Stirring device for fly ash treatment homogenizing tank and homogenizing tank for fly ash treatment
By using a mixing mechanism driven by a double-beam bridge driving and submersible motor in the stirring device of a large fly ash homogenizer, the existing mixer has been solved, and efficient stirring of a large homogenizer is achieved.
Patent Information
- Application Number
- CN202510535621.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-27
- Publication Date
- 2025-06-03
AI Technical Summary
When existing mixers deal with large fly ash homogenized pools, their power arms are small, their mixing efficiency and quality are low, and they cannot meet the needs of large homogenized pools.
The double-beam bridge-type driving drives the circular track and the stirring mechanism, and drives the stirring arm shaft through the submersible motor and reducer, and uses multiple blades and adjustable angle stirring to achieve efficient stirring.
It overcomes the problem of high power requirements of traditional stirring devices, and realizes efficient stirring of large homogeneous tanks, with large stirring power and high efficiency, and meets the needs of large homogeneous tanks.
Smart Images
Figure CN120079304A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of fly ash treatment, in particular to a large-scale stirring device for a homogenizing tank used for fly ash treatment. Background Art
[0002] In industrial production, it is a common process to make the overall material uniform through stirring. Usually, a stirrer is installed at the center of a material tank. By rotating the stirring shaft of the stirrer, the blades are driven to rotate to stir the material. The existing stirrer consists of a motor, a reducer, a stirring shaft, blades and a bracket. The bracket is installed above the tank wall, spanning the entire tank, and the stirrer is installed at the center of the bracket (which is also the center of the tank). The reducer is installed at the center of the bracket, and its output shaft is vertically downward; the output shaft of the reducer is connected to the stirring shaft, and the blades are installed on the stirring shaft; the motor drives the stirring shaft to rotate through the reducer, drives the blades to rotate, and the stirred material rotates with the blades to mix the material evenly.
[0003] The existing stirrers all drive the blades to rotate to stir the material through the central stirring shaft. When the diameter of the tank is large, the rotation diameter of the stirrer blades is also large, and the resistance of the material to the blades will be very large; when the blades rotate at a constant speed, the driving torque is equal to the resistance torque, and the diameter of the stirring shaft is very small compared with the rotation diameter of the blades, that is, the driving arm is very small, which requires a large driving force, that is, the power of the motor needs to be very large, the stirring shaft needs to be very thick, and the strength of the connecting fasteners needs to be very high. If the diameter of the tank is very large, it is almost impossible to find a matching motor, reducer and stirring shaft.
[0004] Fly ash is a substance generated after garbage incineration. Fly ash contains chlorides, toxic and harmful heavy metals, and dioxins, and belongs to hazardous solid waste, which must be treated harmlessly. Using fly ash as the main raw material, coal gangue and waste glass as auxiliary materials, combined with water, dry clay powder and trace additives, through processes such as homogenization, mechanical grinding, dehydration, mud mixing, forming, and sintering, fly ash is prepared into a gray ceramic material that can be used as an industrial additive, which not only completes the harmless treatment of fly ash, but also makes it resourcefully utilized, and the finished product has relatively high benefits, which is the direction of harmless and resourceful utilization of fly ash.
[0005] Making fly ash into different industrial additives (such as ceramic fiber additives, asbestos fiber additives, soft magnetic iron additives, etc.) requires the components of the finished product after fly ash treatment to be stable and consistent. However, due to the random variation of waste components, the components of fly ash after incineration also vary randomly. During the fly ash treatment process, additives with different components must be added and mixed evenly according to the different components of fly ash to ensure the stability and consistency of the components of the final finished product. During production, the fly ash in the fly ash storage tank (homogenization tank) must be stirred, left standing for infiltration, and then stirred again to make the components of the fly ash slurry in the same homogenization tank consistent. Then, the fly ash slurry is sampled and tested to determine the formula of the added auxiliary materials and additives. If the homogenization tank is small, it is necessary to sample and test frequently and adjust the formula frequently, which increases the production technical difficulty and reduces the production efficiency. For industrial production, a stable production process and a relatively stable formula are required, which requires the volume of the homogenization tank to be large enough so that a pool of fly ash slurry (one formula) can meet the production needs for half a month to one month.
