CN112936834B

CN112936834B - Bidirectional stretching equipment for producing PTFE (polytetrafluoroethylene) ultra-precise filtering membrane

Info

Publication number: CN112936834B
Application number: CN202110112088.6A
Authority: CN
Inventors: 胥平; 曹开斌
Original assignee: Shandong Senrong New Materials Co ltd
Current assignee: Shandong Senrong New Materials Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2022-07-12
Anticipated expiration: 2041-01-27
Also published as: CN112936834A

Abstract

The invention relates to biaxial stretching equipment for producing a PTFE (polytetrafluoroethylene) ultra-precise filtering membrane, which comprises an expander and a winding mechanism arranged at the discharge end of the expander, wherein the expander comprises a rack and an oven, a pair of conveying chains for clamping two sides of a film to convey the film through the oven are arranged on the rack, the return end of each conveying chain is positioned at the outer side of the oven, a plurality of sections of cooling boxes are arranged at the outer sides of the return ends of the conveying chains, each section of cooling box is connected with a suction pipe, the suction pipe is connected with a cooling fan, a secondary cooling box is arranged at the outer side of the process end of the conveying chain at the front end of the oven, blowing pipes for blowing air to the conveying chains are arranged at the front side and the rear side of the secondary cooling boxes, and the blowing pipes are connected with blowing fans. According to the invention, the return end of the conveying chain on the expander is arranged outside the oven and is matched with the cooling box arranged at the return end of the conveying chain, so that the temperature of the conveying chain can be reduced through air suction cooling, and the expanding quality of products is improved.

Description

Bidirectional stretching equipment for producing PTFE (polytetrafluoroethylene) ultra-precise filtering membrane

Technical Field

The invention belongs to the technical field of film production, and particularly relates to biaxial stretching equipment for producing a PTFE (polytetrafluoroethylene) ultra-precise filtering film.

Background

The PTFE hyperfiltration membrane is prepared by a biaxial stretching method and is mainly applied to chips, semiconductors, electrons and other environments requiring very clean. Belong to a high accuracy product, its filter fineness is under 0.1 um's granule detection condition, can reach more than 99.9995%, need the expander to stretch short PTFE filtration membrane in the oven in the super sharp filtration membrane production process of PTFE, thereby make the super sharp filtration membrane of PTFE, but present expander is business turn over from the oven to the chain of cliping filtration membrane both ends, this time that just causes the chain to be in the oven is longer, after the time is long, the temperature of chain can be higher than the required temperature of tensile film greatly, thereby cause the product production unqualified. And when the hyperfine filtration membrane rolling of PTFE, can need receive the limit to the limit portion of filtration membrane, because the film both ends have some shrink, expand at both ends through the manual work at present, not only extravagant manpower, intensity of labour is great in addition.

Disclosure of Invention

The invention aims to provide biaxial stretching equipment for producing a PTFE (polytetrafluoroethylene) hyperfiltration membrane, which solves the problems that the temperature of a chain of the existing expander is too high, so that the product is unqualified, and a rolling mechanism needs to be manually unfolded at two ends, so that the labor is wasted, and the labor intensity is high.

The invention relates to a biaxial stretching device for producing a PTFE ultra-precise filtering membrane, which comprises an expander and a rolling mechanism arranged at the discharge end of the expander, wherein the expander comprises a rack and an oven, the rack is provided with a pair of conveying chains for clamping two sides of a thin film to convey through the oven, the return end of each conveying chain is positioned at the outer side of the oven, the outer side of the return end of each conveying chain is provided with a multi-section cooling box, the multi-section cooling box wraps the return end of each conveying chain to enable the conveying chains to pass through the cooling boxes, each cooling box is connected with a suction pipe, the suction pipe is connected with a cooling fan, the outer side of the process end of the conveying chain at the front end of the oven is provided with a secondary cooling box, the front side and the rear side of the secondary cooling box are provided with blowing pipes for blowing air to the conveying chains, the blowing pipes are connected with blowing fans, the blowing fans draw air outside a plant area and blow out the air, and the blowing fans and the cooling fans are speed-adjustable fans, further cooling, the top of secondary cooling case also is equipped with the suction tube of connecting the cooling fan, winding mechanism includes the base, the base both ends are equipped with the bottom plate that can remove, be fixed with left branch seat and right branch seat on the bottom plate of both sides, be equipped with the rolling axle between left branch seat and the right branch seat, be connected with the actuating mechanism that can drive left branch seat and right branch seat along the axial reciprocating motion of rolling axle between left branch seat and the right branch seat, reciprocating motion about can carrying out when the rolling, during the feasible rolling, can receive the limit automatically, the manpower is practiced thrift, the rolling speed is improved.

The rolling machine is characterized in that guide rails are fixed at the tops of two ends of the base, sliding blocks are arranged on the guide rails, the sliding blocks are fixed with the base plate, the driving mechanism comprises two racks which are arranged in parallel, an incomplete gear is meshed between the two racks, a reciprocating motor is fixedly connected to the rear side of the incomplete gear, the reciprocating motor is an adjustable speed motor and is fixed on a mounting plate which is fixed on the base, connecting arc plates are fixed at two ends of the two racks, a left support and a right support are respectively fixed on the outer sides of the two connecting arc plates through connecting rods, the incomplete gear can be driven to rotate through the reciprocating motor, so that the upper rack and the lower rack are driven to move alternately, the purpose of driving a rolling shaft in a reciprocating mode is achieved, the edge rolling effect is better when rolling is achieved, a pair of a support plate I and a support plate II is arranged between the support plate I and the base plate, and a static removing roller is rotatably arranged on the support plate II, the film guide roller is installed in the last rotation of mounting panel, and film guide roller one end is fixed with the initiative motor, and the practical initiative motor drive of film guide roller can not cause frictional force inadequately to drive the film guide roller because the film is too thin and rotate, causes the film to expand and leads the membrane effect not good, influences the rolling and receives the limit effect.

