Feeding mechanism and PVPP synthesis device

Abstract

The utility model belongs to the technical field of chemical production equipment, and particularly relates to a feeding mechanism and a PVPP synthesizer, the feeding mechanism comprises a reaction kettle, a first feeding pipe and a second feeding pipe, a rotary drum is vertically arranged, the bottom end of the rotary drum is a blind end, the rotary drum is arranged at the top of the reaction kettle, the bottom end of the rotary drum penetrates through the top wall of the reaction kettle and extends downwards, and the first feeding pipe and the second feeding pipe are arranged on the rotary drum. A speed reducing motor is arranged outside the reaction kettle, an output shaft of the speed reducing motor is in transmission connection with the upper end of the rotary drum, two mother pipes are arranged inside the reaction kettle, the two mother pipes are arranged on the left side and the right side of the rotary drum respectively and communicated with the rotary drum, a plurality of spray heads are arranged at the bottom of each mother pipe, and a discharging opening is formed in the bottom of the reaction kettle. The outlet end of the first feeding pipe is arranged in the rotary drum in a penetrating manner, and the second feeding pipe is communicated with the reaction kettle. According to the utility model, a cross-linking agent can be uniformly sprayed into N-vinylpyrrolidone, so that the cross-linking agent and the N-vinylpyrrolidone can be quickly and uniformly mixed, the reaction efficiency is improved, and the product quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical production equipment, and specifically relates to a feeding mechanism and a PVPP synthesis device. Background Art

[0002] Cross-linked polyvinyl pyrrolidone (PVPP for short) is a white or nearly white, hygroscopic and easy-flowing powder, odorless or slightly odorous, insoluble in water, alkali, acid and common organic solvents, with strong swelling properties and complexing ability with many types of substances. Its water absorption capacity can reach several times or even dozens of times its own weight, and hydrogen bonds can be formed between the matrix and the adsorbed water, so that the adsorbed water will not be lost even under a certain pressure. Due to the excellent physiological safety, water absorption, water insolubility, complexing and other excellent properties of PVPP, it has broad application prospects in the fields of medicine and food.

[0003] The traditional preparation method of PVPP is popcorn polymerization, in which N-vinyl pyrrolidone (NVP) monomer is cross-linked and polymerized by adding a cross-linking agent in a high temperature, high pressure, oxygen-free, and strong alkaline environment. Currently, in the process of preparing PVPP, the mixing of NVP monomer and cross-linking agent will be uneven, resulting in low reaction efficiency and affecting product quality.

[0004] Therefore, improvements are urgently needed. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a feeding mechanism and a PVPP synthesis device. Through the design of the first feeding pipe, the second feeding pipe, the mother pipe, the nozzle, the reduction motor and the stirring assembly, the cross-linking agent can be evenly sprayed into the N-vinyl pyrrolidone, so as to promote the rapid and uniform mixing of the two, improve the reaction efficiency, and improve the product quality. In addition, the amount of the cross-linking agent used can be controlled by the guide assembly; when the reaction is completed, if blockage occurs, the discharge port of the reactor can be unblocked by the unblocking assembly to effectively solve the blockage problem.

[0006] In the first aspect, an embodiment of the utility model provides a feeding mechanism, including a reactor, a first feeding pipe for conveying a cross-linking agent and a second feeding pipe for conveying N-vinylpyrrolidone, a rotating drum is arranged on the top of the reactor, the rotating drum is arranged vertically, the bottom end of the rotating drum is a blind end, the bottom end of the rotating drum passes through the top wall of the reactor and extends downward, and the rotating drum and the reactor are sealed and rotatably connected, a reduction motor is arranged on the outside of the reactor, and the output shaft of the reduction motor is transmission-connected to the upper end of the rotating drum through a bevel gear transmission pair, two mother pipes are arranged inside the reactor, the two mother pipes are arranged on the left and right sides of the rotating drum, and the mother pipes are connected to the rotating drum, a plurality of nozzles are arranged at the bottom of each mother pipe, and a discharge port is arranged at the bottom of the reactor, the outlet end of the first feeding pipe is penetrated into the inside of the rotating drum, and the first feeding pipe and the rotating drum are sealed and rotatably connected, and the second feeding pipe is connected to the reactor.

[0007] Optionally, a booster pump and a guide assembly are also provided on the first feeding pipe, and the guide assembly includes a circular baffle and a servo motor. The circular baffle is vertically arranged inside the first feeding pipe, and the shape of the circular baffle matches the inner wall of the first feeding pipe. The servo motor is fixedly arranged outside the first feeding pipe, and the output shaft of the servo motor is transmission-connected with a rotating shaft, which passes through the tube wall of the first feeding pipe and is fixedly connected to the top of the circular baffle.

