A single-duct low-energy consumption compact spinning system

Abstract

The present invention provides a single-duct low-energy consumption compact spinning system, which includes a negative-pressure air box with a three-layer structure and a pneumatic self-cleaning rotary dust cage. The negative pressure for compact spinning and the negative pressure for process cotton suction share the same air duct, and the negative pressure for compact spinning and the negative pressure for process cotton suction are distributed through a variable-diameter throttle pipe. The upper layer of the negative-pressure air box is a negative-pressure chamber, the middle layer is a cotton stripping chamber, and the lower layer is a waste cotton chamber. The negative-pressure chamber and the cotton stripping chamber are partially isolated by a first partition board, a second partition board and a part of the rotary dust cage. Multiple groups of impellers are provided inside the rotary dust cage, and the negative-pressure air flow acts on the impellers to drive the rotary dust cage to rotate. The suction port of the blower and the air duct form an air flow channel. There is no air flow inlet in the cotton stripping chamber and the waste cotton chamber, thus forming a constant-pressure chamber. The fibers on the surface of the rotary dust cage enter the cotton stripping chamber and are stripped off by the cotton stripping scraper and fall into the waste cotton chamber. The cotton stripping chamber and the waste cotton chamber are isolated by a fixed partition board and a movable partition board. When opening the waste cotton chamber to take out the recycled waste, the negative pressure in the negative-pressure chamber is not affected.

Description

Technical Field

[0001] The present invention belongs to the new technology field of spinning, and relates to a single-air-channel low-energy-consumption compact spinning system. Background Art

[0002] The compact spinning technology plays a significant role in improving the quality of yarn products. However, the energy consumption of the air-flow negative-pressure compact spinning device is relatively high. Reducing the energy consumption of the air-flow negative-pressure compact spinning device is of great significance for textile enterprises to reduce costs. At present, the existing number of cotton spindles in China reaches 120 million spindles, and the production capacity of compact spinning is about more than 40 million spindles, still having a large room for improvement. In the commonly used negative-pressure air-flow compact spinning, the negative-pressure energy consumption for spinning each spindle of yarn is about 8-10 watts, and the energy consumption of the installed capacity per 10,000 spindles is as high as more than 110 kilowatts.

[0003] The negative-pressure air flow of the compact spinning frame is provided by the blower of the air box of the spinning frame. The traditional air box of the compact spinning frame includes two air boxes with different functions. One is the suction cotton air box that provides negative-pressure air flow for the nozzle pipe to suck away the fibers generated by the broken yarn ends; the other is the negative-pressure air box of the compact spinning that provides the compacting air flow for the fiber bundle in the compact spinning device. To ensure the spinning quality, the negative-pressure air box of the compact spinning has relatively high requirements for the air-flow fluctuation range, and the negative-pressure air flow cannot fluctuate greatly to affect the yarn quality. The suction cotton air box of the spinning frame is responsible for sucking away all the fibers output by the front roller at the broken yarn end position of the spindle and collecting them. The fibers sucked into the suction cotton air box will be adsorbed on the filter screen, reducing the suction cotton negative pressure. Only after cleaning the fibers on the filter screen can the suction cotton negative pressure return to the initial state. The fibers adsorbed on the filter screen of the traditional suction cotton air box of the spinning frame are usually removed by manual. During the production process of the spinning frame, it is necessary to repeatedly clean the fibers in the suction cotton air box to ensure the negative pressure size at the nozzle pipe orifice. At the same time, the fibers recovered in the suction cotton air box can also be recycled. The negative-pressure fluctuation of the suction cotton air box far exceeds that of the negative-pressure air box of the compact spinning, so it is impossible to simply simplify the negative-pressure air box of the compact spinning and the suction cotton air box into one air box.

