Self-cleaning yarn guide device

Abstract

The invention discloses a self-cleaning yarn guide device which comprises a T-shaped shell, the shell comprises an upper shell body and a lower shell body, a yarn passing channel allowing yarn to pass through is formed in the center of the upper shell body, and a first optical channel and a second optical channel are formed in the positions, located on the two sides of the yarn passing channel, in the upper shell body respectively. A plane mirror is installed on the side, away from the yarn passing channel, of the first light channel, and a first light emitter and a second light emitter which are obliquely arranged are installed on the two sides of the plane mirror respectively. According to the yarn monitoring device, the photoelectric sensor used for monitoring yarn is formed by arranging the first light emitter, the second light emitter, the plane mirror, the beam combiner and the light receiver, and two light beams emitted by the first light emitter and the second light emitter are combined into one beam, so that the energy of the light beams reflected to the light receiver is improved, and the signal collection intensity is improved; the diameter of the combined light beam is increased, so that the combined light beam can better adapt to the diameters of yarns with different counts, and the situation that textile equipment operates mistakenly due to the fact that the yarns deviate from the light beam due to vibration can be effectively eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of textile machinery, and more specifically to a self-cleaning yarn guiding device. Background Art

[0002] The yarn guide is one of the main working parts of the textile machine, which is used to guide the yarn to be wound on the yarn bobbin to realize the yarn winding process.

[0003] At present, when using a yarn guide, a photoelectric sensor installed on the yarn guide is often used to monitor the yarn breakage or exhaustion, and an alarm installed on the yarn guide is used to give an alarm reminder. Figure 1 As shown in the figure, the yarn count of the rotor mill is generally 7 to 40 yarns. The higher the yarn count, the smaller its diameter, and the maximum difference in diameter can be 2.4 times. Since the installation position and beam size of the photoelectric sensor remain unchanged, when monitoring yarns of different counts, there is a situation where the yarn vibration deviates from the beam and misjudges the yarn breakage; at the same time, natural light and illumination light interfere with the light resistance data of the photoelectric sensor to a certain extent.

[0004] Therefore, it is necessary to propose a new solution to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a self-cleaning yarn guiding device.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A self-cleaning yarn guiding device comprises a T-shaped shell, the shell comprises an upper shell and a lower shell, a yarn passage for yarn to pass through is opened at the center of the upper shell, the end of the yarn passage extends through the lower shell, a first light channel and a second light channel are respectively arranged on both sides of the yarn passage in the upper shell, the first light channel and the second light channel correspond to each other and are connected with the yarn passage, a plane mirror is installed on the side of the first light channel away from the yarn passage, a first light emitter and a second light emitter are respectively installed on both sides of the plane mirror, and the emission ports of the first light emitter and the second light emitter face the plane mirror, a beam combining mirror is installed on the first light channel between the plane mirror and the yarn passage, a light receiver is installed in the second light channel, and the receiving port of the light receiver faces the yarn passage and is connected to the yarn passage. There is a certain distance between the channels, and the light beams emitted simultaneously by the first light emitter and the second light emitter are reflected by the plane mirror and then emitted toward the beam combining mirror along the first light channel, and then are combined by the beam combining mirror and enter the second light channel through the yarn channel, and are received by the light receiver; the lower shell is provided with a first flapping mechanism, a first dust suction mechanism, a second flapping mechanism and a second dust suction mechanism, the first flapping mechanism corresponds to the first dust suction mechanism, and are respectively located on both sides of the yarn passing channel, the second flapping mechanism corresponds to the second dust suction mechanism, and are respectively located on both sides of the yarn passing channel, the second dust suction mechanism and the first flapping mechanism are located on the same side of the yarn passing channel, and the second dust suction mechanism is located below the first flapping mechanism, the second flapping mechanism and the first dust suction mechanism are located on the same side of the yarn passing channel, and the second flapping mechanism is located below the first dust suction mechanism.

[0008] Furthermore, a first mounting block and a second mounting block are respectively installed on both sides of the plane mirror, and the first mounting block and the second mounting block both have an inclined surface, the first light emitter is installed on the inclined surface of the first mounting block, and the second emission tube is installed on the inclined surface of the second mounting block.

[0009] Furthermore, a heating plate is installed at the position of the first mounting block corresponding to the first light emitter and at the position of the second mounting block corresponding to the second light emitter.

