CN116328659B - Feeding system for polyimide film production - Google Patents
Feeding system for polyimide film production Download PDFInfo
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- CN116328659B CN116328659B CN202310613131.6A CN202310613131A CN116328659B CN 116328659 B CN116328659 B CN 116328659B CN 202310613131 A CN202310613131 A CN 202310613131A CN 116328659 B CN116328659 B CN 116328659B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
- B01J4/007—Feed or outlet devices as such, e.g. feeding tubes provided with moving parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/008—Feed or outlet control devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/02—Feed or outlet devices; Feed or outlet control devices for feeding measured, i.e. prescribed quantities of reagents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/0436—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes provided with mechanical cleaning tools, e.g. scrapers, with or without additional fluid jets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2204/00—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices
- B01J2204/002—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices the feeding side being of particular interest
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2204/00—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices
- B01J2204/005—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices the outlet side being of particular interest
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The application relates to the technical field of polyimide film production, in particular to a feeding system for polyimide film production, which comprises a feeding mechanism, a reaction kettle and a feeding pipe communicated with the reaction kettle and the feeding mechanism, wherein the feeding pipe is provided with a pushing mechanism, the pushing mechanism comprises a pushing pipe arranged on one side of the feeding pipe, the inner diameter of the pushing pipe is the same as that of the feeding pipe, one end of the pushing pipe is communicated with the inside of the feeding pipe, the pushing pipe and the feeding pipe are integrally of a Y-shaped structure, a pushing plug matched with the pushing pipe is arranged in the pushing pipe, and a pushing cylinder for driving the pushing plug to reciprocate in the pushing pipe and the inside of the feeding pipe is arranged on the pushing pipe, so that the effects of reducing the residue of raw materials in the feeding pipe, reducing the possibility of blockage of the feeding pipe and guaranteeing the performance of a polyimide film are achieved.
Description
Technical Field
The application relates to the technical field of polyimide film production, in particular to a feeding system for polyimide film production.
Background
The polyimide film is a novel high-temperature-resistant organic polymer film, is one of the earliest polyimide application products, is the film insulating material with the best performance in the world, and has excellent mechanical property, electrical property, chemical stability, high radiation resistance, high temperature resistance and low temperature resistance.
The Chinese patent with publication number of CN109366826A discloses a production process of a polyimide film by a casting method, which relates to the technical field of polyimide film production and comprises the following steps: adding a solvent N, N-dimethylacetamide into a reaction kettle, and simultaneously adding p-phenylenediamine for dissolution, wherein the heating temperature is 40 ℃; after the p-phenylenediamine is completely dissolved, slowly adding 3,3', 4' -biphenyl tetracarboxylic anhydride with the same molar ratio as the p-phenylenediamine, reducing the temperature to 10 ℃, introducing nitrogen when the pole climbing phenomenon occurs to the viscosity, and reacting for 8 hours to obtain polyamide acid; placing the polyamic acid into a dryer, and carrying out vacuum defoaming treatment on the polyamic acid slurry by adopting a vacuum pump; after defoaming, carrying out steel belt casting to obtain a polyamic acid solid film; performing multistage drying treatment on the polyamic acid solid film; and (3) carrying out imidization treatment by adopting multi-stage temperature programming to prepare the polyimide film.
The prior art solutions described above have the following drawbacks: in the actual production of polyimide films, in order to improve the automation degree of a production line, raw materials are often added into a feeding mechanism, and the feeding mechanism conveys the raw materials into a reaction kettle through a feeding pipe communicated with the reaction kettle; because the temperature in the reaction kettle is higher during polyimide film production, steam generated at a high temperature can enter the feed pipe, raw materials and steam can be mixed to enable the raw materials to have certain viscosity, so that part of raw materials can be adhered to the inner wall of the feed pipe, the formula of the raw materials can be changed, the performance of the polyimide film is influenced finally, and the pipeline is blocked when serious, so that the feeding process of the raw materials is influenced.
