Drying and grinding device for producing 4-trifluoromethyl nicotinic acid

Abstract

The invention relates to the field of grinding devices, in particular to a drying and grinding device for 4-trifluoromethyl nicotinic acid production, which comprises a supporting seat, the top of the supporting seat is fixedly connected with a supporting sleeve, the top of the supporting sleeve is fixedly connected with a fixed sleeve, and the top of the fixed sleeve is sleeved with a cover plate. Supporting legs are fixedly connected to the four corners of the bottom of the supporting base, a discharging taper hole is formed in the supporting base in a penetrating mode, and a taper plug is movably inserted into the discharging taper hole. The bottom of the supporting seat is fixedly connected with a fixing frame, and the bottom of the fixing frame is fixedly connected with a supporting frame. When a second rotating shaft rotates, cooling liquid in a liquid inlet pipe can be pumped into a follow-up sealing sleeve through a spiral feeding blade and conveyed into a spiral through groove in a grinding roller along a first liquid guide pipe, and the cooling liquid can play an effective cooling effect on the grinding roller when penetrating through the spiral through groove; therefore, the problem that the quality of 4-trifluoromethyl nicotinic acid is affected due to overheating caused by friction of the grinding roller in the grinding process is solved.

Description

Technical Field

[0001] The invention relates to the field of grinding devices, in particular to a dry grinding device for producing 4-trifluoromethylnicotinic acid. Background Art

[0002] 4-Trifluoromethylnicotinic acid is mainly used as a pharmaceutical intermediate and pesticide intermediate. It is a key intermediate of flonicamid, a highly effective insecticide.

[0003] Since 4-trifluoromethylnicotinic acid is a white crystalline solid after drying, it needs to be ground before use. During the grinding process, a grinding device needs to be used to fully grind it. However, most of the existing grinding devices directly grind it by driving a grinding roller with a motor. During the grinding process, the grinding roller is heated due to friction with the inner wall of the grinding barrel and the 4-trifluoromethylnicotinic acid. When the temperature of the grinding roller is too high, the 4-trifluoromethylnicotinic acid will be overheated, resulting in a decrease in product quality. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a drying and grinding device for producing 4-trifluoromethylnicotinic acid.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a dry grinding device for producing 4-trifluoromethylnicotinic acid, comprising a support seat, a support sleeve is fixedly connected to the top of the support seat, a fixed sleeve is fixedly connected to the top of the support sleeve, a cover plate is sleeved on the top of the fixed sleeve, support feet are fixedly connected to the four corners of the bottom of the support seat, a material discharge tapered hole is penetrated through the support seat, and a tapered plug is movably inserted inside the material discharge tapered hole; The bottom of the support seat is fixedly connected with a fixing frame, the bottom of the fixing frame is fixedly connected with a supporting frame, a screw rod is threadedly inserted on the supporting frame, and the top of the screw rod is rotatably connected with a second rotating shaft; The inner bottom of the support seat is fixedly connected with a liquid inlet pipe, the top of the second rotating shaft movably passes through the fixed frame and movably extends to the inside of the liquid inlet pipe, the second rotating shaft is located on the shaft wall inside the liquid inlet pipe and is equipped with a spiral feeding blade, the top of the second rotating shaft passes through the support seat and is fixedly connected with an accompanying sealing sleeve, the liquid inlet pipe passes through one end of the support seat and extends to the inside of the accompanying sealing sleeve, the bottom of the accompanying sealing sleeve is fixedly connected with a first stroke sealing sleeve, the top of the support seat is provided with a matching first stroke ring groove corresponding to the first stroke sealing sleeve, and the first stroke sealing sleeve is movably plugged into the inside of the first stroke groove; The inner bottom of the accompanying sealing sleeve is provided with a bevel gear ring, which is fixedly connected to the top of the support seat, and a first liquid guide tube is rotatably inserted on the outer wall of the accompanying sealing sleeve, and the first liquid guide tube extends to the outer tube wall at one end of the interior of the accompanying sealing sleeve and is fixedly sleeved with a bevel gear, and the bevel gear is meshed and connected with the bevel gear ring, and one end of the first liquid guide tube extending out of the accompanying sealing sleeve is fixedly connected to a grinding roller, and a spiral groove is provided inside the grinding roller, and one end of the grinding roller away from the first liquid guide tube is fixedly connected to a second liquid guide tube, and the second liquid guide tube and the first liquid guide tube are both connected with the spiral groove, and a second stroke sealing sleeve is provided below the fixed sleeve, and the bottom of the fixed sleeve and the top of the support seat are both provided with a matching second stroke ring groove corresponding to the second stroke sealing sleeve, and the top and bottom of the second stroke sealing sleeve are respectively movably inserted into the corresponding second stroke ring groove, and the end of the second liquid guide tube away from the grinding roller passes through the second stroke sealing sleeve and extends to the cavity formed between the second stroke sealing sleeve and the support sleeve.

