阅读说明：本技术 一种滤膜及其制备方法 (Filter membrane and preparation method thereof ) 是由 裴贵芝 于 2021-07-08 设计创作，主要内容包括：本发明涉及过滤膜技术领域,更具体的说是一种滤膜及其制备方法,一种滤膜制备方法,该方法包括以下步骤：步骤一：对上层滤膜进行抹平,将上层滤膜加热折弯；步骤二：对上层滤膜进行打孔,对下层滤膜进行打孔；步骤三：将上下两层滤膜的滤孔对齐贴合在一起；步骤四；将两层滤膜固定到一起,一种滤膜,一种滤膜由上层波纹状滤膜和下层水平滤膜组成,且上层波纹状滤膜和下层水平滤膜上的滤孔位置上下对应,可以让波纹形滤膜在进行过滤时,让过滤出的物质沿着弧形面滑落到波纹的下端,从而避免滤孔被堵住,过滤出的物质顺着波纹的下端直接滑落,便于对滤膜进行清理。(The invention relates to the technical field of filter membranes, in particular to a filter membrane and a preparation method thereof, and the preparation method of the filter membrane comprises the following steps: the method comprises the following steps: leveling the upper filter membrane, and heating and bending the upper filter membrane; step two: punching the upper filter membrane and the lower filter membrane; step three: aligning and sticking the filter holes of the upper and lower layers of filter membranes together; step four; fix two-layer filter membrane together, a filter membrane comprises upper ripple form filter membrane and lower floor's horizontal filter membrane, and corresponds about the filtration pore position on upper ripple form filter membrane and the horizontal filter membrane of lower floor, can let the ripple form filter membrane when filtering, lets the material of crossing the filter to the corrugated lower extreme along the arcwall landing to avoid the filtration pore to be plugged up, the material of crossing the filter is along the direct landing of corrugated lower extreme, is convenient for clear up the filter membrane.)

1. A method for preparing a filter membrane is characterized by comprising the following steps: the method comprises the following steps:

the method comprises the following steps: leveling the upper filter membrane, and heating and bending the upper filter membrane;

step two: punching the upper filter membrane and the lower filter membrane;

step three: aligning and sticking the filter holes of the upper and lower layers of filter membranes together;

step four; the two filter membranes were fixed together.

2. A process for the preparation of a filter membrane according to claim 1, characterised in that: the method also uses a filter membrane preparation device which comprises a support frame (130), a corrugated plate (110) and a movable template (120), wherein the movable template (120) is fixed on the support frame (130) through a hydraulic cylinder, the corrugated plate (110) slides on the support frame (130), the corrugated plate (110) and the movable template (120) are corrugated molds, and the corrugated plate (110) and the movable template (120) can move towards the inner side or the outer side simultaneously.

3. A process for the preparation of a filter membrane according to claim 2, characterised in that: the filter membrane preparation device further comprises a rotating rod (140) and a sliding frame (150), the rotating rods (140) are respectively rotated on the corrugated plate (110) and the movable template (120), and the rotating rods (140) are respectively rotated on the two sliding frames (150).

4. A process for the preparation of a filter membrane according to claim 3, characterised in that: the filter membrane preparation device further comprises a connecting plate (210), a screw rod (220) and a plurality of drilling devices (240), wherein the drilling devices (240) are all rotated on the connecting plate (210), and the connecting plate (210) and the screw rod (220) are in threaded transmission.

5. A process for the preparation of a filter membrane according to claim 4, characterised in that: the filter membrane preparation device further comprises a driving plate (230), a plurality of driving plates (230) are all arranged on the connecting plate (210) in a sliding mode, and the plurality of driving plates (230) are in threaded transmission with the plurality of drilling devices (240).

6. A process for the preparation of a filter membrane according to claim 5, characterised in that: the borer (240) consists of a screw rod (241), an annular knife (242) and a tip (243), wherein the tip (243) is positioned at the lower end of the annular knife (242), and the annular knife (242) is positioned at the lower end of the screw rod (241).

7. A process for the preparation of a filter membrane according to claim 5; the filter membrane preparation device further comprises conveying belts (310), rotating wheels (320) and driving wheels (340), wherein the rotating wheels (320) rotate on the two sliding frames (150) respectively, the two conveying belts (310) are in friction transmission with the rotating wheels (320) respectively, and the driving wheels (340) rotate on the two sliding frames (150) respectively.

