A profiled tube assembly for a compact spinning device

Abstract

The present application relates to a kind of profiled tube assemblies for condensing spinning device, including profiled tube, tension support mechanism, condensing lower roller, mesh ring and end cap, the lower part of the negative pressure condensing tube of profiled tube has rib plate, and the tension support seat of the lower part of rib plate is equipped with stem hole, the center O2 of the front camber of profiled tube is eccentric with the center O1 of condensing lower roller and is arranged at one side of condensing lower roller;Each tension support arm of tension support mechanism is arranged at the corresponding installation slot of tension support seat, and tension support arm and tension spring are installed on tension support seat by tension rod, mesh ring is sleeved on negative pressure condensing tube, the toothed working surface of condensing lower roller and tension support arm, and end cap is connected at the both ends of profiled tube, condensing lower roller and tension rod.The present application can improve the assembly accuracy of profiled tube assembly, increase the internal capacity of mesh ring, reduce the tension change of mesh ring caused by accumulated flowers, mesh ring has good synchronism, prolongs maintenance time, reduces production cost, and improves spinning consistency.

Description

Technical Field

[0001] This invention relates to a shaped tube assembly for a compact spinning device, belonging to the technical field of compact spinning devices. Background Technology

[0002] To eliminate the spinning triangle zone, a negative pressure gathering spinning device is added downstream of the main drafting stage of the compact spinning machine. The special-shaped tube assembly of the gathering spinning device mainly consists of a negative pressure gathering tube, a mesh ring, a gathering roller, and a tensioning mechanism for tensioning the mesh ring. The guide tube wall of the negative pressure gathering tube has multiple airflow guide grooves, and the surface of the mesh ring is densely covered with air holes. Multiple mesh rings are fitted onto each airflow guide groove of the negative pressure gathering tube, so that each airflow guide groove corresponds to a yarn. Under the action of negative pressure airflow in the negative pressure gathering tube, the yarn hairiness is gathered on the airflow guide groove while being transported by the rotation of the mesh ring, and then twisted to achieve the requirements of reducing yarn hairiness and increasing yarn strength.

[0003] The currently disclosed shaped tube assembly consists of a negative pressure gathering tube with a negative pressure chamber, a gathering lower roller on the lower front side of the shaped tube, a tension support mechanism, and a mesh ring. The gear on the front roller meshes with the gear on the gathering lower roller through a bridge gear, transmitting power to the gathering lower roller. The tension support mechanism is installed on the shaped tube and supports the corresponding mesh ring. After the yarn passes through the drafting device, its lint, fluff, and airborne dust can easily cause lint accumulation at the tension support. After lint accumulation, the tension support can easily cause the mesh ring to run out of the control range of the tension support, causing the mesh ring to deviate. The yarn cannot quickly enter the airflow guide groove. The yarn can only pass through part of the airflow guide groove, so it cannot fully achieve the required yarn lint and strength.

[0004] To address the issue of yarn misalignment, tension support mechanisms employ two main approaches: a combined flipping structure and a gravity-based structure. The combined flipping structure consists of a tension support base, a tension support frame, and two positioning springs. The positioning springs mount the tension support frame to the tension support base on the lower side of the negative pressure gathering tube. The support point of the tension support frame on the yarn ring is located at the bottom, further away from the yarn entry airflow guide channel. This reduces the contact area between the yarn ring and the lower gathering roller, minimizing friction and extending the yarn ring's lifespan. However, the low friction between the yarn ring and the lower gathering roller also reduces the synchronization of the yarn rings. Furthermore, this type of tension support mechanism has many parts. The tension support frame is connected to the shaped tube at both ends via positioning springs, and the suction port of the suction tube is located at the bottom, making yarn accumulation inside the yarn ring unavoidable. The limited space between the tension support mechanism, the lower gathering roller, and the shaped tube inside the yarn ring makes it prone to yarn accumulation, leading to yarn misalignment and difficulty in controlling the tension. Another type of combined flip-up tension support mechanism has a dovetail mounting groove on the lower part of the guide tube wall of the negative pressure accumulator for placing the tension support seat. The tension support mechanism mainly consists of a tension support seat, a torsion shaft, a torsion spring, and a torsion plate. Each tension support seat corresponding to each airflow guide channel is inserted into the tension support mounting groove. The torsion shaft connects the tension support seat, the torsion spring, and the torsion plate. The torsion spring tensions the mesh ring downwards from the bottom of the downstream section of the negative pressure accumulator. This type of irregular tube assembly also suffers from a complex tension support mechanism structure, a small space between the tension support mechanism inside the mesh ring, the lower accumulator roller, and the irregular tube, and difficulty in controlling the tension of the mesh ring after it accumulates on the inner side.

