Reaction kettle convenient to clean and use method thereof

Abstract

The invention relates to the technical field of heat exchange reaction kettles, in particular to a reaction kettle convenient to clean and a using method thereof.A kettle body rotates, a stirring shaft is static, and a centering eccentric disc slowly cuts an eccentric rotating shaft from a coaxial state to an eccentric state and approaches a kettle wall in an arc shape through the rotation difference of a friction wheel, a worm and a worm gear; the interactive pipeline is axially pushed and pulled to switch on and off, and synchronously drives the blade shell to flatten and stir or fold to scrape the wall through the connecting column, the movable sliding seat and the shifting column; the self-adaptive double cranks stretch and retract along with the eccentric distance, the kettle body is continuously rotated and conveyed to the two reverse thread conveying shafts at a constant speed, an upper-inlet lower-outlet independent channel is formed, fresh cleaning liquid goes deep from the gradually-expanded interaction groove, waste liquid is synchronously pumped back, and short-circuit-free circulating cleaning is achieved. Progressive scraping soft start is achieved, impact is small, the service life of the kettle wall and the service life of the scraper are remarkably prolonged, cleaning is efficient and water-saving, the structure is all integrated in the shaft, and switching of stirring, wall scraping and cleaning is completed without external power.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchange reaction kettle, in particular to a reaction kettle convenient to clean and a use method thereof. BACKGROUND

[0002] The existing heat exchange reaction kettle is used for processing raw materials with high viscosity and high solid content, and in order to ensure uniform heat transfer, the material is continuously rolled and contacted with the heating surface. Generally, the whole kettle body of such a reaction kettle rotates around the axis, and the stirring shaft is fixed and does not move, relying on the rotation of the kettle body to drive the internal material to roll, mix and transfer heat to realize the reaction.

[0003] However, such a reaction kettle only relies on the rotation of the kettle wall to drive the material to slide, and the wall layer flow rate is low and the temperature gradient is large. The inner wall repeatedly withstands high-temperature cooling alternating stress, and the fatigue strength drops sharply. At the same time, the fixed stirring shaft cannot extend the scraper, and the kettle body rotation can only "throw" the material to the wall but cannot scrape it down. The thermal resistance of the sticky layer increases exponentially, and the heat transfer is further deteriorated, forming a vicious cycle of "stickier and colder, colder and stickier". Finally, each batch needs to be manually flushed and hammered to clean, which not only damages the inner wall but also breaks the continuous production.

[0004] In view of this, we propose a reaction kettle convenient to clean and a use method thereof. SUMMARY

[0005] The present application aims to provide a reaction kettle convenient to clean and a use method thereof, to solve the problem of low fatigue strength of the inner wall and difficult cleaning of the surface material in the heat exchange reaction kettle as described in the background art. To achieve the above purpose, the present application provides the following technical scheme: a reaction kettle convenient to clean and a use method thereof, comprising a reaction kettle shell and a reaction kettle rotating seat, one end of the reaction kettle shell is connected with a reaction kettle end cover, the inner surface of the reaction kettle end cover is provided with a centering eccentric disc, the inner surface of the centering eccentric disc is provided with an eccentric rotating shaft, one end of the eccentric rotating shaft is provided with a stirring installation shaft, one end of the stirring installation shaft is provided with an adaptive double crank, the outer surface of the stirring installation shaft is provided with a scraping stirring blade.

[0006] Preferably, the centering eccentric disc comprises a coaxial rotating disc, the coaxial rotating disc is rotationally connected with the inner side surface of the end cover of the reaction kettle, the outer side surface of the coaxial rotating disc is provided with symmetrically distributed return grooves, the outer side surface of the coaxial rotating disc is fixedly connected with a fixed shell, the inner side surface of the fixed shell is slidingly connected with a friction wheel, the outer side surface of the friction wheel is rotationally connected with a centering clamp jaw, the outer side surface of the friction wheel is sleeved with a transmission belt, the inner side surface of the fixed shell is rotationally connected with a driven rotating shaft, one end of the driven rotating shaft is fixedly connected with a driving worm, the inner side surface of the coaxial rotating disc is rotationally connected with an eccentric rotating disc, and the outer side surface of the eccentric rotating disc is provided with a worm groove.

[0007] Preferably, the friction wheel is in contact with the inner side surface of the end cover of the reaction kettle, the number of the friction wheels is two and they are symmetrically distributed, the centering clamp jaw is slidingly connected with the inner side surface of the fixed shell, the two ends of the transmission belt are respectively sleeved with the outer side surfaces of the driven rotating shaft and the friction wheel, the eccentric rotating disc passes the center of the coaxial rotating disc, and the worm groove is engaged with the driving worm.

[0008] Preferably, the eccentric rotating shaft comprises a fixed sleeve, the fixed sleeve is fixedly connected with the inner side surface of the eccentric rotating disc, the outer side surface of the fixed sleeve is provided with a locking groove, the inner side surface of the locking groove is slidingly connected with a limiting clamping block, the inner side surface of the locking groove is fixedly connected with a clamping block spring, the inner side surface of the fixed sleeve is slidingly connected with a rotating sleeve, the outer side surface of the rotating sleeve is fixedly connected with symmetrically distributed handles, the outer side surface of the rotating sleeve is fixedly connected with a locking clamping block, one end of the rotating sleeve is rotationally connected with a pipeline mounting cylinder, the inner side surface of the pipeline mounting cylinder is fixedly connected with an interactive pipeline, and one end of the interactive pipeline is fixedly connected with a connecting column.

[0009] Preferably, the locking groove is slidingly connected with the limiting clamping block and the locking clamping block, the clamping block spring is in contact with the limiting clamping block, the pipeline mounting cylinder and the rotating sleeve are both slidingly connected with the inner side surface of the fixed sleeve, the number of the interactive pipelines in the pipeline mounting cylinder is two and they are distributed above and below, and the interactive pipelines are slidingly connected with the inner side surface of the fixed sleeve.

[0010] Preferably, the stirring mounting shaft comprises a rotating shaft shell, one end of the rotating shaft shell is fixedly connected with the fixed sleeve, the outer side surface of the rotating shaft shell is provided with an interactive groove, the inner side surface of the rotating shaft shell is fixedly connected with an inner partition plate, the inner side surface of the rotating shaft shell is rotationally connected with symmetrically distributed threaded conveying shafts, the inner side surface of the rotating shaft shell is fixedly connected with a reverse gear box, the inner side surface of the reverse gear box is rotationally connected with symmetrically distributed meshing gears, and one end of the meshing gear is fixedly connected with a sealing baffle.