[0006] Therefore, for a large fly ash homogenization tank, a new mixer is needed to overcome the disadvantages of the existing mixer, such as a very small driving power arm of the central shaft, low mixing efficiency and mixing quality, and inability to adapt to a large homogenization tank. Summary of the Invention
[0007] The purpose of the present invention is to provide a brand-new mixing device that can adapt to and meet the needs of mixing in a large homogenization tank in view of the above-mentioned disadvantages.
[0008] The technical solution of the present invention is realized as follows: A mixing device for a fly ash treatment homogenization tank includes a traveling crane. The traveling crane is a double-girder bridge crane. One hoist is installed at each end of the double main girders of the double-girder bridge crane, and a total of four hoists are installed. The four hoists hang a circular track through four hanging points. The four hoists adopt a set of power supply devices and lift synchronously; A power supply slip ring box is installed on the lower surface of the traveling crane. An electric slip ring is installed inside the power supply slip ring box. The electric slip ring includes a fixed part and a rotating part. The fixed part is fixedly installed in the power supply slip ring box and is connected to the input lead wire; the rotating part can rotate freely and is connected to the output lead wire. The output lead wire is led out downward in the form of a spring cable; the rotating part of the electric slip ring extends downward out of the power supply slip ring box, and the part of the rotating part extending out of the power supply slip ring box is inserted and nested with a telescopic tube, and the telescopic tube is led out downward; There is also a stirring mechanism used in conjunction with a circular track. The stirring mechanism has a central frame, which is arranged in the center of the circular track. The central frame has a side wall, and several stirring arm shafts are installed on the side wall of the central frame through bearings. The several stirring arm shafts radiate outwards in a spoke-like manner, and each stirring arm shaft can rotate around its own axis through a bearing. A cable storage pipe is welded on the upper surface of the central frame. The bottom surface of the cable storage pipe is a distribution box, which is also installed on the upper surface of the central frame. Wiring terminals are installed inside the distribution box. The cable storage pipe has an up-and-down structure. A pipe threading junction box is welded at the upper end of the cable storage pipe. The upper surface of the pipe threading junction box is welded to the lower end of the telescopic pipe. The spring-type cable passes down through the telescopic pipe, the pipe threading junction box, and the cable storage pipe and is connected to the distribution box, and branch wires are led out from the wiring terminals of the distribution box. Blades are provided on each stirring arm shaft. A stirring arm wheel is installed at the end of the stirring arm shaft. The stirring arm wheel is placed on the circular track and can move on it. A sealing box is provided inside the stirring arm wheel. The sealing box is installed on the stirring arm shaft inside the stirring arm wheel through a bearing. A reducer mounting plate is welded to the upper end of the sealing box. A reducer and a submersible motor are installed on the reducer mounting plate. A sprocket one is key-connected to the stirring arm shaft inside the sealing box. A sprocket two is key-connected to the output shaft of the reducer. The sprocket one and the sprocket two are connected by a chain. The two sprockets and the chain are all inside this sealing box, and lubricating oil is filled in the sealing box. The submersible motor has a submersible motor junction box. Several pipe threading tubes are inserted into the side wall of the pipe threading junction box. The number of pipe threading tubes is equal to the number of stirring arm shafts. The other ends of the pipe threading tubes are connected to the junction box of the submersible motor. Corresponding to each pipe threading tube, a connecting pipe is provided. The lower end of the connecting pipe is welded to the distribution box, and the upper end of the connecting pipe communicates with the pipe threading tube. The branch wires led out from the distribution box lead to the submersible motor junction box through the respective connecting pipes and pipe threading tubes.
[0009] Furthermore, an auxiliary wheel is installed on each side of the sealing box corresponding to the stirring arm wheel. The auxiliary wheels are also placed on the circular track.
[0010] Furthermore, the circular track has a downward beveled edge structure.
[0011] Furthermore, the blades are installed on the stirring arm shafts in groups. Each stirring arm shaft has multiple blades. The multiple blades on each stirring arm shaft are installed at different angles of left, up, right, and down along the radial direction of the stirring arm shaft. Furthermore, the angles at which the blades are installed on the stirring arm shafts can be freely adjusted.
