A drafting device for linen spinning frame

Abstract

The present invention relates to the technical field of spinning frames, and specifically to a drafting device for a linen spinning frame, comprising an apron, a feed roller is provided on the upper side of the apron, and a front roller is provided on the lower side of the apron, the rotational speed of the front roller is higher than the rotational speed of the feed roller, and the yarn passes through the feed roller and the apron in sequence and moves toward the front roller; the drafting device for the linen spinning frame of the present invention can achieve unified drive while independently controlling the corresponding feed roller to stop rotating when a thread breakage problem occurs, thereby avoiding the problem of yarn accumulation and entanglement caused by the continued operation of the feed roller, making the equipment easier to maintain during use.

Description

Technical Field

[0001] The invention relates to the technical field of spinning frames, in particular to a drafting device for a linen spinning frame. Background Art

[0002] The linen spinning frame is a textile equipment consisting of multiple drafting devices, which can draft fiber raw materials in the form of roving. The fibers of roving are usually not tightly arranged and are relatively loose. Through the drafting system composed of rollers, aprons and other components, the different rotation speeds of each roller are used to gradually lengthen and thin the fiber bundles. The diameter of the fed roving may be several millimeters. After a series of drafting, it can eventually become a spun yarn with a diameter of only a few tenths of a millimeter. The drafting device is composed of rollers, aprons and other structures. In a spinning frame, dozens of drafting devices are usually arranged side by side. In the existing technology, in order to reduce equipment costs, the rollers in the drafting device are usually driven by a whole shaft that passes through the spinning frame to synchronously drive the rollers in dozens of drafting devices.

[0003] However, in actual use, if a yarn breaks during the drafting process, since the feed rollers are also synchronously driven by a single shaft, it is impossible to shut down the entire equipment due to a partial break. In this case, the feed rollers continue to operate and continue to feed yarn into the drafting device, causing yarn accumulation. This requires manual detection and treatment, which requires high staff intensity. Furthermore, it is costly to have separate drive motors for the rollers in dozens of drafting devices. Summary of the Invention

[0004] The object of the present invention is to provide a drafting device for a linen spinning frame to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a drafting device for a linen spinning frame, comprising an apron, a feed roller is provided on the upper side of the apron, and a front roller is provided on the lower side of the apron, the rotation speed of the front roller is higher than the rotation speed of the feed roller, and the yarn passes through the feed roller and the apron in sequence and moves toward the front roller, and the feed roller is tubular and has a feed control shaft inserted therein, and the feed roller is driven to rotate by the feed control shaft;

[0006] The surface of the feeding control shaft is provided with an annular rotating cover, and the feeding control shaft and the annular rotating cover can rotate relative to each other. A control air pipe is provided on the outside of the annular rotating cover. A bottom suspension is provided below the feeding roller, and an accommodating groove is provided on the upper surface of the bottom suspension. A corrugated rubber pressure bag is provided in the accommodating groove, and a gas cavity is provided in the bottom suspension. The control air pipe is connected with the corrugated rubber pressure bag through the gas cavity. An unlocking component with a cooling function is provided inside and outside the feeding control shaft. When positive pressure airflow is filled into the control air pipe, the above-mentioned unlocking component is activated, so that the feeding roller and the feeding control shaft can rotate relative to each other; a detection sensor is installed between the leather ring and the front roller, and the detection sensor is used to detect the continuity of the yarn. When the detection sensor detects that the yarn is broken, the external air source is controlled to fill the control air pipe with positive pressure airflow.

[0007] The unlocking component includes inner wall mating teeth, a control shaft cavity and a telescopic slot window. The inner wall surface of the feed roller is fixedly provided with inner wall mating teeth, and the inner wall mating teeth are evenly distributed in a circular array. A control shaft cavity is opened inside the feed control shaft, and a telescopic slot window is opened through the inner wall surface of the control shaft cavity. A movable clamping plate is inserted in the telescopic slot window. The movable clamping plate corresponds to the position of the inner wall mating teeth. The movable clamping plate is inserted between the inner wall mating teeth for limiting, so that when the feed control shaft rotates, it can drive the feed roller to rotate synchronously.

