Device and method for preparing dimethylthiotoluenediamine with impurity removal structure

Abstract

The present invention relates to the field of chemical production technology, and in particular to a dimethylthiotoluene diamine preparation device and preparation method with an impurity removal structure. The device comprises a bracket, the bracket is fixedly connected to a kettle body, the kettle body is rotatably connected to a transmission shaft, the transmission shaft is fixedly connected to symmetrically distributed stirring blades, the kettle body is fixedly connected to an L-shaped frame, the L-shaped frame is provided with an electric telescopic rod, the telescopic end of the electric telescopic rod is rotatably connected to an n-shaped part, the n-shaped part is fixedly connected to an extrusion plate, the extrusion plate is connected to a symmetrically distributed first scraper through a spring, the first scraper is fixedly connected to a symmetrically distributed second hydraulic telescopic rod, and the telescopic ends of the second hydraulic telescopic rods on the same side of different first scrapers are commonly fixedly connected to a scraper ring. The present invention scrapes impurities on the vertical surfaces of the two stirring blades by moving the two first scrapers downward, and cleans the surfaces of the two first scrapers and the upper side surfaces of the adjacent stirring blades by moving the scraper rings on the left and right sides in reverse, thereby ensuring the stirring effect of the stirring blades.

Description

Technical Field

[0001] The invention relates to the technical field of chemical production, and in particular to a device and a method for preparing dimethylthiotoluenediamine with an impurity removal structure. Background Art

[0002] Dimethylthiotoluenediamine is an organic compound, which is usually a colorless or light yellow liquid in appearance and is insoluble in water. It is mainly used as a synthetic intermediate for preparing other organic compounds. The dimethylthiotoluenediamine preparation device is mainly a reactor. During production, the raw materials required for the production of dimethylthiotoluenediamine are added into the reactor and stirred to allow the raw materials to react to generate a dimethylthiotoluenediamine solution.

[0003] In the process of producing dimethylthiotoluenediamine, a catalyst is usually added to speed up the reaction process. However, the added catalyst will react with the raw materials required for dimethylthiotoluenediamine to produce by-products. Therefore, it is necessary to add a reaction liquid to make it a substance insoluble in dimethylthiotoluenediamine (i.e., impurities) to avoid affecting the purity of the produced dimethylthiotoluenediamine solution. However, the impurities generated by adding the reaction liquid will adhere to the stirring blade, affecting the stirring effect of the stirring blade and affecting the preparation efficiency of dimethylthiotoluenediamine. Summary of the invention

[0004] In order to solve the shortcoming of the existing preparation device that impurities may be attached to the stirring blades during stirring and affect the stirring effect, the present invention provides a dimethylthiotoluene diamine preparation device and a preparation method with an impurity removal structure.

[0005] The technical solution of the present invention is as follows: a dimethylthiotoluene diamine preparation device with an impurity removal structure comprises a bracket, a kettle body is fixedly connected to the bracket, the kettle body is provided with a feed port and two discharge ports, a motor is fixedly connected to the bracket, the output shaft of the motor is fixedly connected to a transmission shaft rotatably connected to the kettle body, the transmission shaft is fixedly connected with symmetrically distributed stirring blades, an L-shaped frame is fixedly connected to the upper side of the kettle body, an electric telescopic rod is provided on the L-shaped frame, the telescopic end of the electric telescopic rod is rotatably connected to an n-shaped piece, the upper side of the kettle body is rotatably connected to a rotating disk slidably connected to the n-shaped piece, the rotating disk is fixedly connected to the upper side of the transmission shaft, and the lower part of the n-shaped piece is fixedly connected to a transmission shaft rotatably connected to the transmission shaft. An extrusion plate that slides with the moving shaft, the extrusion plate is connected to a symmetrically distributed first scraper through a spring, the first scraper is fixedly connected to a first hydraulic telescopic rod and a symmetrically distributed second hydraulic telescopic rod, the extrusion plate is fixedly connected to the telescopic end of the first hydraulic telescopic rod, the fixed part of the second hydraulic telescopic rod is connected to the fixed part of the adjacent first hydraulic telescopic rod through a pipeline, the telescopic ends of the second hydraulic telescopic rods on the same side of different first scrapers are commonly fixedly connected to a scraper ring that slides with the symmetrically distributed first scrapers, and symmetrically distributed limit blocks that are respectively limited and matched with the adjacent first scrapers are fixedly connected to one side of the transmission shaft close to the symmetrically distributed stirring blades.

[0006] Furthermore, the back sides of the symmetrically distributed first scrapers are each provided with a symmetrically distributed cambered surface, so as to reduce the adhesion of impurities on the surface of the first scraper.

[0007] Furthermore, it also includes a first scraping component, which is arranged on the transmission shaft. The first scraping component is used to scrape the inner wall of the kettle body. The first scraping component includes a connecting plate, which is fixed to the transmission shaft. The connecting plate is fixed with a sliding shell, and a second scraper is slidably connected in the sliding shell. The connecting plate is provided with a second scraping component for assisting in cleaning impurities on the inner wall of the kettle body.

[0008] Furthermore, the second scraper assembly includes a connecting piece, the connecting piece is fixedly connected to a side of the connecting plate away from the sliding shell, the connecting piece is rotatably connected to a fixed shaft on the side of the connecting piece away from the connecting plate, the fixed shaft is fixedly connected to a rotating piece, and the rotating piece is located inside the connecting piece, the lower side of the rotating piece is fixedly connected to a first fixed column, the first fixed column is rotatably connected to the connecting piece, the lower end of the first fixed column is fixedly connected to a first cover plate, the lower side of the first cover plate is fixedly connected to a rotating cylinder, the lower side of the rotating cylinder is fixedly connected to a second cover plate, a third scraper evenly distributed in the circumferential direction is slidably connected to the rotating cylinder, the connecting piece and the fixed shaft are jointly provided with a one-way transmission component for limiting the rotation of the third scraper, the extrusion plate is provided with a cleaning component for cleaning the second scraper and the third scraper, and the rotating cylinder is provided with an adjustment component for enhancing the cleaning effect on the inner wall of the kettle body.

[0009] Further, the cleaning assembly includes a guide shell, the guide shell is fixedly connected to the extrusion plate, a slider is slidably connected in the guide shell, an elastic member is arranged in the guide shell, both ends of the elastic member are respectively fixedly connected to the extrusion plate and the slider, an end of the slider away from the extrusion plate is fixedly connected to a cleaning plate, a side of the extrusion plate away from the guide shell is fixedly connected to a second fixed column, an end of the second fixed column away from the extrusion plate is fixedly connected to a cleaning ring, wherein the cleaning plate is slidably matched with the second scraper, the cleaning ring is slidably matched with the third scraper evenly distributed in the circumferential direction, and the cleaning ring is slidably matched with the rotating cylinder.

[0010] Furthermore, the one-way transmission assembly includes a one-way gear, which is installed on the fixed shaft. The inner wall of the kettle body is fixedly connected to a gear ring, and the one-way gear rotates to engage with the gear ring. The lower side of the connecting piece is fixedly connected to an elastic telescopic rod, and the upper side of the first cover plate is fixedly connected to an extrusion block, and the elastic telescopic rod is extruded and matched with the extrusion block.

