Stirring device of polymerization kettle for polypropylene production
By designing two sets of stirring leaves and lifting devices in the polypropylene polymerization kettle, multi-angle stirring and internal and external interactive stirring are achieved, solving the blind spot problem in traditional devices, and improving the stirring efficiency and reaction effect of the polypropylene solution.
Patent Information
- Application Number
- CN202323500772.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2033-12-21
AI Technical Summary
The stirring device of the traditional polypropylene polymerization kettle is prone to blind spots during the stirring process, resulting in the liquid in some areas of the kettle being unable to be fully stirred, affecting the reaction speed and efficiency.
A stirring device including two groups of stirring leaves is designed. The stirring leaves are connected by the fan blade movable shaft, and the internal and external interactive stirring is performed using centrifugal force and polypropylene solution pressure, and the liquid precipitation is reduced through the lifting device to ensure the multi-angle stirring effect.
It effectively reduces the situation where the solution cannot be fully stirred in some areas of the kettle, improves the stirring efficiency of the polypropylene solution, and ensures full mixing of the liquid in the kettle.
Smart Images
Figure CN222325147U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building mixing, in particular to a mixing device of a polymerization kettle for polypropylene production. Background Art
[0002] Polypropylene is a polymer formed by the addition polymerization of propylene. In the production process of polypropylene, the stirring device of the polymerization kettle is one of the important equipment. It is mainly used to fully stir the chemical substances during the reaction process, thereby affecting the progress of the polymerization reaction; in the existing polypropylene polymerization kettle, the design and operation mode of the stirring device have a great influence on the stirring effect and reaction speed; generally speaking, the stirring device of the polymerization kettle includes a motor, a reducer, a stirring shaft and a stirring blade. The motor drives the reducer to operate, and the reducer drives the stirring shaft to rotate. The stirring blade is installed on the stirring shaft, and the liquid in the kettle is stirred by the rotation of the blade.
[0003] However, this traditional stirring device has some problems in practical application: since the stirring blades will generate a certain shear force on the liquid in the kettle when rotating, the liquid in the kettle is also driven to circulate; although this circulating flow can increase the reaction speed to a certain extent, it is also easy to produce dead corners in the kettle, making it impossible for the liquid in certain areas of the kettle to be fully stirred. For this reason, we proposed a stirring device for a polymerization kettle for polypropylene production. Utility Model Content
[0004] 1. Technical issues to be resolved
[0005] In view of the deficiencies in the prior art, the utility model provides a stirring device for a polymerization kettle for polypropylene production, which solves the above-mentioned problems.
[0006] (II) Technical solution
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a stirring device for a polymerization kettle for polypropylene production, comprising a stirring barrel, a stirring cover, and a support, wherein a base is fixedly installed inside the stirring barrel, a limiting block is fixedly connected to the upper end of the base, and a main rotating shaft is movably connected to the base and the limiting block at the axis center, two groups of stirring blades are arranged at the lower end of the main rotating shaft, a rotating device is arranged at the upper end of the main rotating shaft, a driving device is arranged at the top of the rotating device, and lifting devices are arranged on both sides of the rotating device;
[0008] The lifting device includes a first fixed plate, a second fixed plate, a lifting shaft and a support rod. The first fixed plate and the second fixed plate are fixedly connected to the mixing barrel through the support rod. One side of the first fixed plate is fixedly connected to the lifting shaft. A first limiting rod is provided at one end of the lifting shaft, and a second limiting rod is provided at the other end. The other end of the lifting shaft is fixedly connected to the second fixed plate.
[0009] Preferably, the two groups of stirring blades are connected to the side wall of the main rotating shaft in a ring shape, and the two groups of stirring blades are located on the main rotating shaft and are stacked up and down, the stirring blades include a fan blade movable shaft, auxiliary blades, fixed blades and movable grooves, wherein the fixed blades and the auxiliary blades are arranged at intervals from each other, the fixed blades are fixedly installed on the corresponding outer wall of the main rotating shaft close to one side of the main rotating shaft, the fixed blades and the auxiliary blades are movably connected to each other through the fan blade movable shaft, and the fan blade movable shaft is provided with a movable groove that is compatible with the auxiliary blade.