[0005] The gravity-type tension support mechanism consists of multiple positioning support plates and a tension rod. The negative pressure gathering tube has dovetail mounting grooves on the lower part of the guide tube wall for placing the positioning support plates. Each positioning support plate is mounted on a shaped tube, and the tension rod is connected to the positioning support plates. A mesh ring is fitted onto the shaped tube, the lower gathering roller, and the tension rod, and the mesh ring is tensioned by the tension rod. While this structure simplifies the tension mechanism, installation and maintenance are very inconvenient, especially since multiple positioning support plates support a single tension rod. Because the elastic force of each positioning support plate can only be controlled by springs, the elastic force of the tension rod oscillates between the maximum and minimum elastic forces of each positioning support plate. Furthermore, the length of the mesh ring has a certain tolerance, resulting in different required tension levels for the mesh rings between different spindles. When the yarn passes through the gathering spinning device, this tension difference inevitably affects its gathering and subsequent drafting effects. Consequently, as working time increases, the elongation of each mesh ring during use varies, leading to poor mesh ring consistency.

[0006] Existing tension support mechanisms with combined flipping and gravity structures suffer from severe yarn buildup at the meshing point between the front roller and the lower gathering roller gear via the bridge gear. This is particularly pronounced at the mesh rings at both ends, which are close to the connection point of the tension support mechanism. The poor consistency of the mesh rings exacerbates fluctuations in yarn hairiness and strength between spindles. Secondly, the front wall of the profiled tube is coaxially aligned with the lower gathering roller, resulting in a very small distance between them. Yarn buildup at these points easily causes the lower gathering roller to bounce, a problem that has remained unresolved. Furthermore, in multi-spindle profiled tube assemblies with six or eight spindles, the profiled tube and tension bar are quite long. The two ends of the profiled tube are mounted on the roller seats, while the tension bar is mostly supported at the end of the profiled tube. Therefore, deformation of the profiled tube and tension bar can easily cause changes in the position of the tension support mesh rings, leading to tension variations. This also reduces the synchronicity of the mesh rings, directly affecting the yarn's performance indicators. Summary of the Invention

[0007] The purpose of this invention is to provide a shaped tube assembly for a compact spinning device that can improve the strength and assembly accuracy of the shaped tube, increase the internal capacity of the mesh ring to hold cotton, reduce tension changes in the mesh ring caused by cotton accumulation, improve mesh ring synchronization, extend maintenance time, reduce production costs, and improve spinning consistency.

[0008] The technical solution adopted by the present invention to solve its technical problem is: a special-shaped tube assembly for a gathering spinning device, characterized in that: it includes a special-shaped tube, which is used to introduce negative pressure airflow and simultaneously to limit the tension support mechanism. The special-shaped tube includes an integral negative pressure gathering tube with a smooth surface and a negative pressure cavity, and a rib plate extending from the lower part of the negative pressure gathering tube toward the gathering lower roller side. The open ends of the negative pressure gathering tube are sealed with elastic end plugs. The negative pressure gathering tube is provided with at least one air intake joint communicating with the negative pressure cavity and multiple airflow guide grooves on the arc-shaped guide tube wall. The lower part of the rib plate has a tension support seat. The tension support seat is provided with rod holes for installing tension rods. The tension support seat is provided with mounting grooves corresponding to the airflow guide grooves and used for installing tension support arms, and gear clearance grooves for avoiding the bridge gear. The center O2 of the front arc surface of the special-shaped tube on the gathering lower roller side is eccentrically set with the center O1 of the gathering lower roller.

[0009] A tension support mechanism is provided to provide tension to a mesh ring. It includes a tension support arm, a tension spring, and a tension rod. One side of the tension support arm has a tension rod seat for the tension rod to pass through, and the other side has an arc-shaped seat for supporting and guiding the mesh ring. The arc-shaped seat is located behind the lower roller. A side baffle is provided on the tension support arm to axially limit the mesh ring. The tension rod seat of the tension support arm has a spring slot. Each tension support arm is positioned in a corresponding mounting slot of the tension support seat. The tension rod passes through the rod hole of the tension support seat and the tension rod seat and tension spring of each corresponding tension support arm. The tension support arm and tension spring are mounted on the tension support seat of the shaped tube. The two ends of the tension spring abut against the inner side of the tension support arm and the mounting slot, respectively. The tension rod is disconnected at the gear clearance slot.

