CN113652780B - Impurity-removing carding method and device of rotor spinning machine based on air suction assistance - Google Patents

Abstract

The invention provides a method and a device for impurity removing and carding of a rotor spinning machine based on air suction assistance, and relates to the technical field of spinning equipment. The method comprises the following impurity detection steps: when the cotton sliver is fed into the carding cavity, impurity information of the cotton sliver is detected by the impurity detector and a detection result is sent to the air pumping control device; an impurity self-adaptive inspiration auxiliary step: when the cotton sliver is carded by the carding roller, the air exhaust control device controls the air suction holes corresponding to the region where the impurities are located on the carding roller to exhaust air according to the detection result so as to form negative pressure on the surface of the carding roller to generate auxiliary adsorption force, and meanwhile, the impurities mixed on the inner side of the cotton sliver are sucked away through the air suction holes; impurity removing and carding: when the carding roller combs the cotton sliver, the air supply channel supplies air to the carding cavity, and the impurities or part of the impurities fall into the impurity discharge belt to be discharged through the impurity discharge area of the carding cavity under the action of self gravity. The invention realizes the self-adaptive impurity suction based on the cotton sliver impurity characteristics, and considers the impurity removal effect and the energy-saving requirement.

Description

Impurity-removing carding method and device of rotor spinning machine based on air suction assistance

Technical Field

The invention relates to the technical field of spinning equipment, in particular to a method and a device for impurity removing and carding of a rotor spinning machine based on air suction assistance.

Background

The rotor spinning machine has become the most mature spinning form with the widest application range and larger economic and social effects in the novel spinning. Various impurities such as polypropylene fiber, hair and 'three-filament' are often generated in the spinning process, the generation of the impurities greatly reduces the product quality of the raw materials, and therefore the impurities in cotton slivers need to be removed in the spinning process.

At present, in the air suction type rotor spinning machine on the market, the carding and impurity stripping have two modes: the first is to use the centrifugal force of impurities to fall impurities freely. The carding roller and a vertical plane are arranged at a certain included angle alpha (alpha is less than 90 degrees), the impurity peeling direction and a horizontal plane form an angle alpha, and the impurity removal is called as free impurity removal by means of the comprehensive action of centrifugal force and gravity generated under the driving of high-speed rotation of the carding roller. The mode is longer to carry fibre transfer passageway toward the revolving cup for the fibre obtains abundant straightening, and the resultant yarn uniformity is better, and the energy consumption is low. The second is an active gettering method. The carding roller is vertically arranged, the impurity stripping direction and the horizontal plane are parallel, the impurity removal completely depends on the high negative pressure suction of airflow for separation, and the carding roller can also effectively separate impurities from various raw materials with large impurity content, and has a wide application range.

However, the existing impurity removal scheme has the following defects:

1) When the free impurity falling mode is adopted, in the impurity separation process, light impurities with light weight, such as short fibers, are not thrown far away when being separated, are close to the fiber conveying area, are easy to be sucked back to the carding cavity after being accumulated in the stripping area under the action of fiber conveying negative pressure airflow, and are rolled and sucked back, so that the yarn breakage rate is increased, and the adaptability to regeneration raw materials with more short fibers and impurities is poor. When an active gettering mode is adopted, the impurities can be peeled off along the horizontal plane only by requiring higher gettering negative pressure, and the number of the removed impurities is changed due to small fluctuation of the gettering negative pressure, so that the variation of a finished yarn thickness section is larger; but also has the disadvantages of high energy consumption of the equipment and easy blockage of the gettering channel. That is to say, the existing rotor spinning machine carding and impurity stripping mode can not realize the complete improvement in the aspects of raw material adaptability, yarn quality consistency, low energy consumption and the like.

2) Regardless of free impurity falling or active impurity absorption, all cotton slivers entering the carding cavity are subjected to impurity removal and carding based on the same impurity removal process, and the impurity removal process cannot be adaptively adjusted according to impurity characteristics of cotton sliver raw materials, such as impurity distribution areas, impurity type characteristics and the like. In fact, the impurities are not uniformly distributed on the cotton slivers, and some cotton slivers have smaller impurities and some cotton slivers have more impurities; the impurity type and the connection between the impurities and the cotton sliver are not the same, some types of impurities are connected with the effective fibers more tightly, some types of impurities are connected with the effective fibers more loosely, and the like. For example, for impurities which are tightly connected, a large external force is often required to separate the impurities from the cotton sliver, while impurities which are loosely connected are easily separated from the cotton sliver, and a large external force is not required to be provided.

Aiming at the above dilemma of the existing spinning machine market, how to provide a technical scheme for impurity removing and carding, which has high impurity removing efficiency and can be self-adaptive according to the impurity characteristics of cotton slivers, is a technical problem which needs to be solved at present. Further, how to consider raw material adaptability, yarn quality consistency and low energy consumption is also a technical problem which needs to be solved urgently at present.