Disclosure of Invention
The application provides a feeding system for producing polyimide films, which aims to reduce the residue of raw materials in a feeding pipe, reduce the possibility of blocking the feeding pipe and ensure the performance of polyimide films.
The technical aim of the application is realized by the following technical scheme:
the utility model provides a feeding system for polyimide film production, including feeding mechanism, reation kettle and both ends respectively with reation kettle, feeding mechanism UNICOM's feed tube, be provided with pushing equipment on the feed tube, one side that pushing equipment includes the feed tube is provided with the ejector sleeve, the internal diameter of ejector sleeve is the same with the feed tube internal diameter, the one end and the inside UNICOM of feed tube of ejector sleeve, the ejector sleeve wholly is Y type structure with the feed tube, the ejector sleeve is inside to be provided with the ejector plug with ejector sleeve looks adaptation, be provided with on the ejector sleeve and drive the ejector plug and push away the cylinder at ejector sleeve and the inside reciprocating motion of feed tube.
Through adopting above-mentioned scheme, feeding mechanism can carry the reation kettle with raw and other materials through the feed pipe in, if the material has appeared in the feed pipe and has remained, promotes the cylinder and starts, promotes the cylinder and drives the plug and move down, can enter into the feed pipe in the end, pushes away plug and feed pipe, the material looks adaptation of pushing away the feed pipe, the plug can be with the material propelling movement of bonding on the feed pipe inner wall to reation kettle in, just so can reduce the residue of raw materials in the feed pipe, reduces the possibility that the feed pipe appears blockking up.
Preferably, a blast pipe is arranged outside the pushing pipe, one end of the blast pipe extends to the inside of the pushing pipe and is communicated with the inside of the feeding pipe, and one end of the blast pipe, which is far away from the pushing pipe, is connected with a blower.
Preferably, the feeding mechanism comprises a feeding hopper, a screw conveyor is arranged below the feeding hopper, the feeding hopper is communicated with a feeding port of the screw conveyor at the position of the lower end face, and a discharging port of the screw conveyor is communicated with an upper end head of a feeding pipe of the reaction kettle.
Preferably, a weighing hopper is connected between the upper end head of the feeding pipe and the discharge port of the screw conveyor, the upper port of the weighing hopper is open and is communicated with the discharge port of the screw conveyor, a supporting frame is arranged on the outer side of the weighing hopper, and a weight pressure sensor for conveying materials in the weighing hopper is arranged on the supporting frame.
Preferably, the feeding mechanism comprises a feeding barrel, a conveying pipe is connected to the feeding barrel, one end, far away from the feeding barrel, of the conveying pipe is communicated with the upper end head of the feeding pipe, and a feeding pump and a first throttle valve are arranged on the conveying pipe.
Preferably, the conveying pipe is further provided with a second throttle valve, and the second throttle valve is located at one end of the first throttle valve, which is close to the feed barrel.
Preferably, the reaction kettle is also connected with a defoaming kettle, a communication pipe is arranged between the reaction kettle and the defoaming kettle, and a rotor pump is arranged on the communication pipe.
Preferably, a vertical measuring rod is arranged in the reaction kettle, a resistance sensor is arranged at the lower end of the measuring rod, and the resistance sensor is coupled with a control center.
Preferably, the circumferential surface of the pushing plug is sleeved with an annular sealing air bag which is abutted against the inner wall of the pushing pipe, the sealing air bag is embedded into the circumferential surface of the pushing plug, one side, close to the pushing cylinder 44, of the pushing plug is provided with an air pipe, two ends of the air pipe are communicated with the interior of the sealing air bag, and an auxiliary piece for changing the total volume of the sealing air bag and the interior of the air pipe is arranged on the air pipe.
