Warp knitting machine yarn guide device for reverse osmosis membrane base material and working method of warp knitting machine yarn guide device

Abstract

The invention belongs to the technical field of conveying, and particularly relates to a guider of a filament-shaped material, in particular to a warp knitting machine yarn guide device for a reverse osmosis membrane base material and a working method of the warp knitting machine yarn guide device for the reverse osmosis membrane base material, and the warp knitting machine yarn guide device for the reverse osmosis membrane base material is used for respectively guiding a plurality of yarns through a yarn guide mechanism; a plurality of yarn guide grooves are formed in the outer wall of the yarn guide wheel in the axial direction, the yarn guide grooves are annular and are formed in the circumferential direction of the outer wall of the yarn guide wheel, and the section of the inner bottom face of each yarn guide groove is in the shape of an oval arc, so that yarn is guided through rotation of the yarn guide wheel when passing through the yarn guide grooves; at the moment, due to the fact that the yarn is evenly contacted with the oval arc-shaped inner bottom face after being pressed downwards through the tensioning force, even contact between the yarn and the yarn guiding groove is achieved in the yarn guiding process, excessive friction caused by excessive pressure is avoided, the yarn is prevented from being abraded, and the quality of the yarn is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of conveying technology, specifically relating to guides for filamentous materials, and more particularly to a warp knitting machine yarn guiding device for reverse osmosis membrane substrate and its working method. Background Technology

[0002] As a key component of reverse osmosis membrane elements, the performance of the reverse osmosis membrane substrate directly affects the filtration efficiency, service life, and stability of the membrane. Currently, reverse osmosis membrane substrates are mostly made from materials such as polyester fibers through weaving and composite processes to meet core requirements such as support strength, chemical resistance, and water flow conductivity. Therefore, the yarn weaving process is particularly important. In related technologies, yarn weaving still uses warp knitting machines, where guide rollers guide and adjust the tension of the yarn. However, existing guide rollers typically have U-shaped guide grooves to prevent yarn wobbling during operation. For example, prior art with publication number JP7130365B2 discloses a guide pulley with a vertically oriented U-shaped groove structure on its running surface, which effectively constrains the lateral displacement of the yarn during reciprocating motion. However, after long-term use, it has been found that this method still has some shortcomings in guiding the yarn of the reverse osmosis membrane substrate. In the process of dynamic operation, the yarn undergoes elastic deformation under the pressure of tension and the reaction force of the guide roller. Its cross-section changes from an ideal circle to a flattened ellipse. The geometry of the rigid U-shaped groove remains fixed. When a soft, deformable yarn enters this rigid, fixed-shape groove, it will be forced to adapt, resulting in excessive wear of the yarn. For yarns that need to be surface modified later, excessive wear will lead to a decrease in the mechanical properties and water permeability after modification, thus causing a decline in the quality of the reverse osmosis membrane.

[0003] Therefore, due to the technical problem of excessive wear between the yarn and the guide roller after yarn deformation, which leads to a decline in the quality of the finished reverse osmosis membrane, it is necessary to design a warp knitting machine yarn guiding device and its working method for reverse osmosis membrane substrate.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0005] This disclosure provides at least one warp knitting machine yarn guiding device for reverse osmosis membrane substrate and its working method.

[0006] In a first aspect, embodiments of this disclosure provide a warp knitting machine yarn guiding device for a reverse osmosis membrane substrate, comprising: The yarn guiding mechanism is configured to guide multiple yarns separately; The yarn guiding mechanism includes: a plurality of yarn guiding wheels; The outer wall of the yarn guide wheel is provided with a plurality of yarn guide grooves along the axial direction. The yarn guide grooves are annular and arranged along the circumference of the outer wall of the yarn guide wheel. The cross-section of the yarn guide groove is elliptical. When the yarn passes through the yarn guide groove, it is guided by the rotation of the yarn guide wheel. At this time, due to the tension, the yarn is pressed down and makes uniform contact with the inner bottom surface of the elliptical arc.

[0007] In one optional embodiment, a through hole is provided at the center of the yarn guide wheel along the axial direction; The bottom surface of the yarn guide groove is provided with several pairs of air holes at equal intervals along the circumference. In each pair of air holes, one air hole is located near the inner side wall of the yarn guide groove, and the other air hole is located near the other inner side wall of the yarn guide groove. All the pores are connected to the through holes.