[0010] Furthermore, a mounting groove coaxial with the second optical channel is installed in the second optical channel, a limiting ring coaxial with the second optical channel is installed in the mounting groove, the optical receiver is installed in the mounting groove, and the receiving port of the optical receiver abuts against the limiting ring.

[0011] Furthermore, the first beating mechanism and the second beating mechanism have the same structure, including a U-shaped moving frame, which is arranged around the lower shell body, and one end of the moving frame passes through the lower shell body and extends into the yarn passing channel, and one end of the moving frame is connected to a beating plate, and the moving frame of the first beating mechanism and the moving frame of the second beating mechanism move synchronously toward and away from each other repeatedly through a driving mechanism.

[0012] Furthermore, the driving mechanism includes a driving motor installed on the lower shell, a gear is installed on the output end of the driving motor, a rack is installed on the other end of the movable frame corresponding to the gear position, the gear meshes with the rack, and the driving motor drives the two movable frames to move synchronously toward and away from each other repeatedly through the forward and reverse rotation of the gear.

[0013] Furthermore, the first dust suction mechanism and the second dust suction mechanism have the same structure, including a dust suction groove opened in the lower shell and opposite to the flapping plate, both ends of the bottom of the dust suction groove are connected to a dust suction channel, a dust collecting box is installed on the outside of the lower shell, the dust collecting box is connected to the dust suction channel, a fan is installed on the dust collecting box, and the suction end of the fan is connected to the dust collecting box.

[0014] Furthermore, a V-shaped guide plate is installed in the dust suction groove, the two free ends of the guide plate are respectively connected to the inner sides of the two dust suction channel openings, and the fixed end of the guide plate extends to the outside of the dust suction groove.

[0015] The beneficial effects of the present invention are:

[0016] 1. In the present invention, a first light emitter, a second light emitter, a plane mirror, a beam combining mirror and a light receiver are provided to form a photoelectric sensor for monitoring yarn. First, the two light beams emitted by the first light emitter and the second light emitter are combined into one beam to increase the energy of the light beam reflected to the light receiver and increase the signal collection intensity; second, the diameter of the combined light beam is increased, which can better adapt to the diameters of yarns of different counts and effectively eliminate the situation where the textile equipment malfunctions due to the vibration of the yarn deviating from the light beam; third, there is a certain distance between the light receiver and the yarn passing channel, and the light receiver is hidden in the inner cavity of the upper shell. In addition to receiving the combined light beam, natural light and illumination light cannot be received, thereby eliminating the interference of natural light and illumination light and improving the anti-interference ability of the device.

[0017] 2. In the present invention, a heating plate is provided to heat the first light emitter and the second light emitter so that their temperatures are always higher than the external environment temperature and remain constant, so as to avoid the detection signal deviation caused by the temperature change.

[0018] 3. In the present invention, the first beating mechanism and the first dust suction mechanism are combined to form a group of self-cleaning units, and the second beating mechanism and the second dust suction mechanism are combined to form another group of self-cleaning units. The two groups of self-cleaning units are staggered and work in coordination with each other. First, the effect of self-cleaning the yarn passage is achieved. When the first beating mechanism beats the yarn, the first dust suction mechanism and the second dust suction mechanism collect the dust and cotton wool beaten down from the horizontal and longitudinal directions of the yarn at the same time. When the second beating mechanism beats the yarn, the second dust suction mechanism collects part of the dust and cotton wool beaten down, and the other part of the dust and cotton wool falls to the ground from the yarn passage, thereby avoiding the accumulation of dust and cotton wool on the yarn passage; second, the first beating mechanism and the second beating mechanism beat the yarn in opposite directions at the same time to reduce or eliminate the vibration of the yarn, and avoid the yarn vibrating too much and deviating from the light beam, affecting the monitoring; third, by removing dust and cotton wool from the yarn, the situation of malfunction of the textile equipment due to the change of yarn diameter is effectively eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a function diagram of the change of yarn count and diameter size in the rotor mill in the prior art;

[0020] Figure 2 A schematic diagram of the structure of the self-cleaning yarn guide device in this embodiment;

[0021] Figure 3 This is a structural schematic diagram of the self-cleaning yarn guide device in another perspective in this embodiment;

[0022] Figure 4 Schematic diagram of a connection structure between mobile racks in this embodiment;

[0023] Figure 5 This is a schematic diagram of a top view of the lower housing in this embodiment;

[0024] Figure 6 This is a diagram of a use state of the first beating mechanism and the first dust suction mechanism in this embodiment;

[0025] Figure 7 Schematic diagram of the structure of the upper shell in this embodiment.

