Continuous polyester loop stirrer, manufacturing method and high-viscosity polymerization reactor

Abstract

The present invention discloses a continuous polyester ring-type stirrer, a manufacturing method thereof, and a high-viscosity polymerization reactor, belonging to the technical field of stirring equipment. The continuous polyester ring-type stirrer mainly includes a grid cylinder body provided with a plurality of film hanging holes, and a circular ring plate is fixed to the inner wall of the grid cylinder body; the first circular ring plate located at the low-viscosity end D of the grid cylinder body is a perforated circular ring plate; retention circular ring plates are sequentially arranged at intervals on the inner wall of the grid cylinder body from the perforated circular ring plate towards the high-viscosity end G of the grid cylinder body. The continuous polyester ring-type stirrer is manufactured by adopting a production method of "double-region partition and concentric feeding". The stirrer of the present invention enables the polymer melt to be retained without material accumulation, has a large film hanging area and good film hanging effect, the small-molecule by-products volatilize quickly, and the polymerization reaction efficiency is high; the manufacturing method is efficient, low in cost, and the manufactured product has high quality. It is of extremely important significance for improving the overall quality of the high-viscosity polymerization reactor and simplifying the later maintenance work of the whole machine.

Description

Technical Field

[0001] The present invention belongs to the technical field of stirring equipment, and in particular, relates to a continuous polyester ring stirrer which has fully and uniform mixing, a large film-forming area, can retain materials without material accumulation, can easily diffuse and release small molecular byproducts, has a simple structural design and is easy to manufacture, is easy to clean and maintain, and has high practical value; a method for manufacturing a continuous polyester ring stirrer which adopts "double-zone partitioned concentric feeding", has regular welding, is durable and reliable, can complete the entire stirrer processing and molding by only one manufacturing equipment, and has high production efficiency; and a high-viscosity polymerization reactor using the stirrer. Background Art

[0002] A horizontal polymerization reactor is a closed container placed horizontally for realizing the polymerization reaction process. This reactor is widely used in the production of polymer materials, such as plastics, rubber and other polymers. The horizontal polymerization reactor mainly includes a shell sealed at both ends, with an agitator inside, which is connected by a transmission device. The polymer melt enters the inner cavity of the reactor from the material inlet. Driven by the transmission device, the melt is lifted by the agitator and forms a film in the process of rising and falling. Then, in the high vacuum environment of the gas phase outlet, a polymerization reaction occurs. Low molecular substances, alcohol reaction products and other small molecular by-products are extracted from the gas phase outlet. The molecular chain of the polymer increases, the degree of polymerization increases, and the characteristic viscosity of the melt also increases. Under the action of its own weight and the melt pump, the high viscosity material is discharged from the material outlet.

[0003] The agitator is one of the core components of a horizontal polymerization reactor. The Chinese patent document with patent application number 2003201202525 discloses a continuous polyester squirrel cage agitator, which is applied to a horizontal polymerization reactor and mainly includes "a squirrel cage frame composed of a support tube and two flower plates, two short shafts respectively connected to the outer ends of the two flower plates, a number of moving discs arranged between the two flower plates, each moving disc has evenly distributed through holes, a vent hole is opened at the center, and connecting holes are evenly distributed around the circumference. The moving disc is arranged between the two flower plates through the connecting holes and the support tube, and a shaft sleeve is arranged between adjacent moving discs, the shaft sleeve is sleeved on the support tube, and the shaft sleeves are lengthened one by one from one end to the other end. At least one support ring is arranged on the squirrel cage frame, and a through hole matching the diameter of the support tube is opened in the circumference of the support ring, and the support ring is sleeved on the support tube through the through hole and fixed by welding." This traditional squirrel cage agitator has a complex structural design, high difficulty in production and manufacturing, and is difficult to clean and maintain in the later stage, and has high maintenance costs.

[0004] Designing a continuous polyester agitator with a simple structure, easy to clean and maintain, and the agitator must have good film-forming effect and easy diffusion of small molecule by-products; at the same time, developing an efficient and reliable manufacturing method for this new product is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] The object of the present invention is to provide, in view of the deficiencies in the prior art, a continuous polyester ring stirrer with the advantages of sufficient and uniform mixing, large film hanging area, ability to retain materials without material accumulation, easy diffusion and removal of small molecule by-products, simple structure design, easy manufacturing, easy cleaning and maintenance, and high practical value, a manufacturing method of a continuous polyester ring stirrer that adopts "double-region partition and concentric feeding", has regular welding, high durability and reliability of the manufactured stirrer, can complete the processing and forming of the entire stirrer with only one manufacturing device, and has high production efficiency, and a high-viscosity polymerization reactor using the stirrer.

[0006] The present invention is achieved through the following technical solutions:

[0007] A continuous polyester ring stirrer includes a grid cylinder body provided with a plurality of film hanging holes, and a plurality of ring plates are fixedly arranged on the inner wall of the grid cylinder body at intervals.

[0008] Among them, the first ring plate located at the low-viscosity end D of the grid cylinder body is a perforated ring plate, and a plurality of material passing holes for the circulation of materials are opened on the perforated ring plate; a plurality of retention ring plates for blocking materials are sequentially arranged at intervals on the inner wall of the grid cylinder body from the perforated ring plate towards the high-viscosity end G of the grid cylinder body.

[0009] The low-viscosity end plate assembly is fixedly installed at the low-viscosity end D of the grid cylinder body, and the high-viscosity end plate assembly is fixedly installed at the high-viscosity end G of the grid cylinder body.

