Superfine fiber melt-blown filter element production device

Abstract

The invention relates to the technical field of melt-blown filter element production, and discloses a superfine fiber melt-blown filter element production device. The superfine fiber melt-blown filter element production device comprises a rack, the rack is provided with an installation frame with the position capable of being adjusted, the installation frame is provided with a conveying mechanism and a cutting machine, the conveying mechanism is provided with a center shaft, the rack is further provided with a fine fiber spray head and a coarse fiber spray head, and the fine fiber spray head and the coarse fiber spray head are arranged on the cutting machine. The fine fiber spray head is located above the central shaft, and the crude fiber spray head is located on one side below the central shaft, so that the thick fiber and the fine fiber are intersected and fused before being attached to the central shaft after being sprayed out. According to the superfine fiber melt-blown filter element production device provided by the invention, coarse and fine fibers sprayed by the coarse fiber spray head and the fine fiber spray head can be intersected and fused before being attached to the central shaft, so that the fibers can be combined more sufficiently and cannot be interfered by disturbing airflow, and the quality of the melt-blown filter element is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of melt-blown filter element production, and in particular to a device for producing ultra-fine fiber melt-blown filter elements. Background Art

[0002] Meltblown filter element is a tubular filter element made of non-toxic and odorless polypropylene particles through heating, melting, spinning, pulling, and forming. Meltblown filter elements are generally divided into two types: framed and frameless. Framed filter elements usually have a central axis (inner axis) inside, while frameless filter elements do not have a central axis. Moreover, the production methods of the two types of meltblown filter elements are also different. When producing skeleton filter elements, the central axis (inner axis) is generally conveyed by a conveying mechanism, so that the central axis rotates circumferentially while moving axially. In this process, the raw materials are first heated and melted by a screw extruder, then filtered by a melt filter, and finally the fiber filaments are sprayed out by a meltblown head and evenly attached to the central axis 11 (in this process, a high-temperature and high-speed airflow is provided by an air compressor and an air heater for stretching the fibers, and the meltblown head is generally divided into a coarse fiber nozzle and a fine fiber nozzle). In addition, after being sprayed out, the coarse fiber filaments (support fibers) are received by a transfer roller and transferred to the central axis 11 to combine with the fine fiber filaments (filter fibers), thereby forming a tubular filter element with the central axis as the core.

[0003] For example, the U.S. patent with publication number US5733581A discloses a device for manufacturing melt-blown filter media, which discloses: "The device 10 is provided with at least one additional melt-blown die 22a, which is arranged in a radially spaced relationship with the conical collecting / transfer roller 23". The conical collecting / transfer roller 23 is used to receive the support fibers sprayed out by the melt-blown die 22a and transfer them to the central axis 11 to be combined with the filter fibers sprayed out by the melt-blown die 16a. Since the support fibers will first be attached to the collecting / transfer roller 23, when the support fibers are assembled with the filter fibers, they are combined with the filter fibers in the form of a surface, and the relationship between the two is a layer-to-layer relationship, resulting in poor combination effect and insufficient mutual combination. Therefore, it is necessary to propose a production device for ultrafine fiber melt-blown filter elements. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a production device for ultrafine fiber melt-blown filter element, comprising: a frame, a mounting frame capable of position adjustment is provided on the frame, a conveying mechanism and a cutting machine are respectively provided on the mounting frame, a central axis is provided on the conveying mechanism, a fine fiber nozzle and a coarse fiber nozzle are also provided on the frame, the fine fiber nozzle is located above the central axis, and the coarse fiber nozzle is located on one side below the central axis, so that the coarse and fine fibers will intersect and merge before being attached to the central axis after being sprayed out, and the mounting frame is also provided with a negative pressure adsorption mechanism for preventing the coarse and fine fibers from being disturbed by the airflow and ensuring the smooth combination of the two; The negative pressure adsorption mechanism includes a rotatable three-way pipe, a block that can control the ventilation path is slidably installed in the three-way pipe, two first air ducts for extending to the inside of the central axis are arranged on the three-way pipe, and retractable second air ducts are arranged in the two first air ducts. Strip air outlets are arranged on the first air duct and the second air duct, and a suction fan connected to the three-way pipe is arranged at the bottom of the frame, so that the first air duct and the second air duct can form negative pressure from the inside of the central axis to adsorb the coarse and fine fibers that meet after being ejected and the airflow ejected therefrom.