[0004] An energy-saving air box for a spinning frame with the publication number CN 220202129 U is provided with a scraping and suction mechanism on the outer side of the negative-pressure filter screen. The bristles on the scraping and suction box of the scraping and suction mechanism scrape the negative-pressure filter screen, and at the same time, the suction port on the scraping and suction box sucks and cleans the short lint impurities after scraping, avoiding the short lint impurities being re-adsorbed on the negative-pressure filter screen to affect the normal operation of the negative-pressure filter screen after the scraping operation. The short lint impurities after suction enter the filter bag through the suction pipe and the air guide pipe, effectively improving the working efficiency of the negative-pressure filter screen. In the actual operation of the air box of the spinning frame, the negative-pressure air flow pressure of the blower is very large, and the fibers are tightly adsorbed on the filter screen under the action of the air flow pressure. It is difficult to clean the fibers on the surface of the filter screen with a scraping brush with a suction device, and a larger suction negative pressure is required, resulting in an obvious increase in equipment energy consumption.

[0005] An automatic cleaning cotton suction air box of a flyer frame with the publication number CN110747546B divides the cotton suction air box into two interconnected chambers. An upper and lower cotton box air flow blocking plate that divides the negative pressure chamber into an upper cotton suction box and a lower waste cotton box is provided in the negative pressure chamber. The compact spinning negative pressure air duct and the process exhaust air duct communicate with the upper cotton suction box. Its filter screen structure adopts the rotary dust cage structure commonly used in the condensing cotton device of textile equipment. Two air flow blocking rollers in a free state are arranged inside the dust cage. By setting local areas of the filter screen as low negative pressure areas through the air flow blocking rollers, the fibers on the filter screen fall off into the lower waste cotton box, achieving an energy-saving effect. However, this method fails to fully consider the detailed characteristics of the operation of the flyer frame air box. The two air flow blocking rollers in a free state are affected by frictional forces during the rotation of the dust cage. The blocking rollers will move circumferentially along the dust cage and at the same time move towards the lowest point of the dust cage under the action of their own gravity. Due to the change in the positions of the two blocking rollers on the dust cage, the two rollers will exhibit reciprocating swings under the action of frictional forces and gravity. In addition, during the movement of the two blocking rollers, the movement directions of their contact points are opposite, and there is mutual friction between the two rollers. The two blocking rollers will have different forces and the situation of unsmooth movement, and cannot achieve a stable air flow blocking effect. Especially when the fibers in the waste cotton bin need to be cleaned, when the bin door is opened, a pressure difference will be formed between the negative pressure air box and the outside atmosphere through the bin door. Under the action of the huge air flow pressure, the blocking rollers will be lifted by the high-pressure air flow and cannot play a blocking role. At this time, the negative pressure of the compact spinning drops sharply, seriously affecting the yarn quality. At the same time, the fibers in the waste cotton bin will be adsorbed onto the surface of the dust cage again and cannot be completely cleared out of the waste cotton bin.

[0006] The key point of the present invention is to propose a single-duct low-energy consumption compact spinning system. The air box of this system is a three-layer structure and adopts a rotary dust cage with an impeller, which can rotate under the action of negative pressure air flow, thereby realizing self-cleaning of the dust cage. Combined with the negative pressure air flow branch pipe structure of the new compact spinning device, on this basis, the compact spinning air duct and the process air duct are combined into one, achieving the purpose of reducing energy consumption. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a single-duct low-energy consumption compact spinning system. The air box of the compact spinning flyer frame is designed as a self-cleaning dust cage and a three-layer structure air box to maintain the stability of the air box negative pressure, combine the compact spinning negative pressure air duct and the process cotton suction air duct into one, and reduce the energy consumption of spinning. At the same time, when manually cleaning the waste cotton in the waste cotton bin, it does not affect the pressure of the negative pressure air flow duct.

