High efficiency compact spinning device and spinning method

Abstract

The patent provides a high-efficiency condensing spinning device and spinning method. A condensing pipe is arranged at the front of a drafting system, a condensing opening is formed on the upper side of the condensing pipe, a rotating driving roller is arranged at the lower part of the condensing pipe, a lower condensing ring is sleeved and tensioned between the condensing pipe and the driving roller, left and right horizontal condensing rings in vertical state are arranged on the condensing rings located at the left and right sides of the condensing opening, and an upper stable condensing ring is arranged at the top of the left and right horizontal condensing rings. The lower condensing ring, the left horizontal condensing ring, the right horizontal condensing ring and the upper stable condensing ring form a sliver condensing channel, so that the sliver in the condensing channel is subjected to the horizontal mechanical condensing effect and the horizontal negative pressure condensing effect of the left and right horizontal condensing rings and the longitudinal stable condensing effect of the upper stable condensing ring, thereby effectively improving the condensing effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ring spinning, in particular to a high-efficiency compact spinning device and a spinning method. BACKGROUND

[0002] Compact spinning, also known as compact spinning, is a new type of spinning technology on an improved ring spinning machine, which improves the quality of the yarn by adding a fiber condensation zone before the traction device of the ring spinning machine. At present, the main types of compact spinning used internationally include mesh ring type (mainly including German Sussen three-roller mesh ring type and Japanese Toyota four-roller mesh ring type), roller type (Swiss Rieter COM4), punched apron type (mainly including Zinser punched apron type), and mechanical type (mainly including Swiss Roscraft magnetic compact spinning system). The mesh ring type, roller type, and punched apron type belong to the negative pressure airflow condensation mode. Among them, the Roscraft mechanical compact spinning system has poor variety adaptability (generally only suitable for spinning yarn below 60Ne) and is less used in China at present. The Zinser punched apron type has poor variety adaptability (generally only suitable for wool spinning) and needs to be imported as a whole machine, which is expensive (average 1500 yuan per spindle), so its use scale is small in China. Therefore, the mesh ring type compact spinning system currently occupies the mainstream market, but it generally has problems such as high modification and maintenance cost, high energy consumption, and difficult control of condensation effect.

[0003] In view of this, the present application provides a high-efficiency compact spinning device and a spinning method. A hollow and stationary condensation pipe is arranged at the front of the drafting system, left and right transverse condensation rings and an upper stable condensation ring are arranged on the condensation pipe, to realize stable condensation of the sliver output by the drafting system, thereby improving the overall quality of the yarn. SUMMARY

[0004] The present application provides a high-efficiency compact spinning device and a spinning method. By arranging a condensation channel composed of a left transverse condensation ring, a right transverse condensation ring, a lower condensation ring, and an upper stable condensation ring, the sliver in the condensation channel is subjected to transverse mechanical gathering action of the left and right transverse condensation rings, and at the same time, subjected to transverse negative pressure condensation action of the transverse condensation airflow formed by the left and right transverse condensation rings entering the condensation port. In the process of transverse mechanical gathering action and transverse negative pressure condensation action, the sliver is simultaneously subjected to longitudinal stable condensation action of the pressing condensation airflow formed by the upper stable condensation ring entering the condensation port, thereby effectively improving the condensation effect.

[0005] To achieve the above object, the application relates to a high-efficiency cluster spinning device, which comprises a front car platform and a rear car platform which are completely identical in structure, the front car platform and the rear car platform each comprise 200-500 spindle positions which are identical in structure and arranged horizontally along the length direction, each spindle position comprises a drafting system, the drafting system comprises, from back to front along the movement direction of fibers in the drafting system, a rear drafting roller pair, a middle drafting roller pair and a front drafting roller pair, the rear drafting roller pair, the middle drafting roller pair and the front drafting roller pair are identical in structure and comprise an upper drafting rubber roller and a lower drafting roller, the upper drafting rubber roller comprises a rubber roller shaft which is a solid cylindrical structure made of steel, the rubber roller shafts of adjacent two spindle positions are integrally connected, rubber roller sleeves made of rubber are respectively sleeved on the left side and the right side of the outer circumference of the rubber roller shaft, the rubber roller sleeves are connected with the rubber roller shaft through rolling bearing structures, so that the rubber roller sleeves can freely rotate around the rubber roller shaft, the rubber roller shaft between the two rubber roller sleeves is embedded in an embedding claw of a pressing assembly, so that the upper pressing rubber roller is installed and fixed, the middle parts of the rubber roller shafts of the upper drafting rubber rollers of the rear drafting roller pair, the middle drafting roller pair and the front drafting roller pair are respectively embedded in rear, middle and front embedding claws of the pressing assembly, the lower drafting roller comprises a drafting roller shaft which is a solid cylindrical structure made of steel, the drafting roller shafts of 6-8 spindle positions are integrally fixed and connected, a roller seat is arranged between adjacent two drafting roller shafts, adjacent two roller shafts are transmissionally connected with corresponding roller seats, so that the drafting roller shafts of all spindle positions are kept in a transmission state and are connected with each other, a drafting roller sleeve is sleeved on the outer circumference of the drafting roller shaft of each spindle position, the drafting roller sleeve is made of the same material as the drafting roller shaft, the drafting roller sleeve is integrally fixed and connected with the drafting roller shaft, strip-shaped grooves are formed on the length direction of the side outer circumference of the drafting roller sleeve at equal intervals, a cluster pipe is arranged at the front part of the front drafting roller pair, the cluster pipe is a hollow structure, the cluster pipe keeps a static state, the cluster pipe is fixedly connected with the car platform at both ends, the cluster pipe penetrates all spindle positions, a cluster opening is formed on the upper side of the cluster pipe at each spindle position, the cluster opening is a T-shaped structure, the rear end of the cluster opening comprises left and right symmetrical left rear gathering openings and right rear gathering openings, the front end of the cluster opening is a trapezoidal mechanism with a gradually decreasing diameter from back to front, the front end of the cluster opening is in communication with the front side edges of the left rear gathering opening and the right rear gathering opening, a negative pressure inlet is arranged on the cluster pipe between adjacent two spindle positions, the negative pressure inlet is a circular structure, a negative pressure branch pipe is in communication with the negative pressure inlet, the other end of the negative pressure branch pipe is in communication with a negative pressure main pipe, the negative pressure main pipe is arranged along the length direction, the negative pressure main pipe comprises parallelly arranged first and second negative pressure main pipes, one end of the first and second negative pressure main pipes is open and in communication with a negative pressure air bellow, the negative pressure air bellow is a long rectangular hollow structure, a negative pressure fan is arranged in the negative pressure air bellow, a long rectangular blocking plate is also arranged in the negative pressure air bellow and is fixedly connected with the inner side of the negative pressure air bellow.Thus, the negative pressure fan is located in the negative pressure box, a circular filter screen hole is opened on the blocking plate, a filter screen is arranged in the filter screen hole, the filter screen is in a circular structure, a fixing ring is arranged on the outer circumference of the filter screen, and the outer circumference of the filter screen is fixedly connected with the fixing ring, so that the filter screen and the fixing ring are in tension connection, the fixing ring is connected with the inner side of the side of the filter screen hole facing the cleaning box through a bearing, the fixing ring is driven to rotate through a corresponding transmission mechanism, so that the filter screen rotates around the filter screen hole, a closing piece is arranged on the side of the filter screen hole facing the negative pressure box, the closing piece is in a semicircular structure and is in a whole air-tight structure, the closing piece is fixedly connected with the inner side of the filter screen hole, a first negative pressure pipe connecting port and a second negative pressure pipe connecting port are opened on the side of the cleaning box facing the first negative pressure main pipe and the second negative pressure main pipe, the first negative pressure pipe connecting port is in intercommunication connection with the first negative pressure main pipe, the second negative pressure pipe connecting port is in intercommunication connection with the second negative pressure main pipe, the negative pressure branch pipes on the front vehicle table are in intercommunication connection with the first negative pressure main pipe and the second negative pressure main pipe in turn and staggeredly, that is, one negative pressure branch pipe on the front vehicle table is in intercommunication connection with the first negative pressure main pipe, and another negative pressure branch pipe adjacent to the one negative pressure branch pipe on the front vehicle table is in intercommunication connection with the second negative pressure main pipe, the negative pressure branch pipes on the rear vehicle table are in intercommunication connection with the first negative pressure main pipe and the second negative pressure main pipe in turn and staggeredly, that is, one negative pressure branch pipe on the rear vehicle table is in intercommunication connection with the first negative pressure main pipe, and another negative pressure branch pipe adjacent to the one negative pressure branch pipe on the rear vehicle table is in intercommunication connection with the second negative pressure main pipe, a cleaning air suction port is opened on one side of the negative pressure box, the cleaning air suction port is in intercommunication connection with a cleaning pipe, and the cleaning pipe is in intercommunication connection with the cotton suction dropper.