[0005] Preferably, a slide mechanism is provided on the frame, and the slide mechanism includes a slide fixedly mounted on the top of the frame, a rotatable first screw and a first motor for driving the first screw are provided on the slide, a slide plate is slidably mounted on the slide, a threaded sleeve on the first screw is provided with an internal thread block fixedly connected to the slide plate, and four first electric push rods distributed in a rectangular shape are provided on the slide plate, and the output rods of the four first electric push rods are fixedly connected to the bottom of the mounting frame, so that the relative position between the central axis and the fine fiber nozzle and the coarse fiber nozzle can be adjusted.

[0006] Preferably, an iron push ring is provided on the sliding sleeve of the first air duct, a first magnet for driving the iron push ring to move is embedded on the second air duct, a second magnet for limiting the iron push ring is embedded on the first air duct, and the magnetism of the second magnet is greater than that of the first magnet, so that the second air duct can be telescoped to remove the cut melt-blown filter element.

[0007] Preferably, one end of the iron push ring is fixedly connected to a telescopic bellows sleeve, and the other end of the telescopic bellows sleeve is fixedly connected to the first air duct, so that when the central axis has not yet been put on the first air duct after cutting, the iron push ring can drive the telescopic bellows sleeve to seal the strip air outlet on the first air duct, thereby preventing the suction force of the second air duct portion from being diverted.

[0008] Preferably, a blocking cover is rotatably installed at one end of the second air duct, and the blocking cover is in sliding contact with the inner wall of the central axis, which can not only be used to stabilize the central axis, but also seal the gap between the second air duct and the central axis, thereby ensuring the adsorption force in the second air duct area.

[0009] Preferably, the conveying mechanism comprises an outer cylinder fixedly connected to the mounting frame, three slightly inclined conveying wheels are rotatably mounted in the outer cylinder, and three second motors for driving the conveying wheels are arranged in the outer cylinder, thereby driving the central axis to move axially and rotate circumferentially.

[0010] Preferably, a roller frame for supporting the central axis is provided on the mounting frame, so as to stabilize and support the central axis.

[0011] Preferably, an axis frame is provided on the mounting frame, the three-way pipe passes through the axis frame and is rotatably connected to the axis frame, and a third motor for driving the three-way pipe to rotate is fixedly mounted on the axis frame.

[0012] Preferably, an internal threaded tube is fixedly installed in the second air duct, a second screw is rotatably installed in the first air duct, one end of the second screw extends into the internal threaded tube and is threadedly connected to the internal threaded tube, and a fourth motor for driving the second screw is also provided in the first air duct, so that the second air duct can be extended and retracted as needed.

