Full external circulation cement vertical mill

Abstract

The invention discloses a full external circulation cement vertical mill, and relates to the technical field of grinding, the full external circulation cement vertical mill comprises a grinding barrel, a grinding block is arranged in the grinding barrel, a connecting piece is mounted at the output end of a servo motor, a rectangular groove and an annular groove are formed in the upper surface of the grinding block, and the end, away from the servo motor, of the connecting piece is inserted into the rectangular groove and the annular groove; a material box is arranged on the annular surface of the grinding barrel, a feeding hole is formed in the bottom of the grinding barrel, a first feeding pipe is arranged between the material box and the feeding hole, an extrusion piece is arranged at the end, away from the grinding block, of the connecting piece and connected with the support, and the end, away from the connecting piece, of the extrusion piece is arranged in the feeding hole. According to the cement grinding device, the annular surface of the connecting rod is connected with the pulling structure, the pulling structure is used for driving the grinding block to be indirectly lifted for feeding, the cement grinding efficiency is improved, the reciprocating block extrudes the space in the rectangular barrel when moving upwards, the position of the lifting plate is lifted for feeding, and therefore the use of a feeding mechanism is saved.

Description

Technical Field

[0001] The invention relates to the technical field of grinding, in particular to a full external circulation cement vertical mill. Background Art

[0002] Cement becomes a slurry when mixed with water. It can harden in the air or in water, and can firmly bond sand, stone and other materials together. It is the main building material. Cement mill is the key equipment for crushing materials after they are broken. Ball mills are widely used in cement, non-ferrous metal beneficiation, glass and ceramics and other production industries.

[0003] The traditional vertical mill uses feeding from the top, and then uses multiple grinding rollers installed on the side to grind the incoming material. Since the grinding roller only has one point in contact with the material on the grinding table, the grinding efficiency of the material is low, and the ground cement is discharged using the height difference. When discharging in this way, it is easy to cause the material that does not meet the grinding requirements to be discharged prematurely, resulting in a low cement powder qualification rate.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a full external circulation cement vertical mill is proposed. Summary of the invention

[0005] The object of the present invention is to provide a full external circulation cement vertical mill to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a full external circulation cement vertical mill, comprising a grinding barrel, a grinding block is arranged in 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 on the output end of the servo motor, a rectangular groove and an annular groove are provided on the upper surface of the grinding block, the end of the connecting piece away from the servo motor is inserted into the rectangular groove and the annular groove, a material box is provided on the annular surface of the grinding barrel, a feeding hole is provided at the bottom of the grinding barrel, a first feeding pipe is provided between the material box and the feeding hole, an extrusion piece is provided on 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 provided in the feeding hole.

[0007] Furthermore, the connecting member includes a connecting rod, which 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, and the rectangular block is inserted in a rectangular groove. A reciprocating thread groove is opened on the annular surface of the connecting rod, and a pulling member is threadedly connected to the annular surface of the reciprocating thread groove. One end of the pulling member is inserted in the annular groove, and the end of the pulling member away from the annular groove is connected to the extrusion member.

[0008] Furthermore, 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 on the end of the cylinder away from the reciprocating block, the ring is arranged in the annular groove, and the end of the reciprocating block away from the cylinder is inserted into the extrusion member.

[0009] Furthermore, the extrusion member includes a rectangular cylinder, which is installed on the lower surface of the bracket, and a contraction member is installed on the top of the rectangular cylinder. The end of the reciprocating block away from the grinding block is inserted in the rectangular cylinder, and 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 gas in the rectangular cylinder is installed on the side of the rectangular cylinder. A connecting pipe is installed on the output end of the second one-way valve, and the end of the connecting pipe away from the second one-way valve extends to the feed hole. A lifting plate is slidably connected to the feed hole, and an exhaust groove is opened on the upper inner side of the feed port, and the lifting plate is in sliding contact with the first feed pipe.

[0010] Furthermore, the contraction member includes a pressure plate, which is slidably connected to the top of the rectangular tube. A plurality of first elastic members are installed on the surface of the pressure plate facing the top of the rectangular tube. The first elastic members are installed at the top of the rectangular tube away from the movement of the pressure plate.

