Rotary mixer

Abstract

The utility model discloses a rotary mixer which comprises a stirring barrel and a rotating shaft, a stirring component is arranged on the outer side of the rotating shaft, and the rotating shaft and the stirring component are positioned in the stirring barrel; one end of the stirring barrel body is a discharging end, and one end, far away from the discharging end, of the stirring barrel body is sequentially connected with a main material feeding disc and a mechanical sealing device in a sealing manner; the main material feeding disc is provided with a main material feeding port which is through from outside to inside, the main material feeding disc is arranged outside the rotating shaft in a sleeving mode, and a main material feeding channel is formed between the main material feeding disc and the rotating shaft. And the mechanical sealing device is hermetically sleeved outside the rotating shaft. According to the scheme, the sealing performance of the structure is well guaranteed, the service life of a mechanical structure can be effectively prolonged, the working effect of the rotary mixer is guaranteed, overhaul and maintenance are facilitated, the problems that a rotary mixer in the prior art is poor in effect and low in precision are solved, the slurry input, mixing and output processes are more accurate and stable, and the production efficiency is improved. And the consistency and controllability of the process are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of mixers, and in particular relates to a rotary mixer. Background Art

[0002] At present, in the production equipment of some high-end resin films (such as polyimide films), a rotary mixer is needed to evenly mix the high-viscosity main material (such as polyamic acid resin) and auxiliary materials (such as imidization reagent) in a short time, and then output them from the discharge end of the rotary mixer. The rotary mixer achieves the mixing effect by rotating the stirring parts through a central axis, so the central axis is required to have good concentricity, sealing and operation stability; at the same time, the temperature in the mixer also needs to be precisely controlled. Conventional rotary mixers are difficult to meet the current process requirements of high-end resin films. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a rotary mixer to solve the problems of poor effect and low precision of the rotary mixer in the prior art, so as to make the slurry input, mixing and output processes more accurate and stable, and ensure the consistency and controllability of the process.

[0004] According to the technical scheme of the utility model, the utility model provides a rotary mixer, including a mixing drum and a rotating shaft, a mixing component is provided on the outer side of the rotating shaft, and the rotating shaft and the mixing component are located in the mixing drum; one end of the mixing drum is a discharging end, and a main material feeding disk and a mechanical sealing device are sealed and connected in sequence at the end of the mixing drum away from the discharging end; the main material feeding disk has a main material feeding port that runs from the outside to the inside, the main material feeding disk is sleeved outside the rotating shaft and a main material feeding channel is formed between the main material feeding disk and the rotating shaft; the mechanical sealing device is sealingly sleeved outside the rotating shaft; the mixing component includes protruding teeth on the outer side of the rotating shaft, or the inner side of the mixing drum has protruding teeth, or both the outer side of the rotating shaft and the inner side of the mixing drum have protruding teeth and the positions are staggered.

[0005] Furthermore, it also includes a mounting plate, and the main material feeding tray or the mixing cylinder or the mechanical sealing device is fixedly connected to the mounting plate through a fixed bracket; a limit bearing is provided on the mounting plate and / or the fixed bracket, and the limit bearing sleeve is arranged outside the rotating shaft.

[0006] Furthermore, it also includes a motor, which is connected to the rotating shaft through a synchronous pulley assembly; the motor and the mixing drum are located on the same side of the mounting plate, and the synchronous pulley assembly is located on the other side of the mounting plate; the synchronous pulley assembly includes a driving pulley and a driven pulley, and the driving pulley and the driven pulley are connected to the synchronous belt, the driving pulley is drivingly connected to the output end of the motor, and the driven pulley is coaxially arranged with the rotating shaft.

[0007] Furthermore, a speed reducer is fixedly mounted on the mounting plate, and the motor is drivingly connected to the driving pulley via the speed reducer.

[0008] Furthermore, an auxiliary material nozzle is provided on the mixing cylinder, the auxiliary material nozzle penetrates the side wall of the mixing cylinder in a sealed manner, and a check structure is provided inside the auxiliary material nozzle.

[0009] Furthermore, the auxiliary material nozzle includes a tubular nozzle valve body and a sealing connection sleeve, the sealing connection sleeve is sealingly connected to the mixing drum, and the nozzle valve body is sealingly connected in the sealing connection sleeve; a check valve sealing screw is arranged in the nozzle valve body; one end of the check valve sealing screw is a conical screw head and is located close to the output end of the nozzle valve body, and the inside of the nozzle valve body has a conical inner wall whose shape matches the screw head; the other end of the check valve sealing screw is sleeved with a check valve cross nut, and the check valve cross nut is connected to or contacts the inner wall of the nozzle valve body through a check spring.