[0011] Furthermore, the cross section of the extrusion block is a right triangle, and one of the right-angled sides is in contact with the upper side of the first cover plate to limit the telescopic portion of the elastic telescopic rod.

[0012] Further, the adjustment assembly includes symmetrically distributed fixed plates, the symmetrically distributed fixed plates are all fixedly connected to the lower side of the n-shaped part, both sides of the connecting plate are fixedly connected with T-shaped blocks, the T-shaped blocks are slidably matched with the n-shaped part, one of the T-shaped blocks is fixedly connected with a symmetrically distributed third hydraulic telescopic rod, a spring is arranged in the third hydraulic telescopic rod, the telescopic ends of the symmetrically distributed third hydraulic telescopic rod are squeezed and matched with the adjacent fixed plates, the rotating cylinder is slidably connected with a circumferentially uniformly distributed fourth scraper, the fourth scraper is slidably matched with the cleaning ring, the circumferentially uniformly distributed fourth scraper is arranged at intervals with the circumferentially uniformly distributed third scraper, both sides of the circumferentially uniformly distributed fourth scraper are fixedly connected with a first U-shaped plate, both sides of the rotating cylinder are fixedly connected with connecting pieces, the connecting pieces are slidably connected with circumferentially uniformly distributed connecting rods, The first U-shaped plates are respectively fixed to adjacent connecting rods of adjacent connecting pieces, second U-shaped plates are fixed to both sides of the third scraper, the second U-shaped plates are squeezed and matched with the adjacent first U-shaped plates, a spring is fixed between the second U-shaped plate and the rotating cylinder, the connecting piece is provided with a first cavity, the connecting piece and the first cavity of the adjacent third hydraulic telescopic rod fixing part are communicated through a pipeline, a second cavity is provided in the middle of the rotating piece, the second cavity of the rotating piece is communicated with the first cavity of the connecting piece, the first fixed column is provided with a third cavity, the third cavity of the first fixed column is communicated with the second cavity of the rotating piece, the third cavity of the first fixed column is communicated with the connecting pieces on both sides of the rotating cylinder, the sliding shell is provided with a fourth cavity, and the fourth cavity of the sliding shell is communicated with the fixing part of the adjacent third hydraulic telescopic rod through a pipeline.

[0013] Furthermore, the cross-sectional area of ​​the fourth cavity of the sliding shell is larger than the cross-sectional area of ​​the first cavity of the connecting member, so as to control the extension speed of the second scraper and the fourth scraper.

[0014] The preparation method of dimethylthiotoluenediamine is based on a dimethylthiotoluenediamine preparation device with an impurity removal structure, and comprises the following steps:

[0015] S1: adding the raw material of dimethylthiotoluenediamine into the kettle body, so that the raw material of dimethylthiotoluenediamine, the catalyst and the reaction liquid reach the required liquid level for working;

[0016] S2: Start the motor, the output shaft of the motor drives the transmission shaft and the stirring blade to rotate, stirring the raw materials in the kettle body, and at the same time the transmission shaft drives the second scraper and the third scraper on the far left to rotate, scraping off the impurities adhering to the inner wall of the kettle body, thereby reducing the amount of impurities adhering to the inner wall of the kettle body;

[0017] S3: Start the telescopic end of the electric telescopic rod to move downward, the first scraper moves downward to scrape off impurities attached to the side of the stirring blade, the scraper ring scrapes off impurities on the surface of the first scraper and the upper side of the stirring blade, the cleaning plate and the cleaning ring move downward, the second scraper, the third scraper rotates, the fourth scraper and the rotating drum surface impurities are scraped off, then the telescopic end of the electric telescopic rod is controlled to move upward and reset, and the above operation process is repeated for regular cleaning;

[0018] S4: After the dimethylthiotoluenediamine solution is prepared, the solution is discharged through a filter mesh port to separate it from impurities;

[0019] S5: The output shaft of the control motor drives the transmission shaft to rotate in the opposite direction, the third scraper rotates to cut the impurities on the inner wall of the kettle body, and the second scraper scrapes the impurities on the inner wall of the kettle body;

[0020] S6: Control the telescopic end of the electric telescopic rod to move upward to the specified position and then stop, the third scraper and the fourth scraper gradually move outward to cut the impurities on the inner wall of the kettle body, which is conducive to scraping the impurities close to the inner wall of the kettle body when the second scraper gradually moves outward, and then control the telescopic end of the electric telescopic rod to move downward and reset;

[0021] S7: After the cleaning is completed, the motor is turned off, the above-mentioned parts are reset one after another, cleaning liquid is added into the kettle body, and impurities are discharged from the filter-free port.

[0022] Compared with the prior art, the present invention has the following advantages: 1. The present invention scrapes impurities on the vertical surfaces of the two stirring blades by moving the two first scrapers downward, and cleans the surfaces of the two first scrapers and the upper sides of the adjacent stirring blades by moving the scraper rings on the left and right sides backward, thereby ensuring the stirring effect of the stirring blades and the preparation efficiency of dimethylthiotoluene diamine.

[0023] 2. The present invention sets the back sides of the two first scrapers to symmetrically distributed arc surfaces, so that when the first scrapers scrape the two stirring blades, water flows along the upper and lower sides of the arc surfaces on the first scrapers to flush the surface of the first scrapers, thereby reducing the adhesion of impurities on the surface of the first scrapers.

[0024] 3. The present invention scrapes away impurities on the inner wall of the kettle body through the cooperation of the transmission shaft, the second scraper and the third scraper, while maintaining a certain thickness of impurities on the inner wall of the kettle body, which is convenient for subsequent cleaning and avoids the possibility of damage to the above two scrapers by impurities that are relatively compact and close to the inner wall of the kettle body.

[0025] 4. The present invention drives the transmission shaft to reverse through the motor output shaft, drives the second scraper to reverse and scrape the impurities on the inner wall of the kettle body, and while driving the one-way gear to reverse, the one-way gear drives the rotating drum and the third scraper and the fourth scraper evenly distributed on the rotating drum to rotate, cut and scrape the impurities on the inner wall of the kettle body, and reduce the damage of harder impurities to the second scraper.