[0010] Preferably, the retention ring plate and the perforated ring plate are concentric with the grid cylinder body.

[0011] The film hanging holes are rectangular, and a plurality of film hanging holes are arranged at equal intervals along the circumferential and axial directions of the grid cylinder body; each circle of film hanging hole groups formed by a plurality of film hanging holes in the circumferential direction of the grid cylinder body is a circumferential film hanging circle, and the area between two adjacent circumferential film hanging circles is a cylinder rib, and the ring plate is fixed at the middle position of the cylinder rib.

[0012] Preferably, the width of the cylinder rib is 2.5 - 3.5 times the thickness of the ring plate.

[0013] A manufacturing method of the above continuous polyester ring stirrer includes the following operating steps:

[0014] Step 1: Prepare the grid cylinder body, low-viscosity end plate assembly, high-viscosity end plate assembly, and ring plate in advance for standby. The grid cylinder body is provided with rectangular film hanging holes.

[0015] Step 2: Use a lifting device to place the grid cylinder on the load-bearing support platform; on both sides of the load-bearing support platform, there are turntable feeding mechanisms for transporting parts; the high-viscosity turntable feeding mechanism is located on one side of the high-viscosity end G of the grid cylinder, and the low-viscosity turntable feeding mechanism is located on one side of the low-viscosity end D of the grid cylinder; the central axes of the annular discs transported by the high-viscosity turntable feeding mechanism and the low-viscosity turntable feeding mechanism are collinear with the central axis of the grid cylinder.

[0016] Step 3: Transport and weld the annular discs from the middle to both sides; the high-viscosity turntable feeding mechanism transports the annular discs in the high-viscosity area in sequence from the center line H to the high-viscosity end G; the low-viscosity turntable feeding mechanism transports the annular discs in the low-viscosity area in sequence from the center line H to the low-viscosity end D; weld one annular disc each time one is transported.

[0017] Step 4: After all the annular discs are welded, weld the high-viscosity end plate assembly and the low-viscosity end plate assembly.

[0018] Preferably, the conveying position of the annular disc is determined by a free positioner.

[0019] The free positioner includes a positioner body with a guiding cone head fixedly provided at the head and a reference positioning ring fixedly provided at the tail. The guiding cone head is successively provided with an eccentric wheel and an anti-rotation block with equal length and width that are fixedly integrated with the positioner body at the tail end; in the width direction of the film hanging hole, the anti-rotation block has a clearance fit with the film hanging hole; between the anti-rotation block and the reference positioning ring, there is also a limit moving ring movably sleeved on the positioner body, and a tension spring is provided between the limit moving ring and the reference positioning ring.

[0020] Preferably, the positioner body is also provided with a handle for easy grasping; when the handle is in a horizontal position, the eccentric wheel is in a vertical state and the anti-rotation block is in a normal placement state.

[0021] Preferably, the high-viscosity turntable feeding mechanism and the low-viscosity turntable feeding mechanism adopt the same structural design, which includes a jaw chuck, a support cross beam fixedly integrated with the jaw chuck, and a support vertical beam for support. A ring positioning table concentric with the jaw chuck is fixedly provided on the rim of the jaw chuck; the ring positioning table includes a magnetic reference ring body with a plurality of suction magnets embedded at intervals in the circumferential direction, and a support flange located inside the magnetic reference ring body and protruding from the surface of the magnetic reference ring body. The diameter of the magnetic reference ring body is smaller than the diameter of the annular disc.

[0022] Preferably, the load-bearing support platform is supported on the bearing surface, and the high-viscosity turntable feeding mechanism and the low-viscosity turntable feeding mechanism both use a ball screw mechanism to reciprocate on the bearing surface; the ball screw mechanism includes a driving motor and a transmission screw. The transmission screw is threadedly connected to a feeding base provided with a roller trolley, and the roller trolley slides along a guiding chute opened on the bearing surface. The feeding base is fixedly connected to the support vertical beam.

[0023] Preferably, the bearing surface of the load-bearing support platform is an arc surface adapted to the grid cylinder, and movable clamping hands are arranged at the axial edges of the load-bearing support platform to facilitate the grid cylinder to be accommodated and move on the arc surface; the movable clamping hands swing in the movable groove through a connecting shaft and are limited by limit strips fixed on the inner wall of the movable groove.

[0024] A high-viscosity polymerization reactor applying the above continuous polyester ring-type stirrer.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. The combined action of the circular ring pieces and the matrix-distributed film-hanging holes in the present invention achieves the functional effect of polymer melt retention without material accumulation; the circular ring pieces create a retention area for the melt, increasing the residence time of the melt, providing sufficient time for the orientation and arrangement of polymer molecular chains, facilitating the diffusion and escape of small-molecule by-products, and the polymer melt in the retention area will not form a "dead zone". During the continuous rotation of the stirrer, the melt in the retention area will be continuously sheared and updated by the film-hanging holes near the circular ring pieces, and the mixing is sufficient and uniform, further promoting the rapid diffusion and escape of small-molecule by-products; in addition, the inner circle of the circular ring pieces in the present invention provides a fast channel for the small-molecule by-products to flow to the gas-phase outlet of the reaction kettle, accelerating the small-molecule volatilization process, and the polymerization reaction efficiency is high.