[0008] Specifically, when the servo motor drives the circular baffle to rotate to be perpendicular to the flow direction of the material in the first feeding pipe, it is closed; when the servo motor drives the circular baffle to rotate to be parallel to the flow direction of the material in the first feeding pipe, it is turned on; the flow rate can also be controlled by controlling the size of the circular baffle angle through the servo motor.

[0009] Optionally, a ball valve is also provided on the second feeding pipe.

[0010] Optionally, the bevel gear transmission pair includes a meshing vertical bevel gear and a horizontal bevel gear, the vertical bevel gear is fixed on the output shaft of the reduction motor, and the horizontal bevel gear is fixedly sleeved on the outside of the drum.

[0011] In a second aspect, an embodiment of the utility model provides a PVPP synthesis device, and the PVPP synthesis device includes the above-mentioned feeding mechanism.

[0012] Optionally, an air inlet and an air outlet are further provided on the top of the reactor, a pressure gauge and a safety valve are provided on the shell of the reactor, a heating jacket is provided on the outer wall of the reactor, and a discharge valve is provided at the discharge port of the reactor.

[0013] Optionally, a stirring assembly is provided inside the reactor, and the stirring assembly includes a stirring shaft fixedly connected to the bottom of the rotating drum and a plurality of stirring rods arranged on the stirring shaft.

[0014] Optionally, a dredging assembly is provided below the discharge port of the reactor, and the dredging assembly includes a base plate, a driving motor, a rotating rod, a cam, a support plate and a dredging rod. The driving motor is mounted on the base plate, the rotating rod is drivingly connected to the output shaft of the driving motor, the cam is fixed on the rotating rod, the support plate is located above the driving motor and the cam, a guide rod is provided between the support plate and the base plate, a roller for abutting the cam is provided at the bottom of the support plate, the dredging rod is fixed on the top surface of the support plate and corresponds to the position of the discharge port of the reactor, and a pointed cone is provided on the top of the dredging rod.

[0015] Specifically, since the finished product of the reaction is powder, the discharge port of the reactor is easily blocked, making discharge difficult. At this time, the drive motor can be started to drive the rotating rod to rotate, and then drive the cam to rotate. The cam periodically pushes the support plate up and down, so that the guide rod can clear the discharge port of the reactor, effectively solving the blockage problem.

[0016] The utility model also includes other components that enable a feeding mechanism and a PVPP synthesis device to be used normally, which are all conventional technical means in the art. In addition, the devices or components not limited in the utility model all adopt conventional technical means in the art, such as pressure gauges, safety valves, reduction motors, drive motors and servo motors.

[0017] The working principle of the utility model is that when in use, the reactor is first evacuated, and then N-vinyl pyrrolidone is introduced into the reactor through the second feeding pipe, and the reduction motor is started to drive the rotating drum to rotate, and at the same time, a cross-linking agent is introduced into the first feeding pipe. As the rotating drum rotates, the cross-linking agent is evenly sprayed out and mixed under the stirring of the stirring rod, and then nitrogen is introduced to pressurize and heat to start a cross-linking polymerization reaction; after the reaction is completed, the liquid material in the reactor is converted into powder and discharged through the discharge port. If blockage occurs, the drive motor can be started to clear the discharge port.

[0018] The beneficial effect of the utility model is that, through the design of the first feeding pipe, the second feeding pipe, the mother pipe, the nozzle, the reduction motor and the stirring component, the cross-linking agent can be evenly sprayed into the N-vinyl pyrrolidone, so as to promote the rapid and uniform mixing of the two, improve the reaction efficiency, and improve the product quality. In addition, the flow guide component can be used to control the amount of cross-linking agent used; when the reaction is completed, if blockage occurs, the discharge port of the reactor can be unblocked by the unblocking component, so as to effectively solve the blockage problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 A structural schematic diagram of a feeding mechanism provided in an embodiment of the utility model.

[0021] Figure 2A schematic structural diagram of a flow guide assembly of a feeding mechanism provided in an embodiment of the utility model.

[0022] Figure 3 A schematic structural diagram of a PVPP synthesis device provided in an embodiment of the utility model.

[0023] Figure 4 A schematic diagram of the partial structure of a dredging component of a PVPP synthesis device provided in an embodiment of the utility model.

