阅读说明：本技术 一种一次切平中空纤维帘式膜的切丝装置与方法 (Shredding device and method for once cutting flat hollow fiber curtain type membrane ) 是由 徐山田 沈红梅 李芸芳 徐锦锦 董文龙 吴昊 于 2020-05-18 设计创作，主要内容包括：本发明涉及膜分离技术领域,尤其涉及并公开了一种一次切平中空纤维帘式膜的切丝装置,包括切丝机体、圆形旋转刀,还包括压料块、下支撑块和扶料块,下支撑块用于支撑放置其上的膜片,压料块用于将膜片压紧固定在下支撑块上露出膜片头部待切,圆形旋转刀刀面与膜片轴向方向垂直,扶料块固定连接在切丝机体上,一端超出圆形旋转刀之外,扶料块用于切丝时将相应位置的膜片头部抬至圆形旋转刀刃口处进行切割。本发明还公开了一种切丝方法,包括膜片装夹和膜片切平两个步骤。本发明的一种一次切平中空纤维帘式膜的切丝装置与方法,无需预先捆扎,在保持膜丝内孔圆整度,保证膜丝性能的同时,可以高效快速地对任意宽度的膜片进行连续切割,切头齐整,过程简单可控。(The invention relates to the technical field of membrane separation, and particularly relates to and discloses a shredding device for once cutting flat hollow fiber curtain type membranes, which comprises a shredder body, a circular rotary cutter, a material pressing block, a lower supporting block and a material supporting block, wherein the lower supporting block is used for supporting a membrane placed on the lower supporting block, the material pressing block is used for pressing and fixing the membrane on the lower supporting block to expose the head of the membrane to be cut, the cutter surface of the circular rotary cutter is vertical to the axial direction of the membrane, the material supporting block is fixedly connected to the shredder body, one end of the material supporting block exceeds the circular rotary cutter, and the material supporting block is used for lifting the head of the membrane at the corresponding position to the position of a circular. The invention also discloses a shredding method which comprises two steps of clamping the diaphragm and flattening the diaphragm. The device and the method for cutting the hollow fiber curtain type membrane flat at one time do not need to be bundled in advance, can efficiently and quickly cut the membrane sheets with any width continuously while keeping the roundness of the inner hole of the membrane wire and ensuring the performance of the membrane wire, and have simple and controllable process.)

1. The utility model provides a once cut shred device of flat hollow fiber curtain membrane, includes filament cutter body (5), circular rotatory sword (7), and circular rotatory sword (7) are located the head of filament cutter body (5), its characterized in that: still including pressing material piece (4), lower support block (2) and support block (8), lower support block (2) are used for supporting diaphragm (1) of placing it on, press material piece (4) to be used for pressing diaphragm (1) fastening to expose diaphragm (1) head on lower support block (2) and wait to cut, circular rotating knife (7) knife face is perpendicular with diaphragm (1) axial direction, support block (8) fixed connection is on filament cutter body (5), one end surpasss outside circular rotating knife (7), support block (8) are used for lifting the diaphragm (1) head of corresponding position to circular rotating knife (7) blade department and cutting when shredding.

2. A filament cutter for once cutting flat a hollow fiber curtain film according to claim 1, wherein: the tobacco shred cutting machine is characterized by further comprising a guide mechanism (10) and a connecting block (9), wherein the guide of the guide mechanism (10) is perpendicular to the axial direction of the membrane (1), and the connecting block (9) is fixedly connected to the shred cutting machine body (5) and is in sliding connection with the guide mechanism (10).

3. A filament cutter for once cutting flat a hollow fiber curtain film according to claim 1, wherein: the lower supporting block (2) is provided with a limiting groove (3), and the diaphragm (1) is arranged in the limiting groove (3).

4. A filament cutter for once cutting flat a hollow fiber curtain film according to claim 1, wherein: and a soft elastic layer (6) is arranged at the bottom of the material pressing block (4).

5. A filament cutter for once cutting flat a hollow fiber curtain film according to claim 1, wherein: the material supporting block (8) is obliquely arranged on the outer side of the knife face of the circular rotary knife (7) to form an outer knife edge gap with the outer side of the knife face of the circular rotary knife (7), and the included angle between the front side face of the material supporting block and the advancing direction of the shredder body (5) is 135 degrees and 175 degrees.

