Extraction device

Abstract

An extraction device belongs to the technical field of diaphragms. The extraction device comprises a box body, a tension adjusting mechanism and a liquid scraping mechanism. Wherein an inlet tank and an extraction tank are arranged in the box body; the tension adjusting mechanism is arranged at the position, corresponding to the inlet groove, outside the box body and comprises a first driving roller, a second driving roller and a gravity roller arranged between the first driving roller and the second driving roller, the gravity roller is in swing connection with the first driving roller through a swing arm, and a first gap is formed between the gravity roller and the second driving roller; therefore, the membrane material can penetrate through the first gap around the roller surfaces of the first driving roller and the gravity roller and penetrate into the inlet groove around the roller surface of the second driving roller, so that the tension of the membrane material is adjusted, and the probability of defects such as wrinkles and breakage of the membrane is reduced. The liquid scraping rod is arranged in the inlet groove and used for enabling the membrane material to penetrate into the extraction groove through the second gap of the liquid scraping rod, the probability that foreign matter at the inlet groove and liquid enter the extraction groove along with the membrane material can be reduced, and the extraction quality is improved.

Description

Technical Field

[0001] The present application relates to the field of diaphragm technology, and in particular to an extraction device. Background Art

[0002] In the wet process of membrane processing, a high boiling point, low volatility solvent is usually used as a pore former, and the pore former is replaced in the extraction process to form a porous membrane. During the extraction, the membrane is prone to wrinkles and damage. Utility Model Content

[0003] Based on the above-mentioned deficiencies, the present application provides an extraction device to improve the problem of poor extraction quality of the diaphragm in the related art.

[0004] This application is implemented as follows:

[0005] The example of the present application provides an extraction device, including a box, a tension adjustment mechanism and a scraping mechanism. The box is provided with an inlet slot and an extraction slot; the tension adjustment mechanism is provided outside the box at a position corresponding to the inlet slot, the tension adjustment mechanism includes a first drive roller, a second drive roller and a gravity roller provided between the first drive roller and the second drive roller, the gravity roller is swingably connected to the first drive roller through a swing arm, and a first gap is formed between the gravity roller and the second drive roller, so that the film material can pass through the first gap around the roller surface of the first drive roller and the gravity roller, and pass through the inlet slot around the roller surface of the second drive roller; the scraping mechanism includes a scraping rod; the scraping rod is provided in the inlet slot, so that the film material can pass through the second gap of the scraping rod into the extraction slot.

[0006] In the above implementation process, an inlet slot and an extraction slot are sequentially arranged in the housing, and the membrane material to be extracted outside the housing can be passed into the inlet slot, and then passed into the extraction slot for extraction. Since the extractant displaces the pore-forming agent during extraction, and the temperature in the extraction slot changes, the membrane material will shrink during the extraction process in the extraction slot, causing the tension of the membrane material to change, which can easily lead to defects such as wrinkles, damage or broken membranes in the diaphragm. In the extraction device provided in the example of the present application, a tension adjustment mechanism is arranged at the inlet slot outside the housing, and a gravity roller is connected between the first drive roller and the second drive roller by a swing arm, and a first gap is formed between the gravity roller and the second drive roller. The membrane material outside the housing moves around the roller surface of the first drive roller to the gravity roller, and then passes through the first gap between the gravity roller and the second drive roller, moves around the roller surface of the second drive roller, and passes into the inlet slot. Since the gravity roller is swingably connected to the first driving roller through the swing arm, when the tension of the membrane material increases, the membrane material will exert pressure on the gravity roller in contact with it, causing the gravity roller to swing, shortening the moving path of the membrane material between the gravity roller and the second driving roller, and releasing the tension of the membrane material; when the tension of the membrane material decreases, the pressure exerted by the membrane material on the gravity roller decreases, causing the gravity roller to swing, increasing the moving path of the membrane material between the gravity roller and the second driving roller, increasing the tension of the membrane material, and thereby improving the quality of the diaphragm.

