel and the second grinding wheel to rotate through the universal joint. The first grinding wheel and the second grinding wheel extrude and grind the cement powder, and the ground cement powder falls on the sliding plate in the discharge port.

[0014] When the ground cement powder falls on the sliding plate, the displacement sensor on the sliding plate feeds back the displacement data to the control system. After processing, the control system controls the third spring to be energized. A magnetic field of mutual attraction is generated between each turn of the third spring. The magnetic field compresses the third spring. The third spring pulls the sliding plate to the side away from the discharge port, so that the discharge port is opened. The cement powder is transported to the screen of the upper filter plate through the discharge port. The control system continuously energizes and deenergizes the second spring, and multiple groups of electromagnets are energized. After the second spring is energized, each turn is affected by the magnetic field of mutual attraction and gradually shrinks. Since the second spring pulls the cleaning rod It is connected to the filter plate, so the second spring pulls the cleaning rod to rotate a certain angle, and the brush and multiple groups of electromagnets on the cleaning rod follow the movement, and the brush scrubs the screen to prevent cement powder from clogging the screen. The electromagnet on the left is close to the magnet on the left side of the screen to generate a magnetic field repulsion, and the magnet on the left pushes the screen to bulge downward, and the electromagnet on the right is close to the magnet on the right side of the screen to generate an attraction, and the magnet on the right pushes the screen to bulge upward. Since multiple groups of magnets and electromagnets are installed accordingly, the screen vibrates, which is convenient for the screen to select cement powder and further prevents the screen from being blocked, ensuring that the screen has a better filtering effect.

[0015] Impurities in the cement powder are deposited on the screen of the upper filter plate, large particles in the cement powder pass through the screen in the upper filter plate and are deposited on the screen of the lower filter plate, and small particles in the cement powder pass through the screens on the filter plates on both sides and fall on the bottom of the shell. The staff opens the first discharge port to take out the impurities, opens the second discharge port to take out the large particles, and opens the third discharge port to take out the small particles, thereby realizing a multi-stage powder selection function. The first discharge port, the second discharge port and the third discharge port can also be connected to corresponding extraction and storage devices for further processing, or the large particles can be put back into the hopper for further grinding.

[0016] When the first grinding wheel and the second grinding wheel are working for a long time, they are always in contact with cement powder. The first grinding wheel and the second grinding wheel generate heat due to friction with the cement powder. The temperature inside the first grinding wheel and the second grinding wheel rises, and the heat is transferred to the first chamber and the temperature difference plate A. The temperature difference plate A transfers the heat to the metal plate at the hot end. Since the cold end is located in the circulation box, the temperature of the cold end is lower than the temperature of the hot end. The current is generated between the hot end and the cold end through the Seebeck effect and transmitted to the control system. After rectification and voltage conversion, the control system is used for cooling and cooling the refrigeration plate. The technical solution of using the heat generated by grinding to generate current for cooling reduces energy consumption and extends the use time of the device. The gas pressure in the first chamber increases, and the gas in the first chamber squeezes the eardrum, causing the eardrum to protrude away from the side of the first chamber, and the folds on the eardrum gradually unfold, and the contact area on one side of the eardrum increases.

[0017] When the staff presses the cooling button on the control panel, the cooling button feeds back an electrical signal to the control system. The control system closes the switch valve on the circulation pump that is connected to the external atmosphere, and opens the other switch valves. The control system controls the circulation pump to work and the two semiconductors on the refrigeration plate to energize. The circulation pump extracts the heat-conducting medium in the circulation box and transports it to the first grinding wheel through the pipeline and the air slip ring. The heat-conducting medium contacts the eardrum, and the semiconductor and metal plate on the refrigeration plate cool the eardrum, causing the temperature of the first chamber to drop. The air pressure in the first chamber decreases, and the eardrum reduces its protrusion under its own elastic force, and the folds on the eardrum shrink a part. The temperature of the heat-conducting medium drops after contacting the eardrum. Since multiple groups of first chambers, eardrums and refrigeration plates are provided, the temperature of the heat-conducting medium gradually decreases in the first grinding wheel. Afterwards, the heat-conducting medium is discharged from the first grinding wheel and transported to the second grinding wheel through a pipeline and an air slip ring. The heat-conducting medium is cooled again by passing through the refrigeration plate in the second grinding wheel. The heat-conducting medium is discharged from the second grinding wheel to the circulation box and the circulation pump. The heat-conducting medium, which has been cooled, circulates in the first grinding wheel and the second grinding wheel through the extraction of the circulation pump, and continuously cools the first grinding wheel and the second grinding wheel, thereby extending the service life of the first grinding wheel and the second grinding wheel.

