Double-filter-screen film production equipment

Abstract

The utility model discloses double-filter-screen film production equipment which comprises a film compounding device and a plurality of film production devices, and a double-filter-screen film filtering device is arranged between each film production device and the film compounding device. The double-filter-screen film filtering device comprises a coarse filtering mechanism connected with the film production device, a fine filtering mechanism connected with the film compounding device and a connecting mechanism connected with the coarse filtering mechanism and the fine filtering mechanism, the coarse filtering mechanism comprises a coarse filter screen, and the fine filtering mechanism comprises a fine filter screen. According to the double-filter-screen film production equipment, the filter screen replacement period can be prolonged, production pauses are reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of equipment for producing thin films, and in particular to a dual-filter thin film production equipment. Background Technology

[0002] For multilayer film products, co-extrusion is often used in production.

[0003] In terms of equipment configuration, it will include multiple thin film production units and one thin film lamination unit.

[0004] Each film production unit produces a type of film raw material. Then, the film raw materials are passed sequentially or simultaneously through a film laminating unit to extrude multiple layers of film raw materials, forming a multilayer film.

[0005] To improve the purity of the materials, a filtration device is installed between each film production unit and film lamination unit. The filtration device includes a filter screen, which filters out impurities from the film.

[0006] After the equipment has been used for a period of time, impurities will clog the filter screen, and a new filter screen needs to be replaced. At the same time, the degree of clogging of each filter device is different, and the time to replace the new filter screen is different.

[0007] However, each time the filter needs to be replaced, production must be stopped, which affects production efficiency. Utility Model Content

[0008] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a dual-filter membrane production equipment that can extend the filter replacement cycle, reduce production downtime, and improve production efficiency.

[0009] A dual-screen film production device according to an embodiment of the present utility model:

[0010] The dual-filter membrane production equipment includes a membrane composite device and multiple membrane production devices. A dual-filter membrane filtration device is provided between each membrane production device and the membrane composite device. The dual-filter membrane filtration device includes a coarse filtration mechanism connected to the membrane production device, a fine filtration mechanism connected to the membrane composite device, and a connecting mechanism connecting the coarse filtration mechanism and the fine filtration mechanism. The coarse filtration mechanism includes a coarse filter screen, and the fine filtration mechanism includes a fine filter screen.

[0011] A dual-screen film production device according to an embodiment of the present utility model:

[0012] The coarse filtration mechanism includes a first flange, a second flange, and a plurality of first connecting columns for connecting the first flange and the second flange. The first flange is used to connect the film production device, and the second flange is used to connect the connecting mechanism. The coarse filter screen is disposed between the first flange and the second flange. The coarse filtration mechanism includes a first rocker plate rotatably connected to a first connecting column. The first rocker plate is provided with a first mounting hole and a second mounting hole. The coarse filter screen is disposed in both the first mounting hole and the second mounting hole.

[0013] The first rocker plate has a first state and a second state. In the first state, the film raw material of the film production device passes through the coarse filter screen of the first mounting hole. In the second state, the film raw material of the film production device passes through the coarse filter screen of the second mounting hole.

[0014] A dual-screen film production device according to an embodiment of the present utility model:

[0015] The coarse filtration mechanism further includes a first conveying pipe connected to the second flange. The membrane raw material filtered by the coarse filter screen is conveyed to the connecting mechanism through the first conveying pipe. The outer side of the first conveying pipe is covered with a first heating mechanism.

[0016] A dual-screen film production device according to an embodiment of the present utility model:

[0017] The first flange or the second flange is provided with a plurality of first notches, which are used for assembling and disassembling the coarse filter screen.

[0018] A dual-screen film production device according to an embodiment of the present utility model:

[0019] The first notch is located on the second flange, and there are two first notches, one for installing the coarse filter screen of the first mounting hole and the other for installing the coarse filter screen of the second mounting hole.

[0020] A dual-screen film production device according to an embodiment of the present utility model:

[0021] The fine filtration mechanism includes a third flange, a fourth flange, and a plurality of second connecting columns for connecting the third flange and the fourth flange. The third flange is used to connect the membrane composite device, and the fourth flange is used to connect the connecting mechanism. The fine filter screen is disposed between the third flange and the fourth flange. The fine filtration mechanism includes a second rocker plate rotatably connected to one of the second connecting columns. The second rocker plate is provided with a third mounting hole and a fourth mounting hole, and the fine filter screen is disposed in both the third mounting hole and the fourth mounting hole.