[0006] A driving roller is arranged below the collecting pipe, the driving roller is a solid structure in the shape of a cylinder, the driving roller penetrates all the spindles, a left bearing is sleeved on the left end of the driving roller, the left bearing is connected between the driving roller and the table surface through a left connecting piece, so that the connection between the left end of the driving roller and the table surface is realized, a right bearing is sleeved on the right end of the driving roller, the right bearing is connected between the driving roller and the table surface through a right connecting piece, so that the connection between the right end of the driving roller and the table surface is realized, a tension roller is arranged in the area between the driving roller and the collecting pipe, the tension roller is a solid structure in the shape of a cylinder, the tension roller penetrates all the spindles, the left end of the tension roller is connected between the tension roller and the table surface through a left elastic connecting piece, so that the connection between the left end of the tension roller and the table surface is realized, the right end of the tension roller is connected between the tension roller and the table surface through a right elastic connecting piece, so that the connection between the right end of the tension roller and the table surface is realized, the left elastic connecting piece and the right elastic connecting piece are the same in structure and are both tensile spring structures in the shape of a ring, a lower collecting ring is sleeved on the collecting pipe, the tension roller and the driving roller, the lower collecting ring is a ring structure, the lower collecting ring comprises a lower middle collecting ring, a left lower fixed ring and a right lower fixed ring, the lower middle collecting ring is located at the middle part of the width of the lower collecting ring, the left lower fixed ring is located at the left side of the lower middle collecting ring, the right lower fixed ring is located at the right side of the lower middle collecting ring, the left lower fixed ring and the right lower fixed ring are symmetrically distributed about the lower middle collecting ring, the left lower fixed ring and the right lower fixed ring are the same in structure and are both made of air-tight rubber material, the lower middle collecting ring is a smooth woven fabric woven by warp yarns and weft yarns, the warp yarns and the weft yarns are both chemical fiber filaments, so that the warp yarns and the weft yarns of the woven lower middle collecting ring maintain certain and uniformly distributed pores, the inner side of the ring-shaped lower collecting ring is in contact with the upper side of the collecting pipe and the lower middle collecting ring completely covers the collecting opening, the inner side of the ring-shaped lower collecting ring passes around the tension roller, at this time, the left elastic connecting piece and the right elastic connecting piece adaptively adjust the tension between the tension roller and the lower collecting ring through the compression elasticity of the left elastic connecting piece and the right elastic connecting piece respectively, so that the adaptive tensioning effect of the lower collecting ring is realized, the inner side of the ring-shaped lower collecting ring passes around the driving roller, the left end or the right end of the driving roller drives rotation through the corresponding transmission mechanism, thereby driving the corresponding rotation of the lower collecting ring, a left transverse collecting ring is arranged at the left side of the upper part of the collecting opening of the lower collecting ring, a right transverse collecting ring is arranged at the right side of the upper part of the collecting opening of the lower collecting ring, the left transverse collecting ring and the right transverse collecting ring are the same in structure, the left transverse collecting ring and the right transverse collecting ring are arranged in the vertical direction, the left transverse collecting ring and the right transverse collecting ring maintain a vertical state with the lower collecting ring, the material of the left transverse collecting ring and the right transverse collecting ring is the same as that of the lower middle collecting ring, the left transverse collecting ring and the right transverse collecting ring are smooth woven fabrics woven by warp yarns and weft yarns, the warp yarns and the weft yarns are both chemical fiber filaments, and the linear density of the chemical fiber filaments used in the left transverse collecting ring and the right transverse collecting ring is greater than that of the chemical fiber filaments used in the lower middle collecting ring.Thus, the warp and weft yarns of the lower left and right lateral gathering loops woven together maintain certain and uniformly distributed apertures, the apertures of the left and right lateral gathering loops have a larger diameter than the apertures of the lower middle gathering loop, the thickness of the left and right lateral gathering loops is greater than the thickness of the lower middle gathering loop, the distance between the left and right lateral gathering loops is smaller than the width of the drafted output strand, the left and right lateral gathering loops form a lateral gathering channel with a constant width, the lower gathering loop on the left side of the left lateral gathering loop is a left lower fixed loop, the lower gathering loop on the right side of the right lateral gathering loop is a right lower fixed loop, an upper stable gathering loop is arranged on the upper part of the left and right lateral gathering loops, the left side of the upper stable gathering loop is integrally fixedly connected with the upper side of the left lateral gathering loop, the right side of the upper stable gathering loop is integrally fixedly connected with the upper side of the right lateral gathering loop, the material of the upper stable gathering loop is the same as that of the lower middle gathering loop, the upper stable gathering loop is directly formed by 2-4 layers of stable gathering single-layer loops which are directly staggered and overlapped, the structure and material of the stable gathering single-layer loop are the same as those of the lower middle gathering loop, thus, the apertures between the warp and weft yarns of the stable gathering single-layer loop have the same diameter as the apertures between the warp and weft yarns of the lower middle gathering loop, the apertures between the warp and weft yarns of the stable gathering single-layer loop are staggered and overlapped during the overlapping of the stable gathering single-layer loops, thus, the diameter of the apertures of the upper stable gathering loop formed after the overlapping is smaller than that of the lower middle gathering loop, the thickness of the upper stable gathering loop is greater than that of the lower middle gathering loop, the left side of each stable gathering single-layer loop in the upper stable gathering loop after the staggering and overlapping is integrally fixedly connected with the left lateral gathering loop, and the right side of each stable gathering single-layer loop is integrally fixedly connected with the right lateral gathering loop, thus, the stable gathering single-layer loops in the upper stable gathering loop after the overlapping are fixed, and then the stable gathering single-layer loops are effectively overlapped without using any intermediate adhesive, the lower middle gathering loop, the left and right lateral gathering loops and the upper stable gathering loop form a complete gathering channel for gathering the drafted strand, an output lower roller is arranged at the front part of the gathering tube, the output lower roller comprises an output lower roller shaft, the output lower roller shaft is a solid cylindrical structure, the material of the output lower roller shaft is iron or steel, the output lower roller shaft penetrates all the spindles, the left end of the output lower roller shaft is fixedly connected with the left end of the gathering tube through a left fixed rod, the right end of the output lower roller shaft is fixedly connected with the right end of the gathering tube through a right fixed rod, thus, the output lower roller shaft and the gathering tube maintain a certain distance, an output lower roller sleeve is arranged at each spindle on the output lower roller shaft, the output lower roller sleeve is an annular structure, the material of the output lower roller sleeve is the same as that of the output lower roller shaft, the output lower roller sleeve is sleeved on the output lower roller shaft through a bearing, the output lower roller sleeve and the gathering tube still maintain a certain distance, and the output lower roller sleeve can freely rotate around the output lower roller shaft, an output upper roller is arranged above the output lower roller, the output upper roller comprises an output upper roller shaft, the output upper roller shaft is a solid cylindrical structure,The material of the output upper roller shaft is iron or steel, and the two adjacent output upper roller shafts in the two adjacent ingot positions are integrally fixedly connected. The output upper roller sleeve is arranged at the position of the left ingot position of the output upper roller shaft and at the position of the right ingot position of the output upper roller shaft. The output upper roller sleeve is annular in structure and is made of hard rubber. The output upper roller sleeve is sleeved on the output upper roller shaft through a bearing, so that the output upper roller sleeve can freely rotate around the output upper roller shaft. The independent embedding claw is arranged at the front of the pressing assembly. The independent embedding claw is connected with the pressing assembly through the embedding claw connecting rod. When the pressing assembly is pressed down, the corresponding pressure is transmitted to the independent embedding claw through the embedding claw connecting rod. Part of the two output upper roller sleeves of the output upper roller shaft is embedded in the independent embedding claw, so that the connection between the output upper roller and the pressing assembly is realized, and then the fixed installation of the output upper roller is realized. The connecting gear box is arranged on one side of the embedding claw connecting rod, and the connecting gear is arranged in the connecting gear box, so that the transmission connection between the rubber sleeve of the upper stretching rubber roller of the front stretching roller pair and the output upper roller sleeve of the output upper roller is realized.