[0006] Specifically, a fixing plate is fixedly connected to the inner wall of the fixing frame, a servo motor is installed on the top of the fixing plate through a fixing frame, an output end of the servo motor is fixedly connected to a first rotating shaft through a coupling, and the other end of the first rotating shaft movably passes through the fixing plate and is fixedly connected to a first transmission wheel; The second rotating shaft is located between the liquid inlet pipe and the fixed frame and is sleeved with a second transmission wheel. The second transmission wheel is connected to the first transmission wheel through a transmission belt.

[0007] Specifically, the second rotating shaft is fixedly connected to a limiting block on the shaft wall below the liquid inlet pipe, and the second rotating shaft and the limiting block are both slidably connected to the second transmission wheel.

[0008] Specifically, the first transmission wheel and the second transmission wheel are both rotatably connected to the fixing frame.

[0009] Specifically, a toggle block is fixedly connected to the bottom of the screw rod.

[0010] Specifically, a drain pipe is fixedly connected to the outer wall of the support sleeve, and the drain pipe is communicated with the cavity formed between the second stroke sealing sleeve and the support sleeve.

[0011] Specifically, sealing blocks and sealing arc plates are rotatably sleeved at both ends of the grinding roller, and the sealing blocks and sealing arc plates are fixedly connected to the inner cylinder wall of the second stroke sealing sleeve and the outer cylinder wall of the accompanying sealing sleeve respectively.

[0012] Beneficial effects of the present invention: The dry grinding device for producing 4-trifluoromethylnicotinic acid of the present invention can drive the second rotating shaft to rotate through the transmission wheel set and the transmission belt by the servo motor arranged on the fixed frame at the bottom of the support seat. When the second rotating shaft rotates, the cooling liquid in the liquid inlet pipe can be pumped into the interior of the accompanying sealing sleeve through the spiral feeding blade and transported to the spiral groove inside the grinding roller along the first liquid guide pipe. When the cooling liquid passes through the spiral groove, it can effectively cool the grinding roller, thereby avoiding the problem that the grinding roller is overheated due to friction during the grinding process and affects the quality of 4-trifluoromethylnicotinic acid. When the second rotating shaft rotates, it can also drive the accompanying sealing sleeve to rotate. The accompanying sealing sleeve drives the grinding roller to revolve on the top of the support seat through the first liquid guide tube. While the grinding roller revolves, it can also rotate under the drive of the bevel gear and the bevel gear ring, thereby grinding 4-trifluoromethylnicotinic acid. In addition, the height of the second rotating shaft can also be adjusted by driving the screw rod to rotate through the toggle block. When the height of the second rotating shaft is adjusted, the accompanying sealing sleeve, the grinding roller and the second stroke sealing sleeve can be driven to rise and fall synchronously at the same time. When the height between the grinding roller and the support seat is adjusted, the size of the ground particles can be controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 A schematic diagram of the structure of a drying and grinding device for producing 4-trifluoromethylnicotinic acid provided by the present invention Figure 1 ; Figure 2 A schematic diagram of the structure of a drying and grinding device for producing 4-trifluoromethylnicotinic acid provided by the present invention Figure 2 ; Figure 3 A cross-sectional view of a drying and grinding device for producing 4-trifluoromethylnicotinic acid provided by the present invention; Figure 4 A schematic diagram of the structure of a support base in a drying and grinding device for producing 4-trifluoromethylnicotinic acid provided by the present invention; Figure 5 A schematic structural diagram of a second stroke sealing sleeve in a drying and grinding device for producing 4-trifluoromethylnicotinic acid provided by the present invention; Figure 6 The present invention provides a schematic structural diagram of a second rotating shaft in a drying and grinding device for producing 4-trifluoromethylnicotinic acid.

