CN117306108A - Spunbond production equipment for avoiding web turning - Google Patents

Abstract

The invention discloses spun-bonding production equipment for preventing fiber nets from turning over, which comprises a net forming frame, wherein a roller group is arranged on the net forming frame, a net curtain is arranged on the roller group, a bearing surface for transporting the fiber nets is formed on the net curtain, an adsorption component is arranged on the net forming frame, a wire binding frame connected with the net forming frame is arranged above the net curtain, a conveying component is arranged on the wire binding frame, a plurality of air deflectors are arranged on the conveying component, the conveying component is used for circularly driving the air deflectors to move from one end, close to a wire separator, above the net curtain to one end, close to a hot rolling mill, above the net curtain, when the air deflectors are positioned above the net curtain, the air deflectors are in an inclined state, the lower ends of the air deflectors are closer to the hot rolling mill than the upper ends of the air deflectors, and the speed of the conveying component for controlling the air deflectors to move is the same as the speed of the roller group for driving the net curtain to circularly rotate. The air deflectors are controlled by the conveying assembly to advance along with the speed of the net curtain, so that the fiber net is relatively static with each air deflector when passing through the wire binding frame, vibration is avoided when the fiber net passes through the transition area, and accordingly the fiber net is prevented from turning over.

Description

Spunbond production equipment for avoiding web turning

Technical Field

The invention relates to the technical field of spinning, in particular to a spun-bonding production device for avoiding web turning.

Background

The spun-bonded non-woven fabric is formed by extruding and stretching a polymer to form continuous filaments, laying the filaments into a net, and then making the net into the non-woven fabric by self-bonding, thermal bonding, chemical bonding or mechanical reinforcement method.

Wherein, the lapping is one of the important technological processes of spunbond production, and the lapping mode process is: the melted material is ejected onto a net curtain through a screw extruder, a drafting device, a wire separator and other parts, is crossly laid to form a fiber net, and is conveyed to a hot rolling mill through a net forming machine for consolidation. The fiber net adsorbed on the lapping machine through air suction can form a turnover net because the surface fiber net is easily influenced by environmental factors such as return air, and the fiber net thickness is uneven after the turnover net appears, namely, the uniformity is poor, the physical index is unstable and the fluctuation is large; affecting the improvement of the yield and the quality assurance.

The prior art patent with publication number of CN217077974U discloses a suction air guiding device, it adsorbs the net curtain on the net curtain through wind guiding component and suction wind channel jointly, can avoid the net to a certain extent to turn over the net, but its wind guiding component carries out the water conservancy diversion wind direction for a plurality of guide plates, and the guide plate itself exists certain thickness, and there is a transition zone when the region below the guide plate is passed through to the net for the net can produce vibrations, thereby influences the shaping of net, reduces the quality of net.

Thus, how to improve the quality of the web and avoid web turn-ups is a technical problem addressed by the present application.

Disclosure of Invention

In view of the shortcomings of the prior art, a spunbond apparatus is provided that avoids web turning that can adsorb a web to a web curtain and reduce web vibration, thereby improving web quality and avoiding web turning.

In order to achieve the above purpose, the following technical scheme is provided:

the spun-bonding production equipment for avoiding web turning comprises a net forming frame, wherein a roller group is arranged on the net forming frame, a net curtain is arranged on the roller group, a bearing surface for transporting a web is formed on the net curtain, the roller group is used for driving the net curtain to circularly rotate, one end of the bearing surface of the net curtain is arranged below a wire separator, the other end of the bearing surface of the net curtain is close to a hot rolling mill, and the net curtain is used for transporting the web forwards from one end of the wire separator to one end of the hot rolling mill;

the net forming frame is provided with an adsorption component which is arranged below the net curtain bearing surface and is used for generating negative pressure to adsorb the fiber net on the net curtain;

the net curtain top is provided with and becomes net rack-connected and ties up the silk frame, tie up the silk frame and be located the top of adsorption component, be provided with conveying assembly on the silk frame, be provided with a plurality of aviation baffles on the conveying assembly, conveying assembly is used for the circulation to drive the aviation baffle and is close to the one end that the hot rolling mill is close to net curtain top from net curtain top one end that divides the silk ware, the aviation baffle is the lower extreme and is close to the inclination state of hot rolling mill than the upper end when being located net curtain top, conveying assembly control aviation baffle removal's speed is the same with the speed that the roller bearing group drove net curtain circulation rotation.