[0010] Furthermore, the mechanical sealing device includes a rotating shaft positioning sleeve, which is mounted on the rotating shaft, and a first sealing ring is sandwiched between the rotating shaft positioning sleeve and the rotating shaft; in the direction pointing to the discharge end, an elastic top tightening member, a stationary sealing ring and a rotating sealing ring are sequentially mounted on the outside of the rotating shaft positioning sleeve; a second sealing ring is sandwiched between the rotating sealing ring and the rotating shaft positioning sleeve; the stationary sealing ring and the rotating sealing ring are in contact with each other and sealed; a secondary sealing ring and a mechanical sealing body are sequentially mounted on the outside of the stationary sealing ring, a third sealing ring is sandwiched between the secondary sealing ring and the stationary sealing ring, and a fourth sealing ring is sandwiched between the mechanical sealing body and the secondary sealing ring; the mechanical sealing body is provided with a lubricant inlet which runs from the outside to the inside, and the lubricant inlet is connected to the part in contact between the stationary sealing ring and the rotating sealing ring.

[0011] Furthermore, a centering clamp is provided at one end of the mechanical seal body away from the discharge end; a centering locking ring is also provided on the outside of the rotating shaft positioning sleeve; the centering clamp and the centering locking ring are provided with through screw mounting holes and are installed with centering screws; the centering locking ring and the rotating shaft positioning sleeve are provided with through top screw mounting holes and are installed with positioning top screws, and there are multiple positioning top screws distributed in the circumferential direction.

[0012] Furthermore, the positioning screw includes a sleeve positioning screw and a shaft positioning screw; the inner end of the shaft positioning screw penetrates the rotating shaft positioning sleeve and contacts the rotating shaft.

[0013] Furthermore, the mixing drum has a constant temperature chamber and a temperature measuring device near the discharge end, and the temperature measuring device is connected to the temperature control system of the constant temperature chamber; the temperature measuring device is arranged inside the side wall of the mixing drum, and the temperature measuring end of the temperature measuring device is close to the inside of the mixing drum but does not penetrate the side wall of the mixing drum on the inside; and / or, the outside of the mixing drum has a cooling channel.

[0014] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0015] 1. The rotary mixer of the utility model adopts a main material feeding disc as the feeding port, and the feeding disc is a disc-shaped component used for feeding, so it is convenient to be stably sealed and installed with adjacent components through a flange connection; and a mechanical sealing device is used to seal one end of the main material feeding disc, so that the feeding material enters the mixing cylinder, but does not enter the area at the front end of the rotating shaft for realizing transmission, positioning and other functions; in this way, the sealing of the structure is ensured, the service life of the mechanical structure can be effectively extended, the working effect of the rotary mixer is ensured, and it is convenient for inspection and maintenance.

[0016] 2. The rotary mixer of the utility model optimizes the overall transmission structure of the rotary mixer, and improves the traditional direct connection between the motor and the rotating shaft to a transmission connection through a synchronous pulley assembly, which fundamentally avoids the risk of materials in the mixer entering the motor, and helps to make the rotation of the rotating shaft and the stirring parts more stable, and provides a buffering effect to avoid the situation where the structure is damaged under the large driving force of the motor when, for example, the stirring part fails and gets stuck. At the same time, it can optimize the overall layout and help improve space utilization.

[0017] 3. The rotary mixer of the utility model is also optimized in terms of the mechanical sealing device, the auxiliary material nozzle and the mixing barrel, so as to achieve better sealing effect and temperature control effect, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall cross-sectional structure according to an embodiment of the utility model.

[0019] Figure 2a-2c It is a schematic diagram of the partial cross-sectional structure of the stirring component part according to some embodiments of the utility model.

[0020] Figure 3 It is a schematic cross-sectional structure diagram of an auxiliary material nozzle according to a preferred embodiment of the utility model.

[0021] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure along the AA plane.

[0022] Figure 5 It is a schematic cross-sectional view of a mechanical sealing device according to a preferred embodiment of the utility model.

[0023] Figure 6 yes Figure 5 A schematic diagram of the axial perspective structure of the mechanical sealing device shown.

[0024] Figure 7 yes Figure 5A schematic diagram of the three-dimensional structure of the mechanical sealing device shown.