[0008] An internal parallel plate is provided inside the control shaft cavity, and the internal parallel plate is fixedly installed with the movable clamping plate. A limiting through hole is provided through the surface of the internal parallel plate, and a limiting vertical shaft is inserted in the limiting through hole. Both ends of the limiting vertical shaft are fixed to the inner wall surface of the control shaft cavity.

[0009] A separation support spring is provided on the outside of the internal parallel plate, and the separation support spring applies elastic pressure to the internal parallel plate, so that the movable clamping plate has an elastic tendency to move toward the inner wall matching tooth. An inclined guide strip is fixedly provided on the surface of the internal parallel plate.

[0010] The end of the control shaft cavity is connected to an axial air cavity, in which a piston body is arranged. The piston body is in sealing contact with the axial air cavity, and a polymer pressure tube is fixedly arranged on the surface of the piston body. When the polymer pressure tube moves axially toward the inclined guide bar, the movable clamping plate can be retracted toward the interior of the control shaft cavity by squeezing the inclined guide bar.

[0011] An annular limiting eaves is fixedly provided on the inner wall of the axial air cavity, and a piston return spring is provided between the annular limiting eaves and the piston body, and the piston return spring applies an elastic thrust to the piston body to move in the direction away from the inclined guide bar. A secondary communicating air path is opened inside the feeding control shaft, one end of the secondary communicating air path is connected with the axial air cavity, and the other end of the secondary communicating air path is connected with the outer surface of the feeding control shaft and corresponds to the position of the feeding roller; when the piston body is driven by air pressure through the connecting port between the secondary communicating air path and the axial air cavity, the gas enters the secondary communicating air path again.

[0012] An annular outer groove is provided on the surface of the feeding control shaft, and the annular outer groove is an annular groove. The annular rotating cover is located inside the annular outer groove, and the annular rotating cover is in airtight contact with the annular outer groove. An input air path is provided inside the feeding control shaft, and the annular outer groove is connected to the axial air cavity through the input air path.

[0013] Side support plates are symmetrically arranged on both sides of the leather ring, and a support roller and a drive roller are installed between the two groups of side support plates. The leather ring is supported by the support roller and the drive roller, and the leather ring is driven to rotate by the drive roller.

[0014] A matching roller is provided on the outside of the feeding roller, and the feeding roller and the matching roller cooperate to clamp the yarn. A lifting movable bracket is provided in the matching roller, and the lifting movable bracket is installed with the lifting module of the spinning frame, and is used to drive the matching roller to move up and down relative to the feeding roller. A rubber pressure roller is provided on the outside of the front roller, and the front roller and the rubber pressure roller cooperate to clamp the yarn.

[0015] A bearing is installed between the feeding roller and the feeding control shaft. Limiting side rings are symmetrically arranged on both sides of the feeding roller, and the limiting side rings are fixedly installed on the feeding control shaft.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The drafting device for the linen spinning frame of the present invention can achieve unified drive and, when a thread breakage problem occurs, can independently control the corresponding feed roller to stop rotating, thereby preventing the feed roller from continuing to run and causing the yarn to accumulate and entangle, making the equipment easier to maintain during use.

[0018] The present invention cooperates with structures such as the bottom suspension, the corrugated rubber pressure bag and the control air pipe, and can contact and lock the feeding roller when the feeding roller stops, so as to prevent the rotational inertia of the feeding roller from causing further feeding and accumulation of the yarn. At the same time, the broken yarn will not be pulled by the reverse tension and will withdraw from between the feeding roller and the matching roller, which makes it easy to determine the broken yarn position and facilitate twisting connection. The flexible contact of the corrugated rubber pressure bag can avoid scratching the feeding roller.

[0019] The unlocking component of the present invention can, after the feed roller and the feed control shaft are unlocked, spray air between the feed roller and the feed control shaft when the feed control shaft rotates at a high speed relative to the feed roller, so that the air flow carries away the heat generated by the high-speed rotation friction of structures such as the bearings, while extending the life of the bearings. It can ensure that the feed roller will not be heated by conduction, thereby avoiding the feed roller heating up after connection and affecting the yarn drafting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the overall structure of the present invention from another angle.

[0022] Figure 3 It is a three-dimensional half-section schematic diagram of the feeding roller of the present invention.

[0023] Figure 4 for Figure 3 Enlarged schematic diagram of area A in the middle.