In summary, the above technical scheme has the following beneficial effects: the polymer of the antiseized non-woven fabrics is ejected onto a net curtain through a screw extruder, a drafting device, a wire separator and other parts, and is crossly laid to form a fiber net, and the net forming frame and the net curtain are used for conveying the fiber net to a hot rolling mill so as to enter the next step. The fiber net on the bearing surface of the net curtain can be adsorbed on the net curtain by arranging a plurality of adsorption components below the net curtain, so that the phenomenon of net turning is avoided.

Along with the mesh curtain gets closer to the hot rolling mill, get farther and farther from the adsorption component, the direction of air current through the mesh curtain gets larger and bigger with the contained angle of the direction of motion of fine net, the effort that leads to the fine net to receive with the opposite direction of motion of fine net is bigger and bigger, easily induce the fine net to turn over to the direction that deviates from the mesh curtain progressive, seriously influence the cloth cover quality, in order to solve this problem, the position that corresponds to the second inlet scoop on the mesh curtain has set up a silk-binding frame, be provided with a plurality of straddling whole wide aviation baffle of net cloth cover on the silk-binding frame, produce a speed the same as fine net and net curtain progressive direction from being close to a silk distributor one end when getting into the fine net, thereby give fine net a horizontal effort the same as net curtain progressive direction, this effort can partly offset or eliminate the direction effort that the air current below the fine net was exerted to the fine net, thereby reduce the risk and the probability that the fine net turns over the fine net, but the air current above this individual air current that does not move forms a certain region, make the fine net have a transition region when passing through this fine net air current region, it is difficult to pass through the transition region to produce a certain transition region when the fine net, and the net is passed through the transition region is avoided when passing through the net vibration control region, thereby the fiber curtain is passed through the steady, and the vibration quality is avoided when passing through the fine net is passed through the net, and the net is passed through the net is relatively to the transition region is avoided.

Drawings

FIG. 1 is a schematic illustration of an adsorbent assembly of a spunbond production apparatus that avoids web turn-ups;

FIG. 2 is a schematic view of a forming frame of a spunbond apparatus for avoiding web turn-ups;

FIG. 3 is a schematic illustration of a transfer assembly of a spunbond production apparatus that avoids web turn-ups;

FIG. 4 is a schematic illustration of a graduated rod of a spunbond production apparatus that avoids web turn-ups;

FIG. 5 is a schematic view of an air deflection panel of a spunbond production apparatus for avoiding web turn-ups;

FIG. 6 is a schematic view of a stretch chamber of a spunbond apparatus for avoiding web turn-ups.

Reference numerals: 1. a wire separator; 2. a hot rolling mill; 10. forming a net rack; 20. a roller group; 21. a return roller; 22. an adjusting roller; 23. a fixed roller; 30. a net curtain; 40. an adsorption assembly; 41. a first air duct; 42. a second air duct; 43. a suction fan; 44. a first air suction port; 441. a first main air chamber; 442. a first auxiliary air chamber; 45. a second air suction port; 451. a second main air chamber; 452. a second auxiliary air cavity; 50. a wire-binding frame; 51. a telescopic rod; 52. a connecting rod; 53. a positioning strip; 54. an adjusting rod; 55. a gradual change rod; 60. a transfer assembly; 61. a transmission member; 62. a driving wheel; 63. a mounting member; 70. an air deflector; 71. a connecting plate; 711. an upper plate; 712. a lower plate; 713. a telescopic chamber; 714. an elastic member; 715. a collision block; 716. an arc groove; 72. a contact plate; 721. the bar is rotated.