[0008] In one optional embodiment, the yarn guiding mechanism further includes: a support shaft; The support shaft is mounted on the bracket and passes through the through holes of each guide wheel, with the guide wheel and support shaft being rotatably connected. The outer wall of the support shaft is provided with a strip-shaped air intake along its axial direction. When the support shaft is arranged laterally, the air intake is located at the top of the support shaft.

[0009] In one optional embodiment, when the yarn passes through the corresponding yarn guide groove, the yarn contacts the inner bottom surface of the top part of the yarn guide groove. At this time, a pair of air holes located at the top of the yarn guide groove are aligned and connected with the air suction part, and the pair of air holes at the top of the yarn guide groove are covered by the yarn. The air suction part draws air in the direction of the yarn guide wheel axis, and the negative pressure pulls the yarn in the yarn guide groove to contact the inner bottom surface of the yarn guide groove near the inner sidewall, so that the yarn contacts the elliptical arc inner bottom surface of the yarn guide groove evenly.

[0010] In one optional embodiment, the support shaft is hollow, the air intake part is connected to the hollow part, and the hollow part is connected to the air extraction device. The air extraction device is used to extract air so that when the air hole is aligned and connected with the air intake part, it drives the air hole to draw air in the direction of the guide wheel axis.

[0011] Secondly, embodiments of this disclosure also provide a weaving system, comprising: The aforementioned warp knitting machine yarn guiding device for reverse osmosis membrane substrate.

[0012] In one alternative embodiment, a warp knitting machine is provided on one side of the yarn guiding device; The warp knitting machine is configured to knit yarns guided by a yarn guide device.

[0013] Thirdly, this disclosure also provides a method for operating the warp knitting machine yarn guiding device for reverse osmosis membrane substrate described above, comprising: When the yarn passes through the yarn guide groove, it is guided by the rotation of the yarn guide wheel. At this time, due to the tension, the yarn is pressed down and makes uniform contact with the inner bottom surface of the elliptical arc.

[0014] In one optional embodiment, when the yarn passes through the corresponding yarn guide groove, the yarn contacts the inner bottom surface of the top part of the yarn guide groove. At this time, a pair of air holes located at the top of the yarn guide groove are aligned and connected with the air suction part, and the pair of air holes at the top of the yarn guide groove are covered by the yarn. The air suction part draws air in the direction of the yarn guide wheel axis, and the negative pressure pulls the yarn in the yarn guide groove to contact the inner bottom surface of the yarn guide groove near the inner sidewall, so that the yarn contacts the elliptical arc inner bottom surface of the yarn guide groove evenly.

[0015] In one alternative embodiment, air is drawn in by an air extraction device so that when the air hole is aligned and connected with the air intake, the air hole is driven to draw air in the direction of the guide wheel axis.

[0016] The beneficial effects of this invention are that the warp knitting machine yarn guiding device for reverse osmosis membrane substrate guides multiple yarns separately through the yarn guiding mechanism; several yarn guiding grooves are opened axially on the outer wall of the yarn guiding wheel, the yarn guiding grooves are annular and arranged circumferentially along the outer wall of the yarn guiding wheel, and the cross-section of the inner bottom surface of the yarn guiding groove is elliptical arc, so that when the yarn passes through the yarn guiding groove, the yarn is guided by the rotation of the yarn guiding wheel. At this time, due to the tension force, the yarn is pressed down and makes uniform contact with the inner bottom surface of the elliptical arc, thereby achieving uniform contact between the yarn and the yarn guiding groove during the yarn guiding process, avoiding excessive friction caused by excessive pressure, avoiding yarn wear and ensuring yarn quality.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a warp knitting machine yarn guiding device for a reverse osmosis membrane substrate provided in an embodiment of the present disclosure; Figure 2 This is a schematic diagram of the structure of a yarn guide wheel provided in an embodiment of the present disclosure; Figure 3 A cross-sectional view of a yarn guide wheel provided in an embodiment of this disclosure; Figure 4 This is a schematic diagram of a support shaft provided in an embodiment of the present disclosure; Figure 5 This is a schematic diagram of the structure of a weaving system provided in an embodiment of the present disclosure.