[0007] The application also relates to a high-efficiency cluster spinning method, wherein short fiber roving with a certain twist is fed into a drafting system through a pair of back drafting rollers, a pressing assembly is pressed down at this time, so that the rubber sleeve of the upper drafting rubber roller of the pair of back drafting rollers and the roller sleeve of the lower drafting roller are kept in close pressing contact, so that a back feeding nip is formed between the two, the upper drafting rubber roller is passively rotated by the active rotation of the lower drafting roller, the rubber sleeve of the upper drafting rubber roller of the pair of middle drafting rollers and the roller sleeve of the lower drafting roller are kept in close pressing contact, so that a middle transition nip is formed between the two, the upper drafting rubber roller is passively rotated by the active rotation of the lower drafting roller, the rubber sleeve of the upper drafting rubber roller of the pair of front drafting rollers and the roller sleeve of the lower drafting roller are kept in close pressing contact, so that a front output nip is formed between the two, the upper output roller sleeve and the lower output roller sleeve are kept in close pressing contact, the rubber sleeve of the upper drafting rubber roller of the pair of front drafting rollers is rotated, the upper output roller sleeve is rotated through a bridge gear, the upper output roller sleeve is rotated, the lower output roller sleeve is rotated, a twist-resistant output nip is formed between the two, the short fiber roving is continuously fed into the drafting system through the back feeding nip, the fed short fiber roving is driven by the middle transition nip, so that a back drafting action is formed between the pair of back drafting rollers and the pair of middle drafting rollers, the fed short fiber roving is continuously fed into the drafting system through the back feeding nip, the fed short fiber roving is driven by the middle transition nip, so that a back drafting action is formed between the pair of back drafting rollers and the pair of middle drafting rollers, the fibers in the short fiber roving are gradually stretched under the action of the drafting force, the fibers are gradually straightened in the stretching process, the cohesion between the fibers is reduced in the straightening process, so that a certain slippage occurs between the fibers, the linear density of the fed short fiber roving is reduced, so that a back drafting sliver is obtained, the back drafting sliver is continuously output through the middle transition nip, the output back drafting sliver is driven by the front output nip, so that a front drafting action is formed between the pair of middle drafting rollers and the pair of front drafting rollers, the fibers in the back drafting sliver are gradually stretched under the action of the drafting force, the fibers are gradually straightened in the stretching process, the cohesion between the fibers is reduced in the straightening process, so that a certain slippage occurs between the fibers, the linear density of the fed back drafting sliver is reduced, so that a front drafting sliver is obtained, the front drafting sliver is continuously output through the front output nip, the continuously output front drafting sliver is continuously output through the twist-resistant output nip.The front tugging sliver between the front output nip and the blocking output nip is subjected to the gathering effect of the gathering zone. In the gathering zone, the negative pressure generated by the negative pressure fan enters the cleaning box through the filter screen not blocked by the blocking piece, and then enters the first negative pressure main pipe through the first negative pressure pipe connection port on the cleaning box and the second negative pressure pipe connection port, and the negative pressure in the first negative pressure main pipe and the second negative pressure main pipe enters the gathering pipe through the corresponding negative pressure branch pipe and the negative pressure inlet in sequence, thereby forming a gathering airflow flow from the outside to the gathering pipe through the negative pressure inlet. Under the driving action of the gathering airflow flow, the airflow from the outside into the gathering pipe enters the cleaning box through the negative pressure branch pipe and the negative pressure main pipe in sequence. In the process of the outside airflow flowing in, part of the loose fibers in the front tugging sliver are also brought in, so that the brought-in loose fibers are continuously accumulated on the filter screen not blocked by the blocking piece. Due to the airflow flow, the fibers are tightly attached to the filter screen. With the rotation of the filter screen, when the part of the filter screen where the fibers are accumulated rotates to be blocked by the blocking piece, the airflow flow disappears due to the blocking of the blocking piece, and then the tight attachment between the fibers and the filter screen disappears, so that the fibers slide down along the filter screen under the action of their own gravity, thereby realizing the automatic cleaning effect of the filter screen.

[0008] The left end or the right end of the driving roller drives rotation through the corresponding transmission mechanism, and then drives the lower gathering ring to rotate around the gathering pipe and the tension roller, and then drives the left and right horizontal gathering rings and the upper stable gathering ring fixedly connected with the lower gathering ring to rotate synchronously. In the rotation process, the tension roller self-adapts the tension between the tension roller and the lower gathering ring through the compression elasticity of each tension roller, thereby realizing the self-adaptive tensioning of the lower gathering ring in the rotation process. The continuously output front draft tow enters the gathering channel. In the gathering channel, the linear speed of the lower gathering ring, the left and right horizontal gathering rings and the upper stable gathering ring is consistent with the conveying speed of the front draft tow, so that the front draft tow in the gathering channel is not affected by the friction force, thereby realizing the stable and consistent gathering of the front draft tow. The front draft tow entering the gathering channel is first subjected to the mechanical gathering effect of the left and right horizontal gathering rings. Under the mechanical gathering effect, the relatively loose front draft tow is immediately gathered, so that the fibers in the front draft tow are rapidly changed from the initial dispersed and flat state with a certain spacing to the flat state with close contact, thereby realizing the horizontal mechanical gathering of the front draft tow. The mechanically gathered front draft tow then immediately enters the horizontal gathering channel. In the horizontal gathering channel, under the driving of the gathering airflow, the external airflow forms the left horizontal gathering airflow which enters the gathering pipe through the negative pressure inlet after the left horizontal gathering ring and the lower middle gathering ring, and simultaneously forms the right horizontal gathering airflow which enters the gathering pipe through the negative pressure inlet after the right horizontal gathering ring and the lower middle gathering ring. Under the joint action of the left and right horizontal gathering airflows, the fibers in the front draft tow are gathered to the center of the tow, thereby realizing the horizontal airflow gathering of the front draft tow. In the horizontal airflow gathering process, the left horizontal gathering airflow enters the gathering pipe through the left rear gathering port, and the right horizontal gathering airflow enters the gathering pipe through the right rear gathering port. Under the joint action of the left and right horizontal gathering airflows in this process, the fibers in the front draft tow are rapidly gathered to the center of the tow, and then the fibers are continuously extruded to the center of the tow, so that the front draft tow is changed from the flat state of fiber distribution to the space state of approximately cylindrical shape formed by the mutual stacking of fibers. Then, the left horizontal gathering airflow enters the gathering pipe through the front port of the gathering port, and the right horizontal gathering airflow enters the gathering pipe through the front port of the gathering port. Under the joint action of the left and right horizontal gathering airflows in this process, the fibers in the front draft tow continue to be gathered to the center of the tow, so that the fibers continue to be continuously extruded to the center of the tow, thereby making the fiber distribution in the front draft tow more close to the cylindrical shape, and then realizing the gradual horizontal gathering of the front draft tow.The outside airflow is formed into the auxiliary gathering airflow which enters into the gathering tube through the negative pressure inlet in sequence from the upper stable gathering ring, the lower middle gathering ring, under the driving of the airflow flow, under the action of the auxiliary gathering airflow, the fiber in the front drafting sliver is pressed, so that the fiber in the front drafting sliver does not interwind or turn over in the gathering process, and then the stable parallel transverse gathering of the front drafting sliver is realized, since the aperture of the left and right transverse gathering rings is larger than that of the lower middle gathering ring, so that more than 80% of the gathering airflow flow is used to generate the left and right transverse gathering airflow, and since the aperture of the upper stable gathering ring is smaller than that of the lower middle gathering ring, so that less than 20% of the gathering airflow flow is used to generate the auxiliary gathering airflow, and the auxiliary gathering airflow is more uniformly applied to the upper part of the front drafting sliver, so that the distribution and coordination between the transverse gathering and the auxiliary gathering are realized, the front drafting sliver after the gathering is continuously output through the output twisting output jaw, and the front drafting sliver after the output is twisted to obtain the required yarn with certain strength, and the yarn is synchronously wound on the yarn tube in the twisting process.

[0009] The patent is characterized in that the hollow and stationary gathering tube is arranged at the front part of the drafting system, the gathering port is arranged on the upper side of the gathering tube, the rotating driving roller is arranged at the lower part of the gathering tube, the lower gathering ring is sleeved and tensioned between the gathering tube and the driving roller, the left and right transverse gathering rings which are consistent with the material of the gathering ring and are arranged in the vertical state are arranged on the left and right sides of the gathering port, the upper stable gathering ring which is consistent with the material of the gathering ring is arranged at the top of the left and right transverse gathering rings, so that the lower gathering ring, the left and right transverse gathering rings and the upper stable gathering ring form the sliver gathering channel, and then the sliver in the gathering channel is subjected to the transverse mechanical gathering of the left and right transverse gathering rings and the transverse negative pressure gathering of the transverse gathering airflow formed by the left and right transverse gathering rings into the gathering port, and is subjected to the longitudinal stable gathering of the pressing gathering airflow formed by the upper stable gathering ring into the gathering port at the same time in the process of the transverse mechanical gathering and the transverse negative pressure gathering, so that the gathering effect is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a structure schematic diagram of the high-efficiency gathering spinning device.

