A fully externally circulated vertical cement mill

Abstract

The present invention discloses a fully externally circulating vertical cement mill, which relates to the technical field of grinding, and includes a grinding barrel. A grinding block is arranged inside the grinding barrel. A connecting piece is installed at the output end of a servo motor. A rectangular groove and an annular groove are formed on the upper surface of the grinding block. One end of the connecting piece away from the servo motor is inserted into the rectangular groove and the annular groove. A material box is arranged on the annular surface of the grinding barrel. A feed hole is formed at the bottom of the grinding barrel. A first feed pipe is arranged between the material box and the feed hole. An extrusion piece is arranged at one end of the connecting piece away from the grinding block. The extrusion piece is connected to a bracket. One end of the extrusion piece away from the connecting piece is arranged inside the feed hole. By connecting a pulling structure to the annular surface of the connecting rod and using the pulling structure to drive the grinding block to be indirectly lifted for feeding, the grinding efficiency of cement is improved. When the reciprocating block moves upward, the space inside the rectangular cylinder is squeezed, causing the lifting plate to rise for feeding, thus saving the use of the feeding mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding, and specifically to a fully externally circulating vertical cement mill. Background Art

[0002] After cement is mixed with water and stirred, it becomes a slurry, which can harden in the air or in water and can firmly bond materials such as sand and stones together. It is a main building material. A cement mill is a key equipment for further pulverizing materials after they are crushed. Ball mills are widely used in production industries such as cement, non-ferrous metal beneficiation, and glass ceramics.

[0003] Traditional vertical mills feed materials from above, and then use multiple grinding rollers installed on the side to grind the incoming materials. Since only one point of the grinding roller contacts the materials on the grinding table, the grinding efficiency of the materials is low, and the ground cement is discharged using the height difference. When discharging materials in this way, it is easy for materials that do not meet the grinding requirements to be discharged in advance, resulting in a low qualified rate of cement powder.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a fully externally circulating vertical cement mill is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a fully externally circulating vertical cement mill to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A fully externally circulating vertical cement mill, including a grinding barrel, a grinding block is arranged inside the grinding barrel, a bracket is installed on the upper surface of the grinding barrel, a servo motor is installed on the bracket, a connecting piece is installed at the output end of the servo motor, a rectangular groove and an annular groove are opened on the upper surface of the grinding block, and the end of the connecting piece away from the servo motor is inserted into the rectangular groove and the annular groove. A feed box is arranged on the annular surface of the grinding barrel, a feed hole is opened at the bottom of the grinding barrel, a first feed pipe is arranged between the feed box and the feed hole, an extrusion piece is arranged at the end of the connecting piece away from the grinding block, the extrusion piece is connected to the bracket, and the end of the extrusion piece away from the connecting piece is arranged in the feed hole.

[0007] Further, the connecting piece includes a connecting rod, the connecting rod is installed at the output end of the servo motor, a rectangular block is installed at the end of the connecting rod away from the servo motor, the rectangular block is inserted into the rectangular groove, a reciprocating thread groove is opened on the annular surface of the connecting rod, a pulling piece is threadedly connected to the annular surface of the reciprocating thread groove, one inserted end of the pulling piece is inserted into the annular groove, and the end of the pulling piece away from the annular groove is connected to the extrusion piece.

[0008] Further, the pulling member includes a reciprocating block, which is threadedly connected to the annular surface of the reciprocating thread groove. A cylinder is installed on the side of the reciprocating block facing the grinding block. The cylinder is sleeved on the annular surface of the connecting rod. A ring is installed at the end of the cylinder away from the reciprocating block. The ring is arranged in the annular groove. One end of the reciprocating block away from the cylinder is inserted into the pressing member.

[0009] Further, the pressing member includes a rectangular cylinder, which is installed on the lower surface of the bracket. A contraction member is installed at the inner top of the rectangular cylinder. One end of the reciprocating block away from the grinding block is inserted into the rectangular cylinder. A first one-way valve that only allows air to enter the rectangular cylinder is installed on the upper surface of the reciprocating block. A second one-way valve that can only discharge the gas in the rectangular cylinder is installed on the side of the rectangular cylinder. The output end of the second one-way valve is installed with a connecting pipe. The end of the connecting pipe away from the second one-way valve extends to the feeding hole. A lifting plate is slidably connected in the feeding hole. An exhaust groove is opened on the upper side in the feeding port. The lifting plate is in sliding contact with the first feeding pipe.