Detailed Description

The invention will now be described in further detail with reference to the drawings and examples. Wherein like parts are designated by like reference numerals. It should be noted that the words "front", "back", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.

As shown in fig. 1, a spun-bonding production device for avoiding web turning comprises a net forming frame 10, wherein a roller group 20 is arranged on the net forming frame 10, a net curtain 30 is arranged on the roller group 20, the net curtain 30 is provided with a bearing surface for transporting a web, the roller group 20 is used for driving the net curtain 30 to circularly rotate, one end of the bearing surface of the net curtain 30 is arranged below a wire separator 1, the other end of the bearing surface is arranged near a hot rolling mill 2, and the net curtain 30 is used for transporting the web forwards from one end of the wire separator 1 to one end of the hot rolling mill 2; the net forming frame 10 is provided with an adsorption assembly 40, the adsorption assembly 40 is arranged below the bearing surface of the net curtain 30, and the adsorption assembly 40 is used for generating negative pressure to adsorb the fiber net on the net curtain 30; the net curtain 30 is provided with a wire binding frame 50 connected with the net forming frame 10, the wire binding frame 50 is positioned above the adsorption component 40, the wire binding frame 50 is provided with a conveying component 60, the conveying component 60 is provided with a plurality of air deflectors 70, the conveying component 60 is used for circularly driving the air deflectors 70 to move from one end, close to the wire separator 1, above the net curtain 30 to one end, close to the hot rolling mill 2, above the net curtain 30, the air deflectors 70 are in an inclined state, when the air deflectors 70 are positioned above the net curtain 30, the lower ends of the air deflectors 70 are closer to the hot rolling mill 2 than the upper ends of the air deflectors are, and the moving speed of the air deflectors 70 is controlled by the conveying component 60 and the rotating speed of the net curtain 30 driven by the roller group 20 are the same. The polymer of the non-stick fabric is ejected onto the net curtain 30 through the screw extruder, the drafting device, the wire separator 1 and other parts, and is crossly laid to form a fiber net, the net forming frame 10 and the net curtain 30 are used for conveying the fiber net to the hot rolling mill 2 to enter the next step, and the fiber net is turned over due to the fact that the drafting device is operated to generate air flow and partial environmental factors, so that the follow-up procedure is influenced. The fiber net on the bearing surface of the net curtain 30 can be adsorbed on the net curtain 30 by arranging the plurality of adsorption assemblies 40 below the net curtain 30, so that the phenomenon of net turning is avoided. As the web 30 gets closer to the hot rolling mill 2, the air current passes through the web 30 and has an increasing angle with the moving direction of the web, which results in an increasing force acting on the web opposite to the moving direction of the web, which easily induces the web to turn up in the direction facing away from the web 30, thereby greatly affecting the quality of the web, in order to solve this problem, a wire-binding frame 50 is disposed at the position corresponding to the second air intake 45 on the web 30, a plurality of air deflectors 70 across the width of the whole web-forming cloth are disposed on the wire-binding machine, the air deflectors 70 generate a velocity equal to the advancing direction of the web and the web 30 when entering the web from the end near the wire-separator 1, thereby giving the web a horizontal force equal to the advancing direction of the web 30, which can partially cancel or completely eliminate the directional force acting on the web by the air current under the web 30, thereby reducing the risk and probability of web turning, but the air current above the web 30 forms a region by the air current at rest, which causes the air current to form a region, when the web is passing through the transition region, the web 70 is not passing through the transition region, thereby avoiding the web 70 from turning over the transition region, and thereby avoiding the occurrence of a steady vibration of the web when the web is passing through the transition region, and the web 70 when the transition region is caused by the transition region.