[0024] In the figure: 1. reactor, 2. first feed pipe, 3. second feed pipe, 4. drum, 5. reduction motor, 6. bevel gear transmission pair, 7. main pipe, 8. nozzle, 9. discharge port, 10. booster pump, 11. flow guide assembly, 12. circular baffle, 13. servo motor, 14. shaft, 15. ball valve, 16. air inlet, 17. air outlet, 18. pressure gauge, 19. safety valve, 20. heating jacket, 21. discharge valve, 22. stirring assembly, 23. dredging assembly, 24. bottom plate, 25. drive motor, 26. rotating rod, 27. cam, 28. support plate, 29. dredging rod, 30. guide rod, 31. roller. DETAILED DESCRIPTION

[0025] The present invention is described in detail below in conjunction with the drawings and specific embodiments in the embodiments of the present invention. The description here is only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work, any modifications, equivalent replacements, improvements, etc., should be included in the protection scope of the present invention.

[0026] Example

[0027] like Figure 1 and Figure 2As shown, an embodiment of the utility model provides a feeding mechanism, including a reactor 1, a first feeding pipe 2 for conveying a cross-linking agent, and a second feeding pipe 3 for conveying N-vinyl pyrrolidone. A rotating drum 4 is arranged on the top of the reactor 1, and the rotating drum 4 is arranged vertically. The bottom end of the rotating drum 4 is a blind end, and the bottom end of the rotating drum 4 passes through the top wall of the reactor 1 and extends downward, and the rotating drum 4 and the reactor 1 are sealed and rotatably connected. A reduction motor 5 is arranged outside the reactor 1, and the output shaft of the reduction motor 5 is transmission-connected to the upper end of the rotating drum 4 through a bevel gear transmission pair 6. Two mother pipes 7 are arranged inside the reactor 1, and the two mother pipes 7 are arranged on the left and right sides of the rotating drum 4, and the mother pipes 7 are connected to the rotating drum 4. A plurality of nozzles 8 are arranged at the bottom of each mother pipe 7. A discharge port 9 is arranged at the bottom of the reactor 1, and the outlet end of the first feeding pipe 2 is penetrated inside the rotating drum 4, and the first feeding pipe 2 and the rotating drum 4 are sealed and rotatably connected, and the second feeding pipe 3 is connected to the reactor 1.

[0028] The first feeding pipe 2 is also provided with a booster pump 10 and a flow guide component 11. The flow guide component 11 includes a circular baffle 12 and a servo motor 13. The circular baffle 12 is vertically arranged inside the first feeding pipe 2, and the shape of the circular baffle 12 matches the inner wall of the first feeding pipe 2. The servo motor 13 is fixedly arranged outside the first feeding pipe 2. The output shaft of the servo motor 13 is transmission-connected with a rotating shaft 14. The rotating shaft 14 passes through the pipe wall of the first feeding pipe 2 and is fixedly connected to the top of the circular baffle 12.

[0029] It can be understood that when the servo motor 13 drives the circular baffle 12 to rotate to be perpendicular to the flow direction of the material in the first feeding pipe 2, it is turned off; when the servo motor 13 drives the circular baffle 12 to rotate to be parallel to the flow direction of the material in the first feeding pipe 2, it is turned on; the servo motor 13 can also control the size of the rotation angle of the circular baffle 12 to control the flow rate.

[0030] The second feeding pipe 3 is also provided with a ball valve 15 .

[0031] The bevel gear transmission pair 6 includes a meshing vertical bevel gear and a horizontal bevel gear. The vertical bevel gear is fixed on the output shaft of the reduction motor 5 , and the horizontal bevel gear is fixedly sleeved on the outside of the rotating drum 4 .

[0032] Combination Figure 3 and Figure 4 As shown, an embodiment of the utility model further provides a PVPP synthesis device, which includes the feeding mechanism mentioned in the above embodiment.

[0033] The top of the reactor 1 is also provided with an air inlet 16 and an air outlet 17 , the shell of the reactor 1 is provided with a pressure gauge 18 and a safety valve 19 , the outer wall of the reactor 1 is provided with a heating jacket 20 , and the discharge port 9 of the reactor 1 is provided with a discharge valve 21 .

[0034] A stirring assembly 22 is arranged inside the reactor 1. The stirring assembly 22 includes a stirring shaft fixedly connected to the bottom of the drum 4 and a plurality of stirring rods arranged on the stirring shaft.

[0035] A dredging assembly 23 is provided below the discharge port 9 of the reactor 1. The dredging assembly 23 includes a base plate 24, a drive motor 25, a rotating rod 26, a cam 27, a support plate 28 and a dredging rod 29. The drive motor 25 is installed on the base plate 24, the rotating rod 26 is transmission-connected to the output shaft of the drive motor 25, the cam 27 is fixed on the rotating rod 26, the support plate 28 is located above the drive motor 25 and the cam 27, a guide rod 30 is provided between the support plate 28 and the base plate 24, a roller 31 for abutting the cam 27 is provided at the bottom of the support plate 28, the dredging rod 29 is fixed on the top surface of the support plate 28 and corresponds to the position of the discharge port 9 of the reactor 1, and a pointed cone is provided at the top of the dredging rod 29.

