CN111472097A - Melt-blown strand preparation device and preparation method thereof - Google Patents

Abstract

The invention discloses a melt-blown wire material preparation device and a preparation method thereof, comprising: a melt-blown nozzle and a conveyor belt, a tightening groove connected with the conveyor belt, and collection mechanisms on both sides of the conveyor belt, the tightening groove Located at the end of the conveyor belt in the conveying direction, the tightening groove is a conical groove body, and the enclosing range of the tightening groove groove body gradually increases on the melt-blown material conveying route, forming a complete surrounding at the end of the melt-blown material conveying direction. , the tightening tank is provided with a pressure sensor at the end of the melt-blown material transmission direction, the pressure sensor measurement direction is toward the side of the tightening tank, and the collection mechanism is composed of a collection plate and a collection wheel. Each side is respectively provided with a number of the collection wheels of different sizes, the collection wheels are located on the side of the collection plate close to the conveyor belt, the present invention prepares melt-blown strands with strong decontamination ability, instead of traditional fiber yarns, The wire-wound filter element made can greatly improve the decontamination effect.

Description

A kind of melt-blown strand preparation device and preparation method thereof

technical field

The invention relates to the field of environmentally friendly wire wound filter elements, which can be used for the filtration treatment of gas-liquid two-phase substances, and in particular, to a melt-blown wire material preparation device and a preparation method thereof.

Background technique

The wire-wound filter element is made of finely wound textile fiber yarn with good filtering performance on a porous skeleton. Its yarn materials include polypropylene fiber, acrylic fiber, absorbent cotton fiber, etc. By controlling the winding tightness and thinness of the yarn during winding, filter elements of different precision can be made.

Wire-wound filter element is a kind of deep filter element, which is used for low-viscosity and low-impurity filtration. It has a honeycomb structure with sparse outside and dense inside, which can effectively remove suspended solids, particles, rust and other sundries in the fluid, and has very good filtering characteristics.

A well-wound wound-type filter element can show the filtering effect of a depth-type filter material. The ideal condition is that it becomes denser and denser from the outside to the inside. Therefore, when winding, the thickness of the wire or the different winding tension must be used. In order to control the density of the filter material, the wound filter element with such a dense inner and outer sparse structure can have the depth effect of the depth type filter material, effectively improve the filtration efficiency, and intercept more impurities. The filtration accuracy of the wire-wound filter material is determined by the thickness of the wire and the density of the winding. , the filtering accuracy will be higher. However, in the process of filtration, the filter material must be able to maintain its specific structure and pore size in order to provide stable and uniform filtration quality.

However, most of the winding filter elements are mostly wound by placing fiber yarns, and the interception of dirt particles can only be achieved by the extrusion between the fiber yarns. The yarn itself does not have the ability to filter independently. The strong melt-blown yarn replaces the fiber yarn, which greatly improves the filtration capacity of the winding filter element.

SUMMARY OF THE INVENTION

The invention overcomes the deficiencies of the prior art, and provides a melt-blown strand preparation device and a preparation method thereof.

In order to achieve the above-mentioned purpose, the technical scheme adopted in the present invention is: a melt-blown strand preparation device and a preparation method thereof, comprising: a melt-blown nozzle and a conveyor belt, a tightening groove connected with the conveyor belt, and two sides of the conveyor belt The collection mechanism, the tightening groove is located at the end of the conveyor belt in the conveying direction, the tightening groove is a conical groove body, and the enclosing range of the tightening groove groove body gradually increases on the melt-blown material conveying route. The end of the spray material conveying direction forms a complete enclosure, the tightening tank is provided with a pressure sensor at the end of the melt-blown material conveying direction, the pressure sensor measurement direction is toward the side of the tightening tank, and the collection mechanism is composed of a collection plate. and a collection wheel, each side of the collection mechanism is provided with a plurality of collection wheels of different sizes, and the collection wheels are located on the side of the collection plate close to the conveyor belt.