[0018] The spacing between the first grinding wheel and the second grinding wheel is adjustable to meet different usage requirements. The control system controls the operation of the electric cylinders on both sides, and the electric cylinders on both sides drive the adjustment plates on both sides to move respectively, and the adjustment plates on both sides drive the first grinding wheel and the second grinding wheel to move respectively, and the first grinding wheel and the second grinding wheel slide on the shell and compress the first spring. The pressure sensor and displacement sensor inside the electric cylinder feed back the pressure data and displacement data to the control system in real time, and the control system then obtains the position of the first grinding wheel and the second grinding wheel. The universal joint connected between the first grinding wheel and the left driven gear and the universal joint connected between the second grinding wheel and the right driven gear can ensure the power transmission after the position is moved. The air slip ring connected to the first grinding wheel and the second grinding wheel through the pipeline can ensure the transportation of the heat transfer medium during rotation, thereby realizing the cooling of the first grinding wheel and the second grinding wheel.

[0019] After the grinding of the first grinding wheel and the second grinding wheel is completed, the control system opens the switch valve (the switch valve in the pipe connected to the external air), closes the other switch valves (the switch valve in the pipe connecting the circulating pump and the circulating box), and opens the air release valve. The circulating pump draws external air into the pipe and the first grinding wheel, and transports the heat transfer medium in the pipe and the first grinding wheel to the second grinding wheel. Finally, the heat transfer medium enters the circulating box, and the air release valve releases the pressure on the air at the same time.

[0020] A feed opening is provided on the outer shell below the first grinding wheel and the second grinding wheel, a sliding plate is slidably installed on the lower side of the feed opening, the sliding plate and the outer shell are connected by a third spring, the third spring is electrically connected to the control system, a displacement sensor is installed on the sliding plate, and the displacement sensor is electrically connected to the control system.

[0021] A hopper is installed on the housing above the first grinding wheel, and the longitudinal section of the hopper is "V"-shaped. The hopper is installed on the housing, the drive motor is installed on the housing, the driving gear is installed on the output shaft of the drive motor, and driven gears are respectively meshed on both sides of the driving gear. The driven gear is rotatably installed on the housing through bearings, the driven gear on the left side is connected to the first grinding wheel through a universal joint, and the driven gear on the right side is connected to the second grinding wheel through another set of universal joints.

[0022] The surfaces of the first grinding wheel and the second grinding wheel are both provided with grinding particles, the outlet of the hopper is located between the first grinding wheel and the second grinding wheel, and the circulation box is equipped with an air release valve connected to the inside.

[0023] A control panel is installed on the shell, and a control system is arranged inside the control panel. A first discharge port is arranged on the shell near the upper filter plate, a second discharge port is arranged on the shell near the two groups of filter plates, and a third discharge port is arranged on the shell near the lower filter plate.

[0024] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0025] 1. Multi-stage powder selection can adapt to different occasions. Impurities in cement powder are deposited on the screen of the upper filter plate, large particles in cement powder pass through the screen in the upper filter plate and are deposited on the screen of the lower filter plate, and small particles in cement powder pass through the screens on the filter plates on both sides and fall on the bottom of the shell. The staff opens the first discharge port to take out the impurities, opens the second discharge port to take out the large particles, and opens the third discharge port to take out the small particles, realizing the multi-stage powder selection function. The first discharge port, the second discharge port and the third discharge port can also be connected to the corresponding extraction and storage devices for further processing, or the large particles can be put back into the hopper for further grinding to meet different occasions.