[0022] The second rocker has a third state and a fourth state, in which the film material from the connecting mechanism passes through the fine filter screen of the third mounting hole, and in the fourth state, the film material from the connecting mechanism passes through the fine filter screen of the fourth mounting hole.

[0023] A dual-screen film production device according to an embodiment of the present utility model:

[0024] The fine filtration mechanism also includes a second conveying pipe connected to the fourth flange. The film raw material from the connecting mechanism is conveyed to the fine filter screen through the second conveying pipe. The outer side of the second conveying pipe is covered with a second heating mechanism.

[0025] And / or, the third flange or the fourth flange is provided with a plurality of second notches, the second notches being used for assembling and disassembling the fine filter screen.

[0026] A dual-screen film production device according to an embodiment of the present utility model:

[0027] The fourth flange is equipped with a control valve on the incoming side, which is used to control the flow of the film raw material to or stop the flow to the fine filter screen.

[0028] A dual-screen film production device according to an embodiment of the present utility model:

[0029] The connecting mechanism includes a first half-shell and a second half-shell that fit together, and also includes a clamp that locks the first half-shell and the second half-shell together. The first half-shell and the second half-shell cooperate to form a first inlet that connects and communicates with the coarse filtration mechanism, a first outlet that connects and communicates with the fine filtration mechanism, and a first channel that connects the first inlet and the first outlet.

[0030] A dual-screen film production device according to an embodiment of the present utility model:

[0031] The diameter of the first channel is larger than the diameters of the first inlet and the first outlet, and the first channel forms a thin film raw material buffer chamber.

[0032] A dual-screen membrane production device according to an embodiment of the present invention has at least the following beneficial effects:

[0033] This invention, by setting up a fine filtration mechanism, can control impurities in the film raw materials within a suitable range, thus meeting the needs of film production.

[0034] This invention, by setting up a coarse filtration mechanism, can filter impurities in the membrane raw material in advance, reducing the impurities flowing to the fine filtration mechanism, delaying the clogging of the fine filter screen of the fine filtration mechanism, greatly extending the maintenance cycle, reducing the number of maintenance times, avoiding frequent production stoppages caused by the continuous maintenance of multiple filtration devices, and reducing the impact on production efficiency.

[0035] This utility model, by setting a connecting mechanism, also facilitates the connection between the coarse filtration mechanism and the fine filtration mechanism, reducing the difficulty of connecting the coarse filtration mechanism and the fine filtration mechanism. For example, the distance and direction of the coarse filtration mechanism and the fine filtration mechanism may differ, which meets the usage requirements and adapts to the situation where the distance and direction of the film production device and the film composite device are different.

[0036] This invention, by setting a connecting mechanism, allows for the replacement of the coarse filter screen without shutting down the machine, achieving maintenance without stopping the machine, further reducing production downtime, maintaining high production efficiency, reducing machine adjustments and debugging, saving materials, and reducing waste.

[0037] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the layout of a dual-screen film production equipment according to an embodiment of the present invention;

[0040] Figure 2 for Figure 1 A schematic diagram of a dual-screen membrane filtration device;

[0041] Figure 3 for Figure 1 Schematic diagram of the coarse and medium filtration mechanism;

[0042] Figure 4 for Figure 1 Schematic diagram of the medium and fine filtration mechanism;

[0043] Figure 5 for Figure 1 A schematic diagram of the connecting mechanism.

[0044] Reference numerals: 100 for film production apparatus; 110 for film composite apparatus; 120 for dual-screen film filtration apparatus; 130 for coarse filtration mechanism; 140 for fine filtration mechanism; 150 for connecting mechanism; 160 for first flange; 170 for second flange; 180 for first connecting column; 190 for first rocker plate; 200 for coarse filter screen; 210 for first conveying pipe; 220 for first notch; 230 for third flange; 240 for fourth flange; 250 for second connecting column; 260 for second rocker plate; 270 for fine filter screen; 280 for second notch; 290 for first half-shell; 300 for second half-shell; 310 for first inlet; 320 for first outlet. Detailed Implementation

[0045] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0046] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, this is only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] The following description, in conjunction with the accompanying drawings, describes a dual-filter membrane production device according to an embodiment of the present invention.