[0026] 5. The present invention cuts and scrapes away impurities closer to the inner wall of the kettle body through the cooperation of the second scraper and the third scraper evenly distributed circumferentially. At the same time, the first U-shaped plate squeezes the two adjacent second U-shaped plates, so that the fourth scraper gradually extends toward the inner wall of the kettle body. The fourth scraper and the third scraper cut together to reduce the cutting spacing, thereby enhancing the cleaning effect of the second scraper on compacted impurities close to the inner wall of the kettle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 It is a three-dimensional structural schematic diagram of the transmission shaft and parts thereon of the present invention;

[0029] Figure 3 It is a schematic diagram of the three-dimensional structure of the extrusion plate, the first hydraulic telescopic rod and the first scraper of the present invention;

[0030] Figure 4 It is a three-dimensional structural schematic diagram of the first hydraulic telescopic rod, the second hydraulic telescopic rod and the scraper ring of the present invention;

[0031] Figure 5 It is a schematic diagram of the three-dimensional structure of the scraper ring and the first scraper of the present invention;

[0032] Figure 6 It is a schematic diagram of the three-dimensional structure of the first scraping component and the second scraping component of the present invention;

[0033] Figure 7 It is a schematic diagram of the three-dimensional structure of the connecting plate, the rotating member and the first fixed column of the present invention;

[0034] Figure 8 It is a three-dimensional structural schematic diagram of the cleaning component of the present invention;

[0035] Fig. 9 It is a three-dimensional structural schematic diagram of the elastic member, the slider and the cleaning plate of the present invention;

[0036] Fig.10 It is a schematic diagram of the three-dimensional structure of the cleaning ring and the extrusion block of the present invention;

[0037] Fig.11 It is a schematic diagram of the three-dimensional structure of the T-shaped block and the third hydraulic telescopic rod of the present invention;

[0038] Fig.12 It is a three-dimensional structural schematic diagram of the one-way transmission assembly of the present invention;

[0039] Fig.13 It is a schematic diagram of the three-dimensional structure of the adjustment component of the present invention;

[0040] Fig.14It is a schematic diagram of the three-dimensional structure of the connecting piece, the first U-shaped plate and the second U-shaped plate of the present invention.

[0041] Description of the accompanying drawings: 1, bracket, 2, kettle body, 3, transmission shaft, 4, stirring blade, 5, L-shaped frame, 6, electric telescopic rod, 7, N-shaped member, 8, rotating disk, 901, extrusion plate, 902, first hydraulic telescopic rod, 903, second hydraulic telescopic rod, 904, scraper ring, 905, first scraper, 906, limit block, 1001, connecting plate, 1002, sliding shell, 1003, second scraper, 1004, connecting member, 1005, fixed shaft, 1006, rotating member, 1007, first fixed column, 1008, first cover plate, 100 9. Rotating cylinder, 1010. Second cover plate, 1011. Third scraper, 1101. Guide shell, 1102. Elastic member, 1103. Sliding block, 1104. Cleaning plate, 1105. Second fixed column, 1106. Cleaning ring, 1201. One-way gear, 1202. Gear ring, 1203. Elastic telescopic rod, 1204. Extrusion block, 1301. Fixed plate, 1303. T-shaped block, 1304. Third hydraulic telescopic rod, 1305. Connecting member, 1306. First U-shaped plate, 1307. Second U-shaped plate, 1308. Fourth scraper. DETAILED DESCRIPTION

[0042] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0043] Example 1: A device for preparing dimethylthiotoluene diamine with a structure for removing impurities, please refer to Figure 1-Figure 5, including a bracket 1, a kettle body 2 is fixedly connected to the bracket 1, a feed port is arranged on the right part of the upper side of the kettle body 2, two discharge ports are symmetrically distributed on the lower side of the kettle body 2, one of which is provided with a filter screen (the filter screen is not shown in the figure), a motor is fixedly connected to the middle part of the bracket 1, a transmission shaft 3 is fixedly connected to the output shaft of the motor, the transmission shaft 3 is sealingly rotatably connected to the middle part of the lower side of the kettle body 2, two stirring blades 4 symmetrically distributed on the left and right are fixedly connected to the transmission shaft 3, an L-shaped frame 5 is fixedly connected to the left part of the upper side of the kettle body 2, an electric telescopic rod 6 is arranged on the L-shaped frame 5, the electric telescopic rod 6 is located at the extension of the axis of the kettle body 2, the telescopic end of the electric telescopic rod 6 is rotatably connected to an n-shaped part 7, the electric telescopic rod 6 is used to drive the n-shaped part 7 to move up and down, the kettle The middle part of the upper side of the body 2 is rotatably connected with a rotating disk 8, and the rotating disk 8 is fixedly connected to the upper side of the transmission shaft 3. The n-shaped member 7 is slidably matched with the rotating disk 8, and the n-shaped member 7 is driven by the rotating disk 8 to rotate. The lower part of the n-shaped member 7 is fixedly connected with an extrusion plate 901, and the extrusion plate 901 is slidably matched with the transmission shaft 3. Four springs distributed in a rectangular shape are arranged in the middle of the extrusion plate 901. The extrusion plate 901 is connected to two first scrapers 905 symmetrically distributed front and back through the four springs. The extrusion plate 901 is used to drive the first scraper 905 and its attached parts to move downward to scrape impurities on the side of the stirring blade 4. The first scraper 905 is composed of a rectangular plate in the middle and cleaning blocks on both sides. The back sides of the adjacent cleaning blocks of the two first scrapers 905 are both provided with The first scraper 905 has an arc surface, which is used to reduce the amount of impurities attached to its own surface when scraping impurities on the stirring blade 4. The upper side of the middle part of the two first scrapers 905 is fixedly connected to the first hydraulic telescopic rod 902, and the extrusion plate 901 is fixedly connected to the telescopic ends of the two first hydraulic telescopic rods 902. The left and right sides of the middle part of the two first scrapers 905 are fixedly connected to the second hydraulic telescopic rod 903. The fixed part of the second hydraulic telescopic rod 903 is connected to the fixed part of the adjacent first hydraulic telescopic rod 902 through a pipeline. The fixed part of the second hydraulic telescopic rod 903, the fixed part of the first hydraulic telescopic rod 902 and the pipeline therebetween are all filled with hydraulic oil. The telescopic ends of the second hydraulic telescopic rod 903 on the same side of the two first scrapers 905 are fixed together. A scraper ring 904 is connected. When the two first scrapers 905 are fully fitted with the two scraper rings 904, the diameter of the circle corresponding to the cylinder formed is equal to the diameter of the circle corresponding to the inner ring of the scraper ring 904. The scraper ring 904 and the two first scrapers 905 are slidably matched to scrape impurities on the upper side of the first scraper 905 and the stirring blade 4. Two limit blocks 906 symmetrically distributed front and back are fixedly connected to one side of the transmission shaft 3 close to the symmetrically distributed stirring blade 4. The two limit blocks 906 are respectively matched with the adjacent first scrapers 905 to limit the rectangular plate in the middle of the first scraper 905 when the first scraper 905 moves downward, so that the extrusion plate 901 can squeeze the telescopic ends of the two first hydraulic telescopic rods 902 to move downward.

[0044] When it is necessary to use the present device to produce dimethylthiotoluenediamine, the operator first adds the raw materials, catalyst and reaction liquid required for preparing dimethylthiotoluenediamine into the kettle body 2 through the feed port on the upper side of the kettle body 2. The "raw materials required for preparing dimethylthiotoluenediamine" will be referred to as "materials" hereinafter. The height of the added materials is less than the height of the first scraper 905. After the materials are added, the operator starts the motor installed in the middle of the bracket 1. The motor output shaft drives the transmission shaft 3 to rotate, and the transmission shaft 3 drives the two stirring blades 4 to rotate to stir the materials added to the kettle body 2.