[0026] 2. The first grinding wheel and the second grinding wheel are cooled internally to extend their service life. The heat-conducting medium is discharged from the first grinding wheel and transported to the second grinding wheel through the pipeline and the air slip ring. The heat-conducting medium is cooled again by the refrigeration plate in the second grinding wheel. The heat-conducting medium is discharged from the second grinding wheel to the circulation box and the circulation pump. The cooled heat-conducting medium is extracted by the circulation pump and circulates in the first grinding wheel and the second grinding wheel, continuously cooling the first grinding wheel and the second grinding wheel, thereby extending the service life of the first grinding wheel and the second grinding wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 yes Figure 1 Top view without the hopper;

[0030] Figure 3 yes Figure 2 A partial enlarged view of the middle A area;

[0031] Figure 4 yes Figure 2 Schematic diagram of the structure after removing the first grinding wheel and the upper structure of the sliding plate;

[0032] Figure 5 It is a schematic diagram of the installation structure of the sliding plate, the feeding port, the housing and the third spring;

[0033] Figure 6 It is a schematic diagram of the installation structure of the filter plate, the screen, the second spring and the cleaning rod;

[0034] Figure 7 It is a schematic diagram of the internal structure of the first grinding wheel.

[0035] In the figure: 1. control panel; 11. housing; 12. first spring; 13. adjustment plate; 14. electric cylinder; 15. air slip ring; 17. hopper; 18. sliding plate; 19. first discharge port; 191. second discharge port; 192. third discharge port; 2. driving motor; 21. driving gear; 22. driven gear; 23. first grinding wheel; 24. second grinding wheel; 25. universal joint; 26. discharge port; 3. circulation box; 31. circulation pump; 32. heat transfer medium; 33. refrigeration plate; 34. temperature difference plate A; 341. temperature difference plate B; 35. first chamber; 36. tympanic membrane; 4. filter plate; 41. screen; 42. cleaning rod; 43. second spring. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-Figure 7 The present invention provides a technical solution: a cement grinding device with a multi-stage powder selection function, comprising a housing 11, a driving motor 2 is installed on the housing 11, a driving gear 21 and a universal joint 25 are installed on one side of the driving motor 2, a first grinding wheel 23 and a second grinding wheel 24 are installed on one side of the universal joint 25, a circulation box 3 and a circulation pump 31 are installed on one side of the second grinding wheel 24, a heat transfer medium 32 is stored in the circulation box 3, a refrigeration plate 33 and a temperature difference plate A34 are installed in the first grinding wheel 23 and the second grinding wheel 24, two groups of filter plates 4 are installed in sequence below the first grinding wheel 23, screens 41 are installed on both groups of filter plates 4, and a cleaning rod 42 is installed on one side of the filter plate 4; the first The grinding wheel 23 and the second grinding wheel 24 cooperate to grind the cement powder, the circulation box 3 and the circulation pump 31 transport the heat-conducting medium 32, the refrigeration plate 33 cools the first grinding wheel 23 and the second grinding wheel 24 through the heat-conducting medium 32, and the two groups of screens 41 perform primary and secondary screening on the cement powder respectively. The cleaning rod 42 ensures the filtering effect of the screen 41. A control panel 1 is installed on the outer shell 11, and a control system is arranged in the control panel 1. A first discharge port 19 is arranged on the outer shell 11 near the upper filter plate 4, a second discharge port 191 is arranged on the outer shell 11 near the two groups of filter plates 4, and a third discharge port 192 is arranged on the outer shell 11 near the lower filter plate 4.