[0010] Further, the contraction member includes a pressure-receiving plate, which is slidably connected to the inner top of the rectangular cylinder. A plurality of first elastic members are installed on the surface of the pressure-receiving plate facing the inner top of the rectangular cylinder. The moving ends of the first elastic members away from the pressure-receiving plate are installed on the inner top of the rectangular cylinder.

[0011] Further, a scraping plate is installed on the annular surface of the grinding block. A first groove is opened on the side of the scraping plate that is consistent with the rotation direction of the grinding block. A filter screen is installed at the bottom of the first groove. A feeding port is opened on the annular surface of the grinding barrel. A first vertical groove is opened at the inner top of the feeding port. An intercepting member is arranged in the first vertical groove. The upper surface of the scraping plate is in sliding contact with the intercepting member. A second feeding pipe is installed on the side of the feeding port facing the outside of the grinding barrel. The end of the second feeding pipe away from the feeding port communicates with the first feeding pipe.

[0012] Further, the intercepting member includes a first intercepting plate, which is slidably connected in the first vertical groove. A plurality of second elastic members are installed on the side of the first intercepting plate facing the inside of the first vertical groove. The ends of the second elastic members away from the first intercepting plate are installed in the first vertical groove. A lifting block is installed on the side of the first intercepting plate facing the inside of the grinding barrel. The lower surface of the lifting block is in sliding contact with the upper surface of the scraping plate.

[0013] Further, a discharge port is arranged on the side of the feeding port facing the rotation direction of the scraping plate. A second vertical groove is opened at the inner top of the discharge port. A second intercepting plate is inserted into the second vertical groove. A plurality of third elastic members are installed on the side of the second intercepting plate facing the inside of the second vertical groove. The ends of the third elastic members away from the second intercepting plate are installed in the second vertical groove. An inclined plate is installed on the side of the second intercepting plate facing the inside of the grinding barrel. The inclined plate is in sliding contact with the scraping plate.

[0014] Further, an intercepting net is installed on the upper surface of the grinding barrel.

[0015] Further, a sealing block is installed on the lower surface of the grinding barrel, and the sealing block is inserted into the feed hole.

[0016] The present invention provides a fully externally circulating vertical cement mill, which has the following beneficial effects: This fully externally circulating vertical cement mill uses the mutual cooperation between multiple components and can not only...

[0017] 1. In the present invention, a pulling structure composed of a reciprocating block, a cylinder and a ring is threadedly connected in a reciprocating thread groove opened on the annular surface of the connecting rod, and the pulling structure is used to drive the grinding block to be indirectly lifted. The grinding block is lifted during rotation for feeding, thereby increasing the contact between the cement and the grinding block, and thus improving the grinding efficiency of the cement.

[0018] 2. In the present invention, the reciprocating block is slidably connected in the rectangular cylinder. When the reciprocating block moves upward, it squeezes the space inside the rectangular cylinder. When the grinding block is lifted, the air squeezed inside the rectangular cylinder is released, so that the lifting plate is raised for feeding, thus saving the use of the feeding mechanism. And the thrust generated when the air enters the bottom of the grinding barrel can disperse the ground cement around, facilitating the grinding block to grind the subsequently entering cement.

[0019] 3. In the present invention, a feed port is opened on the annular surface of the grinding barrel, and the lower surface of the lifting block that closes the feed port is in sliding contact with the upper surface of the sliding plate. When the grinding block is lifted, the scraping plate is driven to open the feed port, so that the cement that does not meet the crushing requirements collected on the scraping plate re-enters the first feed pipe for secondary grinding, thereby increasing the qualified rate of cement grinding.

