A kind of stirring device for cross-linking polymerization of polyvinylpyrrolidone

Abstract

The utility model provides a polyvidone cross-linking polymerization stirring device, comprising a stirring tank and a motor fixed at the bottom end of the stirring tank, a rotating plate is installed at the bottom end of the stirring tank, a plurality of stirring plates are fixed on the top end of the rotating plate in an annular array, a plurality of stirring plates are elastically inserted with telescopic plates, a scraper is protruding from the side wall of the telescopic plate, a magnetic suction rod is fixed at the center position of one end of the telescopic plate extending into the stirring plate, an electromagnetic plate attracted to the magnetic suction rod is embedded and fixed in the stirring plate, a top cover is provided at the top end of the stirring tank, a feed pipe is installed at the top end of the top cover, a plurality of legs are fixed at the bottom end of the stirring tank, a discharge pipe is installed at the center position of the bottom end surface of the stirring tank, a sealing plug is threadedly inserted at the bottom end of the discharge pipe, so as to facilitate the adjustment of the blade structure of the stirring device, and the stirring device is suitable for mixing and stirring liquid and powder of polyvidone cross-linking polymerization.

Description

Technical Field

[0001] The utility model relates to the technical field of polyvidone polymerization stirring, in particular to a polyvidone cross-linking polymerization stirring device. Background Art

[0002] Cross-linked polyvinylpyrrolidone is a pharmaceutical excipient, which is a water-insoluble synthetic cross-linked vinylpyrrolidone homopolymer. Cross-linked polyvinylpyrrolidone is prepared by cross-linking polymerization reaction by using sodium hydroxide solution as an initiator and adding vinylpyrrolidone. Phase change occurs during the cross-linking polymerization reaction. The liquid in the early stage of the cross-linking polymerization reaction is converted into powder in the later stage of the cross-linking polymerization reaction. The existing stirring device for cross-linked polyvinylpyrrolidone cross-linking polymerization has low stirring efficiency and cannot maintain efficient stirring of the early liquid and powder at the same time. The powder accumulated at the bottom of the stirring tank is not stirred evenly with the powder in other parts, resulting in low stirring efficiency.

[0003] The patent with application number 202023151789.0 discloses a stirring device for cross-linking polymerization of cross-linked polyvinylpyrrolidone, including a stirring tank, a rotating motor is fixedly installed on the top of the stirring tank, and the output shaft of the rotating motor is fixedly connected to the top of the rotating rod. The stirring device for cross-linking polymerization of cross-linked polyvinylpyrrolidone drives the rotating rod to rotate by the rotating motor, that is, the stirring arc bar is driven by the stabilizing cone to stir the periphery of the rotating vertical cylinder, and the inner wall and bottom of the stirring tank are scraped synchronously by the stirring arc bar and the arc scraper, so that the material that fits the inner wall enters the stirring zone, and then the spiral propulsion blade is driven synchronously by the rotating rod to stir, and the spiral propulsion principle of the spiral propulsion blade is used to pass the bottom material of the stirring tank, and the rotating vertical cylinder is pushed to the top of the rotating vertical cylinder, and the stirring of the stirring blade is synchronously used to disperse the material to other spaces inside the stirring tank, so that the cross-linking polymerization of cross-linked polyvinylpyrrolidone is stirred more evenly.

[0004] The above technical solution utilizes arc-shaped stirring bars and arc-shaped scrapers to scrape the inner wall and bottom of the stirring tank, so that the material adhered to the inner wall enters the stirring zone, which is suitable for stirring the liquid after it becomes a powder. However, during the stirring process of the liquid, the arc-shaped stirring bars and arc-shaped scrapers will block the flow of the liquid, thereby affecting the stirring efficiency of the liquid. Utility Model Content

[0005] The purpose of the utility model is to provide a polyvidone cross-linking polymerization stirring device in view of the deficiencies in the prior art, which realizes the function of stirring liquid and powder through an adjustable telescopic plate and a scraper in conjunction with a spring and an electromagnetic plate structure for controlling the position of the telescopic plate, thereby solving the problem that the scraper used for powder stirring affects the stirring flow of the liquid.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a polyvidone cross-linking polymerization stirring device, comprising a stirring tank and a motor fixed at the bottom end of the stirring tank, a rotating plate is installed at the bottom end of the stirring tank, a plurality of stirring plates are fixed on the top end of the rotating plate in a circular array, a telescopic plate is elastically inserted into the plurality of stirring plates, a scraper is protruding from the side wall of the telescopic plate, a magnetic suction rod is fixed at the center position of one end of the telescopic plate extending into the stirring plate, and an electromagnetic plate that engages with the magnetic suction rod is embedded and fixed in the stirring plate.

[0007] Preferably, a top cover is provided at the top of the stirring tank, and a feed pipe is installed at the top of the top cover.