[0038] The first grinding wheel 23 and the second grinding wheel 24 are hollow inside, the circulation box 3 is hollow inside, the circulation box 3 is installed on the shell 11, the circulation box 3 is connected to the circulation pump 31 through a pipeline, the circulation pump 31 is connected to the external atmosphere through another pipeline, and the pipelines connected to the circulation pump 31 are installed with switch valves, one side of the first grinding wheel 23 is connected to the circulation pump 31 through a pipeline and an air slip ring 15, and multiple groups of air slip rings 15 are provided, the other side of the first grinding wheel 23 is connected to one side of the second grinding wheel 24 through a pipeline and an air slip ring 15, and the other side of the second grinding wheel 24 is connected to the circulation box 3 through a pipeline and an air slip ring 15, and multiple groups of air slip rings 15 are installed On the housing 11; a plurality of first chambers 35 are arranged inside the first grinding wheel 23 and the second grinding wheel 24, a tympanum 36 is installed on one side of the plurality of first chambers 35, and a plurality of folds are arranged on the tympanum 36, and a cooling plate 33 is installed on the inner wall of the first grinding wheel 23 and the second grinding wheel 24 near the first chamber 35; the cooling plate 33 is composed of a semiconductor and a metal plate of two different materials, one end of the semiconductors of the two different materials on the cooling plate 33 are connected to the metal plate, the semiconductor on the cooling plate 33 is electrically connected to the control system through a wire, and the semiconductor and the metal plate on the cooling plate 33 are the cooling ends in the Peltier effect;

[0039] The first grinding wheel 23 and the second grinding wheel 24 are both slidably mounted on the housing 11 through the first spring 12. Adjustment plates 13 are rotatably mounted on both sides of the first grinding wheel 23 and the second grinding wheel 24 through bearings. The adjustment plate 13 is slidably connected to the housing 11. The adjustment plate 13 is limited and supported by the housing 11 to prevent the adjustment plate 13 from moving axially along the first grinding wheel 23 and the second grinding wheel 24. A telescopic rod of an electric cylinder 14 is installed on one side of the adjustment plate 13. The electric cylinder 14 is installed on the housing 11. The electric cylinder 14 is electrically connected to the control system. The electric cylinder 14 adjusts the position of the first grinding wheel 23 and the second grinding wheel 24 respectively through the adjustment plate 13, and then adjusts the spacing between the first grinding wheel 23 and the second grinding wheel 24 to achieve the adjustment of the grinding particle size. The bearing in the middle of the adjustment plate 13 can ensure that the adjustment plate 13 does not rotate with the first grinding wheel 23 and the second grinding wheel 24 to ensure stable adjustment. Abrasive particles are arranged on the surfaces of the first grinding wheel 23 and the second grinding wheel 24. The circulation box 3 is equipped with an air release valve connected to the interior, and the air release valve is electrically connected to the control system.

[0040] The temperature difference plate A34 is installed on the first grinding wheel 23 and the second grinding wheel 24 between two adjacent first chambers 35. Several temperature difference plates B341 are installed on the inner wall of the circulation box 3. The temperature difference plate A34 and the temperature difference plate B341 are both composed of semiconductors of two different materials and a metal plate. One end of the semiconductors of two different materials on the temperature difference plate A34 and the temperature difference plate B341 are connected to the metal plate. The semiconductors on the temperature difference plate A34 and the temperature difference plate B341 are electrically connected to the control system through wires. The semiconductors and metal plates on the temperature difference plate A34 are the hot ends of the Seebeck effect, and the semiconductors and metal plates on the temperature difference plate B341 are the cold ends of the Seebeck effect. The hot end and the cold end correspond one to one.

[0041] A square shell structure is provided on the upper side of the shell 11, and a circular shell structure is provided on the lower side of the shell 11. Two groups of filter plates 4 are sequentially installed in the circular shell structure. A plurality of magnets are installed on the screens 41 on the two groups of filter plates 4. The magnetic properties of two adjacent magnets are different. A plurality of cleaning rods 42 are provided. The plurality of cleaning rods 42 are rotatably installed on the filter plates 4. The plurality of cleaning rods 42 and the filter plates 4 are respectively connected by second springs 43. The second springs 43 are electrically connected to the control system. The aperture of the screen 41 on the upper filter plate 4 is larger than that of the screen 41 on the lower filter plate 4. Large cement powder particles can pass through the screen 41 on the upper filter plate 4 but cannot pass through the screen 41 on the lower filter plate 4. The screen 41 on the filter plate 4, smaller cement powder particles can pass through the screen 41 on the filter plates 4 on both sides, a brush is provided on the cleaning rod 42, and a plurality of electromagnets are installed on one side of the brush. The magnetic fields of two adjacent electromagnets are the same, and multiple groups of electromagnets correspond to multiple groups of magnets one by one. The plurality of electromagnets are electrically connected to the control system, and a feed port 26 is provided on the outer shell 11 below the first grinding wheel 23 and the second grinding wheel 24, and a sliding plate 18 is slidably installed on the lower side of the feed port 26. The sliding plate 18 and the outer shell 11 are connected by a third spring, and the third spring is electrically connected to the control system. A displacement sensor is installed on the sliding plate 18, and the displacement sensor is electrically connected to the control system.