[0012] A homogenization tank for fly ash treatment, characterized in that: it is a group of homogenization tanks arranged linearly, and a group of homogenization tanks has multiple sub-homogenization tanks. Each group of homogenization tanks shares a set of stirring devices. On both sides outside the outer wall of the homogenization tank, traveling track supports are arranged, and traveling track beams are installed on the supports. Traveling tracks are fixed on the track beams. Additionally, the aforementioned stirring device is installed on the traveling track. The stirring device is installed on the traveling track through a traveling crane, and the traveling crane can move on the traveling track, thereby driving the circular track and the stirring mechanism to move.
[0013] The beneficial effects of the present invention are as follows: (1) Such a stirring device provides power at the shaft end, overcoming the disadvantage of high power requirements of traditional stirring devices, and can stir large-scale homogenization tanks with large stirring power and high stirring efficiency. (2) A group of fly ash treatment homogenization tanks are arranged linearly in groups, and a set of stirring devices can stir multiple sub-homogenization tanks, better meeting the needs of large-scale stirring. Description of the Drawings
[0014] Figure 1 It is a schematic structural diagram of the stirring device for the fly ash treatment homogenization tank; Figure 2 It is Figure 1 Another perspective schematic diagram of Figure 3 It is Figure 1 An enlarged schematic diagram of part A of Figure 4 It is Figure 1 An enlarged schematic diagram of part B of Figure 5 It is Figure 1 The front view of Figure 6 It shows Figure 5 The internal structure and positional relationship diagram of the area at part C of Figure 7 It is Figure 6 The left view of Figure 8 It shows Figure 5 The internal structure and positional relationship diagram of the area at part D of Figure 9 It is Figure 8 An enlarged schematic diagram of part E of Figure 10 It is a schematic diagram showing the internal structure of the power supply slip ring box 6; Figure 11 It is a schematic diagram of the homogenization tank for fly ash treatment of the present invention; Figure 12 It is Figure 11 An enlarged schematic diagram of part H of
[0015] Figure 13 It is a schematic diagram of the blade arrangement on the stirring arm; Figure 14 It is a comparison diagram of different angles of the blade on the stirring arm shaft.
[0016] Wherein: 1. Traveling crane; 2. Hoist; 3. Circular track; 3b. Oblique cutting edge; 4. Steel wire rope; 5. Through-bridge; 6. Power supply slip ring box; 7. Electrical slip ring; 71. Fixed part; 72. Rotating part; 73. Input lead; 74. Output lead; 8. Spring-type cable; 9. Telescopic pipe; 10. Central support; 11. Bearing; 12. Stirring arm shaft; 13. Cable storage pipe; 14. Junction box; 15. Terminal; 16. Through-pipe splice box; 17. Branch wire; 18. Blade; 19. Stirring arm wheel; 21. Reducer mounting plate; 22. Reducer; 23. Submersible motor; 24. Sprocket one; 25. Sprocket two; 26. Chain; 27. Sealing box; 28. Auxiliary wheel; 29. Submersible motor junction box; 30. Through-pipe; 31. Connecting pipe; 32. Traveling crane track support; 33. Traveling crane track beam; 34. Traveling crane track; 71a. Carbon brush holder; 71b. Carbon brush; 72a. Bearing; 72b. Slip ring group shaft; 72c. Slip ring; Specific embodiments
[0017] The technical solution of the present invention will be further described below in conjunction with embodiments.