[0007] Moreover, after the membrane material outside the box passes through the inlet slot, particulate foreign matter such as dust attached to the surface of the membrane material will enter the inlet slot, and will easily accumulate in the inlet slot as the extraction process proceeds, and will adhere to the surface of the membrane material and enter the extraction slot at the rear end, which will easily scratch the membrane surface during the subsequent extraction and drying process, thereby reducing the quality of the diaphragm. In the extraction device provided in the present application, a scraper rod is provided at the inlet slot, so that the membrane material in the inlet slot passes through the second gap of the scraper rod and then enters the extraction slot for extraction. When the membrane material passes through the second gap, the scraper rod will scrape off foreign matter and liquid attached to the surface of the membrane material, reducing the probability of foreign matter and liquid in the inlet slot entering the extraction slot with the membrane material, which can not only reduce the probability of scratching the membrane surface of the membrane material, but also ensure the stability of the composition of the extract in the extraction slot, thereby further improving the quality of the diaphragm.

[0008] In an optional embodiment, two wiper rods are arranged opposite to each other to form a second gap; and / or, the wiper rod and the guide roller are arranged opposite to each other to form a second gap.

[0009] In the above implementation process, two scraper rods can be arranged at intervals to form a second gap, and the film material can pass through the second gap between the two scraper rods to scrape off foreign matter and liquid on the surface of the film material. A guide roller for guiding and conveying the film material is usually arranged in the inlet groove, and the film material usually moves around the roller surface of the guide roller. The scraper rod and the guide roller can be arranged opposite to each other, and a second gap is formed between the scraper rod and the guide roller, so that the film material passes through the second gap when moving around the guide roller, and the scraper rod scrapes off foreign matter and liquid on the surface of the film material.

[0010] In an optional embodiment, the scraping mechanism further includes an extrusion rubber roller, which is arranged at the rear end of the scraping rod and is used to allow the film material passing through the second gap to pass through the third gap of the extrusion rubber roller into the extraction tank.

[0011] In the above implementation process, a squeezing rubber roller with a third gap is arranged at the rear end of the scraping rod, and the film material that has been scraped by the scraping rod passes through the third gap and then enters the extraction tank. The squeezing rubber roller will squeeze the film material during the process of the film material passing through the third gap, which can further reduce the amount of liquid residue on the surface of the film material, reduce the probability of the liquid in the inlet tank entering the extraction tank, improve the stability of the components of the extract in the extraction tank, and improve the extraction quality of the film material. In addition, the scraping rod is used to scrape off the liquid and foreign matter on the surface of the film material, and then the squeezing rubber roller is used to squeeze it, which can reduce the probability of foreign particles on the surface of the film material entering the third gap of the squeezing rubber roller and damaging the film material.

[0012] In an optional embodiment, two squeezing rubber rollers are arranged opposite to each other to form a third gap; and / or, the squeezing rubber roller and the guide roller are arranged opposite to each other to form the third gap.

[0013] In the above implementation process, a third gap can be formed by setting two squeezing rubber rollers at intervals, and the film material can be passed through the third gap between the two squeezing rubber rollers to squeeze out the residual liquid on the surface of the film material. A guide roller for guiding and conveying the film material is usually arranged in the inlet groove, and the film material usually moves around the roller surface of the guide roller. The squeezing rubber roller and the guide roller are arranged opposite to each other, and a third gap is formed between the squeezing rubber roller and the guide roller, so that the film material passes through the third gap when it moves around the guide roller, and the squeezing rubber roller can cooperate with the guide roller to squeeze the film material.

[0014] In an optional embodiment, the pressure of the squeezing rubber roller is 0.15-0.5 bar.

[0015] In the above implementation process, the pressure of the squeezing rubber roller is 0.15-0.5 bar, which can squeeze out the residual liquid in the film material and reduce the probability of damage to the film material during squeezing, thereby improving the quality of the film material.