[0042] A hopper 17 is installed on the housing 11 above the first grinding wheel 23. The longitudinal section of the hopper 17 is "V"-shaped. The hopper 17 is installed on the housing 11. The outlet of the hopper 17 is located between the first grinding wheel 23 and the second grinding wheel 24. The driving motor 2 is installed on the housing 11. The driving gear 21 is installed on the output shaft of the driving motor 2. Driven gears 22 are respectively meshed on both sides of the driving gear 21. The driven gear 22 is rotatably installed on the housing 11 through bearings. The driven gear 22 on the left side is connected to the first grinding wheel 23 through a universal joint 25, and the driven gear 22 on the right side is connected to the second grinding wheel 24 through another set of universal joints 25.

[0043] The working principle of the present invention is as follows: the staff puts the cement raw material into the hopper 17, the hopper 17 transports the cement raw material to between the first grinding wheel 23 and the second grinding wheel 24 and drops it, the control system controls the driving motor 2 to drive the driving gear 21 to rotate, the driving gear 21 drives the driven gears 22 on both sides to rotate, the driven gears 22 on both sides respectively drive the first grinding wheel 23 and the second grinding wheel 24 to rotate through the universal joint 25, the first grinding wheel 23 and the second grinding wheel 24 extrude and grind the cement powder, and the ground cement powder falls on the sliding plate 18 in the discharge port 26.

[0044] When the ground cement powder falls on the sliding plate 18, the displacement sensor on the sliding plate 18 feeds back the displacement data to the control system. After processing, the control system controls the third spring to be energized. A magnetic field of mutual attraction is generated between each turn of the third spring. The magnetic field compresses the third spring. The third spring pulls the sliding plate 18 to move to the side away from the discharge port 26, so that the discharge port 26 is opened. The cement powder falls onto the screen 41 of the upper filter plate 4 through the discharge port 26. The control system continuously energizes and de-energizes the second spring 43, and energizes multiple groups of electromagnets. After the second spring 43 is energized, each turn is affected by the mutually attractive magnetic field and gradually shrinks. Since the second spring 43 pulls the cleaning rod 42 and the over-filter 41 together, the second spring 43 pulls the cleaning rod 42 and the over-filter 41 together. The filter plate 4 is connected, so the second spring 43 pulls the cleaning rod 42 to rotate a certain angle, and the brush and multiple groups of electromagnets on the cleaning rod 42 follow the movement, and the brush scrubs the screen 41 to prevent the cement powder from clogging the screen 41. The electromagnet on the left is close to the magnet on the left side of the screen 41 to generate a magnetic field repulsion, and the magnet on the left pushes the screen 41 to bulge downward, and the electromagnet on the right is close to the magnet on the right side of the screen 41 to generate an attraction, and the magnet on the right pushes the screen 41 to bulge upward. Since multiple groups of magnets and electromagnets are installed accordingly, the screen 41 vibrates, which is convenient for the screen 41 to select the cement powder, and further prevents the screen 41 from being blocked, ensuring that the screen 41 has a better filtering effect.

[0045] Impurities in the cement powder are deposited on the screen 41 of the upper filter plate 4, large particles in the cement powder pass through the screen 41 in the upper filter plate 4 and are deposited on the screen 41 of the lower filter plate 4, and small particles in the cement powder pass through the screens 41 on the filter plates 4 on both sides and fall on the bottom of the shell 11. The staff opens the first discharge port 19 to take out the impurities, opens the second discharge port 191 to take out the large particles, and opens the third discharge port 192 to take out the small particles, thereby realizing a multi-stage powder selection function. The first discharge port 19, the second discharge port 191 and the third discharge port 192 can also be connected to corresponding extraction and storage devices for further processing, or the large particles can be put back into the hopper 17 for further grinding.

