A double twisting method for processing blended fiber yarns

Abstract

The present invention discloses a double-twisting method for processing blended fiber yarns, which relates to the technical field of textile processing. It includes extracting the yarn of the blended fiber yarn from the yarn bobbin, and then winding one end of the yarn around the overfeed roller, the friction roller and the twisting roller in sequence; the humidifying and static-eliminating device humidifies the yarn released from the yarn bobbin. During the humidifying process of the yarn, the yarn will be intermittently squeezed by the humidifying and static-eliminating device, so that the yarn is in an intermittent tension state; when the yarn is in a tension state, the yarn breakage detection device detects the breakage of the yarn. When the breakage of the yarn is detected, the alarm device is triggered to give an alarm prompt. For this double-twisting method for processing blended fiber yarns, the present invention can humidify the yarn when the yarn is released from the yarn bobbin by setting the humidifying and static-eliminating device. When the humidified yarn rubs against the surface of the friction roller, no static electricity will be generated, avoiding the static electricity of the yarn being adsorbed on the twisting roller and resulting in a decrease in the twisting effect of the yarn.

Description

Technical Field

[0001] The present invention relates to the technical field of textile processing, and specifically to a doubling method for processing blended fiber yarns. Background Technique

[0002] Blending means blended chemical fiber fabrics, which are textile products woven by mixing chemical fibers with other natural fibers such as cotton, wool, silk, and hemp. They have both the style of polyester and the advantages of cotton fabrics, such as polyester-cotton fabrics, polyester-wool gabardine, etc. Blending is divided into wool-viscose blending, sheep-rabbit hair blending, TR fabric, high-density NC fabric, 3M waterproof mousse fabric, Tencel fabric, soft silk, TNC fabric, composite fabric, etc.

[0003] Doubling is to twist and bond two or more single yarns into a ply yarn, and enhance the performance of the original yarn. After retrieval, a doubling machine is provided in Chinese Patent Publication No. CN210560946U, which includes a twisting roller, a friction roller is arranged under the twisting roller, an overfeed roller is arranged under the friction roller, a broken yarn detection device is arranged under the overfeed roller, a yarn storage cylinder is arranged under the broken yarn detection device. The broken yarn detection device includes a support frame, a dropping plate is hinged on the support frame, a wire hole is opened on the dropping plate, rotating shafts are symmetrically arranged in the wire hole, an inductor is arranged under the dropping plate, a cylinder is arranged on the support frame, the inductor is electrically connected to the cylinder, and a brake plate is arranged on the output shaft of the cylinder, and the brake plate is located above the yarn storage cylinder.

[0004] When the above-mentioned doubling in the prior art is performing doubling processing, when the yarn is wound out from the yarn bobbin, it may rub against the surface of the friction roller, thereby causing static electricity to be generated on the yarn. When the yarn has static electricity, when the subsequent yarn is wound around the twisting roller, the static electricity will cause the yarn to adhere to the twisting roller, and then cause the yarn to deviate, affecting the twisting effect of the twisting roller on the yarn.

[0005] Therefore, we propose a doubling method for processing blended fiber yarns. Summary of the Invention

[0006] The purpose of the present invention is to provide a doubling method for processing blended fiber yarns to solve the problems raised in the above background technique.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A doubling method for processing blended fiber yarns includes the following steps:

[0008] Take out the yarn of the blended fiber yarn from the yarn bobbin, and then wind one end of the taken-out yarn around the overfeed roller, the friction roller and the twisting roller in sequence;

[0009] The yarn bobbin is driven by a motor to rotate, and then starts to pay out the yarn. At the same time, the twisting roller twists and winds the yarn. During the process of the yarn bobbin paying out the yarn, the humidifying and anti-static device humidifies the yarn released from the yarn bobbin. During the humidifying process of the yarn, the yarn will be intermittently squeezed by the humidifying and anti-static device, making the yarn in an intermittently tensioned state;

[0010] When the yarn is in a tensioned state, the yarn breakage detection device detects the breakage of the yarn. When the breakage of the yarn is detected, the alarm device is triggered to give an alarm prompt;

[0011] The yarn bobbin is installed on the bottom plate, and two support plates are provided on the bottom plate. The overfeed roller, the friction roller and the twisting roller are horizontally rotatably connected to the two support plates. The humidifying and anti-static device is installed on the bottom plate, and the yarn breakage detection device is installed on the humidifying and anti-static device.