[0011] Figure 2 Schematic diagram of the negative pressure wind box structure of the present application.

[0012] Wherein, 1, the back drafting roller pair, 2, the middle drafting roller pair, 3, the front drafting roller pair, 4, the condensing tube, 5, the lower middle condensing ring, 6, the driving roller, 7, the left transverse condensing ring, 8, the right transverse condensing ring, 9, the condensing port, 10, the right lower fixed ring, 11, the left lower fixed ring, 12, the right fixed rod, 13, the left fixed rod, 14, the output upper roller, 15, the output lower roller, 16, the negative pressure wind box, 17, the negative pressure box, 18, the cleaning box, 19, the negative pressure fan, 20, the blocking plate, 21, the filter screen hole, 22, the fixed ring, 23, the filter screen, 24, the closing piece, 25, the first negative pressure pipe connecting port, 26, the second negative pressure pipe connecting port, 27, the cleaning suction port DETAILED DESCRIPTION

[0013] As shown in Figure 1 , an efficient condensing spinning device, comprising a front car platform and a rear car platform which are completely identical in structure, the front car platform and the rear car platform respectively comprising 200-500 identical spindle positions arranged horizontally along the length direction, each spindle position comprising a drafting system, the drafting system comprising, from back to front along the movement direction of the fiber in the drafting system, a back drafting roller pair 1, a middle drafting roller pair 2, and a front drafting roller pair 3, the back drafting roller pair, the middle drafting roller pair, and the front drafting roller pair being identical in structure and comprising an upper drafting rubber roller and a lower drafting roller, the upper drafting rubber roller comprising a rubber roller shaft which is a solid cylindrical structure made of steel, the rubber roller shafts of adjacent two spindle positions being integrally connected, rubber roller sleeves being respectively sleeved on the left side and the right side of the outer circumference of the rubber roller shaft, the rubber roller sleeves being made of rubber, the rubber roller sleeves being connected with the rubber roller shafts through rolling bearing structures so that the rubber roller sleeves can freely rotate around the rubber roller shafts, the rubber roller shafts between the two rubber roller sleeves being embedded in the embedding claws of a pressing assembly to realize the installation and fixation of the upper pressing rubber roller, the middle parts of the rubber roller shafts of the upper drafting rubber rollers of the back drafting roller pair, the middle drafting roller pair, and the front drafting roller pair being respectively embedded in the back, middle, and front embedding claws of the pressing assembly, the lower drafting roller comprising a drafting roller shaft which is a solid cylindrical structure made of steel, the drafting roller shafts of 6-8 spindle positions being integrally fixedly connected, a roller seat being arranged between adjacent two drafting roller shafts, adjacent two roller shafts being transmissionally connected with the corresponding roller seat, so as to realize the mutual connection between all the drafting roller shafts of the spindle positions in a transmission state, a drafting roller sleeve being sleeved on the outer circumference of the drafting roller shaft of each spindle position, the drafting roller sleeve being completely identical in material with the drafting roller shaft, the drafting roller sleeve being integrally fixedly connected with the drafting roller shaft, strip-shaped grooves being opened on the length direction of the side outer circumference of the drafting roller sleeve at equal intervals.

[0014] The front of the front drafting roller pair is provided with a gathering pipe 4, which is a hollow structure, keeps static state, is fixedly connected between the car platform and both ends of the gathering pipe, penetrates all spindle positions, and has a gathering port 9 on the upper side of the gathering pipe at each spindle position. The gathering port is a T-shaped structure, the rear end of the gathering port includes left and right symmetrical left and right rear gathering ports, the front end of the gathering port is a trapezoidal mechanism with a gradually decreasing diameter from rear to front, the front end of the gathering port is connected with the front side of the left and right rear gathering ports, a negative pressure inlet is arranged on the gathering pipe between adjacent two spindle positions, the negative pressure inlet is a circular structure, a negative pressure branch pipe is connected with the negative pressure inlet, the other end of the negative pressure branch pipe is connected with a negative pressure main pipe, the negative pressure main pipe is arranged along the length direction, the negative pressure main pipe includes a first negative pressure main pipe and a second negative pressure main pipe arranged in parallel, one end of the first negative pressure main pipe and the second negative pressure main pipe is open and connected with a negative pressure air bellow, the negative pressure air bellow 16 is a rectangular hollow structure, a negative pressure fan 19 is arranged in the negative pressure air bellow, a rectangular blocking plate 20 is arranged in the negative pressure air bellow, the blocking plate is fixedly connected with the inner side of the negative pressure air bellow, so as to divide the negative pressure air bellow into a negative pressure box 17 and a cleaning box 18, the negative pressure fan is arranged in the negative pressure box, a circular filter screen hole 21 is arranged on the blocking plate, a filter screen 23 is arranged in the filter screen hole, the filter screen is a circular structure, a fixing ring 22 is arranged on the outer side of the filter screen, the outer side of the filter screen is fixedly connected with the fixing ring, so as to realize the tension connection between the filter screen and the fixing ring, the fixing ring is connected with the inner side of the filter screen hole on the side of the cleaning box through a bearing, the fixing ring is driven to rotate through a corresponding transmission mechanism, so as to make the filter screen rotate around the filter screen hole, a closing piece 24 is arranged on the side of the filter screen hole facing the negative pressure box, the closing piece is a semicircular structure and keeps a whole non-breathable structure, the closing piece is fixedly connected with the inner side of the filter screen hole, a first negative pressure pipe connecting port 25 and a second negative pressure pipe connecting port 26 are arranged on the side of the cleaning box facing the first negative pressure main pipe and the second negative pressure main pipe, the first negative pressure pipe connecting port is connected with the first negative pressure main pipe, the second negative pressure pipe connecting port is connected with the second negative pressure main pipe, the negative pressure branch pipes on the front car platform are connected with the first negative pressure main pipe and the second negative pressure main pipe in turn and staggered, that is, one negative pressure branch pipe on the front car platform is connected with the first negative pressure main pipe, and the other negative pressure branch pipe on the front car platform adjacent to the one is connected with the second negative pressure main pipe, the negative pressure branch pipes on the rear car platform are connected with the first negative pressure main pipe and the second negative pressure main pipe in turn and staggered, that is, one negative pressure branch pipe on the rear car platform is connected with the first negative pressure main pipe, and the other negative pressure branch pipe on the rear car platform adjacent to the one is connected with the second negative pressure main pipe, a cleaning air suction port 27 is arranged on the side of the negative pressure box, the cleaning air suction port is connected with a cleaning pipe, and the cleaning pipe is connected with a suction cotton dropper.

