CN113001929A

CN113001929A - Production equipment of soluble material film, pipeline heater and film making method thereof

Info

Publication number: CN113001929A
Application number: CN202110182153.2A
Authority: CN
Inventors: 任志夫
Original assignee: Longnan Zhifu Plastic Products Co ltd
Current assignee: Longnan Zhifu Plastic Products Co ltd
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2021-06-22
Anticipated expiration: 2041-02-09
Also published as: CN113001929B

Abstract

The invention relates to production equipment of a soluble material film, a pipeline heater and a film making method thereof, wherein the production equipment comprises a liquid storage mechanism, a solution processing mechanism, a raw material dissolving mechanism, a negative pressure bubble removing mechanism, a vacuum drying mechanism and a finished film processing mechanism which are sequentially connected through a pipeline, the vacuum drying mechanism is communicated with the liquid storage mechanism through a steam recovery pipeline connected above, the raw material and the solution are mixed and processed, then are injected into a film forming feeding die head through a high-pressure feeding pump, extruded into a film to be dried in the vacuum drying mechanism, the dried film is mechanically processed in the finished film processing mechanism to obtain a finished film, and the finished film is curled and stored through a winding roller. The production equipment provided by the invention can be used for preventing gel from being left on the pipe wall in the solution heating process by adopting the pipeline heater, and can be used for continuously producing a film according to the requirement by combining with the film preparation method, and the mechanical property and the color of the film are not influenced.

Description

Production equipment of soluble material film, pipeline heater and film making method thereof

Technical Field

The invention relates to the field of film production equipment, in particular to production equipment for a soluble material film, a pipeline heater for improving the temperature of raw materials or solution in the production equipment and a film preparation method of the production equipment for the soluble material film.

Background

Polyvinyl alcohol (PVA) film, is a world-recognized excellent fully-degradable environment-friendly packaging and multipurpose film applied in other fields; compared with the existing common plastic film, the high-strength high-toughness high-strength plastic film has the advantages of better light transmittance, tear resistance, low. The application covers the fields of industry, agriculture, civil, commercial and military, and is a preferred plastic product for solving the world problem of white pollution in the future.

The current market is a solution-based method for producing PVA film, film materials are prepared by casting and film forming, a solution processing and forming process of silkworm food needs to go through the dissolving and drying processes, a heating element is arranged on the wall of a raw material barrel in order to keep the temperature of the raw material and the solution in the processing process of pre-dissolving and fusing the solution and the raw material, the raw material and the solution in the barrel are heated by the heat transfer of the heating element, wherein the heating area is not easy to control, the heating position is closely related to the height of a liquid level, if the height of the liquid level is lower than the height of a heating element, the barrel wall is gelled, and the quality of the subsequent;

a drying oven type drying method is adopted for drying the PVA film, the method has the advantages of high energy consumption, low efficiency, slow temperature adjustment response and large temperature difference of each point in the drying oven, and meanwhile, the mechanical property and color of the finished film are influenced and the product quality is reduced due to overhigh continuous drying temperature in the drying oven;

in addition, most of the current manufacturers select single-piece production for the production of the PVA film, and must manually carry out feeding and blanking, so that the production efficiency is low, and the consumption cost is high.

Disclosure of Invention

The purpose of the invention is: the invention provides a production device of a soluble material film for solving the problem of poor product quality caused by raw material treatment and film forming drying in the production process of a PVA film, and the invention also aims to provide a film preparation method of the production device of the soluble material film, which can continuously produce the PVA film, reduce the cost and improve the working efficiency; it is yet another object of the present invention to provide a line warmer that can continuously heat a material or solution without affecting the quality of the material or solution.

The technical solution of the invention is as follows: the production equipment of the soluble material film is characterized by comprising a liquid storage mechanism, a solution treatment mechanism, a raw material dissolving mechanism, a negative pressure bubble removing mechanism, a vacuum drying mechanism and a finished product film treatment mechanism which are sequentially connected through pipelines, wherein the vacuum drying mechanism is communicated with the liquid storage mechanism through a first steam recovery pipeline connected above the vacuum drying mechanism, and a filtering mechanism is arranged between the negative pressure bubble removing mechanism and the vacuum drying mechanism;

after the raw materials and the solution are mixed, the mixture is injected into a film forming feeding die head by a high-pressure feeding pump, extruded into a film, and dried in a vacuum drying mechanism, and the film obtained by drying is subjected to mechanical treatment in a finished film treatment mechanism to obtain a finished film which is coiled and stored by a winding roller.

Preferably, the method comprises the following steps: the liquid storage mechanism comprises a liquid storage tank, a liquid supplementing pipeline and a first discharging pipeline, wherein the liquid supplementing pipeline is communicated with an inner cavity of the liquid storage tank and an external pipeline, the first discharging pipeline is communicated with an inner cavity of the liquid storage tank and a solution processing mechanism, a liquid overflowing opening is further arranged on the upper portion of the side wall of the liquid storage tank in a penetrating mode, a first discharging switch is arranged on the first discharging pipeline, a liquid supplementing valve is arranged on the liquid supplementing pipeline, a liquid supplementing ball valve is arranged at the end portion of the liquid supplementing pipeline, and the liquid supplementing ball.