As shown in fig. 2, the adsorption assembly 40 includes a first air duct 41 and a second air duct 42, the first air duct 41 and the second air duct 42 are respectively connected with a suction fan 43, one end of the first air duct 41 away from the suction fan 43 is provided with a first air suction port 44, the first air suction port 44 is arranged below the bearing surface of the net curtain 30, and the first air suction port 44 and the wire separator 1 are aligned; the end of the second air duct 42, which is far away from the suction fan 43, is provided with a second air suction opening 45, the second air suction opening 45 is arranged below the bearing surface of the net curtain 30, and the second air suction opening 45 is positioned at one side of the first air suction opening 44, which is close to the direction of the hot rolling mill 2. Because the net curtain 30 has a certain length, one air channel is difficult to cover all the carrying surfaces of the net curtain 30, at least two air channels and the air suction fans 43 are required to be arranged, and a plurality of air channels are arranged in sequence along the moving direction of the net curtain 30, the net curtain 30 is preferably provided with two air channels and two air suction fans 43, and of course, other numbers of air channels and air suction fans 43 are also arranged and are protected and divided in the present application, because a plurality of air channels necessarily comprise the first air channel 41 and the second air channel 42.

The first air suction port 44 comprises a first main air cavity 441 and a first auxiliary air cavity 442, and the first main air cavity 441 is communicated with the first air duct 41 and is positioned right below the wire separator 1; the first auxiliary air chamber 442 is disposed near the second air intake 45 and communicates with the first main air chamber 441, and the depth of the first auxiliary air chamber 442 near one end of the first main air chamber 441 is deeper than the depth near one end of the second air intake 45. The first main air chamber 441 is communicated with the first air duct 41, so that the suction force generated by the first main air chamber 441 is directed downward, and the fiber net can be firmly attached to the net curtain 30. The first auxiliary air chamber 442 is used for connecting the first main air chamber 441 and the second main air chamber excessively, and plays a role of adsorption at a gap between the first main air chamber 441 and the second main air chamber, and meanwhile, the depth of the first auxiliary air chamber 442 becomes gradually shallower as the distance from the first main air chamber becomes larger, so that the more close to the drafting device, the more severe the airflow disturbance on the net curtain 30 is required, the more the net negative pressure required for stably attaching the fiber net on the net curtain 30 is required, whereas the more far from the drafting device, the less the airflow disturbance on the net curtain 30 is required, the less the net negative pressure required for stably attaching the fiber net on the net curtain 30 is required.

The second air suction port 45 comprises a second main air cavity 451 and a second auxiliary air cavity 452, and the second main air cavity 451 is communicated with the second air duct 42; the second auxiliary air cavity 452 is located at a side of the second main air cavity 451 away from the first air intake 44 and is communicated with the second main air cavity 451, and the depth of the second auxiliary air cavity 452 near the end of the second main air cavity 451 is deeper than the depth near the end of the hot rolling mill 2. The second main air chamber 451 is communicated with the second air duct 42, and the second main air chamber 451 is located directly above the second air duct 42, so that the suction force generated by the second main air chamber 451 is directed directly below, and the fiber web can be firmly attached to the net curtain 30. Because the present application preferably provides two air ducts and suction fans 43, the second secondary air chamber 452 continues until the end of the web 30 adjacent to the hot rolling mill 2, while the depth of the second secondary air chamber 452 is shallower as the distance from the first primary chamber increases, which may be stepwise or gradual, the stepwise being illustrated in the figures, this being because the more severe the airflow disturbance on the web 30 is, the more negative the web under the web is required to be stably adhered to the web 30, whereas the more slight the airflow disturbance on the web 30 is required to be stably adhered to the web 30 is, the less negative the web is required to be adhered to the web 30 is, the more negative the web is required to be.