6. A filament cutter for once cutting flat a hollow fiber curtain film according to claim 1, wherein: the knife face of the circular rotary knife (7) is parallel to the front side face of the lower supporting block (2) and the front side face of the material pressing block (4), an inner cutting edge gap of 0.02-2 mm is formed between the knife face of the circular rotary knife (7) and the front side face of the lower supporting block (2), and the distance between the knife face of the circular rotary knife and the front side face of the material pressing block (4) is 0-40 mm.

7. A filament cutter for once cutting flat a hollow fiber curtain film according to claim 1, wherein: the circular rotating knife is characterized by further comprising a knife stone (11), wherein the knife stone (11) is fixed at the head of the shredder body (5) and is elastically pressed on the knife surface of the circular rotating knife (7).

8. A shredding method for once cutting flat hollow fiber curtain type membrane is characterized in that: the method comprises the following steps:

1) clamping the membrane: putting a hollow fiber curtain type membrane diaphragm (1) which is prepared in advance into a limiting groove (3) of a lower supporting block (2), and pressing the diaphragm (1) by a pressing block (4) with a soft elastic layer (6) arranged at the bottom to ensure that an inner hole of the membrane is round and expose the head of the diaphragm (1) to be cut;

2) cutting the film into flat pieces: the shredder body (5) moves forwards along the guide mechanism (10), the exposed head of the diaphragm (1) is lifted to the cutting edge of the circular rotary knife (7) when the material supporting block (8) moves to the diaphragm (1), and the cutting edge of the circular rotary knife (7) cuts the diaphragm (1) flat at one time due to the internal and external fixed supporting functions of the lower supporting block (2) and the material supporting block (8).

Technical Field

The invention relates to the technical field of membrane separation, in particular to a shredding device and a shredding method for once cutting flat hollow fiber curtain type membranes.

Background

Hollow fiber membranes are widely used for separation, concentration and purification of substances. The hollow fiber membrane is a fibrous membrane with a self-supporting function, and raw water flows outside or in the cavity of the hollow fiber under pressure. The hollow fiber membrane is required to be cut into threads and encapsulated to be manufactured into an assembly, wherein the assembly mainly comprises a curtain type membrane. The end part of the hollow fiber membrane is used as a water outlet, the roundness of the inner hole directly influences the water yield of the membrane wire, and the length difference of the membrane wire directly influences the glue amount required by encapsulation and the height of the water collecting pipe.

At present, the cutting method of the hollow fiber membrane is mainly manually finished, the membrane filaments are clamped and then cut by a blade by one worker, the method completely depends on manual work, the product quality is difficult to guarantee, the cutting edge of the blade is easy to blunt, and the blade loss is huge.

The Chinese patent application (201711263043.9) discloses a cutting method of a film wire cutting machine, which comprises the following process steps: s1, film silk bundling: the prepared membrane filaments are assembled into a bundle shape through the clamping sleeve, the tail of the bundle membrane filaments is tightened by a rubber band, and then the bundle membrane filaments are placed on the movable disc, so that the cut can be kept flush in the cutting process; s2, clamping the membrane wires: clamping the bundle-shaped membrane wire formed in the S1 at a bayonet of a clamping mechanism; s3, limiting and positioning: and the control switch is turned on, the movable disc is moved to the limiting position of the limiting mechanism by the positioning mechanism, the end part of the formed bundled membrane wire is controlled on one tangent plane by the limiting mechanism, and the bundled membrane wire is further locked by the clamping mechanism, so that the membrane wire is prevented from scattering in the cutting process.