[0020] 4. In the present invention, a discharge port is arranged on one side of the feed port facing the rotation direction of the scraping plate. After the scraping plate filters the crushed cement, it enters the discharge port for discharge, thereby ensuring that the discharged cement meets the crushing standard and ensuring the crushing qualified rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an exploded view of a fully externally circulating vertical cement mill of the present invention;

[0022] Figure 2 is an assembly schematic diagram of the grinding barrel and the grinding block of a fully externally circulating vertical cement mill of the present invention;

[0023] Figure 3 is an assembly structure schematic diagram of the second sealing plate and the inclined plate of a fully externally circulating vertical cement mill of the present invention;

[0024] Figure 4Schematic diagram of the assembly of the reciprocating plate and the rectangular cylinder of a fully externally circulating vertical cement mill according to the present invention;

[0025] Figure 5 Schematic diagram of the assembly of the connecting rod and the reciprocating block of a fully externally circulating vertical cement mill according to the present invention;

[0026] Figure 6 Schematic diagram of the assembly of the reciprocating block, the cylinder and the ring of a fully externally circulating vertical cement mill according to the present invention;

[0027] Figure 7 Schematic diagram of the structure of the scraper of a fully externally circulating vertical cement mill according to the present invention;

[0028] Figure 8 Schematic diagram of the assembly of the rectangular block, the ring and the grinding block of a fully externally circulating vertical cement mill according to the present invention.

[0029] In the figure: 1, grinding barrel; 2, cylinder; 3, grinding block; 4, ring; 5, connecting pipe; 6, reciprocating block; 7, rectangular cylinder; 8, support; 9, servo motor; 10, intercepting net; 11, material box; 12, second feed pipe; 13, first feed pipe; 14, sealing block; 15, lifting plate; 16, rectangular groove; 17, annular groove; 18, first intercepting plate; 19, lifting block; 20, second intercepting plate; 21, inclined plate; 22, third elastic member; 23, pressure receiving plate; 24, first elastic member; 25, first one-way valve; 26, second one-way valve; 27, reciprocating thread groove; 28, rectangular block; 29, connecting rod; 30, filter net; 31, scraper; 32, exhaust groove. Detailed implementation manners

[0030] Please refer to Figures 1 to 7 , the present invention provides a technical solution: a fully externally circulating vertical cement mill, including a grinding barrel 1, a grinding block 3 is arranged inside the grinding barrel 1, a support 8 is installed on the upper surface of the grinding barrel 1, a servo motor 9 is installed on the support 8, a connecting rod 29 is installed at the output end of the servo motor 9, a rectangular block 28 is installed at the end of the connecting rod 29 away from the servo motor 9, a rectangular groove 16 and an annular groove 17 are opened on the upper surface of the grinding block 3, the rectangular block 28 is inserted into the rectangular groove 16, start the servo motor 9 to drive the connecting rod 29 to rotate, the connecting rod 29 rotates to drive the rectangular block 28 to rotate, and since the rectangular block 28 is restricted by the rectangular groove 16, the rectangular block 28 rotates to drive the grinding block 3 to rotate and grind.

[0031] The annular surface of the connecting rod 29 is provided with a reciprocating thread groove 27. The annular surface of the reciprocating thread groove 27 is threadedly connected with a reciprocating block 6. One side of the reciprocating block 6 facing the grinding block 3 is provided with a cylinder 2. The cylinder 2 is sleeved on the annular surface of the connecting rod 29. One end of the cylinder 2 away from the reciprocating block 6 is provided with a ring 4. The ring 4 is arranged in the annular groove 17. When the connecting rod 29 rotates, it drives the reciprocating block 6 to rise in position on the annular surface of the connecting rod 29. At this time, the ring 4 is in rotational contact with the annular groove 17, so it will not affect the rotation of the grinding block 3. When the reciprocating block 6 moves to a specified height, the ring 4 contacts the top of the annular groove 17. At this time, when the reciprocating block 6 continues to move upward, it will drive the grinding block 3 to rise in position, and use the lifted gap for feeding, thereby increasing the contact between the cement and the grinding block 3, so as to improve the grinding efficiency and grinding qualification rate of the cement.