Preferably, the auxiliary piece is including setting up on the trachea and with tracheal lateral wall sliding connection's auxiliary stopper, the position that is close to upper and lower both ends face on the auxiliary stopper external surface is provided with the snap ring, the up end of auxiliary stopper and the piston rod fixed connection of promotion cylinder, still overlap on the piston rod of promotion cylinder and be equipped with the go-between the same with auxiliary stopper structure, the go-between outside is provided with the lantern ring, the go-between passes from the lantern ring and both sliding connection, lantern ring and pushing away material stopper fixed connection.
In summary, the application has the following technical effects:
1. by arranging the pushing mechanism, when raw materials remain in the feeding pipe, the pushing mechanism can push the raw materials on the wall of the feeding pipe into the reaction kettle, so that the residues of the raw materials on the feeding pipe can be reduced, and the possibility of blockage of the feeding pipe is reduced;
2. by arranging the blast pipe and the blower, the blower blows air into the feed pipe through the blast pipe, so that the blanking speed of raw materials in the feed pipe can be increased, the residence time of the raw materials in the feed pipe can be reduced, and the amount of materials adhered in the feed pipe can be reduced;
3. through having set up the rotor pump, the rotor pump can control the material volume that reation kettle entered into in the defoaming cauldron, carries out accurate control to the material volume.
Drawings
FIG. 1 is an overall block diagram of a feed system in an embodiment of the application;
FIG. 2 is a partial cross-sectional view showing the internal structure of the feed pipe and the feed pipe in an embodiment of the present application;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is a control flow diagram of a control center in an embodiment of the application;
fig. 5 is an overall structure diagram of a feeding mechanism according to another embodiment of the present application.
In the figure, 1, a feeding mechanism; 11. a hopper; 12. a fixing frame; 13. a screw conveyor; 14. weighing hopper; 15. a support frame; 16. a pressure sensor; 17. a control center; 18. a display; 2. a reaction kettle; 3. a feed pipe; 4. a pushing mechanism; 41. a material pushing pipe; 42. pushing the material plug; 43. a seal assembly; 431. sealing the air bag; 432. an air pipe; 433. an auxiliary member; 434. an auxiliary plug; 435. a clasp; 436. a collar; 437. a connecting ring; 438. a connecting frame; 44. a pushing cylinder; 51. a feed barrel; 52. a feed pump; 53. a delivery tube; 54. a first flowmeter; 55. a second flowmeter; 56. a first throttle valve; 57. a second throttle valve; 6. a defoaming kettle; 61. a communicating pipe; 62. a rotor pump; 7. a measuring rod; 71. a resistance sensor; 8. a blast pipe; 81. a blower.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the application provides a feeding system for producing polyimide films, which comprises a feeding mechanism 1, a reaction kettle 2, a feeding pipe 3 and a pushing mechanism 4, wherein the reaction kettle 2 is used for stirring and mixing materials, the feeding pipe 3 is vertically arranged above the reaction kettle 2, the lower end of the feeding pipe 3 extends downwards to penetrate through the upper cover of the reaction kettle 2 and then extends into the reaction kettle 2 to be communicated with the interior of the reaction kettle 2, the feeding mechanism 1 is arranged on one side of the reaction kettle 2 and is communicated with the upper end of the feeding pipe 3, and the pushing mechanism 4 is arranged on the feeding pipe 3.
When the feeding system works, people add raw materials for manufacturing polyimide films into the feeding mechanism 1, the feeding mechanism 1 automatically conveys the raw materials into the feeding pipe 3, and finally falls into the reaction kettle 2; along with the longer service life of the feeding system, because of the high-temperature steam generated in the reaction kettle 2, more raw materials and viscous mixture of aqueous solution can adhere to the inner wall of the feeding pipe 3, so that the feeding pipe 3 can be blocked after a long time, and at the moment, the materials adhered to the inner wall of the feeding pipe 3 can be pushed into the reaction kettle 2 through the pushing mechanism 4, so that the effects of reducing the residues of raw materials in the feeding pipe and reducing the possibility of blocking the feeding pipe are achieved.
