High-purity diethyl carbonate production centrifugal equipment

Abstract

The invention belongs to the technical field of centrifugal equipment, and particularly relates to high-purity diethyl carbonate production centrifugal equipment which comprises a workbench, the upper end of the workbench is rotationally connected with a mounting ring, the upper end of the mounting ring is fixedly connected with a rotary drum, and the bottom end of the rotary drum fixedly communicates with a liquid discharging pipe; the liquid discharge pipe penetrates through and extends to the lower part of the workbench; the driving mechanism is used for driving the rotary drum to rotate so as to ensure that the solid impurities can be separated from the diethyl carbonate liquid; and the cleaning mechanism is used for cleaning the inner wall of the rotary drum after each time of work is completed. Through the arrangement of the bottom extending mechanism, when the elastic cleaning ring moves to the inner bottom wall of the rotary drum every time, the elastic cleaning ring can be attached to the inner wall of the rotary drum through abutting pushing of the inner bottom wall of the rotary drum to the abutting rod, and therefore the inner wall of the rotary drum is cleaned through subsequent upward movement of the elastic cleaning ring; it is guaranteed that dirt attached to the inner wall of the rotary drum can be scraped upwards, and it is guaranteed that the scraped dirt can be discharged out of the rotary drum.

Description

Technical Field

[0001] The present invention belongs to the technical field of centrifugal equipment, and particularly relates to a centrifugal equipment for the production of high-purity diethyl carbonate. Background Art

[0002] In the production process of high-purity diethyl carbonate, the centrifugal equipment is a key equipment for realizing the efficient separation of liquid and solid impurities, and its performance directly affects the product quality and production efficiency of diethyl carbonate. With the continuous increase in the demand for high-purity diethyl carbonate in the chemical industry, the technical requirements for centrifugal equipment are becoming increasingly stringent.

[0003] When the existing centrifugal equipment separates diethyl carbonate liquid and solid impurities, it usually makes different density substances settle or migrate in the drum through centrifugal force to achieve preliminary separation. However, this centrifugal equipment needs to clean the drum after each use, and there are the following technical problems: During the cleaning process of the existing centrifugal equipment, the cleaning component usually makes reciprocating vertical displacement, resulting in the dirt being easily left on the inner wall of the drum, and the cleaning effect is poor; At the same time, the dirt attached to the cleaning component itself is not easy to remove after cleaning. If it is not cleaned in time, it will cause secondary pollution to the drum during the next use, reducing the purification effect of diethyl carbonate. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems raised in the above background art, and provide a centrifugal equipment for the production of high-purity diethyl carbonate that can scrape the dirt attached to the inner wall of the drum upward.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A centrifugal equipment for the production of high-purity diethyl carbonate, comprising: A workbench, the upper end of the workbench is rotatably connected with an installation ring, the upper end of the installation ring is fixedly connected with a drum, the bottom end of the drum is fixedly communicated with a drain pipe, and the drain pipe penetrates and extends below the workbench; A driving mechanism for driving the drum to rotate to ensure that solid impurities can be separated from the diethyl carbonate liquid; A cleaning mechanism for cleaning the inner wall of the drum after each work. The cleaning mechanism includes two L-shaped rods fixedly connected to the upper end of the workbench. A top plate is fixedly connected between the two L-shaped rods. An electric telescopic rod is fixedly connected to the lower end of the top plate. The telescopic end of the electric telescopic rod is fixedly connected with an installation block. A rotating ring is arranged on the periphery of the installation block, and an elastic cleaning ring is arranged on the periphery of the rotating ring; A bottom extending mechanism for making the elastic cleaning ring extend when the rotating ring moves to the inner bottom wall of the drum.

[0006] Preferably, the driving mechanism includes a driving motor fixedly connected to the upper end of the workbench. A driving gear is fixedly connected to the output end of the driving motor. An annular tooth groove meshing with the driving gear is provided on the circumferential side wall of the mounting ring.

[0007] Preferably, the elastic cleaning ring is made of rubber material.

[0008] Preferably, the bottom extending mechanism includes a liquid storage cavity opened inside the rotating ring. A piston ring is hermetically and slidably connected inside the liquid storage cavity. A push rod is fixedly connected to both sides of the piston ring. The lower end of the push rod passes through the piston ring and the rotating ring and extends below the rotating ring. And the push rod is hermetically connected with the piston ring. An annular mounting frame is fixedly connected to the circumferential side wall of the rotating ring. The elastic cleaning ring is hermetically and slidably connected with the inner wall of the annular mounting frame. And a plurality of first springs distributed in a circumferential array are arranged between the elastic cleaning ring and the inner wall of the annular mounting frame. A liquid infusion pipe is fixedly communicated between the liquid storage cavity and the inside of the annular mounting frame.