Disclosure of Invention

The invention aims to: overcomes the defects of the prior art and provides a method and a device for impurity removal and carding of a rotor spinning machine based on air suction assistance. According to the invention, the impurity detector is used for detecting the impurity characteristics of the cotton sliver, air is extracted from the carding roller through the air suction holes according to the detection result to form negative pressure on the surface of the carding roller so as to generate auxiliary adsorption force, and meanwhile, impurities mixed in the inner side of the cotton sliver are sucked away through the air suction holes, so that the self-adaptive impurity suction based on the impurity characteristics of the cotton sliver is realized, and the impurity discharge effect and the energy-saving requirement are both considered. Furthermore, the free impurity falling and accurate impurity absorption are organically combined, the impurity rolling back absorption of an impurity discharging area of the carding cavity is reduced or eliminated, and the method has the characteristics of wide raw material adaptability, good yarn quality consistency and low energy consumption.

In order to achieve the above object, the present invention provides the following technical solutions:

a impurity-removing and carding method of a rotor spinning machine based on air suction assistance is disclosed, the rotor spinning machine comprises a carding cavity provided with a carding roller, the carding cavity is communicated with a cotton sliver feeding channel and a fiber conveying channel, and an air supplementing channel and an impurity-removing area of the carding cavity are arranged below the corresponding carding cavity, and the method comprises the following steps:

and (3) impurity detection: when a cotton sliver is fed into the carding chamber through the cotton sliver feeding channel, impurity information of the cotton sliver is detected by an impurity detector arranged in the cotton sliver feeding channel, and a detection result is sent to the air extraction control device, wherein the impurity information comprises information of an area where the impurity is located;

an impurity self-adaptive inspiration auxiliary step: when the cotton sliver fed into the carding cavity is carded by the carding roller, according to the detection result, the air exhaust control device controls the air suction holes corresponding to the region where the impurities are located on the carding roller to exhaust air to form negative pressure on the surface of the carding roller so as to generate auxiliary adsorption force, and meanwhile, the impurities mixed in the inner side of the cotton sliver are sucked away through the air suction holes;

impurity removing and carding: the auxiliary step is carried out simultaneously with the self-adaptive air suction of the impurities, when the cotton sliver is combed by the combing roller, air is supplied to the combing cavity through the air supply channel, and the impurities or part of the impurities fall into the impurity discharge belt through the impurity discharge area of the combing cavity under the action of the self gravity and are discharged.

Further, the air suction holes on the carding roller are divided into a plurality of areas, each area is provided with one or more air suction holes, and the air suction control device can control the air suction area and/or the air suction amount of the carding roller according to the detection result.

Further, the impurity detector comprises a camera, an image recognition unit and an impurity evaluation unit, the step of detecting the impurity information of the cotton sliver is as follows,

shooting image data of the cotton sliver in the cotton sliver feeding channel through a camera, and transmitting the cotton sliver image data to an image identification unit;

the image identification unit identifies the cotton sliver image data, acquires impurity distribution information and impurity type information in the cotton sliver, and sends the impurity distribution information and the impurity type information to the impurity evaluation unit;

according to the impurity distribution information and the impurity type information, the impurity evaluation unit evaluates the cotton sliver impurity grade based on a preset evaluation model, marks an impurity key area, and sends the evaluation grade and the marked area information to the air extraction control device.

Further, in the impurity adaptive suction assisting step, the suction control means may control the suction holes of the corresponding area on the opening roller to perform suction based on the mark area information, and select the suction amount corresponding to the evaluation level based on the evaluation level.

Furthermore, impurity stripping surfaces which are obliquely arranged downwards are arranged corresponding to the impurity discharging areas of the carding cavity, and impurity absorbing openings are formed in the impurity stripping surfaces for absorbing impurities;

when impurities are discharged, an impurity stripping channel which is inclined downwards is formed at the lower part of the carding roller through the impurity stripping surface, the impurity stripping channel comprises an effective fiber area, a turning reverse suction area and a free impurity falling area from top to bottom, the impurities in the turning reverse suction area are sucked into the impurity suction channel through the impurity suction port and discharged, and the impurities in the free impurity falling area freely fall into the impurity discharge belt and are discharged.

Further, the impurity stripping surface and the horizontal plane are arranged in an angle of 60-70 degrees and inclined downwards.