[0011] Furthermore, a scraper is installed on the annular surface of the grinding block, a first groove is provided on the side of the scraper which is consistent with the rotation direction of the grinding block, a filter screen is installed on the bottom of the first groove, a feed port is provided on the annular surface of the grinding barrel, a first vertical groove is provided on the top of the feed port, an intercepting member is provided in the first vertical groove, the upper surface of the scraper is in sliding contact with the intercepting member, a second feed pipe is installed on the side of the feed port facing the outside of the grinding barrel, and the end of the second feed pipe away from the feed port is connected to the first feed pipe.

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

[0013] Furthermore, a discharge port is provided on the side of the feed port facing the rotation direction of the scraper, a second vertical groove is opened on the top of the discharge port, a second intercepting plate is inserted in the second vertical groove, a plurality of third elastic members are installed on the side of the second intercepting plate facing the second vertical groove, one end of the third elastic member away from the second intercepting plate is installed in the second vertical groove, and an inclined plate is installed on the side of the second intercepting plate facing the grinding barrel, and the inclined plate is in sliding contact with the scraper.

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

[0015] Furthermore, 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 invention provides a full external circulation cement vertical mill, which has the following beneficial effects: the full external circulation cement vertical mill adopts the mutual cooperation between multiple components, which can not only...

[0017] 1. The present invention connects a pulling structure consisting of a reciprocating block, a cylinder and a ring by threading in a reciprocating thread groove provided on the annular surface of a connecting rod, and utilizes the pulling structure to indirectly lift the grinding block, and utilizes the lifting of the grinding block during the rotation process to feed, thereby increasing the contact between cement and the grinding block, thereby improving the grinding efficiency of cement.

[0018] 2. The present invention connects the reciprocating block in a rectangular tube by sliding. The reciprocating block squeezes the space in the rectangular tube when it moves upward. When the grinding block is lifted, the squeezed air in the rectangular tube is released, so that the lifting plate is raised for feeding, thereby saving the use of the feeding mechanism. The thrust generated by the air when entering the bottom of the grinding barrel can blow the ground cement to all sides, making it easier for the grinding block to grind the cement that enters later.

[0019] 3. The present invention opens a feed port on the annular surface of the grinding barrel, and makes the lower surface of the lifting block that closes the feed port slide in contact with the upper surface of the slide plate. The moment when the grinding block is lifted drives the scraper to open the feed port, so that the cement collected on the scraper that does not meet the crushing requirements re-enters the first feed pipe for secondary grinding, thereby increasing the qualified rate of cement grinding.

[0020] 4. The present invention sets a discharge port on the side of the feed port facing the rotation direction of the scraper. After the scraper filters the crushed cement, it enters the discharge port for discharge, thereby ensuring that the discharged cement meets the crushing standard and the crushing qualification rate is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a disassembled diagram of a full external circulation vertical cement mill of the present invention; Figure 2 It is a schematic diagram of the assembly of a grinding barrel and a grinding block of a full external circulation vertical cement mill of the present invention; Figure 3 It is a schematic diagram of the assembly structure of the second sealing plate and the inclined plate of a full external circulation cement vertical mill of the present invention; Figure 4 It is a schematic diagram of the assembly of a reciprocating plate and a rectangular cylinder of a full external circulation vertical cement mill of the present invention; Figure 5It is a schematic diagram of the assembly of the connecting rod and the reciprocating block of a full external circulation vertical cement mill of the present invention; Figure 6 It is a schematic diagram of the assembly of the reciprocating block, cylinder and ring of a full external circulation vertical cement mill of the present invention; Figure 7 It is a structural schematic diagram of a scraper of a full external circulation vertical cement mill of the present invention; Figure 8 The present invention is a schematic diagram of the assembly of a rectangular block, a circular ring and a grinding block of a full external circulation vertical cement mill.