[0016] In an optional embodiment, a plurality of sequentially arranged extraction tanks are provided in the housing, and a scraping mechanism is provided in each extraction tank, so that the membrane material passes through the scraping mechanism in the previous extraction tank to scrape off the extraction liquid and then enters the next extraction tank.

[0017] In the above implementation process, a multi-stage extraction tank is arranged in the box body, so that the membrane material can be extracted step by step, thereby improving the extraction quality. In addition, a scraping mechanism is arranged in each stage of the extraction tank. After the extraction is completed, the membrane material in the previous stage of the extraction tank passes through the scraping mechanism for scraping before entering the next stage of the extraction tank. The scraping mechanism scrapes away the residue on the surface of the membrane material, which can reduce the probability of the extract and foreign matter in the previous stage of the extraction tank entering the next stage of the extraction tank with the membrane material, improve the stability of the extract in each stage of the extraction tank, and improve the extraction quality of the diaphragm.

[0018] In combination with the first aspect, in an optional embodiment, at the rear end of the extraction tank, an outlet tank and a drying tank are sequentially arranged in the box body, and a scraping mechanism is arranged in the outlet tank so that the film material enters the drying tank after the scraping mechanism in the outlet tank scrapes off the extraction liquid; an exhaust fan is arranged in the drying tank.

[0019] In the above implementation process, an outlet slot and a drying slot are sequentially arranged at the rear end of the extraction slot, so that the film material extracted in the extraction slot can be passed into the outlet slot, and then passed into the drying slot from the outlet slot for drying. The outlet slot is arranged between the extraction slot and the drying slot, which can reduce the consumption of the extractant. An exhaust fan is arranged in the drying slot, which can extract the volatilized extractant in the drying slot, so as to facilitate the recycling of the extractant and improve environmental protection. In addition, a scraping mechanism is arranged in the outlet slot, and the film material is scraped before passing into the drying slot at the rear end, which can reduce the liquid content of the film material passing into the drying slot, improve the drying efficiency, and reduce the suction amount of the exhaust fan.

[0020] In combination with the first aspect, in an optional embodiment, a plurality of heating rollers are provided in the drying tank, and the plurality of heating rollers are arranged in two rows, and the plurality of heating rollers in the upper and lower rows are staggered so that the film material passing through the outlet slot can move around the heating rollers in an S shape.

[0021] In the above implementation process, two rows of staggered heating rollers are arranged in the drying tank, so that the film can move around the heating rollers in an S shape, which can not only continuously transport the film, but also heat and dry the film during transportation.

[0022] In an optional embodiment, a plurality of heating plates are vertically arranged in the drying tank, and a heating plate is arranged between each two adjacent heating rollers, for heating and drying the film surface between the upper row of heating rollers and the lower row of heating rollers.

[0023] In the above implementation process, a heating plate is vertically arranged between every two adjacent heating rollers, which can heat and dry the portion of the film material between the upper and lower rows of heating rollers, thereby improving the drying efficiency.

[0024] In an optional embodiment, the tension adjustment mechanism further includes a limiter, which is protrudingly disposed at at least one end of the swing path of the swing arm.

[0025] In the above implementation process, a limiter is protruding from at least one end of the swing path of the swing arm, and the limiter can limit the swing angle of the swing arm to prevent the swing amplitude of the swing arm from being too large and damaging the membrane material. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0027] Figure 1 A schematic plan view of an extraction device provided as an example of this application;

[0028] Figure 2 A first schematic diagram of tension adjustment of the tension adjustment mechanism provided in the example of the present application;

[0029] Figure 3 A second schematic diagram of tension adjustment of the tension adjustment mechanism provided in the example of this application.