[0021] In the picture: 1. Yarn guiding mechanism, 11. Yarn guiding wheel, 111. Through hole, 12. Yarn guiding groove, 121. Air hole, 13. Support shaft, 131. Air suction part, 14. Bracket, 2. Warp knitting machine. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0024] During dynamic operation, the yarn undergoes elastic deformation under the pressure of tension and the reaction force of the guide rollers. Its cross-section changes from an ideal circle to a flattened ellipse. The geometry of the rigid U-shaped groove remains fixed. When a soft, deformable yarn enters this rigid, fixed-shape groove, it undergoes forced adaptation, which leads to excessive wear on the yarn. For yarns that require subsequent surface modification, excessive wear will result in a decrease in the mechanical properties and water permeability after modification, thus causing a decline in the quality of the reverse osmosis membrane product.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, at least one disclosed embodiment provides a warp knitting machine yarn guiding device for reverse osmosis membrane substrate, comprising: a yarn guiding mechanism 1 configured to guide multiple yarns separately; the yarn guiding mechanism 1 includes: a plurality of yarn guiding wheels 11; a plurality of yarn guiding grooves 12 are axially formed on the outer wall of the yarn guiding wheels 11, the yarn guiding grooves 12 are annular and arranged circumferentially along the outer wall of the yarn guiding wheels 11; the cross-section of the yarn guiding grooves 12 is elliptical arc; when the yarn passes through the yarn guiding grooves 12, the yarn is guided by the rotation of the yarn guiding wheels 11, and at this time, due to the tension, the yarn is pressed down and makes uniform contact with the inner bottom surface of the elliptical arc, thereby achieving uniform contact between the yarn and the yarn guiding grooves 12 during the yarn guiding process, avoiding excessive friction caused by excessive pressure, avoiding yarn wear and ensuring yarn quality.

[0028] In this embodiment, the cross-section of the inner bottom surface of the yarn guide groove 12 is elliptical, which allows the yarn to have a larger deformation space when it is guided by the yarn guide groove 12. The deformed yarn can make uniform contact with the inner sidewall of the yarn guide groove 12, thus avoiding excessive wear of the yarn.

[0029] In this embodiment, the yarn undergoes elastic deformation under the pressure of tension and the reaction force of the yarn guide groove 12. Its cross-section changes from an ideal circle to a flattened ellipse, which matches the cross-sectional shape of the yarn guide groove 12. This increases the contact area between the deformed yarn and the inner bottom surface of the yarn guide groove 12, reduces the pressure between the yarn and the inner bottom surface of the yarn guide groove 12, and thus reduces friction.

[0030] like Figure 2 and Figure 3As shown, in one optional embodiment, a through hole 111 is provided at the center of the yarn guide wheel 11 along the axial direction; a plurality of pairs of air holes 121 are provided at equal intervals along the circumferential direction on the bottom surface of the yarn guide groove 12, one air hole 121 in each pair is disposed near the inner sidewall of the yarn guide groove 12, and the other air hole 121 is disposed near the other inner sidewall of the yarn guide groove 12; all air holes 121 are connected to the through hole 111.

[0031] In this embodiment, the air hole 121 is located close to the inner wall of the corresponding yarn guide groove 12, so that when the air hole 121 draws in air, it can pull part of the yarn to the inner bottom surface of the yarn guide groove 12 near the inner wall, so that the part of the yarn that is pressed down and deformed can contact the inner bottom surface of the yarn guide groove 12 near the inner wall, so that the yarn contacts the inner bottom surface of the yarn guide groove 12 evenly.

[0032] like Figure 4 As shown, in an optional embodiment, the yarn guiding mechanism 1 further includes: a support shaft 13; the support shaft 13 is mounted on the bracket 14, the support shaft 13 passes through the through holes 111 of each yarn guiding wheel 11, and the yarn guiding wheel 11 is rotatably connected to the support shaft 13; a strip-shaped air suction part 131 is provided on the outer wall of the support shaft 13 along its axial direction, and when the support shaft 13 is arranged laterally, the air suction part 131 is located at the top of the support shaft 13.

[0033] In this embodiment, the yarn drives the guide wheel 11 to rotate as it moves.

[0034] In this embodiment, the strip-shaped air intake 131 can be aligned and connected with the air holes 121 at the top of each yarn guide groove 12.

[0035] In this embodiment, a baffle for limiting the movement of the guide wheel 11 can be provided on the support shaft 13. That is, when the guide wheel 11 is arranged laterally, baffles can be provided on both sides of the axial direction to prevent the guide wheel 11 from moving along the support shaft 13. The baffle can be connected to the support shaft 13 by bolts or other fixing methods. When installing the guide wheel 11, the baffle can be removed from the support shaft 13 first, and then the guide wheel 11 can be installed. Then the baffle is installed to prevent the guide wheel 11 from moving along the support shaft 13.

[0036] In this embodiment, a bearing may be provided between the guide wheel 11 and the support shaft 13 to facilitate the rotation of the guide wheel 11.