8. A process for the preparation of a filter membrane according to claim 7, characterised in that: the filter membrane preparation device further comprises a fixing plate (410), a cam (420) and a plurality of hole puncher (430), wherein the hole puncher (430) is fixed on the fixing plate (410), and the two cams (420) are in friction transmission with the fixing plate (410).

9. A process for the preparation of a filter membrane according to claim 8, characterised in that: the filter membrane preparation device further comprises a supporting plate (510), a hot connection plate (520) and guide rollers (530), wherein the hot connection plate (520) is installed on the supporting plate (510) through a hydraulic cylinder, and the guide rollers (530) rotate on the supporting plate (510).

10. A filtration membrane prepared using a filtration membrane preparation process according to claim 9, wherein: the filter membrane consists of an upper-layer corrugated filter membrane and a lower-layer horizontal filter membrane, and the positions of filter holes on the upper-layer corrugated filter membrane and the lower-layer horizontal filter membrane correspond up and down.

Technical Field

The invention relates to the technical field of filter membranes, in particular to a filter membrane and a preparation method thereof.

Background

A filtration membrane production apparatus such as that described in publication No. 106237868B, comprising a coating mechanism including a roll shaft and a support, the support including a roll shaft cylinder and a connecting section, the connecting section being in a hollow tubular shape, a conduit connected to a storage tank being connected by a screw thread; the roller barrel is axially provided with an opening, the length of the opening is the length of the roller barrel, the width of the opening is smaller than the diameter of the roller shaft, the roller barrel is provided with a compression ring and a recovery ring with variable inner diameters from the opening, the inner diameter of the compression ring is gradually increased from top to bottom, and the inner diameter of the recovery ring is gradually reduced from top to bottom; the roll shaft penetrates through the opening and is arranged in the compression ring and the recovery ring, and a plurality of support frames are arranged on the other side of the roll shaft; the disadvantage of this patent is that it is not possible to process a layer of corrugated filter membrane.

Disclosure of Invention

The invention aims to provide a filter membrane and a preparation method thereof, which can process a layer of corrugated filter membrane.

The purpose of the invention is realized by the following technical scheme:

a method for preparing a filter membrane, comprising the steps of:

the method comprises the following steps: leveling the upper filter membrane, and heating and bending the upper filter membrane;

step two: punching the upper filter membrane and the lower filter membrane;

step three: aligning and sticking the filter holes of the upper and lower layers of filter membranes together;

step four; the two filter membranes were fixed together.

The utility model provides a filter membrane preparation facilities, including the buckled plate, the movable mould board, a support frame, dwang and carriage, buckled plate sliding connection is on the support frame, the movable mould board is installed on the support frame through two pneumatic cylinders, a plurality of dwangs rotate respectively and connect both ends about buckled plate and movable mould board, a plurality of dwangs rotate respectively and connect the upper and lower both ends at two carriages, two carriages sliding connection is both ends about the support frame respectively, the buckled plate is the ripple type, all be equipped with the through-hole on the arcwall face of buckled plate upper end, the movable mould board is the ripple type, all be equipped with the through-hole on the arcwall face of movable mould board upper end, be equipped with a plurality of backup pads on the buckled plate.

The utility model provides a filter membrane preparation facilities includes the connecting plate, the lead screw, the drive plate, the perforator, sliding block and collection box, two lead screws rotate respectively and connect both ends about the support frame, draw together screw drive between fishplate bar and two lead screws, a plurality of piercers all rotate to be connected on the connecting plate, a plurality of piercers respectively with a plurality of drive plate between screw drive, the equal sliding connection of a plurality of drive plates is on the connecting plate, a plurality of drive plates all pass through spring coupling with the connecting plate, the perforator is by the lead screw, annular sword and tip triplex, the lead screw is located the upper end of perforator, annular sword is located the centre of perforator, the tip is located the lower extreme of perforator, the equal sliding connection of a plurality of sliding blocks is at the lower extreme of movable mould board, a plurality of sliding blocks all pass through spring coupling with the movable mould board, per two sliding blocks are a set of, collection box fixed connection is at the lower extreme of movable mould board.