The invention also provides a sundry removing and carding device of the rotor spinning machine based on air suction assistance, which comprises a carding cavity provided with a carding roller, wherein the carding cavity is communicated with a cotton sliver feeding channel and a fiber conveying channel, and a gas supplementing channel and a carding cavity sundry removing area are arranged below the corresponding carding cavity;

the carding roller is characterized in that a plurality of air suction holes are arranged on the surface of the carding roller in an array mode, the air suction holes are connected with an air suction device, and an air suction control device is connected with the air suction device and controls the air suction device;

the impurity detector is configured to detect impurity information of the cotton sliver and send a detection result to the air extraction control device when the cotton sliver is fed into the carding cavity through the cotton sliver feeding channel, wherein the impurity information comprises information of an area where the impurity is located;

the air exhaust control device is used for triggering air exhaust aiming at the area where the impurities are located, and is configured to control air exhaust holes, corresponding to the area where the impurities are located, in the carding roller according to a detection result to form negative pressure on the surface of the carding roller so as to generate auxiliary adsorption force when a cotton sliver fed into the carding chamber is carded by the carding roller, and meanwhile, the impurities mixed in the inner side of the cotton sliver are sucked away through the air exhaust holes;

the air supply channel is used for supplying air to the carding cavity when the carding roller combs the cotton sliver, and impurities or partial impurities fall into the impurity discharge belt through the impurity discharge area of the carding cavity and are discharged under the action of self gravity.

Further, the impurity detector comprises a camera, an image recognition unit and an impurity evaluation unit;

the camera is used for shooting image data of cotton slivers in the cotton sliver feeding channel and transmitting the image data to the image recognition unit; the image identification unit is used for identifying and analyzing the cotton sliver image data to acquire impurity distribution information and impurity type information in the cotton sliver and then sending the impurity distribution information and the impurity type information to the impurity evaluation unit; the impurity evaluation unit is used for evaluating the cotton sliver impurity grade and marking an impurity key area according to the impurity distribution information and the impurity type information and sending the evaluation grade and the marking area information to the air extraction control device;

the air exhaust control device can control the air suction holes of the corresponding area on the carding roller to exhaust air according to the information of the marked area, and select the air exhaust amount corresponding to the evaluation grade according to the evaluation grade.

Further, the carding roller comprises an inner cylinder fixedly arranged, an outer cylinder coaxially and rotatably arranged with the inner cylinder, and an adsorption cavity arranged between the outer cylinder and the inner cylinder;

the surface of the outer cylinder is provided with carding needles and air suction holes in an array manner, and impurities mixed in the inner side of the cotton sliver are sucked into the adsorption cavity through the air suction holes during air suction;

the inner cylinder is a hollow cavity, the hollow cavity is communicated with an air exhaust device, the wall of the inner cylinder is provided with an air vent to communicate the adsorption cavity and the hollow cavity of the inner cylinder, and when air is exhausted, air on the surface of the carding roller enters the adsorption cavity through the air suction hole and then enters the hollow cavity through the air vent to be exhausted by the air exhaust device.

Furthermore, impurity stripping surfaces which are obliquely arranged downwards are arranged corresponding to the impurity discharging areas of the carding cavity, and impurity absorbing openings are formed in the impurity stripping surfaces for absorbing impurities; an impurity stripping channel which inclines downwards is formed at the lower part of the carding roller through the impurity stripping surface, the impurity stripping channel comprises an effective fiber area, a turning back suction area and a free impurity falling area from top to bottom, impurities in the turning back suction area are sucked into the impurity suction channel through the impurity suction port and discharged, and impurities in the free impurity falling area freely fall into the impurity discharge belt and are discharged.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects as examples:

the cotton sliver impurity characteristics are detected through the impurity detector, air is pumped on the carding roller through the air suction holes according to the detection result, negative pressure is formed on the surface of the carding roller to generate auxiliary adsorption force, and impurities mixed with the inner side of the cotton sliver are sucked away through the air suction holes, so that self-adaptive impurity suction based on the cotton sliver impurity characteristics is realized, and the impurity discharging effect and the energy saving requirement are both considered.

Furthermore, the free impurity falling and accurate impurity absorption are organically combined, the impurity rolling and reverse absorption of the impurity discharging area of the carding cavity are reduced or eliminated, and the method has the characteristics of wide raw material adaptability, good yarn quality consistency and low energy consumption.

Drawings

FIG. 1 is a flow chart of a impurity removing and carding method of a rotor spinning machine based on suction assistance provided by the embodiment of the invention.

FIG. 2 is a schematic structural view of an opening roller having air suction holes according to an embodiment of the present invention.

Fig. 3 is a flowchart illustrating the operation of a trash detector for detecting a tampon according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of information transmission of the evacuation control apparatus according to the embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a impurity removing and carding device of a rotor spinning machine provided by the embodiment of the invention.

Fig. 6 is a sectional view of an impurity removal channel according to an embodiment of the present invention.