[0011] Preferably, the interaction slot is equidistantly distributed and the size gradually increases from outside to inside, the meshing gear is mutually engaged, the sealing baffle is rotationally connected with the reverse gear box and is dynamic sealing, and the sealing baffle is fixedly connected with the threaded conveying shaft.

[0012] Preferably, the adaptive double crank includes a driven rotary disc, the driven rotary disc is fixedly connected with the threaded conveying shaft above, the outer surface of the driven rotary disc is rotationally connected with an inner connecting rod, one end of the rotary shaft shell is fixedly connected with an outer fixed disc, the inner surface of the reaction kettle shell is fixedly connected with a driving rotary disc, and the outer surface of the driving rotary disc is rotationally connected with an outer connecting rod.

[0013] Preferably, the driven rotary disc is rotationally connected with the inner surface of the outer fixed disc, and the inner connecting rod is slidingly connected with the outer connecting rod.

[0014] Preferably, the scraping stirring blade includes a blade rotary shaft, the blade rotary shaft is fixedly connected with the outer surface of the rotary shaft shell, the outer surface of the blade rotary shaft is rotationally connected with a blade shell, the outer surface of the blade shell is provided with a connecting groove, the outer surface of the blade shell is fixedly connected with a stirring blade, one end of the stirring blade is fixedly connected with a scraping layer, and the two sides of the rotary shaft shell are slidingly connected with equidistantly distributed movable sliding seats, the outer surface of the movable sliding seat is slidingly connected with symmetrically distributed poking columns.

[0015] Preferably, the number of the blade rotary shafts on each side of the rotary shaft shell is six, and the blade rotary shafts are symmetrically and equidistantly distributed on the outer surface of the rotary shaft shell, the number of the blade shells is six, and the blade shells are symmetrically and equidistantly distributed on the outer surface of the rotary shaft shell, the poking column is slidingly connected with the inner surface of the connecting groove, and the connecting column and the movable sliding seat are fixedly connected.

[0016] A use method of the reaction kettle convenient to clean, including the following steps:

[0017] S1, the reaction kettle shell is driven to rotate by the reaction kettle rotary seat, the reaction kettle end cover remains relatively stationary with the reaction kettle shell, the coaxial rotary disc in the centering eccentric disc is not rotated due to small friction with the end cover, the eccentric rotary disc is locked in the "centering" position by the driving worm, the eccentric rotary shaft is coaxial with the kettle body, the blade shell of the scraping stirring blade is unfolded outward into a stirring blade state under the action of the movable sliding seat and the connecting column, the friction wheel is kept away from the inner side of the reaction kettle end cover (the centering clamp jaw pushes it into the back-off groove), the interaction pipeline is retracted into the fixed sleeve, the internal and external channels are cut off, the rotation of the reaction kettle shell kettle body brings about material tumbling, the unfolded horizontal stirring blade mixes and heats the material softly, and the reaction stage is completed;

[0018] S2, after the reaction, the material is emptied, the kettle body continues to rotate at low speed, the system still maintains the "centering" state, the eccentric rotating disc does not rotate, the eccentric rotating shaft is still coaxial with the kettle body, the scraping stirring blade maintains the expanded state, the blade does not contact the inner wall, and additional resistance is avoided during the emptying process;

[0019] S3, the centering clamping jaw is pushed to the two sides, the friction wheel is pressed against the end cover of the reaction kettle again, rotates with the end cover (i.e. the kettle body), and drives the eccentric rotating disc to rotate slowly through a great speed reduction ratio through the transmission belt, the driven rotating shaft, the driving worm and the worm gear groove; the eccentric rotating disc drives the eccentric rotating shaft, the stirring mounting shaft and the scraping stirring blade to gradually approach the inner wall of the reaction kettle shell along an arc-shaped path, the blade shell is inwardly folded through the linkage of the connecting column, the movable slide and the pushing column, the scraping layer is converted from horizontal to vertical, and in the approaching process, the scraping layer first loosens the material at a small angle and low radial pressure, then gradually increases the cutting depth and radial pressure, realizes the "soft start" type gradual scraping of the wall, and the continuous rotation of the kettle body ensures the scraping of the whole wall;

[0020] S4, while scraping, the handle is manually pushed and turned to make the locking block slide to the middle of the locking groove and then be pushed outwards, the rotating sleeve and the pipeline mounting cylinder are synchronously extended outwards, the interactive pipeline is extended out of the fixed sleeve, the connecting column is moved outwards, the blade shell is completely folded through the movable slide and the pushing column, the scraping layer is tightly attached to the inner wall to form a sealing scraper, the rotation of the kettle body is synchronously transmitted to the upper threaded conveying shaft through the double crank, the upper shaft drives the lower shaft to rotate in the opposite direction at the same speed through the meshing gears in the reversing gear box, independent upper and lower channels are formed, fresh cleaning liquid is uniformly infiltrated into the kettle body through the upper interactive pipeline, the upper threaded conveying shaft and the interactive groove with gradually increasing size, and the used liquid containing impurities is synchronously drawn back through the lower threaded conveying shaft, is discharged through the lower interactive pipeline, closed-loop circulation cleaning is realized, after cleaning, the handle is reversely operated to make the interactive pipeline retract, the blade shell is unfolded again, the friction wheel is pushed away from the end cover by the centering clamping jaw again, the eccentric rotating disc is locked to the "centering" position, the device returns to the initial stirring state, and waits for the next batch.

[0021] Compared with the prior art, the beneficial effects of the present application are:

[0022] In the present application, through the cooperation of the centering eccentric disc, the friction wheel and the worm gear, the switching of "coaxial stirring - eccentric scraping of the wall" is realized, the scraping path is gradually arc-shaped and soft start, rigid impact is avoided, and the life of the scraper and the kettle wall is prolonged.

[0023] In the present application, through the cooperation of the interactive pipeline, the upper and lower threaded conveying shafts and the reversing gear box, the effect of independent circulation of the cleaning liquid "in from the top and out from the bottom" is realized, the fresh liquid is continuously deepened, the waste liquid is synchronously discharged, there is no mixing short circuit, and the cleaning is efficient and thorough.