[0030] Icons: 1-extraction device; 10-housing; 11-inlet slot; 111-first liquid outlet; 112-second liquid outlet; 12-extraction slot; 13-outlet slot; 14-drying slot; 20-tension adjustment mechanism; 21-first drive roller; 22-second drive roller; 23-gravity roller; 24-swing arm; 25-first gap; 26-limiting member; 30-scraping mechanism; 31-scraping rod; 311-second gap; 32-extrusion rubber roller; 321-third gap; 40-guide roller; 51-heating roller; 52-heating plate; 100-film material. DETAILED DESCRIPTION

[0031] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0033] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0034] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "top", "bottom", "front", "back", "outside", and "inside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description. They do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present application.

[0036] When the diaphragm is prepared by a wet process, the membrane material 100 is usually required to undergo a stretching process, an extraction process and a drying process in sequence.

[0037] For example, the membrane material 100 is stretched longitudinally and transversely into a film with a thickness of about 20-30um and a width of 4000mm, and then pulled into the extraction process. Usually, a guide roller is provided in the extraction chamber, and the membrane material 100 is continuously bent in an S shape through the guide roller to fully contact with the extractant in the extraction chamber. The extractant is usually dichloromethane, which replaces the pore-forming white oil in the membrane material 100. In order to prevent the loss of the extractant in the extraction chamber, an inlet chamber is usually provided at the front end of the extraction chamber, and a water seal is provided in the inlet chamber. The membrane material 100 passes through the chamber from the outside, and then enters each level of extraction chamber from the inlet chamber in turn. The flow direction of the extract is opposite to the movement direction of the membrane material 100. The extractant gradually overflows forward from the extraction chamber at the rear end and gathers at the inlet chamber.

[0038] However, when the film material 100 is passed into the extraction chamber for extraction, the displacement of white oil, the temperature difference between the inside and outside of the extraction chamber, and the fluctuation of the rotation speed ratio of the roller will cause the tension of the film material 100 to fluctuate greatly, which may easily cause problems such as wrinkles and film breakage.

[0039] In addition, since the extraction liquid overflows step by step to the inlet chamber and the membrane material 100 enters the chamber from the outside, foreign matter in the extraction liquid and dust attached to the surface of the membrane material 100 are easily accumulated at the inlet chamber. As the extraction proceeds, these foreign particles are likely to enter the extraction chamber at the rear end with the membrane material 100, and when moving around the roller in the extraction chamber, it is easy to scratch the membrane surface, affecting the quality of the membrane.

[0040] In addition, when the membrane material 100 enters the extraction chamber from the inlet chamber, part of the liquid in the inlet chamber will enter the rear extraction chamber along with the membrane material 100, which will affect the stability of the components of the extraction liquid in the extraction chamber and affect the extraction quality.

[0041] Therefore, the present application further improves the extraction device 1, so that the extraction quality of the diaphragm can be improved to a certain extent. In order to make the purpose, technical solution and advantages of the embodiment of the present application clearer, the technical solution in the embodiment of the present application will be clearly and completely described below in conjunction with the drawings in the embodiment of the present application.

[0042] See also Figure 1 The present application example provides an extraction device 1, including a housing 10, a tension adjustment mechanism 20 and a scraping mechanism 30.

[0043] Please continue to read Figure 1 An inlet tank 11 and an extraction tank 12 are provided in the box body 10.

[0044] Please combine Figures 1 to 3 The tension adjustment mechanism 20 is arranged outside the box body 10 at a position corresponding to the inlet slot 11. The tension adjustment mechanism 20 includes a first driving roller 21, a second driving roller 22, and a gravity roller 23 arranged between the first driving roller 21 and the second driving roller 22. The gravity roller 23 is swingably connected to the first driving roller 21 through a swing arm 24. A first gap 25 is formed between the gravity roller 23 and the second driving roller 22, so that the film material 100 can pass through the first gap 25 around the roller surface of the first driving roller 21 and the gravity roller 23, and pass through the inlet slot 11 around the roller surface of the second driving roller.