[0009] Preferably, a liquid storage space is formed among the liquid storage cavity, the liquid infusion pipe and the annular mounting frame. And the liquid storage space is filled with hydraulic oil.

[0010] Preferably, a locking and resetting mechanism is arranged above the rotating ring, which is used to keep the extended state of the elastic cleaning ring unchanged when the elastic cleaning ring moves upward from the inner bottom wall of the drum, and to contract and reset the elastic cleaning ring after the elastic cleaning ring moves up to a specified position. The locking and resetting mechanism includes two support plates fixedly connected to the rotating ring. Second springs are arranged on the side walls of the two support plates close to each other. The end of each second spring far away from the support plate is fixedly connected with a ratchet plate. The upper end of the push rod extends above the rotating ring and is fixedly connected with a ratchet block cooperating with the two ratchet plates. The upper ends of the two ratchet plates are fixedly connected with outward expanding plates inclined upward. A U-shaped rod is arranged below the top plate. Two symmetrically arranged hinge rods are fixedly connected to the bottom end of the U-shaped rod. Two symmetrically arranged guide wheels are hinged between the two hinge rods. The two guide wheels are respectively in contact with and roll on the corresponding outward expanding plates.

[0011] Preferably, a limiting rod is fixedly connected to the side wall of the ratchet plate far away from the ratchet block. The limiting rod is slidably connected through the corresponding support plate.

[0012] Preferably, a rotating mechanism is provided on the circumferential side of the mounting block for driving the rotating ring to rotate synchronously when the rotating ring moves up and down. The rotating mechanism includes two limiting plates fixedly connected to the circumferential side wall of the mounting block. A toothed ring is rotatably connected between the two limiting plates. Two connecting rods are fixedly connected between the toothed ring and the rotating ring. The upper end of the lower limiting plate is rotatably connected with a rotating rod. A transmission gear is fixedly connected to the rotating rod at a position between the two limiting plates. The transmission gear meshes with the toothed ring. A threaded section is provided on the rod body of the rotating rod extending above the limiting plate. A threaded block is fixedly connected to the circumferential side wall of the electric telescopic rod. The threaded block is threadedly connected with the threaded section on the rotating rod. A transmission ring is rotatably connected to the lower end of the top disc. A transmission rod is fixedly connected between the connecting rod and the inner wall of the transmission ring.

[0013] Preferably, a descaling mechanism is provided on the circumferential side wall of the electric telescopic rod for removing the dirt attached to the elastic cleaning ring after each cleaning. The descaling mechanism includes an air storage cylinder fixedly connected to the circumferential side wall of the electric telescopic rod. A piston block is hermetically and movably connected in the air storage cylinder. The rotating rod extends into the air storage cylinder and is fixedly connected to the piston block. A cleaning box is provided on the circumferential side of the elastic cleaning ring. An air delivery pipe is fixedly connected and communicated between the cleaning box and the air storage cylinder. An air inlet pipe is fixedly connected to the upper end of the air storage cylinder. A one-way valve and an automatic pressure relief valve are respectively provided in the air inlet pipe and the air delivery pipe. A plurality of exhaust holes are formed in the inner wall of the cleaning box and are distributed in a circumferential array.

[0014] Compared with the existing technology, the advantages of this high-purity diethyl carbonate production centrifugal equipment are as follows: By setting the cleaning mechanism, after each centrifugation, the electric telescopic rod can be used to control the lifting movement of the mounting block and the rotating ring, so as to realize the cleaning work of the inner wall of the drum through the lifting movement of the elastic cleaning ring, without manual cleaning by the staff.

[0015] By setting the bottom extension mechanism, when the elastic cleaning ring moves to the inner bottom wall of the drum each time, the elastic cleaning ring can be pushed against the inner wall of the drum by the abutting of the inner bottom wall of the drum against the abutting rod, so as to clean the inner wall of the drum through the subsequent upward movement of the elastic cleaning ring, ensure that the dirt attached to the inner wall of the drum can be scraped upward, avoid the downward movement cleaning of the elastic cleaning ring, resulting in dirt remaining in the drum, ensure that the scraped dirt can be discharged from the drum, and thus ensure the cleaning effect of the drum.