[0025] Description of reference numerals in the accompanying drawings:

[0026] 1. Mixing cylinder; 11. Discharging end; 12. Constant temperature chamber; 13. Cooling channel; 2. Rotating shaft; 21. Mixing component; 3. Main material feeding tray; 31. Main material feeding port; 32. Main material feeding channel; 4. Mechanical sealing device; 401. Rotating shaft positioning sleeve; 402. First sealing ring; 403. Spring anti-rotation retaining ring; 404. Compression spring; 405. Spring seat ring; 406. Stationary sealing ring; 407. Rotating sealing ring; 408. Second sealing ring; 409. Secondary sealing ring; 410. Mechanical sealing body; 411. Third sealing ring; 412. Fourth sealing ring; 413. Lubricant inlet; 414. Centering clamp; 4 15. Centering lock ring; 416. Centering screw; 417. Positioning screw; 418. Limiting groove; 419. Limiting rib; 420. Sleeve positioning screw; 421. Shaft positioning screw; 422. Spring guide; 5. Mounting plate; 51. Fixed bracket; 52. Limit bearing; 6. Motor; 61. Reducer; 7. Synchronous pulley assembly; 71. Active pulley; 72. Driven pulley; 73. Synchronous belt; 8. Auxiliary material nozzle; 81. Nozzle valve body; 82. Sealing connection sleeve; 83. Check valve sealing screw; 84. Screw head; 85. Conical inner wall; 86. Check valve cross nut; 87. Check spring; 9. Slot-type photoelectric switch. DETAILED DESCRIPTION

[0027] The utility model provides a rotary mixer, which solves the problems of poor effect and low precision of the rotary mixer in the prior art, and makes the slurry input, mixing and output processes more accurate and stable, ensuring the consistency and controllability of the process.

[0028] See also Figure 1 A rotary mixer according to an embodiment of the present invention comprises a mixing drum 1 and a rotating shaft 2, wherein the outer side of the rotating shaft 2 has a stirring member 21 such as a stirring tooth ( Figure 1 The specific structure is not shown in the figure), the rotating shaft 2 and the stirring member 21 are located in the stirring drum 1, and can rotate along its long axis in the stirring drum 1 to stir and mix the materials in the stirring drum 1. Figure 1 The lower end of the mixing drum 1 is the discharge end 11, and the end of the rotating shaft 2 ends at the discharge end 11, and the mixed material is discharged from the discharge end 11. Figure 1The main material feeding disc 3 and the mechanical sealing device 4 are sealed and connected in sequence, and the sealing connection method is, for example, a flange connection, and a sealing ring is sandwiched between adjacent structures. The main material feeding disc 3 is, for example, disc-shaped and annular, and can be called a resin disc when the main material is a resin. The main material feeding disc 3 has a main material feeding port 31 that runs from the outside to the inside. The main material feeding disc 3 is sleeved outside the rotating shaft 2 and a main material feeding channel 32 is formed between the main material feeding disc 3 and the rotating shaft 2, so that the material can enter the mixing drum 1 from the outside through the main material feeding port 31 and the main material feeding channel 32. The mechanical sealing device 4 is sealed and sleeved outside the rotating shaft 2, thereby sealing the upper end of the main material feeding channel 32, so that the material cannot enter the upper area.

[0029] More specifically, it also includes a mounting plate 5, and the main material feeding tray 3 (or the mixing drum 1 or the mechanical sealing device 4) is fixedly mounted and connected to the mounting plate 5 through a fixing bracket 51, so that the overall external structure is connected and fixed as a whole. A limit bearing 52 is provided on the mounting plate 5 and / or the fixing bracket 51, and the limit bearing 52 is sleeved outside the rotating shaft 2. The limit bearings 52 are preferably more than two and are spaced at a certain distance, so that the fixed position of the central axis of the rotating shaft 2 is ensured by the fixed position limit bearings 52.

[0030] It also includes a motor 6, preferably a variable frequency motor, as a driving component. The motor 6 is connected to the rotating shaft 2 through a synchronous pulley assembly 7, and the motor 6 and the mixing drum 1 are located on the same side of the mounting plate 5, more specifically, the motor 6 and the mixing drum 1 are arranged in parallel; the synchronous pulley assembly 7 is located on the other side of the mounting plate 5. The synchronous pulley assembly 7 includes a driving pulley 71 and a driven pulley 72, and a synchronous belt 73 is connected to the driving pulley 71 and the driven pulley 72. The driving pulley 71 is connected to the output end of the motor 6, and the driven pulley 72 is coaxially arranged with the rotating shaft 2, relatively fixed, and rotates together. Further, a reducer 61 is fixedly installed and connected on the mounting plate 5, and the motor 6 is connected to the driving pulley 71 through the reducer 61. The transmission ratio of the synchronous pulley assembly 7 is, for example, 1:1. The mounting plate 5 is used to be connected and fixed to the frame of the overall equipment on the production line, so as to install and fix the rotary mixer as a whole to the desired position.

[0031] See also Figure 2a to Figure 2c According to some embodiments, the stirring member 21 includes protruding teeth on the outer side of the rotating shaft 2; or, the inner side of the stirring drum 1 has protruding teeth; or, both the outer side of the rotating shaft 2 and the inner side of the stirring drum 1 have protruding teeth and the positions are staggered.