[0032] A material box 11 is arranged on the annular surface of the grinding barrel 1. The bottom of the grinding barrel 1 is provided with a feed hole. A first feed pipe 13 is arranged between the material box 11 and the feed hole. A rectangular cylinder 7 is installed on the lower surface of the bracket 8. One end of the reciprocating block 6 away from the grinding block 3 is inserted into the rectangular cylinder 7. A pressure receiving plate 23 is arranged at the top inside the rectangular cylinder 7. A plurality of first elastic members 24 are installed on the surface of the pressure receiving plate 23 facing the top inside the rectangular cylinder 7. The first elastic member 24 is a spring. The first elastic member 24 is in a normal state. The moving end of the first elastic member 24 away from the pressure receiving plate 23 is installed on the top inside the rectangular cylinder 7. A first one-way valve 25 that only allows air to enter the rectangular cylinder 7 is installed on the upper surface of the reciprocating block 6. A second one-way valve 26 that can only discharge the gas inside the rectangular cylinder 7 is installed on the side of the rectangular cylinder 7. The output end of the second one-way valve 26 is provided with a connecting pipe 5. One end of the connecting pipe 5 away from the second one-way valve 26 extends to the position of the feed hole. A lifting plate 15 is slidably connected inside the feed hole. An exhaust groove 32 is opened on the upper side inside the feed port. The lifting plate 15 is in sliding contact with the first feed pipe 13.

[0033] When the reciprocating block 6 moves upward inside the rectangular cylinder 7, it will squeeze the air inside the rectangular cylinder 7. When the grinding block 3 is lifted, the squeezed air inside the rectangular cylinder 7 is released, so that the lifting plate 15 rises in position for feeding, thus saving the use of the feeding mechanism. And the thrust generated when the air enters the bottom of the grinding barrel 1 can disperse the ground cement around, which is convenient for the grinding block 3 to grind the subsequent incoming cement. When the lifting plate 15 is lifted, it blocks the first feed pipe 13. When the position of the lifting plate 15 is restored, the first feed pipe 13 is reopened.

[0034] The annular surface of the grinding block 3 is provided with a scraping plate 31. A first groove is formed on one side of the scraping plate 31 that is in the same rotation direction as the grinding block 3. A filter screen 30 is installed at the bottom of the first groove. The annular surface of the grinding barrel 1 is provided with a feed inlet. A first vertical groove is formed at the top inside the feed inlet. A first intercepting plate 18 is inserted into the first vertical groove. A plurality of second elastic members are installed on one side of the first intercepting plate 18 facing the inside of the first vertical groove. The second elastic members are springs. The second elastic members are in a normal state. The ends of the second elastic members away from the first intercepting plate 18 are installed in the first vertical groove. A lifting block 19 is installed on one side of the first intercepting plate 18 facing the inside of the grinding barrel 1. The lower surface of the lifting block 19 is in sliding contact with the upper surface of the scraping plate 31. A second feed pipe 12 is installed on one side of the feed inlet facing the outside of the grinding barrel 1. The end of the second feed pipe 12 away from the feed inlet communicates with the first feed pipe 13.

[0035] When the grinding block 3 is lifted, it drives the scraping plate 31 to contact the lifting block 19, thereby driving the first sealing plate to move upward to open the feed inlet. Subsequently, the cement that has not reached the crushing requirement collected on the scraping plate 31 re-enters the first feed pipe 13 for secondary grinding, thereby increasing the qualified rate of cement grinding.

[0036] A discharge port is arranged on one side of the feed inlet facing the rotation direction of the scraping plate 31. A second vertical groove is formed at the top inside the discharge port. A second intercepting plate 20 is inserted into the second vertical groove. A plurality of third elastic members 22 are installed on one side of the second intercepting plate 20 facing the inside of the second vertical groove. The third elastic members 22 are springs. The third elastic members 22 are in a normal state. The ends of the third elastic members 22 away from the second intercepting plate 20 are installed in the second vertical groove. An inclined plate 21 is installed on one side of the second intercepting plate 20 facing the inside of the grinding barrel 1. The inclined plate 21 is in sliding contact with the scraping plate 31.

[0037] A discharge port is arranged on one side of the feed inlet facing the rotation direction of the scraping plate 31. After the scraping plate 31 filters the crushed cement, it enters the discharge port and is discharged, thereby ensuring that the discharged cement meets the crushing standard and ensuring the qualified rate of cement crushing.