[0024] Figure 5 This is a three-dimensional half-section front view of the feeding roller of the present invention.

[0025] Figure 6 for Figure 5 Enlarged schematic diagram of area B in the middle.

[0026] Figure 7 It is a half-section schematic diagram of the feeding roller of the present invention.

[0027] Figure 8 for Figure 7 Enlarged schematic diagram of area C in the middle.

[0028] Figure 9 It is a schematic diagram of the structure of parts of the present invention.

[0029] Figure: 1, leather ring; 2, feeding roller; 3, front roller; 4, feeding control shaft; 5, annular rotating cover; 6, control air pipe; 7, bottom suspension; 8, accommodating groove; 9, corrugated rubber pressure bag; 10, gas cavity; 11, detection sensor; 401, inner wall matching teeth; 402, control shaft cavity; 403, telescopic slot window; 404, movable clamping plate; 405, internal parallel plate; 406, limit through hole; 407, limit vertical shaft; 408, separation support spring Spring; 409, inclined guide strip; 410, axial air cavity; 411, piston body; 412, polymer pressure tube; 413, annular limit eaves; 414, piston return spring; 415, secondary connecting air path; 416, annular outer groove; 417, input air path; 101, side support plate; 102, support roller; 103, drive roller; 201, matching roller; 202, lifting movable bracket; 203, bearing; 204, limit side ring; 301, rubber pressure roller. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0031] See also Figures 1 to 9 The present invention provides a technical solution: a drafting device for a linen spinning frame, such as Figure 1As shown in the figure, it includes an apron 1, which is made of rubber. A feeding roller 2 is provided on the upper side of the apron 1, and a front roller 3 is provided on the lower side of the apron 1. The rotation speed of the front roller 3 is higher than that of the feeding roller 2. The yarn passes through the feeding roller 2 and the apron 1 in sequence and moves toward the front roller 3. The feeding roller 2 is tubular and is provided with a feeding control shaft 4 inserted inside. The feeding roller 2 is driven to rotate by the feeding control shaft 4; an annular rotating cover 5 is provided on the surface of the feeding control shaft 4, and the feeding control shaft 4 and the annular rotating cover 5 can rotate relative to each other. A control air pipe 6 is provided on the outside of the annular rotating cover 5; a bottom suspension 7 is provided below the feeding roller 2, and the upper surface of the bottom suspension 7 is provided with a accommodating The groove 8 houses a corrugated rubber pressure bag 9. A gas cavity 10 is provided in the bottom platform 7, connecting the control air pipe 6 to the corrugated rubber pressure bag 9 via the gas cavity 10. Cooling unlocking components are installed inside and outside the feed control shaft 4. When positive pressure is introduced into the control air pipe 6, the unlocking components activate, allowing the feed roller 2 and the feed control shaft 4 to rotate relative to each other. A detection sensor 11 is installed between the apron 1 and the front roller 3. This sensor 11 can be a capacitive sensor capable of detecting non-metallic structures. When the yarn breaks, the front roller 3 continues to pull the yarn, causing it to move away from the detection sensor 11, thereby detecting the yarn break. If cost is not a concern, a photoelectric sensor or visual sensor can also be used, which offers higher accuracy. When the detection sensor 11 detects a yarn break, it controls an external air source to inject positive pressure into the control air pipe 6. In actual operation, the control air pipe 6 is connected to an external compressed gas cylinder or air compressor via a solenoid valve.

[0032] The unlocking component includes an inner wall mating tooth 401, a control shaft cavity 402 and a telescopic slot window 403. The inner wall surface of the feed roller 2 is fixedly provided with an inner wall mating tooth 401, and the inner wall mating teeth 401 are evenly distributed in a circular array. A control shaft cavity 402 is opened inside the feed control shaft 4, and a telescopic slot window 403 is opened on the inner wall surface of the control shaft cavity 402. A movable clamping plate 404 is inserted in the telescopic slot window 403. The movable clamping plate 404 corresponds to the position of the inner wall mating tooth 401. The movable clamping plate 404 is inserted between the inner wall mating teeth 401 for limiting the position, so that when the feed control shaft 4 rotates, it can drive the feed roller 2 to rotate synchronously.