The bearing roller is installed in a rotating mode between a left support and a right support on one side of a winding shaft, an adjusting screw rod is connected to the left support in a threaded mode, a rocker is fixed to the outer end of the adjusting screw rod, a connector is installed in the inner end of the adjusting screw rod in a rotating mode, the outer end of the connector is provided with a first polygonal connecting portion, one end of the winding shaft is provided with a first connecting groove matched with the first connecting portion, a rotating shaft is installed on the right support in a rotating mode, a first belt wheel is fixed to the rotating shaft, the first belt wheel is connected with a second belt wheel through a belt, the second belt wheel is connected with a winding motor, the inner end of the rotating shaft is provided with a second polygonal connecting portion, and the other end of the winding shaft is provided with a second connecting groove matched with the second connecting portion. The position of the connector can be adjusted by rocking the rocker, so that the winding shaft can be conveniently taken down and put down, and the winding roller can be conveniently replaced.

The left support of bearing roller and right branch seat inboard all are equipped with vertical limiting plate, and the both sides of limiting plate are equipped with outside bending, bend can be more convenient spacing block super fine filtration membrane, prevent that the limiting plate from scraping broken super fine filtration membrane, and the outside of limiting plate all is fixed with the telescopic link, and the telescopic link of both sides is fixed respectively at the top of left support and right branch seat, is equipped with adjusting bolt on the telescopic link. Can adjust the telescopic link through the adjusting bolt of unscrewing and stretch out length, adapt to the hyperfine filtration membrane of different width, the telescopic link is square telescopic link in addition, prevents that the limiting plate from rotating when adjusting, influences spacing effect.

The frame comprises an upper group of cross beams and a lower group of cross beams, a plurality of longitudinal beams are fixed between the upper group of cross beams and the lower group of cross beams, two horizontal support frame plates are arranged at the upper part of the left end of the frame, a conveying chain wheel for driving a conveying chain is rotatably arranged at the left end of each support frame plate, the conveying chain wheel is connected with a conveying motor, the conveying motor is an adjustable speed motor, a rolling support roller capable of rolling at the top of each longitudinal beam and a guide sleeve capable of sliding and guiding on each longitudinal beam are fixed at the bottoms of two ends of each support frame plate, the guide sleeve and the support frame plates are fixed through a connecting rod I, an adjusting rack I is fixed on each longitudinal beam, the adjusting rack I is meshed with an adjusting gear I, the adjusting gear I is fixedly connected with an adjusting motor I, the adjusting motor I is fixedly connected with the support frame plates through a support, the adjusting motor I can drive the adjusting gear I to rotate, so as to drive the support transverse plates to move back and forth along the longitudinal direction and forth, and adjust the width of the left ends of the two chains, thereby adapt to the membrane book of different width, the left side of oven is equipped with two and is the expansion supporting beam of outer splayed form, and the both ends bottom of expansion supporting beam is equipped with adjusting nut one, and adjusting nut one is connected with adjusting screw one, and the other end of adjusting screw one passes the oven and is connected with adjusting motor two. The width of the left end and the middle of the conveying chain can be conveniently adjusted to adapt to filtering membranes with different widths, and the superfine filtering membranes with various sizes can be stretched.

The right-hand member of oven is equipped with the support crossbearer of two parallels, the cover has the support sliding sleeve that can fore-and-aft slip on the longeron of right-hand member, support sliding sleeve top is rotated and is installed the conveying sprocket of drive conveyor chain other end, conveying sprocket fixedly connected with conveyor motor, it is fixed with the support sliding sleeve to support the crossbearer right-hand member, the right side of support sliding sleeve is fixed with adjusting motor three, adjusting motor fixedly connected with adjusting gear two, adjusting gear two meshes has vertical adjusting rack two that sets up, adjusting rack two right-hand member is fixed with the installation longeron, the installation longeron is fixed on the crossbeam, it is fixed with adjusting nut two to support crossbearer left end bottom, adjusting nut two is connected with adjusting screw two, adjusting screw two's the other end passes the oven and is connected with adjusting motor four. The width of the unfolding support beam and the width of the support cross frame can be respectively adjusted through adjusting the motors from two to four, so that the film stretcher is suitable for films with different widths and films with different stretched widths. One side of the oven is provided with a maintenance door. And position sensors are arranged below the second adjusting nut and the first adjusting nut and are connected with a controller, and the controller is connected with a display screen, a second adjusting motor and a third adjusting motor.