Preferably, the method comprises the following steps: solution treatment mechanism includes solution treatment tank, intercommunication solution treatment tank inner chamber and raw materials dissolve the second discharge pipeline of mechanism, second discharge switch, constant delivery pump, first pipeline heater, first feed switch, second check valve are installed in proper order on the second discharge pipeline, are located still be connected with first branch road between first pipeline heater and the first feed switch, first branch road extends to get into in the solution treatment tank, is located first branch road tip in the solution treatment tank is equipped with the nozzle, still be equipped with first circulation switch on the first branch road.

Preferably, the method comprises the following steps: the raw materials dissolves the mechanism and includes raw materials dissolving tank, intercommunication raw materials dissolving tank inner chamber and negative pressure bubble removal mechanism's third discharge pipeline, raw materials dissolving tank top is equipped with the dog-house, and second discharge pipeline extends to get into in the raw materials dissolving tank, is located second discharge pipeline tip in the raw materials dissolving tank is equipped with a plurality of nozzles, and third discharge pipeline connects in raw materials dissolving tank bottom, third discharge pipe installs third discharge switch, charge-pump, second pipeline heater, second feed switch in proper order on the road, is located still be connected with the second branch road between second pipeline heater and the second feed switch, the second branch road extends to get into in the raw materials dissolving tank, is located the interval is equipped with a plurality of nozzles on the second branch road in the raw materials dissolving tank, still be equipped with second circulation switch on the second branch road.

Preferably, the method comprises the following steps: the negative-pressure defoaming and heat-preserving mechanism comprises a negative-pressure defoaming and heat-preserving tank, a stirring motor for stirring raw materials in the negative-pressure defoaming and heat-preserving tank, and a fourth discharge pipeline for communicating an inner cavity of the negative-pressure defoaming and heat-preserving tank with the vacuum drying mechanism, wherein the inner cavity of the negative-pressure defoaming and heat-preserving tank is connected with the first steam recovery pipeline through an exhaust pipe;

the filtering mechanism comprises a coarse filter, a high-pressure feeding pump and a fine filter which are sequentially communicated through pipelines.

Preferably, the method comprises the following steps: a raw material pre-concentration mechanism is further arranged between the raw material dissolving mechanism and the negative pressure defoaming mechanism, the raw material pre-concentration mechanism comprises a raw material concentration tank and a fifth discharge pipeline for communicating the raw material concentration tank with the negative pressure defoaming mechanism, the raw material dissolving mechanism is communicated with the inner cavity of the raw material concentration tank through a third discharge pipeline, a first filter is arranged at the end part of the third discharge pipeline, a fifth discharge switch, a fourth check valve, a feed pump, a fourth pipeline heater, a fourth feed switch and a second filter are sequentially arranged on the fifth discharge pipeline, a third branch is further connected between the fourth pipeline heater and the fourth feed switch, the third branch extends into the raw material concentration tank, and a third circulation switch is further arranged on the third branch;

the concentrated jar inner chamber of raw materials still is connected with second steam recovery pipeline, the second steam recovery pipeline other end and stock solution mechanism intercommunication, be equipped with second pipeline switch, fifth check valve and second vacuum pump on the second steam recovery pipeline in proper order, still be equipped with the pipeline branch road between second pipeline switch and the fifth check valve, be equipped with the pipeline option switch on the pipeline branch road.

Preferably, the method comprises the following steps: the feeding pumps are gear pumps or screw pumps;

the high-pressure feeding pump is selected from the following three types: gear pump, screw pump, piston pump.

Preferably, the method comprises the following steps: the first pipeline warmer, the second pipeline warmer, the third pipeline warmer and the fourth pipeline warmer are of the same structure and comprise a first coil pipe and a second coil pipe which are arranged in parallel and an electromagnetic heating coil assembly arranged between the first coil pipe and the second coil pipe through a coil support, wherein a liquid inlet of the first coil pipe is communicated with a liquid outlet of the second coil pipe;

the upper surfaces and the lower surfaces of the first coil pipe and the second coil pipe are flattened, and every two adjacent pipelines are mutually welded to form a coherent and flat plane;

the electromagnetic heating coil assembly comprises a coil protection box, a coil support and an insulating heat insulation plate which are arranged in the coil protection box, an electromagnetic coil arranged on the coil support, and a liquid supplementing cup communicated with an inner cavity of the coil protection box, wherein a plurality of air pressure balance holes are arranged above the liquid supplementing cup in a penetrating manner, and the liquid supplementing cup supplements insulating heat-conducting objects to enter the coil protection box and is filled around the electromagnetic coil.

Preferably, the method comprises the following steps: the vacuum drying mechanism comprises a vacuum drying chamber and a steam collecting cover which is arranged above the vacuum drying chamber and communicated with the vacuum drying chamber, the steam collecting cover is connected with the liquid storage mechanism through a first steam recovery pipeline, the steam collecting cover is also provided with a vacuum meter, a fourth discharging pipeline penetrates through the side wall of the vacuum drying chamber to enter the chamber, and a film-forming feeding die head is arranged at the discharging end of the fourth discharging pipeline;

the vacuum drying chamber comprises a fixed support fixedly arranged on the side wall, bearing seats respectively arranged at two ends of the fixed support, a driving roller and a driven roller which are arranged between the bearing seats, a steel belt which connects the driving roller and the driven roller in a transmission way, a plurality of temperature sensors fixedly arranged on the inner wall of the vacuum drying chamber, and electromagnetic heating induction coils which are arranged on the outer side of the roller and two sides of the steel belt, wherein a self-closing film discharge port is arranged below the vacuum drying chamber in a penetrating way;

the lower surface of the fixed support is also fixedly provided with a plurality of positioning suction strips for adsorbing steel strips, the side surfaces of the driving roller and the driven roller are respectively provided with a conductive device, the conductive devices are connected with an external power supply through cables, the driving roller and the driven roller are in an insulating state, and the steel strips become resistive heating bodies after the driving roller and the driven roller are electrified;

one of them bearing frame sets firmly on the fixed bolster, and another bearing frame passes through tension control assembly movable mounting on the fixed bolster, tension control assembly includes fixed side bearer, slider, fixed side bearer is worn to be equipped with the spout and the spout lateral wall is worn to be equipped with the screw hole, the bearing frame install in the spout and with slider fixed connection, slider lateral wall rigid connection have with screw hole screw-thread fit's lead screw.