[0045] Please continue to read Figure 1 The scraping mechanism 30 includes a scraping rod 31. The scraping rod 31 is disposed in the inlet groove 11, and is used to allow the film material 100 to pass through the second gap 311 of the scraping rod 31 into the extraction groove 12, and scrape off the extract of the film material 100.

[0046] Using the extraction device 1 provided in the example of the present application, the film material 100 to be extracted is conveyed to the first driving roller 21. The film material 100 moves along the roller surface of the first driving roller 21 to the gravity roller 23, then passes through the first gap 25 from the roller surface of the gravity roller 23, and then moves to the second driving roller 22, moves around the roller surface of the second driving roller 22, and passes through the inlet slot 11. The film material 100 is conveyed by the guide roller in the inlet slot 11 and passes through the second gap 311 of the scraper rod 31. When the film material 100 passes through the second gap 311 of the scraper rod 31, the scraper rod 31 can scrape off the particulate foreign matter and liquid attached to the film material 100, and the film material 100 passing through the second gap 311 passes into the extraction tank 12 for extraction.

[0047] A tension adjustment mechanism 20 is provided at the front end of the entrance groove 11. Since the gravity roller 23 is swingably connected to the first driving roller 21 through the swing arm 24, when the tension of the film material 100 changes, the pressure applied by the film material 100 to the gravity roller 23 will also change, thereby causing the gravity roller 23 to swing to adjust the tension of the film material 100.

[0048] When the tension of the film 100 increases, the pressure exerted by the film 100 on the gravity roller 23 increases, which pushes the gravity roller 23 to swing away from the film 100, shortening the conveying path between the gravity roller 23 and the second driving roller 22, thereby releasing the tension of the film 100.

[0049] For example, Figure 3 As shown, when the tension of the film material increases, the pressure exerted by the film material 100 on the gravity roller 23 increases, which will push the gravity roller 23 to swing to the left end, shortening the conveying path between the gravity roller 23 and the second driving roller 22, thereby releasing the tension of the film material 100.

[0050] When the tension of the film 100 decreases, the pressure exerted by the film 100 on the gravity roller 23 decreases, and the gravity roller 23 tends to swing toward the film 100, increasing the conveying path between the gravity roller 23 and the second driving roller 22, thereby increasing the tension of the film 100.

[0051] For example, Figure 2 As shown, when the tension of the film material decreases, the pressure exerted by the film material 100 on the gravity roller 23 decreases, and the gravity roller 23 swings to the right end, increasing the conveying path between the gravity roller 23 and the second driving roller 22, thereby increasing the tension of the film material 100.

[0052] In some possible embodiments, a fixing frame may be provided on a side of the box body 10 close to the inlet slot 11 , and the first driving roller 21 and the second driving roller 22 may be fixed on the fixing frame.

[0053] Further, in some possible embodiments, one end of the swing arm 24 is rotatably connected to the end of the first driving roller 21 , and the other end of the swing arm is fixedly connected to the end of the gravity roller 23 .

[0054] Exemplarily, the swing arm includes a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod are connected to both ends of the first driving roller 21 and the gravity roller 23 respectively.

[0055] When the gravity roller 23 is not subjected to pressure from the film 100 , the swing arm 24 and the gravity roller 23 are located below the first driving roller 21 and are in an initial equilibrium position under the action of their own weight.

[0056] When the gravity roller 23 is pressed by the film material 100 , the gravity roller 23 will push the swing arm 24 to swing away from the film material 100 at a certain angle and then become stable.

[0057] The swing angle of the gravity roller 23 changes with the tension of the film material 100. When the tension of the film material 100 is large, the pressure applied to the gravity roller 23 is large, and the swing arm 24 tends to swing in the direction away from the initial equilibrium position, and the swing angle becomes larger. When the tension of the film material 100 decreases, the pressure applied to the gravity roller 23 decreases, and the swing arm 24 tends to swing toward the initial equilibrium position, and the swing angle becomes smaller.