[0027] 2. The present invention has a large film-hanging area and good film-hanging effect; the matrix-distributed film-hanging holes can ensure that the polymer melt is uniformly film-hung on the cylinder body, and the uniform film thickness is beneficial to heat exchange during the reaction process, maintaining uniform temperature, further facilitating the diffusion and escape of small molecules, and further improving the polymerization reaction efficiency.

[0028] 3. The stirrer of the present invention has a simple, ingenious and practical structural design, is easy to manufacture, and is also easy to clean and maintain later, effectively reducing the later maintenance cost of the high-viscosity polymerization reactor.

[0029] 4. The production method of the present invention has high production efficiency and the produced stirrer has reliable and durable quality; the "dual-region partition concentric feeding" production and manufacturing method is adopted, that is, by setting a turntable feeding mechanism on both sides of the grid cylinder body, with the center line H as the boundary, the two turntable feeding mechanisms are each responsible for the circular ring pieces in half of the area of the stirrer. The stirrer has a large volume and a long size, and it is difficult to feed in a single direction. The manufacturing method of the present invention effectively reduces the manufacturing difficulty of the ring-type stirrer.

[0030] 5. The free positioner of the present invention has a simple, ingenious and practical structural design. The free positioner fully combines the structural characteristics of the grid cylinder body, accurately locates the position of the circular ring pieces at a very low cost, effectively reduces the personalized requirements for large and complex robotic arms, thereby reducing the equipment customization cost, and creating considerable economic benefits for the enterprise.

[0031] 6. The turntable feeding mechanism of the present invention has a unique structural design. On the one hand, it can ensure that the circular ring piece and the grid cylinder always maintain a concentric state. This design makes the distance between the circular ring piece and the inner wall of the grid cylinder uniform, so as to achieve uniform heat distribution during the welding process, ensure the regularity of the weld, and significantly improve the reliability of the welding quality. On the other hand, the turntable feeding mechanism of the present invention can not only convey the circular ring piece concentrically, but also convey the end plate assembly concentrically. The equipment has strong versatility and flexibility, and the processing and forming of the entire agitator can be completed on one manufacturing equipment.

[0032] 7. The present invention has broad application prospects in the technical field of high-viscosity polymerization reactors, and is of extremely important significance for improving the overall quality of high-viscosity polymerization reactors and simplifying the later maintenance work of the whole machine. Description of the Drawings

[0033] Figure 1 It is a schematic structural diagram of the agitator of the present invention in the front view direction.

[0034] Figure 2 It is the present invention Figure 1 The sectional structural schematic diagram along the line A-A.

[0035] Figure 3 It is a schematic structural diagram of the agitator of the present invention in the three-dimensional direction Figure 1 .

[0036] Figure 4 It is a schematic structural diagram of the agitator of the present invention in the three-dimensional direction Figure 2 .

[0037] Figure 5 It is a schematic diagram of the concentric welding structure of the circular ring piece and the grid cylinder of the agitator of the present invention (taking the retained circular ring piece as an example in the figure).

[0038] Figure 6 It is a schematic diagram of the non-concentric welding structure of the circular ring piece and the grid cylinder of the agitator of the present invention (taking the retained circular ring piece as an example in the figure).

[0039] Figure 7 It is a schematic structural diagram of the production equipment applied to the manufacturing method of the agitator of the present invention.

[0040] Figure 8 It is the present invention Figure 7 The enlarged view of part B1.

[0041] Figure 9 It is the present invention Figure 7 The enlarged view of part B2.

[0042] Figure 10 It is the present invention Figure 7 The enlarged view of part B3.

[0043] Figure 11 is a schematic structural diagram of the invention Figure 10 after the organ cover is hidden.

[0044] Figure 12 is a schematic structural diagram of the free locator of the invention.

[0045] Figure 13 is a schematic three-dimensional structural diagram of the free locator of the invention.

[0046] Figure 14 is a schematic structural diagram of the assembly of the free locator and the grid cylinder of the invention.

[0047] Figure 15 is a schematic structural diagram of the manufacturing scenario of the invention when transporting the ring slice.

[0048] Figure 16 is a schematic structural diagram of the manufacturing scenario of the invention when transporting the end plate assembly.

[0049] In the figure: 11, grid cylinder; 111, film hanging hole; 112, retention ring slice; 113, perforated ring slice; 1131, material passing hole; 114, low-viscosity end plate assembly; 1141, low-viscosity end plate; 1142, short shaft; 115, high-viscosity end plate assembly; 1151, high-viscosity end plate; 1152, long shaft; 116, circumferential film hanging ring; 117, welding layer; 118, cylinder rib; 21, load-bearing support platform; 211, arc surface; 212, movable clamp; 2121, wear-resistant rubber pad; 213, connecting shaft; 214, movable groove; 215, limiting strip; 22, high-viscosity turntable feeding mechanism; 221, jaw chuck; 2211, disc edge; 222, support cross beam; 223, support vertical beam; 224, feeding base; 225, connecting claw; 226, ring positioning platform; 2261, suction magnet; 2262, magnetic reference ring body; 2263, support flange; 23, low-viscosity turntable feeding mechanism; 25, bearing surface; 251, guide chute; 252, organ cover; 26, ball screw mechanism; 261, drive motor; 262, transmission screw; 263, roller trolley; 27, climbing ladder; 28, free locator; 281, locator body; 2811, handle; 2812, guide cone head; 2813, reference positioning ring; 282, eccentric wheel; 283, anti-rotation block; 284, limit movable ring; 285, tension spring. Specific embodiments

[0050] In order to enable readers to better understand the design concept of the present invention, the technical solutions of the present invention will be further described below in conjunction with the drawings and embodiments. It should be noted that the orientation terms that may be involved in the following paragraphs, including but not limited to "upper, lower, left, right, front, and back", are based on the visual orientation shown in the corresponding specification drawings. It should not and should not be regarded as a limitation of the protection scope or technical solution of the present invention. Its purpose is only to facilitate those skilled in the art to better understand the technical solutions described in the present invention.