[0033] An internal parallel plate 405 is disposed within the control shaft cavity 402 and is fixedly mounted to the movable clamping plate 404. A limit hole 406 is formed through the surface of the internal parallel plate 405, and a limit vertical shaft 407 is inserted through the limit hole 406. Both ends of the limit vertical shaft 407 are fixed to the inner wall surface of the control shaft cavity 402. A separation support spring 408 is disposed on the exterior of the internal parallel plate 405. The separation support spring 408 applies elastic pressure to the internal parallel plate 405, causing the movable clamping plate 404 to have an elastic tendency to move toward the inner wall mating teeth 401. An inclined guide strip 409 is fixedly disposed on the surface of the internal parallel plate 405.

[0034] The end of the control shaft cavity 402 is connected to an axial air cavity 410, in which a piston body 411 is provided. The piston body 411 is in sealing contact with the axial air cavity 410, and a polymer pressure tube 412 is fixedly provided on the surface of the piston body 411. When the polymer pressure tube 412 moves axially toward the inclined guide bar 409, the movable clamping plate 404 can be retracted toward the interior of the control shaft cavity 402 by squeezing the inclined guide bar 409.

[0035] An annular limiting eaves 413 is fixedly provided on the inner wall of the axial air cavity 410, and a piston return spring 414 is provided between the annular limiting eaves 413 and the piston body 411. The piston return spring 414 applies an elastic thrust to the piston body 411 to move in the direction away from the inclined guide bar 409. A secondary communicating air path 415 is opened inside the feed control shaft 4, and one end of the secondary communicating air path 415 is connected with the axial air cavity 410, and the other end of the secondary communicating air path 415 is connected with the outer surface of the feed control shaft 4 and corresponds to the position of the feed roller 2; when the piston body 411 is driven by air pressure through the connecting port between the secondary communicating air path 415 and the axial air cavity 410, the gas enters the secondary communicating air path 415 again.

[0036] An annular outer groove 416 is provided on the surface of the feed control shaft 4. The annular outer groove 416 is an annular groove. The annular rotating cover 5 is located inside the annular outer groove 416. The annular rotating cover 5 is in airtight contact with the annular outer groove 416. An input air path 417 is provided inside the feed control shaft 4. The annular outer groove 416 is connected to the axial air cavity 410 through the input air path 417.

[0037] Side support plates 101 are symmetrically arranged on both sides of the leather ring 1. A support roller 102 and a drive roller 103 are installed between the two sets of side support plates 101. The leather ring 1 is supported by the support roller 102 and the drive roller 103, and the leather ring 1 is driven to rotate by the drive roller 103.

[0038] A matching roller 201 is provided on the outside of the feeding roller 2, and the feeding roller 2 and the matching roller 201 cooperate to clamp the yarn. A lifting movable bracket 202 is provided in the matching roller 201, and the lifting movable bracket 202 is installed with the lifting module of the spinning frame. The lifting module is a spring pressing structure or a cylinder structure in the prior art, which is used to drive the matching roller 201 to move up and down relative to the feeding roller 2. A rubber pressure roller 301 is provided on the outside of the front roller 3, and the front roller 3 cooperates with the rubber pressure roller 301 to clamp the yarn.

[0039] A bearing 203 is installed between the feeding roller 2 and the feeding control shaft 4. Limiting side rings 204 are symmetrically arranged on both sides of the feeding roller 2. The limiting side rings 204 are fixedly installed on the feeding control shaft 4. There is a gap between the limiting side rings 204 and the feeding roller 2 for gas discharge.

[0040] The drafting device for the flax spinning frame of the present invention is usually arranged in parallel with dozens of drafting devices in actual work. The shafts in the feed control shaft 4, the drive roller shaft 103 and the front roller 3 are all long axes that cross the spinning frame. The present invention is cut off and displayed in the figure, as shown in FIG. Figure 1 As shown in the figure, the yarn is clamped by the feeding roller 2 and the matching roller 201, and the yarn is clamped by the front roller 3 and the rubber pressure roller 301. The external yarn is fed into the drafting device by the rotation of the feeding roller 2, and the yarn passes through the leather ring 1 and is then stretched and pulled out by the front roller 3. The rotation speed of the front roller 3 is higher than that of the feeding roller 2, so that the yarn is continuously stretched while passing through the leather ring 1. The function of the leather ring 1 is to increase the control ability of the floating fibers, so that the fibers can change speed more evenly during the drafting process, reduce the loss and disorder of the fibers, and thus improve the uniformity and strength of the yarn.