[0015] In the figure: 1. support seat; 2. support sleeve; 3. fixed sleeve; 4. cover plate; 5. fixed frame; 6. fixed plate; 7. support frame; 8. support foot; 9. servo motor; 10. first rotating shaft; 11. first transmission wheel; 12. second rotating shaft; 13. second transmission wheel; 14. transmission belt; 15. limit block; 16. screw rod; 17. toggle block; 18. liquid inlet pipe; 19. spiral feeding blade; 20. unloading cone hole; 21. cone plug; 22. accompanying sealing cylinder; 23. first stroke sealing sleeve; 24. first stroke annular groove; 25. bevel gear ring; 26. first liquid guide pipe; 27. bevel gear; 28. grinding roller; 29. ​​spiral through groove; 30. second stroke sealing sleeve; 31. second stroke annular groove; 32. second liquid guide pipe; 33. drain pipe; 34. sealing block; 35. sealing arc plate. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0017] like Figure 1-Figure 6 As shown, a dry grinding device for producing 4-trifluoromethylnicotinic acid according to the present invention comprises a support base 1, a support sleeve 2 is fixedly connected to the top of the support base 1, a fixed sleeve 3 is fixedly connected to the top of the support sleeve 2, a cover plate 4 is sleeved on the top of the fixed sleeve 3, support feet 8 are fixedly connected to the four corners of the bottom of the support base 1, a material discharge tapered hole 20 is penetrated through the support base 1, and a tapered plug 21 is movably inserted in the material discharge tapered hole 20; The bottom of the support seat 1 is fixedly connected with a fixing frame 5, the bottom of the fixing frame 5 is fixedly connected with a supporting frame 7, a screw rod 16 is threadedly inserted on the supporting frame 7, and the top of the screw rod 16 is rotatably connected with a second rotating shaft 12; The inner bottom of the support seat 1 is fixedly connected with a liquid inlet pipe 18, the top of the second rotating shaft 12 movably passes through the fixed frame 5 and movably extends to the inside of the liquid inlet pipe 18, the second rotating shaft 12 is located on the shaft wall inside the liquid inlet pipe 18 and is installed with a spiral feeding blade 19, the top of the second rotating shaft 12 passes through the support seat 1 and is fixedly connected with an accompanying sealing sleeve 22, the liquid inlet pipe 18 passes through one end of the support seat 1 and extends to the inside of the accompanying sealing sleeve 22, the bottom of the accompanying sealing sleeve 22 is fixedly connected with a first stroke sealing sleeve 23, the top of the support seat 1 is provided with a matching first stroke ring groove 24 corresponding to the first stroke sealing sleeve 23, and the first stroke sealing sleeve 23 is movably plugged into the inside of the first stroke groove 24; The inner bottom of the accompanying sealing sleeve 22 is provided with a bevel gear ring 25, which is fixedly connected to the top of the support seat 1. A first liquid guide tube 26 is rotatably inserted on the outer wall of the accompanying sealing sleeve 22. The first liquid guide tube 26 extends to the outer tube wall of one end of the accompanying sealing sleeve 22 and is fixedly sleeved with a bevel gear 27. The bevel gear 27 is meshed and connected with the bevel gear ring 25. One end of the first liquid guide tube 26 extending out of the accompanying sealing sleeve 22 is fixedly connected to a grinding roller 28, and a spiral through groove 29 is provided inside the grinding roller 28. The end of the grinding roller 28 away from the first liquid guide tube 26 is fixedly connected to a second guide tube 28. The liquid pipe 32, the second liquid guide pipe 32 and the first liquid guide pipe 26 are all connected to the spiral groove 29, and a second stroke sealing sleeve 30 is arranged below the fixed sleeve 3, and the bottom of the fixed sleeve 3 and the top of the support seat 1 are both provided with a matching second stroke annular groove 31 corresponding to the second stroke sealing sleeve 30, and the top and bottom of the second stroke sealing sleeve 30 are respectively movably inserted into the corresponding second stroke annular groove 31, and the end of the second liquid guide pipe 32 away from the grinding roller 28 passes through the second stroke sealing sleeve 30 and extends to the cavity formed between the second stroke sealing sleeve 30 and the support sleeve 2.

[0018] Specifically, a fixing plate 6 is fixedly connected to the inner wall of the fixing frame 5, a servo motor 9 is installed on the top of the fixing plate 6 through a fixing frame, an output end of the servo motor 9 is fixedly connected to a first rotating shaft 10 through a coupling, and the other end of the first rotating shaft 10 movably passes through the fixing plate 6 and is fixedly connected to a first transmission wheel 11; The second rotating shaft 12 is located between the liquid inlet pipe 18 and the fixed frame 5 and is sleeved with a second transmission wheel 13. The second transmission wheel 13 is connected to the first transmission wheel 11 through a transmission belt 14. The servo motor 9 can drive the second rotating shaft 12 to rotate through the transmission wheel group and the transmission belt 14.

[0019] Specifically, the second rotating shaft 12 is fixedly connected to a limit block 15 on the shaft wall below the liquid inlet pipe 18, and the second rotating shaft 12 and the limit block 15 are both slidably connected to the second transmission wheel 13, so that the screw rod 16 can push the second rotating shaft 12 to lift when rotating without affecting the second transmission wheel 13 driving the second rotating shaft 12 to rotate.