[0051] In the description of this specification, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with the common general knowledge, design specifications, standard documents, etc. in the art according to specific situations.

[0052] Embodiment 1

[0053] As Figures 1 to 5 shown, this embodiment provides a continuous polyester ring stirrer, which mainly includes a grid cylinder 11 provided with a number of film hanging holes 111. A plurality of ring plates are fixedly arranged on the inner wall of the grid cylinder 11 at intervals. The ring plates are fixed to the inner wall of the grid cylinder 11 by welding; the first ring plate located at the low-viscosity end D of the grid cylinder 11 is a perforated ring plate 113, and a plurality of material passing holes 1131 for material flow are provided on the perforated ring plate 113; a plurality of retention ring plates 112 for blocking materials are arranged at intervals on the inner wall of the grid cylinder 11 in sequence from the perforated ring plate 113 towards the high-viscosity end G of the grid cylinder 11. A low-viscosity end plate assembly 114 is fixedly installed at the low-viscosity end D of the grid cylinder 11, and a high-viscosity end plate assembly 115 is fixedly installed at the high-viscosity end G of the grid cylinder 11; among them, the low-viscosity end plate assembly 114 includes a low-viscosity end plate 1141 and a short shaft 1142; the high-viscosity end plate assembly 115 includes a high-viscosity end plate 1151 and a long shaft 1152. The area from the low-viscosity end D of the grid cylinder 11 to the center line H can be understood as the low-viscosity area, and the area from the center line H to the high-viscosity end G of the grid cylinder 11 can be understood as the high-viscosity area. The polymer melt just entering from the high-viscosity polymerization reactor feed port has very low viscosity and good fluidity; materials with high viscosity need to rely on flipping to pass materials, while materials with low viscosity can directly pass materials while flipping. Therefore, in this embodiment, the first ring plate is designed as a perforated ring plate 113 to accelerate the overall reaction process.

[0054] The combined action of the circular ring piece and the matrix-distributed film-forming holes achieves the functional effect of polymer melt retention without material accumulation. The circular ring piece creates a retention zone for the melt, increasing the residence time of the melt, providing sufficient time for the orientation and arrangement of polymer molecular chains, facilitating the diffusion and escape of small molecule by-products. Moreover, the polymer melt in the retention zone does not form a "dead zone". During the continuous rotation of the stirrer, the melt in the retention zone will be continuously sheared and updated by the film-forming holes near the circular ring piece, and the mixing is fully uniform, further promoting the rapid diffusion and escape of small molecule by-products.

[0055] In this embodiment, the film-forming area is large and the film-forming effect is good. Specifically, it is reflected in: 1. The matrix-distributed film-forming holes can ensure that the polymer melt uniformly forms a film on the cylinder body. The uniform film thickness is conducive to heat exchange during the reaction process, maintaining a uniform temperature, further facilitating the diffusion and escape of small molecules, and the polymerization reaction efficiency is high; 2. The circular ring piece makes the polymer melt also form a film during the rising and falling process, and the inner circle of the circular ring piece provides a fast channel for the small molecule by-products to flow to the gas phase outlet of the reaction kettle, effectively promoting the small molecule volatilization process and further improving the polymerization reaction efficiency. Thus, from the low-viscosity end D to the high-viscosity end G, the viscosity of the polymer melt becomes larger and larger.

[0056] The stirrer structure design in this embodiment is simple, ingenious, and practical, easy to manufacture, and also easy to clean and maintain later, effectively reducing the later maintenance cost of the high-viscosity polymerization reactor.

[0057] In this embodiment, the retention circular ring piece 112 and the perforated circular ring piece 113 are both concentric with the grid cylinder body 11; the film-forming holes 111 are rectangular, and several film-forming holes 111 are regularly arranged at equal intervals along the circumferential and axial directions of the grid cylinder body 11; each circle of film-forming hole groups formed by multiple film-forming holes 111 in the circumferential direction of the grid cylinder body 11 is a circumferential film-forming ring 116, and the area between two adjacent circumferential film-forming rings 116 is the cylinder body rib 118, and the circular ring piece is fixed at the middle position of the cylinder body rib 118. This structural design has uniform stress, and the stirrer has strong stability and durability. Combined Figure 5 、 Figure 6 Further analysis shows that Figure 5 shows a schematic diagram of the welding structure where the circular ring piece of the stirrer is concentric with the grid cylinder body, Figure 6 shows a schematic diagram of the welding structure if the circular ring piece is not concentric with the grid cylinder body. Comparing Figure 5 and Figure 6 it can be found that the concentric position can make the welding layer 117 regular. The regular welding layer 117 has uniform stress and can effectively improve the durability and reliability of the stirrer.

[0058] In this embodiment, the width of the cylinder body rib 118 is 2.5 - 3.5 times the thickness of the circular ring piece. Such a design aims to facilitate the welding process for workers and avoid the emergence of "dead zones" for flowing materials.