[0008] Furthermore, a plurality of legs are fixed to the bottom end of the mixing tank, and a discharge pipe is installed at the center of the bottom end surface of the mixing tank, and a sealing plug is threadedly inserted at the bottom end of the discharge pipe.

[0009] Furthermore, a shaft rotatably inserted into the mixing tank is fixed to the top of the motor, and a driving magnetic sheet is embedded and fixed in a circular array on a side of the shaft facing the rotating plate.

[0010] Furthermore, the top end surface of the rotating plate is inclined, and a positioning hole is provided at the bottom end of the rotating plate.

[0011] Furthermore, a positioning shaft is fixed at the center of the bottom wall of the stirring tank, and the positioning shaft is inserted into the positioning hole.

[0012] Furthermore, springs are embedded in both ends of the stirring plate, and both ends of the spring abut against the inner walls of the telescopic plate and the stirring plate respectively.

[0013] Furthermore, the outer wall of the rotating plate is provided with auxiliary stirring blades, and the auxiliary stirring blades are tightly connected to the bottom wall of the stirring tank.

[0014] The beneficial effects of the utility model are:

[0015] (1) The utility model has a plurality of stirring plates fixed on the top of a rotating plate. When the liquid polyvidone cross-linking polymerization is stirred, the rotating plate stirs through the stirring plate and the telescopic plate fixed thereon. When the polyvidone cross-linking polymerization reaction forms powder, the electromagnetic plate is closed to separate it from the magnetic rod. The spring in the stirring plate pushes the telescopic plate to make the scraper contact with the inner wall of the stirring tank. During the stirring process, the powder adsorbed on the inner wall of the stirring tank is cleaned. At the same time, after stirring, the auxiliary stirring blade pushes the powder on the bottom wall of the stirring tank to discharge it from the discharge pipe. The blade structure of the stirring device is easy to adjust. The utility model is suitable for mixing and stirring the liquid and powder of the polyvidone cross-linking polymerization.

[0016] (2) The utility model has a motor fixedly mounted at the bottom end of the mixing tank, a machine shaft rotatably inserted into the mixing tank is fixedly mounted at the top end of the motor, a driving magnetic sheet is embedded and fixed on the side of the machine shaft facing the motor, and the bottom of the rotating plate is fitted on the positioning shaft through the positioning hole during installation. After the motor is started, the rotating plate is driven to rotate through the driving magnetic sheet, and the inside of the mixing tank is stirred during the rotation. The driving magnetic sheet avoids the leakage of liquid and powder caused by the traditional drive shaft bearing installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the stirring tank of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the rotating plate of the utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the stirring plate of the utility model.

[0021] In the figure: 1. stirring tank; 2. motor; 3. support leg; 4. top cover; 5. feed pipe; 6. rotating plate; 7. positioning shaft; 8. machine shaft; 9. discharge pipe; 10. stirring plate; 11. telescopic plate; 12. positioning hole; 13. driving magnetic sheet; 14. auxiliary stirring blade; 15. scraper; 16. magnetic suction rod; 17. spring; 18. electromagnetic plate. DETAILED DESCRIPTION

[0022] 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 of 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.

[0023] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0024] Embodiment 1

[0025] like Figure 1 and Figure 4 As shown, the present embodiment provides a polyvidone cross-linking polymerization stirring device, comprising a stirring tank 1 and a motor 2 fixed at the bottom end of the stirring tank 1, a rotating plate 6 is installed at the bottom end of the stirring tank 1, a plurality of stirring plates 10 are fixed in a ring array on the top of the rotating plate 6, a telescopic plate 11 is elastically inserted into the plurality of stirring plates 10, a scraper 15 is protruding from the side wall of the telescopic plate 11, and a magnetic suction rod 16 is fixed at the center position of one end of the telescopic plate 11 extending into the stirring plate 10, and an electromagnetic plate 18 that is attracted to the magnetic suction rod 16 is embedded and fixed in the stirring plate 10.

[0026] A top cover 4 is provided at the top of the stirring tank 1, and a feed pipe 5 is installed at the top of the top cover 4. Springs 17 are embedded at both ends of the stirring plate 10, and the two ends of the spring 17 are respectively abutted against the inner walls of the telescopic plate 11 and the stirring plate 10. An auxiliary stirring blade 14 is installed on the outer wall of the rotating plate 6, and the auxiliary stirring blade 14 is tightly connected to the bottom wall of the stirring tank 1. The rotating plate 6 stirs through the stirring plate 10 and the telescopic plate 11 fixed thereon. When the polyvidone cross-linking polymerization reaction forms powder, the electromagnetic plate 18 is closed to separate it from the magnetic rod. The spring 17 in the stirring plate 10 pushes the telescopic plate 11 to make the scraper 15 abut against the inner wall of the stirring tank 1. During the stirring process, the powder adsorbed on the inner wall of the stirring tank 1 is cleaned. At the same time, after stirring, the auxiliary stirring blade 14 pushes the powder on the bottom wall of the stirring tank 1 to discharge it from the discharge pipe 9, which is convenient for adjusting the blade structure of the stirring device.