In a preferred embodiment of the present invention, the collecting plate faces the side of the melt-blown nozzle, and there is an electric heating wire near the conveyor belt, which can melt the melt-blown material on the collecting plate and the melt-blown material on the conveyor belt. separation.

In a preferred embodiment of the present invention, the collecting wheel is close to the collecting plate, the axial direction of the collecting wheel is parallel to the collecting plate, the surface of the collecting wheel is provided with a raised cutting edge, and the collecting wheel cuts when it rotates. The blade is in contact with the collection plate.

In a preferred embodiment of the present invention, the collecting plate is hingedly connected to the conveyor belt, and the angle between the collecting plate and the conveyor belt on one side of the material laying ranges from 80° to 180°.

In a preferred embodiment of the present invention, the collecting plate is smooth, and the melt-blown material does not adhere to the collecting plate.

In a preferred embodiment of the present invention, the collection wheel is located at the bottom of the collection plate, and the meltblown material on the collection plate falls off naturally and falls on the collection wheel.

In a preferred embodiment of the present invention, the number of cutting edges on each collecting wheel is the same.

In a preferred embodiment of the present invention, the length of the collecting wheel is the same as the length of the collecting plate.

In a preferred embodiment of the present invention, the collecting surface of the collecting plate is parallel to the conveying direction of the conveyor belt.

The present invention also provides a preparation method of melt-blown strand, which is characterized in that comprising the following steps:

(1) The melt-blown nozzle sprays the conical melt-blown material, the melt-blown material in the conical center area falls on the conveyor belt, and the melt-blown material in the conical edge area falls on the collection mechanisms on both sides of the conveyor belt.

(2) The electric heating wire on the collection plate melts and cuts the meltblown material, the collection wheel is started, and the cutting edge on the collection wheel cuts itself and the meltblown material on the collection plate into strips, and the strip meltblown material falls off. On the melt-blown fabric on the conveyor belt, it is tightened by the tightening groove along the conveying direction and rolled into a thread.

(3) The tightening groove is tapered, and the force exerted on the melt-blown material increases with the conveying direction. The pressure sensor at the end of the tightening groove detects the effect of the rolled melt-blown wire on the wall of the tightening groove. The extrusion stress can be obtained to obtain the firmness of the melt-blown wire material. The pressure sensor feeds back the data to the collection mechanism and the melt-blown nozzle. The melt-blown nozzle adjusts the injection height according to the extrusion stress, thereby changing the fineness in the conveyor belt and the collection mechanism. The collection mechanism activates collection wheels of different sizes, thereby changing the size of the strip-shaped meltblown material cut out by the collection wheel.

The present invention also provides a melt-blown strand, which is characterized in that: the melt-blown strand has a solid structure, the outermost layer of the melt-blown strand is wrapped with a layer of complete melt-blown fabric, and the melt-blown strand is The inner layer is made of several strip-shaped melt-blown materials. The melt-blown wire material is extruded and formed, and the inside is compact and has strong filtering ability in the diameter direction, and can be directly wound and collected to make a wire-wound filter element.

The invention also provides a nozzle with a controllable spray width, comprising: a melt-blown material cavity, and an air-jet port surrounding the periphery of the melt-blown material cavity, characterized in that: the air-jet port air-jet route and the melt-blown material The outflow routes intersect, and the ejected airflow drives the meltblown material to scatter on the conveyor belt, and the air ejection direction of the air ejection port is adjustable.

In a preferred embodiment of the present invention, the discharge port of the melt-blown nozzle is elongated, and the length direction of the melt-blown nozzle is parallel to the conveying direction of the conveyor belt.

In a preferred embodiment of the present invention, the angle between the air jet and the discharge route of the melt-blown material is in the range of 10°-80°, and the larger the angle is, the wider the melt-blown material will be on the conveyor belt. big.