As shown in fig. 3 and 4, for convenience of observation, two air deflectors 70 are reserved in fig. 4, the conveying assembly 60 comprises a driving part 61, a motor, a plurality of driving wheels 62 and a plurality of mounting parts 63, the driving wheels 62 are arranged on the net frame 10, the driving part 61 is arranged on the driving wheel 62, the plurality of mounting parts 63 are fixed on the driving part 61 at equal intervals, the air deflectors 70 are fixed with the mounting parts 63 one by one, the motor is connected with one driving wheel 62, and the motor controls the air deflectors 70 to circularly drive through the driving wheel 62 and the driving part 61. The transmission member 61 may be in the form of a chain or a belt, and the mounting member 63 and the air guide plate 70 are fixed by bolts so that the relative positions of the air guide plate 70, the mounting member 63 and the transmission member 61 do not change.

The wire-binding frame 50 comprises a telescopic rod 51, a connecting rod 52 and a positioning strip 53, wherein the connecting rod 52 extends from a second main wind cavity 451 to a second auxiliary wind cavity 452, one end of the telescopic rod 51 is connected with the wire-forming frame 10, the other end of the telescopic rod is connected with the connecting rod 52 and is used for driving the connecting rod 52 to move up and down, and the positioning strip 53 is arranged at the inner side of the lower end of the telescopic rod 51; the air deflector 70 comprises a connecting plate 71 and a collision plate 72, wherein the connecting plate 71 is fixedly connected with the mounting member 63, the collision plate 72 is connected with the connecting plate 71, the connecting plate 71 is in an inclined state that the lower end is closer to the hot rolling mill 2 than the upper end when the connecting plate 71 is positioned above the net curtain 30, and the lower end of the connecting plate 71 is in collision with the positioning strip 53 for maintaining the inclined state of the connecting plate 71. Specifically, the two connecting rods 52 are respectively arranged at two sides of the net rack 10, the front end and the rear end of each connecting rod 52 are respectively connected with one telescopic rod 51, the four telescopic rods 51 are in rectangular distribution, the two positioning strips 53 are arranged, the extending direction of the positioning strips 53 is identical to that of the connecting rods 52, the positioning strips 53 are fixed at the inner sides of the telescopic rods 51, the positioning strips 53 are used for limiting the abutting plates 72 from below, the four telescopic rods 51 can drive the connecting rods 52 and the air deflectors 70 to move up and down together, the distance between the air deflectors 70 and the net curtains 30 is adjusted, and the air deflectors 70 can only be adjusted to the position abutting against the positioning strips 53 at the lowest.

The wire hanger 50 further includes an adjusting rod 54, the adjusting rod 54 being telescopically disposed on the connecting rod 52, the adjusting rod 54 adjusting the tightness of the transmission 61 by supporting a supporting wheel. The adjusting rod 54 pushes the transmission member 61 upward through the supporting wheel, thereby playing a role in adjusting the tightness of the transmission member 61.