[0008] The technical solution of the present invention is as follows:

[0009] A single-duct low-energy consumption compact spinning system of the present invention includes a negative-pressure air box with a three-layer structure, a pneumatic self-cleaning rotary dust cage, a common duct for the negative pressure of compact spinning and the negative pressure of process cotton suction, and the negative pressure of compact spinning and the negative pressure of process cotton suction are distributed through a variable-diameter throttle pipe. The negative-pressure air box includes a negative-pressure bin in the upper layer, a cotton stripping bin in the middle layer, and a waste cotton bin in the lower layer. The main body of the pneumatic self-cleaning rotary dust cage is located in the negative-pressure bin. The arc surface with a certain arc length on the rotary surface is the boundary between the negative-pressure bin and the cotton stripping bin. This arc surface and the first partition board and the second partition board form the dividing surface between the negative-pressure bin and the cotton stripping bin. As the dust cage rotates, the fibers adsorbed on the surface of the dust cage enter the cotton stripping bin from the negative-pressure bin, are stripped by the cotton stripping scraper in the cotton stripping bin, and fall into the waste cotton bin, realizing the cleaning process of the pneumatic self-cleaning rotary dust cage. The edge of the fixed partition board between the cotton stripping bin and the waste cotton bin is sealed, and the movable partition board is installed by a sealing track.

[0010] A further technical solution thereof is that the cotton stripping bin and the waste cotton bin are connected when the compact spinning system is in operation. At this time, the movable partition board is in the open state, that is, the movable partition board is located below the fixed partition board. At this time, there is no air flow supplement inlet between the cotton stripping bin and the waste cotton bin, and a constant-pressure bin will be formed. At this time, the static pressure size is affected by the air pressure in the negative-pressure bin. This principle enables the fiber layer adsorbed on the surface of the pneumatic self-cleaning rotary dust cage to enter the cotton stripping bin from the negative-pressure bin, and the fibers are no longer affected by the air flow and are easily scraped off by the cotton stripping scraper. When the accumulated fiber waste in the waste cotton bin reaches a certain amount, manual cleaning is required.

[0011] A further technical solution thereof is that the pneumatic self-cleaning rotary dust cage includes a central shaft, side plates, multiple groups of impellers, a supporting mesh plate, a stainless-steel metal filter screen, and an edge sealing strip. The pneumatic self-cleaning rotary dust cage is fixed through the central shaft and three groups of rollers. During operation, under the action of the negative-pressure fan, the air flow enters the inside of the pneumatic self-cleaning rotary dust cage from the negative-pressure bin through the stainless-steel metal filter screen and the supporting mesh plate, and acts on the multiple groups of impellers on the pneumatic self-cleaning rotary dust cage, and then the impellers drive the pneumatic self-cleaning rotary dust cage to rotate. The rotation direction of the dust cage can be changed by changing the axial angle between the impeller and the pneumatic self-cleaning rotary dust cage.

[0012] A further technical solution thereof is that the common air duct structure of the suction negative pressure of the compact spinning and the process suction cotton negative pressure is divided into two parts, namely an inclined air duct and a horizontal air duct. The upper end of the inclined air duct is connected to the negative pressure bin of the air box, and the lower end is connected to the horizontal air duct. This structure solves the problem of large resistance in the right-angle bend of the air duct. The horizontal air duct provides negative pressure air flow for the compact spinning profiled tube and the suction cotton pipe. The horizontal air duct is installed on the wallboard of the spinning frame, between the two side car surfaces. The vertical rod base of the roving frame straddles above the horizontal air duct. The first roller seat and the second roller seat are installed on the car surface. Three adjacent holes are opened on the side of the horizontal air duct between the first roller seat and the second roller seat. The two side holes provide negative pressure for the compact spinning profiled tube. The horizontal air duct is connected to the air pipe through the first compact spinning joint and the second compact spinning joint, and then connected to the compact spinning profiled tube. The middle hole is connected to the air pipe through the pipe joint and the variable-diameter throttle pipe, and then connected to the suction cotton pipe.

[0013] A further technical solution thereof is that the cross-sectional structure of the variable-diameter throttle pipe is cylindrical, symmetric about the middle cross-section along the axis. The middle section is a circular hole with an equal diameter, and both ends are conical open structures.