[0022] In the figure: 1. grinding barrel; 2. cylinder; 3. grinding block; 4. ring; 5. connecting pipe; 6. reciprocating block; 7. rectangular cylinder; 8. bracket; 9. servo motor; 10. interception 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 interception plate; 19. lifting block; 20. second interception plate; 21. inclined plate; 22. third elastic member; 23. pressure plate; 24. first elastic member; 25. first one-way valve; 26. second one-way valve; 27. reciprocating threaded groove; 28. rectangular block; 29. ​​connecting rod; 30. filter net; 31. scraper; 32. exhaust groove. DETAILED DESCRIPTION

[0023] See also Figures 1 to 7 The present invention provides a technical solution: a full external circulation cement vertical mill, comprising a grinding barrel 1, a grinding block 3 is arranged in 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 rod 29 is installed on the output end of the servo motor 9, a rectangular block 28 is installed on 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, the servo motor 9 is started to drive the connecting rod 29 to rotate, the connecting rod 29 rotates to drive the rectangular block 28 to rotate, and the rectangular block 28 is restricted by the rectangular groove 16, so the rotation of the rectangular block 28 will drive the grinding block 3 to rotate and grind.

[0024] A reciprocating thread groove 27 is provided on the annular surface of the connecting rod 29, and the annular surface of the reciprocating thread groove 27 is threadedly connected to the reciprocating block 6. A cylinder 2 is installed on the side of the reciprocating block 6 facing the grinding block 3, and the cylinder 2 is sleeved on the annular surface of the connecting rod 29. A ring 4 is installed on the end of the cylinder 2 away from the reciprocating block 6. The ring 4 is arranged in the annular groove 17. When the connecting rod 29 rotates, the reciprocating block 6 is driven to rise 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 is in contact with 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, and use the raised gap for feeding, thereby increasing the contact between cement and the grinding block 3, thereby improving the grinding efficiency and grinding pass rate of cement.

[0025] A material box 11 is provided on the annular surface of the grinding barrel 1, a feeding hole is provided at the bottom of the grinding barrel 1, a first feeding pipe 13 is provided between the material box 11 and the feeding hole, a rectangular cylinder 7 is installed on the lower surface of the bracket 8, the end of the reciprocating block 6 away from the grinding block 3 is inserted into the rectangular cylinder 7, a pressure plate 23 is provided on the top of the rectangular cylinder 7, and a plurality of first elastic members 24 are installed on the surface of the pressure plate 23 facing the top of the rectangular cylinder 7, the first elastic member 24 is a spring, the first elastic member 24 is in a normal state, the first elastic member 24 is away from The pressure plate 23 is installed on the top of the rectangular cylinder 7, and the upper surface of the reciprocating block 6 is provided with a first one-way valve 25 which only allows air to enter the rectangular cylinder 7. The side of the rectangular cylinder 7 is provided with a second one-way valve 26 which can only discharge the gas in the rectangular cylinder 7. A connecting pipe 5 is installed on the output end of the second one-way valve 26. The end of the connecting pipe 5 which is away from the second one-way valve 26 extends to the feed hole. A lifting plate 15 is slidably connected in the feed hole. An exhaust groove 32 is provided on the upper side of the feed port. The lifting plate 15 is in sliding contact with the first feed pipe 13.

[0026] When the reciprocating block 6 moves upward in the rectangular tube 7, it squeezes the air in the rectangular tube 7. When the grinding block 3 is lifted, the squeezed air in the rectangular tube 7 is released, so that the lifting plate 15 is raised for feeding, thereby saving the use of the feeding mechanism, and the thrust generated when the air enters the bottom of the grinding barrel 1 can blow the ground cement to the surroundings, so that the grinding block 3 can grind the subsequent cement. When the lifting plate 15 is lifted, the first feeding pipe 13 is blocked, and when the lifting plate 15 is restored to its original position, the first feeding pipe 13 is reopened.

[0027] A scraper 31 is installed on the annular surface of the grinding block 3, and a first groove is provided on the side of the scraper 31 which is consistent with the rotation direction of the grinding block 3, and a filter screen 30 is installed at the bottom of the first groove. A feed port is provided on the annular surface of the grinding barrel 1, and a first vertical groove is provided on the top of the feed port. The first intercepting plate 18 is inserted in the first vertical groove, and a plurality of second elastic members are installed on the side of the first intercepting plate 18 facing the first vertical groove. The second elastic member is a spring, and the second elastic member is in a normal state. The end of the second elastic member away from the first intercepting plate 18 is installed in the first vertical groove, and a lifting block 19 is installed on the side of the first intercepting plate 18 facing the grinding barrel 1, and the lower surface of the lifting block 19 is in sliding contact with the upper surface of the scraper 31. A second feed pipe 12 is installed on the side of the feed port facing the outside of the grinding barrel 1, and the end of the second feed pipe 12 away from the feed port is connected to the first feed pipe 13.