Preferably, the method comprises the following steps: a steel belt deviation correcting mechanism is also arranged between the driving roller and the driven roller and comprises a fixed supporting seat, deviation correcting and adjusting components respectively fixed on two sides of the fixed supporting seat and a sliding supporting seat positioned between the two deviation correcting and adjusting components and sleeved on the fixed supporting seat;

the sliding support seat is concavely provided with a groove position, a steel belt supporting device and a deviation correcting rotating wheel set are arranged in the groove position, the deviation correcting rotating wheel set is distributed on the left side and the right side of the steel belt supporting device, a groove matched with the thickness of a steel belt is further formed in a rotating wheel of the deviation correcting rotating wheel set, the top surface of the steel belt supporting device is higher than the top points of the driving roller and the driven roller, the steel belt is lifted by the steel belt supporting device and is positioned in the groove of the deviation correcting rotating wheel set, and the steel belt moves under the guiding action of the deviation correcting rotating wheel set;

the deviation rectifying and adjusting assembly comprises a rotary servo motor, a thrust screw rod, a pressure sensor and a buffer spring group, wherein the thrust screw rod is controlled by the rotary servo motor, the end part of the thrust screw rod penetrates through the fixed supporting seat, the pressure sensor is fixed at the end part of the thrust screw rod, the buffer spring group is installed at the sensing head of the pressure sensor, and the other end of the buffer spring group abuts against the side wall of the sliding supporting seat.

Preferably, the method comprises the following steps: the self-closing film discharge port comprises an upper guide piece and a lower guide piece which form a set inclination angle with the horizontal plane and are arranged in parallel, a pressing strip is fixedly arranged at the end part of the upper guide piece, the lower guide piece is a lower supporting soft plate fixed on the wall of the vacuum drying chamber, the film is guided out through a gap between the upper guide piece and the lower guide piece, and the pressing piece and the lower supporting soft plate are always attached to the film.

The invention provides another technical solution that: the film preparation method of the soluble material film production equipment is characterized by comprising the following steps:

the method comprises the steps of opening a liquid supplementing valve, and supplementing solution into a liquid storage tank through an external pipeline;

secondly, the liquid level in the liquid storage tank rises to a first set liquid level, the float switch controls the liquid supplementing ball valve to be closed, the first discharging switch is turned on, and the solution in the liquid storage tank enters the solution treatment tank;

the second discharging switch and the first circulating switch are turned on, the solution at the lower part of the solution treatment tank is quantitatively pumped into the first pipeline heater under the action of the quantitative pump, and the solution is heated by heat transfer and then flows back into the solution treatment tank through the first branch;

turning on a first feeding switch, turning off a first circulation switch, enabling the solution in the solution treatment tank to flow into the raw material dissolving tank through a second discharging pipeline, feeding the raw materials from a feeding port, mixing the raw materials with the solution in the raw material dissolving tank, and stirring and dissolving the raw materials;

fifthly, opening a third discharging switch and a second circulating switch, extracting the dissolved raw materials under the action of a feed pump, feeding the raw materials into a second pipeline heater, heating the raw materials by utilizing heat transfer, and refluxing the raw materials into a raw material dissolving tank through a second branch;

sixthly, opening a second feeding switch, closing a second circulation switch, and feeding the heated raw materials dissolved in the raw material dissolving tank into a raw material concentration tank through a third discharging pipeline for concentration;

turning on a fifth discharging switch and a third circulating switch, pumping the concentrated raw materials into a fourth pipeline heater under the action of a feeding pump, heating the raw materials by utilizing heat transfer, and then refluxing the raw materials into a raw material concentration tank through a third branch;

and the fourth feeding switch is turned on, the third circulating switch is turned off, and the concentrated raw material in the raw material concentration tank enters the negative pressure defoaming heat-preserving tank through the fifth discharging pipeline for stirring and vacuum defoaming treatment;

the third discharging switch and the third feeding switch are turned on by the self-lifting, the processed raw material passes through a coarse filter, a fine filter and a third pipeline heater in sequence under the action of a feed pump, and a membrane is output to a steel belt through a membrane forming feeding die head;

the output power of the vacuum pump is regulated, so that the negative pressure in the vacuum drying chamber is regulated, and the evaporation temperature of the solution in the vacuum drying chamber is lower than that of the solution under normal atmospheric pressure;

the diaphragm is dried on the steel belt to form a film, and the film is separated from the steel belt and is led out from the self-closing film discharge port under the action of the separating roller;

the film derived from the water is curled and stored by the film rolling equipment after the mechanical treatment is carried out on the finished film treatment mechanism.

Preferably, the method comprises the following steps: in the step, if the steel belt deviates in the operation process, the buffer spring group on the deviation side is pressed, the pressure sensors on the two sides form pressure difference, the rotary servo motor on the deviation side is started to push the whole sliding support seat to slide to the other side along the fixed support seat, so that the deviation of the steel belt is corrected, and the rotary servo motor stops when the pressures of the pressure sensors on the two sides are balanced.