Description of reference numerals:

a trash removal carding unit 100;

a housing 110;

carding roller 120, fiber transfer area 121, outer cylinder 122, air suction hole 123, inner cylinder 124, vent 125, and transmission pipeline 126;

sliver feed channel 130;

a fiber transfer passage 140;

a gas supply passage 150;

a carding chamber impurity discharging area 160, an impurity stripping channel 161, an effective fiber area 161a, a turning back suction area 161b and a free impurity falling area 161c;

an impurity stripping surface 170, a gettering port 171, a gettering passage 172, a suction pipe 173, and an air blowing device 174;

an impurity detector 180;

an air extractor 190 and an air extraction control device 191.

Detailed Description

The impurity removing and carding method and the impurity removing and carding device based on the suction-assisted rotor spinning machine disclosed by the invention are further described in detail with reference to the attached drawings and specific embodiments. It should be noted that technical features or combinations of technical features described in the following embodiments should not be considered in isolation, and they may be combined with each other to achieve better technical effects. In the drawings of the embodiments described below, the same reference numerals appearing in the respective drawings denote the same features or components, and may be applied to different embodiments. Thus, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

It should be noted that the structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are only for the purpose of understanding and reading the present disclosure, and are not intended to limit the scope of the invention, which is defined by the claims, and any modifications of the structures, changes in the proportions and adjustments of the sizes and other dimensions, should be construed as falling within the scope of the invention unless the function and objectives of the invention are affected. The scope of the preferred embodiments of the present invention includes additional implementations in which functions may be executed out of order from that described or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.

Examples

Referring to fig. 1, the invention provides a flow chart of a impurity removing and carding method of a rotor spinning machine based on suction assistance.

The rotor spinning machine comprises a carding cavity provided with a carding roller, the carding cavity is communicated with a cotton sliver feeding channel and a fiber conveying channel, and an air supplementing channel and a carding cavity impurity discharging area are arranged below the corresponding carding cavity. During spinning, cotton slivers are fed into the carding chamber through the cotton sliver feeding channel to be carded, and carded fibers enter the interior of the rotor through the fiber conveying channel, then come out of the condensation groove, are drawn into the false twisting disc and are made into yarns.

In this embodiment, the impurity removing and carding method specifically includes the following steps:

s100, impurity detection: when a cotton sliver is fed into the carding chamber through the cotton sliver feeding channel, impurity information of the cotton sliver is detected by an impurity detector arranged in the cotton sliver feeding channel, and a detection result is sent to the air exhaust control device, wherein the impurity information comprises information of an area where the impurity is located.

The corresponding cotton sliver feeding channel is provided with an impurity detector which is electrically connected or in communication connection with the air exhaust control device.

The impurity information may further include impurity basic attribute information such as impurity name information and impurity type information. The impurity information may be from a preset impurity evaluation model. The impurity evaluation model may be, by way of example and not limitation, a mapping model established based on information such as an impurity image and an impurity photoreaction characteristic (including anisotropy, light absorption performance, optical rotation behavior, and the like) of an existing common impurity, and thus, based on the input impurity image and/or the collected impurity photoreaction characteristic information, basic attribute information such as a corresponding impurity name, an impurity type, and the like may be obtained through the impurity evaluation model.

S200, impurity self-adaptive air suction auxiliary step: when the cotton sliver fed into the carding cavity is carded by the carding roller, according to the detection result, the air exhaust control device controls the air suction holes corresponding to the region where the impurities are located on the carding roller to exhaust air to form negative pressure on the surface of the carding roller so as to generate auxiliary adsorption force, and meanwhile, the impurities mixed on the inner side of the cotton sliver are sucked away through the air suction holes.

And a plurality of air suction holes are arranged on the surface array of the carding roller and are connected with an air suction control device. The air exhaust control device is connected with the air exhaust device and controls the air exhaust device. Specifically, by way of example and not limitation, the air exhaust control device may adjust the opening and closing of the air exhaust device, the air exhaust path (a valve may be set as required to perform multi-pipeline adjustment), the air exhaust flow rate, and the like as required. The air pumping device 190 is preferably an air pump.

The arrangement mode of the air suction holes on the carding roller can be various arrays such as a matrix array, a quincuncial array, a hexagonal array and the like, and the specific shape of the array should not be taken as a limitation to the invention.

Preferably, the air suction holes on the carding roller are divided into a plurality of areas, each area is provided with one or more air suction holes, and the air suction control device can control the air suction area and/or the air suction amount of the carding roller according to the detection result.

The air extraction amount may be an air extraction amount per unit time and/or a total air extraction amount.

In a preferred embodiment, referring to fig. 2, the carding roller 120 is a double-layer cylinder structure layer, and comprises an inner cylinder 124 fixedly arranged, an outer cylinder 122 coaxially and rotatably arranged with the inner cylinder 124, and an adsorption cavity arranged between the outer cylinder 122 and the inner cylinder 124.