The present invention solves the defects existing in the background technology, and the present invention has the following beneficial effects:

(1) In the present invention, the tightening groove is tapered, and the inner diameter gradually becomes smaller in the conveying direction, and the force applied to the melt-blown material becomes larger and larger with the conveying direction, so that the diameter of the melt-blown material can be gradually reduced until it becomes For the wire, the pressure sensor at the end of the tightening groove measures the extrusion stress of the rolled melt-blown wire on the wall of the tightening groove, so as to obtain the tightness of the inside of the melt-blown wire, and the pressure sensor converts the data. Feedback to the collection mechanism and meltblown nozzle, this feedback mechanism can timely feedback and adjust the previous process according to the condition of the wire material, so that the quality of the wire material is controllable.

The melt-blown nozzle adjusts the spray height according to the extrusion stress, thereby changing the distribution of fineness on the conveyor belt and the collection mechanism;

The collection mechanism starts the collection wheels of different diameters according to the extrusion stress. The number of cutting edges on each collection wheel is the same, and the width of the strip-shaped meltblown material cut out by the collection wheels of different diameters is different. This mechanism adjusts the inside of the meltblown wire. The degree to which the void can be compressed adjusts the firmness of the meltblown strand;

The melt-blown nozzle and the collection mechanism are coordinated and adjusted to expand the compaction range of the melt-blown strands, so that the device can produce more kinds of melt-blown strands.

(2) in the present invention, the collecting plate is provided with electric heating wire near the conveyor belt position, and the melt-blown material sprayed by the melt-blown nozzle on the collecting plate and the conveying belt is a whole. The junction is fused, and the melt-blown material on the conveyor belt continues to be curled to form the outer surface of the melt-blown wire material, and the edge of the outer surface is flat; since the collection wheel is located at one end of the collection plate close to the conveyor belt, and the collection plate is smooth without residual melt-blown material, so Most of the meltblown material on the collection plate falls in the gap between the collection wheel and the collection plate, and the collection wheel cuts the meltblown material into strips, avoiding the situation that the meltblown material does not fall off or falls off the collection wheel.

(3) In the present invention, the tightening groove is a conical groove body, and the surrounding circumference of the tightening groove body gradually becomes larger on the melt-blown material conveying route, and a complete circumference is formed at the end of the melt-blown material conveying direction, so that the most The outer layer of melt-blown fabric can be rolled into a complete ring, on the one hand, the upper surface of the melt-blown strand can be smooth, and on the other hand, the strip-shaped filling material inside the melt-blown strand can be properly wrapped to avoid leakage.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative work;

Fig. 1 is the perspective structure diagram of the preferred embodiment of the present invention;

Fig. 2 is the structure diagram of the collection mechanism of the preferred embodiment of the present invention;

3 is a structural diagram of a meltblown nozzle of a preferred embodiment of the present invention;

In the figure: 1, conveyor belt; 2, tightening groove; 21, pressure sensor; 3, collecting mechanism; 31, collecting plate; 32, collecting wheel; 321, cutting edge; 33, heating wire; 34, hinge; 4, melting Spray nozzle; 41. Meltblown material cavity; 42. Air jet port.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific implementation disclosed below. example limitations.

In the description of this application, it should be understood that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left", "right", " The orientations or positional relationships indicated by vertical, horizontal, top, bottom, inner, and outer are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and The description is simplified rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second" etc. may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood through specific situations.

As shown in Figure 1, a meltblown wire material preparation device and preparation method thereof, comprising: a meltblown nozzle 4 and a conveyor belt 1, a tightening groove 2 connected to the conveyor belt 1, and a collection mechanism 3 on both sides of the conveyor belt 1, the The tightening groove 2 is located at the end of the conveying direction of the conveyor belt 1. The tightening groove 2 is a conical groove body. The enclosing range of the groove body of the tightening groove 2 is gradually enlarged on the conveying route of the melt-blown material, and a complete surrounding is formed at the end of the conveying direction of the melt-blown material. , the tightening tank 2 is provided with a pressure sensor 21 at the end of the melt-blown material conveying direction, and the pressure sensor 21 measures the direction toward the side of the tightening tank 2, and the collecting mechanism 3 is composed of a collecting plate 31 and a collecting wheel 32. Each side of the collecting mechanism 3 A plurality of collecting wheels 32 of different sizes are respectively provided, and the collecting wheels 32 are located on the side of the collecting plate 31 close to the conveyor belt 1 .