The invention provides another technical solution as follows: a pipeline heater for film production equipment is characterized by comprising a first coil pipe, a second coil pipe and an electromagnetic heating coil assembly, wherein the first coil pipe and the second coil pipe are arranged in parallel, the electromagnetic heating coil assembly is arranged between the first coil pipe and the second coil pipe through a coil support, and a liquid inlet of the first coil pipe is communicated with a liquid outlet of the second coil pipe;

the upper surfaces and the lower surfaces of the first coil pipe and the second coil pipe are flattened, and gaps between every two adjacent pipelines are welded to form a continuous and flat plane;

the electromagnetic heating coil assembly comprises a coil protection box, a coil support and an insulating heat insulation plate which are arranged in the coil protection box, an electromagnetic coil arranged on the coil support, and a liquid supplementing cup communicated with an inner cavity of the coil protection box, wherein the coil protection box is made of a non-magnetic conductive heat conduction material, a plurality of air pressure balance holes are arranged above the liquid supplementing cup in a penetrating mode, and the liquid supplementing cup supplements insulating heat conduction objects to the coil protection box and is filled around the electromagnetic coil.

Compared with the prior art, the invention has the beneficial effects that:

the equipment is integrally connected through a pipeline, raw materials and solution are mixed and dissolved through a plurality of mechanisms and then are led out after forming a finished film in a vacuum drying chamber through mechanical tests, the integral production process is coherent, and a film with the film thickness larger than 0.08mm can be continuously produced according to requirements by combining the combination technology of negative pressure preconcentration, a high-pressure feed pump and a mould;

secondly, the diaphragm is dried in a negative pressure environment, the evaporation temperature of a solution is reduced, the mechanical property of the diaphragm and the color of a finished product film are prevented from being influenced by high temperature, a plurality of electromagnetic heating induction coils are adopted to heat all sections of a steel belt, the heating of all the sections of the steel belt can be set according to the process requirement of film forming, the quality of the finished product film is ensured, and the driving roller and the driven roller which are connected with cables are used as auxiliary materials, so that the diaphragm is dried in a vacuum drying chamber at a stable temperature all the time, the temperature control precision in the vacuum drying chamber is high, the temperature regulation response speed is high, and the product quality of the finished product film is improved;

the raw materials and the solution are heated by the pipeline heater, the raw materials and the solution are circularly heated in the coil pipe, the inner wall of the coil pipe cannot be scarred, and the raw materials and the solution are dissolved only by heat insulation or stirring in the raw material tank.

The pipeline heater is characterized in that the pipeline heater is formed by arranging two coil pipes on two sides of the electromagnetic heating coil assembly in parallel, the two coil pipes are communicated, raw materials or solutions enter the pipeline heater and then sequentially pass through the first coil pipe and the second coil pipe, and the raw materials or the solutions circularly heat to a proper temperature and then flow out through the discharging pipeline, so that the condition that the pipe wall is scarred or the temperature is not proper is avoided;

the deviation correcting mechanism is further arranged on the steel belt conveying mechanism, the pressure sensors on the left side and the right side abut against the side wall of the sliding support seat through the buffer spring groups respectively, and if pressure difference exists between the sensors on the left side and the right side, deviation correcting action is immediately carried out, so that the product quality is guaranteed; in addition, the steel belt is supported by the steel belt dragging device to form an arched belt surface, so that the lateral stress of the steel belt is improved, and the influence on the product quality caused by excessive deformation of the steel belt due to the lateral stress during deviation correction is avoided.

Drawings

FIG. 1 is a schematic structural view of a production apparatus for a thin film of a soluble material;

FIG. 2 is a top view of a steel strip deviation rectifying mechanism;

FIG. 3 is a schematic sectional view of a steel belt deviation correcting mechanism;

FIG. 4 is an enlarged schematic view of the structure at A;

FIG. 5 is a schematic diagram of a line warmer;

fig. 6 is a cross-sectional view taken along line B-B of fig. 5.

Description of the main Components

Detailed Description

The invention will be described in more detail below with reference to the accompanying drawings:

the following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention more readily understood by those skilled in the art, and thus will more clearly and distinctly define the scope of the invention. The directional terms used in the present invention, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., refer to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention.

Referring to fig. 1, a production apparatus for a soluble material film includes a liquid storage mechanism 1, a solution processing mechanism 2, a raw material dissolving mechanism 3, a raw material preconcentration mechanism 4, a negative pressure defoaming mechanism 5, a vacuum drying mechanism 6, and a finished product film processing mechanism 7, which are sequentially connected by a pipeline, wherein the vacuum drying mechanism 6 is communicated with the liquid storage mechanism 1 through a first vapor recovery pipeline 64 connected above the vacuum drying mechanism 6, a filtering mechanism is further disposed between the negative pressure defoaming mechanism 5 and the vacuum drying mechanism 6, the first vapor recovery pipeline 64 is provided with a first pipeline switch 641, a first check valve 642, and a first vacuum pump 643, and the first vapor recovery pipeline 64 is further provided with a first vacuum meter 644 for detecting a pressure value at the end of the first vapor recovery pipeline 64;

the liquid storage mechanism 1 comprises a liquid storage tank 11, a liquid supplementing pipeline 12 for communicating an inner cavity of the liquid storage tank 11 with an external pipeline, and a first discharge pipeline 13 for communicating an inner cavity of the liquid storage tank 11 with the solution processing mechanism 2, wherein a liquid overflowing port 14 is further arranged on the upper portion of the side wall of the liquid storage tank 11 in a penetrating mode, a first discharge switch 131 is arranged on the first discharge pipeline 13, a liquid supplementing valve 121 is arranged on the liquid supplementing pipeline 12, a liquid supplementing ball valve 122 is arranged at the end portion of the liquid supplementing pipeline, and the liquid supplementing ball valve 122 is connected with a float switch 15.