The above shredding process has the following disadvantages: in order to ensure the integrity of the inner hole of the membrane silk, the membrane silk needs to be firstly packaged into a bundle shape and then cut into threads, and the process is complex; after the shredding is finished, the film needs to be rearranged into sheets and packaged again, so that the flatness of the film is low.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the filament cutting device and the method for cutting the hollow fiber curtain type membrane at one time, which can conveniently keep the roundness of the inner hole of the membrane filament, ensure the membrane filament performance of the curtain type membrane, greatly reduce the loss of a blade and have simple and controllable process.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a shred device of once cutting off flat hollow fiber curtain-type membrane, including the filament cutter body, circular rotating knife is located the head of filament cutter body, still include the pressure material piece, lower supporting shoe and holding up the piece, the lower supporting shoe is used for supporting the diaphragm of placing it on, the pressure material piece is used for compressing tightly the diaphragm and fixes and expose the diaphragm head on the lower supporting shoe and wait to cut, circular rotating knife face is perpendicular with diaphragm axial (the length direction of diaphragm silk is the diaphragm axial) direction, holding up piece fixed connection on the filament cutter body, one end exceedes outside circular rotating knife, it lifts the diaphragm head of corresponding position to circular rotating knife edge department and cuts when being used for shredding to hold up the piece. The integrity of the inner hole of the membrane can be kept while the membrane filaments with inconsistent shapes and heights are fixed by adjusting the tightness of the material pressing block, the membrane sheets with any width can be continuously cut according to requirements without being bundled in advance. The cutting edge of the circular rotary knife is not easy to wear and high in cutting efficiency. The material supporting block and the lower supporting block are fixedly supported at the knife face to form shearing force, so that cutting is convenient, rapid and complete.

Preferably, the device further comprises a guide mechanism and a connecting block, the guide of the guide mechanism is perpendicular to the axial direction of the membrane, and the connecting block is fixedly connected to the shredder body and is in sliding connection with the guide mechanism. The circular rotating knife moves directionally on the guide mechanism, so that the consistency of the length of the diaphragm can be ensured.

Preferably, the lower supporting block is provided with a limiting groove, and the diaphragm is arranged in the limiting groove. The limiting device is used for limiting and preventing the diaphragm from moving and rolling.

Preferably, the bottom of the material pressing block is provided with a soft elastic layer. The soft elastic layer further ensures that the membrane filaments are not deformed in the compressing process, and the inner pores of the membrane are kept round.

Preferably, the guide block is obliquely arranged on the outer side of the circular rotary cutter surface, an outer edge gap is formed between the guide block and the outer side of the circular rotary cutter surface, and the included angle between the front side surface of the guide block and the advancing direction of the shredder body is 135-175 degrees. The inclined material supporting block is matched with the circular knife face more easily, the diaphragm head at the corresponding position is lifted to the circular rotary knife edge in the advancing process, the material supporting block is arranged on the outer side of the circular rotary knife face to form fixed support for the diaphragm head on the outer side of the knife face, and the material supporting block is matched with the inner side support of the lower supporting block to form inner and outer support of a cutting edge and facilitate cutting.

Preferably, the circular rotary knife face is parallel to the front side face of the lower support block and the front side face of the material pressing block, an inner cutting edge gap of 0.02-2 mm is formed between the circular rotary knife face and the front side face of the lower support block, and the distance between the inner cutting edge gap and the front side face of the material pressing block is 0-40 mm. The inner side of the knife face forms a fixed support for the head of the diaphragm, and the fixed support is matched with the outer side support of the material supporting block to form inner and outer supports of the cutting edge, so that cutting is facilitated.

Preferably, a knife stone is further arranged, and the knife stone is fixed on the head of the shredder body and is elastically pressed on the circular rotary knife face. The sharpening stone ensures the sharpness of the cutting edge of the rotary knife, reduces the loss of the blade and ensures the shredding effect.

A shredding method for once cutting flat hollow fiber curtain type membranes comprises the following steps:

1) clamping the membrane: putting a hollow fiber curtain type membrane diaphragm which is prepared in advance into a limiting groove of a lower supporting block, and pressing the diaphragm by a pressing block with a soft elastic layer arranged at the bottom to ensure that an inner hole of the membrane is round and expose the head of the diaphragm to be cut;

2) cutting the film into flat pieces: the shredder body moves forwards along the guide mechanism, the exposed head of the diaphragm is lifted to the circular rotary knife edge when the supporting block moves to the diaphragm, and the circular rotary knife edge cuts the diaphragm flat at one time according to the advancing direction sequence due to the internal and external fixed supporting functions of the lower supporting block and the supporting block.

The device and the method for cutting the hollow fiber curtain type membrane flat at one time do not need to be bundled in advance, can efficiently and quickly cut the membrane sheets with any width continuously while keeping the roundness of the inner hole of the membrane wire and ensuring the performance of the membrane wire, and have simple and controllable process.