[0026] Figure numerals: upper shell 1, lower shell 2, yarn passing channel 3, first optical channel 4, second optical channel 5, plane mirror 6, first optical transmitter 7, second optical transmitter 8, beam combining mirror 9, optical receiver 10, first flapping mechanism 11, first dust suction mechanism 12, second flapping mechanism 13, second dust suction mechanism 14, first mounting block 15, second mounting block 16, heating plate 17, mounting groove 18, limiting ring 19, driving mechanism 20, driving motor 2001, gear 2002, moving frame 21, flapping plate 22, rack 23, limiting frame 24, dust suction groove 25, dust suction channel 26, dust collecting box 27, fan 28, guide plate 29. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment: A self-cleaning yarn guide device, such as Figure 2-Figure 7 As shown, it includes a T-shaped shell, the shell includes an upper shell 1 and a lower shell 2, the upper shell 1 is located above the lower shell 2 and is connected to the lower shell 2, a yarn passage 3 for the yarn to pass through is opened at the center of the upper shell 1, the end of the yarn passage 3 extends through the lower shell 2, and a first light channel 4 and a second light channel 5 for the light beam to pass through are respectively provided on both sides of the yarn passage 3 in the upper shell 1, the first light channel 4 and the second light channel 5 correspond to each other and are connected to the yarn passage 3, that is, the light beam in the first light channel 4 can be projected to the second light channel 5 through the yarn channel 3.

[0029] like Figure 7 As shown, a plane mirror 6 is installed on the side of the first light channel 4 away from the yarn channel 3, and a first light emitter 7 and a second light emitter 8 are installed on both sides of the plane mirror 6, and the emission ports of the first light emitter 7 and the second light emitter 8 are both facing the plane mirror 6; wherein the first light emitter 7 and the second light emitter 8 are used to simultaneously emit light beams to the plane mirror 6, and the plane mirror 6 is used to reflect the light beams emitted by the first light emitter 7 and the second light emitter 8 into the first light channel 4, and emit them into the second light channel 5 through the yarn channel 3.

[0030] Furthermore, a beam combiner 9 is installed in the first optical channel 4, and the beam combiner 9 is located between the plane mirror 6 and the yarn passage 3. A light receiver 10 is installed in the second optical channel 5, and the receiving port of the light receiver 10 faces the yarn passage 3 and has a certain distance from the yarn passage 3.

[0031] When in use, the first light emitter 7 and the second light emitter 8 simultaneously emit light beams to the plane mirror 6, and the plane mirror 6 reflects the two light beams along the first optical channel 4 to the beam combining mirror 9. The beam combining mirror 9 combines the two light beams reflected by the plane mirror 6 into one beam, which is then emitted to the second optical channel 5 through the yarn channel 3 and received by the light receiver 10 in the second optical channel 5.

[0032] By setting a first light emitter 7, a second light emitter 8, a plane mirror 6, a beam combining mirror 9 and a light receiver 10, a photoelectric sensor for monitoring yarn is formed. First, the two light beams emitted by the first light emitter 7 and the second light emitter 8 are combined into one beam to increase the energy of the light beam reflected to the light receiver 10 and increase the signal collection intensity; second, the diameter of the combined light beam is increased, which can better adapt to the diameters of yarns of different counts and effectively eliminate the situation where the textile equipment malfunctions due to the vibration of the yarn deviating from the light beam; third, there is a certain distance between the light receiver 10 and the yarn passing channel 3, and the light receiver 10 is hidden in the inner cavity of the upper shell 1. In addition to receiving the combined light beam, natural light and illumination light cannot be received, thereby eliminating the interference of natural light and illumination light and improving the anti-interference ability of the device.