[0046] When the first grinding wheel 23 and the second grinding wheel 24 are working for a long time, they are always in contact with cement powder. The first grinding wheel 23 and the second grinding wheel 24 are heated by friction with the cement powder. The temperature inside the first grinding wheel 23 and the second grinding wheel 24 rises, and the heat is transferred to the first chamber 35 and the temperature difference plate A34. The temperature difference plate A34 transfers the heat to the metal plate at the hot end. Since the cold end is located in the circulation box 3, the temperature of the cold end is lower than the temperature of the hot end. The Seebeck effect generates current between the hot end and the cold end and transmits it to the control system. After rectification and voltage transformation, the control system is used for The cooling and cooling of the refrigeration plate 33 uses the heat generated by grinding to generate electric current for cooling, which reduces energy consumption and prolongs the use time of the device. When the current generated by the cold end and the hot end through the Seebeck effect is small, the control directly supplies power to the refrigeration plate 33 to ensure the normal operation of the refrigeration plate 33; the gas pressure in the first chamber 35 increases, and the gas in the first chamber 35 squeezes the eardrum 36, causing the eardrum 36 to protrude away from one side of the first chamber 35, and the folds on the eardrum 36 gradually unfold, and the contact area on one side of the eardrum 36 increases;

[0047] When the staff presses the cooling button on the control panel 1, the cooling button feeds back an electrical signal to the control system, and the control system closes the switch valve on the circulation pump 31 that is connected to the external atmosphere, and opens the other switch valves. The control system controls the circulation pump 31 to work and the two semiconductors on the refrigeration plate 33 to energize. The circulation pump 31 extracts the heat-conducting medium 32 in the circulation box 3 and transports it to the first grinding wheel 23 through the pipeline and the air slip ring 15. The heat-conducting medium 32 contacts the eardrum 36, and the semiconductors and metal plates on the refrigeration plate 33 cool the eardrum 36, so that the temperature of the first chamber 35 drops, the air pressure in the first chamber 35 decreases, and the eardrum 36 reduces the protrusion degree under the action of its own elastic force. The folds on the eardrum 36 shrink a part, and the heat-conducting medium 32 contacts the eardrum. The temperature of the heat-conducting medium 32 drops after passing through the membrane 36. Since multiple groups of first chambers 35, tympanic membranes 36 and refrigeration plates 33 are provided, the temperature of the heat-conducting medium 32 in the first grinding wheel 23 gradually decreases. After that, the heat-conducting medium 32 is discharged from the first grinding wheel 23 and transported to the second grinding wheel 24 through the pipeline and the air slip ring 15. The heat-conducting medium 32 is cooled again after passing through the refrigeration plate 33 in the second grinding wheel 24. The heat-conducting medium 32 is discharged from the second grinding wheel 24 to the circulation box 3 and the circulation pump 31. The heat-conducting medium 32 after cooling is extracted by the circulation pump 31 and circulates in the first grinding wheel 23 and the second grinding wheel 24, so as to continuously cool the first grinding wheel 23 and the second grinding wheel 24 and extend the service life of the first grinding wheel 23 and the second grinding wheel 24.

[0048] The spacing between the first grinding wheel 23 and the second grinding wheel 24 is adjustable to meet different usage requirements. The control system controls the electric cylinders 14 on both sides to work, and the electric cylinders 14 on both sides drive the adjustment plates 13 on both sides to move, and the adjustment plates 13 on both sides drive the first grinding wheel 23 and the second grinding wheel 24 to move, respectively. The first grinding wheel 23 and the second grinding wheel 24 slide on the housing 11 and compress the first spring 12. The pressure sensor and displacement sensor inside the electric cylinder 14 feed back the pressure data and displacement data to the control system in real time, and the control system then obtains the position of the first grinding wheel 23 and the second grinding wheel 24. The universal joint 25 connected between the first grinding wheel 23 and the left driven gear 22 and the universal joint 25 connected between the second grinding wheel 24 and the right driven gear 22 can ensure the power transmission after the position is moved. The air slip ring 15 connected to the first grinding wheel 23 and the second grinding wheel 24 through the pipeline can ensure the transportation of the heat transfer medium 32 during rotation, thereby realizing the cooling of the first grinding wheel 23 and the second grinding wheel 24.