[0024] All switching, transmission, circulation functions are integrated in the stirring shaft in the application, without external guide rail, air cylinder or motor, the whole machine structure is simple and compact, the installation space and maintenance amount are greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a whole structure side view schematic diagram of the application;

[0026] Figure 2 It is an internal structure side view schematic diagram of the application;

[0027] Figure 3 It is a whole structure right view of the application;

[0028] Figure 4 It is a centering eccentric disc internal structure mutual cooperation structure schematic diagram of the application;

[0029] Figure 5 It is a scraping stirring blade retracted schematic diagram of the application;

[0030] Figure 6 It is a scraping stirring blade unfolded schematic diagram of the application;

[0031] Figure 7 It is a scraping stirring blade and stirring installation shaft front view of the application;

[0032] Figure 8 It is a fixed sleeve and interactive pipeline mutual cooperation structure schematic diagram A of the application;

[0033] Figure 9 It is a fixed sleeve and interactive pipeline mutual cooperation structure schematic diagram B of the application;

[0034] Figure 10 It is a locking groove, limiting block, block spring, locking block mutual cooperation structure schematic diagram of the application;

[0035] Figure 11 It is a stirring installation shaft component mutual cooperation structure schematic diagram of the application;

[0036] Figure 12 It is a reverse gear box and threaded conveying shaft mutual cooperation structure schematic diagram of the application;

[0037] Figure 13 It is a double-crank component mutual cooperation structure schematic diagram of the application;

[0038] Figure 14 It is an internal connecting rod and external connecting rod mutual cooperation structure schematic diagram of the application;

[0039] Figure 15 It is a scraping stirring blade component mutual cooperation structure schematic diagram of the application;

[0040] Figure 16 For the connecting groove, movable sliding seat, and the cooperation structure of the pushing column of the application, a schematic diagram is shown in the figure.

[0041] Figure 17 For the connecting groove, movable sliding seat, and the cooperation structure of the pushing column of the application, a schematic diagram is shown in the figure. Figure 2 The enlarged view of A in the figure.

[0042] Figure 18 For the connecting groove, movable sliding seat, and the cooperation structure of the pushing column of the application, a schematic diagram is shown in the figure. Figure 6 The enlarged view of B in the figure.

[0043] In the figure: 1, reaction kettle shell; 11, reaction kettle end cover; 12, reaction kettle rotating seat; 2, centering eccentric disc; 21, coaxial rotating disc; 211, back-off groove; 22, fixed shell; 221, friction wheel; 222, centering clamp jaw; 223, transmission belt; 224, driven rotating shaft; 225, driving worm; 23, eccentric rotating disc; 231, worm gear groove; 3, eccentric rotating shaft; 31, fixed sleeve; 311, locking groove; 312, limiting clamp block; 313, clamp block spring; 32, rotating sleeve; 321, handle; 322, locking clamp block; 33, pipeline mounting cylinder; 331, interactive pipeline; 332, connecting column; 4, stirring mounting shaft; 41, rotating shaft shell; 411, interactive groove; 42, inner baffle; 43, threaded conveying shaft; 44, reversing gear box; 441, meshing gear; 442, sealing baffle; 5, adaptive double crank; 51, driven rotating disc; 511, inner connecting rod; 52, outer fixed disc; 53, driving rotating disc; 531, outer connecting rod; 6, scraping stirring blade; 61, blade rotating shaft; 62, blade shell; 621, connecting groove; 622, stirring blade; 623, scraping layer; 63, movable sliding seat; 631, pushing column. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0045] Please refer to Figures 1 to 18 The application provides a technical solution: a reaction kettle convenient to clean, which comprises a reaction kettle shell 1 and a reaction kettle rotating seat 12, one end of the reaction kettle shell 1 is clamped and connected with a reaction kettle end cover 11, the inner side surface of the reaction kettle end cover 11 is provided with a centering eccentric disc 2, the inner side surface of the centering eccentric disc 2 is provided with an eccentric rotating shaft 3, one end of the eccentric rotating shaft 3 is provided with a stirring mounting shaft 4, one end of the stirring mounting shaft 4 is provided with an adaptive double crank 5, and the outer side surface of the stirring mounting shaft 4 is provided with a scraping stirring blade 6.

[0046] The centering eccentric disc 2 comprises a coaxial rotating disc 21, which is rotationally connected to the inner side surface of the reactor end cover 11. The outer side surface of the coaxial rotating disc 21 is provided with symmetrically distributed back-off grooves 211. The outer side surface of the coaxial rotating disc 21 is fixedly connected with a fixed shell 22. The inner side surface of the fixed shell 22 is slidingly connected with a friction wheel 221. The outer side surface of the friction wheel 221 is rotationally connected with a centering clamp jaw 222. The outer side surface of the friction wheel 221 is sleeved with a transmission belt 223. The inner side surface of the fixed shell 22 is rotationally connected with a driven rotating shaft 224. One end of the driven rotating shaft 224 is fixedly connected with a driving worm 225. The inner side surface of the coaxial rotating disc 21 is rotationally connected with an eccentric rotating disc 23. The outer side surface of the eccentric rotating disc 23 is provided with worm grooves 231.

[0047] The friction wheel 221 is in contact with the inner side surface of the reactor end cover 11. The number of the friction wheels 221 is two and they are symmetrically distributed. The centering clamp jaw 222 is slidingly connected with the inner side surface of the fixed shell 22. The two ends of the transmission belt 223 are respectively sleeved on the outer side surfaces of the driven rotating shaft 224 and the friction wheel 221. The center of the eccentric rotating disc 23 does not coincide with the center of the coaxial rotating disc 21, but the edge covers the center. The worm grooves 231 are engaged with the driving worm 225.

[0048] Through the arrangement of the centering eccentric disc 2, the eccentric rotating shaft 3 can be rotated to a position coaxial with the reactor shell 1 for stirring, or slowly approach the position of the inner wall of the reactor shell 1 for scraping. In the process of use, the coaxial rotating disc 21 is used to install the fixed shell 22 and the eccentric rotating disc 23. Since the coaxial rotating disc 21 is rotationally connected with the reactor end cover 11, when the reactor shell 1 and the reactor end cover 11 rotate, the friction between the coaxial rotating disc 21 and the reactor end cover 11 is small, and the coaxial rotating disc 21 can not rotate with the reactor end cover 11. Therefore, the eccentric rotating shaft 3 and the scraping stirring blade 6 will not rotate with the reactor end cover 11. The raw materials on the inner wall of the reactor shell 1 will be turned over with the rotation of the reactor shell 1.

[0049] Since the eccentric rotating disc 23 passes through the center but is not coaxial with the fixed shell 22, the eccentric rotating shaft 3 is installed at the edge of the eccentric rotating disc 23. When the eccentric rotating shaft 3 is rotated to the central coaxial position, the scraping stirring blade 6 does not rotate at this time. The internal materials are rolled, mixed and heat transferred by relying on the rotation of the reactor body, and the reaction is realized by contacting with the stirring blade.