The outer cylinder 122 is provided with array of carding needles (not shown) and air suction holes 123 on the surface, and the air suction holes 123 are connected with an air suction device 190 through an air suction control device 191. During air suction, impurities mixed in the inner side of the cotton sliver can be sucked into the adsorption cavity through the air suction holes 123.

The inner cylinder 124 is a hollow cavity that can be connected to an air extractor 190 via a transfer line 126. The wall of the inner cylinder 124 is provided with a vent 125 to communicate the adsorption chamber with the hollow cavity of the inner cylinder. During air suction, air on the outer surface of the carding roller enters the adsorption cavity through the air suction hole 123, then enters the hollow cavity through the vent hole 125 on the inner cylinder 124, and is sucked away by the air suction device 190 through the transmission pipeline 126. The air extractor 190 can be disposed at one end or both ends of the hollow cavity of the inner cylinder 124 and is in communication with the hollow cavity. In order to make the impurities remain in the adsorption cavity, an adhesion layer can be arranged in the adsorption cavity to adhere the impurities entering the adsorption cavity. The adhesive layer includes, but is not limited to, one or more of barb adhesion, adhesive/sheet adhesion, electromagnetic adhesion. Preferably, the adhesion layer is detachably mounted in the adsorption cavity, and when the adhesion layer cannot adhere impurities, the adhesion layer can be detached and replaced by a new adhesion layer.

Preferably, the air pumping control device 191 comprises a controller arranged on an air pump or an air transmission pipeline, and the air pump or the air transmission pipeline can act on the corresponding air suction holes under the control of the controller. In one embodiment, the suction holes in one zone are in a group, and each group of suction holes can be controlled by an independent controller. For example, but not by way of limitation, the suction holes of the carding roller are divided into n regions, including the suction holes of the 1 st region, the suction holes of the 2 nd region, the suction holes of the two other regions, and the suction amount of each suction hole of each region is controlled by an independent controller, and all the controllers are connected with the main control part of the suction control device 191. The main control part of the air exhaust control device can evaluate a target area corresponding to the cotton sliver entering the carding roller according to the cotton sliver impurity information detected by the impurity detector, and then control the air suction holes corresponding to the target area to exhaust air. Referring to fig. 2, for example, 9 suction holes in a dashed circle are suction holes of region 1, when the estimated impurities in the tampon are located in this region, the main control part of the suction control device 191 sends a suction instruction to the controller of the suction holes of region 1, the air pump corresponding to the suction holes of region 1 is started or the air transmission pipeline is opened, and suction is started, so that the impurities trapped inside the tampon can be sucked into the aforementioned suction chamber through the suction holes 123.

So, when the silver was combed through high-speed rotatory carding roller 120, can start air exhaust device, bleed air inlet 123 through air exhaust device 190, the ambient air on carding roller surface has been taken away and has been formed the negative pressure, and the negative pressure produces supplementary adsorption affinity to the silver on carding roller surface, simultaneously, still siphons away the impurity that the silver inboard was mingled with through air inlet 123. The inner side of the cotton sliver refers to the side of the cotton sliver close to the carding roller, and the side close to the carding roller is called the inner side in the invention because the cotton sliver entering the carding roller for carding has a certain thickness, and the side far away from the carding roller is called the outer side in the invention.

The air suction holes 123 can also be provided with a pressure sensor, the pressure sensor is used for monitoring the air pressure of the air suction holes 123 and feeding back the detected value of the air pressure to the controller, and the controller in the corresponding area can adjust the air suction amount and/or the total air suction amount in unit time according to the air pressure.

S300, impurity removing and carding: the auxiliary step of self-adaptive air suction is carried out simultaneously with the impurity self-adaptive air suction, when the cotton sliver is combed by the carding roller, air is supplied to the carding cavity through the air supply channel, and the impurities or part of the impurities fall into the impurity discharge belt through the impurity discharge area of the carding cavity and are discharged under the action of self gravity.

Preferably, the foreign substance detector includes a camera, an image recognition unit, and a foreign substance evaluation unit. Referring to fig. 3, the steps of detecting the foreign material information of the tampon using the foreign material detector are as follows:

s110, shooting image data of the cotton sliver in the cotton sliver feeding channel through a camera, and transmitting the cotton sliver image data to an image recognition unit.

And S120, the image identification unit identifies the cotton sliver image data, acquires impurity distribution information and impurity type information in the cotton sliver, and sends the impurity distribution information and the impurity type information to the impurity evaluation unit.

S130, according to the impurity distribution information and the impurity type information, the impurity evaluation unit evaluates the cotton sliver impurity grade based on a preset evaluation model, marks an impurity key area, and sends the evaluation grade and the marked area information to the air extraction control device.