[0041] In the above process, the detection sensor 11 continuously detects the yarn, and when it detects that the yarn is broken, it injects positive pressure air into the control air pipe 6 through the external air source. Figure 4 As shown in the figure, the air flow in the control air pipe 6 enters the axial air cavity 410 through the annular rotating cover 5 and the input air path 417, driving the piston body 411 to move axially to the left. At this time, the polymer pressure pipe 412 squeezes the inclined guide bar 409, so that the movable clamping plate 404 moves out from the inner wall matching tooth 401, and the feeding roller 2 and the feeding control shaft 4 are unlocked and can rotate relative to each other. At the same time, the air flow in the control air pipe 6 is diverted to the gas cavity path 10 and enters the corrugated rubber pressure bag 9, so that the corrugated rubber pressure bag 9 bulges and frictionally contacts the feeding roller 2, so that the feeding roller 2 immediately stops and locks to avoid further feeding and accumulation of yarn due to rotational inertia. At this time, since the feeding roller 2 is locked by the corrugated rubber pressure bag 9, when the yarn is pulled in the opposite direction by external force, the broken yarn will not exit between the feeding roller 2 and the matching roller 201, which is convenient for determining the broken yarn position.

[0042] like Figure 4 As shown in , after the piston body 411 moves to the left, the piston body 411 will pass through the connecting port between the secondary connecting air path 415 and the axial air cavity 410. At this time, the air flow in the axial air cavity 410 will enter the secondary connecting air path 415, and be ejected through the secondary connecting air path 415 to between the feeding roller 2 and the feeding control shaft 4, to dissipate heat to the bearing 203, to avoid the feeding roller 2 from heating up, and to affect the yarn drafting quality after connection. The temperature increase of the feeding roller 2 will make the fiber molecular segments in the passing yarn more active, and the rigidity of the fiber will be reduced and the softness will be increased. During the drafting process, the fiber movement will be uneven, and the yarn evenness will be worse.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A drafting device for a linen spinning frame, comprising an apron (1), wherein a feed roller (2) is provided on the upper side of the apron (1), and a front roller (3) is provided on the lower side of the apron (1), wherein the rotation speed of the front roller (3) is higher than the rotation speed of the feed roller (2), and the yarn moves toward the front roller (3) through the feed roller (2) and the apron (1) in sequence, and is characterized in that: The feeding roller (2) is tubular, and a feeding control shaft (4) is inserted into the inside, and the feeding roller (2) is driven to rotate by the feeding control shaft (4); The surface of the feeding control shaft (4) is provided with an annular rotating cover (5), and the feeding control shaft (4) and the annular rotating cover (5) can rotate relative to each other. The external communication of the annular rotating cover (5) is provided with a control air pipe (6), and a bottom suspension (7) is provided below the feeding roller (2). The upper surface of the bottom suspension (7) is provided with a receiving groove (8), and a corrugated rubber pressure bag (9) is provided in the receiving groove (8). The bottom suspension (7) is provided with a gas cavity (10), and the control air pipe (6) is connected to the corrugated rubber pressure bag (9) through the gas cavity (10). The feeding control shaft (4) is connected to the rubber pressure bag (9), and the inside and outside of the feeding control shaft (4) are provided with an unlocking component with a cooling function. When the control air pipe (6) is filled with a positive pressure airflow, the unlocking component is actuated, so that the feeding roller (2) and the feeding control shaft (4) can rotate relative to each other; a detection sensor (11) is installed between the leather ring (1) and the front roller (3), and the detection sensor (11) is used to detect the continuity of the yarn. When the detection sensor (11) detects that the yarn is disconnected, it controls the external air source to fill the control air pipe (6) with a positive pressure airflow; The unlocking component comprises inner wall matching teeth (401), a control shaft cavity (402) and a telescopic slot window (403); the inner wall surface of the feeding roller (2) is fixedly provided with inner wall matching teeth (401), and the inner wall matching teeth (401) are evenly distributed in a circular array; the feeding control shaft (4) is provided with a control shaft cavity (402) inside, and the inner wall surface of the control shaft cavity (402) is provided with a telescopic slot window (403) extending outward; a movable clamping plate (404) is inserted in the telescopic slot window (403); the movable clamping plate (404) is provided in the inner wall surface of the feeding roller (2); The position of the clamping plate (404) corresponds to that of the inner wall matching teeth (401), and the movable clamping plate (404) is inserted between the inner wall matching teeth (401) to limit the position, so that when the feeding control shaft (4) rotates, it can drive the feeding roller (2) to rotate synchronously; an internal parallel plate (405) is provided inside the control shaft cavity (402), and the internal parallel plate (405) is fixedly installed with the movable clamping plate (404), and a limiting through hole (406) is provided on the surface of the internal parallel plate (405), and the limiting through hole A limiting vertical shaft (407) is inserted in (406), and both ends of the limiting vertical shaft (407) are fixed to the inner wall surface of the control shaft cavity (402); a separation support spring (408) is provided on the outside of the internal parallel plate (405), and the separation support spring (408) applies elastic pressure to the internal parallel plate (405), so that the movable clamping plate (404) has an elastic tendency to move toward the inner wall matching tooth (401), and an inclined guide strip (409) is fixed on the surface of the internal parallel plate (405); The end of the control shaft cavity (402) is connected to an axial air cavity (410), in which a piston body (411) is provided. The piston body (411) is in sealing contact with the axial air cavity (410), and a polymer pressure tube (412) is fixedly provided on the surface of the piston body (411). When the polymer pressure tube (412) moves axially toward the inclined guide bar (409), the movable clamping plate (404) can be retracted toward the interior of the control shaft cavity (402) by squeezing the inclined guide bar (409).