[0033] Preferably, a first mounting block 15 and a second mounting block 16 are respectively mounted on both sides of the plane mirror 6, and the first mounting block 15 and the second mounting block 16 both have an inclined surface, the first light emitter 7 is mounted on the inclined surface of the first mounting block 15, and the second light emitter 8 is mounted on the inclined surface of the second mounting block 16. The first mounting block 15 and the second mounting block 16 are carriers for mounting the first light emitter 7 and the second light emitter 8, and the first light emitter 7 and the second light emitter 8 are installed at an angle by using their inclined surfaces, so that the first light emitter 7 and the second light emitter 8 emit light beams at an angle toward the plane mirror 6.

[0034] Preferably, a heating plate 17 is installed at the position of the first light emitter 7 corresponding to the first mounting block 15 and at the position of the second light emitter 8 corresponding to the second mounting block 16. By setting the heating plate 17, the first light emitter 7 and the second light emitter 8 are heated so that their temperatures are always higher than the external environment temperature and remain unchanged, that is, no matter how the external working environment temperature changes in spring, summer, autumn and winter, it will not affect the temperature of the first light emitter 7 and the second light emitter 8, so as to ensure the consistency of the nonlinear characteristics and electrical characteristics of the first light emitter 7 and the second light emitter 8, and avoid the deviation of the detection signal caused by the temperature change of itself.

[0035] Preferably, a mounting groove 18 coaxial with the second optical channel 5 is installed in the second optical channel 5, and a limiting ring 19 coaxial with the second optical channel 5 is installed in the mounting groove 18. When the optical receiver 10 is installed in the mounting groove 18, its receiving port abuts against the limiting ring 19. The limiting ring 19 is provided to ensure the distance between the optical receiver 10 and the yarn passing channel 3.

[0036] Further, such as Figure 2 and Figure 3 As shown, the lower shell 2 is provided with a first flapping mechanism 11, a first dust suction mechanism 12, a second flapping mechanism 13 and a second dust suction mechanism 14, the first flapping mechanism 11 corresponds to the first dust suction mechanism 12, and is respectively located on both sides of the yarn passing channel 3, the second flapping mechanism 13 and the second dust suction mechanism 14 correspond to each other, and are respectively located on both sides of the yarn passing channel 3, the second dust suction mechanism 14 and the first flapping mechanism 11 are located on the same side of the yarn passing channel 3, and the second dust suction mechanism 14 is located below the first flapping mechanism 11, the second flapping mechanism 13 and the first dust suction mechanism 12 are located on the same side of the yarn passing channel 3, and the second flapping mechanism 13 is located below the first dust suction mechanism 12.

[0037] Among them, the first beating mechanism 11 and the second beating mechanism 13 are used to beat the yarn to remove dust and cotton wool attached to the yarn to ensure the cleanliness of the yarn; the first dust suction mechanism 12 and the second dust suction mechanism 14 are used to collect dust and cotton wool fallen from the yarn to prevent dust and cotton wool from accumulating at the channel opening of the yarn channel 3.

[0038] The first beating mechanism 11 and the first dust suction mechanism 12 are combined to form a group of self-cleaning units, and the second beating mechanism 13 and the second dust suction mechanism 14 are combined to form another group of self-cleaning units. The two groups of self-cleaning units are staggered and work in coordination. First, the effect of self-cleaning the yarn passage 3 is achieved. For example, when the first beating mechanism 11 beats the yarn, the first dust suction mechanism 12 and the second dust suction mechanism 14 collect the dust and cotton wool beaten down from the lateral and longitudinal directions of the yarn at the same time. When the second beating mechanism 13 beats the yarn, the second dust suction mechanism 14 collects part of the dust and cotton wool beaten down, and the other part of the dust and cotton wool falls from the yarn passage 3 to the ground, thereby avoiding the accumulation of dust and cotton wool on the yarn passage 3; second, the first beating mechanism 11 and the second beating mechanism 13 beat the yarn in opposite directions at the same time to reduce or eliminate the vibration of the yarn, and avoid the yarn from vibrating too much and deviating from the light beam, affecting the monitoring; third, by removing dust and cotton wool from the yarn, the situation of malfunction of the textile equipment due to the change of yarn diameter is effectively eliminated.

[0039] Further, such as Figure 5 and Figure 6 As shown, the first beating mechanism 11 and the second beating mechanism 13 have the same structure, including a U-shaped moving frame 21, which is arranged around the lower shell 2, and one end of the moving frame 21 passes through the lower shell 2 and extends into the yarn passage 3, and one end of the moving frame 21 is connected to a beating plate 22, which is used to beat the yarn.