Solution processing mechanism 2 includes solution treatment tank 21, intercommunication solution treatment tank 21 inner chamber and raw materials dissolve second discharge line 22 of mechanism 3, install second discharge switch 221, dosing pump 222, first pipeline warmer 223, first feed switch 224, second check valve 225 in proper order on the second discharge line 22, be located still be connected with first branch road 23 between first pipeline warmer 223 and the first feed switch 224, first branch road 23 extends to get into solution treatment tank 21 in, is located interval is equipped with a plurality of nozzles 232 on the first branch road 23 in solution treatment tank 21, still be equipped with first circulation switch 231 on the first branch road 23.

The raw material dissolving mechanism 3 comprises a raw material dissolving tank 31 and a third discharging pipeline 32 communicating an inner cavity of the raw material dissolving tank 31 with a raw material pre-concentrating mechanism 4, wherein a feeding port 311 is arranged at the top of the raw material dissolving tank 31, a second discharging pipeline 22 extends into the raw material dissolving tank 31, a plurality of nozzles 226 are arranged on the second discharging pipeline 22 in the raw material dissolving tank 31 at intervals, the starting end of the third discharging pipeline 32 is communicated with the bottom of the raw material dissolving tank 31, a third discharging switch 321, a second discharging switch 322, a second pipeline warmer 323, a second feeding switch 324 and a first filter warmer 325 are sequentially arranged on the third discharging pipeline 32, a second branch 33 is also connected between the second pipeline 323 and the second feeding switch 324, the second branch 33 extends into the raw material dissolving tank 31, a plurality of nozzles 332 are arranged on the second branch 33 in the raw material dissolving tank at intervals, a second circulating switch 331 is further arranged on the second branch;

the raw material dissolving tank 31 is further provided with a first pressure gauge 34 for detecting the pressure value of the inner cavity of the tank body, the top of the raw material dissolving tank 31 is further provided with a pressure safety valve 35, and when the first pressure gauge 34 detects that the pressure value of the cavity of the tank body is too high, the pressure safety valve 35 can properly release air in the cavity.

The raw material pre-concentration mechanism 4 comprises a raw material concentration tank 41 and a fifth discharge pipeline 42 for communicating the raw material concentration tank 41 with the negative pressure defoaming mechanism 5, the raw material dissolving mechanism 3 is communicated with the inner cavity of the raw material concentration tank 41 through a third discharge pipeline 32, a first filter 326 is arranged at the end of the third discharge pipeline 32, the start end of the fifth discharge pipeline 42 is communicated with the bottom of the raw material concentration tank 41, a fifth discharge switch 421, a fourth check valve 422, a second gear pump 423, a fourth pipeline heater 424, a fourth feed switch 425 and a second filter 426 are sequentially arranged on the fifth discharge pipeline 42, a third branch 43 is also connected between the fourth pipeline heater 424 and the fourth feed switch 425, the third branch 43 extends into the raw material concentration tank 41, and a third circulation switch 431 is further arranged on the third branch;

the top of the raw material concentration tank 41 is also provided with a second vacuum meter 44 for detecting the pressure of the inner cavity of the tank body;

the inner cavity of the raw material concentration tank 41 is further connected with a second steam recovery pipeline 45, the other end of the second steam recovery pipeline 45 is communicated with the liquid storage mechanism 1, a second pipeline switch 451, a fifth check valve 452 and a second vacuum pump 453 are sequentially arranged on the second steam recovery pipeline 45, a pipeline branch 46 is further arranged between the second pipeline switch 451 and the fifth check valve 452, and a pipeline selection switch 46 is arranged on the pipeline branch 46.

The negative-pressure defoaming mechanism 5 comprises a negative-pressure defoaming heat-preserving tank 51, a stirring motor 52 for stirring raw materials in the negative-pressure defoaming heat-preserving tank 51, and a fourth discharge pipeline 53 for communicating the inner cavity of the negative-pressure defoaming heat-preserving tank 51 with the vacuum drying mechanism 6, wherein the inner cavity of the negative-pressure defoaming heat-preserving tank 51 is connected with the first steam recovery pipeline 64 through an exhaust pipe 54, the negative-pressure defoaming heat-preserving tank 51 further comprises a third vacuum meter 55 for detecting the pressure of the inner cavity, the starting end of the fourth discharge pipeline 53 is communicated with the bottom of the negative-pressure defoaming heat-preserving tank 51, a fourth discharge switch 531, a third check valve 532, a filtering mechanism, a third pipeline warmer 536 and a third feed switch 537 are sequentially installed on the fourth discharge pipeline 53, and a film-forming and feeding die head 538 is arranged at the end of the fourth discharge pipeline;

the filtering mechanism comprises a coarse filter 533, a third gear pump 534 and a fine filter 535 which are sequentially communicated through a pipeline;

an exhaust valve 541 is also arranged on the exhaust pipe 54;

the third gear pump may alternatively use a piston pump.