[0010] The lower roller is used to drive the mesh ring to rotate. The lower roller is provided with a lower roller gear that meshes with the bridge gear and a toothed working surface spaced apart. The two ends of the lower roller are provided with stepped shafts. Sealing gaskets and bearings are installed on the stepped shafts and seal one side of the bearings.

[0011] A mesh ring rotates along the arc-shaped guide tube wall, the lower gathering roller, and the arc-shaped seat of the tension support arm to gather the passing yarn. The mesh ring has ventilation mesh holes and is fitted onto the negative pressure gathering tube, the toothed working surface of the lower gathering roller, and the tension support arm. The mesh ring covers the corresponding airflow guide groove. The mesh ring has a distance H between it and the bottom of the rear tube wall of the negative pressure gathering tube. The wrap angle β of the mesh ring through the arc-shaped seat of the tension support arm is between 50° and 70°.

[0012] The end caps consist of two caps connected to both ends of the shaped tube, the lower roller, and the tension rod. Each end cap has a bearing seat, a negative pressure collecting tube seat, and a tension rod mounting hole. The negative pressure collecting tube seat is connected to the end of the negative pressure collecting tube and pressed against the elastic end plug. The lower roller is mounted in the bearing seat through a bearing, and the end cap seals the other side of the bearing. The vent hole on the end cap is connected to the bearing end face. The end of the tension rod is installed in the corresponding tension rod mounting hole. The outer periphery of the end cap has a positioning surface that mates with the roller seat.

[0013] The shaped tube of this invention features a smooth-surfaced rib extending from the lower part of the negative pressure gathering tube towards the lower gathering roller. This integrated rib structure significantly improves the strength of the shaped tube, solving the problem of reduced straightness during use due to the longer length of six-spindle and eight-spindle shaped tubes. The shaped tube of this invention has a tension support seat below the rib. The tension support seat has rod holes for installing tension rods and multiple mounting slots for placing tension support arms. Therefore, the tension rods install the tension support arms on the tension support seat, ensuring that the tension rods on both sides of each tension support arm are supported and connected to the tension support seat, preventing deformation after operation. This also improves the processing and installation accuracy of the shaped tube assembly, enhancing the consistency of the assembled mesh rings and ensuring more accurate installation positions. This ensures the consistency and accuracy of the fiber sliver in its floating zone after drafting and gathering, resulting in better spinning data and reducing yarn hairiness and strength fluctuations. In this invention, the shaped tube is located eccentrically on the center of the front arc surface of the lower collecting roller, increasing the space between the lower collecting roller and the front end face of the shaped tube. Only a tension support arm supports the mesh ring, with the arc center of the tension support arm's arc seat located behind the center of the lower collecting roller. This places the tension support point of the mesh ring behind both the lower collecting roller and the shaped tube, relatively far from the suction port of the suction tube, reducing cotton lint accumulation inside the mesh ring. Simultaneously, it increases the space between the tension support point of the mesh ring and the lower collecting roller, thus increasing the mesh ring's internal cotton holding capacity. This reduces the problem of tension changes caused by mesh ring displacement due to even a small amount of cotton accumulation, extending cleaning and maintenance time while significantly reducing maintenance workload and production costs. This invention simplifies the components of the tension support mechanism. The tension rod passes through the rod hole of the tension support seat, the tension rod seat of each corresponding tension support arm, the tension spring, and the tension rod mounting hole of the end cap. The tension rod seat of the tension support arm is set in the tension support seat, and the tension spring is located on the upper side of the lower tension support arm, thus reducing the phenomenon of yarn accumulation. Although the mesh rings at both ends are close to the end cap, the tension rod is installed in the tension rod mounting hole of the end cap, resulting in good mesh ring consistency and solving the problem of severe yarn accumulation at both ends, which leads to poor yarn spinning consistency. Attached Figure Description

[0014] The embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the irregular tube assembly used in the agglomeration spinning device of the present invention.

[0016] Figure 2 This is an exploded structural diagram of the disassembled mesh ring of the irregular tube assembly of the present invention.

[0017] Figure 3 yes Figure 1 A structural schematic diagram of the AA cross section.

[0018] Figure 4 This is a schematic diagram of the irregular tube assembly of the present invention.

[0019] Figure 5 yes Figure 4 Schematic diagram of the BB cross-section structure.

[0020] Figure 6 This is a schematic diagram of the irregular-shaped tube of the present invention.

[0021] Figure 7 This is a schematic diagram of the end cap structure of the present invention.