[0012] Preferably, the humidifying and anti-static device includes:

[0013] A shielding chamber fixedly connected to the bottom plate. The top of the shielding chamber is open and is provided with a cover plate. A yarn through-hole is opened on the cover plate. The yarn bobbin is vertically rotatably connected to the shielding chamber through a mounting shaft. The motor is installed in the shielding chamber and is drivingly connected to the shaft;

[0014] A mounting sleeve fixedly connected to the cover plate. A mounting hole in the form of a through-hole and communicating with the yarn through-hole is opened in the mounting sleeve;

[0015] A cylindrical water storage bladder placed in the mounting hole. A water storage cavity for storing deionized water is provided in the water storage bladder. The water storage bladder is also provided with a yarn through-hole communicating with the yarn through-hole. A plurality of capillary water outlet holes communicating with the water storage cavity are opened on the hole wall of the yarn through-hole;

[0016] An extrusion unit for intermittently squeezing the water storage bladder when the yarn bobbin rotates.

[0017] Preferably, a jack is opened on the shaft. The output shaft of the motor is inserted into the jack and is connected to the jack through a spline.

[0018] Preferably, the extrusion unit includes:

[0019] A conical sleeve coaxially connected to the upper end of the mounting sleeve. The outer diameter of the conical sleeve decreases successively from top to bottom. A plurality of strip-shaped grooves in the form of notches are arranged in an array along the axial direction of the conical sleeve. The strip-shaped grooves communicate with the mounting hole. The strip-shaped grooves divide the conical sleeve into a plurality of elastic flap bodies;

[0020] A plurality of sliding columns vertically slidably disposed through the cover plate, a first roller rotatably connected to the upper end of the sliding column, and the first roller correspondingly rollingly contacting the outer edges of a plurality of the elastic flaps;

[0021] A lifting ring commonly fixedly connected to one end of the plurality of sliding columns inserted into the shielding chamber;

[0022] A lifting mechanism for driving the lifting ring to reciprocate up and down.

[0023] Preferably, the lifting mechanism includes:

[0024] A rotating ring fixedly sleeved on the rotating shaft, the rotating ring being located below the lifting ring;

[0025] Two mounting columns fixedly connected to the upper end surface of the rotating ring;

[0026] A second roller rotatably connected to the upper ends of the mounting columns;

[0027] Two arc-shaped protrusions fixedly connected to the lower end surface of the lifting ring, and the second roller alternately rolls on the lower end surface of the lifting ring and the surface of the arc-shaped protrusions.

[0028] Preferably, the two mounting columns are symmetrically arranged along the axial direction of the rotating ring.

[0029] Preferably, the upper end surface of the conical sleeve is provided with an inwardly turned fan-shaped protrusion for limiting the upward movement of the water storage bladder.

[0030] Preferably, the wire break detection device includes:

[0031] A vertical rod fixedly connected to the upper surface of any one of the fan-shaped protrusions;

[0032] A detection rod horizontally slidably disposed through the vertical rod, one end of the detection rod facing radially inward of the conical sleeve;

[0033] An abutting plate fixedly connected to the end of the detection rod facing the conical sleeve;

[0034] An induction block disposed on the abutting plate;

[0035] A proximity switch disposed through the vertical rod, the proximity switch being used in cooperation with the induction block;

[0036] An elastic abutting unit for driving the detection rod to move radially inward of the conical sleeve.

[0037] Preferably, the elastic abutting unit includes:

[0038] A limit nut fixedly sleeved on the other end of the detection rod;

[0039] A limit ring sleeved on the detection rod and located between the abutting plate and the vertical rod;

[0040] A light-load spring wound around the detection rod and elastically abutting against the limit ring and the vertical rod at both ends of the elastic force direction.

[0041] Preferably, arc-shaped wing plates bent towards the conical sleeve are provided on both lateral sides of the abutting plate.