[0013] Preferably, a curved tube is rotatably mounted on the three-way tube, and one end of the curved tube is connected to the air suction port of the suction fan via a same corrugated tube.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention removes the transfer roller in the traditional melt-blowing equipment, and sets the fine fiber nozzle above the central axis, and increases the wind force of the fine fiber nozzle as needed, and then sets the coarse fiber nozzle below the central axis side, so that the nozzle of the coarse fiber nozzle is tilted upward, so that it forms a cross-convergence with the fine fiber nozzle during the fiber spraying operation, and directly interweaves and combines, so that the coarse and fine fibers are combined more fully and thoroughly. At the same time, in addition to the advantage of making the coarse and fine fibers more fully combined, this arrangement method has the advantage of making the coarse and fine fibers more fully combined. When the airflows sprayed by the fine fiber nozzle and the coarse fiber nozzle intersect, the fine fibers and the coarse fibers are already in an interweaving and combining state, so that the disturbed airflow generated when the two airflows intersect has a lower impact on the melt-blowing molding work, and the central axis can also be adjusted up and down and left and right through a slide mechanism, so as to adjust the relative position between the central axis and the fine fiber nozzle and the coarse fiber nozzle, so as to adapt to different needs during production and improve the applicability of the entire equipment; By arranging a negative pressure adsorption mechanism composed of a three-way pipe, a first air duct, a second air duct and a suction fan on the melt-blown equipment, the central axis can generate negative pressure from the inside, thereby generating suction, so that the coarse and fine fibers can be more smoothly attached to the central axis under the influence of suction after being sprayed out, and the generated suction can also eliminate the airflow sprayed by the fine fiber nozzle and the coarse fiber nozzle, avoiding the generation of disturbed airflow when the airflow impacts the central axis to affect the attachment of subsequent fibers, further ensuring that the fibers are not affected by the disturbed airflow, and ensuring uniform melt-blowing; In order to make the negative pressure adsorption mechanism perfectly adapt to the meltblown device and solve the problem that the central axis cannot be loaded or unloaded normally after the negative pressure adsorption mechanism is installed, the present application sets the negative pressure adsorption mechanism at the discharge end of the central axis, and adopts a solution of rotating and alternating two groups of first air ducts and second air ducts, so that when the cutting machine cuts the meltblown filter element and the central axis part, the second air duct can be retracted, and then the cut filter element is transferred, so that the two groups of first air ducts and second air ducts are replaced in turn, and with the iron push ring, the first magnet and the second magnet, the second air duct can remove the cut filter element by telescoping, thereby realizing the function of negative pressure suction and allowing the filter element to be discharged smoothly to complete the unloading work. Moreover, compared with directly withdrawing the first and second air ducts from the central axis for cutting and unloading, the rotation unloading method is relatively less restricted by space, and there is no need to reserve space for the displacement of the negative pressure adsorption mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of the ultra-fine fiber melt-blown filter element production device of the present invention; Figure 2 This is a rear view showing the ultra-fine fiber melt-blown filter element production device of the present invention; Figure 3 This is a partial disassembled cross-sectional view of the ultrafine fiber melt-blown filter element production device of the present invention; Figure 4 It is a display diagram of the upper part of the ultrafine fiber melt-blown filter element production device and the slide mechanism of the present invention; Figure 5 This is a display diagram of the slide mechanism; Figure 6 This is a diagram showing the upper half of the ultrafine fiber melt-blown filter element production device of the present invention; Figure 7 This is a disassembled display diagram of the upper half of the ultrafine fiber melt-blown filter element production device of the present invention; Figure 8 It is a three-dimensional cross-sectional display diagram of the negative pressure adsorption mechanism; Fig. 9 It is a plane cross-sectional view showing the negative pressure adsorption mechanism; Fig.10Schematic diagram of the injection position of fine fiber nozzle and coarse fiber nozzle.