[0049] After the grinding of the first grinding wheel 23 and the second grinding wheel 24 is completed, the control system opens the switch valve (the switch valve in the pipe connected to the external air), closes the other switch valves (the switch valve in the pipe connecting the circulating pump 31 and the circulating box 3), and opens the air release valve. The circulating pump 31 draws external air into the pipe and the first grinding wheel 23, and the air pushes the heat transfer medium 32 in the pipe and the first grinding wheel 23 to the second grinding wheel 24. Finally, the heat transfer medium 32 enters the circulating box 3, and the air release valve releases the pressure on the air at the same time.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cement grinding device with multi-stage powder selection function, characterized in that: The invention comprises a housing (11), a driving motor (2) being mounted on the housing (11), a driving gear (21) and a universal joint (25) being mounted on one side of the driving motor (2), a first grinding wheel (23) and a second grinding wheel (24) being mounted on one side of the universal joint (25), a circulation box (3) and a circulation pump (31) being mounted on one side of the second grinding wheel (24), a heat transfer medium (32) being stored in the circulation box (3), a cooling plate (33) and a temperature difference plate A (34) being mounted in the first grinding wheel (23) and the second grinding wheel (24), two groups of filter plates (4) being mounted in sequence below the first grinding wheel (23), screens (41) being mounted on both groups of the filter plates (4), and a cleaning rod (42) being mounted on one side of the filter plates (4); The first grinding wheel (23) and the second grinding wheel (24) cooperate to grind cement powder, the circulation box (3) and the circulation pump (31) transport the heat-conducting medium (32), the refrigeration plate (33) cools the first grinding wheel (23) and the second grinding wheel (24) through the heat-conducting medium (32), the two groups of screens (41) respectively perform primary screening and secondary screening on the cement powder, and the cleaning rod (42) ensures the filtering effect of the screen (41); A plurality of first chambers (35) are arranged inside the first grinding wheel (23) and the second grinding wheel (24), a tympanum (36) is installed on one side of the plurality of first chambers (35), and a plurality of folds are arranged on the tympanum (36), and the cooling plate (33) is installed on the inner wall of the first grinding wheel (23) and the second grinding wheel (24) close to the first chamber (35); The refrigeration plate (33) is composed of semiconductors of two different materials and a metal plate, one end of the semiconductors of the two different materials on the refrigeration plate (33) is connected to the metal plate, and the semiconductors on the refrigeration plate (33) are electrically connected to the control system via a wire; The first grinding wheel (23) and the second grinding wheel (24) are hollow inside, the circulation box (3) is hollow inside, the circulation box (3) is mounted on the housing (11), the circulation box (3) is connected to a circulation pump (31) via a pipeline, the circulation pump (31) is connected to the external atmosphere via another pipeline, the pipelines connected to the circulation pump (31) are all installed with switch valves, one side of the first grinding wheel (23) is connected to the circulation pump (31) via a pipeline and an air slip ring (15), a plurality of groups of the air slip ring (15) are provided, the other side of the first grinding wheel (23) is connected to one side of the second grinding wheel (24) via a pipeline and an air slip ring (15), the other side of the second grinding wheel (24) is connected to the circulation box (3) via a pipeline and an air slip ring (15), and a plurality of groups of the air slip ring (15) are mounted on the housing (11); The temperature difference plate A (34) is installed on the first grinding wheel (23) and the second grinding wheel (24) between two adjacent first chambers (35), and a plurality of temperature difference plates B (341) are installed on the inner wall of the circulation box (3). The temperature difference plate A (34) and the temperature difference plate B (341) are both composed of semiconductors of two different materials and a metal plate. One end of the semiconductors of two different materials on the temperature difference plate A (34) and the temperature difference plate B (341) are connected to the metal plate, and the semiconductors on the temperature difference plate A (34) and the temperature difference plate B (341) are electrically connected to the control system through wires.