[0016] In the present invention, by providing a locking and reset mechanism, when the elastic cleaning ring moves to the inner bottom wall of the drum, the two ratchet plates can limit the ratchet block, preventing the ratchet block from moving downward, thereby maintaining the state of the elastic cleaning ring in contact with the inner wall of the drum. When the electric telescopic rod drives the elastic cleaning ring to move upward to the initial position, the guide wheel will push the two outward expanding plates away from each other, enabling the ratchet block and the push rod to move downward and reset under the action of gravity, while the elastic cleaning ring resets under the elastic force of the first spring, ensuring that the elastic cleaning ring will not move downward in contact with the inner wall of the drum next time, thus ensuring the cleaning effect on the inner wall of the drum next time.

[0017] In the present invention, by providing a rotating mechanism, during the process of the electric telescopic rod driving the mounting block to perform vertical displacement, the rotating rod is enabled to rotate under the action of the threaded section, so that the elastic cleaning ring on the circumferential side of the rotating ring can rotate during the process of performing vertical displacement, thereby improving the scraping and cleaning effect of the elastic cleaning ring on the inner wall of the drum.

[0018] In the present invention, by providing a descaling mechanism, during the process of the rotating rod performing lifting motion, the piston block will be driven to perform lifting motion inside the air storage cylinder, thereby reciprocally discharging high-pressure gas through the air delivery pipe quickly into the cleaning box, enabling the air to impact on the circumferential side wall of the elastic cleaning ring, and performing self-cleaning on the elastic cleaning ring after each operation of the elastic cleaning ring, ensuring the cleaning effect of the elastic cleaning ring on the inner wall of the drum next time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the three-dimensional structure schematic diagram of the present invention; Figure 2 is the three-dimensional structure schematic diagram of another angle of the present invention; Figure 3 is the cross-sectional structure schematic diagram at the drum of the present invention; Figure 4 is Figure 3 the enlarged view of part A in Figure 5 is Figure 3 the enlarged view of part B in

[0020] In the figure: Workbench; 11, mounting ring; 12, drum; 13, drain pipe; Driving mechanism; 21, driving motor; 22, driving gear; 23, annular tooth groove; Cleaning mechanism; 31, L-shaped rod; 32, top plate; 33, electric telescopic rod; 34, mounting block; 35, rotating ring; 36, elastic cleaning ring; Bottom extension mechanism; 41, liquid storage cavity; 42, piston ring; 43, push rod; 44, annular mounting frame; 45, first spring; 46, infusion pipe; Locking and reset mechanism; 51. Support plate; 52. Second spring; 53. Ratchet plate; 54. Ratchet block; 55. Outer expansion plate; 56. U-shaped rod; 57. Hinge rod; 58. Guide wheel; Limit rod; Rotating mechanism; 71. Limit plate; 72. Tooth ring; 73. Connecting rod; 74. Rotating rod; 75. Transmission gear; 76. Threaded section; 77. Threaded block; 78. Transmission ring; 79. Transmission rod; Descaling mechanism; 81. Air storage cylinder; 82. Piston block; 83. Cleaning box; 84. Air delivery pipe. Specific implementation manner

[0021] The following embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Embodiment

[0022] Refer to Figure 1 , a centrifugal device for the production of high-purity diethyl carbonate, comprising: Workbench 1, the upper end of the workbench 1 is rotatably connected with an installation ring 11, the upper end of the installation ring 11 is fixedly connected with a rotating drum 12, the bottom end of the rotating drum 12 is fixedly communicated with a drain pipe 13, and the drain pipe 13 extends through to the lower part of the workbench 1; Drive mechanism 2, used to drive the rotating drum 12 to rotate to ensure that solid impurities can be separated from the diethyl carbonate liquid. The drive mechanism 2 includes a drive motor 21 fixedly connected to the upper end of the workbench 1, and a drive gear 22 is fixedly connected to the output end of the drive motor 21. An annular tooth groove 23 meshing with the drive gear 22 is provided on the circumferential side wall of the installation ring 11.

[0023] During actual use, the drive motor 21 can be used to drive the drive gear 22 to rotate, thereby driving the installation ring 11 and the rotating drum 12 to perform circular motion through the annular tooth groove 23. Under the action of centrifugal force, the mixed liquid in the rotating drum 12 makes the solid impurity particles with a larger density move towards the outer peripheral wall of the rotating drum 12, while the diethyl carbonate liquid with a smaller density is gathered in the central area of the rotating drum 12. After centrifugation, the diethyl carbonate liquid is discharged through the drain pipe 13 to achieve the purposes of separation, purification, etc.