[0016] Description of main symbols: 1. Frame; 2. Slide; 3. First motor; 4. First screw; 5. Internal thread block; 6. Slide plate; 7. First electric push rod; 8. Mounting frame; 9. Outer cylinder; 10. Transmission wheel; 11. Center axis; 12. Roller frame; 13. Fine fiber nozzle; 14. Coarse fiber nozzle; 15. Cutting machine; 16. Material guide trough; 17. Three-way pipe; 18. Curved pipe; 19. First air duct; 20. Second air duct; 21. Blocking cover; 22. Blocking block; 23. Suction fan; 24. Iron push ring; 25. First magnet; 26. Second magnet; 27. Telescopic bellows. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0018] Please combine Figures 1 to 10 The ultrafine fiber melt-blown filter element production device provided in this embodiment includes: a frame 1, a mounting frame 8 that can be adjusted in position is arranged on the frame 1, a slide mechanism is arranged on the frame 1, and the slide mechanism includes a slide 2 fixedly mounted on the top of the frame 1, a rotatable first screw 4 and a first motor 3 for driving the first screw 4 are arranged on the slide 2, a slide plate 6 is slidably mounted on the slide 2, an internal thread block 5 fixedly connected to the slide plate 6 is threadedly sleeved on the first screw 4, four first electric push rods 7 distributed in a rectangular shape are arranged on the slide plate 6, and the output rods of the four first electric push rods 7 are fixedly connected to the bottom of the mounting frame 8, so that the relative positions between the central axis 11 and the fine fiber nozzle 13 and the coarse fiber nozzle 14 can be adjusted, a conveying mechanism and a cutting machine 15 are respectively arranged on the mounting frame 8, and a second electric push rod is arranged on the mounting frame 8, and the output rod of the second electric push rod is fixedly connected to the cutting machine 15, In this way, the cutting machine 15 can be driven to approach the processed melt-blown filter element and cut it. A central axis 11 is arranged on the conveying mechanism, and the conveying mechanism includes an outer cylinder 9 fixedly connected to the mounting frame 8. Three slightly inclined conveying wheels 10 are rotatably installed in the outer cylinder 9. Three second motors for driving the conveying wheels 10 are arranged in the outer cylinder 9. The three conveying wheels 10 all rotate clockwise, so as to drive the central axis 11 to move axially and rotate circumferentially. A nozzle fixing frame is fixedly installed on the frame 1, and a fine fiber nozzle 13 and a coarse fiber nozzle 14 are fixedly installed on the nozzle fixing frame. The fine fiber nozzle 13 is located above the central axis 11, and the coarse fiber nozzle 14 is located on one side below the central axis 11, so that the coarse and fine fibers will intersect and merge before being attached to the central axis 11 after being sprayed out. The mounting frame 8 is also provided with a negative pressure adsorption mechanism for preventing the coarse and fine fibers from being disturbed by the airflow and ensuring the smooth combination of the two. The negative pressure adsorption mechanism includes a rotatable three-way pipe 17, an axis frame is provided on the mounting frame 8, the three-way pipe 17 passes through the axis frame and is rotatably connected to the axis frame, a third motor is fixedly installed on the axis frame for driving the three-way pipe 17 to rotate, and meshing gears are provided on the third motor and the three-way pipe 17, and the two are transmitted through gears, and a block 22 for controlling the ventilation path is slidably installed in the three-way pipe 17, and the block 22 will block the ventilation port of the first air duct 19 below as the three-way pipe 17 flips, so that the suction force of the first air duct 19 and the second air duct 20 above is more concentrated, and two first air ducts 19 for extending to the inside of the central axis 11 are provided on the three-way pipe 17, and a retractable second air duct 20 is provided in the two first air ducts 19, and a slide groove is provided in the first air duct 19, and a limiting convex strip is provided on the surface of the second air duct 20, and the limiting convex strip extends to the slide groove to mesh with and be slidably connected to the slide groove, so that the second air duct 20 Only axial telescopic movement can be performed in the first air duct 19, an internal threaded tube is fixedly installed in the second air duct 20, a second screw is rotatably installed in the first air duct 19, one end of the second screw extends into the internal threaded tube and is threadedly connected to the internal threaded tube, a fourth motor for driving the second screw is also provided in the first air duct 19, so that the second air duct 20 can be telescopic as needed, strip air outlets are provided on the first air duct 19 and the second air duct 20, a suction fan 23 connected to the three-way pipe 17 is provided at the bottom of the frame 1, a curved tube 18 is rotatably installed on the three-way pipe 17, one end of the curved tube 18 is connected to the suction outlet of the suction fan 23 by the same corrugated tube, so as to ensure that the three-way pipe 17 can be connected to the suction fan 23 and can also be rotated at the same time, so that the first air duct 19 and the second air duct 20 can form a negative pressure from the inside of the central axis 11 to adsorb the coarse and fine fibers that meet after being ejected and the airflow ejected therefrom.