[0038] In order to prevent the cement ground into powder from being blown out of the grinding barrel 1 by air, an intercepting net 10 is installed on the upper surface of the grinding barrel 1. In order to prevent the cement entering the grinding barrel 1 from falling back into the feed hole again, a sealing block 14 is installed on the lower surface of the grinding barrel 1. The sealing block 14 is inserted into the feed hole.

[0039] In summary, for the all-external-circulation vertical cement mill, during use, first start the servo motor 9 to drive the connecting rod 29 to rotate. After the connecting rod 29 rotates, it drives the grinding block 3 to rotate through the rectangular block 28, thereby grinding the cement at the bottom of the grinding barrel 1. However, when the connecting rod 29 rotates, it also drives the reciprocating block 6 to move up and down through the reciprocating thread groove 27. When the reciprocating block 6 moves upward, it will drive the cylinder 2 and the ring 4 to move upward together. When the ring 4 moves to the highest point of the annular groove 17, the upward movement of the reciprocating block 6 will drive the position of the grinding block 3 to rise, separating the sealing block 14 from the feed hole.

[0040] While the reciprocating block 6 moves upward, it squeezes the space inside the rectangular cylinder 7. When the position of the grinding block 3 rises and the sealing block 14 is separated from the feed hole, the air squeezed inside the rectangular cylinder 7 enters the feed hole through the connecting pipe 5, and lifts the lifting plate 15, pushing the cement in the feed hole into the grinding barrel 1. The ground cement is dispersed around the grinding barrel 1, and then gradually rises under the drive of the upward movement of the grinding block 3, and finally reaches the discharge port and is discharged.

[0041] During the subsequent rotation of the grinding block 3, the scraper 31 contacts the ground cement and scrapes the cement into the groove. Then, the filter screen 30 installed in the groove filters the cement that does not meet the crushing requirements. When the grinding block 3 rises, the scraper 31 opens the feed port, and the cement that does not meet the crushing requirements is discharged back into the first feed pipe 13 through the second feed pipe 12, so that the cement that does not meet the crushing requirements is ground again. At the same time, during the rotation of the scraper 31, it contacts the inclined block and opens the discharge port, so that the cement that meets the crushing requirements is discharged from the discharge port.

[0042] When the reciprocating block 6 moves to the highest point of the reciprocating thread groove 27 and then moves downward on the annular surface of the connecting rod 29, air is filled into the rectangular cylinder 7 through the second one-way valve 26. At the same time, the ring 4 is driven by the cylinder 2 to move downward and no longer contacts the top of the annular groove 17. At this time, the grinding block 3 contacts the bottom of the grinding barrel 1 again.