The vacuum drying mechanism 6 comprises a vacuum drying chamber 61 and a steam collecting cover 63 which is arranged above the vacuum drying chamber 61 and communicated with the vacuum drying chamber 61, the steam collecting cover 63 is connected with the liquid storage mechanism 1 through a first steam recovery pipeline 63, the steam collecting cover 63 is further provided with a fourth vacuum meter 631, and a fourth discharging pipeline 53 penetrates through the side wall of the vacuum drying chamber 61 to enter the chamber;

the vacuum drying chamber 61 comprises a fixing support 611 fixedly arranged on the side wall, bearing seats 612 respectively arranged at two ends of the fixing support 611, a driving roller 613 and a driven roller 613 arranged between the bearing seats 612, a steel belt 614 for driving and connecting the driving roller 613 and the driven roller 613, a plurality of temperature sensors 615 fixedly arranged on the inner wall of the vacuum drying chamber 61, and electromagnetic heating induction coils 616 arranged on the outer side of the rollers 613 and two sides of the steel belt 614, wherein a self-closing film discharge port A is arranged below the vacuum drying chamber 61 in a penetrating manner, a separating roller 617 is further fixedly arranged between the steel belt 614 and the self-closing film discharge port, a steel belt deviation correcting mechanism 62 is further arranged between the driving roller 613 and the driven roller 613 and on the inner side of the steel belt 614, and a film forming feeding die head 538 at the end of a fourth discharge pipeline 53 is arranged right above the steel;

the lower surface of the fixed support 611 is further fixedly provided with a plurality of positioning suction strips 6111 which are used for adsorbing the low friction resistance and temperature-resistant strong magnetism of the steel belt 614, the side surfaces of the driving roller 613 and the driven roller 613 are respectively provided with a conductive device 6131, the conductive devices 6131 are connected with an external power supply through cables 6132, and the driving roller 613 and the driven roller 613 are in an insulating state;

the bearing seat 612 for mounting the driven roller 613 is fixedly arranged on the fixed support 611, the bearing seat 612 for mounting the driving roller 613 is movably arranged on the fixed support 611 through a tension control assembly, the tension control assembly comprises a fixed side frame 6112 and a sliding block 6113, the fixed side frame 6112 is provided with a sliding groove in a penetrating manner, a threaded hole penetrates through the side wall of the sliding groove, the bearing seat 612 is arranged in the sliding groove and is fixedly connected with the sliding block 6113, the side wall of the sliding block 6113 is rigidly connected with a lead screw 6114 in threaded fit with the threaded hole, and the driving roller 613 is controlled to transversely move along the sliding groove by rotating the lead screw 6114, so that the tension of the steel.

The steel belt 614 may be heated in the vacuum drying chamber 61 by:

a. the steel belt 614 is directly heated by using electromagnetic heating induction coils 616 which are equidistantly distributed on the inner side or the outer side of the steel belt 614;

b. the driving roller 613 at both ends and the conductive device 6131 fixedly arranged at both sides of the driven roller 613 are connected with an external power supply by a cable 6132, and current flows out after flowing to the driving roller 613, the steel strip 614 and the driven roller 613 from the external power supply, so that the steel strip 614 becomes a resistive heating body, thereby the steel strip generates heat per se, and meanwhile, the temperature of each part on the steel strip 614 is adjusted according to requirements by matching with the electromagnetic heating induction coils 616 which are equidistantly distributed at the inner side or the outer side of the steel strip 614.

Referring to fig. 1, 2 and 3, a steel belt deviation correcting mechanism 62 is further disposed between the driving roller and the driven roller, and the steel belt deviation correcting mechanism 62 includes a fixed support seat 621 fixed on the inner walls of both sides, deviation correcting adjusting components respectively fixed on both sides of the fixed support seat 621, and a sliding support seat 622 located between the two deviation correcting adjusting components and sleeved on the fixed support seat 621;

a groove is concavely arranged on the sliding support 622, a steel belt carrier 624 and a deviation-correcting rotating wheel set 625 are arranged in the groove, the deviation-correcting rotating wheel set 625 is distributed on the left side and the right side of the steel belt carrier 624, the top surface of the steel belt carrier 624 is higher than the top points of the driving roller 613 and the driven roller 613, and the steel belt is lifted by the steel belt carrier 624 and moves under the guiding action of the deviation-correcting rotating wheel set 625;

the deviation rectifying and adjusting assembly comprises a rotary servo motor 6231, a thrust screw 6232 controlled by the rotary servo motor 6231 and having an end penetrating through the fixed supporting seat 621, a pressure sensor 6233 fixed at the end of the thrust screw 6232, and a buffer spring set 6234 installed at the sensing head of the pressure sensor 6233, wherein the other end of the buffer spring set 6234 abuts against the side wall of the sliding supporting seat 622.

Referring to fig. 4, the self-closing film discharging port a includes an upper guide and a lower guide, which are parallel to each other and form a set inclination angle with the horizontal plane, the end of the upper guide is further fixedly provided with a pressing strip 618, the lower guide is a lower soft supporting plate 619 fixed on the wall of the vacuum drying chamber, the film is guided out through a gap between the upper guide and the lower guide, and the pressing strip 618 and the lower soft supporting plate 619 are always attached to the film;

because the vacuum-pumping treatment is carried out in the vacuum drying chamber 61, the indoor pressure is lower than the normal atmospheric pressure outside, when the vacuum drying chamber works, the outside pressure can have a direction towards the indoor pressure to the lower supporting soft plate 619, so that the film discharge port is in a normally closed state, the outside air can not normally flow into the vacuum drying chamber 61, and the heat in the vacuum drying chamber 61 can not be easily lost.