[0022] Wherein: 1—End cap, 1-1—Exhaust hole, 1-2—Positioning surface, 1-3—Bearing seat, 1-4—Negative pressure gathering tube seat, 1-5—Tension rod mounting hole, 2—Mesh ring, 3—Irregularly shaped tube, 3-1—Negative pressure gathering tube, 3-11—Intake hole, 3-12—Airflow guide groove, 3-13—Arc-shaped guide tube wall, 3-14—Front side tube wall, 3-15—Rear side tube wall, 3-2—Firming plate, 3-21—Rod hole, 3-22—Tension support seat, 3- 23—Installation slot, 3-24—Gear clearance slot, 4—Suction connector, 5—Lower roller for accumulating air, 5-1—Lower roller gear for accumulating air, 5-2—Toothed working surface, 5-3—Stepped shaft, 6—Tension support arm, 6-1—Tension rod seat, 6-11—Spring slot, 6-2—Side baffle, 6-3—Arc seat, 6-4—Rod slot, 7—Elastic end plug, 8—Bearing, 9—Sealing gasket, 10—Tension spring, 11—Tension rod, 12—Front roller. Detailed Implementation

[0023] See Figures 1-5 As shown, a profiled tube assembly for a compact spinning device according to the present invention includes a profiled tube 3, a tension support mechanism, a compacting lower roller 5, a mesh ring 2, and two end caps 1.

[0024] See Figures 1-5 As shown, the shaped tube 3 of the present invention is used to introduce negative pressure airflow and simultaneously to limit the tension support mechanism. The shaped tube 3 of the present invention includes an integral, smooth-surfaced negative pressure gathering tube 3-1 with a negative pressure cavity, and a reinforcing rib 3-2 extending from the lower part of the negative pressure gathering tube 3-1 towards the lower roller 5. Because the lower part of the negative pressure gathering tube 3-1 has the reinforcing rib 3-2, the strength of the shaped tube 3 can be significantly improved. For multi-spindle shaped tubes such as six-spindle or eight-spindle tubes, the straightness of the negative pressure gathering tube 3-1 can be maintained during spinning to maintain the synchronization of the mesh rings 2. See... Figure 3As shown, the open ends of the negative pressure collecting tube 3-1 of the present invention are sealed with elastic end plugs 7. The shape of the elastic end plugs 7 is the same as the inner cavity shape of the negative pressure collecting tube 3-1. The outer end of the elastic end plugs 7 is provided with a handle to facilitate pressing the elastic end plugs 7 into the negative pressure collecting tube 3-1 and prevent the negative pressure airflow from overflowing. See Figure 2 , 3 As shown in Figure 5, the negative pressure gathering tube 3-1 of the present invention includes a front tube wall 3-14, a rear tube wall 3-15, an arc-shaped guide tube wall 3-13 with rounded corners, and a bottom tube wall. The negative pressure gathering tube 3-1 is provided with at least one suction connector 4 communicating with the negative pressure chamber and multiple airflow guide grooves 3-12 on the arc-shaped guide tube wall 3-13. The suction connector 4 is sealed and fixed at the suction hole 3-11 of the negative pressure gathering tube 3-1. It is connected to a negative pressure air source through the suction connector 4, drawing negative pressure airflow into the negative pressure gathering tube 3-1, allowing the fiber bundle output from the front outlet of the front roller 12 to smoothly enter the arc-shaped guide tube wall 3-13, and pass through the arc... The negative pressure airflow from the airflow guide grooves 3-12 at the guide tube wall 3-13 causes the fibers to gather and then enter the toothed working surface 5-2 of the lower roller 5 for twisting. The present invention has one or more suction holes 3-11, which can be set according to the number of airflow guide grooves 3-12 to maintain consistent negative pressure airflow within the negative pressure gathering tube 3-1. The suction connector 4 of the present invention can be located at the arc-shaped guide tube wall 3-13 of the negative pressure gathering tube 3-1. The negative pressure airflow from the airflow guide grooves 3-12 on the arc-shaped guide tube wall 3-13 acts on each drawn fiber bundle, causing them to gather into a bundle, which is then twisted so that the fibers can be sealed and wound around the yarn. See Figure 3 As shown, the radius R1 of the arc-shaped guide tube wall 3-13 of the negative pressure collecting tube 3-1 of the present invention is between 28 and 40 mm. If the radius R1 is between 30 and 38 mm, and the arc center O4 of the arc surface of the arc-shaped guide tube wall 3-13 is located on the rear lower side of the rod hole center O3 of the tension support seat 3-22, the yarn passing through the front roller smoothly passes through the arc-shaped guide tube wall 3-13 through the front opening and enters the toothed working surface 5-2 of the collecting lower roller 5.