[0042] Compared with the prior art, the beneficial effects of the present invention are:

[0043] By setting a humidifying and static-eliminating device, the present invention can humidify the yarn when the yarn is unwound from the yarn bobbin. When the humidified yarn rubs against the surface of the friction roller, no static electricity will be generated, avoiding the static electricity of the yarn being adsorbed on the twisting roller and resulting in a decline in the twisting effect of the yarn;

[0044] By setting a broken yarn detection device, the present invention can detect broken yarns during the unwinding process of the yarn, avoiding the situation that workers cannot handle it in time after the yarn is broken and causing abnormal twisting operations;

[0045] When the sliding column moves upward in the present invention, the first roller rolls on the surface of the elastic flap on the conical sleeve, and thus can squeeze the elastic flap, so that the water storage bladder is squeezed by the elastic flap, thereby realizing the intermittent water discharge of the water storage bladder. In addition, when the water storage bladder is squeezed, it can squeeze the yarn to make the yarn in a tensioned state, which is convenient for broken yarn detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the overall structure of the doubling frame in the embodiment of the present invention;

[0047] Figure 2 is Figure 1 A cross-sectional schematic diagram of a partial structure in

[0048] Figure 3 is Figure 2 A front view schematic diagram of the structure in

[0049] Figure 4 is Figure 3 An enlarged schematic diagram of the partial structure at A in

[0050] Figure 5 is Figure 1 A side view schematic diagram of the structure in

[0051] Figure 6 It is a cross-sectional structure schematic diagram of the water storage bladder in the present invention;

[0052] Figure 7This is a schematic structural diagram of the lifting ring and the sliding column after assembly in the present invention;

[0053] Figure 8 This is a schematic structural diagram of the mounting sleeve and the conical sleeve after assembly in the present invention;

[0054] Figure 9 is Figure 8 a schematic cross-sectional view of the structure in

[0055] Explanation of each reference numeral in the figure: 1 - bottom plate; 2 - shielding bin; 3 - mounting sleeve; 4 - cover plate; 5 - overfeed roller; 6 - twisting roller; 7 - friction roller; 8 - support plate; 9 - sliding column; 10 - rotating ring; 11 - rotating shaft; 12 - motor; 13 - lifting ring; 14 - yarn bobbin; 15 - first roller; 16 - arc-shaped convex block; 17 - second roller; 18 - vertical rod; 19 - proximity switch; 20 - limit nut; 21 - light load spring; 22 - limit ring; 23 - abutting plate; 24 - induction block; 25 - yarn threading hole; 26 - water storage cavity; 27 - capillary water outlet hole; 28 - water storage bladder; 29 - fan-shaped protrusion; 30 - conical sleeve; 31 - mounting hole; 32 - strip-shaped groove. Specific embodiments

[0056] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0057] Please refer to Figures 1-9 , the present invention provides a technical solution: a doubling method for processing blended fiber yarns, which is operated through a doubling machine. The doubling machine includes a bottom plate 1. On opposite sides of one end of the bottom plate 1, support plates 8 are vertically welded. An overfeed roller 5, a friction roller 7, and a twisting roller 6 are sequentially horizontally rotatably connected on the two support plates 8. Among them, the twisting roller 6 is driven to rotate by an external twisting motor. A shielding bin 2 is installed at one end of the bottom plate 1 away from the support plates 8. A bracket is welded inside the shielding bin 2, and a motor 12 is vertically installed on the bracket. A rotating shaft 11 is telescopically sleeved on the output shaft of the motor 12. That is, a blind hole-shaped insertion hole is coaxially opened at the bottom of the rotating shaft 11, and the output shaft of the motor 12 is telescopically inserted into the insertion hole and is connected to the hole wall of the insertion hole through splines, so that the rotating shaft 11 can be quickly disassembled from the output shaft of the motor 12.

[0058] The doubling method of this doubling machine includes the following steps:

[0059] 1) Draw out the yarn of the blended fiber yarn from the yarn bobbin 14, and then wind one end of the drawn yarn around the overfeed roller 5, the friction roller 7 and the twisting roller 6 in sequence. The twisting motor drives the twisting roller 6 to rotate, and synchronously drives the overfeed roller 5 and the friction roller 7 to rotate through the gear reduction mechanism, so as to twist the released yarn (the working principle of twisting is the prior art and will not be elaborated here);