Referring to fig. 2 and 3, the pushing mechanism 4 includes a pushing tube 41, a pushing plug 42, a sealing assembly 43 and a pushing cylinder 44, wherein the pushing tube 41 is disposed at one side of the feeding tube 3, an angle exists between the pushing tube 41 and the vertical direction, and the angle is smaller than 20 degrees, the lower end of the pushing tube 41 extends towards the direction close to the feeding tube 3 and is finally communicated with the inside of the feeding tube 3, the feeding tube 3 and the pushing tube 41 are integrally in a Y-shaped structure, and the inner diameter of the pushing tube 41 is identical to the inner diameter and the outer diameter of the feeding tube 3; the pushing plug 42 is arranged inside the pushing tube 41, the pushing plug 42 is matched with the inner wall of the pushing tube 41, and the sealing component 43 is arranged on the pushing plug 42 and can improve the tightness between the pushing plug 42 and the pushing tube 41 or the feeding tube 3; a pushing cylinder 44 is fixed to the upper end of the pushing tube 41, and a piston rod of the pushing cylinder 44 extends downward into the pushing tube 41 and is connected to the pushing plug 42.
When the inner wall of the feed pipe 3 is stuck with a part of raw materials to be cleaned, the pushing cylinder 44 is started, the pushing cylinder 44 drives the pushing plug 42 to move downwards, and finally the raw materials can enter the feed pipe 3, the pushing plug 42 is matched with the feed pipe 3 and the pushing pipe 41, and the pushing plug 42 pushes the materials stuck on the inner wall of the feed pipe 3 into the reaction kettle 2, so that the residues of the raw materials in the feed pipe 3 can be reduced, and the possibility of blocking the feed pipe 3 is reduced.
Referring to fig. 3, the sealing assembly 43 includes a sealing balloon 431, an air pipe 432, and an auxiliary 433, the sealing balloon 431 is sleeved on the circumferential surface of the plunger 42 and is embedded inside the circumferential surface of the plunger 42, and the outermost side of the sealing balloon 431 may be abutted against the inner surface of the plunger 41; the air tube 432 is arranged above the pushing plug 42, two ends of the air tube 432 are communicated with the inside of the sealing air bag 431, and the auxiliary member 433 is arranged on the pushing plug 42 and can change the integral volume of the sealing air bag 431 and the inside of the air tube 432;
in this embodiment, the auxiliary member 433 includes an auxiliary plug 434, a snap ring 435, a collar 436, a connection ring 437 and a connection frame 438, a jack is formed on the air tube 432, the jack is formed in a direction away from the pushing plug 42, the auxiliary plug 434 is installed inside the jack for sealing the jack, the auxiliary plug 434 is slidably connected with a side wall of the air tube 432, and one end of the auxiliary plug 434, which is close to a piston rod of the pushing cylinder 44, is fixedly connected with the piston rod; the two clamping rings 435 are arranged in total, and the two clamping rings 435 are sleeved on the auxiliary plug 434 at positions close to two ends of the auxiliary plug 434; the collar 436 is generally similar in structure to the auxiliary plug 434, and specifically: the collar 436 is of an amplified structure of the auxiliary plug 434 in equal proportion, the collar 436 is sleeved on the end of the piston rod of the pushing cylinder 44, the connecting ring 437 is sleeved on the outer side of the collar 436, the collar 436 is in sliding connection with the connecting ring 437, and the connecting frame 438 is arranged between the connecting ring 437 and the pushing plug 42; here, when the collar 436 moves in a direction away from the plunger 42 to abut against the connection ring 437, the collar 435 on the auxiliary plug 434, which is close to the plunger 42, abuts against the inner surface of the air tube 432, and when the collar 436 moves in a direction close to the plunger 42 to abut against the connection ring 437, the collar 435 on the auxiliary plug 434, which is far from the plunger 42, abuts against the outer surface of the air tube 432.