[0024] Refer to Figures 1 to 4, a cleaning mechanism 3 for cleaning the inner wall of the drum 12 after each work is completed. The cleaning mechanism 3 includes two L-shaped rods 31 fixedly connected to the upper end of the workbench 1. A top plate 32 is fixedly connected between the two L-shaped rods 31. An electric telescopic rod 33 is fixedly connected to the lower end of the top plate 32. The telescopic end of the electric telescopic rod 33 is fixedly connected with a mounting block 34. A rotating ring 35 is arranged on the periphery of the mounting block 34. An elastic cleaning ring 36 is arranged on the periphery of the rotating ring 35. The elastic cleaning ring 36 is made of rubber material; It is worth mentioning that by setting the cleaning mechanism 3, after each centrifugation is completed, the electric telescopic rod 33 can be used to control the lifting movement of the mounting block 34 and the rotating ring 35, so as to realize the cleaning work of the inner wall of the drum 12 through the lifting movement of the elastic cleaning ring 36, without manual cleaning by the staff, and the operation is convenient.

[0025] Refer to Figure 2 and Figure 4 , a bottom extending mechanism 4 for making the elastic cleaning ring 36 extend when the rotating ring 35 moves to the inner bottom wall of the drum 12. The bottom extending mechanism 4 includes a liquid storage cavity 41 opened inside the rotating ring 35. A piston ring 42 is hermetically and slidably connected inside the liquid storage cavity 41. A resisting rod 43 is fixedly connected to both sides of the piston ring 42. The lower end of the resisting rod 43 passes through the piston ring 42 and the rotating ring 35 and extends below the rotating ring 35, and the resisting rod 43 is hermetically connected with the piston ring 42. An annular mounting frame 44 is fixedly connected to the peripheral side wall of the rotating ring 35. The elastic cleaning ring 36 is hermetically and slidably connected to the inner wall of the annular mounting frame 44, and a plurality of first springs 45 are arranged in a circumferential array between the elastic cleaning ring 36 and the inner wall of the annular mounting frame 44. A liquid infusion pipe 46 is fixedly connected between the liquid storage cavity 41 and the inside of the annular mounting frame 44.

[0026] Specifically, a liquid storage space is formed among the liquid storage cavity 41, the liquid infusion pipe 46 and the annular mounting frame 44, and the liquid storage space is filled with hydraulic oil.

[0027] In view of the problem that the dirt removed in the prior art is likely to remain inside the drum 12, resulting in poor cleaning effect, the present invention provides a bottom extension mechanism 4. Each time the elastic cleaning ring 36 moves to the inner bottom wall of the drum 12, the piston ring 42 can be pushed upward inside the liquid storage cavity 41 by the abutment of the inner bottom wall of the drum 12 against the abutting rod 43. The hydraulic oil in the space above the piston ring 42 inside the liquid storage cavity 41 is conveyed through the infusion pipe 46 into the annular mounting frame 44. Thus, the elastic cleaning ring 36 is pushed to expand and extend from the annular mounting frame 44 by the hydraulic pressure of the hydraulic oil, so that the elastic cleaning ring 36 fits the inner wall of the drum 12. After the elastic cleaning ring 36 moves to the inner bottom wall of the drum 12, the inner wall of the drum 12 can be cleaned by the subsequent upward movement of the elastic cleaning ring 36, ensuring that the dirt attached to the inner wall of the drum 12 can be scraped upward, avoiding the cleaning of the downward movement of the elastic cleaning ring 36, which may cause dirt to remain inside the drum 12, and ensuring that the scraped dirt can be discharged from the drum 12, thereby ensuring the cleaning effect of the drum 12.

[0028] Refer to Figure 1 and Figure 4 Above the rotating ring 35, there is a locking and resetting mechanism 5, which is used to keep the extended state of the elastic cleaning ring 36 unchanged when the elastic cleaning ring 36 moves upward from the inner bottom wall of the drum 12, and to contract and reset the elastic cleaning ring 36 after the elastic cleaning ring 36 moves up to a specified position. The locking and resetting mechanism 5 includes two support plates 51 fixedly connected to the rotating ring 35. On the side walls of the two support plates 51 close to each other, there are second springs 52. The ends of the second springs 52 away from the support plates 51 are fixedly connected with ratchet plates 53. The upper end of the abutting rod 43 extends above the rotating ring 35 and is fixedly connected with a ratchet block 54 that cooperates with the two ratchet plates 53. The upper ends of the two ratchet plates 53 are fixedly connected with outwardly expanding plates 55 that slope upward. Below the top plate 32, there is a U-shaped rod 56. The bottom end of the U-shaped rod 56 is fixedly connected with two symmetrically arranged hinge rods 57. Between the two hinge rods 57, there are two symmetrically arranged guide wheels 58, and the two guide wheels 58 are respectively in contact with and roll on the corresponding outwardly expanding plates 55.