[0040] The moving frame 21 in the first beating mechanism 11 and the moving frame 21 in the second beating mechanism 13 are synchronously moved toward and away from each other repeatedly through the driving mechanism 20. Specifically, the driving mechanism 20 includes a driving motor 2001 installed on the lower shell 2, and a gear 2002 is installed at the output end of the driving motor 2001. A rack 23 is installed at the other end of the moving frame 21 corresponding to the position of the gear 2002, and the gear 2002 meshes with the rack 23; when in use, the driving motor 2001 drives the gear 2002 to rotate forward and reverse, so that the two moving frames 21 synchronously move toward and away from each other repeatedly, such as driving the gear 2002 forward to rotate by an angle N, so that the two moving frames 21 synchronously move toward each other, so that the beating plate 22 beats both sides of the yarn, and then drives the gear 2002 to reverse by an angle N, so that the two moving frames 21 synchronously move away from each other, so that the beating plate 22 is away from the yarn, and the cycle repeats, N < 180°.

[0041] Preferably, the other end of the mobile frame 21 is sleeved with a limit frame 24, which is U-shaped and mounted on the lower shell 2, that is, the two free ends of the limit frame 24 are fixedly connected to the lower shell 2. The limit frame 24 is provided to limit the moving direction of the mobile frame 21.

[0042] The first dust suction mechanism 12 and the second dust suction mechanism 14 have the same structure, including a dust suction groove 25 opened in the lower shell body 2 and corresponding to the flapping plate 22, the groove opening of the dust suction groove 25 is open, and its groove wall and groove bottom are closed, and both ends of the groove bottom of the dust suction groove 25 are connected to a dust suction channel 26, and two dust suction channels 26 are provided, and are symmetrically arranged with each other, a dust collecting box 27 is installed on the outer side of the lower shell body 2, and the dust collecting box 27 is connected to the dust suction channel 26, and a fan 28 is installed on the dust collecting box 27, and the suction end of the fan 28 is connected to the dust collecting box 27, and the exhaust end of the fan 28 is connected to the external working environment.

[0043] When in use, the fan 28 discharges the air in the dust box 27 to the external working environment through the exhaust end of the fan 28, so that negative pressure is generated in the dust box 27. The dust and cotton wool that are beaten down are sucked into the dust suction channel 26 through the dust suction groove 25 by the negative pressure, and transferred to the dust box 27 along the dust suction channel 26. The dust box 27 plays a role of collecting for subsequent unified treatment. By arranging two dust suction channels 26 at both ends of the bottom of the dust suction groove 25, the dust suction range is increased and the dust suction effect is improved.

[0044] Further, such as Figure 6 As shown, a V-shaped guide plate 29 is installed in the dust suction groove 25. The guide plate 29 has a fixed end and two free ends. The two free ends of the guide plate 29 are respectively connected to the inner sides of the channel openings of the two dust suction channels 26. The fixed end of the guide plate 29 extends to the outside of the dust suction groove 25 and toward the flapping plate 22.

[0045] By installing a V-shaped guide plate 29 in the dust suction groove 25, on the one hand, it plays a partitioning effect to prevent the negative pressure airflows between the two dust suction channels 26 from interfering with each other and affecting the dust removal effect. On the other hand, the fixed end of the guide plate 29 extends outside the dust suction groove 25, playing a guiding effect, guiding the dust and cotton wool that have been beaten down along the guide plate 29 into the dust suction channel 26.