[0043] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

Claims

1. A fully externally circulated vertical cement mill, characterized in that, It includes a grinding barrel (1), a grinding block (3) is arranged inside the grinding barrel (1), a bracket (8) is installed on the upper surface of the grinding barrel (1), a servo motor (9) is installed on the bracket (8), a connecting piece is installed at the output end of the servo motor (9), a rectangular groove (16) and an annular groove (17) are formed on the upper surface of the grinding block (3), and the end of the connecting piece away from the servo motor (9) is inserted into the rectangular groove (16) and the annular groove (17). A material box (11) is arranged on the annular surface of the grinding barrel (1), a feed hole is formed at the bottom of the grinding barrel (1), and a first feed pipe (13) is arranged between the material box (11) and the feed hole. An extrusion piece is arranged at the end of the connecting piece away from the grinding block (3), the extrusion piece is connected to the bracket (8), and the end of the extrusion piece away from the connecting piece is arranged in the feed hole. The connecting piece includes a connecting rod (29), the connecting rod (29) is installed at the output end of the servo motor (9), a rectangular block (28) is installed at the end of the connecting rod (29) away from the servo motor (9), and the rectangular block (28) is inserted into the rectangular groove (16). A reciprocating thread groove (27) is formed on the annular surface of the connecting rod (29), and a pulling piece is threadedly connected to the annular surface of the reciprocating thread groove (27). One end of the pulling piece is inserted into the annular groove (17), and the end of the pulling piece away from the annular groove (17) is connected to the extrusion piece. The pulling piece includes a reciprocating block (6), the reciprocating block (6) is threadedly connected to the annular surface of the reciprocating thread groove (27), a cylinder (2) is installed on the side of the reciprocating block (6) facing the grinding block (3), the cylinder (2) is sleeved on the annular surface of the connecting rod (29), a ring (4) is installed at the end of the cylinder (2) away from the reciprocating block (6), and the ring (4) is arranged in the annular groove (17). The end of the reciprocating block (6) away from the cylinder (2) is inserted into the extrusion piece. The extrusion piece includes a rectangular cylinder (7), the rectangular cylinder (7) is installed on the lower surface of the bracket (8), a contraction piece is installed at the top inside the rectangular cylinder (7), the end of the reciprocating block (6) away from the grinding block (3) is inserted into the rectangular cylinder (7), a first one-way valve (25) that only allows air to enter the rectangular cylinder (7) is installed on the upper surface of the reciprocating block (6), a second one-way valve (26) that can only discharge the gas inside the rectangular cylinder (7) is installed on the side of the rectangular cylinder (7), a connecting pipe (5) is installed at the output end of the second one-way valve (26), and the end of the connecting pipe (5) away from the second one-way valve (26) extends to the feed hole. A lifting plate (15) is slidably connected in the feed hole, and the lifting plate (15) is in sliding contact with the first feed pipe (13). The contraction piece includes a pressure receiving plate (23), the pressure receiving plate (23) is slidably connected to the top inside the rectangular cylinder (7), a plurality of first elastic pieces (24) are installed on the side of the pressure receiving plate (23) facing the top inside the rectangular cylinder (7), and the first elastic pieces (24) are movably installed at the top inside the rectangular cylinder (7) away from the pressure receiving plate (23).

2. The vertical cement mill with full external circulation according to claim 1, characterized in that, A scraping plate (31) is mounted on the annular surface of the grinding block (3). A first groove is formed on one side of the scraping plate (31) that is in the same rotation direction as the grinding block (3). A filter screen (30) is mounted on the bottom of the first groove. An inlet is formed on the annular surface of the grinding barrel (1). An exhaust groove (32) is formed above the inlet. A first vertical groove is formed at the top inside the inlet. An intercepting member is arranged in the first vertical groove. The upper surface of the scraping plate (31) is in sliding contact with the intercepting member. A second feed pipe (12) is mounted on the side of the inlet facing away from the grinding barrel (1). One end of the second feed pipe (12) away from the inlet communicates with the first feed pipe (13).

3. The vertical cement mill with full external circulation according to claim 2, characterized in that, The intercepting member includes a first intercepting plate (18). The first intercepting plate (18) is slidably connected in the first vertical groove. A plurality of second elastic members are mounted on the side of the first intercepting plate (18) facing inside the first vertical groove. One end of the second elastic member away from the first intercepting plate (18) is mounted in the first vertical groove. A lifting block (19) is mounted on the side of the first intercepting plate (18) facing inside the grinding barrel (1). The lower surface of the lifting block (19) is in sliding contact with the upper surface of the scraping plate (31).

4. The vertical cement mill with full external circulation according to claim 3, characterized in that, A discharge port is arranged on the side of the inlet facing the rotation direction of the scraping plate (31). A second vertical groove is formed at the top inside the discharge port. A second intercepting plate (20) is inserted in the second vertical groove. A plurality of third elastic members (22) are mounted on the side of the second intercepting plate (20) facing inside the second vertical groove. One end of the third elastic member (22) away from the second intercepting plate (20) is mounted in the second vertical groove. An inclined plate (21) is mounted on the side of the second intercepting plate (20) facing inside the grinding barrel (1). The inclined plate (21) is in sliding contact with the scraping plate (31).

5. A fully externally circulated vertical cement mill according to claim 1, characterized in that, An intercepting net (10) is mounted on the upper surface of the grinding barrel (1).

6. The vertical cement mill with a full outer circulation according to claim 1, characterized in that, A sealing block (14) is mounted on the lower surface of the grinding barrel (1). The sealing block (14) is inserted into the feed hole.

Images