[0037] In this embodiment, the support shaft 13 is fixedly connected to the bracket 14, and the support shaft 13 does not rotate, so as to ensure that the air intake part 131 is always located at the top of the support shaft 13.

[0038] In this embodiment, when the yarn passes through the yarn guide groove 12, it is located at the top of the yarn guide groove 12, and the air hole 121 is always located at the top of the support shaft 13, so that the air hole 121 corresponding to the part of the yarn guide groove 12 through which the yarn passes is aligned and connected with the air suction part 131, thereby realizing negative pressure pulling on the yarn.

[0039] In this embodiment, when the yarn guide wheel 11 rotates, the air hole 121 at the top position of the yarn guide groove 12 is aligned and connected with the air suction part 131.

[0040] In one optional embodiment, when the yarn passes through the corresponding yarn guide groove 12, the yarn contacts the inner bottom surface of the top part of the yarn guide groove 12. At this time, a pair of air holes 121 located at the top of the yarn guide groove 12 are aligned and connected with the air suction part 131, and the pair of air holes 121 at the top of the yarn guide groove 12 are covered by the yarn. The air suction part 131 draws air in the direction of the axis of the yarn guide wheel 11. The negative pressure pulls the yarn in the yarn guide groove 12 to contact the inner bottom surface of the yarn guide groove 12 near the inner sidewall, so that the yarn contacts the elliptical inner bottom surface of the yarn guide groove 12 evenly.

[0041] In one optional embodiment, the support shaft 13 is hollow, the air intake part 131 is connected to the hollow part, and the hollow part is connected to the air extraction device. The air extraction device is used to extract air so that when the air hole 121 is aligned and connected with the air intake part 131, the air hole 121 is driven to draw air in the direction of the axis of the guide yarn wheel 11.

[0042] In this embodiment, the hollow portion of the support shaft 13 can be connected to an air extraction device via an air pipe or the like.

[0043] like Figure 5 As shown, at least one other disclosed embodiment also provides a weaving system, including: the warp knitting machine yarn guide device for reverse osmosis membrane substrate described above.

[0044] In one alternative embodiment, a warp knitting machine 2 is provided on one side of the yarn guiding device; the warp knitting machine 2 is configured to knit the yarn guided by the yarn guiding device.

[0045] At least one other disclosed embodiment also provides a method of working with the above-described warp knitting machine yarn guiding device for reverse osmosis membrane substrate, comprising: when the yarn passes through the yarn guiding groove 12, the yarn is guided by the rotation of the yarn guiding wheel 11, and at this time, due to the tension force, the yarn is pressed down and makes uniform contact with the inner bottom surface of the elliptical arc.

[0046] In one optional embodiment, when the yarn passes through the corresponding yarn guide groove 12, the yarn contacts the inner bottom surface of the top part of the yarn guide groove 12. At this time, a pair of air holes 121 located at the top of the yarn guide groove 12 are aligned and connected with the air suction part 131, and the pair of air holes 121 at the top of the yarn guide groove 12 are covered by the yarn. The air suction part 131 draws air in the direction of the axis of the yarn guide wheel 11. The negative pressure pulls the yarn in the yarn guide groove 12 to contact the inner bottom surface of the yarn guide groove 12 near the inner sidewall, so that the yarn contacts the elliptical inner bottom surface of the yarn guide groove 12 evenly.

[0047] In one alternative embodiment, air is drawn in by an air extraction device so that when the air hole 121 is aligned and connected with the air intake 131, the air hole 121 is driven to draw air in the direction of the axis of the guide yarn wheel 11.

[0048] In summary, the warp knitting machine yarn guiding device for reverse osmosis membrane substrate guides multiple yarns separately through the yarn guiding mechanism 1. Several yarn guiding grooves 12 are axially formed on the outer wall of the yarn guiding wheel 11. The yarn guiding grooves 12 are annular and arranged circumferentially along the outer wall of the yarn guiding wheel 11. The cross-section of the inner bottom surface of the yarn guiding groove 12 is elliptical, so that when the yarn passes through the yarn guiding groove 12, it is guided by the rotation of the yarn guiding wheel 11. At this time, due to the tension, the yarn is pressed down and makes uniform contact with the inner bottom surface of the elliptical arc. This achieves uniform contact between the yarn and the yarn guiding groove 12 during the yarn guiding process, avoiding excessive friction caused by excessive pressure, preventing yarn wear, and ensuring yarn quality.