The outer end of the conveying chain is uniformly provided with a plurality of clamping devices for clamping the edge part of the film, each clamping device comprises a fixed clamping plate fixed at the lower part of the outer side of the conveying chain, a movable clamping plate is arranged at the outer side of the upper part of the fixed clamping plate, a guide rod is fixed at the top part of the movable clamping plate, a guide sleeve is sleeved at the outer side of the guide rod, a spring sleeved on the guide rod is arranged in the lower part of the guide sleeve, a second connecting rod is hinged at the top part of the guide rod, a third connecting rod is hinged at the top part of the second connecting rod, a rotating sleeve is fixedly connected at the top part of the third connecting rod, the rotating sleeve is rotatably arranged on a pin shaft which is fixed on a support plate, an opening driving rod is fixed at the upper part of the rotating sleeve, a driving disc for stirring the opening driving rod to lift the movable clamping plate is arranged at the top part of the conveying chain, clamping bulges are arranged at the inner side of the support plate, clamping grooves matched with the clamping bulges are arranged at the outer side of the upper part of the conveying chain, and the clamping bulges are fixed on the conveying chain through locking bolts, the inner side of the guide sleeve is fixed with a fourth connecting rod, the upper ends of the fourth connecting rod are fixed on the support plate, the inner sides of the support frame plate, the unfolding support beam and the support cross frame are respectively provided with a guide groove, a rolling bearing capable of rolling in the guide grooves is arranged in the guide grooves, and the rolling bearing is rotatably arranged at the bottom of the outer side of the conveying chain wheel. Can make to open the actuating lever through the driving-disc and rotate around the round pin axle when passing through to drive connecting rod two and connecting rod three actions, make the guide arm overcome the elasticity upward movement of spring, make move splint and open with fixed splint and press from both sides the mouth, make things convenient for film limit portion to get into, move the splint in addition and can clip the limit portion of film, need not clip too much, prevent to lead to the fact film limit portion too thick because of the too much of limit portion clamp. The lower end of the guide rod is connected with the movable clamping plate through threads. The top of the movable clamping plate is provided with a groove for supporting the spring. The support plate is arranged to be detachable, so that the spring working in a long-term high-temperature environment can be conveniently detached and replaced.

The inner sides of the outer ends of the cooling boxes at the left end and the right end are provided with guide chain wheels, the guide chain wheels are rotatably installed on the cross beam, the outer ends of the guide chain wheels are provided with tensioning chain wheels, the tensioning chain wheels are rotatably installed on the adjusting supporting rods, the outer sides of the adjusting supporting rods are sleeved with adjusting supporting sleeves, locking bolts are arranged on the adjusting supporting sleeves, the outer sides of the blowing pipes are fixedly connected with air delivery pipes, and the air delivery pipes are connected with blowing fans. The tightness of the conveying chain can be conveniently adjusted.

The top of the first adjusting nuts at the two ends is fixed with a rotating rod, the top of the rotating rod is rotatably installed at the bottom of the expanded supporting beam, the bottom of the first adjusting nuts at the two ends is fixed with a first guide sliding sleeve sleeved on the longitudinal beam, the top of the second adjusting nut is fixed with a fixed rod, the top of the fixed rod is fixed with the bottom of the left end of the supporting cross frame, and the bottom of the second adjusting nut is fixed with a second guide sliding sleeve sleeved on the longitudinal beam. When the first adjusting nut and the second adjusting nut are adjusted, the bottom can be slidably supported, the adjustment and the support are more stable, in addition, the two ends of the unfolded supporting beam are rotatably connected with the first adjusting nut, and the position of one end of the unfolded supporting beam can be conveniently and independently adjusted.

The utility model discloses a multi-section drying oven, including oven, baffle, conveyer chain, the lateral wall, be equipped with the import that supplies the conveying chain to pass through on every baffle and the oven about, all be equipped with the heater below every multi-section drying area import, the lower extreme of every heater all is equipped with evenly distributed plate, evenly be equipped with the gas pocket on the evenly distributed plate, evenly distributed plate's below is equipped with the gas distribution pipe along the fore-and-aft direction, evenly be equipped with the venthole on the gas distribution pipe outer wall, gas distribution pipe's bottom mounting has the conveyer pipe, be equipped with the wind speed adjusting valve on the conveyer pipe, the bottom of conveyer pipe is fixed with the guide duct, the one end fixedly connected with buffer tank of guide duct, pipe connection cooling fan is passed through to upper portion one side of buffer tank, cooling fan's air intake connection trunk line, the suction tube is connected to the trunk line, the outside of oven and the outside of cooling case all are equipped with the heat preservation. All be equipped with temperature sensor one in every section drying area, the outside of the transport chain between secondary cooling case and the oven is equipped with temperature sensor two, temperature sensor one, temperature sensor two, the heater, the fan of blowing is connected with the PLC controller, the control temperature, heating temperature can be adjusted to the heater, the temperature of multistage drying area risees to the intermediate position temperature for the high left side of intermediate temperature gradually in addition, the right side temperature is less than intermediate temperature for the film is stereotyped, the right-hand member portion that expandes a supporting beam is in the highest temperature drying area. All be equipped with the valve on every suction tube, can control the cooling box through the number of opening and open the number to control and carry the chain cooling too many, the cooling too is too many and influences subsequent expanding practicality easily. In addition, one side of the oven is connected with a cold air inlet pipe, and the cold air inlet pipe is connected with a cooling fan, so that cold air can be introduced to reduce the temperature in the oven when the temperature in the oven is too high. Can be in through the hot-blast blowback once more to the oven that the cooling fan retrieved in addition, accomplish heat recovery and utilize, reduce the wasting of resources, the wind speed can not be too fast behind buffer tank and uniform distribution board of the wind that blows out in addition, can utilize the wind heating that blows out to blow the film, make the film when tensile, can not fall down, cause the film to scrape and drag, prevent that the film from damaging, the wind speed of every section drying area all can carry out the independent control in addition, conveniently adjust the wind speed of every section, make the film all be in horizontal showy state when walking in every section drying area.

Compared with the prior art, the invention has the advantages that:

return stroke end through the transport chain on the expander sets up in the outside of oven, then the cooperation sets up the cooling case at transport chain return stroke end, can be through the cooling of induced drafting, reduce the temperature of transport chain, prevent to be in the oven for a long time because of transport chain inside, cause the high temperature, influence product expanding quality, be equipped with the unwinding mechanism that can make things convenient for quick change of lap and the winding mechanism of automatic receipts limit respectively in expander's exit both sides in addition, can quick replacement expand the membrane book, and can receive the limit to rolling featheredge portion automatically, the efficiency is improved.