[0046] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A self-cleaning yarn guide device, comprising a T-shaped housing, characterized in that: The shell comprises an upper shell (1) and a lower shell (2); a yarn passage (3) for yarn to pass through is provided at the center of the upper shell (1); an end of the yarn passage (3) extends through the lower shell (2); a first light passage (4) and a second light passage (5) are provided on both sides of the yarn passage (3) in the upper shell (1); the first light passage (4) and the second light passage (5) correspond to each other and are connected to the yarn passage (3); a plane mirror (6) is installed on the side of the first light passage (4) away from the yarn passage (3) A first light emitter (7) and a second light emitter (8) are installed on both sides of the plane mirror (6), and the emission ports of the first light emitter (7) and the second light emitter (8) face the plane mirror (6). A beam combining mirror (9) is installed in the first light channel (4) between the plane mirror (6) and the yarn passage channel (3). A light receiver (10) is installed in the second light channel (5). The receiving port of the light receiver (10) faces the yarn passage channel (3) and is at a certain distance from the yarn passage channel (3). The light beams emitted simultaneously by the first light emitter (7) and the second light emitter (8) are reflected by the plane mirror (6) and emitted along the first light channel (4) to the beam combining mirror (9). After being combined by the beam combining mirror (9), the light beams enter the second light channel (5) through the yarn channel (3) and are received by the light receiver (10); the lower shell (2) is provided with a first beating mechanism (11), a first dust suction mechanism (12), a second beating mechanism (13) and a second dust suction mechanism (14); the first beating mechanism (11) and the first dust suction mechanism (12) correspond to each other and are respectively located On both sides of the yarn passing passage (3), the second beating mechanism (13) and the second dust suction mechanism (14) correspond to each other and are respectively located on both sides of the yarn passing passage (3); the second dust suction mechanism (14) and the first beating mechanism (11) are located on the same side of the yarn passing passage (3), and the second dust suction mechanism (14) is located below the first beating mechanism (11); the second beating mechanism (13) and the first dust suction mechanism (12) are located on the same side of the yarn passing passage (3), and the second beating mechanism (13) is located below the first dust suction mechanism (12).

2. A self-cleaning yarn guiding device according to claim 1, characterized in that: A first mounting block (15) and a second mounting block (16) are respectively mounted on both sides of the plane mirror (6); the first mounting block (15) and the second mounting block (16) both have an inclined surface; the first light emitter (7) is mounted on the inclined surface of the first mounting block (15); and the second emission tube is mounted on the inclined surface of the second mounting block (16).

3. A self-cleaning yarn guiding device according to claim 2, characterized in that: A heating plate (17) is installed at the position of the first mounting block (15) corresponding to the first light emitter (7), and a heating plate (17) is installed at the position of the second mounting block (16) corresponding to the second light emitter (8).

4. A self-cleaning yarn guiding device according to claim 1, characterized in that: A mounting groove (18) coaxial with the second optical channel (5) is installed in the second optical channel (5), a limiting ring (19) coaxial with the second optical channel (5) is installed in the mounting groove (18), the optical receiver (10) is installed in the mounting groove (18), and the receiving port of the optical receiver (10) abuts against the limiting ring (19).

5. A self-cleaning yarn guiding device according to claim 1, characterized in that: The first beating mechanism (11) and the second beating mechanism (13) have the same structure, comprising a U-shaped moving frame (21), the moving frame (21) being arranged around the lower shell (2), one end of the moving frame (21) passing through the lower shell (2) and extending into the yarn passage (3), one end of the moving frame (21) being connected to a beating plate (22), and the moving frame (21) of the first beating mechanism (11) and the moving frame (21) of the second beating mechanism (13) being synchronously moved towards and away from each other repeatedly through a driving mechanism (20).

6. A self-cleaning yarn guiding device according to claim 5, characterized in that: The driving mechanism (20) comprises a driving motor (2001) mounted on the lower housing (2); a gear (2002) is mounted on the output end of the driving motor (2001); a rack (23) is mounted on the other end of the moving frame (21) at a position corresponding to the gear (2002); the gear (2002) meshes with the rack (23); and the driving motor (2001) drives the two moving frames (21) to move synchronously toward and away from each other repeatedly in forward and reverse rotation via the gear (2002).

7. A self-cleaning yarn guiding device according to claim 5, characterized in that: The first dust suction mechanism (12) and the second dust suction mechanism (14) have the same structure, comprising a dust suction groove (25) opened in the lower shell (2) and opposite to the flapping plate (22), both ends of the bottom of the dust suction groove (25) are connected to a dust suction channel (26), a dust collecting box (27) is installed on the outer side of the lower shell (2), the dust collecting box (27) is connected to the dust suction channel (26), a fan (28) is installed on the dust collecting box (27), and the air suction end of the fan (28) is connected to the dust collecting box (27).

8. A self-cleaning yarn guiding device according to claim 7, characterized in that: A V-shaped guide plate (29) is installed in the dust suction groove (25), the two free ends of the guide plate (29) are respectively connected to the inner sides of the channel openings of the two dust suction channels (26), and the fixed end of the guide plate (29) extends outside the dust suction groove (25).

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