[0058] Further, in order to reduce the probability of the film material 100 being damaged due to the excessive swing angle of the gravity roller 23, in a possible embodiment, please continue to refer to Figure 1-Figure 3 The tension adjustment mechanism 20 further includes a stopper 26 . The stopper 26 is protrudingly disposed at at least one end of the swing path of the swing arm 24 .

[0059] The swing path of the swing arm 24 refers to a circular surface with the connection point between the swing arm 24 and the first driving roller 21 as the center and the length of the swing arm 24 as the radius.

[0060] A limit piece 26 is protruding from the swing path. When the swing arm 24 moves to the limit piece 26 , the swing arm 24 cannot bypass the limit piece 26 and continue to swing due to the resistance of the limit piece 26 , thereby limiting the swing angles of the swing arm 24 and the gravity roller 23 .

[0061] Exemplarily, the limiting member 26 may be a column protruding from the fixing frame.

[0062] Exemplarily, the limiting member 26 is disposed on a side of the gravity roller 23 facing away from the film material 100 .

[0063] An inlet slot 11 and an extraction slot 12 are arranged in the housing 10 . The external membrane material 100 passes through the inlet slot 11 , and then passes through the extraction slot 12 from the inlet slot 11 .

[0064] In some possible embodiments, the housing 10 may be provided with an opening corresponding to the inlet slot 11 to facilitate the membrane material 100 to pass through the inlet slot 11. Similarly, the housing 10 may be provided with openings corresponding to the inlet slot 11 and the extraction slot 12 to facilitate the membrane material 100 to pass through the extraction slot 12.

[0065] Furthermore, in order to facilitate the transportation of the membrane material 100 , guide rollers 40 may be provided in the inlet tank 11 and the extraction tank 12 , so that the membrane material 100 can be pulled and transported by the guide rollers 40 .

[0066] For some possible embodiments, please refer to Figure 1 A first liquid outlet 111 may be provided at the bottom of the inlet groove 11 to facilitate discharge of the liquid in the inlet groove 11 .

[0067] Furthermore, a battery valve may be provided at the first liquid outlet 111, and a liquid level sensor (not shown in the figure) may be provided in the inlet tank 11. The liquid level sensor is connected to the battery valve signal, and when the liquid level sensor detects that the liquid level in the inlet tank 11 is higher than the upper limit of the set value, a signal is sent to the controller of the battery valve to control the battery valve to open, and the excess liquid in the inlet tank 11 is discharged from the first liquid outlet 111. Also, when the liquid level sensor detects that the liquid level in the inlet tank 11 is lower than the lower limit of the set value, a signal is sent to the controller of the battery valve to control the battery valve to close or adjust the opening of the battery valve, and reduce or stop the liquid in the inlet tank 11 from being discharged from the first liquid outlet 111.

[0068] Further, in a possible embodiment, please continue to refer to Figure 1 A second liquid outlet 112 may be provided at the top of the housing 10 corresponding to the inlet groove 11 .

[0069] A second liquid outlet 112 is provided at the top of the inlet groove 11 , which can ensure that the liquid in the inlet groove 11 does not overflow out of the box body 10 when the battery valve at the first liquid outlet 111 at the bottom fails.

[0070] The membrane material 100 at the inlet tank 11 passes through the scraping mechanism 30 and then enters the extraction tank 12. The scraping rod 31 in the scraping mechanism 30 can scrape off foreign matter and liquid attached to the membrane material 100, reducing the probability of foreign matter or liquid entering the extraction tank 12, thereby improving the quality of the diaphragm.

[0071] Please continue reading Figure 1In a possible embodiment, two scraping rods 31 are arranged opposite to each other to form a second gap 311. The film material 100 in the inlet tank 11 passes through the second gap 311 between the two scraping rods 31, and then enters the extraction tank 12. When the film material 100 passes through the second gap 311, the scraping rod 31 scrapes off foreign matter and liquid at the film material 100, which can reduce the probability of foreign matter and liquid entering the extraction tank 12 along with the film material 100.