2. The cement grinding device with multi-stage powder selection function according to claim 1 is characterized in that: The first grinding wheel (23) and the second grinding wheel (24) are both slidably mounted on the housing (11) via a first spring (12); an adjustment plate (13) is rotatably mounted on both sides of the first grinding wheel (23) and the second grinding wheel (24) via bearings; the adjustment plate (13) is slidably connected to the housing (11); the adjustment plate (13) is limited and supported by the housing (11) to prevent the adjustment plate (13) from moving axially along the first grinding wheel (23) and the second grinding wheel (24); a telescopic rod of an electric cylinder (14) is mounted on one side of the adjustment plate (13); the electric cylinder (14) is mounted on the housing (11); and the electric cylinder (14) is electrically connected to a control system.

3. The cement grinding device with multi-stage powder selection function according to claim 2 is characterized in that: A square shell structure is provided on the upper side of the shell (11), and a circular shell structure is provided on the lower side of the shell (11). Two groups of filter plates (4) are sequentially mounted in the circular shell structure. The screens (41) on the two groups of filter plates (4) are both mounted with a plurality of magnets, and the magnetic properties of two adjacent magnets are different. A plurality of cleaning rods (42) are provided, and the plurality of cleaning rods (42) are rotatably mounted on the filter plates (4). The plurality of cleaning rods (42) and the filter plates (4) are respectively connected via second springs (43), and the second springs (43) are electrically connected to a control system. The aperture of the screen (41) on the upper filter plate (4) is larger than that of the screen (41) on the lower filter plate (4).

4. The cement grinding device with multi-stage powder selection function according to claim 3 is characterized in that: The cleaning rod (42) is provided with a brush, and a plurality of electromagnets are installed on one side of the brush. The magnetic fields of two adjacent electromagnets are the same, and multiple groups of electromagnets correspond to multiple groups of magnets one by one. The multiple electromagnets are electrically connected to a control system.

5. The cement grinding device with multi-stage powder selection function according to claim 4 is characterized in that: A material discharge port (26) is provided on the housing (11) below the first grinding wheel (23) and the second grinding wheel (24); a sliding plate (18) is slidably mounted on the lower side of the material discharge port (26); the sliding plate (18) and the housing (11) are connected via a third spring; the third spring is electrically connected to a control system; a displacement sensor is mounted on the sliding plate (18); and the displacement sensor is electrically connected to the control system.

6. The cement grinding device with multi-stage powder selection function according to claim 5 is characterized in that: The housing (11) above the first grinding wheel (23) is provided with a hopper (17), the longitudinal section of the hopper (17) being in a "V" shape. The hopper (17) is mounted on the housing (11), the drive motor (2) is mounted on the housing (11), the driving gear (21) is mounted on the output shaft of the drive motor (2), driven gears (22) are respectively meshed on both sides of the driving gear (21), and the driven gears (22) are rotatably mounted on the housing (11) via bearings. The driven gear (22) on the left side is connected to the first grinding wheel (23) via a universal joint (25), and the driven gear (22) on the right side is connected to the second grinding wheel (24) via another set of universal joints (25).

7. The cement grinding device with multi-stage powder selection function according to claim 6 is characterized in that: The surfaces of the first grinding wheel (23) and the second grinding wheel (24) are both provided with grinding particles, the outlet of the hopper (17) is located between the first grinding wheel (23) and the second grinding wheel (24), and the circulation box (3) is equipped with an air release valve connected to the inside.

8. The cement grinding device with multi-stage powder selection function according to claim 7 is characterized in that: A control panel (1) is mounted on the housing (11), a control system is arranged inside the control panel (1), a first discharge port (19) is arranged on the housing (11) near the upper filter plate (4), a second discharge port (191) is arranged on the housing (11) near the two groups of filter plates (4), and a third discharge port (192) is arranged on the housing (11) near the lower filter plate (4).

Images