When the raw materials adhered to the inner wall of the feed pipe 3 need to be cleaned, the pushing cylinder 44 drives the lantern ring 436 to move in the direction of approaching the pushing plug 42 in the connecting ring 437, and at the moment, the pushing cylinder 44 also drives the auxiliary plug 434 to move in the direction of approaching the air pipe 432, so that the total volume of the air pipe 432 and the sealing air bag 431 is reduced, the sealing air bag 431 is inflated, and the outermost side of the sealing air bag 431 is close to the inner surface of the feed pipe 3; when the lantern ring 436 is abutted against the connecting ring 437, the clamping ring 435 on the auxiliary plug 434 is just abutted against the side wall of the air pipe 432, so that the piston rod of the air cylinder 44 is pushed to move continuously, the pushing plug 42 and the sealing air bag 431 also move continuously in the feeding pipe 3, and the purpose of cleaning the raw materials adhered on the inner wall of the feeding pipe 3 is achieved; in contrast, when the piston rod of the pushing cylinder 44 is retracted, the total volume of the sealing air bag 431 and the air pipe 432 is increased, and the sealing air bag 431 is retracted, so that the friction force between the sealing air bag 431 and the feeding pipe 3 or the inner wall of the pushing pipe 41 when the piston rod of the pushing cylinder 44 is retracted can be reduced, the abrasion of the sealing air bag 431 can be reduced, and the service life of the sealing air bag 431 can be prolonged.
Referring to fig. 1 and 2, in the present embodiment, in order to increase the falling speed of the material in the feed pipe 3, a blower pipe 8 is disposed outside the push pipe 41, one end of the blower pipe 8 extends into the push pipe 41, extends downward through the push plug 42, and then extends into the feed pipe 3, and one end of the blower pipe 8 away from the push pipe 41 is connected with a blower 81.
Referring to fig. 1 and 4, in the present embodiment, a charging mechanism 1 includes a hopper 11, a fixing frame 12, a screw conveyor 13, a weighing hopper 14, a supporting frame 15, a pressure sensor 16, a control center 17, and a display 18, the hopper 11 is disposed at one side of a reaction kettle 2, and the fixing frame 12 is disposed below the hopper 11 for supporting the hopper 11; the weighing hopper 14 is arranged above the feed pipe 3, a discharge port of the weighing hopper 14 is communicated with an upper end head of the feed pipe 3, the supporting frame 15 is arranged below the weighing hopper 14 and used for supporting the weighing hopper 14, the pressure sensor 16 is fixed on the supporting frame 15 and is in contact with the weighing hopper 14, the control center 17 and the display 18 are both fixed on the supporting frame 15, the pressure sensor 16 is coupled with the control center 17, and the control center 17 is coupled with the display 18; the screw conveyer 13 sets up between loading hopper 11 and weighing hopper 14, and the discharge gate of loading hopper 11 below and the pan feeding mouth UNICOM of screw conveyer 13, and the discharge gate of screw conveyer 13 is located weighing hopper 14 top and with weighing hopper 14 inside UNICOM.
The materials added into the reaction kettle 2 need to be accurately quantified, the raw materials are added into the feeding hopper 11 by people, the height of the feeding hopper 11 is lower than the height of the highest point of the feeding pipe 3 and the weighing hopper 14, and the feeding hopper 11 can facilitate the addition of the materials by people; the materials in the hopper 11 drop into the screw conveyor 13, the screw conveyor 13 conveys the materials into the weighing hopper 14 for weighing, specifically, after the materials drop into the weighing hopper 14, the pressure of the pressure sensor 16 is changed by the weighing hopper 14, the pressure sensor 16 conveys the received pressure to the control center 17, after the control center 17 analyzes the pressure data, the pressure data are converted into weight and displayed on the display 18, and people can determine whether the required material quantity reaches the user or not through the data displayed on the display 18; finally, after the material quantity in the charging hopper 11 reaches the required requirement, the material in the charging hopper 11 falls into the reaction kettle 2 through the feeding pipe 3, and the charging process of the reaction kettle 2 is completed.