[0014] The beneficial technical effects of the present invention are as follows

[0015] The single-air-duct low-energy-consumption compact spinning system of the present invention can realize the self-cleaning function of the air box and dust cage, combine the negative pressure air duct of the compact spinning and the process suction cotton air duct into one, and ensure the stability of the negative pressure, which helps to reduce energy consumption, simplify the structure of the compact spinning unit, and maintain the spinning quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Appendix Figure 1 Schematic diagram of the structure of the single-air-duct low-energy-consumption compact spinning system.

[0017] Appendix Figure 2 Front view structure schematic diagram of the self-cleaning air box in the open state of the waste cotton bin.

[0018] Appendix Figure 3 Front view structure schematic diagram of the self-cleaning air box in the closed state of the waste cotton bin.

[0019] Appendix Figure 4 Schematic diagram of the four-roller type under-suction compact spinning device.

[0020] Appendix Figure 5 Schematic diagram of the profiled tube and the pipe part.

[0021] Appendix Figure 6 Impeller type rotating dust cage.

[0022] Appendix Figure 7 Variable-diameter throttle pipe.

[0023] Appendix Figure 8 Schematic diagram of the four-roller type upper-suction compact spinning device of the second embodiment. Detailed implementation manners

[0024] The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention.

[0025] Embodiment 1

[0026] A single-duct low-energy consumption compact spinning system in this embodiment is as Figures 1 to 7 shown, including a negative pressure air box with a three-layer structure, a pneumatic self-cleaning rotary dust cage 4, a common duct for the negative pressure of compact spinning and the negative pressure of process cotton suction, and the negative pressure of compact spinning and the negative pressure of process cotton suction are distributed through a variable-diameter throttle pipe 21. The negative pressure air box includes a negative pressure chamber 1 in the upper layer, a stripping chamber 2 in the middle layer, and a waste cotton chamber 3 in the lower layer. The main body of the pneumatic self-cleaning rotary dust cage 4 is located in the negative pressure chamber 1, and the rotary surface has a certain arc length as the boundary between the negative pressure chamber 1 and the stripping chamber 2. This arc surface and the first partition plate 25 and the second partition plate 26 form a dividing surface between the negative pressure chamber 1 and the stripping chamber 2. As the dust cage rotates, the fibers adsorbed on the surface of the dust cage enter the stripping chamber 2 from the negative pressure chamber 1, are stripped off by the stripping scraper 6 in the stripping chamber 2, and fall into the waste cotton chamber 3, realizing the cleaning process of the pneumatic self-cleaning rotary dust cage 4. The edge of the fixed partition plate 701 between the stripping chamber 2 and the waste cotton chamber 3 is sealed, and the movable partition plate 702 is installed using a sealed track.

[0027] The stripping chamber 2 and the waste cotton chamber 3 are connected when the compact spinning system is in operation. At this time, the movable partition plate 702 is in the open state, that is, the movable partition plate 702 is located below the fixed partition plate 701. At this time, there is no air flow replenishment inlet between the stripping chamber 2 and the waste cotton chamber 3, and a constant pressure chamber will be formed. At this time, the static pressure size is affected by the air pressure in the negative pressure chamber 1. This principle enables the fiber layer adsorbed on the surface of the pneumatic self-cleaning rotary dust cage 4 to enter the stripping chamber 2 from the negative pressure chamber 1, and the fibers are no longer affected by the air flow and are easily scraped off by the stripping scraper 6. When the accumulated fiber waste in the waste cotton chamber 3 reaches a certain amount, manual cleaning is required. The specific process is as follows: First, place the handle 703 in the horizontal state, push the handle 703 to push out the movable partition plate 702 to separate the stripping chamber 2 from the waste cotton chamber 3, open the door 301 of the waste cotton chamber 3, take out the fiber waste in the waste cotton chamber, close the door 301 of the waste cotton chamber 3, then pull out the handle 703 to open the movable partition plate 702, and return the handle 703 to its original position.