The collecting plate 31 faces the side of the melt-blown nozzle 4, and is provided with a heating wire 33 near the conveyor belt 1, which can melt and separate the melt-blown material on the collecting plate 31 from the melt-blown material on the conveyor belt 1, and the melt-blown nozzle 4 is sprayed on the collecting plate 31. And the melt-blown material on the conveyor belt 1 is a whole. After the electric heating wire 33 heats the melt-blown material, the melt-blown material is fused at the junction of the conveyor belt 1 and the collecting plate 31, and the melt-blown material on the conveyor belt 1 continues to transmit and curl to form a melt-blown material. The outer surface of the wire material, the outer surface edge is flat; because the collection wheel 32 is located at the end of the collection plate 31 close to the conveyor belt 1, and the collection plate 31 is smooth without residual melt-blown material, so most of the melt-blown material on the collection plate 31 falls on the collection wheel. In the gap between 32 and the collecting plate 31, the cutting edge 321 of the collecting wheel 32 contacts the collecting plate 31 to cut the melt-blown material into strips, and the strip-shaped melt-blown material continues to fall on the melt-blown fabric of the conveyor belt 1, and squeezes through the tightening groove 2. Pressing the internal material that constitutes the melt-blown wire material, it should be realized that the collection plate 31 faces the side of the melt-blown nozzle 4, and other devices can be installed near the conveyor belt 1 to replace the heating wire 33, as long as the melt-blown material can be placed on the collection plate 31. And the junction of the conveyor belt 1 can be cut off, such as a cutting tool. In the preferred embodiment of the present invention, the heating wire 33 is located at the junction of the collecting plate 31 and the conveyor belt 1. It should be appreciated that the position of the heating wire 33 depends on the height of the outer wall of the conveyor belt 1 and the melt-blown wire material. The diameter of the product, when the required diameter of the meltblown wire material is large, the height of the heating wire 33 should be adjusted as far away from the conveyor belt 1 as to avoid the fabric on the conveyor belt 1 being rolled to the end of the tightening slot 2. A complete enclosure; on the contrary, when the required diameter of the meltblown wire is small, the heating wire 33 should be adjusted as close to the conveyor belt 1, and can be set on the groove wall of the tightening groove 2 when necessary.

As shown in FIG. 1 , in the pressure sensor 21 of the preferred embodiment of the present invention, the tightening groove 2 is tapered in the embodiment, and the inner diameter gradually becomes smaller in the conveying direction, and the force applied to the melt-blown material increases with the conveying direction. Large, the pressure sensor 21 at the end of the tightening groove 2 measures the extrusion stress of the melt-blown wire after being rolled up on the wall of the tightening groove 2, so as to obtain the tightness of the inside of the melt-blown wire. The pressure sensor 21 Feed back the data to the collection mechanism 3 and the meltblown nozzle 4;

The melt-blown nozzle 4 adjusts the injection height according to the extrusion stress, thereby changing the distribution of the fineness on the conveyor belt 1 and the collection mechanism 3, and the melt-blown nozzle 4 is farther away from the laying surface. The smaller the included angle of the outflow route of the material, the smaller the difference in the size of the melt-blown material in the width direction, and the higher the firmness of the melt-blown wire that is rolled out. The lower the material firmness;

The collecting mechanism 3 activates the collecting wheels 32 with different diameters according to the size of the extrusion stress. Since the length of the collecting wheels 32 is the same as that of the collecting plate 31, the number of cutting edges 321 on each collecting wheel 32 is the same, and the strips cut by the collecting wheels 32 with different diameters are the same. The width of the melt-blown material is different, and the smaller the diameter of the collecting wheel 32 is, the thinner the strip-shaped melt-blown material is cut out, and the smaller the internal space of the melt-blown wire material can be compressed during the extrusion process of the tightening groove 2, and the melt-blown line The higher the tightness of the material, the lower the tightness of the melt-blown strand is when the collecting wheel 32 with a larger diameter is activated.