[0028] The moment when the grinding block 3 is lifted is used to drive the scraper 31 to contact the lifting block 19, thereby driving the first sealing plate to move upward to open the feed port. Subsequently, the cement that does not meet the crushing requirements collected on the scraper 31 re-enters the first feed pipe 13 for secondary grinding, thereby increasing the qualified rate of cement grinding.

[0029] A discharge port is provided on the side of the feed port facing the rotation direction of the scraper 31, and a second vertical groove is opened on the top of the discharge port. A second intercepting plate 20 is inserted in the second vertical groove, and a plurality of third elastic members 22 are installed on the side of the second intercepting plate 20 facing the second vertical groove. The third elastic member 22 is a spring. The third elastic member 22 is in a normal state. One end of the third elastic member 22 away from the second intercepting plate 20 is installed in the second vertical groove, and an inclined plate 21 is installed on the side of the second intercepting plate 20 facing the grinding barrel 1. The inclined plate 21 is in sliding contact with the scraper 31.

[0030] A discharge port is provided on the side of the feed port facing the rotation direction of the scraper 31. The scraper 31 filters the crushed cement and then discharges it into the discharge port, thereby ensuring that the discharged cement meets the crushing standard and the qualified rate of cement crushing is ensured.

[0031] In order to prevent the ground cement from being blown out of the grinding barrel 1 by air, an interception 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, a sealing block 14 is installed on the lower surface of the grinding barrel 1, and the sealing block 14 is inserted into the feed hole.

[0032] In summary, when this full external circulation vertical cement mill is used, the servo motor 9 is first started 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, and then grinds the cement at the bottom of the grinding barrel 1. However, when the connecting rod 29 rotates, it will also drive 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 reciprocating block 6 moves upward, which will drive the grinding block 3 to rise in position, so that the sealing block 14 is separated from the feed hole.

[0033] The reciprocating block 6 squeezes the space in the rectangular cylinder 7 while moving upward. When the grinding block 3 is raised and the sealing block 14 is separated from the feed hole, the air squeezed in the rectangular cylinder 7 enters the feed hole through the connecting pipe 5, and the lifting plate 15 is raised to push 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 driving force of the grinding block 3 being lifted upward, and finally reaches the discharge port to be discharged.

[0034] During the subsequent rotation of the re-grinding block 3, the scraper 31 contacts the ground cement and scrapes the cement into the groove, and then the filter screen 30 installed in the groove is used to filter the cement that does not meet the crushing requirements. When the grinding block 3 is raised, the scraper 31 opens the feed port, and the cement that does not meet the crushing requirements is discharged into the first feed pipe 13 through the second feed pipe 12, so that the cement that does not meet the crushing requirements is re-grinded. At the same time, the scraper 31 contacts the inclined block during the rotation process and opens the discharge port, so that the cement that meets the crushing requirements is discharged from the discharge port.

[0035] When the reciprocating block 6 moves to the highest point of the reciprocating thread groove 27 and moves downward on the annular surface of the connecting rod 29 again, 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.

[0036] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order 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 thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A full external circulation cement vertical mill, characterized in that: The invention comprises a grinding barrel (1), wherein a grinding block (3) is arranged in 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 on the output end of the servo motor (9), a rectangular groove (16) and an annular groove (17) are provided on the upper surface of the grinding block (3), an 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 provided on the annular surface of the grinding barrel (1), a feeding hole is provided at the bottom of the grinding barrel (1), a first feeding pipe (13) is provided between the material box (11) and the feeding hole, an extrusion piece is provided on 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 feeding hole.

2. A full external circulation cement vertical mill according to claim 1, characterized in that: The connecting member comprises a connecting rod (29), the connecting rod (29) being mounted at the output end of the servo motor (9), a rectangular block (28) being mounted at one end of the connecting rod (29) away from the servo motor (9), the rectangular block (28) being inserted into the rectangular groove (16), a reciprocating thread groove (27) being provided on the annular surface of the connecting rod (29), a pulling member being threadedly connected to the annular surface of the reciprocating thread groove (27), one end of the pulling member being inserted into the annular groove (17), and the end of the pulling member away from the annular groove (17) being connected to the extrusion member.