[0049] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0050] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0051] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0052] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A warp knitting machine yarn guiding device for reverse osmosis membrane substrate, characterized in that, include: The yarn guiding mechanism (1) is configured to guide multiple yarns separately; The yarn guiding mechanism (1) includes: a plurality of yarn guiding wheels (11); The outer wall of the yarn guide wheel (11) is provided with a plurality of yarn guide grooves (12) along the axial direction. The yarn guide grooves (12) are annular and are arranged along the circumference of the outer wall of the yarn guide wheel (11). The cross-section of the yarn guide groove (12) is elliptical. When the yarn passes through the yarn guide groove (12), the yarn is guided by the rotation of the yarn guide wheel (11). At this time, due to the tension, the yarn is pressed down and comes into uniform contact with the inner bottom surface of the elliptical arc.

2. The warp knitting machine yarn guiding device for reverse osmosis membrane substrate as described in claim 1, characterized in that, The guide wheel (11) has a through hole (111) at its center along the axial direction. The bottom surface of the yarn guide groove (12) is provided with a number of pairs of air holes (121) at equal intervals along the circumference. In each pair of air holes (121), one air hole (121) is set near the inner side wall of the yarn guide groove (12), and the other air hole (121) is set near the other inner side wall of the yarn guide groove (12). All the vents (121) are connected to the through holes (111).

3. The warp knitting machine yarn guiding device for reverse osmosis membrane substrate as described in claim 2, characterized in that, The yarn guiding mechanism (1) further includes: a support shaft (13); The support shaft (13) is mounted on the bracket (14). The support shaft (13) passes through the through holes (111) of each guide wheel (11). The guide wheel (11) and the support shaft (13) are rotatably connected. The outer wall of the support shaft (13) is provided with a strip-shaped air intake (131) along its axial direction. When the support shaft (13) is arranged laterally, the air intake (131) is located at the top of the support shaft (13).

4. The warp knitting machine yarn guiding device for reverse osmosis membrane substrate as described in claim 3, characterized in that, When the yarn passes through the corresponding yarn guide groove (12), the yarn contacts the inner bottom surface of the top part of the yarn guide groove (12). At this time, a pair of air holes (121) located at the top of the yarn guide groove (12) are aligned and connected with the air suction part (131). The pair of air holes (121) at the top of the yarn guide groove (12) are covered by the yarn. The air suction part (131) draws air in the direction of the axis of the yarn guide wheel (11). The negative pressure pulls the yarn in the yarn guide groove (12) to contact the inner bottom surface of the yarn guide groove (12) near the inner side wall, so that the yarn contacts the elliptical inner bottom surface of the yarn guide groove (12) evenly.

5. The warp knitting machine yarn guiding device for reverse osmosis membrane substrate as described in claim 3, characterized in that, The support shaft (13) is hollow, the air intake part (131) is connected to the hollow part, and the hollow part is connected to the air extraction device. The air extraction device is used to extract air so that when the air hole (121) is aligned and connected with the air intake part (131), the air hole (121) is driven to draw air in the direction of the axis of the guide yarn wheel (11).

6. A weaving system, characterized in that, include: The warp knitting machine yarn guiding device for reverse osmosis membrane substrate as described in any one of claims 1-5.

7. The weaving system as claimed in claim 6, characterized in that, A warp knitting machine (2) is installed on one side of the yarn guiding device; The warp knitting machine (2) is configured to knit yarns guided by a yarn guide device.

8. A method of operating a warp knitting machine yarn guiding device for reverse osmosis membrane substrate as described in any one of claims 1-5, characterized in that, include: When the yarn passes through the yarn guide groove (12), the yarn is guided by the rotation of the yarn guide wheel (11). At this time, due to the tension, the yarn is pressed down and comes into uniform contact with the inner bottom surface of the elliptical arc.

9. The working method as described in claim 8, characterized in that, When the yarn passes through the corresponding yarn guide groove (12), the yarn contacts the inner bottom surface of the top part of the yarn guide groove (12). At this time, a pair of air holes (121) located at the top of the yarn guide groove (12) are aligned and connected with the air suction part (131). The pair of air holes (121) at the top of the yarn guide groove (12) are covered by the yarn. The air suction part (131) draws air in the direction of the axis of the yarn guide wheel (11). The negative pressure pulls the yarn in the yarn guide groove (12) to contact the inner bottom surface of the yarn guide groove (12) near the inner side wall, so that the yarn contacts the elliptical inner bottom surface of the yarn guide groove (12) evenly.

10. The working method as described in claim 8, characterized in that, When the air is drawn by the air extraction device, the air hole (121) is aligned and connected with the air intake (131), and the air hole (121) is driven to draw air in the direction of the axis of the guide yarn wheel (11).

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