[0010] Preferably, the movably connected driving device at the top end of the main rotating shaft includes a rotating block, a limit block, a first limit block, a first gear, a second limit block, a second gear and a rotating disk. The top of the main rotating shaft is movably connected to the rotating disk. The rotating disk is fixedly connected to the second limit block via a second gear arranged thereon. One side of the second gear engages with the first gear. A first limit block is arranged on the upper end of the first gear. The upper end of the first limit block is movably connected to the limit block, and circular holes matching the rotating block are provided on the first limit block and the limit block. The rotating block is sleeved on the limit block.
[0011] Preferably, the rotating device also includes a first movable rail, a second movable rail, a first movable ball, a first limiting rod, a fixed plate, a second limiting rod, a second movable ball and a rotating shaft limiting block, one end of the main rotating shaft is fixedly connected to the rotating shaft limiting block, the top of the rotating shaft limiting block is fixedly connected to the first movable rail, and the side of the movable rail is movably connected to the first movable ball, and the first limiting rod is welded to one end of the first movable ball, and a lifting device is provided at the other end of the first limiting rod, and a second limiting rod is provided at the other end of the lifting device, and a second movable ball is welded to one end of the second limiting rod, the left side of the second movable ball is movably connected to the second movable rail, and the lower end of the second movable rail is movably connected to the main rotating shaft.
[0012] Preferably, the first movable track includes a first auxiliary plate, a first auxiliary shaft and a second auxiliary plate, the second movable track includes a third auxiliary plate, a second auxiliary shaft and a fourth auxiliary plate, the upper end of the rotating shaft limiting block is provided with a first auxiliary plate, the top end of the first auxiliary plate is provided with a first auxiliary shaft, the second auxiliary plate is connected to the first auxiliary plate via a first auxiliary shaft provided thereunder, the top end of the third auxiliary plate is provided with a second auxiliary shaft, and the fourth auxiliary plate is connected to the third auxiliary plate via a second auxiliary shaft provided thereunder.
[0013] Preferably, the lifting device includes a first fixed plate, a second fixed plate, a lifting shaft and a support rod, the first fixed plate and the second fixed plate are fixedly connected to the mixing barrel through the support rod, one side of the first fixed plate is fixedly connected to the lifting shaft, one end of the lifting shaft is provided with a first limit rod, and the other end is provided with a second limit rod, and the other end of the lifting shaft is fixedly connected to the second fixed plate.
[0014] (III) Beneficial effects
[0015] Compared with the prior art, the utility model provides a stirring device for a polymerization kettle for polypropylene production, which has the following beneficial effects:
[0016] 1. The stirring device of the polymerization kettle for polypropylene production is provided with two groups of stirring blades, each of which is divided into a fixed blade and an auxiliary blade, which are connected by a blade rotating shaft. When stirring, the movable blade can be lifted up by centrifugal force, and the pressure generated by the polypropylene solution causes the auxiliary blade to be lifted up to adjust the matching angle of the polypropylene solution. Through pressure feedback, the polypropylene solution can be effectively stirred interactively inside and outside, which greatly reduces the situation that the solution in some areas of the kettle cannot be fully stirred.
[0017] 2. The stirring device of the polymerization kettle for polypropylene production reduces the precipitation of the stirring liquid through the lifting and tensioning device, solves the problem of dead corners in the stirring device and the problem that the liquid in some areas cannot be fully stirred.
[0018] 3. The stirring device of the polymerization kettle for polypropylene production can greatly improve the multi-angle stirring effect of the solution and further improve the stirring efficiency of the polypropylene solution by driving the lateral rotation of the stirring blades by the main rotating shaft and the longitudinal lifting of the auxiliary blades on the stirring blades. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the overall structure of the agitator of the utility model;
[0020] Figure 2 This is a schematic diagram of the split structure of the upper part of the agitator of the utility model;
[0021] Figure 3 This is a cross-sectional schematic diagram of the agitator of the utility model;
[0022] Figure 4 This is a schematic diagram of the local structure of the stirring blade of the utility model;
[0023] Figure 5 It is a partial structural schematic diagram of the agitator lifting device of the utility model.