[0018] As Figure 1-9 shown, a stirring device for a fly ash treatment homogenization tank includes a traveling crane 1. The traveling crane is a double-girder bridge crane. A hoist 2 is installed at each end of the double main girders of the double-girder bridge crane, and a total of four hoists are installed. The four hoists hang a circular track 3 through four hanging points. In the figure, 4 is the steel wire rope for the hoist to hang the circular track. The four hoists adopt a set of power supply devices and lift synchronously, so as to ensure the stable lifting of the circular track; A through-bridge 5 is installed between the two main girders of the traveling crane. A power supply slip ring box 6 is installed on the lower surface of the through-bridge. An electrical slip ring 7 is installed inside the power supply slip ring box. The electrical slip ring includes a fixed part 71 and a rotating part 72. The fixed part is fixedly installed in the power supply slip ring box and connected to the input lead; the rotating part can rotate freely and is connected to the output lead 74. The output lead is constrained in the spring-type cable shell and led out downward in the form of a spring-type cable 8. The rotating part of the electrical slip ring extends downward out of the power supply slip ring box 6. A telescopic pipe 9 is sleeved at the position of the extended part of the rotating part. The upper end of this telescopic pipe is interference-fitted and nested on the outer periphery of the extended part of the rotating part, and the telescopic pipe is led out downward; For the structure of the power supply slip ring box, please refer to Figure 10 ; There is also a stirring mechanism used in conjunction with the circular track. The stirring mechanism has a central frame 10, which is located in the center of the circular track. There are no shape requirements for the central frame, as long as it can achieve the installation function. The central frame has a side wall, and several stirring arm shafts 12 are installed on the side wall of the central frame through bearings 11. The number of stirring arm shafts is 3 to 8, and several stirring arm shafts are scattered radially around. The stirring arm shafts can rotate around their own axes through bearings; the rotation direction of the stirring arm shafts is as shown by F1 in Figure 8. A cable storage tube 13 is welded on the upper surface of the central frame. The bottom surface of the cable storage tube is a distribution box 14, which is also installed on the upper surface of the central frame. Wiring terminals 15 are installed inside the distribution box. The cable storage tube has an up-and-down structure. A wiring pipe splice box 16 is welded at the upper end of the cable storage tube. The upper surface of the wiring pipe splice box is welded to the lower end of the telescopic tube 9; the spring-type cable passes down through the telescopic tube 9, the wiring pipe splice box 16, and the cable storage tube 13 and is connected to the distribution box 14, and a branch wire 17 is led out from the wiring terminal of the distribution box; Blades 18 are provided on each of the stirring arm shafts. A stirring arm wheel 19 is installed at the other end of the stirring arm shaft. The stirring arm wheel is placed on the circular track, and the wheel edge catches the inner edge of the circular track; a sealing box 27 is provided inside the stirring arm wheel. The sealing box is installed on the stirring arm shaft inside the stirring arm wheel through a bearing. A reducer mounting plate 21 is welded to the upper end of the sealing box. A reducer 22 and a submersible motor 23 are installed on the reducer mounting plate; a sprocket one 24 is key-connected to the stirring arm shaft inside the sealing box, a sprocket two 25 is key-connected to the output shaft of the reducer, and the sprocket one and the sprocket two are connected by a chain 26. Both sprockets and the chain are inside this sealing box. Lubricating oil is filled in the sealing box to lubricate the two sprockets and the chain, and the heat generated by the friction of the two sprockets and the chain is also conducted to the outer wall. An auxiliary wheel 28 is installed on each side of the sealing box corresponding to the stirring arm wheel. The auxiliary wheel is also placed on the circular track; The submersible motor has a submersible motor junction box 29; A number of wiring pipes 30 are inserted into the side wall of the wiring pipe splice box. The number of wiring pipes is equal to the number of stirring arm shafts. The other end of the wiring pipe is connected to the submersible motor junction box 29; Corresponding to each wiring pipe, a connecting pipe 31 is provided. The lower end of the connecting pipe is welded to the distribution box 14, and the upper end of the connecting pipe communicates with the wiring pipe 30. The branch wire 17 led out from the distribution box passes through the connecting pipes 31 and the wiring pipes 30 to the submersible motor junction box 29; Figure 9 In the figure, the blue is the branch wire 17, and the red is the connecting pipe 31.
[0019] The above is the structure of this stirring device. The following introduces its usage method.