[0045] During the stirring process of the stirring blade 4, the material, the catalyst and the reaction liquid react with each other to produce impurities. The impurities will adhere to the stirring blade 4 and affect the stirring effect of the stirring blade 4. As the amount of impurities attached increases, the cleaning effect of the stirring blade 4 will decrease. Therefore, it is necessary to clean the stirring blade 4 regularly. First, the staff starts the electric telescopic rod 6. The telescopic end of the electric telescopic rod 6 drives the n-shaped part 7 to move downward. The transmission shaft 3 drives the n-shaped part 7 to rotate through the rotating disk 8. The n-shaped part 7 drives the extrusion plate 901 to move downward. The extrusion plate 901 drives the symmetrically distributed first scraper 905 and the attached parts to move downward through the spring. The symmetrically distributed first scraper 905 has an arc surface arranged on the back side to reduce the amount of impurities attached to its surface when in the solution. When the first scraper 905 moves downward, the vertical surface of the first scraper 905 faces the adjacent The impurities on the vertical surface of the stirring blade 4 are scraped off. When the middle parts of the symmetrically distributed first scrapers 905 are in contact with the adjacent limit blocks 906 respectively, the vertical surface of the stirring blade 4 is cleaned. Then the extrusion plate 901 continues to move downward, squeezing the adjacent springs while driving the telescopic ends of the symmetrically distributed first hydraulic telescopic rods 902 to move downward, squeezing the liquid in the fixed part of the first hydraulic telescopic rod 902 into the fixed parts of the two adjacent second hydraulic telescopic rods 903, so that the telescopic ends of the second hydraulic telescopic rods 903 are extended, pushing the adjacent scraper rings 904 to slide along the two first scrapers 905, cleaning the surfaces of the two first scrapers 905 and the upper side surfaces of the adjacent stirring blades 4, realizing regular cleaning of the stirring blades 4 during operation, reducing the amount of impurities attached to the stirring blades 4, and restoring the stirring effect of the stirring blades 4.

[0046] After the cleaning of impurities on the stirring blade 4 is completed, the operator controls the telescopic part of the electric telescopic rod 6 to move upward, driving the n-shaped part 7 to move upward, and the n-shaped part 7 drives the extrusion plate 901 to move upward. The spring between the extrusion plate 901 and the first scraper 905 is gradually reset, and the extrusion plate 901 drives the telescopic ends of the symmetrically distributed first hydraulic telescopic rods 902 to move upward, and the liquid in the fixed parts of the two adjacent second hydraulic telescopic rods 903 is drawn back to the fixed part of the first hydraulic telescopic rod 902, so that the telescopic end of the second hydraulic telescopic rod 903 is retracted, and the telescopic end of the second hydraulic telescopic rod 903 drives the adjacent scraper ring 904 to slide along the two first scrapers 905 to complete the reset of the scraper ring 904. As the n-shaped part 7 continues to move upward, the extrusion plate 901 drives the two first scrapers 905 to move upward through the spring. When the n-shaped part 7 is driven to move upward to the initial position, the electric telescopic rod 6 is closed to complete the reset of the first scraper 905 and its accessories.

[0047] After completing the stirring of the material, the operator turns off the motor, first controls to open the discharge port with a filter on the lower side of the kettle body 2 to discharge the prepared solution, closes the discharge port after the solution is completely discharged, then adds clean liquid into the kettle body 2, and then opens the discharge port without a filter on the lower side of the kettle body 2 to discharge the impurities in the kettle body 2 along with the clean liquid, and after the clean liquid is discharged, closes the discharge port to complete the use of the device.

[0048] Example 2: Based on Example 1, please refer to Figure 6 and Figure 7 , also includes a first scraping component, the first scraping component is arranged on the transmission shaft 3, the scraping component is used to scrape the inner wall of the kettle body 2, the scraping component includes a connecting plate 1001, the connecting plate 1001 is fixedly connected to the transmission shaft 3, the connecting plate 1001 is located above the extrusion plate 901, a sliding shell 1002 is fixedly connected to the right side of the connecting plate 1001, and a second scraper 1003 is slidably connected in the sliding shell 1002. The second scraper 1003 is set to be L-shaped, and consists of a scraper with an isosceles trapezoidal cross-section and a cylindrical connecting piece. The cylindrical connecting piece slides in a sealed manner in the sliding shell 1002. A second scraping component for assisting in cleaning impurities on the inner wall of the kettle body 2 is arranged on the connecting plate 1001. The second scraping component is used to scrape impurities on the inner wall of the kettle body 2, and cooperates with the first scraping component to accelerate the efficiency of scraping impurities on the inner wall of the kettle body 2.

[0049] Please refer to Figure 6 and Figure 7The second scraping assembly includes a connecting member 1004, which is fixedly connected to the left side of the connecting plate 1001. The left side of the connecting member 1004 is sealed and rotatably connected to a fixed shaft 1005, and the fixed shaft 1005 is fixedly connected to a rotating member 1006. The rotating member 1006 consists of two discs and a plurality of cylinders uniformly distributed circumferentially therebetween, and the rotating member 1006 is located inside the connecting member 1004. The rotating member 1006 and the connecting member 1004 together constitute a sealed cavity. A first fixed column 1007 is fixedly connected to the lower side of the rotating member 1006. The first fixed column 1007 is sealed and rotatably connected to the connecting member 1004. The lower end of the first fixed column 1007 is fixedly connected to a first cover plate 1008, and the lower side of the first cover plate 1008 is fixedly connected to a rotating cylinder 1009, and the lower side of the rotating cylinder 1009 is fixedly connected to a second cover Plate 1010, the first cover plate 1008 and the second cover plate 1010 respectively seal the upper and lower sides of the rotating cylinder 1009, three third scrapers 1011 uniformly distributed in the circumference are slidably connected to the rotating cylinder 1009, and a one-way transmission component for limiting the rotation of the third scraper 1011 is jointly provided on the connecting piece 1004 and the fixed shaft 1005. The one-way transmission component is used to limit the rotation of the rotating cylinder 1009 during stirring, so that the relative position of the left third scraper 1011 and the connecting piece 1004 remains stable, and a cleaning component for cleaning the second scraper 1003 and the third scraper 1011 is provided on the extrusion plate 901. The cleaning component is used to maintain the scraping effect of the second scraper 1003 and the third scraper 1011, and an adjusting component for enhancing the cleaning effect on the inner wall of the kettle body 2 is provided on the rotating cylinder 1009.