[0015] A driving roller 6 is arranged below the collecting tube. The driving roller is a solid cylindrical structure. The driving roller penetrates all spindles. A left bearing is sleeved on the left end of the driving roller. The left bearing is connected between the driving roller and the table surface through a left connecting piece, so as to realize the connection between the left end of the driving roller and the table surface. A right bearing is sleeved on the right end of the driving roller. The right bearing is connected between the driving roller and the table surface through a right connecting piece, so as to realize the connection between the right end of the driving roller and the table surface. A tension roller is arranged in the area between the driving roller and the collecting tube. The tension roller is a solid cylindrical structure. The tension roller penetrates all spindles. The left end of the tension roller is connected between the tension roller and the table surface through a left elastic connecting piece, so as to realize the connection between the left end of the tension roller and the table surface. The right end of the tension roller is connected between the tension roller and the table surface through a right elastic connecting piece, so as to realize the connection between the right end of the tension roller and the table surface. The left elastic connecting piece and the right elastic connecting piece are of the same structure and are annular tension spring structures. A lower collecting ring is sleeved on the collecting tube, the tension roller and the driving roller. The lower collecting ring is an annular structure. The lower collecting ring comprises a lower middle collecting ring 5, a left lower fixed ring 11 and a right lower fixed ring 10. The lower middle collecting ring is located at the middle part of the width of the lower collecting ring. The left lower fixed ring is located at the left side of the lower middle collecting ring. The right lower fixed ring is located at the right side of the lower middle collecting ring. The left lower fixed ring and the right lower fixed ring are symmetrically distributed about the lower middle collecting ring. The left lower fixed ring and the right lower fixed ring are of the same structure and are both of air-tight rubber material. The lower middle collecting ring is a smooth woven fabric woven by warp yarns and weft yarns. The warp yarns and the weft yarns are both chemical fiber filaments, so that the warp yarns and the weft yarns of the woven lower middle collecting ring maintain certain and uniformly distributed pores. The inner side of the annular lower collecting ring is in contact with the upper side of the collecting tube and the lower middle collecting ring completely covers the collecting port 9. The inner side of the annular lower collecting ring passes around the tension roller. At this time, the left elastic connecting piece and the right elastic connecting piece adaptively adjust the tension between the tension roller and the lower collecting ring through the compression elasticity of the left elastic connecting piece and the right elastic connecting piece, so as to realize the adaptive tensioning effect of the lower collecting ring. The inner side of the annular lower collecting ring passes around the driving roller. The left end or the right end of the driving roller drives rotation through the corresponding transmission mechanism, thereby driving the corresponding rotation of the lower collecting ring. A left transverse collecting ring 7 is arranged at the left side of the upper part of the collecting port of the lower collecting ring. A right transverse collecting ring 8 is arranged at the right side of the upper part of the collecting port of the lower collecting ring. The left transverse collecting ring and the right transverse collecting ring are of the same structure. The left transverse collecting ring and the right transverse collecting ring are arranged in the vertical direction. The left transverse collecting ring and the right transverse collecting ring maintain a vertical state with the lower collecting ring. The material of the left transverse collecting ring and the right transverse collecting ring is the same as that of the lower middle collecting ring. The left transverse collecting ring and the right transverse collecting ring are smooth woven fabrics woven by warp yarns and weft yarns. The warp yarns and the weft yarns are both chemical fiber filaments. The linear density of the chemical fiber filaments used in the left transverse collecting ring and the right transverse collecting ring is greater than that of the chemical fiber filaments used in the lower middle collecting ring.Thus, the warp yarns and weft yarns of the lower left lateral gathering ring and the right lateral gathering ring woven together maintain certain and uniformly distributed apertures, the aperture diameter of the left lateral gathering ring and the right lateral gathering ring is larger than the aperture diameter of the lower middle gathering ring, the thickness of the left lateral gathering ring and the right lateral gathering ring is larger than the thickness of the lower middle gathering ring, the distance between the left lateral gathering ring and the right lateral gathering ring is smaller than the width of the drafted output sliver, the left lateral gathering ring and the right lateral gathering ring form a lateral gathering channel with a constant width, the lower gathering ring on the left side of the left lateral gathering ring is the left lower fixed ring 11, the lower gathering ring on the right side of the right lateral gathering ring is the right lower fixed ring 10, the upper stable gathering ring is arranged on the upper part of the left lateral gathering ring and the right lateral gathering ring, the left side of the upper stable gathering ring is integrally fixedly connected with the upper side of the left lateral gathering ring, the right side of the upper stable gathering ring is integrally fixedly connected with the upper side of the right lateral gathering ring, the material of the upper stable gathering ring is the same as that of the lower middle gathering ring, the upper stable gathering ring is directly staggered and laminated by 2-4 layers of stable gathering single-layer rings, the structure and material of the stable gathering single-layer ring are consistent with those of the lower middle gathering ring, so that the aperture diameter between the warp yarns and weft yarns of the stable gathering single-layer ring is completely consistent with the aperture diameter between the warp yarns and weft yarns of the lower middle gathering ring, the apertures between the warp yarns and weft yarns are staggered and laminated during the lamination of each stable gathering single-layer ring, so that the aperture diameter of the upper stable gathering ring formed after lamination is smaller than the aperture diameter of the lower middle gathering ring, the thickness of the upper stable gathering ring is larger than the thickness of the lower middle gathering ring, the left side of each stable gathering single-layer ring in the upper stable gathering ring after staggered lamination is integrally fixedly connected with the left lateral gathering ring, and the right side is integrally fixedly connected with the right lateral gathering ring, so as to realize the fixation of each stable gathering single-layer ring in the upper stable gathering ring after lamination, and then realize the effective lamination between the stable gathering single-layer rings without using any intermediate adhesive, the lower middle gathering ring, the left lateral gathering ring, the right lateral gathering ring and the upper stable gathering ring form a complete gathering channel for gathering the drafted sliver.

[0016] The output lower roller 15 is arranged at the front of the gathering pipe, and the output lower roller includes an output lower roller shaft which is a solid cylindrical structure, and the material of the output lower roller shaft is iron or steel. The output lower roller shaft penetrates all the spindles, and the left end of the output lower roller shaft is fixedly connected with the left end of the gathering pipe through the left fixing rod 13, and the right end of the output lower roller shaft is fixedly connected with the right end of the gathering pipe through the right fixing rod 12, so that a certain distance is kept between the output lower roller shaft and the gathering pipe. An output lower roller sleeve is arranged at each spindle on the output lower roller shaft, and the output lower roller sleeve is an annular structure, and the material of the output lower roller sleeve is the same as that of the output lower roller shaft. The output lower roller sleeve is sleeved on the output lower roller shaft through a bearing, and a certain distance is kept between the output lower roller sleeve and the gathering pipe, and meanwhile, the output lower roller sleeve can freely rotate around the output lower roller shaft. An output upper roller 14 is arranged above the output lower roller, and the output upper roller includes an output upper roller shaft which is a solid cylindrical structure, and the material of the output upper roller shaft is iron or steel. The output upper roller shafts of adjacent two spindles are fixedly connected in an integrated manner. An output upper roller sleeve is arranged at the left spindle and the right spindle of the output upper roller shaft respectively, and the output upper roller sleeve is an annular structure and is made of hard rubber. The output upper roller sleeve is sleeved on the output upper roller shaft through a bearing, so that the output upper roller sleeve can freely rotate around the output upper roller shaft. An independent embedding claw is arranged at the front of the pressing assembly, and the independent embedding claw is connected with the pressing assembly through an embedding claw connecting rod. When the pressing assembly is pressed down, the corresponding pressure is transmitted to the independent embedding claw through the embedding claw connecting rod. The part between the two output upper roller sleeves of the output upper roller shaft is embedded in the independent embedding claw, so that the connection between the output upper roller and the pressing assembly is realized, and then the fixed installation of the output upper roller is realized. A connecting gear box is arranged on one side of the embedding claw connecting rod, and a connecting gear is arranged in the connecting gear box, so that the transmission connection between the rubber sleeve of the upper stretching rubber roller of the front stretching roller pair and the output upper roller sleeve of the output upper roller is realized.

[0017] In use, the short fiber roving with a certain twist is fed into the drafting system by the pair of back drafting rollers, at this time the pressing assembly is pressed down, so that the rubber sleeve of the upper drafting rubber roller of the pair of back drafting rollers and the roller sleeve of the lower drafting roller are kept in close pressing contact, so that the back feeding nip is formed between the two, which is generated by the passive rotation of the upper drafting rubber roller driven by the active rotation of the lower drafting roller, at the same time, the rubber sleeve of the upper drafting rubber roller of the pair of middle drafting rollers and the roller sleeve of the lower drafting roller are kept in close pressing contact, so that the middle transition nip is formed between the two, which is generated by the passive rotation of the upper drafting rubber roller driven by the active rotation of the lower drafting roller, at the same time, the rubber sleeve of the upper drafting rubber roller of the pair of front drafting rollers and the roller sleeve of the lower drafting roller are kept in close pressing contact, so that the front output nip is formed between the two, which is generated by the passive rotation of the upper drafting rubber roller driven by the active rotation of the lower drafting roller, at the same time, the output upper roller sleeve and the output lower roller sleeve are kept in close pressing contact, the rubber sleeve of the upper drafting rubber roller of the pair of front drafting rollers is rotated and then drives the output upper roller sleeve of the output upper roller to rotate through the bridge gear, the output upper roller sleeve of the output upper roller is rotated and then drives the output lower roller sleeve of the output lower roller to rotate, so that the twist resisting output nip is formed between the two, which is generated by the passive rotation of the output lower roller sleeve driven by the active rotation of the output upper roller sleeve, the short fiber roving is continuously fed into the drafting system by the back feeding nip, the fed short fiber roving is then driven by the middle transition nip, so that the back drafting action is formed between the pair of back drafting rollers and the pair of middle drafting rollers, which is input by the back feeding nip and output by the middle transition nip, under the action of the back drafting, the fibers in the short fiber roving are gradually tensioned from the relatively loose interlaced state, the tensioned fibers are gradually stretched from the interlaced curved state under the action of the continuous drafting force, in the stretching process, the fibers are gradually straightened by overcoming the curved state under the original interlacing, in the straightening process, the cohesion between the fibers under the interlacing is reduced, so that a certain amount of slip occurs between the fibers, then the linear density of the fed short fiber roving is reduced, so that the back drafted sliver is obtained, the back drafted sliver is continuously output by the middle transition nip, the output back drafted sliver is then driven by the front output nip, so that the front drafting action is formed between the pair of middle drafting rollers and the pair of front drafting rollers, which is input by the middle transition nip and output by the front output nip, under the action of the front drafting, the fibers in the back drafted sliver continue to be stretched from the interlaced curved state under the action of the drafting force, in the stretching process, the fibers are gradually straightened by overcoming the curved state under the original interlacing, in the straightening process, the cohesion between the fibers under the interlacing is reduced, so that a certain amount of slip occurs between the fibers, then the linear density of the fed back drafted sliver is reduced, so that the front drafted sliver is obtained, the front drafted sliver is continuously output by the front output nip, the continuously output front drafted sliver is finally continuously output by the twist resisting output nip,The front tugging sliver between the front output nip and the blocking output nip is subjected to the gathering effect of the gathering zone. In the gathering zone, the negative pressure generated by the negative pressure fan enters the cleaning box through the filter screen not blocked by the blocking piece, and then enters the first negative pressure main pipe through the first negative pressure pipe connection port on the cleaning box and the second negative pressure pipe connection port, and the negative pressure in the first negative pressure main pipe and the second negative pressure main pipe enters the gathering pipe through the corresponding negative pressure branch pipe and the negative pressure inlet in sequence, thereby forming a gathering airflow flow from the outside to the gathering pipe through the negative pressure inlet. Under the driving action of the gathering airflow flow, the airflow from the outside into the gathering pipe enters the cleaning box through the negative pressure branch pipe and the negative pressure main pipe in sequence. In the process of the outside airflow flowing in, part of the loose fibers in the front tugging sliver are also brought in, so that the brought-in loose fibers are continuously accumulated on the filter screen not blocked by the blocking piece. Due to the airflow flow, the fibers are tightly attached to the filter screen. With the rotation of the filter screen, when the part of the filter screen where the fibers are accumulated rotates to be blocked by the blocking piece, the airflow flow disappears due to the blocking of the blocking piece, and then the tight attachment between the fibers and the filter screen disappears, so that the fibers slide down along the filter screen under the action of their own gravity, thereby realizing the automatic cleaning effect of the filter screen.