[0050] After the internal materials in the reactor shell 1 are discharged after the reaction is completed, the reactor shell 1 continues to rotate for cleaning. At this time, the reactor end cover 11 will be in contact with the friction wheel 221. The friction wheel 221 is rotated by friction, and the rotation is transmitted to the driving worm 225 through the transmission belt 223. The driving worm 225 drives the eccentric rotating disc 23 to rotate through the worm grooves 231. Since the eccentric rotating shaft 3 is at the edge of the eccentric rotating disc 23, it can rotate with the eccentric rotating disc 23 to approach the inner wall of the reactor shell 1.

[0051] The rotation of the kettle body of the reactor shell 1 is transmitted to the eccentric turntable 23 through the worm and the worm gear, and has a very large transmission ratio, so that the eccentric turntable 23 rotates at a speed much smaller than that of the reactor shell 1, and the eccentric rotating shaft 3 slowly approaches the inner wall of the reactor shell 1;

[0052] And since the eccentric rotating shaft 3 rotates around the eccentric turntable 23 to approach the inner wall of the reactor shell 1, it gradually approaches in an arc path compared to direct extension contact, and the scraping stirring blade 6 used for scraping gradually changes from horizontal to vertical during rotation, so that during scraping of the inner wall of the reactor shell 1, it is a gradual pressure application, starting with a small angle and almost zero radial pressure contact, and with rotation, the cutting depth and radial pressure gradually increase, which is equivalent to a "soft start" process, which disperses the impact force into a continuous action, greatly reducing the instantaneous load on the scraper, the reactor wall and the transmission system;

[0053] In the initial stage, the scraper angle is gentle, the tangential force dominates, and mainly plays a role in peeling and guiding the material, at this time the radial force is very small, so the overall resistance is small, with the scraper standing up, the radial force gradually increases, but at this time the material has been preliminarily loosened, so although the radial force increases, the total resistance does not form a destructive peak, and the material can be loosened, peeled, guided first, which is more suitable for stubborn, adhered to the wall of the material layer, and the peeling effect is cleaner and more thorough;

[0054] The two centering clamps 222 can push the friction wheel 221 to slide on the back-off groove 211 and push it inward, so that it is no longer in contact with the reactor end cover 11, at this time the eccentric turntable 23 does not rotate;

[0055] The coaxial turntable 21 and the end cover 11 are dynamically sealed, and the surface roughness Ra is 0.4 μm, the dynamic friction coefficient is ≤0.07 (PTFE coating), the friction wheel 221 is covered with polyurethane 85 Shore A, the pressing force is 120±10N, the slip torque is ≤0.8N·m, the modulus of the driving worm 225 and the worm gear groove 231 is 1mm, the number of heads z1=1, the number of worm gear teeth z2=55, and the transmission ratio i=55.

[0056] The eccentric rotating shaft 3 includes a fixed sleeve 31, which is fixedly connected to the inner surface of the eccentric turntable 23. A locking groove 311 is provided on the outer surface of the fixed sleeve 31. A limit block 312 is slidably connected to the inner surface of the locking groove 311. A block spring 313 is fixedly connected to the inner surface of the locking groove 311. A rotating sleeve 32 is slidably connected to the inner surface of the fixed sleeve 31. A symmetrically distributed handle 321 is fixedly connected to the outer surface of the rotating sleeve 32. A locking block 322 is fixedly connected to the outer surface of the rotating sleeve 32. A pipe mounting cylinder 33 is rotatably connected to one end of the rotating sleeve 32. An interactive pipe 331 is fixedly connected to the inner surface of the pipe mounting cylinder 33. A connecting post 332 is fixedly connected to one end of the interactive pipe 331.

[0057] The locking groove 311 is slidably connected to the limiting block 312 and the locking block 322. The block spring 313 is in contact with the limiting block 312. The pipe mounting cylinder 33 and the rotating sleeve 32 are slidably connected to the inner surface of the fixed sleeve 31. There are two interactive pipes 331 in the pipe mounting cylinder 33, which are distributed vertically. The interactive pipes 331 are slidably connected to the inner surface of the fixed sleeve 31.

[0058] By setting the eccentric rotating shaft 3, the opening and closing of the pipeline and the switching of the stirring and scraping modes of the scraping and stirring blades 6 can be controlled by pushing and pulling in the axial direction. During use, the fixing sleeve 31 is fixed inside the eccentric rotating disk 23, so that it rotates with the eccentric rotating disk 23 and approaches the inner wall of the reactor shell 1.

[0059] Both the rotating sleeve 32 and the pipe mounting sleeve 33 slide inside the fixed sleeve 31, but only the rotating sleeve 32 rotates, and it is rotatably connected to the pipe mounting sleeve 33. When the rotating sleeve 32 rotates, the pipe mounting sleeve 33 does not rotate.

[0060] The rotating sleeve 32 is manually controlled to push, pull, and rotate via the handle 321. Since the locking block 322 on the rotating sleeve 32 is located in the locking groove 311, the range of motion of the rotating sleeve 32 on the fixed sleeve 31 is limited. The locking groove 311 is "I" shaped. When the locking block 322 is in the grooves on both ends, it cannot move longitudinally. It is necessary to first rotate the locking block 322 to the middle position and then push and pull it to enter the groove on the other end, lock and maintain the position of the rotating sleeve 32 on the fixed sleeve 31. In addition, the locking groove 311 is provided with a limiting block 312 pushed out by the block spring 313 to block the locking block 322, which will block the locking block 322 in the grooves on both ends. Therefore, the rotating sleeve 32 will not move axially without external force.

[0061] The pipe mounting cylinder 33 enables the interaction between the inside and outside of the reactor shell 1 during cleaning via the internal interactive pipe 331. When the pipe mounting cylinder 33 drives the interactive pipe 331 to move longitudinally on the fixed sleeve 31, the interactive pipe 331 can extend to the outside of the fixed sleeve 31 or be contained inside the fixed sleeve 31. When it is inside, the outer wall of the interactive pipe 331 blocks the fixed sleeve 31, thereby cutting off the connection between the interactive pipe 331 and the inside of the reactor shell 1.

[0062] While the interactive pipe 331 moves axially, it will drive the connecting column 332 to move axially, thereby controlling the switching of the scraping stirring blade 6. When the connection is cut off, it does not interact with the outside world. At this time, the reactor is used for stirring, and the scraping stirring blade 6 is in the stirring state. In the cleaning state, the scraping stirring blade 6 is in the scraping state.