[0032] Specifically, Figure 2aIn the illustrated embodiment, the arrangement of the protruding teeth on the outside and inside is staggered in the axial and circumferential directions of the rotating shaft 2, which is convenient for installation and disassembly, and is conducive to the output of the mixed slurry. The protruding teeth are, for example, columnar, plate-shaped, or conical, and the cross-sectional shape of the protruding teeth is, for example, circular, square, triangular, or star-shaped. The arrangement of the protruding teeth is, for example, regularly arranged in a lattice along the axial and circumferential directions. The position of the protruding teeth in the circumferential direction is, for example, eight evenly distributed points. In this scheme, a toothed structure is used for stirring and mixing, which helps to improve the mixing effect, mix multiple materials evenly, and avoid bubbles generated after mixing that affect subsequent film formation.

[0033] In such Figure 2b In the illustrated embodiment, there are protruding teeth only on the outer side of the rotating shaft 2, and the protruding teeth are tapered, and the end of the tapered end is a tip and close to the inner wall of the mixing drum 1. The positions of the protruding teeth in the circumferential direction are, for example, eight evenly distributed points. The positions of the protruding teeth in the axial direction are, for example, regularly arranged in a lattice shape or arranged in a cylindrical spiral line.

[0034] In such Figure 2c In the illustrated embodiment, the arrangement of the outer and inner protruding teeth is staggered in the circumferential direction of the rotating shaft 2; the sum of the lengths of the outer and inner protruding teeth in the radial direction is less than the maximum distance between the inner side of the mixing drum 1 and the outer side of the mixing member 21. In other words, no matter what arrangement is used in the axial direction, the outer and inner protruding teeth will not collide during the operation of the equipment. The positions of the protruding teeth in the circumferential direction are, for example, eight evenly distributed points. The positions of the protruding teeth in the axial direction are, for example, regularly arranged in a lattice or arranged in a cylindrical spiral.

[0035] In other embodiments, only the protruding teeth are provided on the inner side of the mixing drum 1, and the stirring member 21 on the outer side of the rotating shaft 2 adopts a non-toothed structure as in the prior art. Another example is that there are protruding edges (in a straight line or a curve along the axial direction) on the inner side of the mixing drum 1. Another example is that the protruding part on the stirring member 21 is plate-shaped (the plate is parallel, perpendicular or inclined to the axial direction), or paddle-shaped (the outer end of the protruding part on the stirring member 21 is larger than the inner end) or spiral-shaped (similar to a thread or a drill bit), etc.

[0036] For example, in the production process of polyimide film, the rotary mixer needs to mix the main material and auxiliary materials with different physical and chemical properties. For this purpose, an auxiliary material nozzle 8 is provided on the mixing cylinder 1 (for example, at the end away from the discharge end 11) to input auxiliary materials such as imidization reagents. The auxiliary material nozzle 8 seals through the side wall of the mixing cylinder 1, and a check structure is provided in the auxiliary material nozzle 8 to prevent the auxiliary material from flowing back. It should be noted that for different process uses, the main material input may also be optionally provided with a check structure. For example, in the production process of polyimide film, the viscosity of the main material resin is large, and it is pushed or squeezed into the rotary mixer, so a check structure is not required. As needed, one or more auxiliary material nozzles 8 may be selected.

[0037] More specifically, see Figure 3 In a preferred embodiment, the auxiliary material nozzle 8 includes a tubular nozzle valve body 81 and a sealing connection sleeve 82. The sealing connection sleeve 82 is sealed with the mixing drum 1, and the nozzle valve body 81 is sealedly connected in the sealing connection sleeve 82. The sealing connection is, for example, a sealing ring is sandwiched between adjacent components. The output end of the nozzle valve body 81 ( Figure 3 The nozzle body 81 is provided with a check valve sealing screw 83, one end of which is a conical screw head 84 located near the output end of the nozzle body 81, and the nozzle body 81 has a conical inner wall 85 whose shape matches the screw head 84, and the screw head 84 and the conical inner wall 85 can fit tightly. The other end of the check valve sealing screw 83 is threadedly connected with a check valve cross nut 86. For the structure of the check valve cross nut 86, please refer to Figure 4 The cross nut 86 of the check valve is connected to or in contact with the inner wall of the nozzle valve body 81 through the check spring 87. In this way, a check structure is formed. For example, a hole is provided on the cross nut 86 of the check valve to insert and fix the check spring 87. The inner cavity structure of the nozzle valve body 81 matches its internal components. A step is formed on the inner wall of the nozzle valve body 81. The check spring 87 is a compression spring, and the check spring 87 is in contact with the step. In the natural state where no external force is applied (or the external force is small), under the action of the elastic restoring force of the check spring 87, the sealing screw 83 of the check valve moves to the inner wall of the nozzle valve body 81. Figure 3 When the left side of the nozzle is tightened, the screw head 84 and the conical inner wall 85 are tightly fitted, so that the material cannot enter the left input end from the right output end; when the material is pressed in from the left side, the material enters the screw head 84 through the gap between the inner cavity structure of the nozzle valve body 81 and its internal components, and the pressure of the material pushes the screw head 84 to the right, so that the material can be discharged from the right output end. In addition, Figure 3 In the preferred embodiment shown, the nozzle valve body 81 is a split structure having three parts that are sealed and connected to each other, so as to facilitate the processing of the tapered inner wall 85, the assembly of the overall structure, etc., and to facilitate regular disassembly and cleaning.