[0025] See Figure 3 As shown, the thickness h1 of the arc-shaped guide wall 3-13 of the negative pressure collecting pipe 3-1 of the present invention is between 0.7 and 2 mm, such as between 0.8 and 1.8 mm. The minimum thickness h2 of the stiffening plate 3-2 is between 2 and 5 mm, such as between 2.5 and 4.5 mm, to maintain the overall strength of the irregularly shaped pipe 3. The thickness h1 of the arc-shaped guide wall 3-13 of the present invention is greater than or equal to the thickness of the other pipe walls of the negative pressure collecting pipe 3-1.

[0026] See Figures 1-6As shown, the lower part of the reinforcing plate 3-2 of the present invention has a tension support seat 3-22. The tension support seat 3-22 is provided with rod holes 3-21 for installing tension rods 11. The tension support seat 3-22 is provided with mounting grooves 3-23 corresponding to the airflow guide grooves 3-12 and used for installing tension support arms 6, and gear clearance grooves 3-24 for avoiding the bridge gear. Therefore, when processing the shaped tube 3, the processing accuracy of the rod holes 3-21 and mounting grooves 3-23 can be guaranteed, thereby improving the assembly accuracy of the shaped tube assembly. The shaped tube 3 of the present invention has an integral tension support seat 3-22. With the improved strength of the shaped tube 3, the tension rods 11 with tension support arms 6 can be supported on the corresponding tension support seat 3-22. The position of the tension rods 11 will not change, and the position of the airflow guide grooves 3-12 corresponding to the grid rings on each spindle will not change. This can ensure the consistency and accuracy of the fiber sliver after drafting and agglomeration in its floating area, resulting in good spinning consistency.

[0027] See Figure 3 As shown, the center O2 of the front arc surface of the irregular tube 3 on one side of the lower roller 5 is eccentrically set with the center O1 of the lower roller 5. Therefore, the space between the lower roller 5 and the front end face of the irregular tube 3 can be increased, which can accommodate more accumulated flowers and reduce the impact on the lower roller 5 caused by the mesh ring 2 rotating and getting stuck after a small amount of flowers are trapped. The center O2 of the front arc surface of the shaped tube 3 of the present invention is located at the lower rear part of the center O1 of the lower collecting roller. The front arc surface of the shaped tube 3 includes the front side wall 3-14 and the stiffening plate 3-2 of the negative pressure collecting tube 3-1 with the same center and equal diameter. The eccentric distance e1 between the center O2 of the front arc surface and the center O1 of the lower collecting roller is between 1.5 and 3 mm, and e2 is between 0.5 and 1.5 mm. For example, if the eccentric distance e1 between the center O2 of the front arc surface and the center O1 of the lower collecting roller is between 1.8 and 2.5 mm, and e2 is between 0.8 and 1.2 mm, the radius of the front arc surface is between 10.5 and 15 mm. If R1 is between 10.5 and 15 mm, the distance between the lower collecting roller 5 and the front arc surface of the shaped tube 3 is increased without changing the existing installation position of the lower collecting roller 5.

[0028] See Figure 1 , 2As shown. The front arc surface of the irregular tube 3 of the present invention is tangent to and smoothly transitions with the arc surface of the tension support seat 3-22. The distance H2 between the center O3 of the rod hole of the tension support seat 3-22 and the center O1 of the lower roller is between 3mm upward and 3mm downward, with the center O1 of the lower roller as the reference. If the center O3 of the rod hole of the tension support seat 3-22 coincides with the center O1 of the lower roller, the bottom wall of the negative pressure collecting tube 3-1 transitions to the tension support seat 3-22 through the arc surface. The surface of the rib plate 3-2 is smooth and not easy to accumulate cotton. The tension support point of the present invention is located behind the center O1 of the lower roller, which not only makes the arc length of the mesh ring 2 and the lower roller 5 more extensive and the friction greater, and the synchronization of the mesh ring 2 better, but also keeps it away from the suction port of the suction tube, reducing the accumulation of cotton inside the mesh ring 2.