[0060] 2) The yarn bobbin 14 is driven to rotate by the motor 12, and then starts to pay out the yarn. At the same time, the twisting roller 6 twists and winds the yarn. During the process of the yarn bobbin 14 paying out the yarn, the humidifying and anti-static device humidifies the yarn released from the yarn bobbin 14. During the humidifying process of the yarn, it will be intermittently squeezed by the humidifying and anti-static device, making the yarn in an intermittent tension state. Specifically, the humidifying and anti-static device includes a shielding chamber 2 fixedly connected to the bottom plate 1. The shielding chamber 2 is made of a metal material. The top of the shielding chamber 2 is open and is equipped with a cover plate 4. The cover plate 4 is provided with a yarn perforation. The yarn bobbin 14 is vertically rotatably connected to the shielding chamber 2 through the mounting rotating shaft 11. The motor 12 is installed in the shielding chamber 2 and is drivingly connected to the rotating shaft 11. A mounting sleeve 3 is vertically welded on the cover plate 4. An installation hole 31 in the form of a through hole and communicating with the yarn perforation is provided in the mounting sleeve 3. A cylindrical water storage bladder 28 is installed in the installation hole 31. A water storage cavity 26 for storing deionized water is provided in the water storage bladder 28. The water storage bladder 28 is also provided with a yarn passing hole 25 communicating with the yarn perforation. A plurality of capillary water outlet holes 27 communicating with the water storage cavity 26 are provided on the hole wall of the yarn passing hole 25. The upper end of the mounting sleeve 3 is coaxially connected with a conical sleeve 30. The outer diameter of the conical sleeve 30 decreases successively from top to bottom. A plurality of strip-shaped grooves 32 in the form of notches are arranged along the axial direction of the conical sleeve 30. The strip-shaped grooves 32 communicate with the installation hole. The strip-shaped grooves 32 divide the conical sleeve 30 into a plurality of elastic petals. Four sliding columns 9 are vertically slidably penetrated through the cover plate 4. The upper end of the sliding column 9 is rotatably connected with a first roller 15. The first roller 15 correspondingly rolls in contact with the outer edges of a plurality of elastic petals. That is, when the sliding column 9 moves upward, the first roller 15 will squeeze the elastic petals, making the elastic petals bend towards the radially inner direction of the conical sleeve 30, and thus making the conical sleeve 30 in an elastic contraction state. When the conical sleeve 30 is elastically contracted, the hole wall of the installation hole 31 will squeeze the water storage bladder 28, and thus the deionized water in the water storage cavity 26 will seep out from the capillary water outlet holes 27 and wet the yarn passing through the yarn passing hole 25. One end of the four sliding columns 9 penetrating into the shielding chamber 2 is jointly welded with a lifting ring 13. A rotating ring 10 is fixedly sleeved on the rotating shaft 11. The rotating ring 10 is located below the lifting ring 13, and the yarn bobbin 14 can freely pass through the rotating ring 10. Two mounting columns are symmetrically welded on the upper end surface of the rotating ring 10 along its axial direction. The upper ends of the mounting columns are rotatably connected with second rollers 17. Two arc-shaped convex blocks 16 are welded on the lower end surface of the lifting ring 13. The second rollers 17 alternately roll on the lower end surface of the lifting ring 13 and the surfaces of the arc-shaped convex blocks 16. When the motor 12 is powered on, it will drive the rotating shaft 11 to rotate. When the rotating shaft 11 rotates, it will drive the rotating ring 10 to rotate, making the second rollers 17 roll on the lower end surface of the lifting ring 13 and the arc-shaped convex blocks 16. When the second rollers 17 roll on the lower end surface of the lifting ring 13, due to the reaction force of the elastic petals on the first roller 15, the lifting ring 13 moves downward. When the second rollers 17 roll on the surfaces of the arc-shaped convex blocks 16, it will drive the lifting ring 13 to move upward, and thus make the sliding rod 9 move upward.During the upward movement, the first roller 15 will squeeze the outer wall of the elastic flap body, generating a squeezing force on the elastic flap body, so that the elastic flap body can squeeze the water storage bladder 28. At the same time, the yarn on the yarn cylinder 14 passes through the yarn perforation and the yarn passing hole 25 in sequence. Therefore, when the water storage bladder 28 is squeezed, the deionized water in the water storage cavity 26 will seep out from the capillary water outlet hole 27 and wet the yarn.