As shown in FIG. 1 , in the preferred embodiment of the present invention, the tightening groove 2 is a conical groove body, and the surrounding circumference of the groove body of the tightening groove 2 gradually becomes larger on the melt-blown material conveying route, and at the end of the melt-blown material conveying direction Forming a complete circumference, so that the outermost melt-blown fabric can be rolled into a complete ring, on the one hand, the upper surface of the melt-blown wire is smooth, and on the other hand, the strip-shaped filling material inside the melt-blown wire can be properly Wrap to avoid leaks.

As shown in FIG. 2 , in the collecting mechanism 3 of the preferred embodiment of the present invention, the collecting wheel 32 is close to the collecting plate 31 , the collecting wheel 32 is axially parallel to the collecting plate 31 , the surface of the collecting wheel 32 is provided with a raised cutting edge 321 , and the collecting wheel 32 rotates When the cutting edge 321 is in contact with the collecting plate 31, in this example, the length of the collecting wheel 32 is the same as that of the collecting plate 31, the number of cutting edges 321 on each collecting wheel 32 is the same, and the strip-shaped meltblown material cut out by the collecting wheel 32 of different diameters is wide. With different sides, the smaller the diameter of the collecting wheel 32 is, the thinner the strip-shaped melt-blown material is cut out, the smaller the internal space of the melt-blown wire material can be compressed during the extrusion process of the tightening groove 2, and the tighter the melt-blown wire material is. On the contrary, the larger the diameter of the collection wheel 32 is activated, the lower the tightness of the meltblown strands. It should be realized that the number and size distribution of the collection wheel 32, and the length of the collection wheel 32 can be adjusted according to the product conditions.

As shown in FIG. 2 , the collecting plate 31 is connected with the hinge 34 of the conveyor belt 1, and the angle between the collecting plate 31 and the conveyor belt 1 is 180°-270° on the paving side. In this example, the collecting plate 31 and the conveyor belt 1 are on the paving side. The included angle is 180°. In this state, the device of the present invention is placed horizontally, and the collecting plate 31 is close to the horizontal plane. In this example, when the melt-blown material falls on the collecting plate 31, the melt-blown material can freely fall under the action of gravity. In the example, the collector plate 31 uses a flat surface with a smooth surface, and the meltblown material will not adhere to the collector plate 31 .

As shown in FIG. 2 , in the collecting mechanism 3 of the preferred embodiment of the present invention, preferably, the number of cutting edges 321 on each collecting wheel 32 is the same, the length of the collecting wheel 32 is the same as that of the collecting plate 31 , and the collecting surface of the collecting plate 31 is conveyed by the conveyor belt 1 . The directions are parallel. It should be appreciated that the number of cutting edges 321 on each collecting wheel 32 can be adjusted. When the diameter of the collecting wheel 32 is constant, the more the number of cutting edges 321 on the surface of the collecting wheel 32, the finer the cut meltblown filling material and the compressible There is a preferred embodiment of the present invention. The cutting edges 321 are arranged obliquely on the surface of the collecting wheel 32. The cutting edges 321 have a shorter length near the two ends of the collecting wheel 32, and a longer length near the middle of the collecting wheel 32. The cut out meltblown filler material is also distinguished by length, which can improve the graded decontamination ability of the meltblown wire.