[0029] See Figures 1-6 As shown, the tension support mechanism of the present invention is used to provide tension to the mesh ring 2, including a tension support arm 6, a tension spring 10, and a tension rod 11. One side of the tension support arm 6 is provided with a tension rod seat 6-1 for the tension rod 11 to pass through, and the other side is provided with an arc-shaped seat 6-3 for supporting and guiding the mesh ring 2. The arc-shaped seat 6-3 is located at the rear of the lower roller 5. A side baffle is provided on the tension support arm 6 to axially limit the mesh ring 2. The tension rod seat 6-1 of the tension support arm 6 is provided with a spring slot 6-11. Each tension support arm 6 is located at the corresponding mounting slot 3-23 of the tension support seat 3-22. The tension rod 11 passes through the rod hole 3-21 of the tension support seat 3-22 and the corresponding tension rod seat 6-1 and tension spring 10 of each tension support arm 6. The tension support arm 6 and tension spring 10 are installed on the tension support seat 3-22 of the shaped tube 3. The two ends of the tension spring 10 respectively abut against the inner side of the tension support arm 6 and the mounting... At groove 3-23, one end of tension spring 10 abuts against the bottom of the mounting groove 3-23 of tension support seat 3-22, and the other side is attached to the inner side of tension support arm 6. Through the spring force provided by tension spring 10, tension support arm 6 provides tension to mesh ring 2. Tension rod 11 is disconnected at gear clearance groove 3-24, so that both sides of tension rod 11 connecting each tension support arm 6 are supported in rod hole 3-21, without affecting the meshing of bridge gear with front roller 12 and lower roller gear 5-1, which greatly improves the assembly accuracy of tension support mechanism. In this invention, tension rod 11 adopts coaxial long tension rod and short tension rod. The long tension rod and short tension rod are respectively inserted into rod hole 3-21 of tension support seat 3-22 and tension rod mounting hole 1-5 of corresponding tension support arm 6, tension spring 10 and end cover 1, so that tension support arm 6 and tension spring 10 are installed on tension support seat 3-22 and end cover 1.

[0030] See Figure 2 , 3As shown, the tension support arm 6 of the present invention has a rod groove 6-4 corresponding to the spring slot 6-11 and used to accommodate the spring rod. One spring rod of the tension spring 10 is horizontally placed and rests in the mounting groove 3-23, and the other spring rod of the tension spring 10 is disposed in the rod groove 6-4. The tension spring 10 can be a torsion spring. The spring rods at both ends of the tension spring 10 are respectively disposed in the mounting groove 3-23 and the rod groove 6-4 of the tension support arm 6, so that the spring rod of the tension spring 10 is located above the lower mesh ring 2, which can reduce the accumulation of fuzz at the tension spring 10. See Figure 3 As shown, the radius R3 of the arc-shaped seat 6-3 on the tension support arm 6 of the present invention is between 1 and 5 mm. If the radius R3 of the arc-shaped seat 6-3 is between 2 and 3 mm, the distance H1 between the center O5 of the arc-shaped seat on the tension support arm 6 and the center O1 of the lower roller is between 6 mm upward and 3 mm downward, with the center O1 of the lower roller as the reference. If the distance H1 is between 4 mm upward and 1 mm downward, with the center O1 of the lower roller as the reference, a side baffle is provided on the lower front side of the arc-shaped seat 6-3 to ensure the encircling arc length of the mesh ring 2 and the lower roller 5, so that the mesh rings 2 of each spindle have good synchronization.

[0031] See Figure 1 , 3 As shown, the lower roller 5 of this invention is used to drive the mesh ring 2 to rotate. The lower roller 5 is provided with a lower roller gear 5-1 that meshes with the bridge gear and a toothed working surface 5-2 spaced apart. The yarn is twisted between the upper roller and the toothed working surface 5-2. The lower roller 5 is provided with stepped shafts 5-3 at both ends. The sealing gasket 9 and the bearing 8 are installed on the stepped shafts 5-3 and seal one side of the bearing 8. When the end cover 1 is installed on the bearing 8, it can seal the other side of the bearing 8 to prevent fly shavings from entering the bearing 8 and affecting the service life of the bearing 8.

[0032] See Figure 1 , 3As shown, the mesh ring 2 of the present invention rotates along the arc-shaped guide tube wall 3-13, the lower gathering roller 5, and the arc-shaped seat 6-3 of the tension support arm 6 and is used to gather the passing yarn. The mesh ring 2 has ventilation mesh holes and is fitted on the negative pressure gathering tube 3-1, the toothed working surface 5-2 of the lower gathering roller 5, and the tension support arm 6. The mesh ring 2 covers the corresponding airflow guide groove 3-12. The mesh ring 2 and the bottom of the rear tube wall of the negative pressure gathering tube 3-1 have a distance H, which increases the space between the mesh ring 2 and the rear tube wall of the negative pressure gathering tube 3-1, increases the amount of yarn between the rear tube wall 3-15 and the mesh ring 2, and improves the original mesh ring 2 pressing against the rear tube wall of the negative pressure gathering tube 3-1, where a small amount of yarn accumulation would easily cause the mesh ring to deviate and reduce tension. To address the issue of difficulty in control, the mesh ring 2 and the bottom of the rear tube wall of the negative pressure gathering tube 3-1 have a distance H between 1 and 3.5 mm. For example, if the distance H is between 1.5 and 3 mm, the wrap angle β of the arc-shaped seat 6-3 of the tension support arm 6 is between 50° and 70°. Preferably, the wrap angle β of the mesh ring 2 through the arc-shaped seat 6-3 of the tension support arm 6 is between 55° and 65°, so that the mesh ring 2 has better synchronization. When the lower roller 5 rotates, it drives the mesh ring 2 to rotate at the respective airflow guide grooves 3-12 on the negative pressure gathering tube 3-1, which enables the drafted yarn to quickly enter the position of the airflow guide groove and pass through the airflow guide groove completely, so that the yarn can achieve the required yarn hairiness and strength.