As shown in fig. 5 and 6, the connection plate 71 includes an upper plate 711 and a lower plate 712, a telescopic cavity 713 is formed at the lower end of the upper plate 711, the lower plate 712 is disposed in the telescopic cavity 713, an elastic member 714 is disposed in the telescopic cavity 713, the elastic member 714 is used for pushing the lower plate 712 inward in the telescopic cavity 713, two sides of the lower plate 712 are provided with abutting blocks 715, and the upper end of the upper plate 711 is fixedly connected with the mounting member 63; the lower end of the lower plate 712 is provided with an arc slot 716, the upper end of the abutting plate 72 is provided with a rotating strip 721, the rotating strip 721 is rotatably arranged in the arc slot 716, and the arc slot 716 is used for limiting the rotating angle of the abutting plate 72, so that the connecting plate 71 can only rotate in the inclined range that the lower end is closer to the hot rolling mill 2 than the upper end when the abutting plate 72 is positioned above the net curtain 30; the wire-binding frame 50 further comprises a gradual change rod 55, the gradual change rod 55 is arranged at two sides of the lower plate 712 and is connected with the telescopic rod 51, one end of the gradual change rod 55 close to the hot rolling mill 2 is lower than one end close to the wire divider 1, the inclination degree of the gradual change rod 55 is the same as that of the second auxiliary air cavity 452, and when the lower plate 712 moves to the upper part of the net curtain 30, the abutting block 715 is arranged below the gradual change rod 55 and abuts against the gradual change rod 55; when the lower plate 712 moves towards one end of the hot rolling mill 2, the abutting block 715 is abutted by the gradual change rod 55 so as to drive the lower plate 712 to move downwards; when the lower plate 712 moves downward, the interference plate 72 is interfered by the positioning bar 53 to rotate. Because the depth of the second secondary air chamber 452 becomes shallower as the distance from the first primary chamber increases, the direction of air flow through the web 30 increases with the direction of web movement, and in order for the air flow above and below the web 30 to be balanced, the air deflection plate 70 needs to be inclined closer to the web 30 in the direction of web 30 movement so that the angle between the air flow above and below the web 30 and the web 30 remains relatively uniform. The telescopic connection of the upper plate 711 and the lower plate 712, the rotary connection of the lower plate 712 and the interference plate 72, and the cooperation of the gradual change rod 55 and the interference block 715 enable the interference plate 72 to incline closer to the net curtain 30 along the moving direction of the net curtain 30. When the device is used, the height of the connecting rod 52 is adjusted through the telescopic rod 51, when the air deflector 70 circulates above the net curtain 30 and is closest to the wire distributor 1, the abutting plate 72 can abut against the positioning strip 53, the abutting block 715 is just abutted against the lower portion of the gradual change rod 55, then the air deflector 70 moves along the moving direction of the net curtain 30 and the net curtain 30 at the same speed, the lower plate 712 can downwards extend from the telescopic cavity 713 due to the abutting of the abutting block 715 and the gradual change rod 55, and the abutting plate 72 can only rotate between the lower plate 712 to change the inclination angle, so that the lower end of the abutting plate 72 is closer to the hot rolling mill 2 than the upper end, and the air flow above the net curtain 30 can downwards incline along with the approach to the hot rolling mill 2, so that the up-down air flow included angle of the positions of the net curtain 30 can be kept relatively consistent, the fiber web is not influenced by other external forces, and the fiber web is prevented from turning over.

The roller set 20 comprises a return roller 21, an adjusting roller 22 and a plurality of fixed rollers 23, wherein the return roller 21 and the fixed rollers 23 are arranged on the net forming frame 10, the return roller 21 is positioned on one side of the net forming frame 10 close to the hot rolling mill 2, the adjusting roller 22 is connected with the net forming frame 10 in a sliding manner, the return roller 21 and the fixed rollers 23 are arranged on the inner side of the net curtain 30, the adjusting roller 22 is arranged on the outer side of the net curtain 30, and the adjusting roller 22 is used for adjusting tightness of the net curtain 30 in a sliding manner. The net forming frame 10 is provided with a horizontal plane, the net curtain 30 can form a horizontal bearing surface by the adjusting roller 22 guiding the net curtain 30 to the horizontal plane of the net forming frame 10, the net curtain 30 can be more tightly contacted with the return roller 21 and the fixed rollers 23 by sliding the adjusting roller 22 towards the inner side surface direction of the net curtain 30, so that the net curtain 30 is tightened, and the fiber net enters the hot rolling mill 2 after moving to the return roller 21 along with the net curtain 30.

The diameter of the return roller 21 is smaller than the diameter of the fixed roller 23. Because the web moves from the roll of return roll 21 to the hot rolling mill 2, to prevent the web from sticking to the curtain 30, the diameter of the return roll 21 is reduced, increasing the curvature of the curtain 30 at the return roll 21, allowing the web to separate better from the curtain 30.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.