The utility model provides a filter membrane preparation facilities is including the transportation area, the rotation wheel, the connecting rod, drive wheel and sleeve, a plurality of rotation wheels rotate respectively and connect on two carriages, two transportation areas pass through the friction transmission with a plurality of rotation wheels respectively, two connecting rods are fixed connection respectively on two drive wheels of left end, sleeve sliding connection is between two connecting rods, a plurality of drive wheels rotate respectively and connect on two carriages, a plurality of drive wheels are respectively with passing through two belt transmission, it is protruding to be equipped with four arcs and four arcs on the drive wheel, a plurality of drive wheels respectively with two transportation between taking friction transmission.

The utility model provides a filter membrane preparation facilities includes the fixed plate, the cam, hole puncher and friction plate, be equipped with one row of through-hole II on the fixed plate, two cams pass through the connecting axle and connect, two cams all rotate and connect on the fixed plate, the equal sliding connection of a plurality of hole puncher is on the fixed plate, the equal fixed connection of a plurality of hole puncher is on the friction plate, friction plate and fixed plate pass through a plurality of spring coupling, friction plate and two cams pass through the friction transmission, a plurality of hole puncher are by tip II, annular sword II and slide bar are constituteed, fixed plate fixed connection is on the support frame.

The utility model provides a filter membrane preparation facilities includes backup pad, hot fishplate bar and guide roll, and backup pad fixed connection is on the fixed plate, and hot fishplate bar is corrugated, and hot fishplate bar passes through pneumatic cylinder II to be installed in the backup pad, and the guide roll rotates to be connected in the backup pad.

A filter membrane consists of an upper-layer corrugated filter membrane and a lower-layer horizontal filter membrane, wherein filter holes on the upper-layer corrugated filter membrane and the lower-layer horizontal filter membrane correspond to each other up and down.

The filter membrane and the preparation method thereof have the beneficial effects that:

the invention relates to a filter membrane and a preparation method thereof, wherein a corrugated filter membrane is fixed on a lower layer filter membrane, the filter holes of the corrugated filter membrane are arranged at the upper end, so that filtered substances can slide to the lower end of corrugations along an arc-shaped surface when the corrugated filter membrane is used for filtering, the filter holes are prevented from being blocked, the filtered substances can be prevented from being blocked on the filter holes when the filter membrane is cleaned, the filtered substances directly slide along the lower ends of the corrugations, the filter membrane is convenient to clean, meanwhile, the corrugated filter membrane has stronger bearing capacity and can better bear impact, the filter membrane cannot be normally filtered due to the fact that the filter membrane is broken by hard substances is avoided, an upper layer filter membrane can be formed, the upper layer filter membrane and the lower layer filter membrane can be perforated, the support can be provided when the upper layer filter membrane is transported, the upper layer filter membrane is transported through a plurality of driving wheels, and the shape of the upper layer filter membrane can be effectively protected, meanwhile, the drill can be cleaned, and filter membrane fragments are prevented from being stuck on the drill.

Drawings

The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a flow diagram of a method of preparing a filter membrane according to the present invention;

FIG. 2 is a schematic diagram of a filter membrane according to the present invention;

FIG. 3 is a schematic view of a corrugated plate of a filtration membrane preparation apparatus according to the present invention;

FIG. 4 is a schematic view of a driving plate of a filter membrane preparing apparatus according to the present invention;

FIG. 5 is a schematic view of a drilling machine of a filter membrane preparation apparatus according to the present invention;

FIG. 6 is a schematic view of a movable template of a filter membrane preparation apparatus according to the present invention;

FIG. 7 is a schematic view of a slide block of a filter membrane preparation apparatus according to the present invention;

FIG. 8 is a schematic view of a sliding frame of a membrane preparation apparatus according to the present invention;

FIG. 9 is a schematic view of a driving wheel of a filtration membrane preparation apparatus according to the present invention;

FIG. 10 is a schematic view of a cam of a filter membrane preparation apparatus according to the present invention;

FIG. 11 is a schematic view of a hole puncher for a filter membrane preparation apparatus according to the present invention;

FIG. 12 is a schematic view of a hot plate 520 of a filter preparation apparatus according to the present invention;

FIG. 13 is a schematic view of a support frame of a filtration membrane preparation apparatus according to the present invention.