[0072] Alternatively, in another possible embodiment, please continue to refer to Figure 1 The wiper rod 31 and the guide roller 40 are arranged opposite to each other to form a second gap 311 .

[0073] Further, in some possible embodiments, the wiper rod 31 may be selected from a metal rod.

[0074] Furthermore, the diameter of the wiper rod may be 78 mm.

[0075] The size of the second gap 311 between the wiper rod 31 and the guide roller 40 , or the second gap 311 between the wiper rod 31 and the wiper rod 31 , and the angle of the wiper rod 31 can be adjusted accordingly as needed.

[0076] In order to further improve the scraping efficiency of the scraping mechanism 30, in a possible embodiment, please continue to refer to Figure 1 The scraping mechanism 30 may also be provided with an extrusion rubber roller 32. The extrusion rubber roller 32 is provided at the rear end of the scraping rod 31, and is used to allow the film material 100 passing through the second gap 311 to pass through the third gap 321 of the extrusion rubber roller 32 into the extraction tank 12.

[0077] Furthermore, the squeezing pressure of the squeezing rubber roller 32 may be 0.15-0.5 bar.

[0078] Furthermore, the diameter of the squeezing rubber roller 32 may be 178 mm.

[0079] Further, in a possible embodiment, please continue to refer to Figure 1 The two squeezing rubber rollers 32 are arranged opposite to each other to form a third gap 321. The film material 100 passes through the second gap 311 and then passes through the third gap 321 between the two squeezing rubber rollers 32. The squeezing rubber rollers 32 squeeze the film material 100 to further scrape off the residual liquid on the surface of the film material 100.

[0080] Alternatively, in another possible embodiment, please continue to refer to Figure 1The squeezing rubber roller 32 and the guide roller 40 are arranged opposite to each other to form a third gap 321. The film material 100 passes through the second gap 311 and then passes through the third gap 321 between the squeezing rubber roller 32 and the guide roller 40. The squeezing rubber roller 32 squeezes the film material 100 and further scrapes off the liquid remaining on the surface of the film material 100.

[0081] The film material 100 penetrates into the extraction tank 12, and is pulled by the guide roller 40 in the extraction tank 12, and is fully contacted with the extraction liquid in the extraction tank 12 to be extracted.

[0082] Further, in some possible embodiments, please continue to refer to Figure 1 A plurality of sequentially arranged extraction tanks 12 are arranged in the housing 10 , and a scraping mechanism 30 is provided in each extraction tank 12 , so that the membrane material 100 passes through the scraping mechanism 30 in the extraction tank 12 of the previous stage and then enters the extraction tank 12 of the next stage after the extraction liquid is scraped off.

[0083] A scraping mechanism 30 is provided at each extraction tank 12 to reduce the probability of the liquid in the previous extraction tank 12 moving with the membrane material 100 to the next extraction tank 12 , thereby improving the stability of the extract in each extraction tank 12 .

[0084] Furthermore, in some possible embodiments, at the rear end of the extraction tank 12, an outlet tank 13 and a drying tank 14 are sequentially arranged in the housing 10, and a scraping mechanism 30 is arranged in the outlet tank 13, so that the film material 100 passes through the scraping mechanism 30 in the outlet tank 13 to scrape off the extraction liquid and then enters the drying tank 14.

[0085] The film material 100 after extraction in the extraction tank 12 passes into the outlet tank 13, and then passes into the drying tank 14 from the outlet tank 13. A water seal is provided in the outlet tank 13 to reduce the loss of the extractant. The film material in the outlet tank 13 passes through the scraping mechanism 30, and then passes into the drying tank 14 after scraping the liquid by the scraping mechanism 30, which can improve the drying efficiency.

[0086] Further, in some possible embodiments, please continue to refer to Figure 1 A plurality of heating rollers 51 are arranged in the drying tank 14 , and the plurality of heating rollers 51 are arranged in two rows, and the plurality of heating rollers 51 in the two rows are staggered so that the film material 100 passing through the outlet tank 13 can move around the heating rollers 51 in an S shape.