Drawings

FIG. 1 is a schematic top view of the present invention;

FIG. 2 is an enlarged view of the structure at B in FIG. 1;

FIG. 3 is a schematic view of the winding mechanism from the right;

FIG. 4 is a schematic top view of the tenter;

FIG. 5 is an enlarged view of the structure at C in FIG. 3;

FIG. 6 is an enlarged schematic view of the structure at A in FIG. 3;

FIG. 7 is a schematic view of the structure of the clamping device;

FIG. 8 is a schematic view of the mounting structure of the guide sleeve;

FIG. 9 is a schematic view of the mounting structure of the first adjusting nut;

FIG. 10 is a schematic view of the mounting structure of the second adjusting nut;

FIG. 11 is a schematic structural view of an oven;

wherein: 1. a winding mechanism 101, a driving motor 102, a first bracket plate 103, a film guide roller 104, a base 105, a right support 106, a guide rail 107, a winding shaft 108, a carrier roller 109, a left support 110, a limiting plate 111, a telescopic rod 112, a second bracket plate 113, a static removing roller 114, an adjusting bolt 115, a connecting rod 116, a mounting plate 117, a rack 118, a connecting arc plate 119, a rotating shaft 120, a first pulley 121, a winding motor 122, a second pulley 123, an incomplete gear 124, a reciprocating motor 125, a bottom plate 126, a sliding block 127, an adjusting screw rod 128, a rocker arm 129, a connecting head 2, a spreader 201, a longitudinal beam 202, a first adjusting rack 203, a first adjusting gear 204, a bracket 205, an adjusting support rod 206, an adjusting support sleeve 207, a tensioning sprocket wheel 208, a blowing fan 209, a guiding sprocket wheel 210 and a cooling box, 211. a second adjusting motor 212, an oven 213, a first adjusting screw 214, a fourth adjusting motor 215, a second adjusting screw 216, a conveying chain 217, a driving disc 218, a conveying chain wheel 219, a longitudinal mounting beam 220, a second adjusting rack 221, a third adjusting motor 222, a support sliding sleeve 223, a second adjusting nut 224, a suction pipe 225, a first adjusting nut 226, a spread support beam 227, a guide groove 228, a wind conveying pipe 229, a support cross frame 230, a blowing pipe 231, a secondary cooling box 232, a support frame plate 233, a rotating rod 234, a first guide sliding sleeve 235, a fixed rod 236, a second guide sliding sleeve 237, a first connecting rod 238, a guide sleeve 239, a rolling support roller 240, a gas distribution pipe 241, an inlet 242, a heat preservation layer 243, a partition plate 244, a buffer tank 245, a heater 246, a cooling fan 247, a main pipe 248, a wind guide pipe, 249. the wind speed adjusting valve 250, the uniform distribution plate 251, the delivery pipe 252, the locking bolt 253, the rolling bearing 254, the fixed clamping plate 255, the movable clamping plate 256, the guide rod 257, the guide sleeve 258, the spring 259, the second connecting rod 260, the fourth connecting rod 261, the third connecting rod 262, the support plate 263, the opening driving rod 264, the rotating sleeve 265 and the clamping protrusion.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 11, the invention relates to a biaxial stretching device for producing a PTFE hyperfiltration membrane, which comprises an expander 2 and a winding mechanism 1 arranged at a discharge end of the expander, wherein the expander 2 comprises a frame and an oven 212, the frame is provided with a pair of conveying chains 216 for clamping two edges of a membrane and conveying the membrane through the oven 212, and the biaxial stretching device is characterized in that: the return end of the conveying chain 216 is located on the outer side of the oven 212, a plurality of sections of cooling boxes 210 are arranged on the outer side of the return end of the conveying chain 216, a suction pipe 224 is connected to each section of cooling box 210, the suction pipe 224 is connected with a cooling fan 246, a secondary cooling box 231 is arranged on the outer side of the forward end of the conveying chain 216 at the front end of the oven 212, blowing pipes 230 which blow air towards the conveying chain 216 are arranged on the front side and the rear side of each secondary cooling box 231, each blowing pipe 230 is connected with a blowing fan 208, a suction pipe 224 connected with the cooling fan 246 is also arranged on the top of each secondary cooling box 231, the winding mechanism 1 comprises a base 104, bottom plates 125 which can move are arranged at two ends of the base 104, a left support 109 and a right support 105 are fixed on the bottom plates 125 on two sides, a winding shaft 107 is arranged between the left support 109 and the right support 105, and a driving mechanism which can drive the left support 109 and the right support 105 to reciprocate along the axial direction of the winding shaft 107 is connected between the left support 109 and the right support 105.

Guide rails 106 are fixed to the tops of two ends of the base 104, a sliding block 126 is arranged on the guide rails 106, the sliding block 126 is fixed to a bottom plate 125, the driving mechanism comprises two racks 117 arranged in parallel, an incomplete gear 123 is meshed between the two racks 117, a reciprocating motor 124 is fixedly connected to the rear side of the incomplete gear 123, the reciprocating motor 124 is fixed to a mounting plate 116, the mounting plate 116 is fixed to the base 104, connecting arc plates 118 are fixed to two ends of the two racks 117, a left support 109 and a right support 105 are respectively fixed to the outer sides of the two connecting arc plates 118 through connecting rods 115, a pair of first support plate 102 and a second support plate 112 are arranged between the rack and the base 104, the second support plate 112 is located between the first support plate 102 and the bottom plate 125, a static removing roller 113 is rotatably installed on the second support plate 112, a film guide roller 103 is rotatably installed on the first support plate 102, and an active motor 101 is fixed to one end of the film guide roller 103.