[0018] The left end or the right end of the driving roller drives rotation through the corresponding transmission mechanism, and then drives the lower gathering ring to rotate around the gathering pipe and the tension roller, and then drives the left and right horizontal gathering rings and the upper stable gathering ring fixedly connected with the lower gathering ring to rotate synchronously. In the rotation process, the tension roller self-adapts the tension between the tension roller and the lower gathering ring through the compression elasticity of each tension roller, thereby realizing the self-adaptive tensioning of the lower gathering ring in the rotation process. The continuously output front draft tow enters the gathering channel. In the gathering channel, the linear speed of the lower gathering ring, the left and right horizontal gathering rings and the upper stable gathering ring is consistent with the conveying speed of the front draft tow, so that the front draft tow in the gathering channel is not affected by the friction force, thereby realizing the stable and consistent gathering of the front draft tow. The front draft tow entering the gathering channel is first subjected to the mechanical gathering effect of the left and right horizontal gathering rings. Under the mechanical gathering effect, the relatively loose front draft tow is immediately gathered, so that the fibers in the front draft tow are rapidly changed from the initial dispersed and flat state with a certain spacing to the flat state with close contact, thereby realizing the horizontal mechanical gathering of the front draft tow. The mechanically gathered front draft tow then immediately enters the horizontal gathering channel. In the horizontal gathering channel, under the driving of the gathering airflow, the external airflow forms the left horizontal gathering airflow which enters the gathering pipe through the negative pressure inlet after the left horizontal gathering ring and the lower middle gathering ring, and simultaneously forms the right horizontal gathering airflow which enters the gathering pipe through the negative pressure inlet after the right horizontal gathering ring and the lower middle gathering ring. Under the joint action of the left and right horizontal gathering airflows, the fibers in the front draft tow are gathered to the center of the tow, thereby realizing the horizontal airflow gathering of the front draft tow. In the horizontal airflow gathering process, the left horizontal gathering airflow enters the gathering pipe through the left rear gathering port, and the right horizontal gathering airflow enters the gathering pipe through the right rear gathering port. Under the joint action of the left and right horizontal gathering airflows in this process, the fibers in the front draft tow are rapidly gathered to the center of the tow, and then the fibers are continuously extruded to the center of the tow, so that the front draft tow is changed from the flat state of fiber distribution to the space state of approximately cylindrical shape formed by the mutual stacking of fibers. Then, the left horizontal gathering airflow enters the gathering pipe through the front port of the gathering port, and the right horizontal gathering airflow enters the gathering pipe through the front port of the gathering port. Under the joint action of the left and right horizontal gathering airflows in this process, the fibers in the front draft tow continue to be gathered to the center of the tow, so that the fibers continue to be continuously extruded to the center of the tow, thereby making the fiber distribution in the front draft tow more close to the cylindrical shape, and then realizing the gradual horizontal gathering of the front draft tow.The outside airflow is formed into the auxiliary gathering airflow in the order of the upper stable gathering ring, the lower middle gathering ring and then enters into the gathering tube through the negative pressure inlet under the driving of the airflow flow, and the auxiliary gathering airflow produces a downward pressure on the fibers in the front drafting sliver, so that the fibers in the front drafting sliver do not intertwine or turn over during the gathering process, thereby realizing the stable parallel transverse gathering of the front drafting sliver. Since the aperture of the left and right transverse gathering rings is larger than that of the lower middle gathering ring, more than 80% of the airflow flow is used to generate the left and right transverse gathering airflows, and since the aperture of the upper stable gathering ring is smaller than that of the lower middle gathering ring, less than 20% of the airflow flow is used to generate the auxiliary gathering airflow, so that the auxiliary gathering airflow is more uniformly applied to the upper part of the front drafting sliver, thereby realizing the distribution and coordination of the action between the transverse gathering and the auxiliary gathering. The front drafting sliver after the gathering action is continuously output through the driving of the blocking twisting output jaw, and the front drafting sliver after the output is twisted to obtain the required fine yarn with a certain strength, and the fine yarn obtained during the twisting process is synchronously wound on the fine yarn tube.