[0019] Through the above technical scheme, by removing the transfer roller in the traditional melt-blown equipment, and setting the fine fiber nozzle 13 above the central axis 11, and increasing the wind force of the fine fiber nozzle 13 as needed, and then setting the coarse fiber nozzle 14 below the side of the central axis 11, the nozzle of the coarse fiber nozzle 14 is tilted upward, so that it forms a cross-convergence with the fine fiber nozzle 13 during the fiber spraying operation, directly interweaving and combining, so that the coarse and fine fibers are combined more fully and thoroughly. At the same time, in addition to the advantage of making the coarse and fine fibers more fully combined, this arrangement method has the advantage of making the coarse and fine fibers more fully combined. When the airflows ejected from the fine fiber nozzle 13 and the coarse fiber nozzle 14 intersect, the fine fibers and the coarse fibers are already in an interwoven state, so that the disturbed airflow generated when the two airflows intersect has a lower impact on the melt-blown molding work, and the central axis 11 can also be adjusted up and down and left and right through the slide mechanism, so as to adjust the relative position between the central axis 11 and the fine fiber nozzle 13 and the coarse fiber nozzle 14, so as to adapt to different needs during production and improve the applicability of the entire equipment.

[0020] Please combine Figure 8 and Fig. 9 An iron push ring 24 is slidingly sleeved on the first air duct 19, a first magnet 25 for driving the iron push ring 24 to move is embedded in the second air duct 20, and a second magnet 26 for limiting the iron push ring 24 is embedded in the first air duct 19. The magnetism of the second magnet 26 is greater than that of the first magnet 25, so that the second air duct 20 can remove the cut melt-blown filter element by telescoping, and it is recommended that the first magnet 25 and the second magnet 26 preferably use neodymium magnets, which have strong magnetic force and are permanent magnets.

[0021] Through the above technical scheme, in order to make the negative pressure adsorption mechanism perfectly adapt to the melt-blown device and solve the problem that the central axis 11 cannot be normally loaded or unloaded after the negative pressure adsorption mechanism is installed, the present application sets the negative pressure adsorption mechanism at the discharge end of the central axis 11, and adopts a scheme of rotating and alternating two sets of first air ducts 19 and second air ducts 20, so that when the cutting machine 15 cuts the melt-blown filter element and the central axis 11, the second air duct 20 can be retracted, and then the cut filter element can be transferred, so that the two sets of first air ducts can be rotated and rotated. The first and second air ducts 19 and 20 are replaced in turn, and cooperate with the iron push ring 24, the first magnet 25 and the second magnet 26, so that the second air duct 20 can remove the cut filter element by telescoping, thereby realizing the function of negative pressure suction and allowing the filter element to be smoothly discharged to complete the unloading work. Moreover, compared with directly withdrawing the first and second air ducts 19 and 20 from the central axis 11 for cutting and unloading, the use of this rotating unloading method is relatively less restricted by space, and there is no need to reserve space for the displacement of the negative pressure adsorption mechanism.

[0022] Please combine Figure 8 and Fig. 9 One end of the iron push ring 24 is fixedly connected to a telescopic bellows sleeve 27, and the other end of the telescopic bellows sleeve 27 is fixedly connected to the first air duct 19, so that when the central axis 11 is cut and has not yet been sleeved on the first air duct 19, the iron push ring 24 can drive the telescopic bellows sleeve 27 to seal the strip air outlet on the first air duct 19, thereby preventing the suction force of part of the second air duct 20 from being diverted.

[0023] Please combine Figure 8 and Fig. 9 A blocking cover 21 is rotatably installed at one end of the second air duct 20, and the blocking cover 21 is in sliding contact with the inner wall of the central axis 11, which can not only be used to stabilize the central axis 11, but also can seal the gap between the second air duct 20 and the central axis 11, thereby ensuring the adsorption force in the area of ​​the second air duct 20.

[0024] Please combine Figure 6A roller frame 12 for supporting the central axis 11 is provided on the mounting frame 8. The roller frame 12 is composed of a bracket and two supporting rollers rotatably mounted on the bracket, so as to stabilize and support the central axis 11.