In the figure:

a corrugated plate 110; a movable die plate 120; a support frame 130; rotating the rod 140; a carriage 150;

a connecting plate 210; a screw rod 220; a driving board 230; a drill 240; a slider 250; a recovery tank 260;

a conveyor belt 310; a rotating wheel 320; a connecting rod 330; a drive wheel 340; a sleeve 350;

a fixing plate 410; a cam 420; a punch 430; a friction plate 440;

a support plate 510; a heat-bonded plate 520; and a guide roller 530.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1;

a method for preparing a filter membrane, comprising the steps of:

the method comprises the following steps: leveling the upper filter membrane, and heating and bending the upper filter membrane;

step two: punching the upper filter membrane and the lower filter membrane;

step three: aligning and sticking the filter holes of the upper and lower layers of filter membranes together;

step four; the two filter membranes were fixed together.

As shown in fig. 2;

a filter membrane consists of an upper-layer corrugated filter membrane and a lower-layer horizontal filter membrane, wherein filter holes on the upper-layer corrugated filter membrane and the lower-layer horizontal filter membrane are in up-down correspondence;

normal filter membrane is when filtering, the filtration pore is blockked up easily, the longer filtration efficiency that leads to filterable time is lower more, need frequently change the filter membrane, not only extravagant filter membrane still consumes staff's time and energy, through fixing corrugated filter membrane on lower floor's filter membrane, the filtration pore of corrugated filter membrane is in the upper end, can let corrugated filter membrane when filtering, let the material of crossing filter out to the ripple lower extreme along the arcwall landing, thereby avoid the filtration pore to be stopped up, and can also prevent the material card of crossing filter out when clearing up the filter membrane on the filtration pore, make the material of crossing filter out directly the landing along corrugated lower extreme, be convenient for clear up the filter membrane, it is further, curved filter membrane is when filtering, bearing capacity can be better bear the striking, avoid the filter membrane to be pounded by hard object and to lead to normally filtering.

As shown in fig. 3 and 8;

the filter membrane preparation method also uses a filter membrane preparation device, which comprises a corrugated plate 110, a movable template 120, a support frame 130, rotating rods 140 and sliding frames 150, wherein the corrugated plate 110 is connected to the support frame 130 in a sliding manner, the movable template 120 is installed on the support frame 130 through two hydraulic cylinders, the rotating rods 140 are respectively connected to the left end and the right end of the corrugated plate 110 and the movable template 120 in a rotating manner, the rotating rods 140 are respectively connected to the upper end and the lower end of the sliding frames 150 in a rotating manner, the two sliding frames 150 are respectively connected to the left end and the right end of the support frame 130 in a sliding manner, the corrugated plate 110 is corrugated, through holes 111 are formed in the arc-shaped surface at the upper end of the corrugated plate 110, the movable template 120 is corrugated, the arc-shaped surface at the upper end of the movable template 120 is provided with the through holes 111, and the corrugated plate 110 is provided with a plurality of support plates 112;

the device can process the upper film into a corrugated shape, the upper film passes through the space between the corrugated plate 110 and the movable template 120, two hydraulic cylinders extend to drive the movable template 120 to move upwards, the movable template 120 moves upwards to drive the plurality of rotating rods 140 to rotate, the plurality of rotating rods 140 rotate to drive the two sliding frames 150 to move outwards, the two sliding frames 150 move outwards to drive the rest plurality of rotating rods 140 to rotate, the rest plurality of rotating rods 140 rotate to drive the corrugated plate 110 to move downwards, the corrugated plate 110 and the movable template 120 press close to the middle to clamp the upper film, because the corrugated plate 110 and the movable template 120 are both corrugated, the corrugated plate 110 and the movable template 120 clamp the upper film to plastically deform the upper film into a corrugated shape, meanwhile, a heating device is arranged in the movable template 120, the film is easier to deform through the heating film, and the film shape is more stable after being changed, the corrugated filter film, can have stronger shock attenuation nature through the arcwall face, can effectively avoid the damage that is leaded to by the foreign matter device in filtering process.