In the present invention, the obtained melt-blown strand has a solid structure, the outermost layer of the melt-blown strand is wrapped with a complete layer of melt-blown fabric, the inner layer of the melt-blown strand is a plurality of strip-shaped melt-blown materials, and the melt-blown strand is extruded by extrusion. Press-molded, compact inside, strong filtering ability in the diameter direction, and can be directly wound and collected to make a wound filter element, preferably, a double-layer structure is adopted in this example, and a collection mechanism 3 and a melt-blown filter are provided at the head end of the conveyor belt 1 Nozzle 4, the melt-blown nozzle 4 lays the first layer of melt-blown fabric on the conveyor belt 1, and the collection mechanism 3 lays the first layer of strip-shaped filling material on the first melt-blown fabric, and when it travels along the conveying route to the tightening groove 2 at the head end, the tightening groove 2 is also provided with a collection mechanism 3 and a melt-blown nozzle 4, where the melt-blown nozzle 4 lays a second layer of melt-blown fabric on the first layer of strip-shaped filling material, and the collection mechanism 3 is at the most The inner layer is then covered with a second layer of filling material. After the above-mentioned product is conveyed through the closed circumference at the end of the tightening groove 2, a melt-blown strand with a double-layer filling structure is formed. It should be realized that the layering of the melt-blown strand depends on the conveyor belt. 1 and the length and inner diameter of the tightening groove 2, and also depend on the filtration capacity of the desired product.

The melt-blown strand produced by the preferred embodiment of the present invention is provided with a wire reel at the discharge port at the end of the tightening groove 2. After the melt-blown wire passes through the end, it directly rotates the tangent along the wire winder and enters the winder, thereby obtaining melt-blown wire. The spray material is a wound filter element made of raw materials.

As shown in FIG. 3 , a nozzle with a controllable spray width according to a preferred embodiment of the present invention includes: a melt-blown material cavity 41 , and an air-jet port 42 surrounding the periphery of the melt-blown material chamber 41 , and is characterized in that: the air-jet port 42 is air-jetted The route intersects with the outflow route of the melt-blown material, and the spouted airflow drives the melt-blown material to scatter on the conveyor belt, and the air-jet direction of the air-jet port 42 is adjustable. The length direction of the spray nozzle 4 is parallel to the conveying direction of the conveyor belt 1, the air injection port 42 is located on both sides of the length direction of the discharge port of the meltblown nozzle 4, and the air injection route faces the direction of the collecting plate 31. Regarding the denier distribution on the conveyor belt 1 and the collecting plate 31, it should be appreciated that the meltblown nozzle 4 can adopt different forms, as long as it is ensured that both the conveyor belt 1 and the collecting plate 31 can be sprayed with meltblown material.

When the present invention is used, the melt-blown nozzle 4 sprays the conical melt-blown material, the melt-blown material in the conical center area falls on the conveyor belt 1, and the melt-blown material in the conical edge area falls on the collection plate 31 on the collection mechanism 3 on both sides of the conveyor belt 1 The heating wire 33 melts and cuts the melt-blown material, the collection wheel 32 is activated, the cutting edge 321 on the collection wheel 32 cuts itself and the melt-blown material on the collection plate 31 into strips, and the strip-shaped melt-blown material falls on the conveyor belt 1 On the melt-blown fabric, it is tightened and rolled by the tightening groove 2 along with the conveying direction to form a thread.

The ideal embodiments of the present invention are inspired by the above, and relevant persons can make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims (10)