2. A drafting device for a linen spinning frame according to claim 1, characterized in that: An annular limiting eaves (413) is fixedly provided on the inner wall of the axial air cavity (410), and a piston return spring (414) is provided between the annular limiting eaves (413) and the piston body (411). The piston return spring (414) applies an elastic thrust to the piston body (411) to move in a direction away from the inclined guide strip (409).

3. The drafting device for a linen spinning frame according to claim 2, characterized in that: A secondary communicating air path (415) is provided inside the feed control shaft (4), one end of the secondary communicating air path (415) is communicated with the axial air cavity (410), and the other end of the secondary communicating air path (415) is connected to the outer surface of the feed control shaft (4) and corresponds to the position of the feed roller (2); when the piston body (411) is driven by air pressure to pass through the connecting port between the secondary communicating air path (415) and the axial air cavity (410), the gas enters the secondary communicating air path (415).

4. The drafting device for a linen spinning frame according to claim 3, characterized in that: An annular outer groove (416) is provided on the surface of the feed control shaft (4), and the annular outer groove (416) is an annular groove. The annular rotating cover (5) is located inside the annular outer groove (416), and the annular rotating cover (5) is in airtight contact with the annular outer groove (416). An input air path (417) is provided inside the feed control shaft (4), and the annular outer groove (416) is communicated with the axial air cavity (410) through the input air path (417).

5. The drafting device for a linen spinning frame according to claim 1, characterized in that: Side support plates (101) are symmetrically arranged on both sides of the leather ring (1), and a support roller (102) and a drive roller (103) are installed between the two groups of side support plates (101). The leather ring (1) is supported by the support roller (102) and the drive roller (103), and the leather ring (1) is driven to rotate by the drive roller (103).

6. The drafting device for a linen spinning frame according to claim 1, characterized in that: The feeding roller (2) is provided with a matching roller (201) on the outside, and the feeding roller (2) and the matching roller (201) cooperate to clamp the yarn. The matching roller (201) is provided with a lifting movable bracket (202), and the lifting movable bracket (202) is installed with the lifting module of the spinning frame and is used to drive the matching roller (201) to move up and down relative to the feeding roller (2). The front roller (3) is provided with a rubber pressure roller (301) on the outside, and the front roller (3) and the rubber pressure roller (301) cooperate to clamp the yarn.

7. The drafting device for a linen spinning frame according to claim 1, characterized in that: A bearing (203) is installed between the feeding roller (2) and the feeding control shaft (4), and limiting side rings (204) are symmetrically provided on both sides of the feeding roller (2), and the limiting side rings (204) are fixedly installed on the feeding control shaft (4).

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