[0061] Furthermore, the upper end surface of the conical sleeve 30 is provided with a fan-shaped protrusion 29 formed by inverting inward, and the fan-shaped protrusion 29 is used to limit the upward movement of the water storage bladder 28, so as to prevent the water storage bladder 28 from detaching from the conical sleeve 30. In addition, the water storage bladder 28 is also provided with an interface, and a sealing cover is provided at the interface. By opening the sealing cover, the water storage cavity 26 of the water storage bladder 28 can be replenished with water. In addition, the annular hole surrounded by the fan-shaped protrusion 29 can allow the interface to pass freely.

[0062] 3) When the yarn is in a tensioned state, the yarn breakage detection device detects the yarn for breakage. When the yarn breakage is detected, the alarm device is triggered to give an alarm prompt. Specifically, the yarn breakage detection device includes a vertical rod 18 fixedly connected to the upper surface of one of the fan-shaped protrusions 29. A detection rod is horizontally slidably inserted through the vertical rod 18. One end of the detection rod faces the radial inner side of the conical sleeve 30. A contact plate 23 is welded to the end of the detection rod facing the conical sleeve 30. An induction block 24 is provided on the contact plate 23. A proximity switch 19 is inserted into the vertical rod 18. The proximity switch 19 is used in cooperation with the induction block 24. The other end of the detection rod is fixedly sleeved with a limit nut 20. A limit ring 22 is sleeved on the detection rod between the contact plate 23 and the vertical rod 18. A light load spring 21 with elastic force acting against the limit ring 22 and the vertical rod 18 at both ends is wound around the detection rod. When the conical sleeve 30 elastically contracts to squeeze the water storage bladder 28 so that the water storage bladder 28 wets the yarn, the fan-shaped protrusion 29 will move towards the radial inner side of the conical sleeve 30, and then the vertical rod 18 will move towards the yarn until the contact plate 23 contacts the yarn. Since the yarn is squeezed by the water storage bladder 28 and is subjected to the pulling force of the twisting roller 6 at this time, the yarn will be in a tensioned state. When the contact plate 23 contacts the yarn, it is subjected to the resistance of the yarn, so that the contact plate 23 moves in the opposite direction and the limit ring 22 compresses the light load spring 21. At the same time, the induction block 24 enters the induction range of the proximity switch 19, and the proximity switch 19 generates an induction signal and feeds it back to the external control device. The control device determines that the yarn is intact. On the contrary, if the yarn breaks, the contact plate 23 cannot contact the yarn. At this time, the limit ring 22 cannot compress the light load spring 21, so that the proximity switch 19 does not generate an induction signal. At this time, the control device does not receive the induction signal and thus determines that the yarn breaks, and then activates the sound and light alarm device for sound and light alarm.

[0063] Further, arc-shaped wing plates that bend towards the conical sleeve 30 are provided on both lateral sides of the bottom plate 23. By providing the arc-shaped wing plates, the swinging of the yarn can be prevented.