[0033] See Figure 1 , 2 As shown in Figures 4, 5, and 7, the end caps 1 of this invention are two in number and connected to both ends of the shaped tube 3, the lower collecting roller 5, and the tension rod 11. The end caps 1 are used to connect the shaped tube 3 and the lower collecting roller 5 and are installed on the roller seat. The end caps 1 have a bearing seat 1-3, a negative pressure collecting tube seat 1-4, and a tension rod mounting hole 1-5. The negative pressure collecting tube seat 1-4 is connected to the end of the negative pressure collecting tube 3-1 and pressed against the elastic end plug 7, so that the shaped tube 3 of each unit is kept in a sealed state. The lower collecting roller 5 is connected to the bearing. Bearing 8 is installed inside bearing housing 1-3, and end cover 1 seals the other side of bearing 8. The vent hole 1-1 on end cover 1 connects to the end face of bearing 8, facilitating venting during end cover 1 installation. Simultaneously, after end cover 1 and bearings 8 at both ends of the lower collecting roller 5 are installed, the vent hole 1-1 is blocked by the outer ring end face of bearing 8, preventing fly shavings from entering bearing 8. This improves the sealing effect at the bearings 8 at both ends of the lower collecting roller 5, reduces dust and fly shavings at bearing 8, and minimizes the impact on the lower collecting roller 5. See... Figure 2 , 5As shown, the end of the tension rod 11 of the present invention is installed in the corresponding tension rod mounting hole 1-5, so that the end of the tension rod 11 is installed in the tension rod mounting hole 1-5. The outer periphery of the end cover 1 is provided with a positioning surface 1-2 that cooperates with the roller seat. The positioning surface 1-2 on the end cover 1 is a V-shaped positioning surface, which can install the assembled irregular tube assembly on the roller seat through the positioning surface 1-2 of the end cover 1.

[0034] See Figure 2 As shown, the negative pressure collecting tube seat 1-4 on the end cap 1 of the present invention is a positioning protrusion that protrudes from the end face and has the same shape as the wall of the negative pressure collecting tube 3-1. The positioning protrusion is set inside the negative pressure collecting tube 3-1 and pressed against the elastic end plug 7 set inside the negative pressure collecting tube 3-1, which can quickly install the end cap 1 on the negative pressure collecting tube 3-1 and maintain the sealing performance of the negative pressure collecting tube 3-1.