Finished product membrane processing mechanism 7 includes a plurality of crisscross tensioning rollers 71, the film rolling equipment 72 that distribute from top to bottom, the film is the S type and carries out the mechanical processing back through a plurality of tensioning rollers in proper order and obtain the finished product membrane, the finished product membrane carries out final curling through the film wind-up roll and accomodates.

Referring to fig. 5 and 6, the first pipeline warmer 223, the second pipeline warmer 323, the third pipeline warmer 536 and the fourth pipeline warmer 424 have the same structure, the pipeline warmer includes a first coil 81 and a second coil 82 disposed in parallel, and an electromagnetic heating coil assembly 83 disposed between the first coil 81 and the second coil 82, and a liquid inlet 811 of the first coil is communicated with a liquid outlet 822 of the second coil;

flattening the upper surfaces and the lower surfaces of the first coil pipe 81 and the second coil pipe 82, and flattening the welding seams 812(821) between every two adjacent pipelines after welding, so that the upper surfaces and the lower surfaces of the first coil pipe 81 and the second coil pipe 82 form a continuous and flat plane;

the electromagnetic heating coil assembly 83 comprises a coil protection box 831, a coil support 832 with the built-in coil protection box 831, an insulating thermal baffle 833, an electromagnetic coil 834 arranged on the coil support 832, and a liquid supplementing cup 835 communicated with the inner cavity of the coil protection box 831;

the coil protection box 831 is made of a non-magnetic conductive material;

a plurality of air pressure balance holes 8351 are arranged above the liquid supplementing cup 835 in a penetrating manner, the liquid supplementing cup 835 supplements insulated heat-conducting objects to enter the coil protection box 831 and is filled around the electromagnetic coil 834, a liquid supplementing liquid level line 8352 is further carved on the cup wall of the liquid supplementing cup 835, when the insulated heat-conducting objects in the liquid supplementing cup 835 flow into the coil protection box 831, the air pressure in the liquid supplementing cup 835 is reduced, and at the moment, external air flows into the liquid supplementing cup 835 from the air pressure balance holes 8351 to balance the air pressure in the cup;

solution that flows out from the liquid storage tank body flows into pipeline heater 8 from inlet 821 of second coil, electromagnetic heating coil subassembly 83 circular telegram after generating heat, coil protection box 831 and second coil 821 carry out primary heating to solution through the heat transfer effect, then solution flows into first coil 81 from the liquid outlet 822 of second coil 82, electromagnetic heating coil carries out electromagnetic heating to first coil, first coil carries out direct secondary heating to solution for solution only flows out pipeline heater 8 after the suitable temperature heaies up.

The invention provides a film preparation method of soluble material film production equipment, which specifically comprises the following steps:

the output power of the vacuum pump is regulated, so that the negative pressure in the vacuum drying chamber is regulated, and the evaporation temperature of the solution in the vacuum drying chamber is lower than that of the solution under normal atmospheric pressure.

In the step, if the steel belt deviates in the operation process, the buffer spring group on the deviation side is pressed, the pressure sensors on the two sides form pressure difference, the rotary servo motor on the deviation side is started to push the whole sliding support seat to slide to the other side along the fixed support seat, so that the deviation of the steel belt is corrected, and the rotary servo motor stops when the pressures of the pressure sensors on the two sides are balanced.

The above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.

Claims

1. Production equipment of a soluble material film is characterized by comprising a liquid storage mechanism, a solution treatment mechanism, a raw material dissolving mechanism, a negative pressure bubble removing mechanism, a vacuum drying mechanism and a finished product film treatment mechanism which are sequentially connected through pipelines, wherein the vacuum drying mechanism is communicated with the liquid storage mechanism through a first steam recovery pipeline connected above the vacuum drying mechanism, and a filtering mechanism is arranged between the negative pressure bubble removing mechanism and the vacuum drying mechanism;

2. The production equipment of the soluble material film as claimed in claim 1, wherein the liquid storage mechanism comprises a liquid storage tank, a liquid supplementing pipeline for communicating an inner cavity of the liquid storage tank with an external pipeline, and a first discharging pipeline for communicating the inner cavity of the liquid storage tank with the solution processing mechanism, a liquid overflowing port is further arranged on the upper portion of the side wall of the liquid storage tank in a penetrating manner, a first discharging switch is arranged on the first discharging pipeline, a liquid supplementing valve is arranged on the liquid supplementing pipeline, a liquid supplementing ball valve is arranged at the end portion of the liquid supplementing pipeline, and the liquid supplementing ball valve is connected with a float switch.

3. The production equipment of the soluble material film as claimed in claim 1, wherein the solution treatment mechanism comprises a solution treatment tank and a second discharge pipeline communicating an inner cavity of the solution treatment tank with the raw material dissolving mechanism, the second discharge pipeline is sequentially provided with a second discharge switch, a dosing pump, a first pipeline heater, a first feed switch and a second check valve, a first branch is further connected between the first pipeline heater and the first feed switch, the first branch extends into the solution treatment tank, a nozzle is arranged at the end of the first branch in the solution treatment tank, and a first circulation switch is further arranged on the first branch.