Claims (10)

1. The spunbonding production equipment for avoiding web turning is characterized by comprising a net forming frame (10), wherein a roller group (20) is arranged on the net forming frame (10), a net curtain (30) is arranged on the roller group (20), a bearing surface for transporting a web is formed on the net curtain (30), the roller group (20) is used for driving the net curtain (30) to circularly rotate, one end of the bearing surface of the net curtain (30) is arranged below a wire separator (1), the other end of the bearing surface is close to a hot rolling mill (2), and the net curtain (30) is used for transporting the web forwards from one end of the wire separator (1) to one end of the hot rolling mill (2);

an adsorption component (40) is arranged on the net forming frame (10), the adsorption component (40) is arranged below the bearing surface of the net curtain (30), and the adsorption component (40) is used for generating negative pressure to adsorb the fiber net on the net curtain (30);

the utility model discloses a wire-binding frame, including net curtain (30), net curtain (30) top, wire-binding frame (50) that net-forming frame (10) are connected, wire-binding frame (50) are located the top of adsorbing subassembly (40), be provided with conveying subassembly (60) on wire-binding frame (50), be provided with a plurality of aviation baffle (70) on conveying subassembly (60), conveying subassembly (60) are used for the circulation to drive aviation baffle (70) and move to the one end that net curtain (30) top is close to hot rolling mill (2) from the one end that net curtain (30) top is close to wire separator (1), aviation baffle (70) are when being located net curtain (30) top aviation baffle (70) are the lower extreme and are than the inclination that the upper end is close to hot rolling mill (2), conveying subassembly (60) control aviation baffle (70) remove the speed and roller train (20) drive net curtain (30) cyclic rotation's speed the same.

2. The spun-bonded production equipment for avoiding web turning according to claim 1, wherein the adsorption assembly (40) comprises a first air duct (41) and a second air duct (42), the first air duct (41) and the second air duct (42) are respectively connected with a suction fan (43), one end of the first air duct (41) away from the suction fan (43) is provided with a first air suction opening (44), the first air suction opening (44) is arranged below a bearing surface of the net curtain (30), and the first air suction opening (44) and the filament divider (1) are aligned;

one end of the second air duct (42) far away from the suction fan (43) is provided with a second air suction opening (45), the second air suction opening (45) is arranged below the bearing surface of the net curtain (30), and the second air suction opening (45) is positioned on one side, close to the direction of the hot rolling device, of the first air suction opening (44).

3. The spun-bonded production equipment for avoiding web turning according to claim 2, wherein the first air suction port (44) comprises a first main air cavity (441) and a first auxiliary air cavity (442), and the first main air cavity (441) is communicated with the first air channel (41) and is positioned right below the filament divider (1);

the first auxiliary air cavity (442) is arranged close to the second air suction opening (45) and is communicated with the first main air cavity (441), and the depth of the first auxiliary air cavity (442) close to one end of the first main air cavity (441) is deeper than the depth of the first auxiliary air cavity close to one end of the second air suction opening (45).

4. The spunbonding production equipment for avoiding web turn-up according to claim 2, wherein the second air suction port (45) comprises a second main air cavity (451) and a second auxiliary air cavity (452), and the second main air cavity (451) is communicated with the second air duct (42);

the second auxiliary air cavity (452) is located at one side, far away from the first air suction port (44), of the second main air cavity (451) and is communicated with the second main air cavity (451), and the depth of the second auxiliary air cavity (452) close to one end of the second main air cavity (451) is deeper than that of the second auxiliary air cavity close to one end of the hot rolling device.

5. The spun-bonded production equipment for avoiding web turning according to claim 4, wherein the conveying assembly (60) comprises a transmission part (61), a motor, a plurality of transmission wheels (62) and a plurality of installation parts (63), the transmission wheels (62) are all arranged on the net forming frame (10), the transmission part (61) is arranged on the transmission wheels (62), the installation parts (63) are fixed on the transmission part (61) at equal intervals, the air deflectors (70) are fixed with the installation parts (63) one by one, the motor is connected with one transmission wheel (62), and the motor controls the air deflectors (70) to circularly transmit through the transmission wheels (62) and the transmission parts (61).