A carrier roller 108 is rotatably arranged between a left support 109 and a right support 105 on one side of the winding shaft 107, an adjusting screw rod 127 is in threaded connection with the left support 109, a rocker 128 is fixed at the outer end of the adjusting screw rod 127, a connecting head 129 is rotatably arranged at the inner end of the adjusting screw rod 127, a polygonal first connecting portion is arranged at the outer end of the connecting head 129, a first connecting groove matched with the first connecting portion is formed in one end of the winding shaft 107, a rotating shaft 119 is rotatably arranged on the right support 105, a first belt wheel 120 is fixed on the rotating shaft 119, a second belt wheel 122 is connected to the first belt wheel 120 through a belt, a winding motor 121 is connected to the second belt wheel 122, a polygonal second connecting portion is arranged at the inner end of the rotating shaft 119, and a second connecting groove matched with the second connecting portion is formed in the other end of the winding shaft 107.

The left support 109 of bearing roller 108 and right support 105 inboard all are equipped with vertical limiting plate 110, and the both sides of limiting plate 110 are equipped with outside bending, and the outside of limiting plate 110 all is fixed with telescopic link 111, and the telescopic link 111 of both sides is fixed respectively at the top of left support 109 and right support 105, is equipped with adjusting bolt 114 on telescopic link 111.

The rack comprises an upper group of beams and a lower group of beams, a plurality of longitudinal beams 201 are fixed between the upper group of beams and the lower group of beams, two horizontal support frame plates 232 are arranged at the upper part of the left end of the rack, a conveying chain wheel 218 for driving a conveying chain 216 is rotatably arranged at the left end of each support frame plate 232, the conveying chain wheel 218 is connected with a conveying motor, rolling support rollers 239 capable of rolling at the top of the longitudinal beams 201 and guide sleeves 238 capable of sliding and guiding on the longitudinal beams 201 are fixed at the bottoms of the two ends of each support frame plate 232, the guide sleeves 238 and the support frame plates 232 are fixed through a first connecting rod 237, a first adjusting rack 202 is fixed on each longitudinal beam 201, a first adjusting gear 203 is meshed with the first adjusting gear 202, a first adjusting motor is fixedly connected with the first adjusting gear 203, the first adjusting motor is fixedly connected with the support frame plates 232 through a bracket 204, two splayed expansion support beams 226 are arranged on the left side of the oven 212, and first adjusting nuts 225 are arranged at the bottoms of the two ends of the expansion support beams 226, the first adjusting nut 225 is connected with a first adjusting screw rod 213, and the other end of the first adjusting screw rod 213 penetrates through the oven 212 to be connected with a second adjusting motor 211.

The right end of the oven 212 is provided with two parallel supporting cross frames 229, a supporting sliding sleeve 222 capable of sliding back and forth is sleeved on the longitudinal beam 201 at the rightmost end, a conveying chain wheel 218 for driving the other end of the conveying chain 216 is rotatably mounted at the top of the supporting sliding sleeve 222, a conveying motor is fixedly connected with the conveying chain wheel 218, the right end of the supporting cross frame 229 is fixed with the supporting sliding sleeve 222, a third adjusting motor 221 is fixed on the right side of the supporting sliding sleeve 222, the third adjusting motor 221 is fixedly connected with a second adjusting gear, the second adjusting gear is meshed with a second adjusting rack 220 which is longitudinally arranged, the right end of the second adjusting rack 220 is fixed with a longitudinal beam 219, the longitudinal beam 219 is fixed on the transverse beam, a second adjusting nut 223 is fixed at the bottom of the left end of the supporting cross frame 229, the second adjusting nut 223 is connected with a second adjusting screw 215, and the other end of the second adjusting screw 215 penetrates through the oven 212 to be connected with a fourth adjusting motor 214.

A plurality of clamping devices for clamping the edge of the film are uniformly arranged at the outer end of the conveying chain 216, each clamping device comprises a fixed clamping plate 254 fixed at the lower part of the outer side of the conveying chain 216, a movable clamping plate 255 is arranged at the outer side above the fixed clamping plate 254, a guide rod 256 is fixed at the top of the movable clamping plate 255, a guide sleeve 257 is sleeved at the outer side of the guide rod 256, a spring 258 sleeved on the guide rod 256 is arranged in the lower part of the guide sleeve 257, a second connecting rod 259 is hinged at the top of the guide rod 256, a third connecting rod 261 is hinged at the top of the second connecting rod 259, a rotating sleeve 264 is fixedly connected at the top of the third connecting rod 261, the rotating sleeve 264 is rotatably arranged on a pin shaft, the pin shaft is fixed on a support plate 262, an opening driving rod 263 is fixed at the upper part of the rotating sleeve 264, a driving disc 217 for shifting the opening driving rod 263 to lift the movable clamping plate 255 is arranged at the top of the conveying chain wheel 218 at the two ends of the conveying chain 216, a clamping protrusion 265 is arranged at the inner side of the support plate 262, a clamping groove matched with the clamping protrusion 265 is arranged at the outer side of the upper part of the conveying chain 216, the clamping protrusion 265 is fixed on the conveying chain 216 through a locking bolt 252, a four-bar linkage 260 is fixed on the inner side of the guide sleeve 257, the upper end of the four-bar linkage 260 is fixed on the support plate 262, guide grooves 227 are formed in the inner sides of the support frame plate 232, the unfolding support beam 226 and the support cross frame 229, a rolling bearing 253 capable of rolling in the guide grooves is arranged in the guide grooves 227, and the rolling bearing 253 is rotatably installed at the bottom of the outer side of the conveying chain wheel 218.