As shown in fig. 4, 5, 6 and 7;

a filter membrane preparation device comprises a connecting plate 210, screw rods 220, driving plates 230, broaches 240, sliding blocks 250 and a recycling box 260, wherein the two screw rods 220 are respectively and rotatably connected to the left end and the right end of a supporting frame 130, the connecting plate 210 and the two screw rods 220 are in threaded transmission, the broaches 240 are respectively and rotatably connected to the connecting plate 210, the broaches 240 are respectively and rotatably in threaded transmission with the driving plates 230, the driving plates 230 are respectively and slidably connected to the connecting plate 210, the driving plates 230 are respectively and rotatably connected to the connecting plate 210 through springs, the broaches 240 comprise three parts including screw rods 241, annular cutters 242 and cusps 243, the screw rods 241 are positioned at the upper ends of the broaches 240, the annular cutters 242 are positioned in the middles of the broaches 240, the cusps 243 are positioned at the lower ends of the broaches 240, the sliding blocks 250 are respectively and slidably connected to the lower ends of movable templates 120, the sliding blocks 250 are respectively and the movable templates 120 through springs, every two sliding blocks 250 are in one group, and the recycling box 260 is fixedly connected to the lower end of the movable template 120;

after the plasticity of the upper layer film is finished, the two screw rods 220 rotate to drive the connecting plate 210 to move downwards, the connecting plate 210 moves downwards to drive the plurality of drills 240 to move downwards, the plurality of drills 240 respectively correspond to the through holes 111 on the corrugated plate 110 one by one, the connecting plate 210 moves downwards to drive the plurality of driving plates 230 to move downwards, the plurality of driving plates 230 move downwards for a section and then contact the plurality of supporting plates 112, the connecting plate 210 continues to move downwards to limit the plurality of driving plates 230 from moving compression springs, the plurality of driving plates 230 are driven to move downwards through the elastic force of the springs, the plurality of driving plates 230 move downwards to drive the corrugated plate 110 to move downwards, so that the corrugated plate 110 and the movable mold plate 120 are attached more tightly, gaps are avoided, then the plurality of drills 240 move downwards, the plurality of screw rods 241 are respectively in transmission with the threads of the driving plates 230, and the plurality of screw rods 241 move downwards and rotate simultaneously, the plurality of screw rods 241 move downwards and rotate simultaneously to drive the annular knife 242 and the tip 243 to move downwards and rotate simultaneously, the tip 243 contacts with the film first to break a hole in the film, so that the annular knife 242 can cut the film more conveniently, the phenomenon that the annular knife 242 directly cuts the film easily causes stretching of the film and damages other positions on the film except for a filter hole, the filter film is damaged and cannot be used normally is avoided, the annular knife 242 and the tip 243 can rotate when the film is punched, the film can be punched more smoothly and safely, punching efficiency and protection of the film are improved, after the film is punched, film fragments falling from hole drilling are easily adhered to the annular knife 242, when the film fragments are accumulated too much, the annular knife 242 cannot be used normally, when the film is drilled continuously, the film is damaged, unnecessary loss is caused, the annular knife 242 moves downwards to drive the two sliding blocks 250 to move towards two sides, annular knife 242 upwards moves when reseing, and at this moment two sliding blocks 250 through the subsides that spring force will be inseparable on annular knife 242, clear up the film piece of adhesion on the annular knife 242, all film pieces can all fall in collection box 260, are convenient for concentrate the clearance to the film piece, avoid the film piece to fly in disorder everywhere simultaneously and cause the trouble to the staff.

As shown in fig. 8 and 9;

a filter membrane preparation device comprises conveying belts 310, rotating wheels 320, connecting rods 330, driving wheels 340 and sleeves 350, wherein the rotating wheels 320 are respectively and rotatably connected to two sliding frames 150, the two conveying belts 310 are respectively in friction transmission with the rotating wheels 320, the two connecting rods 330 are respectively and fixedly connected to the two driving wheels 340 at the left end, the sleeves 350 are slidably connected between the two connecting rods 330, the driving wheels 340 are respectively and rotatably connected to the two sliding frames 150, the driving wheels 340 are respectively in transmission with the two belts, the driving wheels 340 are respectively provided with four arc-shaped grooves and four arc-shaped bulges, and the driving wheels 340 are respectively in friction transmission with the two conveying belts 310;