[0050] Reference Figure 1The present invention aims to provide an embodiment of a dual-filter membrane production equipment.

[0051] In this embodiment, the dual-filter membrane production equipment includes a membrane composite device 110 and multiple membrane production devices 100. The membrane composite device 110 is located in the center, while the multiple membrane production devices 100 are arranged around the membrane composite device 110. This makes reasonable use of space and facilitates the supply of materials to the membrane production devices 100, thus meeting the needs of production and manufacturing.

[0052] The film production apparatus 100 includes a raw material adding mechanism, a raw material mixing mechanism, and a raw material heating mechanism, thereby producing molten film raw materials. Then, the film raw materials enter the film laminating apparatus 110, and the mold of the film laminating apparatus 110 extrudes the film to form a multilayer film to meet different application or usage needs.

[0053] The output of the thin film production device 100 may contain particles due to uneven mixing or insufficient heating. If these particles are present on the multilayer film, they will affect the quality of the multilayer film.

[0054] Therefore, a filter device needs to be installed at the output end of the film production device 100, or in other words, a filter device needs to be installed between the film production device 100 and the film laminating device 110. The filter device traps these particles to prevent them from flowing to the film laminating device 110 and affecting the quality of the multilayer film.

[0055] During use, the filter will gradually become clogged as impurities accumulate, requiring the filter screen to be replaced to restore its throughput and meet the production requirements of multilayer films.

[0056] However, the film production equipment is equipped with multiple film production units 100, and correspondingly, multiple filtration units. Due to the varying degrees of clogging in the filtration units, multiple filtration units will need to have their filters replaced at different times. Each time the filters are replaced, production needs to be stopped, which causes the film production equipment to be frequently shut down and adjusted, seriously affecting the product quality and production efficiency of multilayer films.

[0057] In response, the dual-filter membrane production equipment of this embodiment has been improved in order to extend the filter replacement cycle, reduce production downtime, and improve production efficiency.

[0058] Reference Figures 2 to 5Specifically, a dual-screen membrane filtration device 120 is provided between each membrane production device 100 and the membrane composite device 110. The dual-screen membrane filtration device 120 includes a coarse filtration mechanism 130 connecting the membrane production device 100, a fine filtration mechanism 140 connecting the membrane composite device 110, and a connecting mechanism 150 connecting the coarse filtration mechanism 130 and the fine filtration mechanism 140. The coarse filtration mechanism 130 includes a coarse filter screen 200, and the fine filtration mechanism 140 includes a fine filter screen 270.

[0059] Reference Figure 3 Specifically, the coarse filtration mechanism 130 includes a first flange 160, a second flange 170, and a plurality of first connecting columns 180 for connecting the first flange 160 and the second flange 170. The first flange 160 is used to connect the film production device 100, and the second flange 170 is used to connect the connecting mechanism 150. A coarse filter screen 200 is disposed between the first flange 160 and the second flange 170. The coarse filtration mechanism 130 includes a first rocker plate 190 rotatably connected to a first connecting column 180. The first rocker plate 190 is provided with a first mounting hole and a second mounting hole, and both the first mounting hole and the second mounting hole are provided with coarse filter screens 200.

[0060] In use, the first rocker plate 190 has a first state and a second state. In the first state, the film raw material of the film production device 100 passes through the coarse filter screen 200 of the first mounting hole. In the second state, the film raw material of the film production device 100 passes through the coarse filter screen 200 of the second mounting hole.

[0061] In summary, by setting up a fine filtration mechanism 140, this utility model can control impurities in the film raw materials within a suitable range to meet the needs of film production.

[0062] By setting up a coarse filtration mechanism 130, this utility model can filter impurities in the membrane raw material in advance, reduce the impurities flowing to the fine filtration mechanism 140, delay the clogging of the fine filter screen 270 of the fine filtration mechanism 140, greatly extend the maintenance cycle, reduce the number of maintenance times, avoid the frequent production stoppages caused by the continuous maintenance of multiple filtration devices, and reduce the impact on production efficiency.