Claims

1. A high-efficiency condensing spinning device, comprising a front car platform and a rear car platform which are structurally identical, the front car platform and the rear car platform each comprising 200-500 structurally identical spindle positions arranged horizontally along the length direction, each spindle position comprising a drafting system, the drafting system comprising, from back to front along the movement direction of the fibers in the drafting system, a back drafting roller pair, a middle drafting roller pair, a front drafting roller pair, the back drafting roller pair, the middle drafting roller pair, and the front drafting roller pair being structurally identical and comprising an upper drafting rubber-covered roller and a lower drafting roller, the upper drafting rubber-covered roller comprising a rubber-covered roller shaft which is a solid cylindrical structure made of steel, the rubber-covered roller shafts of adjacent two spindle positions being integrally connected, rubber-covered roller sleeves being respectively sleeved on the left side and the right side of the outer circumference of the rubber-covered roller shaft, the rubber-covered roller sleeves being made of rubber, the rubber-covered roller sleeves being connected with the rubber-covered roller shafts through rolling bearing structures, so that the rubber-covered roller sleeves can freely rotate around the rubber-covered roller shafts, the rubber-covered roller shafts between the two rubber-covered roller sleeves being embedded in the embedding claws of a pressing assembly to realize the installation and fixation of the upper pressing rubber-covered roller, the middle parts of the rubber-covered roller shafts of the upper drafting rubber-covered rollers of the back drafting roller pair, the middle drafting roller pair, and the front drafting roller pair being respectively embedded in the back, middle, and front embedding claws of the pressing assembly, the lower drafting roller comprising a drafting roller shaft which is a solid cylindrical structure made of steel, the drafting roller shafts of 6-8 spindle positions being integrally fixedly connected, a roller seat being arranged between adjacent two drafting roller shafts, adjacent two roller shafts being transmissionally connected with the corresponding roller seats, so as to realize the mutual connection between all the drafting roller shafts of the spindle positions in a transmission state, a drafting roller sleeve being sleeved on the outer circumference of the drafting roller shaft of each spindle position, the drafting roller sleeve being made of the same material as the drafting roller shaft, the drafting roller sleeve being integrally fixedly connected with the drafting roller shaft, strip-shaped grooves being opened at equal intervals along the length direction of the side outer circumference of the drafting roller sleeve, characterized in that: a condensing tube is arranged at the front part of the front drafting roller pair, a condensing opening is opened on the upper side of the condensing tube at each spindle position, a negative pressure inlet is arranged on the condensing tube between adjacent two spindle positions, the negative pressure inlet is in communication connection with a negative pressure air bellow through a negative pressure branch pipe and a negative pressure main pipe in sequence, a driving roller is arranged below the condensing tube, and a tension roller is arranged in the region between the driving roller and the condensing tube; a lower condensing ring is sleeved on the condensing tube, the tension roller, and the driving roller, the lower condensing ring comprising a lower middle condensing ring, a left lower fixed ring, and a right lower fixed ring, the inner side of the annular lower condensing ring being in contact with the upper side of the condensing tube, and the lower middle condensing ring completely covering the condensing opening, a left transverse condensing ring being arranged on the left side of the upper part of the lower condensing ring at the condensing opening, a right transverse condensing ring being arranged on the right side of the upper part of the lower condensing ring at the condensing opening, and an upper stable condensing ring being arranged on the upper parts of the left transverse condensing ring and the right transverse condensing ring; the lower middle condensing ring is located at the middle part of the width of the lower condensing ring, the left lower fixed ring is located at the left side of the lower middle condensing ring, the right lower fixed ring is located at the right side of the lower middle condensing ring, and the left lower fixed ring and the right lower fixed ring are symmetrically distributed about the lower middle condensing ring. The left transverse gathering ring and the right transverse gathering ring are vertically arranged, and the left transverse gathering ring and the right transverse gathering ring keep a vertical state with the lower gathering ring. The material of the left transverse gathering ring and the right transverse gathering ring is the same as that of the lower middle gathering ring. The left transverse gathering ring and the right transverse gathering ring are smooth woven fabrics woven by warp yarns and weft yarns. The warp yarns and the weft yarns are both chemical fiber filaments, and the linear density of the chemical fiber filaments used in the left transverse gathering ring and the right transverse gathering ring is greater than that of the chemical fiber filaments used in the lower middle gathering ring. Therefore, the warp yarns and the weft yarns of the woven lower left transverse gathering ring and the right transverse gathering ring keep a certain and uniformly distributed aperture. The aperture of the left transverse gathering ring and the right transverse gathering ring is greater than that of the lower middle gathering ring. The thickness of the left transverse gathering ring and the right transverse gathering ring is greater than that of the lower middle gathering ring. The distance between the left transverse gathering ring and the right transverse gathering ring is less than the width of the output strand after drafting. The left transverse gathering ring and the right transverse gathering ring form a transverse gathering channel with a constant width. The lower gathering ring on the left side of the left transverse gathering ring is a left lower fixed ring, and the lower gathering ring on the right side of the right transverse gathering ring is a right lower fixed ring. The left side of the upper stable gathering ring is integrally fixedly connected with the upper side of the left transverse gathering ring, and the right side of the upper stable gathering ring is integrally fixedly connected with the upper side of the right transverse gathering ring. The material of the upper stable gathering ring is the same as that of the lower middle gathering ring. The upper stable gathering ring is directly interlaced and overlapped by 2-4 layers of stable gathering single-layer rings. The structure of the stable gathering single-layer ring is consistent with that of the lower middle gathering ring. Therefore, the aperture between the warp yarns and the weft yarns of the stable gathering single-layer ring is completely consistent with the aperture between the warp yarns and the weft yarns of the lower middle gathering ring. The apertures between the warp yarns and the weft yarns of the stable gathering single-layer ring are interlaced and overlapped during the overlapping process, so that the aperture of the upper stable gathering ring formed after overlapping is smaller than that of the lower middle gathering ring, and the thickness of the upper stable gathering ring is greater than that of the lower middle gathering ring. The left side of each stable gathering single-layer ring in the upper stable gathering ring after interlaced overlapping is integrally fixedly connected with the left transverse gathering ring, and the right side is integrally fixedly connected with the right transverse gathering ring, so as to realize the fixation of each stable gathering single-layer ring in the upper stable gathering ring after overlapping, and then realize the effective overlapping between the stable gathering single-layer rings without using any intermediate adhesive. The lower middle gathering ring, the left transverse gathering ring, the right transverse gathering ring and the upper stable gathering ring form a complete gathering channel for gathering the drafted strand. The output lower roller is arranged at the front of the collecting pipe, and includes an output lower roller shaft penetrating all the spindles. The left end of the output lower roller shaft is fixedly connected with the left end of the collecting pipe through a left fixing rod, and the right end of the output lower roller shaft is fixedly connected with the right end of the collecting pipe through a right fixing rod, so that a certain distance is kept between the output lower roller shaft and the collecting pipe. An output upper roller is arranged above the output lower roller, and includes an output upper roller shaft. The output upper roller shafts of adjacent two spindles are fixedly connected in an integrated manner. Output upper roller sleeves are arranged at positions of the output upper roller shafts at the left spindles and the right spindles respectively. The independent embedding claw is arranged at the front of the pressing assembly, and is connected with the pressing assembly through an embedding claw connecting rod. The part between the two output upper roller sleeves of the output upper roller shaft is embedded in the independent embedding claw, so that the connection between the output upper roller and the pressing assembly is realized. A connecting gear box is arranged on one side of the embedding claw connecting rod, and a connecting gear is arranged in the connecting gear box, so that the transmission connection between the rubber sleeve of the upper stretching rubber roller of the front stretching roller pair and the output upper roller sleeve of the output upper roller is realized.

2. A high efficiency compact spinning device according to claim 1, characterized in that: The collecting port is of a T-shaped structure. The rear end of the collecting port includes left and right symmetrical left and right rear gathering ports. The front end of the collecting port is of a trapezoidal mechanism with a gradually decreasing diameter from the rear to the front. The front end of the collecting port is in communication with the front sides of the left and right rear gathering ports.

3. A high efficiency compact spinning device as claimed in claim 1, wherein: The negative pressure main pipe includes the first negative pressure main pipe and the second negative pressure main pipe arranged in parallel. The first negative pressure pipe connecting port and the second negative pressure pipe connecting port are opened on the side of the cleaning box facing the first negative pressure main pipe and the second negative pressure main pipe. The first negative pressure pipe connecting port is in communication with the first negative pressure main pipe, and the second negative pressure pipe connecting port is in communication with the second negative pressure main pipe. The negative pressure branch pipes on the front vehicle platform are in communication with the first negative pressure main pipe and the second negative pressure main pipe in turn and staggered. The negative pressure branch pipes on the rear vehicle platform are in communication with the first negative pressure main pipe and the second negative pressure main pipe in turn and staggered.

4. A high efficiency compact spinning device according to claim 1, wherein: The cleaning suction port is opened on one side of the negative pressure box, and is in communication with the cleaning pipe. The cleaning pipe is in communication with the cotton suction pipette.

5. A high efficiency compact spinning device as claimed in claim 1, wherein: The tension roller is of a cylindrical solid structure, and penetrates all the spindles. The left end of the tension roller is connected with the vehicle platform through a left elastic connecting piece, so that the connection between the left end of the tension roller and the vehicle platform is realized. The right end of the tension roller is connected with the vehicle platform through a right elastic connecting piece, so that the connection between the right end of the tension roller and the vehicle platform is realized. The left elastic connecting piece and the right elastic connecting piece are of the same structure and are both ring-shaped tensile spring structures.

6. A high efficiency compact spinning device according to claim 1, wherein: The output lower roller sleeve is arranged at each spindle on the output lower roller shaft. The output lower roller sleeve is of a ring structure, and the material of the output lower roller sleeve is the same as that of the output lower roller shaft. The output lower roller sleeve is sleeved on the output lower roller shaft through a bearing, and keeps a certain distance between the output lower roller sleeve and the collecting pipe. Meanwhile, the output lower roller sleeve can rotate freely around the output lower roller shaft.

7. A high efficiency compact spinning device as claimed in claim 1, wherein: The negative pressure fan is arranged in the negative pressure air bellow, and the rectangular blocking plate is arranged in the negative pressure air bellow and fixedly connected with the inner side of the negative pressure air bellow, so as to divide the negative pressure air bellow into a negative pressure box and a cleaning box, and the negative pressure fan is arranged in the negative pressure box. The filter screen hole is arranged on the blocking plate, and the filter screen is arranged in the filter screen hole. The filter screen is circular, and the fixing ring is arranged on the outer circumference of the filter screen. The outer circumference of the filter screen is fixedly connected with the fixing ring, so that the filter screen and the fixing ring are tightly connected. The fixing ring is connected with the inner side of the side of the filter screen hole facing the cleaning box through a bearing, and the fixing ring is driven to rotate through a corresponding transmission mechanism, so that the filter screen rotates around the filter screen hole. The closing piece is arranged on the side of the filter screen hole facing the negative pressure box. The closing piece is semicircular and has a whole gas-tight structure. The closing piece is fixedly connected with the inner side of the filter screen hole.