[0027] Embodiment 2

[0028] like Figure 2 and Figure 3As shown, the components that are the same as or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The difference between the second embodiment and the first embodiment is that: a plurality of legs 3 are fixed to the bottom end of the stirring tank 1, and a discharge pipe 9 is installed at the center position of the bottom end surface of the stirring tank 1, and a sealing plug is threadedly inserted into the bottom end of the discharge pipe 9, and a machine shaft 8 rotatably inserted in the stirring tank 1 is fixed to the top of the motor 2, and a driving magnetic sheet 13 is embedded and fixed on the side facing the machine shaft 8 and the rotating plate 6 in a circular array, the top surface of the rotating plate 6 is inclined, and a positioning hole 12 is opened at the bottom end of the rotating plate 6, a positioning shaft 7 is fixed at the center position of the bottom wall of the stirring tank 1, and the positioning shaft 7 is inserted in the positioning hole 12, and a driving magnetic sheet 13 is embedded and fixed on the side facing the machine shaft 8 and the motor 2, and the bottom of the rotating plate 6 is fitted and sleeved on the positioning shaft 7 through the positioning hole 12 when installed, and the motor 2 drives the rotating plate 6 to rotate through the driving magnetic sheet 13 after starting, and stirs the inside of the stirring tank 1 during the rotation.

[0029] Working steps

[0030] Step 1. When in use, start the motor 2 to drive the machine shaft 8 to rotate, and the rotating plate 6 is stirred by the stirring plate 10 and the telescopic plate 11 fixed thereon. The driving magnetic piece 13 on the machine shaft 8 drives the rotating plate 6 to rotate, and stirs the inside of the stirring tank 1 during the rotation. When the cross-linking polymerization reaction of polyvidone forms powder, the electromagnetic plate 18 is closed to separate it from the magnetic rod. The spring 17 in the stirring plate 10 pushes the telescopic plate 11 to make the scraper 15 abut against the inner wall of the stirring tank 1. During the stirring process, the powder adsorbed on the inner wall of the stirring tank 1 is cleaned. At the same time, after stirring, the auxiliary stirring blade 14 pushes the powder on the bottom wall of the stirring tank 1 to discharge it from the discharge pipe 9, which is convenient for adjusting the blade structure of the stirring device. It is suitable for mixing and stirring liquid and powder of cross-linked polymerization of polyvidone.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A polyvidone cross-linking polymerization stirring device, comprising a stirring tank and a motor fixed at the bottom of the stirring tank, characterized in that: A rotating plate is installed at the bottom end of the stirring tank, and a plurality of stirring plates are fixed on the top end of the rotating plate in a circular array. Telescopic plates are elastically inserted into the plurality of stirring plates, and a scraper is protruding from the side wall of the telescopic plate. A magnetic rod is fixed at the center position of one end of the telescopic plate extending into the stirring plate, and an electromagnetic plate that engages with the magnetic rod is embedded and fixed in the stirring plate.

2. A polyvidone cross-linking polymerization stirring device according to claim 1, characterized in that: The top of the stirring tank is provided with a top cover, and the top of the top cover is installed with a feed pipe.

3. A polyvidone cross-linking polymerization stirring device according to claim 2, characterized in that: A plurality of legs are fixed to the bottom end of the mixing tank, and a discharge pipe is installed at the center of the bottom end surface of the mixing tank, and a sealing plug is threadedly inserted into the bottom end of the discharge pipe.

4. A polyvidone cross-linking polymerization stirring device according to claim 1, characterized in that: A machine shaft rotatably inserted in the stirring tank is fixed on the top of the motor, and a driving magnetic sheet is embedded and fixed in a circular array on a side of the machine shaft facing the rotating plate.

5. A polyvidone cross-linking polymerization stirring device according to claim 1, characterized in that: The top end surface of the rotating plate is inclined, and a positioning hole is provided at the bottom end of the rotating plate.

6. A polyvidone cross-linking polymerization stirring device according to claim 5, characterized in that: A positioning shaft is fixed at the center of the bottom wall of the stirring tank, and the positioning shaft is inserted into the positioning hole.

7. A polyvidone cross-linking polymerization stirring device according to claim 1, characterized in that: Springs are embedded at both ends of the stirring plate, and the two ends of the spring are respectively in contact with the inner wall of the telescopic plate and the stirring plate.

8. A polyvidone cross-linking polymerization stirring device according to claim 1, characterized in that: An auxiliary stirring blade is installed on the outer wall of the rotating plate, and the auxiliary stirring blade is tightly connected to the bottom wall of the stirring tank.

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