[0038] See also Figures 5 to 7 The preferred mechanical sealing device 4 includes a rotating shaft positioning sleeve 401, which is sleeved on the rotating shaft 2, and a first sealing ring 402 is sandwiched between the rotating shaft positioning sleeve 401 and the rotating shaft 2 to achieve sealing. In the direction pointing to the discharge end 11, an elastic top tightening member, a static sealing ring 406 and a rotating sealing ring 407 are sequentially sleeved on the outer side of the rotating shaft positioning sleeve 401. A second sealing ring 408 is sandwiched between the rotating sealing ring 407 and the rotating shaft positioning sleeve 401 to achieve sealing. Under the action of the elastic top tightening member, the static sealing ring 406 and the rotating sealing ring 407 are in contact with each other and sealed; for example, the rotating shaft positioning sleeve 401 is at one end ( Figure 5 The right end of the convex ring is provided with a convex ring, and the rotating seal ring 407 is matched and clamped on the outside of the convex ring. The inner and outer sides of the convex ring are respectively provided with seal ring grooves to set the first seal ring 402 and the second seal ring 408. The secondary seal ring 409 and the mechanical seal body 410 are sequentially sleeved on the outer side of the static seal ring 406, and the third seal ring 411 is sandwiched between the secondary seal ring 409 and the static seal ring 406. The fourth seal ring 412 is sandwiched between the mechanical seal body 410 and the secondary seal ring 409. The first seal ring 402, the second seal ring 408, the third seal ring 411 and the fourth seal ring 412 are all O-rings. In this way, a complete seal is achieved in the axial direction. Figure 5 For example, the material cannot flow from the right end of the rotating shaft 2 to the left end of the rotating shaft 2. The mechanical seal body 410 has a lubricant inlet 413 that passes from the outside to the inside, and the lubricant inlet 413 is connected to the part of the static seal ring 406 and the rotating seal ring 407 that are in conflict with each other, so that lubricant can be provided to reduce the friction between the static seal ring 406 and the rotating seal ring 407, so that the friction between the two is smooth and the top seal is maintained.

[0039] More specifically, the elastic tensioning member includes a spring anti-rotation retaining ring 403 sleeved on the outside of the rotating shaft positioning sleeve 401, the mechanical seal body 410 extends to the end of the spring anti-rotation retaining ring 403 and has a baffle, and the spring anti-rotation retaining ring 403 is engaged with the mechanical seal body 410 to limit the spring anti-rotation retaining ring 403. The spring anti-rotation retaining ring 403 is connected to a spring seat ring 405 through a compression spring 404, and the spring seat ring 405 is sleeved on the outside of the rotating shaft positioning sleeve 401, and the spring seat ring 405 is in conflict with or connected to the stationary sealing ring 406. In this way, the required force is provided to the stationary sealing ring 406.

[0040] Preferably, the elastic tensioning member further includes a spring guide 422 connected to the spring anti-rotation retaining ring 403 and / or the mechanical seal body 410, the spring guide 422 is columnar and its length direction is parallel to the axial direction of the rotating shaft positioning sleeve 401. The spring guide 422 and the compression spring 404 are both multiple and distributed along the circumference of the rotating shaft positioning sleeve 401, and the compression spring 404 is sleeved on the outside of the spring guide 422. The structure of using multiple springs and equipped with guide columns ensures that the circumference of the stationary sealing ring 406 is basically uniformly subjected to axial pressure at all locations.

[0041] More preferably, a centering clamp 414 (preferably detachable) is provided at one end of the mechanical seal body 410 away from the discharge end 11, and a centering lock ring 415 (preferably detachable) is also sleeved on the outer side of the rotating shaft positioning sleeve 401. The centering clamp 414 and the centering lock ring 415 are provided with through screw mounting holes and are installed with centering screws 416. Under the action of the centering screws 416, the centering lock ring 415 and the centering clamp 414 are in conflict, so that the position of the centering clamp 414 is ensured by structural design, and the centering lock ring 415 can be fixed in the desired position after installation, that is, the position of the whole being concentric (axis coincidence). The centering lock ring 415 and the rotating shaft positioning sleeve 401 are provided with through top screw mounting holes and are installed with positioning top screws 417, and a plurality of positioning top screws 417 are distributed in the circumferential direction. The positioning top screws 417 extend inward to further fix the rotating shaft 2 and the mechanical seal device 4 in the circumferential direction.