The inner sides of the outer ends of the left and right cooling boxes 210 are provided with guide chain wheels 209, the guide chain wheels 209 are rotatably installed on a cross beam, the outer ends of the guide chain wheels 209 are provided with tensioning chain wheels 207, the tensioning chain wheels are rotatably installed on adjusting support rods 205, adjusting support sleeves 206 are sleeved on the outer sides of the adjusting support rods 205, locking bolts 252 are arranged on the adjusting support sleeves 206, air conveying pipes 228 are fixedly connected to the outer sides of the air blowing pipes 230, and the air conveying pipes 228 are connected with a blowing fan 208.

The top of the adjusting nuts one 225 at both ends is fixed with a rotating rod 233, the top of the rotating rod 233 is rotatably installed at the bottom of the expanded support beam 226, the bottom of the adjusting nuts one 225 at both ends is fixed with a guide sliding sleeve one 234 sleeved on the longitudinal beam 201, the top of the adjusting nuts two 223 is fixed with a fixed rod 235, the top of the fixed rod 235 is fixed with the bottom of the left end of the support cross frame 229, and the bottom of the adjusting nuts two 223 is fixed with a guide sliding sleeve two 236 sleeved on the longitudinal beam 201.

A plurality of partition plates 243 are arranged in the oven 212, the oven 212 is divided into a plurality of sections of drying areas by the partition plates 243, inlets 241 for the conveying chains 216 to pass through are arranged on the left side wall and the right side wall of each partition plate 243 and the oven 212, a heater 245 is arranged below each section of drying area inlet 241, a uniform distribution plate 250 is arranged at the lower end of each heater 245, air holes are uniformly arranged on the uniform distribution plate 250, air distribution pipes 240 along the front and back direction are arranged below the uniform distribution plate 250, air outlet holes are uniformly arranged on the outer wall of each air distribution pipe 240, a conveying pipe 251 is fixed at the bottom end of each air distribution pipe 240, an air speed regulating valve 249 is arranged on each conveying pipe 251, an air guide pipe 248 is fixed at the bottom of each conveying pipe 251, a buffer tank 244 is fixedly connected to one end of each air guide pipe 248, one side of the upper part of each buffer tank 244 is connected with a cooling fan 246 through a pipeline, an air inlet of each cooling fan 246 is connected with a main pipeline 247, and each main pipeline 247 is connected with a suction pipe 224, the outer side of the oven 212 and the outer side of the cooling box 210 are both provided with insulating layers 242. The front end of the expander 2 is provided with a smooth guide roller with the top flush with the bottom of the fixed clamping plate, the guide roller can rotate, the outer wall of the guide roller is a mirror surface, the scratch or the abrasion of a thin filtering membrane is avoided, and the outer side of the guide roller is provided with a winding breaking roller for placing a PTFE short filtering membrane.

When the holding device on the conveying chain 216 moves to the driving disc 217, the opening driving rod 263 can be turned outwards around the pin shaft, so as to drive the connecting rod three 261 and the connecting rod two 259 at the lower part to move upwards, so as to drive the guide rod 256 to move upwards against the elastic force of the spring 258, so that enough space is reserved between the movable clamping plate 255 and the fixed clamping plate 254, a thin film to be expanded can be placed between the movable clamping plate 255 and the fixed clamping plate 254, after the opening driving rod 263 leaves the position of the driving disc 217, the movable clamping plate 255 can clamp the edge part of the thin film with the fixed clamping plate 254 again under the action of the spring 258, the conveying chains 216 at two sides can be adjusted through the adjusting motor one, the adjusting motor two 211, the adjusting motor three 221 and the adjusting motor four 214, so as to adapt to different filtering films and expand finished product ultra-precise filtering films with various widths, then the conveying chains 216 are started, and the conveying chains 216 drive the filtering films to move from left to right, when the filtering membrane moves into the oven 212, the filtering membrane is heated, and when the filtering membrane is heated, the filtering membrane can be gradually stretched, so that the filtering membrane is stretched to a required width in the oven 212, and the bottom of the oven 212 blows the filtering membrane through wind, so that the filtering membrane is in a floating state and cannot be scraped, after the filtering membrane exits from the oven 212, the filtering membrane is lapped on the membrane guide roller 103 and the static removing roller 113 under the conveying of the conveying chain 216 and then is wound on the winding shaft 107 of the winding mechanism 1, when the ultra-precise filtering membrane is wound, the winding shaft 107 is driven to reciprocate along the axial direction through the driving mechanism, so that the edge-winding effect of the membrane is better, the manpower is saved, the efficiency is higher, in addition, after the conveying of the conveying chain 216 enters a return stage, the temperature on the conveying chain 216 is extracted through the cooling box 210 and the suction pipe 224 and then is conveyed into the oven 212, namely, the cooling of the conveying chain 216 is carried out, and the heat energy can be recycled.

In conclusion, the return end of the conveying chain on the expander is arranged on the outer side of the oven and is matched with the cooling box arranged at the return end of the conveying chain, so that the temperature of the conveying chain can be reduced through air suction cooling, the phenomenon that the expansion quality of the ultra-precise filtering membrane is influenced due to overhigh temperature caused by the fact that the conveying chain is located in the oven for a long time is avoided, in addition, the winding mechanism capable of automatically winding edges is arranged on the outlet side of the expander, the edges of the thin edge winding part can be automatically wound, and the efficiency is improved.