Preferably, in the impurity adaptive suction assisting step S200, the suction control means 191 may control the suction holes 123 of the corresponding region of the opening roller 120 to perform suction based on the mark region information, and may select a suction amount corresponding to the evaluation level based on the evaluation level. By way of example and not limitation, referring to fig. 4, for example, the suction holes of the carding roll are divided into n regions (n is an integer of 2 or more), which are the suction holes of the 1 st region, the suction holes of the 2 nd region, the suction holes of the 1 nd region, the suction holes of the 2 nd region, and the suction holes of the nth region, and the suction amount is divided into n levels, which are the suction amount Q1, the suction amount Q2, the. Firstly, the air extraction control device triggers a starting instruction (area control instruction) for the 1 st area air suction hole corresponding to the area where the impurities are located according to the marked area information, and selects the air extraction quantity Q2 (air extraction flow control instruction) corresponding to the evaluation grade according to the evaluation grade, namely, the 1 st area air suction hole is controlled to extract air to the area where the impurities are located in the cotton sliver according to the air extraction quantity Q2.

In the embodiment, considering that light impurities with light weight such as short fibers are close to the fiber conveying area and are easy to suck back to the carding cavity after being accumulated in the stripping area under the action of fiber conveying negative pressure airflow to generate turning and back suction, the impurity discharging structure combining free impurity falling and accurate impurity suction is further arranged. Specifically, the impurity removing area corresponding to the carding cavity is also provided with an impurity removing surface which is arranged obliquely downwards, and the impurity removing surface is provided with an impurity absorbing opening for absorbing impurities. In the embodiment, the impurity stripping surface and the horizontal plane are arranged in an angle of 60-70 degrees and inclined downwards, and an angle of 65 degrees is preferred.

When impurities are discharged, an impurity stripping channel which inclines downwards is formed at the lower part of the carding roller through the impurity stripping surface. Under the comprehensive action of suction force of the suction holes, centrifugal force of the carding roller, air supply supporting force and self gravity, the impurity stripping channel can comprise an effective fiber area, a turning and back-suction area and a free impurity falling area from top to bottom. The long fibers in the effective fiber area are kept in the carding cavity to participate in yarn formation. The impurities in the turning back suction area are sucked into the impurity suction channel through the impurity suction port and discharged. The impurities in the free impurity falling area fall into the impurity discharging belt freely and are discharged.

The invention also provides a trash removal and carding device of the rotor spinning machine for implementing the trash removal and carding method.

The impurity-removing and carding device of the rotor spinning machine comprises a carding cavity provided with a carding roller, wherein the carding cavity is communicated with a cotton sliver feeding channel and a fiber conveying channel, and an air supplementing channel and an impurity removing area of the carding cavity are arranged below the corresponding carding cavity. The carding roller is characterized in that a plurality of air suction holes are arrayed on the surface of the carding roller, the air suction holes are connected with an air suction device, and an air suction control device is connected with the air suction device and controls the air suction device.

The impurity detector is configured to detect impurity information of the cotton sliver and send a detection result to the air exhaust control device when the cotton sliver is fed into the carding chamber through the cotton sliver feeding channel, wherein the impurity information comprises information of an area where the impurity is located. The air exhaust control device is used for triggering air exhaust aiming at the region where the impurities are located, and is configured to control the air exhaust holes corresponding to the region where the impurities are located on the carding roller to exhaust air to form negative pressure on the surface of the carding roller so as to generate auxiliary adsorption force when the cotton sliver fed into the carding chamber is combed by the carding roller according to a detection result, and meanwhile, the impurities mixed with the inner side of the cotton sliver are sucked away through the air exhaust holes. The air supply channel is used for supplying air to the carding cavity when the carding roller combs the cotton sliver, and impurities or partial impurities fall into the impurity discharge belt through the impurity discharge area of the carding cavity and are discharged under the action of self gravity.

The impurity detector may specifically include a camera, an image recognition unit, and an impurity evaluation unit. The camera is used for shooting image data of cotton slivers in the cotton sliver feeding channel and transmitting the image data to the image recognition unit. The image identification unit is used for identifying and analyzing the cotton sliver image data to acquire impurity distribution information and impurity type information in the cotton sliver, and then sending the impurity distribution information and the impurity type information to the impurity evaluation unit. And the impurity evaluation unit is used for evaluating the cotton sliver impurity grade and marking an impurity key area according to the impurity distribution information and the impurity type information, and sending the evaluation grade and the marking area information to the air extraction control device. The air exhaust control device can control the air suction holes of the corresponding area on the carding roller to exhaust air according to the information of the marked area, and select the air exhaust amount corresponding to the evaluation grade according to the evaluation grade.

The carding roller can comprise an inner cylinder fixedly arranged, an outer cylinder coaxially and rotatably arranged with the inner cylinder, and an adsorption cavity arranged between the outer cylinder and the inner cylinder.