[0024] In the figure: 1, mixing barrel; 2, mixing cover; 3, support; 4, main rotating shaft; 5, first auxiliary plate; 6, first movable ball; 7, first limiting rod; 8, first fixed plate; 9, first auxiliary shaft; 10, second limiting rod; 11, second movable ball; 12, third auxiliary plate; 13, second auxiliary shaft; 14, fourth auxiliary plate; 15, rotating block; 16, limiting block; 17, first limiting block; 18, first gear; 19, second limiting block; 20, second gear; 21, rotating disk; 22, limiting block; 23, base; 24, first positioning block; 25, second positioning block; 26, fan blade movable shaft; 27, auxiliary blade; 28, fixed blade; 29, movable groove; 30, rotating shaft limiting block; 31, second auxiliary plate; 32, second fixed plate; 33, lifting shaft; 34, support rod. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] See also Figure 1-5 A stirring device for a polymerization kettle for polypropylene production, comprising a stirring barrel 1, a stirring cover 2, and a support 3. A base 23 is fixedly installed inside the stirring barrel 1, a limiting block 22 is fixedly connected to the upper end of the base 23, and a main rotating shaft 4 is movably connected to the base 23 and the limiting block 22 at the axis center. Two groups of stirring blades are arranged at the lower end of the main rotating shaft 4, a rotating device is arranged at the upper end of the main rotating shaft 4, a driving device is arranged at the top of the rotating device, and lifting devices are arranged on both sides of the rotating device;
[0027] The lifting device includes a first fixed plate 8, a second fixed plate 32, a lifting shaft 33 and a support rod 34. The first fixed plate 8 and the second fixed plate 32 are fixedly connected to the mixing barrel 1 through the support rod 34. One side of the first fixed plate 8 is fixedly connected to the lifting shaft 33. A first limiting rod 7 is provided at one end of the lifting shaft 33, and a second limiting rod 10 is provided at the other end. The other end of the lifting shaft 33 is fixedly connected to the second fixed plate 32.
[0028] Furthermore, two groups of stirring blades are connected to the side wall of the main rotating shaft 4 in an annular shape, and the two groups of stirring blades are located on the main rotating shaft 4 and are stacked up and down. The stirring blades include a first positioning block 24, a second positioning block 25, a blade movable shaft 26, an auxiliary blade 27, a fixed blade 28 and a movable groove 29, wherein the fixed blade 28 and the auxiliary blade 27 are arranged at intervals from each other, and the fixed blade 28 is fixedly installed on the corresponding outer wall of the main rotating shaft 4 near the side of the main rotating shaft 4, the fixed blade 28 and the auxiliary blade 27 are movably connected to each other through the blade movable shaft 26, and the blade movable shaft 26 is provided with an movable groove 29 adapted to the auxiliary blade, one end of the movable groove 29 is fixedly connected to the first positioning block 24 and the other end is fixedly connected to the second positioning block 25, when the stirring blade is stirring, the centrifugal force can lift the movable blade, and the pressure generated by the polypropylene solution makes the auxiliary blade lift up to adjust the adaptation angle of the polypropylene solution, and the pressure feedback makes the polypropylene solution effectively interactively stirred inside and outside, greatly reducing the situation that the solution in some areas of the kettle cannot be fully stirred.
[0029] Furthermore, the movably connected driving device at the top of the main rotating shaft 4 includes a rotating block 15, a limit block 16, a first limit block 17, a first gear 18, a second limit block 19, a second gear 20 and a rotating disk 21. The top of the main rotating shaft 4 is movably connected to the rotating disk 21. The rotating disk 21 is fixedly connected to the second limit block 19 through a second gear 20 arranged thereon. One side of the second gear 20 engages with the first gear 18. A first limit block 17 is arranged on the upper end of the first gear 18. The upper end of the first limit block 17 is movably connected to the limit block 16, and circular holes matching the rotating block 15 are opened on the first limit block 17 and the limit block 16, and the rotating block 15 is sleeved on the limit block 16.