[0063] By providing a connecting mechanism 150, this utility model facilitates the connection between the coarse filtration mechanism 130 and the fine filtration mechanism 140, reducing the difficulty of connecting them. For example, the distance and direction of the coarse filtration mechanism 130 and the fine filtration mechanism 140 may differ, thus meeting usage requirements and adapting to situations where the distance between the film production device 100 and the film composite device 110 is difficult and the directions are diverse.

[0064] By setting up a connecting mechanism 150, this utility model can also replace the coarse filter screen 200 without stopping the machine, achieving non-stop maintenance, further reducing production downtime, keeping production efficiency at a high level, reducing machine adjustment and debugging, saving materials, and reducing waste.

[0065] In some specific embodiments of this utility model, the coarse filtration mechanism 130 may also include a first conveying pipe 210 connected to the second flange 170. The film raw material filtered by the coarse filter screen 200 is conveyed to the connecting mechanism 150 through the first conveying pipe 210. The first heating mechanism is covered on the outside of the first conveying pipe 210.

[0066] It is easy to understand that by setting the first conveying pipe 210, this embodiment can not only convey the film raw materials, but also lengthen the overall length of the double filter membrane filtration device 120, so that the film production device 100 is far away from the film composite device 110, making the space around the film production device 100 larger, which is convenient for production, and also convenient for mold switching and debugging of the film composite device 110.

[0067] The first heating mechanism can heat the film raw material to maintain its flow properties, while also helping to further melt the particles, prolong the heating time, reduce the size of the particles, and further delay the clogging of the fine filter screen 270, reduce the disassembly and maintenance of the fine filter screen 270, and reduce production stoppages and the impact of production stoppages.

[0068] Reference Figure 3 In some specific embodiments of this utility model, the first flange 160 or the second flange 170 may be provided with a plurality of first notches 220, which are used for disassembling and assembling the coarse filter screen 200.

[0069] It is easy to understand that by setting the first notch 220 in this embodiment, the first rocker plate 190 can be rotated by a small angle to align the first mounting hole or the second mounting hole with the first notch 220, which facilitates the installation and removal of the coarse filter screen 200.

[0070] In some specific embodiments of this utility model, the first notch 220 can be located at the second flange 170. That is, the insertion direction of the coarse filter screen 200 is opposite to the flow direction of the film material, while the removal direction of the coarse filter screen 200 is the same as the flow direction of the film material. Therefore, the coarse filter screen 200 is easier to remove from the first mounting hole.

[0071] If the removal direction of the coarse filter screen 200 is opposite to the flow direction of the membrane material, the membrane material will tightly press the coarse filter screen 200 into the first mounting hole or the second hole and fix it, increasing the difficulty of disassembling the coarse filter screen 200.

[0072] In some specific embodiments of this utility model, the number of first notches 220 can be two, one first notch 220 is used for the installation of the coarse filter screen 200 of the first mounting hole, and the other first notch 220 is used for the installation of the coarse filter screen 200 of the second mounting hole.

[0073] It is easy to understand that by setting two first notches 220 in this embodiment, the first rocker plate 190 can be rotated in different directions to make the corresponding mounting hole quickly find the corresponding first notch 220, which facilitates the replacement of the coarse filter screen 200 of the two mounting holes.

[0074] Reference Figure 4 In some specific embodiments of this utility model, the fine filtration mechanism 140 may include a third flange 230, a fourth flange 240, and a plurality of second connecting columns 250 for connecting the third flange 230 and the fourth flange 240. The third flange 230 is used to connect the membrane composite device 110, and the fourth flange 240 is used to connect the connecting mechanism 150. A fine filter screen 270 is provided between the third flange 230 and the fourth flange 240. The fine filtration mechanism 140 includes a second rocker plate 260 rotatably connected to a second connecting column 250. The second rocker plate 260 is provided with a third mounting hole and a fourth mounting hole, and both the third mounting hole and the fourth mounting hole are provided with fine filter screens 270.