8. A compact spinning method of a high efficient compact spinning device according to claim 1, characterized in that: The short fiber roving with certain twist is fed into the drafting system by the pair of back drafting rollers, at this time the pressure assembly is pressed down, so that the rubber sleeve of the upper drafting rubber roller of the pair of back drafting rollers and the roller sleeve of the lower drafting roller keep close pressing contact, so that the back feeding nip is formed between them, which is driven by the active rotation of the lower drafting roller and the passive rotation of the upper drafting rubber roller, at the same time, the rubber sleeve of the upper drafting rubber roller of the pair of middle drafting rollers and the roller sleeve of the lower drafting roller keep close pressing contact, so that the middle transition nip is formed between them, which is driven by the active rotation of the lower drafting roller and the passive rotation of the upper drafting rubber roller, at the same time, the rubber sleeve of the upper drafting rubber roller of the pair of front drafting rollers and the roller sleeve of the lower drafting roller keep close pressing contact, so that the front output nip is formed between them, which is driven by the active rotation of the lower drafting roller and the passive rotation of the upper drafting rubber roller, at the same time, the output upper roller sleeve and the output lower roller sleeve keep close pressing contact, the rubber sleeve of the upper drafting rubber roller of the pair of front drafting rollers rotates and drives the output upper roller sleeve to rotate through the bridge gear, the output upper roller sleeve rotates and drives the output lower roller sleeve to rotate, so that the twist resisting output nip is formed between them, which is driven by the active rotation of the output upper roller sleeve and the passive rotation of the output lower roller sleeve, the short fiber roving is continuously fed into the drafting system by the back feeding nip, the fed short fiber roving is driven by the middle transition nip, so that the back drafting action is formed between the pair of back drafting rollers and the pair of middle drafting rollers, which is input by the back feeding nip and output by the middle transition nip, under the action of the back drafting, the fibers in the short fiber roving are gradually stretched from the interlaced curved state under the tension, in the process of stretching, the fibers are gradually straightened by overcoming the curved state under the original interlacing, in the process of straightening, the cohesion between the fibers under the interlacing is reduced, so that a certain slip occurs between the fibers, then the linear density of the fed short fiber roving is reduced, so that the back drafted sliver is obtained, the back drafted sliver is continuously output by the middle transition nip, the output back drafted sliver is driven by the front output nip, so that the front drafting action is formed between the pair of middle drafting rollers and the pair of front drafting rollers, which is input by the middle transition nip and output by the front output nip, under the action of the front drafting, the fibers in the back drafted sliver continue to be stretched from the interlaced curved state under the tension, in the process of stretching, the fibers are gradually straightened by overcoming the curved state under the original interlacing, in the process of straightening, the cohesion between the fibers under the interlacing is reduced, so that a certain slip occurs between the fibers, then the linear density of the fed back drafted sliver is reduced, so that the front drafted sliver is obtained, the front drafted sliver is continuously output by the front output nip, the continuously output front drafted sliver is finally continuously output by the twist resisting output nip.The front drafting tow is subjected to the gathering effect of the gathering zone between the front output nip and the blocking output nip. In the gathering zone, the negative pressure generated by the negative pressure fan enters the cleaning box through the filter screen that is not blocked by the blocking piece, and then enters the first negative pressure main pipe through the first negative pressure pipe connection port on the cleaning box and the second negative pressure pipe connection port, and the negative pressure in the first negative pressure main pipe and the second negative pressure main pipe enters the gathering pipe through the corresponding negative pressure branch pipes and negative pressure inlet ports in sequence, thereby forming a gathering airflow flow from the outside to the gathering pipe through the negative pressure inlet port. Under the driving effect of the gathering airflow flow, the airflow from the outside into the gathering pipe enters the cleaning box through the negative pressure branch pipes and the negative pressure main pipes in sequence. In the process of the outside airflow flowing in, part of the loose fibers in the front drafting tow are also brought in, so that the brought-in loose fibers are continuously accumulated on the filter screen that is not blocked by the blocking piece. Due to the airflow flow, the fibers are tightly attached to the filter screen. With the rotation of the filter screen, when the part of the filter screen where the fibers are accumulated rotates to be blocked by the blocking piece, the airflow flow disappears due to the blocking of the blocking piece, and then the tight attachment between the fibers and the filter screen disappears, so that the fibers slide down along the filter screen under the action of their own gravity, thereby realizing the automatic cleaning effect of the filter screen. The left end or the right end of the driving roller drives rotation through the corresponding transmission mechanism, and then drives the lower gathering ring to rotate around the gathering pipe and the tension roller under the driving of the driving roller, and then drives the left transverse gathering ring, the right transverse gathering ring and the upper stable gathering ring fixedly connected with the lower gathering ring to rotate synchronously. In the rotating process, the tension roller self-adapts the tension between the tension roller and the lower gathering ring through the compression elasticity of each tension roller, so as to realize the self-adaptive tensioning of the lower gathering ring in the rotating process. The continuously output front draft tow enters the gathering channel. In the gathering channel, the linear speed of the rotation of the lower gathering ring, the left transverse gathering ring, the right transverse gathering ring and the upper stable gathering ring is consistent with the conveying speed of the front draft tow, so that the front draft tow in the gathering channel is not affected by the friction force, thereby realizing the stable and consistent gathering of the front draft tow. The front draft tow entering the gathering channel is first subjected to the mechanical gathering effect of the left transverse gathering ring and the right transverse gathering ring. Under the mechanical gathering effect, the front draft tow in a relatively loose state is immediately gathered, so that the fibers in the front draft tow are rapidly changed from the initial dispersed and flat state with a certain spacing to the flat state with close contact, thereby realizing the transverse mechanical gathering of the front draft tow. The front draft tow after the mechanical gathering immediately enters the transverse gathering channel. In the transverse gathering channel, under the driving of the gathering airflow, the external airflow forms the left transverse gathering airflow which enters the gathering pipe through the negative pressure inlet after the left transverse gathering ring and the lower middle gathering ring, and simultaneously forms the right transverse gathering airflow which enters the gathering pipe through the negative pressure inlet after the right transverse gathering ring and the lower middle gathering ring. Under the joint action of the left transverse gathering airflow and the right transverse gathering airflow, the fibers in the front draft tow are gathered to the center of the tow, thereby realizing the transverse airflow gathering of the front draft tow. In the transverse airflow gathering process, the left transverse gathering airflow enters the gathering pipe through the left rear gathering port, and the right transverse gathering airflow enters the gathering pipe through the right rear gathering port. In this process, under the joint action of the left transverse gathering airflow and the right transverse gathering airflow, the fibers in the front draft tow are rapidly gathered to the center of the tow, and then the fibers are continuously extruded to the center of the tow, so that the front draft tow is changed from the flat state of fiber distribution to the space state of approximately cylindrical shape formed by the mutual stacking of fibers. Then, the left transverse gathering airflow enters the gathering pipe through the front port of the gathering port, and the right transverse gathering airflow enters the gathering pipe through the front port of the gathering port. In this process, under the joint action of the left transverse gathering airflow and the right transverse gathering airflow, the fibers in the front draft tow continue to be gathered to the center of the tow, so that the fibers continue to be continuously extruded to the center of the tow, thereby making the fiber distribution in the front draft tow more close to the cylindrical shape, and then realizing the gradual transverse gathering of the front draft tow. Under the driving of the gathering airflow, the external airflow enters the gathering pipe through the negative pressure inlet after the upper stable gathering ring and the lower middle gathering ring.The auxiliary converging airflow is formed, and an underpressure effect is generated on the fibers in the front draft sliver under the action of the auxiliary converging airflow, so that the fibers in the front draft sliver do not intertwine or turn over during the converging process, and then the stable parallel transverse converging of the front draft sliver is realized. Since the diameters of the apertures of the left and right transverse converging rings are larger than the diameter of the aperture of the lower middle converging ring, more than 80% of the converging airflow flow is used to generate the left and right transverse converging airflows. Since the diameter of the aperture of the upper stable converging ring is smaller than the diameter of the aperture of the lower middle converging ring, less than 20% of the converging airflow flow is used to generate the auxiliary converging airflow, and the auxiliary converging airflow is more uniformly applied to the upper part of the front draft sliver, so that the distribution and coordination of the effects between the transverse converging and the auxiliary converging are realized. The front draft sliver after the converging effect is continuously output by the blocking twisting output jaw, and the front draft sliver after the output is twisted to obtain the required fine yarn with a certain strength, and the fine yarn obtained during the twisting process is synchronously wound on the fine yarn tube.

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