[0020] Specifically, the first transmission wheel 11 and the second transmission wheel 13 are both rotatably connected to the fixing frame 5, so that the second rotating shaft 12 will not affect the transmission of the transmission wheel set during the jacking process.

[0021] Specifically, a toggle block 17 is fixedly connected to the bottom of the screw rod 16 , and the toggle block 17 can make the screw rod 16 more convenient and labor-saving when rotating.

[0022] Specifically, a drain pipe 33 is fixedly connected to the outer wall of the support sleeve 2, and the drain pipe 33 is connected to the cavity formed between the second stroke sealing sleeve 30 and the support sleeve 2. The drain pipe 33 can discharge the coolant, and the discharged coolant can be pumped by the inlet pipe 18 for recycling after cooling.

[0023] Specifically, the two ends of the grinding roller 28 are rotatably sleeved with sealing blocks 34 and sealing arc plates 35, which are respectively fixedly connected to the inner cylinder wall of the second stroke sealing sleeve 30 and the outer cylinder wall of the accompanying sealing sleeve 22. The setting of the sealing block 34 and the sealing arc plate 35 can effectively avoid the problem of the grinding roller 28 missing some materials during the grinding process.

[0024] When in use, the cover plate 4 is opened, so that the 4-trifluoromethylnicotinic acid crystals to be ground are placed in the barrel body formed by the support seat 1 and the support sleeve 2, and then the cover plate 4 is closed; After the 4-trifluoromethylnicotinic acid is placed, the servo motor 9 can be started. When the servo motor 9 is started, it can drive the first transmission wheel 11 to rotate. When the first transmission wheel 11 rotates, it can drive the second transmission wheel 13 to rotate through the transmission belt 14. When the second transmission wheel 13 rotates, it can drive the second rotating shaft 12 to rotate. When the second rotating shaft 12 rotates, the coolant in the liquid inlet pipe 18 can be pumped to the inside of the accompanying sealing sleeve 22 through the spiral feeding blade 19 and transported to the spiral groove 29 inside the grinding roller 28 along the first liquid guide pipe 26. When the coolant passes through the spiral groove 29, it can effectively cool the grinding roller 28, thereby avoiding the problem that the grinding roller 28 is overheated due to friction during the grinding process and affects the quality of 4-trifluoromethylnicotinic acid. The coolant passing through the spiral groove 29 will be transported to the inside of the cavity by the second liquid guide pipe 32 and discharged by the drain pipe 33. When the second rotating shaft 12 rotates, it can also drive the accompanying sealing sleeve 22 to rotate. When the accompanying sealing sleeve 22 rotates, it can drive the grinding roller 28 to revolve on the top of the support seat 1 through the first liquid guide tube 26. While the grinding roller 28 revolves, it can also rotate under the drive of the bevel gear 27 and the bevel gear ring 25, so as to grind 4-trifluoromethylnicotinic acid. When the size of the abrasive particles needs to be controlled, the screw 16 is driven to rotate by the toggle block 17. The screw 16 can adjust the height of the second rotating shaft 12 when rotating. When the height of the second rotating shaft 12 is adjusted, the accompanying sealing sleeve 22, the grinding roller 28 and the second stroke sealing sleeve 30 can be driven to rise and fall synchronously. When the height between the grinding roller 28 and the support seat 1 is adjusted, the size of the abrasive particles can be controlled. After the grinding is completed, the servo motor 9 is turned off and the cover plate 4 is opened. After the cover plate 4 is opened, the cone plug 21 is removed, and the ground material can be discharged along the discharge cone hole 20.