[0050] Please refer to Figure 8-Figure 10The cleaning assembly includes a guide shell 1101, which is fixed to the right side of the extrusion plate 901. A slider 1103 is slidably connected in the guide shell 1101. An elastic member 1102 is provided in the guide shell 1101. The elastic member 1102 is set as a spring to drive the slider 1103 and the cleaning plate 1104 to reset. The two ends of the elastic member 1102 are respectively fixed to the extrusion plate 901 and the slider 1103. A cleaning plate 1104 is fixed to the right side of the slider 1103, wherein the cleaning plate 1104 is slidably matched with the second scraper 1003 to scrape off impurities attached to the second scraper 1003. The inner side surface of the cleaning plate 1104 and the other three sides of the second scraper 1003 except the rightmost vertical side surface The vertical side surfaces are all fitted together so that the cleaning plate 1104 will not touch the impurities adhered to the inner wall of the kettle body 2 when scraping the impurities attached to the second scraper 1003. A second fixed column 1105 is fixedly connected to the left side of the extrusion plate 901, and a cleaning ring 1106 is fixedly connected to the left side of the second fixed column 1105. The cleaning ring 1106 is slidably matched with three third scrapers 1011 evenly distributed circumferentially, and the cleaning ring 1106 is slidably matched with the rotating cylinder 1009 to scrape off the impurities attached to the third scraper 1011 and the rotating cylinder 1009. A notch is provided on the leftmost side of the cleaning ring 1106 to prevent the impurities adhered to the inner wall of the kettle body 2 from being touched when scraping the impurities on the third scraper 1011.

[0051] Please refer to Figure 10-12 The one-way transmission assembly includes a one-way gear 1201, which is installed on the fixed shaft 1005. The one-way gear 1201 will not drive the fixed shaft 1005 to rotate during stirring. When the transmission shaft 3 drives the one-way gear 1201 to reverse, it drives the fixed shaft 1005 to rotate. A gear ring 1202 is fixedly connected to the upper part of the inner wall of the kettle body 2. The one-way gear 1201 rotates and meshes with the gear ring 1202. Three elastic telescopic rods 1203 evenly distributed in the circumferential direction are fixedly connected to the lower side of the connecting member 1004. Three extrusion blocks 1204 evenly distributed in the circumferential direction are fixedly connected to the upper side of the first cover plate 1008. The cross-section of the extrusion block 1204 is a right angle. The elastic telescopic rod 1203 is in the shape of a triangle, and one of the right-angled sides is in contact with the upper side of the first cover plate 1008 to limit the telescopic portion of the elastic telescopic rod 1203. The surface corresponding to the hypotenuse of the extrusion block 1204 is an inclined curved surface, which is used to contact and squeeze the telescopic end of the elastic telescopic rod 1203 during rotation. The elastic telescopic rod 1203 and the extrusion block 1204 are extruded and matched to limit the rotation of the rotating drum 1009 during stirring, so that the relative position of the left third scraper 1011 and the connecting member 1004 remains stable. During reversal, the telescopic end of the elastic telescopic rod 1203 is squeezed and moved upward by the inclined curved surface of the extrusion block 1204, thereby releasing the limit on the extrusion block 1204.

[0052] Please refer to Fig.11 , Fig.13 and Fig.14The adjustment component includes two fixed plates 1301 symmetrically distributed front and back, and the two fixed plates 1301 are fixed to the lower side of the n-shaped member 7. The front and rear sides of the connecting plate 1001 are fixed with T-shaped blocks 1303, and the T-shaped blocks 1303 are slidably matched with the n-shaped member 7. The rear T-shaped block 1303 is fixed with two third hydraulic telescopic rods 1304 symmetrically distributed left and right. A spring is arranged in the third hydraulic telescopic rod 1304, which is used to drive the telescopic end of the third hydraulic telescopic rod 1304 to reset when the fixed plate 1301 releases the squeezing of the telescopic end of the third hydraulic telescopic rod 1304. The telescopic ends of the two third hydraulic telescopic rods 1304 are squeezed and matched with the rear fixed plate 1301. The rotating cylinder 1009 is slidably connected with three fourth scrapers evenly distributed in the circumferential direction. 1308, the fourth scraper 1308 is slidably matched with the cleaning ring 1106, so that the cleaning ring 1106 scrapes impurities on the surface of the fourth scraper 1308, the three fourth scrapers 1308 are arranged at intervals with the three third scrapers 1011, the upper and lower sides of the three fourth scrapers 1308 are fixedly connected with the first U-shaped plate 1306, the upper and lower sides of the rotating cylinder 1009 are fixedly connected with the connecting piece 1305, and the upper and lower connecting pieces 1305 are slidably connected with three connecting rods evenly distributed in the circumferential direction, the six first U-shaped plates 1306 are respectively fixedly connected with the adjacent connecting rods of the adjacent connecting pieces 1305, so that the connecting rods of the connecting piece 1305 drive the adjacent first U-shaped plates 1306 to move outward, and the upper and lower sides of the third scraper 1011 are fixedly connected with the second U-shaped plate 1 307, the second U-shaped plate 1307 is squeezed and matched with the two adjacent first U-shaped plates 1306, a spring is fixedly connected between the second U-shaped plate 1307 and the rotating cylinder 1009, which is used to drive the second U-shaped plate 1307 to reset, the connecting piece 1004 is provided with a first cavity, the connecting piece 1004 and the first cavity of the fixed part of the left third hydraulic telescopic rod 1304 are communicated through a pipeline, the first cavity of the connecting piece 1004, the fixed part of the left third hydraulic telescopic rod 1304 and the pipeline are all provided with hydraulic oil, the middle part of the rotating piece 1006 is provided with a second cavity formed by contact and cooperation with the connecting piece 1004, the second cavity of the rotating piece 1006 is communicated with the first cavity of the connecting piece 1004, the first fixed column 1007 is provided with a third cavity, and the first fixed The third cavity of the column 1007 is connected with the second cavity of the rotating member 1006, the third cavity of the first fixed column 1007 is connected with the connecting pieces 1305 on the upper and lower sides of the rotating cylinder 1009, the first cavity of 1004, the second cavity of the rotating member 1006, the third cavity of the first fixed column 1007 and the two connecting pieces 1305 are all filled with hydraulic oil, the sliding shell 1002 is provided with a fourth cavity, the fourth cavity of the sliding shell 1002 is connected with the fixed part of the adjacent third hydraulic telescopic rod 1304 through a pipeline, the fourth cavity of the sliding shell 1002, the fixed part of the third hydraulic telescopic rod 1304 and the pipeline are all filled with hydraulic oil, the cross-sectional area of ​​the first cavity of the connecting piece 1004 is smaller than the cross-sectional area of ​​the fourth cavity of the sliding shell 1002,It is used to control the extension speed of the third scraper 1011 and the fourth scraper 1308 to be faster than the extension speed of the second scraper 1003, so that the third scraper 1011 and the fourth scraper 1308 pre-treat the impurities adhering to the inner wall of the kettle body 2, which is convenient for the second scraper 1003 to scrape off the impurities adhering to the inner wall of the kettle body 2.