6. The spun-bonded production equipment for avoiding web turning according to claim 5, wherein the wire-binding frame (50) comprises a telescopic rod (51), a connecting rod (52) and a positioning strip (53), the connecting rod (52) extends from a second main wind cavity (451) to a second auxiliary wind cavity (452), one end of the telescopic rod (51) is connected with the net-forming frame (10), the other end of the telescopic rod is connected with the connecting rod (52) and is used for driving the connecting rod (52) to move up and down, and the positioning strip (53) is arranged at the inner side of the lower end of the telescopic rod (51);

the wind deflector (70) comprises a connecting plate (71) and a collision plate (72), the connecting plate (71) is fixedly connected with the mounting piece (63), the collision plate (72) is connected with the connecting plate (71), when the connecting plate (71) is positioned above the net curtain (30), the connecting plate (71) is in an inclined state that the lower end is closer to the hot rolling mill (2) than the upper end, and the lower end of the connecting plate (71) is in collision with the positioning strip (53) for keeping the inclined state of the connecting plate (71).

7. The apparatus for producing spunbond web from which web turning is avoided according to claim 6, wherein the wire-binding frame (50) further comprises an adjusting lever (54), the adjusting lever (54) being telescopically arranged on the connecting rod (52), the adjusting lever (54) adjusting the tightness of the transmission member (61) by supporting a supporting wheel.

8. The spun-bonded production equipment for avoiding web turning according to claim 6, wherein the connecting plate (71) comprises an upper plate (711) and a lower plate (712), a telescopic cavity (713) is formed at the lower end of the upper plate (711), the lower plate (712) is arranged in the telescopic cavity (713), an elastic piece (714) is arranged in the telescopic cavity (713), the elastic piece (714) is used for pushing the lower plate (712) inwards towards the telescopic cavity (713), abutting blocks (715) are arranged at two sides of the lower plate (712), and the upper end of the upper plate (711) is fixedly connected with the mounting piece (63);

the lower end of the lower plate (712) is provided with an arc groove (716), the upper end of the abutting plate (72) is provided with a rotating strip (721), the rotating strip (721) is rotatably arranged in the arc groove (716), the arc groove (716) is used for limiting the rotating angle of the abutting plate (72), and the connecting plate (71) can only rotate in the inclined range that the lower end is closer to the hot rolling mill (2) than the upper end when the abutting plate (72) is positioned above the net curtain (30);

the wire binding frame (50) further comprises gradual change rods (55), the gradual change rods (55) are arranged on two sides of the lower plate (712) and are connected with the telescopic rods (51), one end of each gradual change rod (55) close to the hot rolling device is lower than one end close to the wire separating device (1), the inclination degree of each gradual change rod (55) is the same as that of the corresponding second auxiliary air cavity (452), and when the lower plate (712) moves to the position above the net curtain (30), the abutting blocks (715) are located below the gradual change rods (55) and abut against the gradual change rods (55);

when the lower plate (712) moves towards one end of the hot rolling device, the abutting block (715) is abutted by the gradual change rod (55) so as to drive the lower plate (712) to move downwards; when the lower plate (712) moves downward, the abutting plate (72) is abutted against the positioning bar (53) to rotate.

9. The spunbonding production equipment for avoiding web turning according to any one of claims 1 to 8, wherein the roller set (20) comprises a return roller (21), a regulating roller (22) and a plurality of fixed rollers (23), the return roller (21) and the fixed rollers (23) are arranged on the net forming frame (10), the return roller (21) is positioned on one side of the net forming frame (10) close to the hot rolling mill (2), the regulating roller (22) is slidingly connected with the net forming frame (10), the return roller (21) and the fixed rollers (23) are arranged on the inner side of the net curtain (30), the regulating roller (22) is arranged on the outer side of the net curtain (30), and the regulating roller (22) regulates the tightness of the net curtain (30) through sliding.

10. Spunbond production device to avoid web turning according to claim 9, characterized in that the diameter of the return roll (21) is smaller than the diameter of the fixed roll (23).