[0059] Example 2

[0060] Taking the continuous polyester ring stirrer described in Example 1 as an example, this example provides a manufacturing method for a continuous polyester ring stirrer, combined with Figures 7 to 16 , specifically including the following operating steps:

[0061] A manufacturing method for a continuous polyester ring stirrer includes the following operating steps,

[0062] Step 1: Prepare the grid cylinder 11, low-viscosity end plate assembly 114, high-viscosity end plate assembly 115, and ring plates in advance for standby. A film hanging hole 111 in a rectangular shape is provided on the grid cylinder 11.

[0063] Step 2: Use a lifting device to place the grid cylinder 11 on the load-bearing support platform 21; on both sides of the load-bearing support platform 21, there are turntable feeding mechanisms for transporting parts; the high-viscosity turntable feeding mechanism 22 is located on the high-viscosity end G side of the grid cylinder 11, and the low-viscosity turntable feeding mechanism 23 is located on the low-viscosity end D side of the grid cylinder 11. The central axes of the ring plates transported by the high-viscosity turntable feeding mechanism 22 and the low-viscosity turntable feeding mechanism 23 are collinear with the central axis of the grid cylinder 11.

[0064] Step 3: Transport and weld the ring plates from the middle to both sides; the high-viscosity turntable feeding mechanism 22 transports the ring plates in the high-viscosity area in sequence from the center line H to the high-viscosity end G; the low-viscosity turntable feeding mechanism 23 transports the ring plates in the low-viscosity area in sequence from the center line H to the low-viscosity end D; weld one ring plate each time it is transported. Of course, welding is generally spot-welded for positioning first, and after all the ring plates are spot-welded and fixed, each ring plate is then fully welded in sequence. The feeding process can be that the two turntable feeding mechanisms alternate in feeding, that is, the high-viscosity turntable feeding mechanism 22 (low-viscosity turntable feeding mechanism 23) transports a ring plate, spot-welds it, and then returns to the initial position. Subsequently, the low-viscosity turntable feeding mechanism 23 (high-viscosity turntable feeding mechanism 22) transports a ring plate, spot-welds it, and returns to the initial position, and then the high-viscosity turntable feeding mechanism 22 (low-viscosity turntable feeding mechanism 23) transports the next ring plate, and so on, with the two turntable feeding mechanisms alternating in feeding. It can also be in units of regions, and after all the ring plates in one region are transported, then transport another region, that is, after the high-viscosity turntable feeding mechanism 22 (low-viscosity turntable feeding mechanism 23) transports all the ring plates in the high-viscosity region (low-viscosity region), then the low-viscosity turntable feeding mechanism 23 (high-viscosity turntable feeding mechanism 22) transports the ring plates in the low-viscosity region (high-viscosity region).

[0065] Step 4: After all the ring pieces are welded, weld the high-viscosity end plate assembly 115 and the low-viscosity end plate assembly 114. The high-viscosity end plate assembly 115 is conveyed by the high-viscosity turntable feeding mechanism 22 and welded integrally with the grid cylinder 11; the low-viscosity end plate assembly 114 is conveyed by the low-viscosity turntable feeding mechanism 23 and welded integrally with the grid cylinder 11. In this way, the continuous polyester ring-type agitator is formed.

[0066] In this embodiment, the welding work of the ring pieces is carried out by the operator drilling into the grid cylinder 11. The conveying position of the ring pieces in Step 3 is determined by the free positioner 28, and the welder inserts the free positioner 28 from the inside to the outside. As Figure 14 shown, the free positioner 28 specifically includes a positioner body 281 with a guiding cone head 2812 fixedly provided at the head and a reference positioning ring 2813 fixedly provided at the tail. An eccentric wheel 282 and an anti-rotation block 283 with equal length and width are sequentially provided at the tail end of the guiding cone head 2812; in the width direction of the film hanging hole 111, the anti-rotation block 283 is in clearance fit with the film hanging hole 111; a limiting movable ring 284 movably sleeved on the positioner body 281 is further provided between the anti-rotation block 283 and the reference positioning ring 2813, and a tension spring 285 is provided between the limiting movable ring 284 and the reference positioning ring 2813. The free positioner 28 makes full use of the shape characteristics of the film hanging hole 111. The film hanging hole 111 is rectangular, and the anti-rotation block 283 is a cube; the length and width of the anti-rotation block 283 are equal and adapted to the width of the film hanging hole 111, and the thickness is equivalent to the thickness of the grid cylinder 11.

[0067] Taking the toroidal sheet in the high-viscosity conveying area as an example, the working principle of the free locator 28 is introduced as follows: On the first circumferential film-hanging ring 116 on the right side (the side close to the center line H) of the cylindrical rib 118 of the toroidal sheet to be installed, any film-hanging hole 111 is selected as the installation hole. The eccentric wheel 282 is placed vertically. After the guiding cone head 2812, the eccentric wheel 282, and the anti-rotation block 283 pass through the film-hanging hole 111 in sequence, when the free locator 28 is continuously pushed outward, it will be blocked by the limit movable ring 284, and the tension spring 285 is compressed. By continuously pushing the free locator 28, after the anti-rotation block 283 completely drills out of the film-hanging hole 111, it is rotated 90° forward or backward, and then the pushing of the free locator 28 is stopped. At this time, the free locator 28 will move in the reverse direction under the action of the tension spring 285. Since the anti-rotation block 283 is still in the upright state (i.e., the orthographic projection direction is not skewed) after rotating 90°, the anti-rotation block 283 will enter the film-hanging hole 111 until it is limited by the eccentric wheel 282. Under the combined action of the tension spring 285 and the eccentric wheel 282, the free locator 28 is firmly fixed on the film-hanging hole 111. At this time, the reference positioning ring 2813 is one of the reference limit points of the toroidal sheet. Insert 2 to 4 free locators 28 on the circumferential film-hanging ring 116 where the free locator 28 needs to be installed, and generally two are enough. The design of the anti-rotation block 283 has two functions: First, it enables the operator to easily confirm whether it has rotated to the 90-degree position by the naked eye, simplifies the operation process, and improves work efficiency. Second, after the anti-rotation block is inserted into the film-hanging hole, it can effectively prevent the relative rotation of the free locator relative to the film-hanging hole; if this rotation is not controlled, it may cause the accidental slipping of the free locator, which will affect the normal operation of production.