[0025] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A dry grinding device for producing 4-trifluoromethylnicotinic acid, comprising a support base (1), a support sleeve (2) being fixedly connected to the top of the support base (1), a fixed sleeve (3) being fixedly connected to the top of the support sleeve (2), a cover plate (4) being sleeved on the top of the fixed sleeve (3), support feet (8) being fixedly connected to the four corners of the bottom of the support base (1), a material discharge conical hole (20) being penetrated through the support base (1), and a conical plug (21) being movably inserted into the inside of the material discharge conical hole (20); Features: The bottom of the support seat (1) is fixedly connected to a fixing frame (5), the bottom of the fixing frame (5) is fixedly connected to a support frame (7), a screw rod (16) is threadedly inserted on the support frame (7), and the top of the screw rod (16) is rotatably connected to a second rotating shaft (12); The inner bottom of the support seat (1) is fixedly connected to a liquid inlet pipe (18); the top of the second rotating shaft (12) movably passes through the fixed frame (5) and movably extends to the inside of the liquid inlet pipe (18); a spiral feeding blade (19) is installed on the shaft wall of the second rotating shaft (12) located inside the liquid inlet pipe (18); the top of the second rotating shaft (12) passes through the support seat (1) and is fixedly connected to an accompanying sealing sleeve (22); the liquid inlet pipe (18) passes through one end of the support seat (1) and extends to the inside of the accompanying sealing sleeve (22); the bottom of the accompanying sealing sleeve (22) is fixedly connected to a first stroke sealing sleeve (23); the top of the support seat (1) is provided with a matching first stroke ring groove (24) corresponding to the first stroke sealing sleeve (23); the first stroke sealing sleeve (23) is movably plugged into the inside of the first stroke groove (24); The inner bottom of the accompanying sealing sleeve (22) is provided with a bevel gear ring (25), and the bevel gear ring (25) is fixedly connected to the top of the support seat (1). A first liquid guide tube (26) is rotatably plugged on the outer wall of the accompanying sealing sleeve (22). A bevel gear (27) is fixedly sleeved on the outer tube wall of one end of the first liquid guide tube (26) extending to the inside of the accompanying sealing sleeve (22). The bevel gear (27) is meshingly connected with the bevel gear ring (25). One end of the first liquid guide tube (26) extending out of the accompanying sealing sleeve (22) is fixedly connected to a grinding roller (28), and a spiral through groove (29) is provided inside the grinding roller (28). The end of the grinding roller (28) away from the first liquid guide tube (26) is fixedly connected to the grinding roller (28). A second liquid guide tube (32) is connected, and the second liquid guide tube (32) and the first liquid guide tube (26) are both in communication with the spiral groove (29). A second stroke sealing sleeve (30) is arranged below the fixed sleeve (3). The bottom of the fixed sleeve (3) and the top of the support seat (1) are both provided with a second stroke annular groove (31) corresponding to the second stroke sealing sleeve (30), and the top and bottom of the second stroke sealing sleeve (30) are respectively movably plugged into the corresponding second stroke annular groove (31). The end of the second liquid guide tube (32) away from the grinding roller (28) passes through the second stroke sealing sleeve (30) and extends into a cavity formed between the second stroke sealing sleeve (30) and the support sleeve (2).

2. A drying and grinding device for producing 4-trifluoromethylnicotinic acid according to claim 1, characterized in that: A fixing plate (6) is fixedly connected to the inner wall of the fixing frame (5); a servo motor (9) is installed on the top of the fixing plate (6) via a fixing frame; an output end of the servo motor (9) is fixedly connected to a first rotating shaft (10) via a coupling; the other end of the first rotating shaft (10) movably passes through the fixing plate (6) and is fixedly connected to a first transmission wheel (11); The second rotating shaft (12) is located between the liquid inlet pipe (18) and the fixed frame (5), and a second transmission wheel (13) is sleeved on the shaft wall. The second transmission wheel (13) is connected to the first transmission wheel (11) through a transmission belt (14).

3. A drying and grinding device for producing 4-trifluoromethylnicotinic acid according to claim 2, characterized in that: The second rotating shaft (12) is fixedly connected to a limit block (15) on a shaft wall below the liquid inlet pipe (18), and the second rotating shaft (12) and the limit block (15) are both slidably connected to the second transmission wheel (13).

4. A drying and grinding device for producing 4-trifluoromethylnicotinic acid according to claim 2, characterized in that: The first transmission wheel (11) and the second transmission wheel (13) are both rotatably connected to the fixing frame (5).

5. A drying and grinding device for producing 4-trifluoromethylnicotinic acid according to claim 1, characterized in that: A toggle block (17) is fixedly connected to the bottom of the screw rod (16).

6. A drying and grinding device for producing 4-trifluoromethylnicotinic acid according to claim 1, characterized in that: A liquid discharge pipe (33) is fixedly connected to the outer wall of the support sleeve (2), and the liquid discharge pipe (33) is communicated with a cavity formed between the second stroke sealing sleeve (30) and the support sleeve (2).

7. A drying and grinding device for producing 4-trifluoromethylnicotinic acid according to claim 1, characterized in that: A sealing block (34) and a sealing arc plate (35) are rotatably sleeved on both ends of the grinding roller (28), and the sealing block (34) and the sealing arc plate (35) are respectively fixedly connected to the inner cylinder wall of the second stroke sealing sleeve (30) and the outer cylinder wall of the accompanying sealing sleeve (22).

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