[0030] Furthermore, the rotating device also includes a first movable track, a second movable track, a first movable ball 6, a first limiting rod 7, a fixed plate 8, a second limiting rod 10, a second movable ball 11 and a rotating shaft limiting block 30, one end of the main rotating shaft 4 is fixedly connected to the rotating shaft limiting block 30, the top of the rotating shaft limiting block 30 is fixedly connected to the first movable track, and the side of the movable track is movably connected to the first movable ball 6, and one end of the first movable ball 6 is welded to the first limiting rod 7, and the other end of the first limiting rod 7 is provided with a lifting device, the other end of the lifting device is provided with a second limiting rod 10, and one end of the second limiting rod 10 is welded to the second movable ball 11, the left side of the second movable ball 11 is movably connected to the second movable track, and the lower end of the second movable track is movably connected to the main rotating shaft 4.
[0031] Furthermore, the first movable track includes a first auxiliary plate 5, a first auxiliary shaft 9 and a second auxiliary plate 31, the second movable track includes a third auxiliary plate 12, a second auxiliary shaft 13 and a fourth auxiliary plate 14, the first auxiliary plate 5 is arranged at the upper end of the rotation axis limiting block 30, the first auxiliary plate 5 is arranged at the top end with a first auxiliary shaft 9, the second auxiliary plate 31 is connected to the first auxiliary plate 5 through the first auxiliary shaft 9 arranged thereunder, the third auxiliary plate 12 is arranged at the top end with a second auxiliary shaft 13, and the fourth auxiliary plate 14 is connected to the third auxiliary plate 12 through the second auxiliary shaft 13 arranged thereunder.
[0032] Working principle: When in use, pour the polypropylene solution into the stirring barrel 1. When stirring, the driving device is turned on, so that the driving device drives the lifting device and the two sets of stirring blades to rotate simultaneously through the main rotating shaft 4, so that the stirring blades are adjusted up and down under the adjustment of the lifting device. When moving up and down and rotating, the auxiliary leaves 27 on the stirring blades are raised on the fan blade movable shaft 26, and the polypropylene solution will generate pressure at the same time, so that the polypropylene solution can be adjusted at an adaptive angle so that the stirring liquid at different positions can be effectively stirred during the stirring operation.
[0033] By turning on the driving device, the first gear 18 and the second gear 20 in the driving device rotate, and the force generated by the first gear 18 and the second gear 20 drives the main rotating shaft 4 to work through the rotating disk 21.
[0034] The rotating device is driven to work by the driving device, and the driving device is turned on to drive the main rotating shaft 4 to rotate. The first movable ball 6 set in the first auxiliary plate 5 and the second auxiliary plate 31 and the second movable ball 11 set in the third auxiliary plate 12 and the fourth auxiliary plate 14 work during the rotation of the main rotating shaft 4. The first limiting rod 7 connected to the first movable ball 6 and the second limiting rod 34 connected to the second movable ball 11 drive the first movable ball 6 and the second movable ball 11 to be lifted and lowered through the lifting shaft 33 fixed in the first fixed plate 8 and the second fixed plate 32, so that the stirring blade is lifted and lowered, and finally the polypropylene solution is more fully stirred after a short precipitation.
[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A stirring device for a polymerization kettle for polypropylene production, comprising a stirring barrel (1), a stirring cover (2), and a support (3), characterized in that: A base (23) is fixedly installed inside the mixing barrel (1), the upper end of the base (23) is fixedly connected to the limiting block (22), and the base (23) and the limiting block (22) are movably connected to the main rotating shaft (4) at the axis center, two groups of stirring blades are arranged at the lower end of the main rotating shaft (4), a rotating device is arranged at the upper end of the main rotating shaft (4), a driving device is arranged at the top of the rotating device, and lifting devices are arranged on both sides of the rotating device; The lifting device comprises a first fixed plate (8), a second fixed plate (32), a lifting shaft (33) and a support rod (34); the first fixed plate (8) and the second fixed plate (32) are fixedly connected to the mixing barrel (1) via the support rod (34); one side of the first fixed plate (8) is fixedly connected to the lifting shaft (33); one end of the lifting shaft (33) is provided with a first limiting rod (7) and the other end is provided with a second limiting rod (10); the other end of the lifting shaft (33) is fixedly connected to the second fixed plate (32).