[0075] The second rocker plate 260 has a third state and a fourth state. In the third state, the film material from the connecting mechanism 150 passes through the fine filter screen 270 of the third mounting hole. In the fourth state, the film material from the connecting mechanism 150 passes through the fine filter screen 270 of the fourth mounting hole.

[0076] It is easy to understand that, by adopting an arrangement similar to that of the coarse filtration mechanism 130, the fine filter 270 can be easily replaced, reducing manufacturing difficulty and manufacturing cost.

[0077] In terms of component design, apart from the difference between the coarse filter 200 and the fine filter 270, the fine filter mechanism 140 and the coarse filter mechanism 130 can be manufactured using the same drawings to reduce the types of components, facilitate manufacturing and maintenance, and reduce the types and quantities of spare parts.

[0078] In some specific embodiments of this utility model, the fine filtration mechanism 140 may further include a second conveying pipe connected to the fourth flange 240. The film raw material from the connecting mechanism 150 is conveyed to the fine filter screen 270 through the second conveying pipe, and the outer side of the second conveying pipe is covered with a second heating mechanism.

[0079] It is easy to understand that, by providing a second conveying pipe, this embodiment also facilitates the connection of the connecting mechanism 150, while reducing material usage and simplifying installation.

[0080] The addition of a second heating mechanism also keeps the film material warm and facilitates its flow.

[0081] In some specific embodiments of this utility model, the third flange 230 or the fourth flange 240 may be provided with a plurality of second notches 280, which are used for disassembling and assembling the fine filter screen 270.

[0082] It is easy to understand that by setting the second notch 280, the rotation range of the second rocker 260 is reduced, making it easier to install and remove the fine filter screen 270.

[0083] In some specific embodiments of this utility model, a control valve may be provided on the incoming side of the fourth flange 240. The control valve is used to control the flow direction of the film raw material or stop its flow to the fine filter screen 270.

[0084] It is easy to understand that, by setting a control valve in this embodiment, when it is necessary to replace the fine filter screen 270, the control valve can cut off the flow of the film raw material, prevent unfiltered film raw material from entering the film composite device 110, and prevent the product quality of the multilayer film from being affected.

[0085] Reference Figure 5 In some specific embodiments of this utility model, the connecting mechanism 150 may include a first half-shell 290 and a second half-shell 300 that hug each other, and also includes a clamp that locks the first half-shell 290 and the second half-shell 300 together. The first half-shell 290 and the second half-shell 300 cooperate to form a first inlet 310 that connects and communicates with the coarse filtration mechanism 130, a first outlet 320 that connects and communicates with the fine filtration mechanism 140, and a first channel that connects the first inlet 310 and the first outlet 320.

[0086] It is easy to understand that by setting the first half-shell 290 and the second half-shell 300 in this embodiment, it can be locked by clamping, which reduces the difficulty of installing the connecting mechanism 150 after completing the coarse filter mechanism 130 and the fine filter mechanism 140, and also reduces the difficulty of disassembling and assembling the connecting mechanism 150.

[0087] In some specific embodiments of this utility model, the diameter of the first channel can be larger than the diameters of the first inlet 310 and the first outlet 320, and the first channel forms a thin film raw material buffer chamber.

[0088] It is easy to understand that by improving the shape of the first channel, this embodiment can increase the volume or mass of the film raw material stored in the first channel, reduce the impact of film raw material output, and avoid affecting the production of multilayer films when switching the coarse filter 200. In other words, multilayer films can be continuously produced when switching the coarse filter 200.

[0089] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0090] The terms "first," "second," "third," "fourth," etc. (if applicable) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein.

[0091] It should also be noted that, in the description of this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0092] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may also include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or apparatus.

[0093] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0094] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A dual-screen membrane production equipment, characterized in that, The dual-filter membrane production equipment includes a membrane composite device (110) and multiple membrane production devices (100). Each membrane production device (100) is provided with a dual-filter membrane filtration device (120) between it and the membrane composite device (110). The dual-filter membrane filtration device (120) includes a coarse filtration mechanism (130) connected to the membrane production device (100), a fine filtration mechanism (140) connected to the membrane composite device (110), and a connecting mechanism (150) connecting the coarse filtration mechanism (130) and the fine filtration mechanism (140). The coarse filtration mechanism (130) includes a coarse filter screen (200), and the fine filtration mechanism (140) includes a fine filter screen (270).