[0036] It is understandable that since the finished reaction product is a powder, the discharge port 9 of the reactor 1 is easily blocked, making discharge difficult. At this time, the drive motor 25 can be started to drive the rotating rod 26 to rotate, and then drive the cam 27 to rotate. The cam 27 periodically pushes the support plate 28 up and down, so that the guide rod 29 can clear the discharge port 9 of the reactor 1, effectively solving the blockage problem.

[0037] The working principle of the utility model is that when in use, the reactor 1 is first evacuated, and then N-vinyl pyrrolidone is introduced into the reactor 1 through the second feeding pipe 3, and the reduction motor 5 is started to drive the drum 4 to rotate, and at the same time, a cross-linking agent is introduced into the first feeding pipe 2. As the drum 4 rotates, the cross-linking agent is evenly sprayed out and mixed under the stirring of the stirring rod, and then nitrogen is passed through to pressurize and heat to start a cross-linking polymerization reaction; after the reaction is completed, the liquid material in the reactor 1 becomes a powder material and is discharged through the discharge port 9. If blockage occurs, the drive motor 25 can be started to clear the discharge port 9.

[0038] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A feeding mechanism, comprising a reaction kettle, a first feeding pipe for conveying a cross-linking agent and a second feeding pipe for conveying N-vinyl pyrrolidone, characterized in that: A rotating drum is arranged on the top of the reactor. The rotating drum is arranged vertically, and the bottom end of the rotating drum is a blind end. The bottom end of the rotating drum passes through the top wall of the reactor and extends downward, and the rotating drum and the reactor are sealed and rotatably connected. A reduction motor is arranged on the outside of the reactor, and the output shaft of the reduction motor is transmission-connected to the upper end of the rotating drum through a bevel gear transmission pair. Two mother pipes are arranged inside the reactor, and the two mother pipes are arranged on the left and right sides of the rotating drum, and the mother pipes are connected to the rotating drum. A plurality of nozzles are arranged at the bottom of each mother pipe, and a discharge port is arranged at the bottom of the reactor, and the outlet end of the first feeding pipe is passed through the inside of the rotating drum, and the first feeding pipe and the rotating drum are sealed and rotatably connected, and the second feeding pipe is connected to the reactor.

2. The feeding mechanism according to claim 1, characterized in that: A booster pump and a guide assembly are also provided on the first feeding pipe. The guide assembly includes a circular baffle and a servo motor. The circular baffle is vertically arranged inside the first feeding pipe, and the shape of the circular baffle matches the inner wall of the first feeding pipe. The servo motor is fixedly arranged outside the first feeding pipe. The output shaft of the servo motor is transmission-connected with a rotating shaft, which passes through the tube wall of the first feeding pipe and is fixedly connected to the top of the circular baffle.

3. The feeding mechanism according to claim 2, characterized in that: The second feeding pipe is also provided with a ball valve.

4. The feeding mechanism according to claim 3, characterized in that: The bevel gear transmission pair comprises a meshing vertical bevel gear and a horizontal bevel gear. The vertical bevel gear is fixed on the output shaft of the reduction motor, and the horizontal bevel gear is fixedly sleeved on the outside of the rotating drum.

5. A PVPP synthesis device, characterized in that: The feeding mechanism comprises the feeding mechanism described in any one of claims 1 to 4 above.

6. The PVPP synthesis device according to claim 5, characterized in that: The top of the reactor is also provided with an air inlet and an air outlet, the shell of the reactor is provided with a pressure gauge and a safety valve, the outer wall of the reactor is provided with a heating jacket, and the discharge port of the reactor is provided with a discharge valve.

7. The PVPP synthesis device according to claim 6, characterized in that: A stirring assembly is arranged inside the reaction kettle, and the stirring assembly comprises a stirring shaft fixedly connected to the bottom of the rotating drum and a plurality of stirring rods arranged on the stirring shaft.

8. The PVPP synthesis device according to claim 7, characterized in that: A dredging assembly is arranged below the discharge port of the reactor, and the dredging assembly includes a base plate, a driving motor, a rotating rod, a cam, a support plate and a dredging rod. The driving motor is mounted on the base plate, the rotating rod is transmission-connected to the output shaft of the driving motor, the cam is fixed on the rotating rod, the support plate is located above the driving motor and the cam, a guide rod is arranged between the support plate and the base plate, a roller for abutting the cam is arranged at the bottom of the support plate, the dredging rod is fixed on the top surface of the support plate and corresponds to the position of the discharge port of the reactor, and a pointed cone is arranged on the top of the dredging rod.

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