[0068] The feeding method in units of regions is significantly superior to the alternating feeding in terms of operation convenience and process rationality. In this embodiment, the manufacturing method of the above-mentioned annular stirrer is further supplemented and described by the feeding method in regions.

[0069] After preparing the parts to be welded, the ring wafers in the high-viscosity area (low-viscosity area) are sequentially conveyed in the direction from the center line H to the high-viscosity end G (low-viscosity end D). Start the high-viscosity turntable feeding mechanism 22 (low-viscosity turntable feeding mechanism 23) to convey the first ring wafer in the middle position of the high-viscosity area (low-viscosity area). Before the conveyance arrives, the welder pre-inserts the free positioner 28 into the corresponding film-hanging hole 111 to position the first ring wafer. The high-viscosity turntable feeding mechanism 22 (low-viscosity turntable feeding mechanism 23) always runs towards the center of the grid cylinder 11 until the first ring wafer touches the reference positioning ring 2813 of the free positioner 28 and then stops moving. After spot-welding the first ring wafer, the high-viscosity turntable feeding mechanism 22 returns to the initial position, adsorbs and conveys the second ring wafer, and so on until all the ring wafers in the high-viscosity area (low-viscosity area) are completely spot-welded. Subsequently, start the low-viscosity turntable feeding mechanism 23 (high-viscosity turntable feeding mechanism 22), and the operation process is the same as that of the high-viscosity turntable feeding mechanism 22 (low-viscosity turntable feeding mechanism 23). To avoid cumbersome writing, it will not be elaborated. After spot-welding is completed, all the ring wafers are fully welded, and after full welding, the low-viscosity end plate assembly 114 and the high-viscosity end plate assembly 115 are welded.

[0070] The agitator in this embodiment has high production efficiency and reliable and durable quality. It adopts the production and manufacturing method of "dual-region partition and concentric feeding", that is, by setting the turntable feeding mechanisms on both sides of the grid cylinder, with the center line H as the boundary, the two turntable feeding mechanisms are each responsible for the ring wafers in half of the area of the agitator; the agitator is large in volume and long in size, and it is difficult to feed in a single direction. The manufacturing method of the present invention effectively reduces the manufacturing difficulty of the ring agitator.

[0071] The structure of the free positioner in this embodiment is ingeniously designed, fully combining the structural characteristics of the grid cylinder, achieving accurate positioning of the ring wafer position at a very low cost, effectively reducing the personalized requirements for large and complex robotic arms, thereby reducing the equipment customization cost and creating considerable economic benefits for the enterprise.

[0072] This embodiment has broad application prospects in the technical field of high-viscosity polymerization reactors, and is of extremely important significance for improving the overall quality of high-viscosity polymerization reactors and simplifying the later maintenance work of the whole machine.

[0073] Embodiment 3

[0074] On the basis of the above embodiments, this embodiment continues to describe in detail the technical features involved and the functions and roles played by these technical features in the present invention, so as to help those skilled in the art fully understand the technical solution of the present invention and reproduce it.

[0075] As Figures 7 to 16As shown in the figure, the high-viscosity turntable feeding mechanism 22 and the low-viscosity turntable feeding mechanism 23 in this embodiment adopt the same structural design, which includes a jaw chuck 221, a supporting cross beam 222 fixedly integrated with the jaw chuck 221, and a supporting vertical beam 223 for support. A circular ring positioning table 226 concentric with the jaw chuck 221 is fixedly provided on the disk edge 2211 of the jaw chuck 221. The circular ring positioning table 226 is fixedly connected to the disk edge 2211 through connecting claws 225 regularly distributed circumferentially on the disk edge 2211. The circular ring positioning table 226 includes a magnetic reference ring body 2262 with a plurality of attracting magnets 2261 embedded at intervals in the circumferential direction, and a supporting flange 2263 located inside the inner circle of the magnetic reference ring body 2262 and protruding from the surface of the magnetic reference ring body 2262. The diameter of the magnetic reference ring body 2262 is smaller than the diameter of the circular ring piece. The diameter of the magnetic reference ring body 2262 is smaller than the diameter of the circular ring piece, so as to facilitate the subsequent spot welding fixation between the circular ring piece and the inner wall of the grid cylinder 11. The structural design of the turntable feeding mechanism is simple and ingenious. The circular ring piece is fed manually or by an existing small robot. The inner diameter of the circular ring piece is equivalent to the outer diameter of the supporting flange 2263. The circular ring piece is placed in contact with the magnetic reference ring body 2262 and is attracted and fixed by the attracting magnets 2261 on the magnetic reference ring body 2262. The magnetic reference ring body 2262 can firmly attract the circular ring piece, and the circular ring piece runs stably and can maintain the concentric position relationship with the grid cylinder 11, laying a good foundation for the subsequent regular welding of the circular ring piece. In addition, due to the stable attraction and no need to worry about the circular ring piece slipping during operation, the supporting flange 2263 only needs to be able to support the circular ring piece, and there is no need to be too long in the axial direction. In this way, the movement stroke of the circular ring piece towards the magnetic reference ring body 2262 can be shortened, thus simplifying the feeding process of the circular ring piece.