2. The stirring device for a polymerization kettle for polypropylene production according to claim 1, characterized in that: The two groups of stirring blades are connected to the side wall of the main rotating shaft (4) in an annular shape, and the two groups of stirring blades are arranged on the main rotating shaft (4) in an up-and-down stacked manner. The stirring blades include a first positioning block (24), a second positioning block (25), a blade movable shaft (26), an auxiliary blade (27), a fixed blade (28) and a movable groove (29), wherein the fixed blade (28) and the auxiliary blade (27) are arranged at intervals from each other, and the fixed blade (28) is fixedly mounted on the corresponding outer wall of the main rotating shaft (4) on a side close to the main rotating shaft (4), and the fixed blade (28) and the auxiliary blade (27) are movably connected to each other through the blade movable shaft (26), and a movable groove (29) adapted to the auxiliary blade is provided on the blade movable shaft (26), and one end of the movable groove (29) is fixedly connected to the first positioning block (24) and the other end is fixedly connected to the second positioning block (25).
3. The stirring device of the polymerization kettle for polypropylene production according to claim 1, characterized in that: The driving device comprises a rotating block (15), a limiting block (16), a first limiting block (17), a first gear (18), a second limiting block (19), a second gear (20) and a rotating disk (21); the top of the main rotating shaft (4) is movably connected to the rotating disk (21); the rotating disk (21) is fixedly connected to the second limiting block (19) via a second gear (20) arranged thereon; one side of the second gear (20) meshes with the first gear (18); a first limiting block (17) is arranged at the upper end of the first gear (18); the upper end of the first limiting block (17) is movably connected to the limiting block (16); the first limiting block (17) and the limiting block (16) are provided with circular holes matched with the rotating block (15); the rotating block (15) is sleeved on the limiting block (16).
4. The stirring device for a polymerization reactor for polypropylene production according to claim 1, characterized in that: The rotating device further comprises a first movable track, a second movable track, a first movable ball (6), a first limiting rod (7), a fixed plate (8), a second limiting rod (10), a second movable ball (11) and a rotating shaft limiting block (30); one end of the main rotating shaft (4) is fixedly connected to the rotating shaft limiting block (30); the top of the rotating shaft limiting block (30) is fixedly connected to the first movable track; the side of the movable track is movably connected to the first movable ball (6); one end of the first movable ball (6) is welded to the first limiting rod (7); the other end of the first limiting rod (7) is provided with a lifting device; the other end of the lifting device is provided with a second limiting rod (10); one end of the second limiting rod (10) is welded to the second movable ball (11); the left side of the second movable ball (11) is movably connected to the second movable track; and the lower end of the second movable track is movably connected to the main rotating shaft (4).
5. The stirring device for a polymerization reactor for polypropylene production according to claim 4, characterized in that: The first movable track comprises a first auxiliary plate (5), a first auxiliary shaft (9) and a second auxiliary plate (31); the second movable track comprises a third auxiliary plate (12), a second auxiliary shaft (13) and a fourth auxiliary plate (14); the first auxiliary plate (5) is arranged at the upper end of the rotation axis limiting block (30); the first auxiliary shaft (9) is arranged at the top end of the first auxiliary plate (5); the second auxiliary plate (31) is connected to the first auxiliary plate (5) via the first auxiliary shaft (9) arranged thereunder; the third auxiliary plate (12) is arranged at the top end thereof with a second auxiliary shaft (13); and the fourth auxiliary plate (14) is connected to the third auxiliary plate (12) via the second auxiliary shaft (13) arranged thereunder.