The surface of the outer cylinder is provided with carding needles and air suction holes in an array manner, and impurities mixed with the inner side of the cotton sliver are sucked into the adsorption cavity through the air suction holes during air suction.

The inner cylinder is a hollow cavity, the hollow cavity is communicated with an air extractor, the wall of the inner cylinder is provided with an air vent for communicating the adsorption cavity and the hollow cavity of the inner cylinder, and during air extraction, air on the surface of the carding roller enters the adsorption cavity through an air suction hole and then enters the hollow cavity through the air vent and then is extracted by the air extractor.

Preferably, impurity stripping surfaces which are obliquely arranged downwards are arranged corresponding to the impurity discharge areas of the carding cavity, and impurity suction ports are formed in the impurity stripping surfaces to suck impurities; an impurity stripping channel which inclines downwards is formed at the lower part of the carding roller through the impurity stripping surface, the impurity stripping channel comprises an effective fiber area, a turning back suction area and a free impurity falling area from top to bottom, impurities in the turning back suction area are sucked into the impurity suction channel through the impurity suction port and discharged, and impurities in the free impurity falling area freely fall into the impurity discharge belt and are discharged.

The impurity removing and combing device of the rotor spinning machine and the impurity removing structure combining the free fall impurity and the precise impurity absorption are described in detail below with reference to fig. 5 and 6.

Referring to fig. 5, the impurity discharging and carding device 100 includes a housing 110 having a carding chamber, in which carding rolls 120 are installed, and a sliver feeding passage 130 and a fiber transferring passage 140, which are respectively communicated with the carding chamber, are provided on the housing 110. During spinning, cotton slivers are sent into the carding cavity for carding through the cotton sliver feeding channel 130, and carded fibers enter the interior of the rotor through the fiber conveying channel 140, then come out from the condensation groove, are drawn into the false twisting disc and are made into yarns.

The air supply channel 150 and the impurity discharge area 160 of the carding cavity are correspondingly arranged below the carding cavity. The air supply of the carding cavity is carried out through the air supply channel 150, and the air supply direction corresponds to the lower part of the carding roller 120.

An impurity stripping surface 170 which is obliquely arranged downwards is arranged on the shell 110 corresponding to the impurity discharging area 160 of the carding cavity, and an impurity suction port 171 is arranged on the impurity stripping surface 170. In the embodiment, the impurity stripping surface and the horizontal plane are inclined downwards at an angle of 60-70 degrees, and preferably at an angle of 65 degrees.

The impurity peeling passage 161 inclined downward may be formed at a lower portion of the opening roller 120 by the impurity peeling surface 170, and the impurity peeling passage 161 may include an effective fiber region, a turn-up suck-back region, and a free fall impurity region from top to bottom. The impurities in the turning back suction area can be sucked into the impurity suction channel through the impurity suction port 171 and then discharged, and the impurities in the free falling impurity area can freely fall into the impurity discharge belt to be discharged. Preferably, the impurity suction port, the impurity suction channel and the impurity discharge area of the carding cavity are integrally formed. The front end of the gettering channel 172 is connected to the gettering port 171, or the gettering port 171 is provided as a part of the front end of the gettering channel 172. The suction pressure of the gettering channel connected to the gettering port 171 is adjustable, so that the suction pressure of the gettering channel can be increased as needed to increase the negative pressure suction of the gettering port 171 to the impurities in the reverse suction region of the roll-up.

The gettering channel 172 is preferably an L-shaped channel, the inner corner of which is rounded. The tail of the gettering channel 172 is communicated with a gettering main duct through a suction pipe 173. The cross section of the suction pipe 173 is circular, the tail end of the suction pipe 173 is provided with a tapered tail pipe with a gradually reduced caliber, and the small-caliber end of the tapered tail pipe is communicated with the impurity absorption main air pipe.

The left side of the carding roller 120 is provided with a fiber transfer area 121 for transferring the carded sliver. The fiber transfer area 121 is arranged below the fiber conveying channel 140, and the cotton sliver passes through the fiber transfer area 121 after carding and is conveyed to the rotor through the fiber conveying channel 140.

The surface of the carding roller 120 is arranged with a plurality of air suction holes 123 in an array, and the air suction holes 123 are connected with an air suction device through an air suction control device. Preferably, the air suction control device comprises a controller arranged on the air pump or the air transmission pipeline, and the air pump or the air transmission pipeline can act on the corresponding air suction holes under the control of the controller.

The corresponding cotton sliver feeding channel 130 is also provided with an impurity detector 180, and the impurity detector 180 is connected with an air exhaust control device. The air exhaust control device is connected with the air exhaust device and controls the air exhaust device. During spinning, impurity information of cotton slivers in the cotton sliver feeding channel 130 is detected by the impurity detector 180, and a detection result is sent to the air suction control device, and the air suction control device can control the air suction area and/or the air suction amount of the air suction holes 123 on the carding roller 120 according to the detection result.