[0076] The turntable feeding mechanism in this embodiment can not only convey the circular ring piece concentrically, but also convey the end plate assembly concentrically. The clamping of the end plate assembly is mainly realized through the jaw chuck 221 of the turntable feeding mechanism. The jaw chuck 221 of the high-viscosity turntable feeding mechanism 22 is used to fix the high-viscosity end plate assembly 115, and the jaw chuck 221 of the low-viscosity turntable feeding mechanism 23 is used to fix the low-viscosity end plate assembly 114. The jaw chuck 221 is only used to clamp the end plate assembly, and the clamped workpiece remains unchanged. Therefore, the stroke of the jaws on the jaw chuck 221 changes little. To clamp the upper and lower end plate assemblies, only the adjustment knob of the jaw chuck 221 needs to be slightly adjusted, which is convenient and fast to operate. The structural design of the turntable feeding mechanism in this embodiment is unique. On the one hand, it can ensure that the circular ring piece and the grid cylinder always maintain a concentric state. This design makes the distance between the circular ring piece and the inner wall of the grid cylinder uniform, so as to achieve uniform heat distribution during the welding process, ensure the regularity of the weld, and significantly improve the reliability of the welding quality. On the other hand, the turntable feeding mechanism of the present invention can not only convey the circular ring piece concentrically, but also convey the end plate assembly concentrically. The equipment has strong versatility and flexibility, and the processing and forming of the entire agitator can be completed on one manufacturing equipment.

[0077] In this embodiment, the load-bearing support platform 21 is supported on the bearing surface 25. The high-viscosity turntable feeding mechanism 22 and the low-viscosity turntable feeding mechanism 23 both use a ball screw mechanism 26 to reciprocate on the bearing surface 25. The ball screw mechanism 26 includes a driving motor 261 and a transmission screw 262. The transmission screw 262 is threadedly connected to a feeding base 224 provided with a roller trolley 263. The roller trolley 263 slides along a guiding chute 251 opened on the bearing surface 25. The feeding base 224 is fixedly connected to a supporting vertical beam 223. The structural design of the ball screw mechanism 26 is simple, easy to manufacture, and stable in operation. An accordion cover 252 for protection is provided outside the transmission screw 262.

[0078] In this embodiment, the bearing surface of the load-bearing support platform 21 is an arc surface 211 adapted to the grid cylinder 11. An active clamp 212 for facilitating the accommodation of the grid cylinder 11 on the arc surface 211 is provided at the axial edge of the load-bearing support platform 21. The active clamp 212 swings in an active groove 214 via a connecting shaft 213 and is limited by a limiting strip 215 fixed on the inner wall of the active groove 214. This structural design aims to accelerate the process of placing the grid cylinder on the arc surface and ensure the efficiency of the operation. The self-adaptive adjustment function of the active clamp plays a good guiding role in correctly placing the grid cylinder on the arc surface of the load-bearing support platform. A wear-resistant rubber pad 2121 for enhancing the friction force is also fixedly provided on the surface of the active clamp 212.

[0079] For the convenience of actual operation, in this embodiment, a climbing ladder 27 for facilitating operation is provided on the bearing surface 25 on both sides of the grid cylinder 11.

[0080] In this embodiment, the locator main body 281 is also provided with a handle 2811 for easy grasping. When the handle 2811 is in a horizontal position, the eccentric wheel 282 is in a vertical state and the anti-rotation block 283 is in a normal placement state. This position design of the handle 2811, the eccentric wheel 282, and the anti-rotation block 283 focuses on the grasping posture of the operator to achieve a more comfortable and user-friendly experience.

[0081] Embodiment 4

[0082] This embodiment provides a high-viscosity polymerization reactor, which applies the continuous polyester ring-type stirrer described in any one of the above embodiments.