[0042] More specifically, a limiting groove 418 is provided on the mechanical seal body 410. The limiting groove 418 is annular and concentric with the rotating shaft positioning sleeve 401. The centering clip 414 is engaged with the limiting groove 418 and is detachable. For example, the centering clip 414 is block-shaped and is located outside the centering lock ring 415. The centering clip 414 and the centering lock ring 415 are located at one end of the mechanical seal body 410 away from the rotating seal ring 407. The inner side of the centering clip 414 is engaged with the centering lock ring 415. The end face of the centering clip 414 has a protrusion and is engaged with the limiting groove 418. The protrusion is further preferably an inclined surface on the outside to facilitate positioning, installation and removal. The centering clip 414 is distributed in the circumferential direction for more than three (including three), preferably three evenly distributed in the circumferential direction. The position of the centering lock ring 415 is determined by a three-point circle method. An end of the centering lock ring 415 away from the mechanical seal body 410 is provided with a limiting rib 419 extending inwardly, and the limiting rib 419 is engaged with the rotating shaft positioning sleeve 401 to provide further limiting and facilitate installation.

[0043] Further preferably, the positioning screw 417 includes a sleeve positioning screw 420 and a shaft positioning screw 421. The sleeve positioning screw 420 is used to further position the rotating shaft positioning sleeve 401 in the axial direction of the rotating shaft 2, for example, the sleeve positioning screw 420 supports or clamps the rotating shaft positioning sleeve 401, but does not squeeze the rotating shaft inward; more specifically, for example, from the figure, the sleeve positioning screw 420 is smaller, and the corresponding screw mounting hole is smaller; the inner side end of the sleeve positioning screw 420 is a positioning end (for example, a smooth, threadless column), and the corresponding screw mounting hole of the rotating shaft positioning sleeve 401 is a positioning hole, and the positioning end is plugged into the positioning hole in a matching manner (the two are basically the same in shape and size, and there is basically no gap between them). However, as can be seen from the figure, the shaft positioning screw 421 and the corresponding screw installation hole are relatively large; the inner side end of the shaft positioning screw 421 penetrates the rotating shaft positioning sleeve 401 and contacts the rotating shaft 2, and uses friction or forms a snap connection with the rotating shaft 2 to further fix the centering lock ring 415, the rotating shaft positioning sleeve 401 and the rotating shaft 2 together. In the preferred embodiment, there are nine positioning screws 417, which are divided into three groups evenly distributed along the circumference, each group includes a sleeve positioning screw 420 and two shaft positioning screws 421 located on both sides of the sleeve positioning screw 420; and the line connecting the two opposite shaft positioning screws 421 on both sides of the rotating shaft 2 passes through the axis of the rotating shaft 2, so that the force and positioning of the rotating shaft 2 are more stable.

[0044] As a further supplementary explanation, the stationary sealing ring 406 and the rotating sealing ring 407 are preferably corrosion-resistant sealing rings, that is, the material is a corrosion-resistant material, preferably perfluoroether, which has excellent tolerance in corrosive environments, and the operating temperature range is -70°C to 250°C, which can be preferably used for high-performance sealing. The remaining sealing rings (at least including the first sealing ring 402, the second sealing ring 408, the third sealing ring 411, and the fourth sealing ring 412) are also preferably corrosion-resistant sealing rings, using corrosion-resistant materials such as EPDM rubber, fluororubber, etc. The lubricant inlet 413 is connected to an external device for providing a lubricant compatible with the process; wherein, compatible with the process means that, for example, for the rotary mixer of the embodiment, the lubricant should use the same liquid as the solvent of the mixed liquid to prevent contamination, and the specific selection is based on the actual process. The function of the centering clamp 414 and the centering screw 416 is to ensure that the mechanical seal body 410, the rotating shaft positioning sleeve 401 and the main shaft are concentric when the centering clamp 414 and the centering screw 416 are locked. After the sleeve positioning screw 420 and the shaft positioning screw 421 are installed, it is preferred to remove the centering clamp 414 and the centering screw 416 and keep them intact for the next debugging. If the equipment is operated without removal, the centering clamp 414 and the centering screw 416 may cause unnecessary damage to the rotation of the main shaft.