[0029] Specifically, a limiting rod 6 is fixedly connected to the side wall of the ratchet plate 53 away from the ratchet block 54. The limiting rod 6 is slidably connected through the corresponding support plate 51. The limiting rod 6 limits the ratchet plate 53, so that the ratchet plate 53 can only move horizontally, ensuring the locking work of the two ratchet plates 53 on the ratchet block 54.

[0030] It should be noted that, by setting the locking and reset mechanism 5 in the present invention, when the elastic cleaning ring 36 moves to the inner bottom wall of the drum 12, the upward push of the inner bottom wall of the drum 12 on the abutting rod 43 can cause the abutting rod 43 to drive the ratchet block 54 to displace upward relative to the two ratchet plates 53. During the subsequent upward movement of the elastic cleaning ring 36, the two ratchet plates 53 can limit the ratchet block 54, preventing the ratchet block 54 from displacing downward, thereby maintaining the fitting state between the elastic cleaning ring 36 and the inner wall of the drum 12, ensuring the cleaning work of the elastic cleaning ring 36 on the inner wall of the drum 12. When the electric telescopic rod 33 drives the elastic cleaning ring 36 to move upward to the initial position, the guide wheels 58 on the articulated rod 57 will push the two outward expanding plates 55 away from each other, so that the two ratchet plates 53 move away from each other, enabling the ratchet block 54 and the abutting rod 43 to move downward and reset under the action of gravity, and the elastic cleaning ring 36 resets under the elastic force of the first spring 45, ensuring that the elastic cleaning ring 36 will not fit and displace downward along the inner wall of the drum 12 next time, thus ensuring the cleaning effect on the inner wall of the drum 12 next time.

[0031] Referring to Figure 2 , Figure 3 and Figure 5 , a rotating mechanism 7 is provided on the circumferential side of the mounting block 34 for driving the rotating ring 35 to rotate synchronously when the rotating ring 35 moves up and down. The rotating mechanism 7 includes two limiting plates 71 fixedly connected to the circumferential side wall of the mounting block 34. A toothed ring 72 is rotatably connected between the two limiting plates 71. Two connecting rods 73 are fixedly connected between the toothed ring 72 and the rotating ring 35. A rotating rod 74 is rotatably connected to the upper end of the lower limiting plate 71. A transmission gear 75 is fixedly connected to the position of the rotating rod 74 between the two limiting plates 71. The transmission gear 75 meshes with the toothed ring 72. A threaded section 76 is provided on the rod body of the rotating rod 74 extending above the limiting plate 71. A threaded block 77 is fixedly connected to the circumferential side wall of the electric telescopic rod 33. The threaded block 77 is threadedly connected to the threaded section 76 on the rotating rod 74. A transmission ring 78 is rotatably connected to the lower end of the top plate 32. A transmission rod 79 is fixedly connected between the connecting rod 73 and the inner wall of the transmission ring 78.

[0032] Specifically, when the toothed ring 72 and the connecting rod 73 drive the rotating ring 35 to rotate, it will drive the guide wheel 58 to rotate synchronously under the action of the transmission rod 79 and the transmission ring 78, so that the guide wheel 58 always corresponds to the outward expanding plate 55, thereby ensuring the coordinated use between the guide wheel 58 and the outward expanding plate 55.

[0033] Aiming at the problem of poor cleaning effect on the inner wall of the drum 12 in the prior art, the present invention sets a rotating mechanism 7. During the process of the electric telescopic rod 33 driving the mounting block 34 to perform vertical displacement, the rotating rod 74 performs vertical displacement relative to the threaded block 77. Under the action of the threaded section 76, the rotating rod 74 can rotate, thereby driving the connecting rod 73 and the rotating ring 35 to rotate synchronously through the transmission gear 75 and the toothed ring 72, so that the elastic cleaning ring 36 on the circumferential side of the rotating ring 35 can rotate during the vertical displacement process, thereby improving the scraping and cleaning effect of the elastic cleaning ring 36 on the inner wall of the drum 12.