[0053] When the transmission shaft 3 drives the two stirring blades 4 to stir, the impurities generated by the mutual reaction of the materials, the catalyst and the reaction liquid will also adhere to the inner wall of the kettle body 2, and the motor output shaft drives the transmission shaft 3 to rotate, and the transmission shaft 3 drives the sliding shell 1002 to rotate through the connecting plate 1001, and the sliding shell 1002 drives the second scraper 1003 to rotate, so as to scrape off the impurities attached to the inner wall of the kettle body 2. The second scraper 1003 is spaced a certain distance from the inner wall of the kettle body 2 to keep the impurities on the inner wall of the kettle body 2 at a certain thickness, protect the second scraper 1003, and facilitate the subsequent cleaning of the inner wall of the kettle body 2. When the connecting plate 1001 rotates, the connecting plate 1001 also drives the connecting piece 1004 to rotate, and the connecting piece 1004 is fixed The shaft 1005 drives the one-way gear 1201 to mesh and rotate with the gear ring 1202. At this time, the one-way gear 1201 will not drive the fixed shaft 1005 to rotate. During stirring, the vertical surface of the extrusion block 1204 is restricted in movement by the telescopic portion of the adjacent elastic telescopic rod 1203, so that the relative position of the first cover plate 1008 and its accessories and the connecting member 1004 remains stable. The third scraper 1011 on the far left of the rotating cylinder 1009 scrapes off impurities attached to the inner wall of the kettle body 2. The distance between the third scraper 1011 on the far left of the rotating cylinder 1009 and the inner wall of the kettle body 2 is equal to the distance between the second scraper 1003 and the inner wall of the kettle body 2, so as to ensure the thickness of the impurities on the inner wall of the kettle body 2, which is convenient for the subsequent cleaning of the inner wall of the kettle body 2.

[0054] When the n-shaped member 7 drives the extrusion plate 901 to move downward, the extrusion plate 901 drives the guide shell 1101 to move downward, and the guide shell 1101 drives the cleaning plate 1104 to slide downward through the slider 1103 to scrape off the impurities attached to the second scraper 1003. At the same time, the guide shell 1101 drives the cleaning ring 1106 to slide downward through the second fixed column 1105 to clean the impurities on the third scraper 1011, the fourth scraper 1308 and the rotating cylinder 1009, so as to reduce the amount of impurities attached to the second scraper 1003, the third scraper 1011, the fourth scraper 1308 and the rotating cylinder 1009, and restore the scraping effect of the third scraper 1011 and the second scraper 1003 on the left side.

[0055] When the solution is stirred well, the operator discharges the stirred solution through the discharge port equipped with a filter, and then the operator controls the output shaft of the motor to drive the transmission shaft 3 to reverse, the transmission shaft 3 drives the sliding shell 1002 to reverse through the connecting plate 1001, the sliding shell 1002 drives the second scraper 1003 to reverse, and at the same time the transmission shaft 3 drives the connecting member 1004 to reverse through the connecting plate 1001, so that the connecting member 1004 drives the one-way gear 1201 to mesh with the gear ring 1202 through the fixed shaft 1005, so that the one-way gear 1201 rotates, the one-way gear 1201 drives the fixed shaft 1005 to rotate, the fixed shaft 1005 drives the rotating member 1006 to rotate, the rotating member 1006 drives the first fixed column 1007 to rotate, the first fixed column 1007 drives the first cover plate 1008 to rotate, and the first cover plate 1008 drives The three extrusion blocks 1204 thereon rotate, and the inclined surface of the extrusion block 1204 squeezes the telescopic part of the adjacent elastic telescopic rod 1203 to move upward, thereby releasing the limit of the extrusion block 1204 by the elastic telescopic rod 1203. After the inclined surface passes through the telescopic part of the adjacent elastic telescopic rod 1203, the telescopic part of the adjacent elastic telescopic rod 1203 pops out, and the above actions are repeated to ensure the normal rotation of the first cover plate 1008. The first cover plate 1008 drives the rotating cylinder 1009 and the attached parts to rotate. At the same time, the connecting member 1004 drives the rotating cylinder 1009 and the attached parts to rotate in the opposite direction through the rotating member 1006, so that the third scraper 1011 rotates in the opposite direction and rotates around the axis of the rotating cylinder 1009 at the same time, thereby cutting impurities attached to the inner wall of the kettle body 2, and assisting in strengthening the cleaning effect of the impurities on the inner wall of the kettle body 2 when the second scraper 1003 is reversed.

[0056] When the electric telescopic rod 6 is in the initial position of the n-shaped member 7, the telescopic portion of the electric telescopic rod 6 is in a partially extended state. When the output shaft of the motor drives the transmission shaft 3 to reverse, the operator controls the telescopic end of the electric telescopic rod 6 to move upward, and the telescopic end of the electric telescopic rod 6 drives the n-shaped member 7 to move upward. The upward movement of the n-shaped member 7 drives the symmetrically distributed fixing plates 1301 to move upward, and the rear fixing plates 1301 drive the telescopic ends of the two third hydraulic telescopic rods 1304 to move upward, and the springs in the two third hydraulic telescopic rods 1304 are compressed. Then, the liquid in the fixed parts of the two third hydraulic telescopic rods 1304 is squeezed into the fourth cavity of the sliding shell 1002 and the first cavity of the connecting piece 1004 through the pipeline respectively. The liquid in the fourth cavity of the sliding shell 1002 squeezes the second scraper 1003 to slide toward the inner wall of the kettle body 2. The liquid in the first cavity of the connecting piece 1004 squeezes the second cavity of the rotating piece 1006 and the third cavity of the first fixed column 1007 to make the connecting rods of the upper and lower connecting pieces 1305 extend and drive the two sets of first U-shaped plates 1003 evenly distributed in the circumferential direction. 306 slides in a direction away from the axis of the rotating cylinder 1009. Taking the extrusion of one of the first U-shaped plates 1306 as an example, the first U-shaped plate 1306 slides and squeezes the two second U-shaped plates 1307 adjacent to it. The two second U-shaped plates 1307 squeeze the adjacent springs respectively and slide in a direction away from the axis of the rotating cylinder 1009. The sliding of the second U-shaped plate 1307 drives the adjacent third scraper 1011 to extend outward. When the n-shaped member 7 drives the extrusion plate 901 to move upward and contact the connecting plate 1001, the operator closes the electric telescopic rod 6. At this time, The extension lengths of the second scraper 1003, the third scraper 1011 and the fourth scraper 1308 all reach the maximum, so that when the telescopic end of the electric telescopic rod 6 moves upward, the second scraper 1003 and the third scraper 1011 first gradually extend outward to scrape off the impurities on the inner wall of the kettle body 2 layer by layer. When the telescopic end of the electric telescopic rod 6 moves upward to a certain distance, the fourth scraper 1308 cuts the impurities on the inner wall of the kettle body 2, reducing the cutting interval to enhance the cleaning effect of the second scraper 1003 on the compacted impurities close to the inner wall of the kettle body 2.