[0020] Usage method: When the homogenization tank needs to be stirred, park the traveling crane above the homogenization tank, start the hoist (four units), and lower the circular track 3 into the water of the homogenization tank. Due to gravity, the entire mixer sinks into the water of the homogenization tank. Then start the submersible motor 23. The submersible motor rotates. During this process, the external power supply supplies power to the submersible motor through the slip ring, spring-type cable, junction box, and branch connection wire, enabling the submersible motor to work, driving the reducer to rotate, causing the sprocket II on the output shaft of the reducer to rotate. The sprocket II rotates and drives the sprocket I to rotate through the chain, thereby causing the stirring arm shaft to rotate. The blades on the stirring arm shaft rotate accordingly to stir the slurry in the tank. As the stirring arm shaft rotates, the stirring arm wheels outside the stirring arm shaft rotate on the circular track, pushing each stirring arm shaft to rotate around the axis of the central frame. The rotation direction of each stirring arm shaft around the central frame is as shown in Figure 8 shown by F2 in ; In this way, the entire slurry in the homogenization tank is stirred and homogenized. While homogenizing, the hoist can be operated to lift and lower, and the hanging circular track can move up and down in the homogenization tank. The stirring arm moves up and down with the circular track, stirring and homogenizing the slurry at all levels up and down in the homogenization tank;
[0021] After the slurry is stirred evenly, operate the hoist to lift the circular track and the stirring device out of the homogenization tank. The slurry that has been stirred evenly in the homogenization tank is left to stand for infiltration and aging. According to the production process, it is left to stand for a certain period of time. The mud in the homogenization tank precipitates, and clear water covers the upper layer. The mud is stored in the homogenization tank for later use. Compared with the traditional stirring device, this stirring device overcomes the problems of small transmission power and insufficient stirring efficiency and can adapt to large homogenization tanks of any size.
[0022] Furthermore, the circular track has a downward inclined edge portion 3b structure.
[0023] By setting the inclined edge portion, when the homogenization tank needs to be stirred, the circular track can sink to the bottom of the tank under its own weight. The blades on the stirring arm insert into the mud and stir the mud. While stirring, it sinks. When the stirring reaches the concentration specified by the production process and is stirred evenly, stop the hoist, and the circular track no longer descends, no longer stirring up new mud. This makes it more convenient to use.
[0024] Furthermore, the blades are installed in groups on the stirring arm shaft. Each stirring arm shaft has multiple blades. The multiple blades on each stirring arm shaft are installed at different angles of left, up, right, and down along the radial direction of the stirring arm shaft, as shown in Figure 13as shown
[0025] This setting saves blades and has a low cost.
[0026] Furthermore, the angle at which the blade is mounted on the stirring arm shaft can be freely adjusted. Figure 14 It is a comparison diagram of different angles of the blade on the stirring arm shaft.
[0027] Adjust the angle of blade installation. When the angle of blade installation is within a certain range, generally 0 - 90 degrees, it can make the blade stir up the slurry as it rotates with the stirring arm shaft, and at the same time make the slurry flow from the center of the homogenization tank to the edge, impacting the mud attached to the inner wall of the homogenization tank.
[0028] A homogenization tank for fly ash treatment, as Figure 11 , 12 shown, is characterized in that: it is a group of linearly arranged homogenization tanks. A group of homogenization tanks has multiple sub - homogenization tanks. Each group of homogenization tanks shares a set of stirring devices. On both outer sides of the outer wall of the homogenization tank, traveling track columns 32 are provided. A traveling track beam 33 is installed on the columns, and a traveling track 34 is fixed on the track beam. Also, the aforementioned stirring device is installed on the traveling track. The stirring device is installed on the traveling track through a traveling vehicle, and the traveling vehicle can move on the traveling track, thereby driving the circular track and the stirring mechanism to move.
[0029] Next, the mechanism inside the power supply slip - ring box will be further analyzed and introduced.
[0030] As Figure 10 shown, a bearing 72a is installed on the top wall inside the power supply slip - ring box. A slip - ring group shaft 72b is installed on the bearing. The slip - ring group shaft can rotate with the bearing. The slip - ring group shaft is a hollow tubular structure. Several turns of slip - rings 72c are inlaid on the side wall of the slip - ring group shaft. The slip - rings are connected to output leads 74, and the output leads pass through the side wall of the slip - ring group shaft and lead downward; a carbon - brush holder 71a and carbon brushes 71b are installed on the side wall inside the power supply slip - ring box. The carbon brushes are connected to input leads, and the carbon brushes are in contact with the slip - rings.
[0031] In this way, during the continuous rotation of the slip - ring group shaft, the carbon brushes are in contact with the slip - rings to supply power, meeting the need for power supply during rotation. Among them, the input leads are connected to an external power source. The external power source passes through the input leads, carbon brushes, slip - rings, and is led out through the output leads, and is led downward in the form of a spring - type cable 8. The upper end of the telescopic tube is nested around the lower end of the slip - ring group shaft.