[0028] The pneumatic self-cleaning rotary dust cage 4 described above includes a central shaft 8, side plates 403, multiple groups of impellers 401, a support mesh plate 404, a stainless steel metal filter screen 405, and an edge sealing strip 406. The pneumatic self-cleaning rotary dust cage 4 is fixed by the central shaft 8 and three groups of rollers 402. During operation, under the action of the negative pressure fan 5, the air flow enters the interior of the pneumatic self-cleaning rotary dust cage 4 from the negative pressure bin 1 through the stainless steel metal filter screen 405 and the support mesh plate 404, and acts on the multiple groups of impellers 401 on the pneumatic self-cleaning rotary dust cage 4. Then, the multiple groups of impellers 401 drive the pneumatic self-cleaning rotary dust cage 4 to rotate. The rotation direction of the dust cage can be changed by changing the axial angle between the multiple groups of impellers 401 and the pneumatic self-cleaning rotary dust cage 4.

[0029] The shared air duct structure of the compact spinning negative pressure and the process suction cotton negative pressure consists of two parts, namely an inclined air duct 9 and a horizontal air duct 10. The horizontal length range of the inclined air duct 9 is 165 mm to 350 mm. The upper end of the inclined air duct 9 is connected to the negative pressure bin 1 of the air box, and the lower end is connected to the horizontal air duct 10. This structure solves the problem of large resistance in the right-angle bend of the air duct. The height range of the horizontal air duct 10 is 185 mm to 255 mm. The horizontal air duct 10 provides negative pressure air flow for the compact spinning special-shaped tube 12 and the suction cotton pipe 14. The horizontal air duct 10 is installed on the fine spinning machine wallboard 19, located between the two side car surfaces 18, and the base of the roving frame vertical rod 17 straddles above the horizontal air duct 10. The first roller seat 15 and the second roller seat 16 are installed on the car surface 18. Three adjacent holes are opened on the side of the horizontal air duct 10 between the first roller seat 15 and the second roller seat 16. The two side holes provide negative pressure for the compact spinning special-shaped tube 12. The compact spinning special-shaped tube 12 adopts a downward air suction structure, that is, the negative pressure pipe interface of the compact spinning special-shaped tube 12 is located below the compact spinning special-shaped tube 12. At this time, the negative pressure pipes connecting the compact spinning special-shaped tube 12 and the suction cotton pipe 14 are all located below the compact spinning roller 13 and the drafting roller 11. The horizontal air duct 10 is connected to the air pipe through the compact spinning first joint 22 and the compact spinning second joint 23, and then connected to the compact spinning special-shaped tube 12. The middle hole is connected to the air pipe through the pipe joint 20 and the variable diameter throttle pipe 21, and then connected to the suction cotton pipe 14.

[0030] The cross-sectional structure of the variable diameter throttle pipe 21 is cylindrical, with a length of 60 mm, a diameter of 3 mm, symmetric about the axial middle cross-section. The middle section is a circular hole with an equal diameter, with a length of 12 mm and a diameter of 6 mm. The two ends are conical open structures, and the maximum hole diameter at the end face is 22 mm.

[0031] Embodiment 2

[0032] In this embodiment, the interface position between the compact spinning special-shaped tube 12 and the air pipe is adjusted to facilitate the adaptation to drafting devices with different structures.

[0033] A single-duct low-energy consumption compact spinning system according to this embodiment is as follows Figure 8 shown. The negative pressure pipe interface of the compact spinning profiled tube 12 is arranged on the upper surface of the compact spinning profiled tube 12, and the interface on the horizontal air duct 10 for providing negative pressure to the compact spinning profiled tube 12 is arranged on the upper surface of the horizontal air duct 10.