[0025] The implementation principle of an ultrafine fiber melt-blown filter element production device in the embodiment of the present application is: Before use, the fine fiber nozzle 13 and the coarse fiber nozzle 14 are connected to the extruder, the air compressor and the air heater, and then the central shaft 11 is placed on the conveying mechanism, and the central shaft 11 is driven to move axially and rotate circumferentially by the conveying mechanism. During this process, the first air duct 19 and the second air duct 20 at the top extend into the central shaft 11, and the suction fan 23 generates negative pressure inside the central shaft 11, so that the central shaft 11 has adsorption force; At the same time, the fine fiber nozzle 13 and the coarse fiber nozzle 14 spray out fine fibers and coarse fibers respectively, and the coarse and fine fibers intersect and merge in the area close to the central axis 11, and then attach to the rotating central axis 11 together. Since the fine fiber nozzle 13 and the coarse fiber nozzle 14 will also spray out airflow when spraying fibers, when the airflow impacts the coarse and fine fibers and the central axis 11, turbulent airflow will occur and disturb the coarse and fine fibers, affecting the melt-blowing effect. At this time, the central axis 11 has adsorption force, which can greatly reduce the impact of turbulent airflow on the fibers, so that the fibers can be stably attached to the central axis 11 (the negative pressure adsorption mechanism is recommended to be turned on and used after the melt-blown filter element is initially formed, because the central axis 11 itself is a hollow shape, which makes it difficult for the initial airflow to generate turbulence due to impact when it is sprayed on the central axis 11, and excessive suction after turning it on may also affect the adhesion of the fiber filaments. Therefore, it is best to turn on the negative pressure adsorption mechanism after the filter element is initially formed); When the melt-blown filter element is partially melt-blown in the first air duct 19 area, the second air duct 20 at the top is retracted into the corresponding first air duct 19 together with the internal threaded tube under the drive of the second screw. Subsequently, the second electric push rod drives the cutting machine 15 to cut the rotating central shaft 11 and the filter element attached to the central shaft 11. After the cutting is completed, the three-way pipe 17 is driven by the third motor to rotate 180 degrees to exchange the positions of the two groups of first air ducts 19 and second air ducts 20. At this time, the second air duct 20 turned to the top extends out from the corresponding first air duct 19 and extends into the central shaft 11 that is undergoing melt-blowing, so as to continue to adsorb the fibers until the central shaft 11 is again sheathed in the first air duct 19 with melt-blowing and movement to prepare for the next cutting. The first air duct 19 and the second air duct 20 which are provided with the processed melt-blown filter element are transferred to the bottom, and the second air duct 20 extends out from the first air duct 19, and the iron push ring 24 is adsorbed and driven to move by the first magnet 25, and the iron push ring 24 drives the melt-blown filter element to move until the iron push ring 24 moves to the second magnet 26 and is adsorbed by the second magnet 26, and the melt-blown filter element is transferred to the second air duct 20. At this time, the second air duct 20 is retracted into the first air duct 19 again, and the iron push ring 24 is restricted by the second magnet 26 to stop in place to restrict the melt-blown filter element (to prevent it from being affected by the second air duct 20 and recovered synchronously), and when the second air duct 20 is completely retracted into the first air duct 19, the melt-blown filter element that loses the support of the second air duct 20 directly falls onto the material guide trough 16, thereby completing the melt-blowing work of the filter element.

[0026] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A superfine fiber melt-blown filter element production device, comprising: A frame (1), wherein a mounting frame (8) capable of adjusting position is disposed on the frame (1), a conveying mechanism and a cutting machine (15) are disposed on the mounting frame (8), a central axis (11) is disposed on the conveying mechanism, and a fine fiber nozzle (13) and a coarse fiber nozzle (14) are also disposed on the frame (1), characterized in that: The fine fiber nozzle (13) is located above the central axis (11), and the coarse fiber nozzle (14) is located on the side below the central axis (11), so that the coarse and fine fibers will intersect and merge after being sprayed out before being attached to the central axis (11); The mounting frame (8) is also provided with a negative pressure adsorption mechanism for preventing the coarse and fine fibers from being disturbed by the airflow and ensuring the smooth combination of the two. The negative pressure adsorption mechanism comprises a rotatable three-way pipe (17), a block (22) capable of controlling a ventilation path being slidably mounted in the three-way pipe (17), two first air ducts (19) for extending to the interior of the central axis (11) being arranged on the three-way pipe (17), a retractable second air duct (20) being arranged in each of the two first air ducts (19), strip-shaped air outlets being arranged on each of the first air ducts (19) and the second air duct (20), and a suction fan (23) connected to the three-way pipe (17) being arranged at the bottom of the frame (1), so that the first air duct (19) and the second air duct (20) can form a negative pressure from the interior of the central axis (11) to adsorb the coarse and fine fibers that meet after being ejected and the airflow ejected therefrom.