[0045] See also Figure 1In a preferred embodiment, the mixing drum 1 has a constant temperature chamber 12 and a temperature measuring device (not shown in the figure) near the discharge end 11. The temperature measuring device is used to indirectly measure the temperature of the material. The constant temperature chamber 12 is used to control the temperature of the output material. The temperature measuring device is connected to the temperature control system of the constant temperature chamber 12, thereby guiding the setting of the temperature of the constant temperature chamber 12 and enabling automatic control. Preferably, the temperature measuring device is arranged in the side wall of the mixing drum 1, and a blind hole from the outside to the inside is opened in the side wall to install the temperature measuring device. The temperature measuring end of the temperature measuring device is close to the inside of the mixing drum 1 but does not penetrate the side wall of the mixing drum 1 on the inside, thereby making the temperature measurement result close to the actual temperature of the material while avoiding direct contact between the temperature measuring device and the material.

[0046] Furthermore, the outer side of the mixing drum 1 is provided with a cooling channel 13. For example, the cylindrical outer surface of the mixing drum 1 is provided with a spiral columnar baffle, and the mixing drum 1 is provided with a cylindrical outer sleeve, and a spiral cooling channel 13 is formed between the outer sleeve and the spiral columnar baffle; furthermore, water inlets and outlets are provided at the upper and lower ends of the outer sleeve, and the water inlets and outlets are connected to the cooling channel 13, so that a cooling medium such as cooling water is continuously introduced into the cooling channel 13. It should be noted that, in the production process of polyimide film, for example, the rotating mixing will generate a large amount of heat, so that the temperature of the mixing drum 1 increases, and therefore cooling is required; preferably, a cooling channel 13 and a constant temperature chamber 12 are provided at the same time, and the temperature of the constant temperature chamber 12 is adjusted by cooling to achieve the desired constant temperature. It can be imagined that in some other embodiments, the constant temperature chamber 12 has a heating / cooling component to achieve the desired constant temperature.

[0047] In summary, the rotary mixer of the present invention adopts the main material feeding disc as the feeding port, and the feeding disc is a disc-shaped component for feeding, so it is convenient to be stably sealed and installed with adjacent components through flange connection; and a mechanical sealing device is used to seal one end of the main material feeding disc, so that the feeding material enters the mixing cylinder, but does not enter the area at the front end of the rotating shaft for realizing transmission, positioning and other functions; thus, the sealing of the structure is ensured, the service life of the mechanical structure can be effectively extended, the working effect of the rotary mixer is ensured, and it is convenient to carry out inspection and maintenance, etc.; and, this scheme improves the overall transmission structure of the rotary mixer The scheme has been optimized, and the traditional direct connection between the motor and the rotating shaft has been improved to a transmission connection through a synchronous pulley assembly, which fundamentally avoids the risk of materials in the mixer entering the motor drive part and affecting the transmission, and helps to make the rotation of the rotating shaft and the stirring parts more stable, and provides a buffering effect to avoid the situation where, for example, a malfunction occurs in the stirring part and the structure is damaged under the large driving force of the motor. At the same time, it can optimize the overall layout and help improve space utilization. At the same time, this scheme has also been optimized in terms of mechanical sealing devices, auxiliary material nozzles and mixing barrels, so as to achieve better sealing effects and temperature control effects.

Claims

1. A rotary mixer, characterized in that: The invention comprises a mixing drum (1) and a rotating shaft (2); a mixing component (21) is provided on the outer side of the rotating shaft (2); the rotating shaft (2) and the mixing component (21) are located inside the mixing drum (1); one end of the mixing drum (1) is a discharge end (11); a main material feed tray (3) and a mechanical sealing device (4) are sequentially sealed and connected at the end of the mixing drum (1) away from the discharge end (11); the main material feed tray (3) has a main material feed tray (3) which is connected from the outside to the inside; The main material inlet plate (3) is sleeved outside the rotating shaft (2) and a main material inlet channel (32) is formed between the main material inlet plate (3) and the rotating shaft (2); the mechanical sealing device (4) is sealingly sleeved outside the rotating shaft (2); the stirring component (21) includes protruding teeth on the outside of the rotating shaft (2), or the inside of the stirring barrel (1) has protruding teeth, or both the outside of the rotating shaft (2) and the inside of the stirring barrel (1) have protruding teeth and the positions are staggered.

2. The rotary mixer according to claim 1, characterized in that It also includes a mounting plate (5), and the main material feeding tray (3) or the mixing drum (1) or the mechanical sealing device (4) is fixedly mounted and connected to the mounting plate (5) via a fixing bracket (51); a limit bearing (52) is provided on the mounting plate (5) and / or the fixing bracket (51), and the limit bearing (52) is sleeved outside the rotating shaft (2).