Claims

1. Single-duct low-energy consumption condensed spinning system, characterized by: It includes a three-layer structure of a negative pressure bellows, a pneumatic self-cleaning rotary dust cage, a common air duct for the negative pressure of concentrated spinning and the negative pressure of process cotton suction, and distributes the negative pressure of concentrated spinning and the negative pressure of process cotton suction through a variable diameter throttling pipe; the negative pressure bellows includes a negative pressure bin on the upper layer, a cotton stripping bin on the middle layer, and a cotton dropping bin on the lower layer; the main body of the pneumatic self-cleaning rotary dust cage is located in the negative pressure bin, and the rotating surface has an arc surface with a certain arc length as the boundary between the negative pressure bin and the cotton stripping bin, and the arc surface and the first partition plate and the second partition plate constitute the dividing surface between the negative pressure bin and the cotton stripping bin; As the dust cage rotates, the fibers adsorbed on the surface of the dust cage enter the stripping bin from the negative pressure bin, where they are stripped by the stripping scraper and fall into the cotton dropping bin, thus realizing the cleaning process of the pneumatic self-cleaning rotary dust cage; the edge of the fixed partition between the stripping bin and the cotton dropping bin is sealed, and the movable partition is installed on a sealed track; The shared air duct structure of the concentrated spinning negative pressure and process cotton suction negative pressure is composed of two parts, namely an inclined air duct and a horizontal air duct. The upper end of the inclined air duct is connected to the negative pressure bin of the bellows, and the lower end is connected to the horizontal air duct. This structure solves the problem of large resistance of the right-angle bend in the air duct; the horizontal air duct provides negative pressure airflow for the concentrated spinning special-shaped tube and the cotton suction flute tube. The horizontal air duct is installed on the wall panel of the spinning frame and is located between the two sides of the car surface. The base of the coarse yarn frame vertical rod straddles above the horizontal air duct; the first roller seat and the second roller seat are installed on the car surface; three adjacent holes are opened on the side of the horizontal air duct between the first roller seat and the second roller seat, and the holes on both sides provide negative pressure for the concentrated spinning special-shaped tube. The horizontal air duct is connected to the air pipe through the concentrated spinning first joint and the concentrated spinning second joint, and then connected to the concentrated spinning special-shaped tube; the middle hole is connected to the air pipe through the flute tube joint and the variable diameter throttling tube, and then connected to the cotton suction flute tube.

2. The single-duct low-energy consumption condensed spinning system according to claim 1, characterized in that: The cotton stripping bin and the cotton dropping bin are connected when the concentrated spinning system is in working state. At this time, the movable partition is in the open state, that is, the movable partition is located below the fixed partition. At this time, there is no air flow supplement inlet between the cotton stripping bin and the cotton dropping bin, and a constant pressure bin will be formed. At this time, the static pressure is affected by the air pressure in the negative pressure bin. This principle allows the fiber layer adsorbed on the surface of the pneumatic self-cleaning rotary dust cage to enter the cotton stripping bin from the negative pressure bin. The fibers are no longer affected by the air flow and are easily scraped off by the cotton stripping scraper. When the fiber waste accumulated in the cotton dropping bin reaches a certain amount, manual cleaning is required.

3. The single-duct low-energy consumption condensed spinning system according to claim 1, characterized in that: The pneumatic self-cleaning rotary dust cage comprises a central axis, a side plate, multiple groups of impellers, a supporting mesh plate, a stainless steel metal filter and an edge sealing strip; the pneumatic self-cleaning rotary dust cage is fixed by the central axis and three groups of rollers. When working, the airflow enters the interior of the pneumatic self-cleaning rotary dust cage from the negative pressure bin through the stainless steel metal filter and the supporting mesh plate under the action of the negative pressure fan, and acts on the multiple groups of impellers on the pneumatic self-cleaning rotary dust cage, and then the pneumatic self-cleaning rotary dust cage is driven to rotate by the multiple groups of impellers; the axial angle between the multiple groups of impellers and the pneumatic self-cleaning rotary dust cage can be changed to change the rotation direction of the dust cage.

4. The single-duct low-energy consumption condensed spinning system according to claim 1, characterized in that: The cross-sectional structure of the variable diameter throttling pipe is cylindrical, symmetrical along the axial middle cross-section, the middle section is a circular hole with equal diameter, and both ends are conical open structures.

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