In the description of the present invention, the terms "inner", "outer", "longitudinal", "lateral", "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are for convenience of description only and do not require that the present invention be necessarily constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Claims

1. The utility model provides a super smart filtration membrane production biaxial stretching equipment of PTFE, includes expander (2) and sets up winding mechanism (1) at its discharge end, and expander (2) include frame and oven (212), are equipped with a pair of transport chain (216) of carrying film both sides and passing oven (212) in the frame, its characterized in that: the return end of the conveying chain (216) is positioned at the outer side of the oven (212), a plurality of sections of cooling boxes (210) are arranged at the outer side of the return end of the conveying chain (216), each section of cooling box (210) is connected with a suction pipe (224), the suction pipes (224) are connected with cooling fans (246), a secondary cooling box (231) is arranged at the outer side of the process end of the conveying chain (216) at the front end of the oven (212), blowing pipes (230) facing the conveying chain (216) for blowing are arranged at the front side and the rear side of the secondary cooling box (231), the blowing pipes (230) are connected with blowing fans (208), the top of the secondary cooling box (231) is also provided with the suction pipes (224) connected with the cooling fans (246), the winding mechanism (1) comprises a base (104), movable bottom plates (125) are arranged at the two ends of the base (104), and a left support (109) and a right support (105) are fixed on the bottom plates (125) at the two sides, a winding shaft (107) is arranged between the left support (109) and the right support (105), and a driving mechanism capable of driving the left support (109) and the right support (105) to reciprocate along the axial direction of the winding shaft (107) is connected between the left support (109) and the right support (105); the frame comprises an upper group of transverse beams and a lower group of transverse beams, a plurality of longitudinal beams (201) are fixed between the upper group of transverse beams and the lower group of transverse beams, two horizontal support frame plates (232) are arranged at the upper part of the left end of the frame, a conveying chain wheel (218) for driving a conveying chain (216) is rotatably installed at the left end of each support frame plate (232), the conveying chain wheel (218) is connected with a conveying motor, rolling support rollers (239) capable of rolling at the tops of the longitudinal beams (201) and guide sleeves (238) capable of sliding and guiding on the longitudinal beams (201) are fixed at the bottoms of the two ends of each support frame plate (232), the guide sleeves (238) and the support frame plates (232) are fixed through first connecting rods (237), first adjusting racks (202) are fixed on the longitudinal beams (201), the first adjusting racks (202) are meshed with first adjusting gears (203), the first adjusting gears (203) are fixedly connected with first adjusting motors, the first adjusting motors are fixedly connected with the support frame plates (232) through supports (204), two splayed unfolding support beams (226) are arranged on the left side of the oven (212), adjusting nuts (225) are arranged at the bottoms of the two ends of the unfolding support beams (226), the adjusting nuts (225) are connected with adjusting screws (213), and the other ends of the adjusting screws (213) penetrate through the oven (212) and are connected with adjusting motors (211); the outer end of the conveying chain (216) is uniformly provided with a plurality of clamping devices for clamping the edge part of a film, each clamping device comprises a fixed clamping plate (254) fixed at the lower part of the outer side of the conveying chain (216), a movable clamping plate (255) is arranged at the outer side above the fixed clamping plate (254), a guide rod (256) is fixed at the top of the movable clamping plate (255), a guide sleeve (257) is sleeved at the outer side of the guide rod (256), a spring (258) sleeved on the guide rod (256) is arranged in the lower part of the guide sleeve (257), a second connecting rod (259) is hinged at the top of the guide rod (256), a third connecting rod (261) is hinged at the top of the second connecting rod (259), a rotating sleeve (264) is fixedly connected at the top of the third connecting rod (261), the rotating sleeve (264) is rotatably arranged on a pin shaft, the pin shaft is fixed on the supporting plate (262), an opening driving rod (263) is fixed at the upper part of the rotating sleeve (264), driving discs (217) for shifting the opening driving rod (263) to lift the movable clamping plate (255) are arranged at the top of conveying chain (218) at two ends of the conveying chain (216), the inboard of extension board (262) is equipped with joint arch (265), the upper portion outside of conveyor chain (216) is equipped with the joint recess with joint arch (265) complex, joint arch (265) is fixed on conveyor chain (216) through locking bolt (252), guide pin bushing (257) inboard is fixed with four (260) connecting rods, four (260) upper ends of connecting rods are fixed on extension board (262), support frame plate (232), the inboard of expansion supporting beam (226) and support crossbearer (229) all is equipped with guide slot (227), be equipped with rolling antifriction bearing (253) that can roll in it in guide slot (227), antifriction bearing (253) rotate to be installed in the outside bottom of conveying sprocket (218).

2. The PTFE hyperfiltration membrane production bidirectional stretching equipment of claim 1, characterized in that: guide rails (106) are fixed at the tops of two ends of the base (104), a sliding block (126) is arranged on the guide rails (106), the sliding block (126) is fixed with the base plate (125), the driving mechanism comprises two racks (117) which are arranged in parallel, an incomplete gear (123) is meshed between the two racks (117), a reciprocating motor (124) is fixedly connected to the rear side of the incomplete gear (123), the reciprocating motor (124) is fixed on a mounting plate (116), the mounting plate (116) is fixed on the base (104), connecting arc plates (118) are fixed at two ends of the two racks (117), a left support (109) and a right support (105) are respectively fixed on the outer sides of the two connecting arc plates (118) through connecting rods (115), a pair of support plate I (102) and support plate II (112) is arranged between the support plate I (102) and the base plate (125), a static removing roller (113) is rotatably installed on the support plate II (112), a film guide roller (103) is rotatably arranged on the first support plate (102), and one end of the film guide roller (103) is fixedly provided with a driving motor (101).