It should be noted that, in this embodiment, the control center 17 is a single-chip microcomputer, and other control centers 17 with the same effects are still applicable.
The feeding mechanism 1 in this embodiment is mainly used for feeding solid or crystal raw materials, and in other embodiments, the feeding mechanism 1 is mainly used for conveying liquid materials, which specifically is as follows: referring to fig. 5, the charging mechanism 1 includes a feed bucket 51, a feed pump 52, a delivery pipe 53, a first flow meter 54, a second flow meter 55, a first throttle valve 56, and a second throttle valve 57, the feed bucket 51 being provided at one side of the reaction kettle 2 for containing liquid materials; one end of a conveying pipe 53 is communicated with a feed barrel 51, the other end of the conveying pipe extends to the direction approaching the reaction kettle 2 and is finally communicated with the upper end of a feed pipe 3, a feed pump 52 is arranged on the conveying pipe 53, and a first flowmeter 54 and a second flowmeter 55 are sequentially arranged on the conveying pipe 53 along the direction from far to near the feed barrel 51; the first throttle valve 56 and the second throttle valve 57 are mounted on the delivery pipe 53 in this order in a direction from the far side to the near side of the feed bucket 51.
For the liquid raw materials, the raw materials are added into the feed barrel 51, the feed pump 52 can convey the liquid raw materials in the feed barrel 51 into the feed pipe 3, and finally the liquid raw materials fall into the reaction kettle 2 to finish the raw material supply process; the first flowmeter 54 and the second flowmeter 55 on the conveying pipe 53 can meter the material quantity added into the reaction kettle 2, and a mutual calibration function exists between the first flowmeter 54 and the second flowmeter 55, so that the material supply quantity is more accurate; the first throttle valve 56 and the second throttle valve 57 are mainly used for controlling the on-off of the conveying pipe 53, and mutual protection exists between the two throttle valves, so that the possibility of breakage of the conveying pipe 53 caused by overlarge pressure in the conveying pipe 53 can be reduced.
Referring to fig. 1, further, in the production of the polyimide film, the raw materials are stirred and mixed in the reaction kettle 2, a defoaming kettle 6 is arranged at the downstream of the reaction kettle 2, a communication pipe 61 is arranged between the defoaming kettle 6 and the reaction kettle 2, and a rotor pump 62 is arranged on the communication pipe 61. The amount of the material in the reaction kettle 2 moving into the defoaming kettle 6 also needs to be measured, and the rotor pump 62 can accurately control the amount of the material during the movement.
Referring to fig. 5, still further, a vertical measuring rod 7 is provided at the center of the reaction kettle 2, a resistance sensor 71 is provided at the lower end of the measuring rod 7, and the resistance sensor 71 is coupled with the control center 17; the resistance sensor 71 is mainly used for detecting the quantity of materials in the reaction kettle 2 and transmitting the quantity of the residual materials in the reaction kettle 2 to the control center 17 at any time, so that the detection of people can be facilitated, and the possibility of empty kettles in the reaction kettle 2 is reduced.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (6)
1. The utility model provides a polyimide film production is with feeding system, includes feeding mechanism (1), reation kettle (2) and both ends respectively with reation kettle (2), feed pipe (3) of feeding mechanism (1) UNICOM, its characterized in that: the feeding pipe (3) is provided with a pushing mechanism (4), the pushing mechanism (4) comprises a pushing pipe (41) arranged at one side of the feeding pipe (3), the inner diameter of the pushing pipe (41) is the same as that of the feeding pipe (3), one end of the pushing pipe (41) is communicated with the inside of the feeding pipe (3), the pushing pipe (41) and the feeding pipe (3) are integrally in a Y-shaped structure, a pushing plug (42) matched with the pushing pipe (41) is arranged in the pushing pipe (41), the pushing pipe (41) is provided with a pushing cylinder (44) driving the pushing plug (42) to reciprocate in the pushing pipe (41) and the feeding pipe (3), a defoaming kettle (6) is further connected to the reaction