[0063] The locking groove 311 is "I" shaped, with a groove width of 8mm, a depth of 4mm, and a transition radius of R1.5; the locking spring 313 is a 1×5×20mm stainless steel compression spring with a preload of 18±2N.

[0064] The stirring mounting shaft 4 includes a rotating shaft housing 41, which is fixedly connected to one end of the fixed sleeve 31. An interactive groove 411 is provided on the outer surface of the rotating shaft housing 41. An inner partition 42 is fixedly connected to the inner surface of the rotating shaft housing 41. A symmetrically distributed threaded conveying shaft 43 is rotatably connected to the inner surface of the rotating shaft housing 41. A reverse gear box 44 is fixedly connected to the inner surface of the rotating shaft housing 41. A symmetrically distributed meshing gear 441 is rotatably connected to the inner surface of the reverse gear box 44. A sealing baffle 442 is fixedly connected to one end of the meshing gear 441.

[0065] Interactive grooves 411 are evenly distributed and their size gradually increases from the outside to the inside. Meshing gears 441 mesh with each other. Sealing baffle 442 is rotatably connected to reversing gear box 44 and dynamically sealed. Sealing baffle 442 is fixedly connected to threaded conveying shaft 43.

[0066] By setting the stirring shaft 4, the upper and lower threaded conveyor shafts 43 respectively input the cleaning liquid into the interior and discharge the used cleaning liquid. The input and output are independent of each other and will not cause blockage, thus realizing circulation. During use, when the interactive pipe 331 is extended, it can interact with the interior of the reactor, inputting the cleaning liquid into the reactor from the upper interactive pipe 331. The upper threaded conveyor shaft 43 rotates to gradually push the cleaning liquid into the rotating shaft housing 41. The rotating shaft housing 41 has an interactive groove 411 with the size gradually increasing from the outside to the inside. The cleaning liquid will seep out from the interactive groove 411 into the interior of the reactor. Due to the gradual increase in size, less seepage occurs when the cleaning liquid enters a shallow position, and more seepage occurs as it goes further in, thus sending the cleaning liquid out of the depth of the reactor.

[0067] The upper threaded conveying shaft 43 rotates, and the lower threaded conveying shaft 43 is driven to rotate synchronously through the meshing gear 441 in the reversing gear box 44. Since the meshing gear 441 has the same rotation speed but opposite rotation direction, the lower threaded conveying shaft 43 is used to output the used cleaning liquid mixed with impurities.

[0068] The threaded conveying shaft 43 for input is located at the upper side, the threaded conveying shaft 43 for output is located at the lower side, and the output channels are independent of each other. When the internal cleaning liquid is output from the lower side, it will not contact the new cleaning liquid input from the upper threaded conveying shaft 43, so that the new cleaning liquid can enter the reactor and only the used cleaning liquid mixed with impurities can be discharged.

[0069] The double crank 5 is adapted to include a driven rotating disc 51, the driven rotating disc 51 is fixedly connected with the upper threaded conveying shaft 43, the outer surface of the driven rotating disc 51 is rotatably connected with an inner connecting rod 511, one end of the rotating shaft housing 41 is fixedly connected with an outer fixed disc 52, the inner surface of the reactor housing 1 is fixedly connected with a driving rotating disc 53, and the outer surface of the driving rotating disc 53 is rotatably connected with an outer connecting rod 531.

[0070] The driven rotating disc 51 is rotatably connected with the inner surface of the outer fixed disc 52, and the inner connecting rod 511 is slidably connected with the outer connecting rod 531.

[0071] The threaded conveying shaft 43 is a trapezoidal thread with a length of 300 mm, a pitch of 4 mm, a rotation speed of 150 rpm, and a displacement of 0.18 L rev -1 The alternating groove 411 has 16 gradually expanding grooves with an inlet width of 2 mm, an outlet width of 6 mm, a length of 40 mm, and an opening rate of 12% to 28%, which ensures that the uniformity of flow along the path is greater than or equal to 90%.

[0072] Through the setting of the double crank 5, the rotation of the reactor housing 1 can be transmitted to the threaded conveying shaft 43 at any position. During use, when the reactor housing 1 rotates, the driving rotating disc 53 fixedly connected to the inner wall will rotate synchronously. The driving rotating disc 53 is connected to the driven rotating disc 51 through the outer connecting rod 531 and the inner connecting rod 511, forming a parallel double crank structure. The rotation of the driving rotating disc 53 is transmitted to the driven rotating disc 51, and the rotation direction and rotation speed are the same. The threaded conveying shaft 43 can obtain a higher rotation speed for input and output of cleaning liquid, which is different from the low rotation speed of the eccentric rotating disc 23.

[0073] The inner connecting rod 511 and the outer connecting rod 531 are slidably connected and embedded in each other, which can adapt to different distances between the driving rotating disc 53 and the driven rotating disc 51, so as to adapt to different distances of the eccentric rotating shaft 3 approaching the inner wall of the reactor in an arc path after the eccentric rotating disc 23 rotates.

[0074] The scraping stirring blade 6 comprises a blade rotating shaft 61 fixedly connected with the outer surface of the rotating shaft shell 41, an outer surface of the blade rotating shaft 61 is rotationally connected with a blade shell 62, an outer surface of the blade shell 62 is provided with a connecting groove 621, and an outer surface of the blade shell 62 is fixedly connected with a stirring blade 622, one end of the stirring blade 622 is fixedly connected with a scraping layer 623, and both sides of the rotating shaft shell 41 are slidably connected with equidistantly distributed movable sliding seats 63, and an outer surface of the movable sliding seat 63 is slidably connected with symmetrically distributed poking columns 631.

[0075] The number of the blade rotating shaft 61 on each side of the rotating shaft shell 41 is six, and the blade rotating shaft 61 is symmetrically and equidistantly distributed on the outer surface of the rotating shaft shell 41, the number of the blade shell 62 is six, and the blade shell 62 is symmetrically and equidistantly distributed on the outer surface of the rotating shaft shell 41, the poking column 631 is slidably connected with the inner surface of the connecting groove 621, and the connecting column 332 and the movable sliding seat 63 are fixedly connected.