3. A full external circulation cement vertical mill according to claim 2, characterized in that: The pulling member comprises a reciprocating block (6), the reciprocating block (6) being threadedly connected to the annular surface of a reciprocating thread groove (27), a cylinder (2) being installed on the side of the reciprocating block (6) facing the grinding block (3), the cylinder (2) being sleeved on the annular surface of a connecting rod (29), a ring (4) being installed on the end of the cylinder (2) away from the reciprocating block (6), the ring (4) being arranged in the annular groove (17), and the end of the reciprocating block (6) away from the cylinder (2) being inserted into the extrusion member.

4. A full external circulation cement vertical mill according to claim 3, characterized in that: The extrusion component comprises a rectangular cylinder (7), wherein the rectangular cylinder (7) is mounted on the lower surface of the bracket (8), a contraction component is mounted on the top of the rectangular cylinder (7), an 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) is mounted on the upper surface of the reciprocating block (6) and only allows air to enter the rectangular cylinder (7), a second one-way valve (26) is mounted on the side of the rectangular cylinder (7) and only allows gas in the rectangular cylinder (7) to be discharged, a connecting pipe (5) is mounted on the output end of the second one-way valve (26), an end of the connecting pipe (5) away from the second one-way valve (26) extends to a feed hole, a lifting plate (15) is slidably connected to the feed hole, and the lifting plate (15) is in sliding contact with the first feed pipe (13).

5. A full external circulation cement vertical mill according to claim 4, characterized in that: The contraction member comprises a pressure plate (23), the pressure plate (23) being slidably connected to the inner top of the rectangular tube (7), a plurality of first elastic members (24) being installed on a surface of the pressure plate (23) facing the inner top of the rectangular tube (7), the first elastic members (24) being installed at the inner top of the rectangular tube (7) so as to move away from the pressure plate (23).

6. A full external circulation cement vertical mill according to claim 1, characterized in that: The grinding block (3) is provided with a scraper (31) on its annular surface, a first groove is provided on the side of the scraper (31) that is in the same rotation direction as the grinding block (3), a filter screen (30) is provided on the bottom of the first groove, a feed port is provided on the annular surface of the grinding barrel (1), an exhaust groove (32) is provided on the upper side of the feed port, a first vertical groove is provided on the top of the feed port, an interception member is provided in the first vertical groove, the upper surface of the scraper (31) is in sliding contact with the interception member, a second feed pipe (12) is provided on the side of the feed port that faces the outside of the grinding barrel (1), and an end of the second feed pipe (12) that is away from the feed port is communicated with the first feed pipe (13).

7. A full external circulation cement vertical mill according to claim 6, characterized in that: The intercepting member comprises a first intercepting plate (18), the first intercepting plate (18) being slidably connected in a first vertical groove, a plurality of second elastic members being installed on a side of the first intercepting plate (18) facing the first vertical groove, an end of the second elastic member away from the first intercepting plate (18) being installed in the first vertical groove, and a lifting block (19) being installed on a side of the first intercepting plate (18) facing the grinding barrel (1), the lower surface of the lifting block (19) being in sliding contact with the upper surface of the scraper (31).

8. A full external circulation cement vertical mill according to claim 6, characterized in that: A discharge port is provided on the side of the feed port facing the rotation direction of the scraper (31), a second vertical groove is provided in the top of the discharge port, a second intercepting plate (20) is inserted in the second vertical groove, a plurality of third elastic members (22) are installed on the side of the second intercepting plate (20) facing the second vertical groove, an end of the third elastic member (22) away from the second intercepting plate (20) is installed in the second vertical groove, an inclined plate (21) is installed on the side of the second intercepting plate (20) facing the grinding barrel (1), and the inclined plate (21) is in sliding contact with the scraper (31).

9. A full external circulation cement vertical mill according to claim 1, characterized in that: An interception net (10) is installed on the upper surface of the grinding barrel (1).

10. A full external circulation cement vertical mill according to claim 1, characterized in that: A sealing block (14) is installed on the lower surface of the grinding barrel (1), and the sealing block (14) is inserted into the feed hole.

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