Claims

1. A shaped tube assembly for a compact spinning device, characterized in that: The device includes a shaped tube for introducing negative pressure airflow and for limiting the tension support mechanism. The shaped tube includes an integral, smooth negative pressure gathering tube with a negative pressure cavity and a rib extending from the lower part of the negative pressure gathering tube toward the lower roller. The open ends of the negative pressure gathering tube are sealed with elastic end plugs. The negative pressure gathering tube is provided with at least one suction connector communicating with the negative pressure cavity and multiple airflow guide grooves on the arc-shaped guide tube wall. The lower part of the rib has a tension support seat. The tension support seat is provided with rod holes for installing tension rods. The tension support seat is provided with mounting grooves corresponding to the airflow guide grooves and for installing tension support arms, and gear clearance grooves for avoiding the bridge gear. The center O2 of the front arc surface of the shaped tube on the lower roller side is eccentrically set with the center O1 of the lower roller. A tension support mechanism is provided to provide tension to a mesh ring. It includes a tension support arm, a tension spring, and a tension rod. One side of the tension support arm has a tension rod seat for the tension rod to pass through, and the other side has an arc-shaped seat for supporting and guiding the mesh ring. The arc-shaped seat is located behind the lower roller. A side baffle is provided on the tension support arm to axially limit the mesh ring. The tension rod seat of the tension support arm has a spring slot. Each tension support arm is positioned in a corresponding mounting slot of the tension support seat. The tension rod passes through the rod hole of the tension support seat and the tension rod seat and tension spring of each corresponding tension support arm. The tension support arm and tension spring are mounted on the tension support seat of the shaped tube. The two ends of the tension spring abut against the inner side of the tension support arm and the mounting slot, respectively. The tension rod is disconnected at the gear clearance slot. The lower roller is used to drive the mesh ring to rotate. The lower roller is provided with a lower roller gear that meshes with the bridge gear and a toothed working surface spaced apart. The two ends of the lower roller are provided with stepped shafts. Sealing gaskets and bearings are installed on the stepped shafts and seal one side of the bearings. A mesh ring rotates along the arc-shaped guide tube wall, the lower gathering roller, and the arc-shaped seat of the tension support arm to gather the passing yarn. The mesh ring has ventilation mesh holes and is fitted onto the negative pressure gathering tube, the toothed working surface of the lower gathering roller, and the tension support arm. The mesh ring covers the corresponding airflow guide groove. The mesh ring has a distance H between it and the bottom of the rear tube wall of the negative pressure gathering tube. The wrap angle β of the mesh ring through the arc-shaped seat of the tension support arm is between 50° and 70°. The end caps consist of two caps connected to both ends of the shaped tube, the lower roller, and the tension rod. Each end cap has a bearing seat, a negative pressure collecting tube seat, and a tension rod mounting hole. The negative pressure collecting tube seat is connected to the end of the negative pressure collecting tube and pressed against the elastic end plug. The lower roller is mounted in the bearing seat through a bearing, and the end cap seals the other side of the bearing. The vent hole on the end cap is connected to the bearing end face. The end of the tension rod is installed in the corresponding tension rod mounting hole. The outer periphery of the end cap has a positioning surface that mates with the roller seat.

2. The irregularly shaped tube assembly for a concentrated spinning device according to claim 1, characterized in that: The center O2 of the front arc surface of the irregular tube is located at the lower rear part of the center O1 of the lower roller.

3. A shaped tube assembly for a concentrated spinning device according to claim 2, characterized in that: The front arc surface of the shaped tube includes the front wall of the negative pressure collecting tube with the same center and equal diameter and a stiffening plate. The eccentric distance e1 between the center O2 of the front arc surface and the center O1 of the collecting lower roller is between 1.5 and 3 mm, and e2 is between 0.5 and 1.5 mm. The radius R of the front arc surface is between 10.5 and 15 mm.

4. A shaped tube assembly for a concentrated spinning device according to claim 2, characterized in that: The front arc surface of the shaped tube is tangent to the arc surface of the tension support seat and transitions smoothly. The distance H2 between the center O3 of the rod hole of the tension support seat and the center O1 of the lower roller is between 3mm upward and 3mm downward based on the center O1 of the lower roller. The bottom wall of the negative pressure collecting tube transitions to the tension support seat through the arc surface.

5. A shaped tube assembly for a concentrated spinning device according to claim 1, characterized in that: The tension support arm is provided with a rod groove corresponding to the spring slot and used to accommodate the spring rod. One spring rod of the tension spring is placed horizontally and rests against the mounting groove, while the other spring rod of the tension spring is set in the rod groove.

6. A shaped tube assembly for a compact spinning device according to claim 1 or 5, characterized in that: The radius R3 of the arc-shaped seat on the tension support arm is between 1 and 5 mm. The distance H1 between the center O5 of the arc-shaped seat on the tension support arm and the center O1 of the lower roller is between 6 mm upward and 3 mm downward, with the center O1 of the lower roller as the reference. A side baffle is provided on the lower front side of the arc-shaped seat.

7. A shaped tube assembly for a compact spinning device according to claim 1, characterized in that: The radius R1 of the arc-shaped guide wall of the negative pressure collecting pipe is between 28 and 40 mm, and the center O4 of the arc surface of the arc-shaped guide wall is located on the lower rear side of the center O3 of the rod hole of the tension support seat.

8. A shaped tube assembly for a compact spinning device according to claim 7, characterized in that: The thickness h1 of the arc-shaped guide wall of the negative pressure collecting pipe is between 0.7 and 2 mm, and the minimum thickness h2 of the stiffener is between 2 and 5 mm.

9. A shaped tube assembly for a compact spinning device according to claim 1, characterized in that: The distance H between the mesh ring and the bottom of the rear pipe wall of the negative pressure collecting pipe is between 1 and 3.5 mm.

10. A shaped tube assembly for a compact spinning device according to claim 1, characterized in that: The negative pressure collecting tube seat on the end cap is a positioning protrusion that protrudes from the end face and has the same shape as the wall of the negative pressure collecting tube. The positioning protrusion is set inside the negative pressure collecting tube and pressed against the elastic end plug set inside the negative pressure collecting tube.

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