[0076] Through the arrangement of the scraping stirring blade 6, in the use process, the blade shell 62 can rotate outside the rotating shaft shell 41 through the blade rotating shaft 61, according to different rotating angles, the blade shell 62 is expanded outward for use of the stirring blade, or the blade shell 62 is retracted inward to make the scraping layer 623 close to the inner wall of the reaction kettle shell 1, the surface of the scraping layer 623 is covered with high manganese steel with high hardness, and the scraping effect is realized;

[0077] The blade shell 62 is connected with the poking column 631 on the movable sliding seat 63 through the connecting groove 621, when the movable sliding seat 63 moves, the blade shell 62 is switched by poking the connecting groove 621 through the poking column 631;

[0078] The poking column 631 can slide transversely on the movable sliding seat 63, so that the different positions of the connecting groove 621 after the rotation of the blade shell 62 are adapted;

[0079] The movable sliding seat 63 is fixed with the connecting column 332, so that the state of the scraping stirring blade 6 is switched when the interactive pipeline 331 is axially moved to switch the connection state, the switching of the scraping stirring blade 6 and the reaction kettle stirring and cleaning two states are bound, the stirring blade is not interacted with the outside in the stirring process, the stirring blade is expanded in the stirring state, the stirring blade is retracted and the cleaning liquid is input in the cleaning process, and the scraping is retracted;

[0080] The scraping layer 623 is high manganese steel Mn13Cr2, the thickness is 4mm, the hardness HB is 200, the tensile strength is greater than or equal to 500 after cold hardening, the tensile strength is greater than or equal to 800MPa, and the impact toughness is 120J cm 2 .

[0081] In the embodiment, as Figure 1 , Figure 2As shown, each component is installed inside the reactor shell 1, and the reactor shell 1 rotates around the circumference by the rotation of the reactor rotating seat 12;

[0082] As shown in the embodiment, the center eccentric disc 2 is installed on the reactor end cover 11, the coaxial rotating disc 21 is coaxial with the reactor end cover 11, and the fixed shell 22 is internally connected to drive the worm and worm gear part of the eccentric rotating disc 23 to rotate; Figure 3 、 Figure 4 As shown in the embodiment, the center eccentric disc 2 is installed on the reactor end cover 11, the coaxial rotating disc 21 is coaxial with the reactor end cover 11, and the fixed shell 22 is internally connected to drive the worm and worm gear part of the eccentric rotating disc 23 to rotate;

[0083] As shown in the embodiment, the center eccentric disc 2 is installed on the reactor end cover 11, the coaxial rotating disc 21 is coaxial with the reactor end cover 11, and the fixed shell 22 is internally connected to drive the worm and worm gear part of the eccentric rotating disc 23 to rotate; Figure 5 、 Figure 6 、 Figure 7 As shown in the embodiment, the center eccentric disc 2 is installed on the reactor end cover 11, the coaxial rotating disc 21 is coaxial with the reactor end cover 11, and the fixed shell 22 is internally connected to drive the worm and worm gear part of the eccentric rotating disc 23 to rotate;

[0084] As shown in the embodiment, the center eccentric disc 2 is installed on the reactor end cover 11, the coaxial rotating disc 21 is coaxial with the reactor end cover 11, and the fixed shell 22 is internally connected to drive the worm and worm gear part of the eccentric rotating disc 23 to rotate; Figure 8 、 Figure 9 As shown in the embodiment, the center eccentric disc 2 is installed on the reactor end cover 11, the coaxial rotating disc 21 is coaxial with the reactor end cover 11, and the fixed shell 22 is internally connected to drive the worm and worm gear part of the eccentric rotating disc 23 to rotate;

[0085] As shown in the embodiment, the center eccentric disc 2 is installed on the reactor end cover 11, the coaxial rotating disc 21 is coaxial with the reactor end cover 11, and the fixed shell 22 is internally connected to drive the worm and worm gear part of the eccentric rotating disc 23 to rotate; Figure 8 、 Figure 10 As shown in the embodiment, the center eccentric disc 2 is installed on the reactor end cover 11, the coaxial rotating disc 21 is coaxial with the reactor end cover 11, and the fixed shell 22 is internally connected to drive the worm and worm gear part of the eccentric rotating disc 23 to rotate;

[0086] As shown in the embodiment, the center eccentric disc 2 is installed on the reactor end cover 11, the coaxial rotating disc 21 is coaxial with the reactor end cover 11, and the fixed shell 22 is internally connected to drive the worm and worm gear part of the eccentric rotating disc 23 to rotate; Figure 11 、 Figure 12 As shown in the embodiment, the center eccentric disc 2 is installed on the reactor end cover 11, the coaxial rotating disc 21 is coaxial with the reactor end cover 11, and the fixed shell 22 is internally connected to drive the worm and worm gear part of the eccentric rotating disc 23 to rotate;

[0087] As shown in the embodiment, the center eccentric disc 2 is installed on the reactor end cover 11, the coaxial rotating disc 21 is coaxial with the reactor end cover 11, and the fixed shell 22 is internally connected to drive the worm and worm gear part of the eccentric rotating disc 23 to rotate; Figure 13 、 Figure 14 As shown in the embodiment, the center eccentric disc 2 is installed on the reactor end cover 11, the coaxial rotating disc 21 is coaxial with the reactor end cover 11, and the fixed shell 22 is internally connected to drive the worm and worm gear part of the eccentric rotating disc 23 to rotate;

[0088] As shown in the embodiment, the center eccentric disc 2 is installed on the reactor end cover 11, the coaxial rotating disc 21 is coaxial with the reactor end cover 11, and the fixed shell 22 is internally connected to drive the worm and worm gear part of the eccentric rotating disc 23 to rotate; Figure 15 、 Figure 16 As shown in the embodiment, the center eccentric disc 2 is installed on the reactor end cover 11, the coaxial rotating disc 21 is coaxial with the reactor end cover 11, and the fixed shell 22 is internally connected to drive the worm and worm gear part of the eccentric rotating disc 23 to rotate;

[0089] As shown in the embodiment, the center eccentric disc 2 is installed on the reactor end cover 11, the coaxial rotating disc 21 is coaxial with the reactor end cover 11, and the fixed shell 22 is internally connected to drive the worm and worm gear part of the eccentric rotating disc 23 to rotate; Figure 17 、 Figure 18As shown, the connecting column 332 drives the movable slide block 63 to slide laterally, causing the blade shell 62 to unfold or retract.