3. The rotary mixer according to claim 2, characterized in that The invention also comprises a motor (6), which is connected to the rotating shaft (2) through a synchronous pulley assembly (7); the motor (6) and the mixing drum (1) are located on the same side of the mounting plate (5), and the synchronous pulley assembly (7) is located on the other side of the mounting plate (5); the synchronous pulley assembly (7) comprises a driving pulley (71) and a driven pulley (72), and a synchronous belt (73) is connected to the driving pulley (71) and the driven pulley (72), the driving pulley (71) is connected to the output end of the motor (6), and the driven pulley (72) is coaxially arranged with the rotating shaft (2).

4. The rotary mixer according to claim 2, characterized in that A speed reducer (61) is fixedly mounted on the mounting plate (5), and the motor (6) is drivingly connected to the driving pulley (71) via the speed reducer (61).

5. The rotary mixer according to any one of claims 1 to 4, characterized in that: An auxiliary material nozzle (8) is provided on the mixing cylinder (1). The auxiliary material nozzle (8) penetrates the side wall of the mixing cylinder (1) in a sealed manner, and a check structure is provided inside the auxiliary material nozzle (8).

6. The rotary mixer according to claim 5, characterized in that The auxiliary material nozzle (8) comprises a tubular nozzle valve body (81) and a sealing connection sleeve (82), wherein the sealing connection sleeve (82) is sealingly connected to the mixing drum (1), and the nozzle valve body (81) is sealingly connected inside the sealing connection sleeve (82); a check valve sealing screw (83) is arranged inside the nozzle valve body (81); one end of the check valve sealing screw (83) is a conical screw head (84) and is located close to the output end of the nozzle valve body (81), and the inside of the nozzle valve body (81) has a conical inner wall (85) whose shape matches that of the screw head (84); the other end of the check valve sealing screw (83) is sleeved with a check valve cross nut (86), and the check valve cross nut (86) is connected to or in contact with the inner wall of the nozzle valve body (81) through a check spring (87).

7. The rotary mixer according to any one of claims 1 to 4, characterized in that: The mechanical sealing device (4) comprises a rotating shaft positioning sleeve (401), the rotating shaft positioning sleeve (401) is sleeved on the rotating shaft (2), and a first sealing ring (402) is sandwiched between the rotating shaft positioning sleeve (401) and the rotating shaft (2); in a direction pointing to the discharge end (11), an elastic pressing member, a stationary sealing ring (406) and a rotating sealing ring (407) are sleeved in sequence on the outer side of the rotating shaft positioning sleeve (401); a second sealing ring (408) is sandwiched between the rotating sealing ring (407) and the rotating shaft positioning sleeve (401); the stationary sealing ring (406) and the rotating sealing ring (407) are ) are in contact with each other and are sealed; a secondary sealing ring (409) and a mechanical sealing body (410) are sequentially sleeved on the outside of the stationary sealing ring (406); a third sealing ring (411) is sandwiched between the secondary sealing ring (409) and the stationary sealing ring (406); a fourth sealing ring (412) is sandwiched between the mechanical sealing body (410) and the secondary sealing ring (409); the mechanical sealing body (410) is provided with a lubricant inlet (413) which passes from the outside to the inside, and the lubricant inlet (413) is connected to the portion between the stationary sealing ring (406) and the rotating sealing ring (407) that is in contact with each other.

8. The rotary mixer according to claim 7, characterized in that A centering clamp (414) is provided at one end of the mechanical seal body (410) away from the discharge end (11); a centering lock ring (415) is also sleeved on the outer side of the rotating shaft positioning sleeve (401); through screw mounting holes are provided on the centering clamp (414) and the centering lock ring (415) and centering screws (416) are installed thereon; through top screw mounting holes are provided on the centering lock ring (415) and the rotating shaft positioning sleeve (401) and positioning top screws (417) are installed thereon, and a plurality of positioning top screws (417) are distributed in the circumferential direction.

9. The rotary mixer according to claim 8, characterized in that The positioning screw (417) includes a sleeve positioning screw (420) and a shaft positioning screw (421); the inner end of the shaft positioning screw (421) penetrates the rotating shaft positioning sleeve (401) and contacts the rotating shaft (2).

10. The rotary mixer according to any one of claims 1 to 4, characterized in that: The mixing drum (1) is provided with a constant temperature chamber (12) and a temperature measuring device near the discharge end (11), and the temperature measuring device is connected to the temperature control system of the constant temperature chamber (12); the temperature measuring device is arranged in the side wall of the mixing drum (1), and the temperature measuring end of the temperature measuring device is close to the inside of the mixing drum (1) but does not penetrate the side wall of the mixing drum (1) on the inside; and / or the outside of the mixing drum (1) is provided with a cooling channel (13).

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