1. a melt-blown strand preparation device, comprising: several melt-blown nozzles, a conveyor belt near the melt-blown nozzle, a tightening groove connected with the conveyor belt, and a collection mechanism on both sides of the conveyor belt, it is characterized in that , the tightening groove is located at the end of the conveying direction of the conveyor belt, the tightening groove is a truncated conical groove body, and the surrounding angle range of the circumference of the tightening groove groove body gradually increases on the delivery route of the meltblown material, and the The end of the melt-blown material conveying direction forms a complete enclosure, the tightening groove is provided with a pressure sensor at the end of the melt-blown material conveying direction, and the pressure sensor measurement direction is toward the side of the tightening groove, and the collection mechanism is collected by A plate and a collecting wheel are formed. Each side of the collecting mechanism is respectively provided with at least one collecting wheel, and the collecting wheel is located on the side of the collecting plate close to the conveyor belt. 2. A melt-blown wire material preparation device and preparation method thereof according to claim 1, characterized in that: the collecting plate faces one side of the melt-blown nozzle, and a heating wire is provided near the conveyor belt position, The melt-blown material on the collecting plate can be melted and separated from the melt-blown material on the conveyor belt. 3. A meltblown wire preparation device according to claim 1, characterized in that: the collection wheel is close to the collection plate, the collection wheel is axially parallel to the collection plate, and the surface of the collection wheel is set. There are raised cutting edges, which are in contact with the collecting plate when the collecting wheel rotates. 4 . The device for preparing melt-blown strands according to claim 1 , wherein the collecting plate is smooth, and the melt-blown material does not adhere to the collecting plate. 5 . 5 . The device for preparing meltblown strands according to claim 1 , wherein the collection wheel is located at the bottom of the collection plate, and the meltblown material on the collection plate naturally falls on the collection wheel after falling off. 6 . . 6. A melt-blown wire preparation device according to claim 1, wherein the melt-blown nozzle comprises a melt-blown material cavity and a jet port surrounding the periphery of the melt-blown material chamber, and the jet port jet route It intersects with the outflow route of the melt-blown material, and the ejected airflow drives the melt-blown material to scatter on the conveyor belt, and the air-jet direction of the air-jet port is adjustable. 7 . The device for preparing melt-blown strands according to claim 6 , wherein the discharge port of the melt-blown nozzle is elongated, and the length direction of the melt-blown nozzle is parallel to the conveying direction of the conveyor belt. 8 . 8. based on the preparation method of any one melt-blown strand preparation device described in claim 1-7, is characterized in that, comprises the following steps: (1) The melt-blown nozzle sprays the conical melt-blown material, the melt-blown material in the conical center area falls on the conveyor belt, and the melt-blown material in the conical edge area falls on the collection mechanisms on both sides of the conveyor belt. (2) The electric heating wire on the collection plate melts and cuts the meltblown material, the collection wheel is started, and the cutting edge on the collection wheel cuts itself and the meltblown material on the collection plate into strips, and the strip meltblown material falls off. On the melt-blown fabric on the conveyor belt, it is tightened by the tightening groove along the conveying direction and rolled into a thread. (3) The tightening groove is a truncated cone, and the force exerted on the melt-blown material increases with the conveying direction. The pressure sensor at the end of the tightening groove detects that the rolled melt-blown wire material has an impact on the wall of the tightening groove. The extrusion stress of the melt-blown strand can be obtained to obtain the tightness of the melt-blown strand. The pressure sensor feeds back the data to the collection mechanism and the melt-blown nozzle. The melt-blown nozzle adjusts the spray height according to the extrusion stress, thereby changing the fineness in the conveyor belt and collection. Distribution on the mechanism; the collection mechanism activates collection wheels of different sizes, thereby changing the size of the strip-shaped meltblown material cut out by the collection wheel. 9. The preparation method of a melt-blown strand preparation device according to claim 8, characterized in that: a plurality of the melt-blown nozzles are distributed on the conveying route of the conveyor belt, and the melt-blown nozzles spray out the melt-blown material The fineness gradually decreases with the advancement of the conveying route. 10. based on a kind of melt-blown strand described in claim 1-6, it is characterized in that: described melt-blown strand is a solid structure, and the outermost layer of described melt-blown strand is wrapped with a complete layer of melt-blown fabric , the inner layer of the melt-blown wire material is several strip-shaped melt-blown materials, the fineness of the melt-blown wire material changes from small to large in the length direction, the melt-blown wire material is formed by extrusion, the interior is compact, and the diameter It has strong directional filtering ability and can be directly wound and collected to make a wound filter element.

Images