[0034] Refer to Figures 2 to 3 , a descaling mechanism 8 is provided on the circumferential side wall of the electric telescopic rod 33, which is used to remove the dirt attached to the elastic cleaning ring 36 after each cleaning. The descaling mechanism 8 includes an air storage cylinder 81 fixedly connected to the circumferential side wall of the electric telescopic rod 33. A piston block 82 is hermetically and movably connected in the air storage cylinder 81. The rotating rod 74 extends into the air storage cylinder 81 and is fixedly connected to the piston block 82. A cleaning box 83 is provided on the circumferential side of the elastic cleaning ring 36. An air delivery pipe 84 is fixedly connected and communicated between the cleaning box 83 and the air storage cylinder 81. An air inlet pipe is fixedly connected and communicated with the upper end of the air storage cylinder 81. Check valves and automatic pressure relief valves are respectively provided in the air inlet pipe and the air delivery pipe 84. A plurality of exhaust holes are arranged in a circumferential array on the inner wall of the cleaning box 83.

[0035] Aiming at the problem that the dirt attached to the cleaning component itself is difficult to clean after cleaning the inner wall of the drum 12 in the prior art, which affects the subsequent cleaning effect, the present invention sets a descaling mechanism 8. During the lifting movement of the rotating rod 74, the piston block 82 will be driven to perform lifting movement inside the air storage cylinder 81. During the downward displacement of the rotating rod 74 and the elastic cleaning ring 36, external air is pumped into the air storage cylinder. During the upward displacement of the rotating rod 74 and the elastic cleaning ring 36, the air in the air storage cylinder 81 is compressed, and when it exceeds the critical value of the automatic pressure relief valve, the high-pressure gas is quickly discharged into the cleaning box 83 through the air delivery pipe 84. Through the plurality of exhaust holes on the inner wall of the cleaning box 83, the air impacts on the circumferential side wall of the elastic cleaning ring 36, and the elastic cleaning ring 36 is self-cleaned after each work, ensuring the cleaning effect of the elastic cleaning ring 36 on the inner wall of the drum 12 next time.

[0036] The functional principle of the present invention can be elaborated through the following operation methods: During the separation stage, after the driving motor 21 is started, the driving gear 22 rotates accordingly, meshing with the annular tooth groove 23 on the circumferential side wall of the mounting ring 11, thereby driving the mounting ring 11 and the drum 12 fixed to its upper end to rotate at high speed. At this time, the diethyl carbonate mixed liquid in the drum 12 undergoes a layering phenomenon under the action of centrifugal force. The solid impurity particles with a larger density are affected by the centrifugal force and move towards the outer peripheral wall of the drum 12; while the diethyl carbonate liquid with a smaller density accumulates in the central region of the drum 12. After the centrifugation process is completed, the drain pipe 13 is opened, and the high-purity diethyl carbonate liquid accumulated in the central region will be discharged under the action of gravity, achieving preliminary separation and purification.

[0037] During the cleaning stage, when it is necessary to clean the inner wall of the drum 12, the electric telescopic rod 33 extends, pushing the mounting block 34, the rotating ring 35 and the elastic cleaning ring 36 to move downward together. When the elastic cleaning ring 36 contacts the inner bottom wall of the drum 12, the bottom extension mechanism 4 starts to work. The inner bottom wall of the drum 12 squeezes the abutting rod 43 upward, causing the piston ring 42 to slide upward in the liquid storage cavity 41. The closed space composed of the liquid storage cavity 41, the liquid delivery pipe 46 and the annular mounting frame 44 is filled with hydraulic oil. The upward movement of the piston ring 42 causes the hydraulic oil to flow into the annular mounting frame 44 through the liquid delivery pipe 46, and the pressure of the hydraulic oil pushes the elastic cleaning ring 36 to expand and extend from the annular mounting frame 44, closely fitting the inner wall of the drum 12.

[0038] After the elastic cleaning ring 36 fits the inner wall of the drum 12, the locking and reset mechanism 5 immediately comes into play. The abutting rod 43 drives the ratchet block 54 to move upward. The ratchet block 54 cooperates with the ratchet plate 53. Under the action of the second spring 52, the ratchet plate 53 tightly clamps the ratchet block 54 to prevent it from moving downward, thereby keeping the elastic cleaning ring 36 in the state of extending and fitting the inner wall of the drum 12. At this time, the rotating mechanism 7 works. When the electric telescopic rod 33 drives the mounting block 34 to move up and down, the threaded block 77 moves accordingly. Since the threaded block 77 is threadedly connected to the threaded section 76 on the rotating rod 74, the movement of the threaded block 77 will cause the rotating rod 74 to rotate. When the rotating rod 74 rotates, it drives the toothed ring 72 to rotate through the transmission gear 75, and the toothed ring 72 drives the rotating ring 35 to rotate through the connecting rod 73, so that the elastic cleaning ring 36 rotates while moving up and down. This cleaning method combining rotation and up-and-down movement makes the scraping trajectory of the elastic cleaning ring 36 spiral, greatly increasing the cleaning coverage and improving the cleaning effect.