[0090] The invention provides the following usage method and advantages: The reaction vessel is easy to clean, and its usage method is as follows:

[0091] like Figures 1 to 18 As shown, during use, the reactor shell 1 is driven to rotate by the reactor rotating seat 12. The reactor end cover 11 rotates synchronously with the reactor shell 1, and the two remain relatively stationary. The coaxial turntable 21 in the centering eccentric disk 2 does not rotate due to minimal friction with the reactor end cover 11. The eccentric turntable 23 is locked in the "centering" position by the active worm gear 225. The eccentric rotating shaft 3 is coaxial with the reactor body. The blade shell 62 of the scraping stirring blade 6 unfolds outward into a stirring blade state under the action of the movable slide 63 and the connecting column 332. The friction wheel 221 remains detached from the inner side of the reactor end cover 11 (the centering claw 222 pushes it into the return groove 211). The interactive pipe 331 retracts into the fixed sleeve 31, cutting off the inner and outer channels. The reactor shell 1 rotates, causing the material to tumble. The unfolded horizontal stirring blade 622 gently mixes and transfers heat to the material, completing the reaction stage.

[0092] After the reaction is complete, the material is discharged, the vessel continues to rotate at a low speed, the system remains in the "centering" state, the eccentric turntable 23 does not rotate, the eccentric shaft 3 remains coaxial with the vessel, the scraper stirring blade 6 remains in the unfolded state, the blade does not contact the inner wall, and avoids generating additional resistance during the discharge process.

[0093] Push the centering jaws 222 open to both sides, and the friction wheel 221 presses the reactor end cover 11 again. As the end cover (i.e., the reactor body) rotates, the friction wheel 221 drives the eccentric turntable 23 to rotate very slowly with a large reduction ratio via the transmission belt 223, driven shaft 224, driving worm gear 225, and worm wheel groove 231. The eccentric turntable 23 drives the eccentric shaft 3, stirring installation shaft 4, and scraping stirring blade 6 to gradually approach the inner wall of the reactor shell 1 along the arc path. The blade shell 62 is pulled inward by the linkage of the connecting column 332, movable slide 63, and actuating column 631. The scraping layer 623 changes from horizontal to vertical. During the approach process, the scraping layer 623 first loosens the material with a small angle and low radial pressure, and then gradually increases the cutting depth and radial pressure to achieve "soft start" progressive wall scraping. The continuous rotation of the reactor body ensures full circumference scraping.

[0094] In the meantime of scraping, the handle 321 is manually pushed and pulled and rotated, so that the locking block 322 slides to the middle of the locking groove 311 and then is pushed out, the sleeve 32 is synchronously extended with the pipeline mounting cylinder 33, the pipeline 331 is extended to the fixed sleeve 31, the passage between the inside and outside of the kettle is established, the connecting column 332 is moved out, the blade shell 62 is completely folded by the movable sliding seat 63 and the pushing column 631, the scraping layer 623 is close to the inner wall, the high-efficiency scraper structure is formed, the rotation of the kettle body is synchronously transmitted to the upper threaded conveying shaft 43 by the double crank 5, the upper shaft is driven to rotate reversely at the same speed by the meshing gear 441 in the reverse gear box 44, the independent upper and lower passages are formed, the fresh cleaning liquid is uniformly infiltrated into the kettle body by the upper interactive pipeline 331, the upper threaded conveying shaft 43, the interactive groove 411 with gradually increasing size, the used liquid containing impurities is synchronously drawn back by the lower threaded conveying shaft 43, and is discharged through the lower interactive pipeline 331, so that the closed-circuit cleaning is realized, after the cleaning is completed, the handle 321 is reversely operated, the interactive pipeline 331 is retracted, the blade shell 62 is unfolded again, the friction wheel 221 is pushed away from the end cover 11 of the reaction kettle by the centering clamp 222 again, the eccentric turntable 23 is locked to the "centering" position, the device returns to the initial stirring state, and the next batch is waited.

[0095] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited to the above-mentioned embodiments, the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application, and are not used to limit the present application, various changes and improvements of the present application can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A reactor that is easy to clean, comprising a reactor shell (1) and a reactor rotating base (12) for driving its rotation, wherein a reactor end cap (11) is engaged with the open end of the reactor shell (1), characterized in that: The inner surface of the reactor end cap (11) is coaxially and rotatably provided with a centering eccentric disk (2). The output side of the centering eccentric disk (2) is provided with an eccentric rotating shaft (3). The end of the eccentric rotating shaft (3) is provided with a stirring mounting shaft (4). The stirring mounting shaft (4) is connected to the inner wall of the reactor shell (1) via an adaptive double crank (5). The outer surface of the stirring mounting shaft (4) is provided with a scraping stirring blade (6) that switches between "expanded" and "retracted" states.

2. The reactor of claim 1, wherein: The centering eccentric disk (2) includes a coaxial turntable (21), a fixed outer shell (22), and an eccentric turntable (23). The coaxial turntable (21) is rotatably connected to the reactor end cover (11) and remains stationary. A return groove (211) is symmetrically opened on its outer periphery. The fixed outer shell (22) is fixed to the outside of the coaxial turntable (21). The eccentric turntable (23) is eccentrically rotatably supported on the inside of the coaxial turntable (21) and has a worm gear groove (231) on its outer periphery.

3. The reactor vessel of claim 2, wherein: A friction wheel (221) is slidably connected to the inner surface of the fixed housing (22), a centering jaw (222) is rotatably connected to the outer surface of the friction wheel (221), a transmission belt (223) is sleeved on the outer surface of the friction wheel (221), a driven shaft (224) is rotatably connected to the inner surface of the fixed housing (22), and a driving worm gear (225) is fixedly connected to one end of the driven shaft (224).

4. The reactor of claim 3, wherein: The eccentric rotating shaft (3) includes a fixed sleeve (31), a rotating sleeve (32), and a pipe mounting cylinder (33). The fixed sleeve (31) is fixedly connected to the eccentric turntable (23) and rotates with it. The rotating sleeve (32) rotates circumferentially and is axially slidably nested inside the fixed sleeve (31). A handle (321) and a locking block (322) are fixedly connected to the outer wall of the rotating sleeve (32). The pipe mounting cylinder (33) is rotatably connected to the front end of the rotating sleeve (32) and moves axially synchronously. The interactive pipe (331) is fixed inside the pipe mounting cylinder (33) and selectively extends out of the fixed sleeve (31) or retracts to cut off during axial movement. The connecting column (332) is fixedly connected to the front end of the interactive pipe (331) and moves axially with it.