Drawings

Fig. 1 is a schematic structural view of a filament cutter for once cutting flat a hollow fiber curtain film according to example 1 of the present invention.

Fig. 2 is a left side view of fig. 1.

FIG. 1, a diaphragm; 2. a lower support block; 3. a limiting groove; 4. pressing blocks; 5. a shredder body; 6. a soft elastic layer; 7. a circular rotary knife; 8. a material supporting block; 9. connecting blocks; 10. a guide mechanism; 11. and (7) grinding a knife stone.

Detailed Description

The present invention will be further described with reference to fig. 1-2 and the following detailed description.

The utility model provides a shred device of once cutting off flat hollow fiber curtain formula membrane, as shown in the attached figure 1, 2, including the filament cutter body 5, circular rotatory sword 7 is located the head of filament cutter body 5, still include pressure material piece 4, lower supporting block 2 and piece 8 of holding up, lower supporting block 2 is used for supporting the diaphragm 1 of placing on it, pressure material piece 4 is used for pressing the fastening of diaphragm 1 and exposes diaphragm 1 head on lower supporting block 2 and waits to cut, circular rotatory sword 7 knife face is perpendicular with diaphragm 1 axial direction, hold up piece 8 fixed connection in filament cutter body 5 lower part, one end exceedes outside circular rotatory sword 7, hold up piece 8 and lift the diaphragm 1 head of corresponding position to circular rotatory sword 7 blade department and cut when being used for shredding.

The device further comprises a guide mechanism 10 and a connecting block 9, the guide of the guide mechanism 10 is perpendicular to the axial direction of the membrane 1, and the connecting block 9 is fixedly connected to the filament cutter body 5 and is in sliding connection with the guide mechanism 10.

The lower supporting block 2 is provided with a limiting groove 3, and the diaphragm 1 is arranged in the limiting groove 3.

The bottom of the material pressing block 4 is provided with a soft elastic layer 6.

The material supporting block 8 is obliquely arranged on the outer side of the knife surface of the circular rotary knife 7, an outer edge gap is formed between the material supporting block and the outer side of the knife surface of the circular rotary knife 7, and the included angle between the front side surface of the material supporting block and the advancing direction of the shredder body 5 is 150 degrees.

The knife face of the circular rotary knife 7 is parallel to the front side face of the lower supporting block 2 and the front side face of the material pressing block 4, an inner cutting edge gap of 1.5 mm is formed between the knife face of the circular rotary knife 7 and the front side face of the lower supporting block 2, and the distance between the inner cutting edge gap and the front side face of the material pressing block 4 is 20 mm.

The knife sharpening stone 11 is also arranged, and the knife sharpening stone 11 is fixed at the head part of the shredder body 5 and is elastically pressed on the knife surface of the circular rotary knife 7. The knife sharpening stone 11 does not rotate along with the blade, and the knife sharpening is automatically carried out during the work, so that the thickness of the cutting edge is ensured to be less than 0.4 mm.

A shredding method for once cutting flat hollow fiber curtain type membranes comprises the following steps:

1) clamping the membrane: putting a hollow fiber curtain type membrane diaphragm 1 which is prepared in advance into a limiting groove 3 of a lower supporting block 2, and tightly pressing the diaphragm 1 by a pressing block 4 with a soft elastic layer 6 arranged at the bottom while ensuring that the inner hole of the membrane is round and round, so that the head of the diaphragm 1 is exposed to be cut;

2) cutting the film into flat pieces: the shredder body 5 moves forwards along the guide mechanism 10, the exposed head of the diaphragm 1 is lifted to the cutting edge of the circular rotary knife 7 when the block holding block 8 moves to the diaphragm 1, and the cutting edge of the circular rotary knife 7 cuts the diaphragm 1 flat at one time due to the internal and external fixed supporting functions of the lower supporting block 2 and the block holding block 8.

The membrane 1 in the step 2) keeps round and smooth after being cut flat once, the ovality of the inner hole of the membrane is less than 40 percent, and the maximum length difference between membrane filaments is less than 3 mm. Wherein ovality = (maximum outer diameter-minimum outer diameter)/nominal outer diameter = 100%

In summary, the present invention is only a preferred embodiment, and is not intended to limit the scope of the invention, and all equivalent changes and modifications made in the content of the claims should be considered as the technical scope of the invention.