kettle (2), a communicating pipe (61) is arranged between the reaction kettle (2) and the defoaming kettle (6), a rotor pump (62) is arranged on the communicating pipe (61), a sealing (431) which is sleeved on the peripheral surface of the pushing plug (42) and is provided with an annular shape and is abutted with the inner wall of the pushing pipe (41), the sealing air sac (431) is embedded into the inner peripheral surface of the pushing pipe (41), one side of the sealing air sac (432) close to the sealing air sac (432) is arranged at one side of the sealing air sac (432) near the inner peripheral surface (432) of the pushing plug (42), an auxiliary piece (433) for changing the total volume between the sealing air bag (431) and the inside of the air pipe (432) is arranged on the air pipe (432), the auxiliary piece (433) comprises an auxiliary plug (434) which is arranged on the air pipe (432) and is in sliding connection with the side wall of the air pipe (432), a clamping ring (435) is arranged on the outer surface of the auxiliary plug (434) at a position close to the upper end face and the lower end face, the upper end face of the auxiliary plug (434) is fixedly connected with a piston rod of a pushing air cylinder (44), a connecting ring (437) with the same structure as the auxiliary plug (434) is also sleeved on the piston rod of the pushing air cylinder (44), a collar (436) is arranged on the outer side of the connecting ring (437), the connecting ring (437) penetrates through the collar (436) and is in sliding connection with the collar (42), when the collar (436) moves to be abutted against the connecting ring (437) in a direction away from the pushing plug (42), the clamping ring (435) close to the pushing plug (42) is abutted against the inner surface of the air pipe (432) in a position close to the direction of the pushing plug (42), the center of the reaction kettle (2) is provided with a vertical measuring rod (7), the lower end of the measuring rod (7) is provided with a resistance sensor (71), and the resistance sensor (71) is coupled with a control center (17).
2. The feed system for producing a polyimide film according to claim 1, wherein: the outside of the pushing pipe (41) is provided with a blast pipe (8), one end of the blast pipe (8) extends to the inside of the pushing pipe (41) and is communicated with the inside of the feeding pipe (3), and one end, far away from the pushing pipe (41), of the blast pipe (8) is connected with a blower (81).
3. The feed system for producing a polyimide film according to claim 1, wherein: the feeding mechanism (1) comprises a feeding hopper (11), a screw conveyor (13) is arranged below the feeding hopper (11), the feeding hopper (11) is communicated with a feeding port of the screw conveyor (13) at the position of the lower end face, and a discharging port of the screw conveyor (13) is communicated with an upper end head of a feeding pipe (3) of the reaction kettle (2).
4. A feed system for producing a polyimide film according to claim 3, wherein: a weighing hopper (14) is connected between the upper end head of the feed pipe (3) and the discharge port of the screw conveyor (13), the upper port of the weighing hopper (14) is open and communicated with the discharge port of the screw conveyor (13), a supporting frame (15) is arranged on the outer side of the weighing hopper (14), and a pressure sensor (16) for transmitting the weight of materials in the weighing hopper is arranged on the supporting frame (15).
5. The feed system for producing a polyimide film according to claim 1, wherein: the feeding mechanism (1) comprises a feeding barrel (51), a conveying pipe (53) is connected to the feeding barrel (51), one end, away from the feeding barrel (51), of the conveying pipe (53) is communicated with the upper end of the feeding pipe (3), and a feeding pump (52) and a first throttle valve (56) are arranged on the conveying pipe (53).
6. The feed system for producing a polyimide film according to claim 5, wherein: the conveying pipe (53) is also provided with a second throttle valve (57), and the second throttle valve (57) is positioned at one end of the first throttle valve (56) close to the feed barrel (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310613131.6A CN116328659B (en) | 2023-05-29 | 2023-05-29 | Feeding system for polyimide film production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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