5. The reactor vessel of claim 4, wherein: The outer wall of the fixed sleeve (31) has an "I"-shaped locking groove (311). The inner surface of the locking groove (311) is slidably connected to a limit block (312). The inner surface of the locking groove (311) is fixedly connected to a block spring (313). The limit block (312) covers the transverse branch of the locking groove (311) under the action of the block spring (313). The outer surface of the rotating sleeve (32) is fixedly connected to a locking block (322).

6. The reactor vessel of claim 5, wherein: The stirring installation shaft (4) includes a rotating shaft shell (41), one end of the rotating shaft shell (41) is fixedly connected with the fixed sleeve (31), the outer surface of the rotating shaft shell (41) is provided with an alternating groove (411) which is gradually expanded from outside to inside, the inner surface of the rotating shaft shell (41) is fixedly connected with an inner partition plate (42) to divide the inner cavity of the rotating shaft shell (41) into independent channels in upper and lower directions, the inner surface of the rotating shaft shell (41) is rotatably connected with symmetrically distributed threaded conveying shafts (43), and the inner surface of the rotating shaft shell (41) is fixedly connected with a reverse gear box (44).

7. The reactor vessel of claim 6, wherein: The inner surface of the reverse gear box (44) is rotatably connected with symmetrically distributed meshing gears (441), so that the two threaded conveying shafts (43) rotate in opposite directions at the same speed, and one end of the meshing gear (441) is fixedly connected with a sealing baffle (442).

8. The reactor vessel of claim 7, wherein: The adaptive double crank (5) includes a driven rotating disc (51), the driven rotating disc (51) is fixedly connected with the threaded conveying shaft (43) in the upper direction, the outer surface of the driven rotating disc (51) is rotatably connected with an inner connecting rod (511), one end of the rotating shaft shell (41) is fixedly connected with an outer fixed disc (52), the inner surface of the reaction kettle shell (1) is fixedly connected with a driving rotating disc (53), the driving rotating disc (53) rotates synchronously with the reaction kettle shell (1), the outer surface of the driving rotating disc (53) is rotatably connected with an outer connecting rod (531), and the inner connecting rod (511) and the outer connecting rod (531) automatically compensate the length.

9. The reactor vessel of claim 8, wherein: The scraping stirring blade (6) includes a blade rotating shaft (61), the blade rotating shaft (61) is fixedly connected with the outer surface of the rotating shaft shell (41), the outer surface of the blade rotating shaft (61) is rotatably connected with a blade shell (62), the outer surface of the blade shell (62) is provided with a connecting groove (621), the outer surface of the blade shell (62) is fixedly connected with a stirring blade (622), one end of the stirring blade (622) is fixedly connected with a scraping layer (623), and the two sides of the rotating shaft shell (41) are slidably connected with equidistantly distributed movable sliding seats (63).

10. The reaction kettle convenient to clean according to any one of claims 1-9, a method for using the same comprises the following steps, characterized in that: S1, the reactor shell (1) is driven by the reactor rotating seat (12) to rotate, the reactor end cover (11) rotates with the reactor shell (1) to keep relative static, the coaxial rotating disc (21) in the centering eccentric disc (2) does not rotate with the end cover due to the minimum friction, the eccentric rotating disc (23) is locked in the "centering" position by the driving worm (225), the eccentric rotating shaft (3) is coaxial with the kettle body, the blade shell (62) of the scraping stirring blade (6) is expanded outward to the stirring blade state under the action of the movable slide (63) and the connecting column (332), the friction wheel (221) is kept away from the inner side of the reactor end cover (11) (the centering clamp jaw (222) pushes it into the back-off groove (211)), the alternate pipeline (331) is shrunk in the fixed sleeve (31), the inside and outside channels are cut off, the kettle body of the reactor shell (1) rotates to roll the materials, the expanded horizontal stirring blade (622) mixes and transfers the materials, and the reaction stage is completed; S2, after the reaction is completed, the materials are emptied, the kettle body continues to rotate at low speed, the system still keeps the "centering" state, the eccentric rotating disc (23) does not rotate, the eccentric rotating shaft (3) is still coaxial with the kettle body, the scraping stirring blade (6) maintains the expanded state, the blade does not contact the inner wall, and the additional resistance generated in the emptying process is avoided; S3, the centering clamp jaw (222) is pushed away to the two sides, the friction wheel (221) is pressed against the reactor end cover (11) again, rotates with the end cover (i.e. the kettle body), the friction wheel (221) drives the eccentric rotating disc (23) to rotate extremely slowly through the transmission belt (223), the driven rotating shaft (224), the driving worm (225) and the worm gear groove (231) with a very large speed reduction ratio, the eccentric rotating disc (23) drives the eccentric rotating shaft (3), the stirring mounting shaft (4) and the scraping stirring blade (6) to gradually approach the inner wall of the reactor shell (1) along the arc-shaped path, the blade shell (62) is inlinked to the connecting column (332), the movable slide (63) and the pushing column (631) to fold inward, the scraping layer (623) is converted from horizontal to vertical, during the approaching process, the scraping layer (623) first loosens the materials at a small angle and low radial pressure, and then gradually increases the cutting depth and radial pressure, realizes the "soft start" type gradual scraping, and the continuous rotation of the kettle body ensures the scraping of the whole circumference; S4, while scraping, manually push and pull and rotate the handle (321), so that the locking block (322) slides to the middle of the locking groove (311), then pushes out, the sleeve (32) and the pipeline mounting cylinder (33) are synchronized to extend out, the interaction pipeline (331) extends out the fixed sleeve (31), establishes the channel inside and outside the kettle, the connecting column (332) moves out, through the movable sliding seat (63) and the push column (631), the blade shell (62) is completely folded, the scraping layer (623) is tightly attached to the inner wall to form a sealed scraper, the double crank (5) is adapted to synchronously transmit the rotation of the kettle body to the upper threaded conveying shaft (43), the upper shaft drives the lower shaft to rotate in the opposite direction at the same speed through the meshing gear (441) in the reverse gear box (44), forming independent upper and lower channels, fresh cleaning liquid is uniformly infiltrated into the kettle body through the upper interaction pipeline (331), the upper threaded conveying shaft (43) and the gradually increasing interaction groove (411), the used liquid containing impurities is synchronously pumped back through the lower threaded conveying shaft (43), and is discharged through the lower interaction pipeline (331), realizing closed loop cleaning. After cleaning, reverse operation of the handle (321) makes the interaction pipeline (331) retract, the blade shell (62) re-expands, the friction wheel (221) is pushed away from the end cover by the centering clamp (222) again, the eccentric turntable (23) is locked to the "centering" position, and the device returns to the initial stirring state, waiting for the next batch.

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