[0039] When the electric telescopic rod 33 contracts and drives the elastic cleaning ring 36 to move upward, the cleaning work continues. Until the elastic cleaning ring 36 rises to the initial position, the guide wheel 58 on the U-shaped rod 56 contacts the outward expansion plate 55. As the elastic cleaning ring 36 continues to rise, the guide wheel 58 rolls along the outward expansion plate 55, pushing the two outward expansion plates 55 away from each other. The outward expansion plate 55 drives the ratchet plate 53 to move to both sides against the elastic force of the second spring 52, so that the ratchet block 54 is no longer stuck. At this time, the abutting rod 43 and the ratchet block 54 move downward and reset under the action of gravity, and the elastic cleaning ring 36 contracts back into the annular mounting frame 44 under the elastic force of the first spring 45, preparing for the next cleaning.

[0040] When the rotating rod 74 moves downward along with the electric telescopic rod 33 and the rotating ring 35, the piston block 82 moves downward in the air storage cylinder 81, and the one-way valve on the air inlet pipe opens, and the outside air enters the air storage cylinder 81. When the rotating rod 74 moves upward along with the electric telescopic rod 33 and the rotating ring 35, the piston block 82 moves upward in the air storage cylinder 81, compressing the air in the air storage cylinder 81. When the pressure of the compressed air exceeds the critical value of the automatic pressure relief valve, the automatic pressure relief valve opens, and the high-pressure gas enters the cleaning box 83 through the air delivery pipe 84. The multiple exhaust holes on the inner wall of the cleaning box 83 spray the high-pressure gas evenly onto the circumferential side wall of the elastic cleaning ring 36, washing away the dirt attached to the elastic cleaning ring 36, realizing the self-cleaning of the elastic cleaning ring 36. In this way, after each time the elastic cleaning ring 36 finishes cleaning the inner wall of the drum 12, the dirt on itself can be cleaned in time, ensuring its good cleaning performance in the next cleaning and ensuring that the cleaning effect of the drum 12 is always stable.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A centrifugal device for the production of high-purity diethyl carbonate, characterized in that, Including: A workbench (1), the upper end of the workbench (1) is rotatably connected with a mounting ring (11), the upper end of the mounting ring (11) is fixedly connected with a rotating drum (12), the bottom end of the rotating drum (12) is fixedly communicated with a liquid discharge pipe (13), and the liquid discharge pipe (13) penetrates and extends below the workbench (1); A driving mechanism (2) for driving the rotating drum (12) to rotate to ensure that solid impurities can be separated from the diethyl carbonate liquid; A cleaning mechanism (3) for cleaning the inner wall of the rotating drum (12) after each work. The cleaning mechanism (3) includes two L-shaped rods (31) fixedly connected to the upper end of the workbench (1), a top plate (32) is fixedly connected between the two L-shaped rods (31), an electric telescopic rod (33) is fixedly connected to the lower end of the top plate (32), a mounting block (34) is fixedly connected to the telescopic end of the electric telescopic rod (33), a rotating ring (35) is arranged on the periphery of the mounting block (34), and an elastic cleaning ring (36) is arranged on the periphery of the rotating ring (35); A bottom extending mechanism (4) for extending the elastic cleaning ring (36) when the rotating ring (35) moves to the inner bottom wall of the rotating drum (12).

2. The centrifugal equipment for producing high-purity diethyl carbonate according to claim 1, wherein The driving mechanism (2) includes a driving motor (21) fixedly connected to the upper end of the workbench (1), a driving gear (22) is fixedly connected to the output end of the driving motor (21), and an annular tooth groove (23) meshing with the driving gear (22) is arranged on the peripheral side wall of the mounting ring (11).

3. The centrifugal equipment for producing high-purity diethyl carbonate according to claim 1, characterized in that, The elastic cleaning ring (36) is made of rubber material.

4. The centrifugal equipment for producing high-purity diethyl carbonate according to claim 3, wherein The bottom extending mechanism (4) includes a liquid storage cavity (41) opened inside the rotating ring (35), a piston ring (42) is hermetically slidably connected inside the liquid storage cavity (41), a resisting rod (43) is fixedly connected to both sides of the piston ring (42), the lower end of the resisting rod (43) passes through the piston ring (42) and the rotating ring (35) and extends below the rotating ring (35), and the resisting rod (43) is hermetically connected with the piston ring (42). An annular mounting frame (44) is fixedly connected to the peripheral side wall of the rotating ring (35), the elastic cleaning ring (36) is hermetically slidably connected with the inner wall of the annular mounting frame (44), and a plurality of first springs (45) distributed in a circumferential array are arranged between the elastic cleaning ring (36) and the inner wall of the annular mounting frame (44). A liquid infusion pipe (46) is fixedly communicated between the liquid storage cavity (41) and the inside of the annular mounting frame (44).