after the filter membrane is formed, the corrugated plate 110 and the movable template 120 move towards two sides, the limitation to the filter membrane is lost, the filter membrane cannot be influenced by the corrugated plate 110 and the movable template 120 in the moving process, the filter membrane shape is prevented from changing due to the contact with the corrugated plate 110 and the movable template 120, the filter membrane shape is not uniform enough, but the filter membrane loses support after the corrugated plate 110 and the movable template 120 move towards two sides, the filter membrane can fall downwards due to the self gravity of the filter membrane, so that the shape of the filter membrane is changed, after the two sides are moved by the corrugated plate 110 and the movable template 120, the two sliding frames 150 move towards the middle, and the filter membrane can be sufficiently supported without the two sliding frames 150 being positioned at the lower end of the filter membrane, all the driving wheels 340 are driven to rotate by one driving wheel 340, the driving wheels 340 rotate to drive the filter membrane to move, because the shapes of the driving wheels 340 are coincided with the corrugated shapes of the filter membrane, so that the driving wheels 340 rotate to drive the filter membrane to move in the moving process, can not damage the current shape of filter membrane, two drive wheels 340 of left end are connected through connecting rod 330 and sleeve 350, make the distance between two drive wheels 340 change the back, still can link together and drive mutually, just so can guarantee that a plurality of drive wheels 340 rotate simultaneously, it is stable to transport the filter membrane, furthermore, a plurality of drive wheels 340 rotate and drive the filter membrane and remove, drive wheel 340 rotates in-process and transports area 310 contact, it rotates to drive transport area 310 through friction transmission, avoid the in-process of drive wheel 340 transportation filter membrane to take place the circumstances such as skid, make the transportation of filter membrane in stable effective, the improvement is to the protection of filter membrane form.

As shown in fig. 10 and 11;

a filter membrane preparation device comprises a fixing plate 410, cams 420, hole punches 430 and a friction plate 440, wherein a row of through holes II 411 are arranged on the fixing plate 410, the two cams 420 are connected through a connecting shaft 421, the two cams 420 are rotatably connected to the fixing plate 410, the hole punches 430 are slidably connected to the fixing plate 410, the hole punches 430 are fixedly connected to the friction plate 440, the friction plate 440 and the fixing plate 410 are connected through a plurality of springs, the friction plate 440 and the two cams 420 are in friction transmission, the hole punches 430 are composed of a pointed end II 431, an annular knife 432 II and a sliding rod 433, and the fixing plate 410 is fixedly connected to a support frame 130;

only the corrugated filter membrane can not stably maintain the corrugated shape, the upper corrugated filter membrane can stably maintain the shape by connecting a lower filter membrane with the corrugated filter membrane, in order to align the filter holes of the lower filter membrane with the filter holes of the corrugated filter membrane, a movable template 120 is arranged below the corrugated filter membrane and can not simultaneously punch holes, so that the friction plate 440 is driven to move by rotating two cams 420, the friction plate 440 moves to drive a plurality of hole punches 430 to move, the lower filter membrane is punched by moving the plurality of hole punches 430, the hole punches 430 comprise a pointed end II 431, an annular knife 432 II and a sliding rod 433, so that the pointed end II 431 firstly contacts with the membrane to break a hole in the membrane, the annular knife 432 II can more conveniently cut the membrane, the annular knife 432 II is prevented from directly cutting the membrane to easily cause stretching of the membrane, and other positions on the membrane except the filter holes are damaged, then the two cams 420 rotate to lose the support of the friction plate 440, and the friction plate 440 is reset by the elastic force of a plurality of springs, so as to circularly and repeatedly perforate the lower filter membrane.

As shown in fig. 12 and 13;

a filter membrane preparation device comprises a support plate 510, a hot connection plate 520 and guide rollers 530, wherein the support plate 510 is fixedly connected to a fixing plate 410, the hot connection plate 520 is corrugated, the hot connection plate 520 is installed on the support plate 510 through a hydraulic cylinder II, and the guide rollers 530 are rotatably connected to the support plate 510;

as shown in fig. 13, the processing route of the upper layer of corrugated filter membrane and the lower layer of filter membrane is that the upper layer of corrugated filter membrane moves horizontally backwards for processing, the lower layer of filter membrane moves upwards first for punching and then rotates backwards through the guide of the guide roller 530, at this time, the upper layer of corrugated filter membrane and the lower layer of filter membrane are overlapped, the hot connection plate 520 is driven by the hydraulic cylinder ii to move downwards, and the hot connection plate 520 moves downwards to fix the contact position of the upper layer of corrugated filter membrane and the lower layer of filter membrane, so that the shape of the upper layer of corrugated filter membrane is fixed, and the upper layer of corrugated filter membrane is more stable when being filtered.