4. The production equipment of the soluble material film as claimed in claim 1, wherein the raw material dissolving mechanism comprises a raw material dissolving tank and a third discharging pipeline communicating an inner cavity of the raw material dissolving tank with the negative pressure defoaming mechanism, a feeding port is arranged at the top of the raw material dissolving tank, a second discharging pipeline extends into the raw material dissolving tank, a plurality of nozzles are arranged at the end part of the second discharging pipeline in the raw material dissolving tank, the third discharging pipeline is connected to the bottom of the raw material dissolving tank, a third discharging switch, a feeding pump, a second pipeline heater and a second feeding switch are sequentially arranged on the third discharging pipeline, a second branch is connected between the second pipeline heater and the second feeding switch and extends into the raw material dissolving tank, and a plurality of nozzles are arranged at intervals on the second branch in the raw material dissolving tank, and a second circulating switch is also arranged on the second branch.

5. The production equipment of the soluble material film as claimed in claim 1, wherein the negative-pressure bubble removing mechanism comprises a negative-pressure bubble removing and heat preserving tank, a stirring motor for stirring raw materials in the negative-pressure bubble removing and heat preserving tank, and a fourth discharging pipeline for communicating an inner cavity of the negative-pressure bubble removing and heat preserving tank with the vacuum drying mechanism, the inner cavity of the negative-pressure bubble removing and heat preserving tank is connected with the first steam recovery pipeline through an exhaust pipe, the negative-pressure bubble removing and heat preserving tank further comprises a vacuum meter for detecting the pressure of the inner cavity, a fourth discharging switch, a third check valve, a filtering mechanism, a third feeding switch and a third pipeline heater are sequentially installed on the fourth discharging pipeline, and a film-forming feeding die head is arranged at the end part of the fourth discharging pipeline;

6. The apparatus for producing a film of a soluble material according to claim 1, a raw material pre-concentration mechanism is also arranged between the raw material dissolving mechanism and the negative pressure defoaming mechanism, the raw material pre-concentration mechanism comprises a raw material concentration tank and a fifth discharge pipeline for communicating the raw material concentration tank with the negative pressure defoaming mechanism, the raw material dissolving mechanism is communicated with the inner cavity of the raw material concentration tank through a third discharge pipeline, a first filter is arranged at the end part of the third discharge pipeline, a fifth discharge switch, a fourth check valve, a feed pump, a fourth pipeline heater, a fourth feed switch and a second filter are sequentially arranged on the fifth discharge pipeline, a third branch is connected between the fourth pipeline heater and the fourth feed switch, the third branch extends into the raw material concentration tank, and a third circulation switch is further arranged on the third branch;

7. The production facility of a thin film of a soluble material according to claim 4, 5 or 6, wherein the feeding pumps are all gear pumps, or are screw pumps;

8. The production equipment of the soluble material thin film according to any one of claims 3 to 6, wherein the first pipeline warmer, the second pipeline warmer, the third pipeline warmer and the fourth pipeline warmer have the same structure, and comprise a first coil pipe and a second coil pipe which are arranged in parallel, and an electromagnetic heating coil assembly which is arranged between the first coil pipe and the second coil pipe through a coil bracket, wherein a liquid inlet of the first coil pipe is communicated with a liquid outlet of the second coil pipe;

9. The production equipment of the soluble material film according to claim 1, wherein the vacuum drying mechanism comprises a vacuum drying chamber and a steam collecting cover which is arranged above the vacuum drying chamber and communicated with the vacuum drying chamber, the steam collecting cover is connected with the liquid storage mechanism through a first steam recovery pipeline, the steam collecting cover is further provided with a vacuum meter, a fourth discharging pipeline penetrates through the side wall of the vacuum drying chamber to enter the chamber, and a film forming feeding die head is arranged at the discharging end of the fourth discharging pipeline;

10. The production equipment of the soluble material film as claimed in claim 9, wherein a steel belt deviation rectifying mechanism is further arranged between the driving roller and the driven roller, and comprises a fixed supporting seat, deviation rectifying and adjusting components respectively fixed on two sides of the fixed supporting seat, and a sliding supporting seat positioned between the two deviation rectifying and adjusting components and sleeved on the fixed supporting seat;

11. The apparatus for producing a thin film of a soluble material as claimed in claim 9, wherein the self-closing film outlet comprises an upper guide member and a lower guide member disposed parallel to each other at a predetermined inclination angle with respect to the horizontal plane, a pressing strip is further fixedly disposed at an end of the upper guide member, the lower guide member is a lower supporting soft plate fixed on the wall of the vacuum drying chamber, the thin film is guided out through a gap between the upper guide member and the lower guide member, and the pressing strip and the lower supporting soft plate are always attached to the thin film.

12. A film preparation method of soluble material film production equipment is characterized by comprising the following steps:

13. The method as claimed in claim 12, wherein if the steel strip is deflected during the operation, the buffer spring set on one side of the deflection is pressed, the pressure sensors on the two sides form a pressure difference, the rotary servo motor on the deflection side is started to push the sliding support to slide along the fixed support to the other side, so as to correct the deviation of the steel strip, and the rotary servo motor is stopped until the pressure sensors on the two sides are balanced.

14. A pipeline heater for film production equipment is characterized by comprising a first coil pipe, a second coil pipe and an electromagnetic heating coil assembly, wherein the first coil pipe and the second coil pipe are arranged in parallel, the electromagnetic heating coil assembly is arranged between the first coil pipe and the second coil pipe through a coil support, and a liquid inlet of the first coil pipe is communicated with a liquid outlet of the second coil pipe;