[0087] For further information, please refer to Figure 1 A plurality of heating plates 52 are vertically arranged in the drying tank 14 , and a heating plate 52 is arranged between each two adjacent heating rollers 51 , for heating and drying the film surface between the upper row of heating rollers 51 and the lower row of heating rollers 51 .

[0088] Furthermore, an exhaust fan (not shown) may be provided in the drying tank 14. The exhaust fan is provided in the drying tank 14 to extract the volatilized extractant in the drying tank 14 so as to recycle the extractant and improve environmental protection.

[0089] Because the scraping mechanism 30 scrapes off most of the extract on the surface of the film material 100 before entering the drying tank 14, the fan speed of the exhaust fan in the drying tank 14 can be reduced, and the energy consumption of the exhaust fan and the amount of waste gas recovered can be reduced.

[0090] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An extraction device, characterized in that: include: A box body, wherein an inlet tank and an extraction tank are arranged in the box body; A tension adjustment mechanism is arranged outside the box at a position corresponding to the inlet slot; the tension adjustment mechanism comprises a first drive roller, a second drive roller and a gravity roller arranged between the first drive roller and the second drive roller, the gravity roller is swingably connected to the first drive roller through a swing arm, and a first gap is formed between the gravity roller and the second drive roller, so that the film material can pass through the first gap around the roller surface of the first drive roller and the gravity roller, and pass through the inlet slot around the roller surface of the second drive roller; The scraping mechanism comprises a scraping rod; the scraping rod is arranged in the inlet groove and is used to enable the film material to pass through the second gap of the scraping rod into the extraction groove.

2. The extraction device according to claim 1, characterized in that The two wiper rods are arranged opposite to each other to form the second gap; And / or, the wiper rod and the guide roller are arranged opposite to each other to form the second gap.

3. The extraction device according to claim 1, characterized in that: The scraping mechanism further comprises an extruding rubber roller, which is arranged at the rear end of the scraping rod and is used to allow the film material passing through the second gap to pass through the third gap of the extruding rubber roller into the extraction tank.

4. The extraction device according to claim 3, characterized in that: The two squeezing rubber rollers are arranged opposite to each other to form the third gap; And / or, the extrusion rubber roller and the guide roller are arranged opposite to each other to form the third gap.

5. The extraction device according to claim 4, characterized in that The pressure of the squeezing rubber roller is 0.15-0.5 bar.

6. The extraction device according to any one of claims 1 to 5, characterized in that: The box body is provided with a plurality of extraction tanks arranged in sequence, and each extraction tank is provided with a scraping mechanism, so that the membrane material passes through the scraping mechanism in the extraction tank of the previous stage and then enters the extraction tank of the next stage after the extraction liquid is scraped off.

7. The extraction device according to claim 6, characterized in that At the rear end of the extraction tank, an outlet tank and a drying tank are sequentially arranged in the box body. The outlet tank is provided with the scraping mechanism so that the film material passes through the scraping mechanism in the outlet tank to scrape off the extraction liquid and then enters the drying tank; the drying tank is provided with an exhaust fan.

8. The extraction device according to claim 7, characterized in that A plurality of heating rollers are arranged in the drying tank, and the heating rollers are arranged in two rows, and the heating rollers in the two rows are staggered, so that the film material passing through the outlet slot can move around the heating rollers in an S shape.

9. The extraction device according to claim 8, characterized in that A plurality of heating plates are vertically arranged in the drying tank, and a heating plate is arranged between each two adjacent heating rollers, for heating and drying the film surface between the upper row of heating rollers and the lower row of heating rollers.

10. The extraction device according to claim 1, characterized in that: The tension adjustment mechanism further includes a limiter, which is protrudingly disposed at at least one end of the swing path of the swing arm.

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