2. The ultrafine fiber melt-blown filter element production device according to claim 1, characterized in that: The frame (1) is provided with a slide mechanism, the slide mechanism comprising a slide (2) fixedly mounted on the top of the frame (1), the slide (2) being provided with a rotatable first screw (4) and a first motor (3) for driving the first screw (4), a slide plate (6) being slidably mounted on the slide (2), an internal thread block (5) being threadedly sleeved on the first screw (4) and fixedly connected to the slide plate (6), and four first electric push rods (7) distributed in a rectangular shape being provided on the slide plate (6), the output rods of the four first electric push rods (7) being fixedly connected to the bottom of the mounting frame (8), thereby adjusting the relative positions between the central axis (11) and the fine fiber nozzle (13) and the coarse fiber nozzle (14).

3. The ultrafine fiber melt-blown filter element production device according to claim 1, characterized in that: An iron push ring (24) is slidably sleeved on the first air duct (19), a first magnet (25) for driving the iron push ring (24) to move is embedded on the second air duct (20), a second magnet (26) for limiting the iron push ring (24) is embedded on the first air duct (19), and the magnetic property of the second magnet (26) is greater than that of the first magnet (25), so that the second air duct (20) can be telescoped to remove the cut melt-blown filter element.

4. The ultrafine fiber melt-blown filter element production device according to claim 3, characterized in that: One end of the iron push ring (24) is fixedly connected to a telescopic bellows sleeve (27), and the other end of the telescopic bellows sleeve (27) is fixedly connected to the first air duct (19), so that when the central axis (11) is cut but not yet sleeved on the first air duct (19), the iron push ring (24) can drive the telescopic bellows sleeve (27) to seal the strip-shaped air outlet on the first air duct (19), thereby preventing the suction force of the second air duct (20) from being diverted.

5. The ultrafine fiber melt-blown filter element production device according to claim 1, characterized in that: A blocking cover (21) is rotatably mounted on one end of the second air duct (20), and the blocking cover (21) is in sliding contact with the inner wall of the central axis (11), thereby not only being used to stabilize the central axis (11), but also being able to seal the gap between the second air duct (20) and the central axis (11), thereby ensuring the adsorption force in the area of ​​the second air duct (20).

6. The ultrafine fiber melt-blown filter element production device according to claim 1, characterized in that: The transmission mechanism comprises an outer cylinder (9) fixedly connected to a mounting frame (8), three slightly inclined transmission wheels (10) being rotatably mounted in the outer cylinder (9), and three second motors for driving the transmission wheels (10) being arranged in the outer cylinder (9), thereby driving the central shaft (11) to move axially and rotate circumferentially.

7. The ultrafine fiber melt-blown filter element production device according to claim 1, characterized in that: The mounting frame (8) is provided with a roller frame (12) for supporting the central axis (11), so as to stabilize and support the central axis (11).

8. The ultrafine fiber melt-blown filter element production device according to claim 1, characterized in that: The mounting frame (8) is provided with an axle frame, the three-way pipe (17) passes through the axle frame and is rotatably connected to the axle frame, and a third motor for driving the three-way pipe (17) to rotate is fixedly mounted on the axle frame.

9. The ultrafine fiber melt-blown filter element production device according to claim 1, characterized in that: An internally threaded tube is fixedly installed in the second air duct (20), a second screw is rotatably installed in the first air duct (19), one end of the second screw extends into the internally threaded tube and is threadably connected to the internally threaded tube, and a fourth motor for driving the second screw is also provided in the first air duct (19), so that the second air duct (20) can be extended or retracted as required.

10. The ultrafine fiber melt-blown filter element production device according to claim 1, characterized in that: A curved tube (18) is rotatably mounted on the three-way tube (17), and one end of the curved tube (18) is connected to the air suction port of the suction fan (23) via the same corrugated tube.

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