[0057] After the cleaning of the inner wall of the kettle body 2 is completed, the operator controls the telescopic end of the electric telescopic rod 6 to drive the n-shaped member 7 to move downward, and the n-shaped member 7 drives the symmetrically distributed fixed plate 1301 to move downward, and the rear fixed plate 1301 moves downward, releasing the limit on the telescopic end of the third hydraulic telescopic rod 1304. The telescopic end of the third hydraulic telescopic rod 1304 moves downward under the action of its own spring force, and the liquid in the two symmetrically distributed connecting pieces 1305 is pumped back to the fixed part of the third hydraulic telescopic rod 1304 on the left, and the connecting rod of the connecting piece 1305 is retracted, driving the fourth scraper 13 08 reset, the fourth scraper 1308 resets to release the squeezing of the third scraper 1011, and the third scraper 1011 is reset under the drive of the spring, and at the same time, the liquid in the sliding shell 1002 is pumped back into the fixed part of the third hydraulic telescopic rod 1304 on the right, driving the second scraper 1003 to reset, and when the n-shaped part 7 moves to the initial position, the telescopic end of the electric telescopic rod 6 is closed to complete the reset of the device. At this time, the cleaning of the inner wall of the kettle body 2 of the device is completed, and then the motor is turned off, cleaning liquid is added and the cleaning port without a filter is opened, and the impurities are discharged with the liquid, and then the cleaning port is closed.

[0058] Example 3: Based on Example 2, please refer to Figure 1-Figure 14 The method for preparing dimethylthiotoluenediamine uses a dimethylthiotoluenediamine preparation device with an impurity removal structure, and comprises the following steps:

[0059] S1: adding the raw material of dimethylthiotoluenediamine into the kettle 2, so that the raw material of dimethylthiotoluenediamine, the catalyst and the reaction liquid reach the required liquid level for working;

[0060] S2: Start the motor, the output shaft of the motor drives the transmission shaft 3 and the stirring blade 4 to rotate, stirring the raw materials in the kettle body 2, and at the same time the transmission shaft 3 drives the second scraper 1003 and the third scraper 1011 on the leftmost side to rotate, scraping off the impurities adhering to the inner wall of the kettle body 2, thereby reducing the amount of impurities adhering to the inner wall of the kettle body 2;

[0061] S3: Start the telescopic end of the electric telescopic rod 6 to move downward, the first scraper 905 moves downward to scrape off the impurities attached to the side of the stirring blade 4, the scraper ring 904 scrapes off the impurities on the surface of the first scraper 905 and the upper side of the stirring blade 4, the cleaning plate 1104 and the cleaning ring 1106 move downward, the second scraper 1003, the third scraper 1011 rotate, the fourth scraper 1308 and the surface of the rotating cylinder 1009 are scraped off, and then the telescopic end of the electric telescopic rod 6 is controlled to move upward and reset, and the above operation process is repeated for regular cleaning;

[0062] S4: After the dimethylthiotoluenediamine solution is prepared, the solution is discharged through a filter mesh port to separate it from impurities;

[0063] S5: The output shaft of the control motor drives the transmission shaft 3 to rotate in the opposite direction, the third scraper 1011 rotates to cut the impurities on the inner wall of the kettle body 2, and the second scraper 1003 scrapes the impurities on the inner wall of the kettle body 2;

[0064] S6: Control the telescopic end of the electric telescopic rod 6 to move upward to the specified position and then stop, the third scraper 1011 and the fourth scraper 1308 gradually move outward to cut the impurities on the inner wall of the kettle body 2, which is conducive to the second scraper 1003 gradually moving outward to scrape away the impurities close to the inner wall of the kettle body 2, and then control the telescopic end of the electric telescopic rod 6 to move downward and reset;

[0065] S7: After the cleaning is completed, the motor is turned off, the above-mentioned parts are reset one after another, cleaning liquid is added into the kettle body 2, and impurities are discharged from the non-filter port.

[0066] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A dimethylthiotoluenediamine preparation device with an impurity removal structure, characterized in that: The invention comprises a support (1), a kettle body (2) is fixedly connected to the support (1), the kettle body (2) is provided with a feed port and two discharge ports, a motor is fixedly connected to the support (1), the output shaft of the motor is fixedly connected to a transmission shaft (3) rotatably connected to the kettle body (2), the transmission shaft (3) is fixedly connected to symmetrically distributed stirring blades (4), an L-shaped frame (5) is fixedly connected to the upper side of the kettle body (2), an electric telescopic rod (6) is provided on the L-shaped frame (5), the telescopic end of the electric telescopic rod (6) is rotatably connected to an n-shaped member (7), the upper side of the kettle body (2) is rotatably connected to a rotating disk (8) slidably connected to the n-shaped member (7), the rotating disk (8) is fixedly connected to the upper side of the transmission shaft (3), the lower part of the n-shaped member (7) is fixedly connected to an extrusion plate (901) slidably matched with the transmission shaft (3), the extrusion plate (901) ) is connected to a symmetrically distributed first scraper (905) through a spring, the first scraper (905) is fixedly connected to a first hydraulic telescopic rod (902) and a symmetrically distributed second hydraulic telescopic rod (903), the extrusion plate (901) is fixedly connected to the telescopic end of the first hydraulic telescopic rod (902), the fixed portion of the second hydraulic telescopic rod (903) is connected to the fixed portion of the adjacent first hydraulic telescopic rod (902) through a pipeline, the telescopic ends of the second hydraulic telescopic rods (903) located on the same side of different first scrapers (905) are commonly fixedly connected to a scraper ring (904) that is slidably matched with the symmetrically distributed first scrapers (905), and the transmission shaft (3) is fixedly connected to a side close to the symmetrically distributed stirring blades (4) with symmetrically distributed limit blocks (906) that are respectively limited and matched with the adjacent first scrapers (905); The invention also comprises a first scraping assembly, the first scraping assembly being arranged on the transmission shaft (3), the first scraping assembly being used to scrape the inner wall of the kettle body (2), the first scraping assembly comprising a connecting plate (1001), the connecting plate (1001) being fixedly connected to the transmission shaft (3), the connecting plate (1001) being fixedly connected to a sliding shell (1002), a second scraping plate (1003) being slidably connected inside the sliding shell (1002), and the connecting plate (1001) being provided with a second scraping assembly for assisting in cleaning impurities on the inner wall of the kettle body (2); The second scraping assembly comprises a connecting member (1004), the connecting member (1004) being fixedly connected to a side of the connecting plate (1001) away from the sliding shell (1002), the side of the connecting member (1004) away from the connecting plate (1001) being rotatably connected to a fixed shaft (1005), the fixed shaft (1005) being fixedly connected to a rotating member (1006), and the rotating member (1006) being located inside the connecting member (1004), the lower side of the rotating member (1006) being fixedly connected to a first fixed column (1007), the first fixed column (1007) being rotatably connected to the connecting member (1004), and the lower end of the first fixed column (1007) being fixedly connected to a first cover plate (1008), a rotating cylinder (1009) is fixedly connected to the lower side of the first cover plate (1008), a second cover plate (1010) is fixedly connected to the lower side of the rotating cylinder (1009), a third scraper (1011) uniformly distributed in the circumferential direction is slidably connected to the rotating cylinder (1009), a one-way transmission component for limiting the rotation of the third scraper (1011) is jointly provided on the connecting member (1004) and the fixed shaft (1005), a cleaning component for cleaning the second scraper (1003) and the third scraper (1011) is provided on the extrusion plate (901), and an adjustment component for enhancing the cleaning effect on the inner wall of the kettle body (2) is provided on the rotating cylinder (1009); The cleaning assembly comprises a guide shell (1101), the guide shell (1101) being fixedly connected to the extrusion plate (901), a slider (1103) being slidably connected inside the guide shell (1101), an elastic member (1102) being arranged inside the guide shell (1101), two ends of the elastic member (1102) being respectively fixedly connected to the extrusion plate (901) and the slider (1103), one end of the slider (1103) away from the extrusion plate (901) being fixedly connected to the cleaning plate (1104), A second fixing column (1105) is fixedly connected to one side of the extrusion plate (901) away from the guide shell (1101), and a cleaning ring (1106) is fixedly connected to one end of the second fixing column (1105) away from the extrusion plate (901), wherein the cleaning plate (1104) is slidably matched with the second scraper (1003), the cleaning ring (1106) is slidably matched with the third scrapers (1011) uniformly distributed in the circumferential direction, and the cleaning ring (1106) is slidably matched with the rotating cylinder (1009); The adjustment assembly comprises symmetrically distributed fixing plates (1301), the symmetrically distributed fixing plates (1301) are all fixedly connected to the lower side of the n-shaped member (7), both sides of the connecting plate (1001) are fixedly connected with T-shaped blocks (1303), the T-shaped blocks (1303) are slidably matched with the n-shaped member (7), one of the T-shaped blocks (1303) is fixedly connected with a symmetrically distributed third hydraulic telescopic rod (1304), a spring is arranged inside the third hydraulic telescopic rod (1304), and the telescopic ends of the symmetrically distributed third hydraulic telescopic rods (1304) are squeezed and matched with the adjacent fixing plates (1301). The rotating cylinder (1009) is slidably connected to a fourth scraper (1308) evenly distributed in the circumference, the fourth scraper (1308) is slidably matched with the cleaning ring (1106), the fourth scraper (1308) evenly distributed in the circumference is arranged at intervals with the third scraper (1011) evenly distributed in the circumference, both sides of the fourth scraper (1308) evenly distributed in the circumference are fixedly connected to the first U-shaped plate (1306), both sides of the rotating cylinder (1009) are fixedly connected to a connecting piece (1305), the connecting piece (1305) is slidably connected to a connecting rod evenly distributed in the circumference, and the first U-shaped The plates (1306) are respectively fixedly connected to adjacent connecting rods of the adjacent connecting member (1305), and second U-shaped plates (1307) are fixedly connected to both sides of the third scraper (1011), and the second U-shaped plate (1307) is squeezed and matched with the adjacent first U-shaped plate (1306), and a spring is fixedly connected between the second U-shaped plate (1307) and the rotating cylinder (1009), and the connecting member (1004) is provided with a first cavity, and the connecting member (1004) and the first cavity of the fixed part of the adjacent third hydraulic telescopic rod (1304) are connected through a pipeline, and the middle part of the rotating member (1006) is provided with a first cavity. The first fixed column (1007) is provided with a third cavity, and the third cavity of the first fixed column (1007) is connected to the second cavity of the rotating component (1006). The third cavity of the first fixed column (1007) is connected to the connecting components (1305) on both sides of the rotating cylinder (1009). The sliding shell (1002) is provided with a fourth cavity, and the fourth cavity of the sliding shell (1002) is connected to the fixing part of the adjacent third hydraulic telescopic rod (1304) through a pipeline.