3. The PTFE hyperfiltration membrane production biaxial stretching equipment of claim 2, characterized in that: the winding device is characterized in that a supporting roller (108) is rotatably mounted between a left support (109) and a right support (105) on one side of a winding shaft (107), an adjusting screw rod (127) is connected to the left support (109) in a threaded manner, a rocker (128) is fixed to the outer end of the adjusting screw rod (127), a connector (129) is rotatably mounted to the inner end of the adjusting screw rod (127), a polygonal first connecting portion is arranged at the outer end of the connector (129), a first connecting groove matched with the first connecting portion is formed in one end of the winding shaft (107), a rotating shaft (119) is rotatably mounted on the right support (105), a first belt wheel (120) is fixed to the rotating shaft (119), a second belt wheel (122) is connected to the first belt wheel (120) through a belt, the second belt wheel (122) is connected with a winding motor (121), a second polygonal connecting portion is arranged at the inner end of the rotating shaft (119), and a second connecting groove matched with the second connecting portion is formed in the other end of the winding shaft (107).

4. The PTFE hyperfiltration membrane production biaxial stretching equipment of claim 3, characterized in that: bearing roller (108) left support (109) and right support (105) inboard all are equipped with vertical limiting plate (110), and the both sides of limiting plate (110) are equipped with outside bending, and the outside of limiting plate (110) all is fixed with telescopic link (111), and telescopic link (111) of both sides are fixed respectively at the top of left support (109) and right support (105), are equipped with adjusting bolt (114) on telescopic link (111).

5. The PTFE hyperfiltration membrane production bidirectional stretching equipment of claim 4, characterized in that: the right end of the oven (212) is provided with two parallel supporting cross frames (229), a longitudinal beam (201) at the rightmost end is sleeved with a supporting sliding sleeve (222) capable of sliding back and forth, the top of the supporting sliding sleeve (222) is rotatably provided with a conveying chain wheel (218) for driving the other end of a conveying chain (216), the conveying chain wheel (218) is fixedly connected with a conveying motor, the right end of the supporting cross frame (229) is fixed with the supporting sliding sleeve (222), the right side of the supporting sliding sleeve (222) is fixedly provided with a third adjusting motor (221), the third adjusting motor (221) is fixedly connected with a second adjusting gear, the second adjusting gear is meshed with a second adjusting rack (220) which is longitudinally arranged, the right end of the second adjusting rack (220) is fixedly provided with a mounting longitudinal beam (219), the mounting longitudinal beam (219) is fixed on a cross beam, the bottom of the left end of the supporting cross frame (229) is fixedly provided with a second adjusting nut (223), and the second adjusting nut (223) is connected with a second adjusting screw rod (215), the other end of the second adjusting screw rod (215) penetrates through the oven (212) and is connected with a fourth adjusting motor (214).

6. The PTFE hyperfiltration membrane production biaxial stretching equipment of claim 5, characterized in that: the cooling box comprises a cooling box body (210), guide chain wheels (209) are arranged on the inner sides of the outer ends of the cooling box body at the left end and the right end, the guide chain wheels (209) are rotatably installed on a cross beam, tensioning chain wheels (207) are arranged on the outer ends of the guide chain wheels (209), the tensioning chain wheels are rotatably installed on adjusting supporting rods (205), adjusting supporting sleeves (206) are sleeved on the outer sides of the adjusting supporting rods (205), locking bolts (252) are arranged on the adjusting supporting sleeves (206), air conveying pipes (228) are fixedly connected to the outer sides of air blowing pipes (230), and air blowing fans (208) are connected to the air conveying pipes (228).

7. The PTFE hyperfiltration membrane production biaxial stretching equipment of claim 6, characterized in that: rotating rods (233) are fixed to the tops of the first adjusting nuts (225) at the two ends, the top ends of the rotating rods (233) are rotatably mounted at the bottom of the expanded supporting beam (226), first guide sliding sleeves (234) sleeved on the longitudinal beam (201) are fixed to the bottoms of the first adjusting nuts (225) at the two ends, fixing rods (235) are fixed to the tops of the second adjusting nuts (223), the tops of the fixing rods (235) are fixed to the bottom of the left end of the supporting cross frame (229), and second guide sliding sleeves (236) sleeved on the longitudinal beam (201) are fixed to the bottoms of the second adjusting nuts (223).

8. The PTFE hyperfiltration membrane production biaxial stretching equipment of claim 7, characterized in that: a plurality of clapboards (243) are arranged in the oven (212), the clapboards (243) divide the oven (212) into a plurality of sections of drying areas, inlets (241) for the transmission chains (216) to pass through are respectively arranged on the left side wall and the right side wall of each clapboard (243) and the oven (212), heaters (245) are respectively arranged below the inlets (241) of each plurality of sections of drying areas, the lower end of each heater (245) is provided with a uniform distribution plate (250), air holes are uniformly arranged on the uniform distribution plates (250), an air distribution pipe (240) along the front-back direction is arranged below the uniform distribution plates (250), air outlet holes are uniformly arranged on the outer wall of the air distribution pipe (240), a conveying pipe (251) is fixed at the bottom end of the air distribution pipe (240), an air speed regulating valve (249) is arranged on the conveying pipe (251), an air guide pipe (248) is fixed at the bottom of the conveying pipe (251), one end of the air guide pipe (248) is fixedly connected with a buffer tank (244), one side of the upper part of the buffer tank (244) is connected with a cooling fan (246) through a pipeline, an air inlet of the cooling fan (246) is connected with a main pipeline (247), the main pipeline (247) is connected with a suction pipe (224), and the outer side of the drying oven (212) and the outer side of the cooling box (210) are both provided with a heat preservation layer (242).