[0032] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any person skilled in the relevant art can, without departing from the technical solution of the present invention, make some changes or modifications to equivalent embodiments by using the technical content disclosed above. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. A stirring device for a fly ash treatment homogenization tank, characterized in that: The utility model relates to a stirring device, which is composed of a crane and a stirring mechanism suspended from the crane.
2. The stirring device for a fly ash treatment homogenization tank according to claim 1, characterized in that: The crane adopts a double-beam bridge crane, and a hoist is fixedly installed under each of the two end beams of the double main beams of the crane, with a total of four hoists. The four hoists use a set of power supply control devices and are raised and lowered synchronously. The four hoists are suspended on a circular track; the stirring mechanism is a mechanism composed of multiple stirring arm shafts connected to a center frame, and the multiple stirring arm shafts connected to the center frame are in a spoke state structure. The stirring mechanism is placed on the circular track and can rotate and run on it along the circular track.
3. A stirring device for a fly ash treatment homogenization tank according to claim 2, characterized in that: The end shaft key of the stirring arm shaft is connected to install the stirring arm wheel, the stirring arm wheel is placed on the circular track, the wheel edge is clamped on the inner vertical edge of the circular track, the central end shaft of the stirring arm shaft is connected to the center frame through a bearing, and multiple stirring arms are connected to the center frame to form a whole, which is mounted on the circular track.
4. A stirring device for a fly ash treatment homogenization tank according to claim 3, characterized in that: Each stirring arm shaft is equipped with a driving device, which can drive the stirring arm wheel to rotate, so that the stirring arm wheel rotates on a circular track, and drives the stirring mechanism to rotate around the central axis of the center frame, thereby stirring the slurry in the entire homogenizing tank to rotate with the stirring arm shaft and stir and homogenize.
5. A stirring device for a fly ash treatment homogenization tank according to claim 4, characterized in that: A plurality of blades are installed on each stirring arm shaft, and the plurality of blades on each stirring arm shaft are installed at different angles to the left, upward, right and downward along the radial direction of the stirring arm shaft.
6. The stirring device for a fly ash treatment homogenization tank according to claim 5, characterized in that: The angle at which the blade is installed on the stirring arm shaft can be adjusted. When in use, the angle of the blade on the stirring arm shaft is an angle that enables the blade to rotate with the stirring arm shaft to stir up the slurry while causing the slurry to flow from the center to the edge of the homogenizing tank, thereby impacting the mud attached to the inner wall of the homogenizing tank.
7. A stirring device for a fly ash treatment homogenization tank as described in claims 4, 5 and 6, characterized in that The circular track has a downwardly inclined blade structure.
8. A stirring device for a fly ash treatment homogenization tank as claimed in claim 4, characterized in that: The driving device is a set of submersible motor, reducer and chain transmission mechanism fixedly installed at the end of the stirring arm shaft. The submersible motor, reducer and chain transmission mechanism are sealed and installed at the end of the stirring arm shaft. The stirring mechanism supplies power to the submersible motor through an electric slip ring and a spring cable.
9. A stirring device for a fly ash treatment homogenization tank according to claim 8, characterized in that: A sealing box is fixedly installed at the end of the stirring arm shaft, and the sealing box is installed on the stirring arm shaft inside the stirring arm wheel through a bearing. A reducer mounting plate is welded on the upper end of the sealing box, and a reducer and a submersible motor are installed on the reducer mounting plate; the stirring arm shaft key inside the sealing box is connected to sprocket one, and the key on the output shaft of the reducer is connected to sprocket two, sprocket one and sprocket two are connected by a chain, and the two sprockets and the chain are in this sealing box, and lubricating oil is filled in the sealing box.
10. A homogenizing tank for fly ash treatment, characterized by: It is a group of linearly arranged homogenizing tanks, one group of homogenizing tanks has multiple sub-homogenizing tanks, each group of homogenizing tanks shares a set of stirring devices, and track pillars are arranged on both sides of the outer side of the outer wall of the homogenizing tank, and the track beam is installed on the pillar, and the track is fixed on the track beam. The stirring device described in claims 1-9 is installed on the track, and the stirring device is installed on the track by a crane. The crane can move on the track, thereby driving the circular track and the stirring mechanism to move.