2. The dimethylthiotoluenediamine preparation device with an impurity removal structure according to claim 1, characterized in that: The back side of the first scraper (905) is symmetrically distributed and is provided with a symmetrically distributed arc surface, so as to reduce the adhesion of impurities on the surface of the first scraper (905).

3. The dimethylthiotoluenediamine preparation device with an impurity removal structure according to claim 2, characterized in that: The one-way transmission assembly comprises a one-way gear (1201), the one-way gear (1201) being mounted on the fixed shaft (1005), a gear ring (1202) being fixedly connected to the inner wall of the kettle body (2), the one-way gear (1201) being rotated to mesh with the gear ring (1202), an elastic telescopic rod (1203) being fixedly connected to the lower side of the connecting member (1004), an extrusion block (1204) being fixedly connected to the upper side of the first cover plate (1008), the elastic telescopic rod (1203) being extruded and matched with the extrusion block (1204).

4. The dimethylthiotoluenediamine preparation device with an impurity removal structure according to claim 3, characterized in that: The cross section of the extrusion block (1204) is a right triangle, and one of the right-angled sides is in contact with the upper side of the first cover plate (1008) to limit the telescopic portion of the elastic telescopic rod (1203).

5. The dimethylthiotoluenediamine preparation device with an impurity removal structure according to claim 4, characterized in that: The cross-sectional area of ​​the fourth cavity of the sliding shell (1002) is greater than the cross-sectional area of ​​the first cavity of the connecting member (1004), so as to control the extension speed of the second scraper (1003) and the fourth scraper (1308).

6. A method for preparing dimethylthiotoluenediamine, characterized in that: The dimethylthiotoluenediamine preparation device with an impurity removal structure according to claim 5 comprises the following steps: S1: adding the raw material of dimethylthiotoluenediamine into the kettle body (2) so that the raw material of dimethylthiotoluenediamine, the catalyst and the reaction liquid reach the required liquid level for working; S2: starting the motor, the output shaft of the motor drives the transmission shaft (3) and the stirring blade (4) to rotate, stirring the raw materials in the kettle body (2), and at the same time the transmission shaft (3) drives the second scraper (1003) and the third scraper (1011) on the far left to rotate, scraping off impurities adhering to the inner wall of the kettle body (2), thereby reducing the amount of impurities adhering to the inner wall of the kettle body (2); S3: The telescopic end of the electric telescopic rod (6) is started to move downward, the first scraper (905) moves downward to scrape off impurities attached to the side of the stirring blade (4), the scraper ring (904) scrapes off impurities on the surface of the first scraper (905) and the upper side of the stirring blade (4), the cleaning plate (1104) and the cleaning ring (1106) move downward, the second scraper (1003), the third scraper (1011) rotate, the fourth scraper (1308) and the surface of the rotating cylinder (1009) are scraped off impurities, and then the telescopic end of the electric telescopic rod (6) is controlled to move upward and reset, and the above operation process is repeated for regular cleaning; S4: After the dimethylthiotoluenediamine solution is prepared, the solution is discharged through a filter mesh port to separate it from impurities; S5: Controlling the output shaft of the motor to drive the transmission shaft (3) to rotate in the opposite direction, so that the third scraper (1011) rotates to cut impurities on the inner wall of the kettle body (2), and the second scraper (1003) scrapes impurities on the inner wall of the kettle body (2); S6: Controlling the telescopic end of the electric telescopic rod (6) to move upward to a designated position and then stop, the third scraper (1011) and the fourth scraper (1308) gradually move outward to cut the impurities on the inner wall of the kettle body (2), which is conducive to the second scraper (1003) gradually moving outward to scrape away the impurities close to the inner wall of the kettle body (2), and then controlling the telescopic end of the electric telescopic rod (6) to move downward to reset; S7: After the cleaning is completed, the motor is turned off, the above-mentioned parts are reset one after another, cleaning liquid is added into the kettle body (2), and impurities are discharged from the non-filter port.

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