[0064] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0065] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-twisting method for processing blended fiber yarns, characterized in that, The steps include: Withdraw the yarn of the blended fiber yarn from the yarn bobbin (14), and then wind one end of the withdrawn yarn around the overfeed roller (5), the friction roller (7) and the twisting roller (6) in sequence; The yarn bobbin (14) is driven to rotate by the motor (12), and then starts to pay off the line. At the same time, the twisting roller (6) twists and winds the yarn. During the pay-off process of the yarn bobbin (14), the humidifying and static eliminating device humidifies the yarn released from the yarn bobbin (14). During the humidifying process of the yarn, the yarn will be intermittently squeezed by the humidifying and static eliminating device, so that the yarn is in an intermittent tension state; When the yarn is in a tension state, the yarn breakage detection device detects the breakage of the yarn. When the breakage of the yarn is detected, the alarm device is triggered to give an alarm prompt; The yarn bobbin (14) is installed on the bottom plate (1), and two support plates (8) are provided on the bottom plate (1). The overfeed roller (5), the friction roller (7) and the twisting roller (6) are horizontally rotatably connected to the two support plates (8). The humidifying and static eliminating device is installed on the bottom plate (1), and the yarn breakage detection device is installed on the humidifying and static eliminating device; The humidifying and static eliminating device includes: A shielding chamber (2) fixedly connected to the bottom plate (1). The top of the shielding chamber (2) is open and is provided with a cover plate (4). A yarn perforation is opened on the cover plate (4). The yarn bobbin (14) is vertically rotatably connected to the shielding chamber (2) through a mounting rotating shaft (11). The motor (12) is installed in the shielding chamber (2) and is drivingly connected to the rotating shaft (11); A mounting sleeve (3) fixedly connected to the cover plate (4). A mounting hole (31) in the form of a through hole and communicating with the yarn perforation is opened in the mounting sleeve (3); A cylindrical water storage bag (28) placed in the mounting hole (31). A water storage cavity (26) for storing deionized water is provided in the water storage bag (28). A yarn passing hole (25) communicating with the yarn perforation is also provided on the water storage bag (28). A plurality of capillary water outlet holes (27) communicating with the water storage cavity (26) are opened on the hole wall of the yarn passing hole (25); An extrusion unit for intermittently squeezing the water storage bag (28) when the yarn bobbin (14) rotates; The extrusion unit includes: A conical sleeve (30) coaxially connected to the upper end of the mounting sleeve (3). The outer diameter of the conical sleeve (30) decreases successively from top to bottom. A plurality of strip-shaped grooves (32) in the form of notches are arranged in the axial direction of the conical sleeve (30). The strip-shaped grooves (32) communicate with the mounting hole. The strip-shaped grooves (32) divide the conical sleeve (30) into a plurality of elastic flaps; A plurality of sliding columns (9) vertically slidably passing through the cover plate (4). A first roller (15) is rotatably connected to the upper end of the sliding column (9). The first roller (15) is in rolling contact with the outer edges of the plurality of elastic flaps correspondingly; A lifting ring (13) fixedly connected to the ends of the plurality of sliding columns (9) penetrating into the shielding chamber (2); A lifting mechanism for driving the lifting ring (13) to move up and down reciprocally; The lifting mechanism includes: A rotating ring (10) fixedly sleeved on the rotating shaft (11), and the rotating ring (10) is located below the lifting ring (13); Two mounting posts fixedly connected to the upper end surface of the rotating ring (10); A second roller (17) rotatably connected to the upper ends of the mounting posts; Two arc-shaped bumps (16) fixedly connected to the lower end surface of the lifting ring (13), and the second roller (17) alternately rolls on the lower end surface of the lifting ring (13) and the surface of the arc-shaped bumps (16); The upper end surface of the conical sleeve (30) is provided with an inturned fan-shaped protrusion (29), and the fan-shaped protrusion (29) is used to limit the upward movement of the water storage bladder (28); The wire break detection device includes a vertical rod (18) fixedly connected to the upper surface of any one of the fan-shaped protrusions (29).

2. The doubling twisting method for processing blended fiber yarn according to claim 1, characterized in that, A jack is formed on the rotating shaft (11), and the output shaft of the motor (12) is inserted into the jack and connected to the jack through a spline.

3. A doubling twisting method for processing blended fiber yarn according to claim 1, characterized in that, The two mounting posts are symmetrically arranged along the axial direction of the rotating ring (10).

4. A doubling method for processing blended fiber yarn according to claim 1, characterized in that, The wire break detection device further includes: A detection rod horizontally slidably penetrating through the vertical rod (18), and one end of the detection rod faces radially inward of the conical sleeve (30); A pressing plate (23) fixedly connected to the end of the detection rod facing the conical sleeve (30); An induction block (24) provided on the pressing plate (23); A proximity switch (19) penetrating through the vertical rod (18), and the proximity switch (19) is used in cooperation with the induction block (24); An elastic abutting unit for driving the detection rod to move radially inward of the conical sleeve (30).

5. A doubling method for processing blended fiber yarn according to claim 4, characterized in that, The elastic abutting unit includes: A limit nut (20) fixedly sleeved on the other end of the detection rod; A limit ring (22) sleeved on the detection rod and located between the pressing plate (23) and the vertical rod (18); A light-load spring (21) wound around the detection rod and elastically abutting against the limit ring (22) and the vertical rod (18) at both ends of the elastic force direction.

6. A doubling twisting method for processing blended fiber yarn according to claim 4, characterized in that, Arc-shaped wing plates bent towards the conical sleeve (30) are provided on both lateral sides of the pressing plate (23).

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