2. The dual-filter membrane production equipment according to claim 1, characterized in that: The coarse filtration mechanism (130) includes a first flange (160), a second flange (170), and a plurality of first connecting columns (180) for connecting the first flange (160) and the second flange (170). The first flange (160) is used to connect the film production device (100), and the second flange (170) is used to connect the connecting mechanism (150). The coarse filter screen (200) is disposed between the first flange (160) and the second flange (170). The coarse filtration mechanism (130) includes a first rocker plate (190) rotatably connected to a first connecting column (180). The first rocker plate (190) is provided with a first mounting hole and a second mounting hole. The coarse filter screen (200) is disposed in both the first mounting hole and the second mounting hole. The first rocker (190) has a first state and a second state. In the first state, the film material of the film production device (100) passes through the coarse filter (200) of the first mounting hole. In the second state, the film material of the film production device (100) passes through the coarse filter (200) of the second mounting hole.

3. The dual-filter membrane production equipment according to claim 2, characterized in that: The coarse filtration mechanism (130) further includes a first conveying pipe (210) connected to the second flange (170). The film raw material filtered by the coarse filter screen (200) is conveyed to the connecting mechanism (150) through the first conveying pipe (210). The first conveying pipe (210) is covered with a first heating mechanism.

4. The dual-filter membrane production equipment according to claim 2, characterized in that: The first flange (160) or the second flange (170) is provided with a plurality of first notches (220), which are used for assembling and disassembling the coarse filter screen (200).

5. The dual-screen membrane production equipment according to claim 4, characterized in that: The first notch (220) is located on the second flange (170). There are two first notches (220), one for mounting the coarse filter (200) in the first mounting hole and the other for mounting the coarse filter (200) in the second mounting hole.

6. The dual-filter membrane production equipment according to claim 1, characterized in that: The fine filtration mechanism (140) includes a third flange (230), a fourth flange (240), and a plurality of second connecting columns (250) for connecting the third flange (230) and the fourth flange (240). The third flange (230) is used to connect the membrane composite device (110), and the fourth flange (240) is used to connect the connecting mechanism (150). The fine filter screen (270) is disposed between the third flange (230) and the fourth flange (240). The fine filtration mechanism (140) includes a second rocker plate (260) rotatably connected to one of the second connecting columns (250). The second rocker plate (260) is provided with a third mounting hole and a fourth mounting hole, and the fine filter screen (270) is disposed in both the third mounting hole and the fourth mounting hole. The second rocker (260) has a third state and a fourth state, in which film material from the connecting mechanism (150) passes through the fine filter (270) of the third mounting hole, and in the fourth state, film material from the connecting mechanism (150) passes through the fine filter (270) of the fourth mounting hole.

7. The dual-filter membrane production equipment according to claim 6, characterized in that: The fine filtration mechanism (140) also includes a second conveying pipe connected to the fourth flange (240). The film material from the connecting mechanism (150) is conveyed to the fine filter screen (270) through the second conveying pipe. The outer side of the second conveying pipe is covered with a second heating mechanism. And / or, the third flange (230) or the fourth flange (240) is provided with a plurality of second notches (280) for removing and installing the fine filter screen (270).

8. The dual-filter membrane production equipment according to claim 6, characterized in that: The fourth flange (240) is provided with a control valve on the incoming side, which is used to control the flow of the film raw material to or stop the flow to the fine filter screen (270).

9. The dual-filter membrane production equipment according to claim 1, characterized in that: The connecting mechanism (150) includes a first half-shell (290) and a second half-shell (300) that hug each other, and also includes a clamp that hugs and locks the first half-shell (290) and the second half-shell (300) together. The first half-shell (290) and the second half-shell (300) cooperate to form a first inlet (310) that connects and communicates with the coarse filtration mechanism (130), a first outlet (320) that connects and communicates with the fine filtration mechanism (140), and a first channel that communicates with the first inlet (310) and the first outlet (320).

10. A dual-screen membrane production equipment according to claim 9, characterized in that: The diameter of the first channel is larger than the diameter of the first inlet (310) and the first outlet (320), and the first channel forms a thin film raw material buffer chamber.

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