5. The centrifugal equipment for producing high-purity diethyl carbonate according to claim 4, characterized in that, The liquid storage cavity (41), the liquid infusion pipe (46) and the annular mounting frame (44) form a liquid storage space, and the liquid storage space is filled with hydraulic oil.

6. The centrifugal equipment for producing high-purity diethyl carbonate according to claim 4, wherein Above the rotating ring (35), there is a locking and reset mechanism (5) which is used to keep the elastic cleaning ring (36) in the extended state unchanged when the elastic cleaning ring (36) moves upward from the inner bottom wall of the drum (12), and to contract and reset the elastic cleaning ring (36) after the elastic cleaning ring (36) moves up to a specified position. The locking and reset mechanism (5) includes two support plates (51) fixedly connected to the rotating ring (35). On the side walls of the two support plates (51) close to each other, there are second springs (52). The ends of the second springs (52) far from the support plates (51) are fixedly connected with ratchet plates (53). The upper end of the abutting rod (43) extends above the rotating ring (35) and is fixedly connected with a ratchet block (54) which cooperates with the two ratchet plates (53). The upper ends of the two ratchet plates (53) are fixedly connected with outwardly expanding plates (55) which are inclined upward. Below the top plate (32), there is a U-shaped rod (56). The bottom end of the U-shaped rod (56) is fixedly connected with two symmetrically arranged hinge rods (57). Between the two hinge rods (57), there are two symmetrically arranged guide wheels (58) hinged. The two guide wheels (58) are respectively in contact with and roll on the outwardly expanding plates (55) at the corresponding positions.

7. The centrifugal equipment for producing high-purity diethyl carbonate according to claim 6, characterized in that, On the side wall of the ratchet plate (53) far from the ratchet block (54), there is a limit rod (6) fixedly connected. The limit rod (6) passes through and is slidably connected to the corresponding support plate (51).

8. The centrifugal equipment for producing high-purity diethyl carbonate according to claim 6, characterized in that, On the periphery of the mounting block (34), there is a rotating mechanism (7) which is used to drive the rotating ring (35) to rotate synchronously when the rotating ring (35) moves up and down. The rotating mechanism (7) includes two limit plates (71) fixedly connected to the peripheral side wall of the mounting block (34). Between the two limit plates (71), there is a toothed ring (72) rotatably connected. Between the toothed ring (72) and the rotating ring (35), there are two connecting rods (73) fixedly connected. At the upper end of the lower limit plate (71), there is a rotating rod (74) rotatably connected. At the position of the rotating rod (74) between the two limit plates (71), there is a transmission gear (75) fixedly connected. The transmission gear (75) meshes with the toothed ring (72). On the rod body of the rotating rod (74) extending above the limit plate (71), there is a threaded section (76). On the peripheral side wall of the electric telescopic rod (33), there is a threaded block (77) fixedly connected. The threaded block (77) is threadedly connected with the threaded section (76) on the rotating rod (74). The lower end of the top plate (32) is rotatably connected with a transmission ring (78). Between the connecting rod (73) and the inner wall of the transmission ring (78), there is a transmission rod (79) fixedly connected.

9. The centrifugal equipment for the production of high-purity diethyl carbonate according to claim 8, characterized in that, A descaling mechanism (8) is provided on the peripheral side wall of the electric telescopic rod (33) for removing the dirt attached to the elastic cleaning ring (36) after each cleaning. The descaling mechanism (8) includes an air storage cylinder (81) fixedly connected to the peripheral side wall of the electric telescopic rod (33). A piston block (82) is hermetically and movably connected in the air storage cylinder (81). The rotating rod (74) extends into the air storage cylinder (81) and is fixedly connected to the piston block (82). A cleaning box (83) is provided on the peripheral side of the elastic cleaning ring (36). An air delivery pipe (84) is fixedly connected and communicated between the cleaning box (83) and the air storage cylinder (81). An air inlet pipe is fixedly connected and communicated to the upper end of the air storage cylinder (81). One-way valves and automatic pressure relief valves are respectively provided in the air inlet pipe and the air delivery pipe (84). A plurality of exhaust holes distributed in a circumferential array are formed on the inner wall of the cleaning box (83).

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