[0083] In summary, these are only the preferred embodiments of the present invention and are not used to limit the scope of implementation of the present invention. All equivalent changes and modifications made in accordance with the shape, structure, features, and spirit of the scope of the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A method for manufacturing a continuous polyester ring agitator, characterized in that: The continuous polyester ring agitator comprises a grid cylinder (11) provided with a plurality of film-forming holes (111), wherein a plurality of circular ring pieces distributed at intervals are fixedly provided on the inner wall of the grid cylinder (11); The first annular sheet located at the low-viscosity end D of the grid cylinder (11) is a perforated annular sheet (113), and a plurality of material passing holes (1131) for circulating materials are provided on the perforated annular sheet (113); a plurality of retention annular sheets (112) for blocking materials are sequentially arranged on the inner wall of the grid cylinder (11) from the perforated annular sheet (113) toward the high-viscosity end G of the grid cylinder (11); A low-viscosity end D of the grid cylinder (11) is fixedly mounted with a low-viscosity end plate assembly (114), and a high-viscosity end G of the grid cylinder (11) is fixedly mounted with a high-viscosity end plate assembly (115); The method comprises the following steps: Step 1: Prepare in advance a grid cylinder (11), a low-viscosity end plate assembly (114), a high-viscosity end plate assembly (115), and a circular ring sheet for use, and a rectangular film-hanging hole (111) is opened on the grid cylinder (11); Step 2: Using a lifting device, place the grid cylinder (11) on a load-bearing support platform (21); both sides of the load-bearing support platform (21) are provided with a turntable feeding mechanism for conveying parts; the high-viscosity turntable feeding mechanism (22) is located on the high-viscosity end G side of the grid cylinder (11), and the low-viscosity turntable feeding mechanism (23) is located on the low-viscosity end D side of the grid cylinder (11); the central axes of the annular pieces conveyed by the high-viscosity turntable feeding mechanism (22) and the low-viscosity turntable feeding mechanism (23) are both in line with the central axis of the grid cylinder (11); Step 3: conveying and welding the annular pieces from the middle to both sides; the high-viscosity turntable feeding mechanism (22) conveys the annular pieces located in the high-viscosity area in sequence from the center line H to the high-viscosity end G; the low-viscosity turntable feeding mechanism (23) conveys the annular pieces located in the low-viscosity area in sequence from the center line H to the low-viscosity end D; each time a piece of annular piece is conveyed, a piece of annular piece is welded; Step 4: After all the annular pieces are welded, the high-viscosity end plate assembly (115) and the low-viscosity end plate assembly (114) are welded; The high-viscosity turntable feeding mechanism (22) and the low-viscosity turntable feeding mechanism (23) adopt the same structural design, and include a clamping jaw chuck (221), a supporting crossbeam (222) fixedly integrated with the clamping jaw chuck (221), and a supporting vertical beam (223) that plays a supporting role. A circular ring positioning platform (226) that is coaxial with the clamping jaw chuck (221) is fixedly provided on the disc edge (2211) of the clamping jaw chuck (221); the circular ring positioning platform (226) includes a magnetic reference ring body (2262) inlaid with a plurality of attracting magnets (2261) at intervals in the circumferential direction, and a supporting flange (2263) located in the inner circle of the magnetic reference ring body (2262) and protruding from the surface of the magnetic reference ring body (2262), and the diameter of the magnetic reference ring body (2262) is smaller than the diameter of the circular ring sheet.

2. The method for manufacturing a continuous polyester ring agitator according to claim 1, characterized in that: The conveying position of the circular ring piece is determined by a free positioner (28); The free positioner (28) comprises a positioner body (281) having a guide cone head (2812) fixedly provided at the head and a reference positioning ring (2813) fixedly provided at the tail; an eccentric wheel (282) fixedly provided with the positioner body (281) and an anti-rotation block (283) having equal length and width are provided in sequence at the tail end of the guide cone head (2812); the anti-rotation block (283) and the film hanging hole (111) are clearance-matched in the width direction of the film hanging hole (111); a limit movable ring (284) movably sleeved on the positioner body (281) is further provided between the anti-rotation block (283) and the reference positioning ring (2813); and a tension spring (285) is provided between the limit movable ring (284) and the reference positioning ring (2813).

3. The method for manufacturing a continuous polyester ring agitator according to claim 2, characterized in that: The positioner body (281) is also provided with a handle (2811) for easy gripping; when the handle (2811) is in a horizontal position, the eccentric wheel (282) is in a vertical state, and the anti-rotation block (283) is in a normal state.

4. The method for manufacturing a continuous polyester ring agitator according to claim 1, characterized in that: The load-bearing support platform (21) is supported on a bearing surface (25), and the high-viscosity turntable feeding mechanism (22) and the low-viscosity turntable feeding mechanism (23) both use a ball screw mechanism (26) to reciprocate on the bearing surface (25); the ball screw mechanism (26) comprises a driving motor (261) and a transmission screw (262), the transmission screw (262) is threadedly connected to a feeding base (224) provided with a roller trolley (263), the roller trolley (263) slides along a guide groove (251) provided on the bearing surface (25), and the feeding base (224) is fixedly connected to the supporting vertical beam (223).

5. The method for manufacturing a continuous polyester ring agitator according to claim 1, characterized in that: The supporting surface of the load-bearing support platform (21) is an arcuate surface (211) adapted to the grid cylinder (11), and an axial edge of the load-bearing support platform (21) is provided with a movable gripper (212) for accommodating the grid cylinder (11) on the arcuate surface (211); the movable gripper (212) swings in the movable groove (214) via a connecting shaft (213) and is limited by a limit strip (215) fixed on the inner wall of the movable groove (214).

6. The method for manufacturing a continuous polyester ring agitator according to claim 1, characterized in that: The retention annular sheet (112) and the perforated annular sheet (113) are both cocentric with the grid cylinder (11); The film-hanging holes (111) are rectangular in shape, and a plurality of the film-hanging holes (111) are regularly arranged at equal intervals in the circumferential and axial directions of the grid cylinder (11); each circle of film-hanging hole groups formed by the plurality of film-hanging holes (111) in the circumferential direction of the grid cylinder (11) is a circumferential film-hanging circle (116), and the area between two adjacent circumferential film-hanging circles (116) is a cylinder rib (118), and the annular sheet is fixed at the middle position of the cylinder rib (118).

7. The method for manufacturing a continuous polyester ring agitator according to claim 6, characterized in that: The width of the cylindrical rib (118) is 2.5-3.5 times the thickness of the circular ring sheet.

8. A high viscosity polymerization reactor using the continuous polyester ring agitator prepared by the manufacturing method according to any one of claims 1 to 7.

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