Preferably, the sliver feeding passage 130 may be provided with a cotton feeding horn, a cotton feeding roller, and a cotton feeding plate, the impurity detector 180 may include a camera, an image recognition unit, and an impurity evaluation unit, and the camera is located inside the cotton feeding horn.

And the camera is used for shooting image data of cotton slivers in the cotton feeding horn and transmitting the image data to the image recognition unit. The image identification unit is used for identifying and analyzing the cotton sliver image data to acquire impurity distribution information and impurity type information in the cotton sliver and then sending the impurity distribution information and the impurity type information to the impurity evaluation unit. And the impurity evaluation unit is used for evaluating the cotton sliver impurity grade and marking the impurity key area according to the impurity distribution information and the impurity type information and sending the evaluation grade and the marking area information to the air extraction control device.

The air exhaust control device can control the air suction holes of the corresponding area on the carding roller to exhaust air according to the information of the marked area, and select the air exhaust amount corresponding to the evaluation grade according to the evaluation grade. For example, but not by way of limitation, the impurity grade of the cotton sliver preset by the impurity type is 3 grades, namely an easily-separated impurity grade, a common impurity grade and an difficultly-separated impurity grade, wherein the air extraction amount (which may be the air extraction amount at the beginning of the unit time) corresponding to the easily-separated impurity grade is the smallest, the air extraction amount corresponding to the common impurity grade is medium, and the air extraction amount corresponding to the difficultly-separated impurity grade is the largest.

Above-mentioned technical scheme that this embodiment provided can utilize image recognition technology to carry out the impurity detection to control the suction opening according to impurity testing result intelligently and bleed on the carding roller, can form the negative pressure in order to produce supplementary adsorption affinity on the one hand on the carding roller surface, can also absorb away the inboard impurity that mingles of silver through the suction opening simultaneously. Furthermore, the air suction amount corresponding to the evaluation grade can be selected according to the impurity evaluation grade, the yarn quality is improved, the intelligence of impurity removal work is improved, and the energy consumption is reduced.

Further, the impurities are discharged under the comprehensive acting forces of suction force of the suction holes, centrifugal force of the carding rollers, negative pressure suction force of impurity suction ports on the impurity stripping surface, self gravity of the impurities and the like. Referring to fig. 6, for the uppermost effective fiber area 161a, the fiber length and the unit volume weight are small, and the air supporting force and the suction force of the suction holes of the carding are larger than the combined acting force of the centrifugal force and the gravity, so that the limited fibers are kept in the carding cavity to participate in yarn formation. For the middle turning back suction area 161b, the area is mainly composed of impurities such as light impurities, short fibers and the like (because the carding air supply holding force, the suction force of the suction hole, the centrifugal force and the gravity are kept flat, the part of impurities are easy to be sucked back into the carding body, and accidental broken ends are caused). The gettering is mainly used for removing light impurities, short velvet and the like and preventing the light impurities, the short velvet and the like from being reversely absorbed back to the carding cavity after being rolled, so that the gettering negative pressure requirement is not high, and the low energy consumption is ensured. For the lower free impurity falling area 161c, the area is mainly heavy impurities such as neps, cottonseed hulls, short thread ends and the like, the unit volume weight is large, and the carding air supply supporting force and the suction force of the air suction hole are far smaller than the comprehensive acting force of centrifugal force and gravity, so that the heavy impurities and the large impurities freely fall into an impurity discharge belt to be discharged. The scheme is particularly suitable for the regenerated raw materials with more impurity content, heavy impurities, large impurities and the like in the impurities are freely discharged by combing centrifugal force, light impurities, short fibers and the like in the impurities are transferred and removed by impurity absorption, impurity turning and reverse absorption in an impurity discharge area of a combing cavity are eliminated, effective fiber yarn formation is reserved to the maximum extent, accurate impurity removal is realized, high yield is guaranteed, nep broken ends caused by impurity turning and reverse absorption are reduced, and the spinning suitability of the regenerated raw materials is improved.

In another implementation manner of this embodiment, the impurity detector may further include an impurity auxiliary determination unit. The impurity auxiliary judging unit can comprise a transmitter and a receiver which are respectively positioned at two sides of the cotton feeding horn and are correspondingly arranged, and the receiver is connected with the impurity evaluating unit.

Specifically, the transmitter can be a polarized light source, when the cotton sliver enters the cotton feeding roller through the cotton feeding horn, polarized light of the polarized light source is received by the receiver after irradiating on the cotton sliver, and when impurities exist on the cotton sliver, the impurities change the polarized light through anisotropy, so that received information of the receiver changes, and the receiver sends the received information to the impurity evaluation unit to assist in impurity judgment.

By way of example only, the emitter may include a light emitting member as a light source and a polarizer, and the light emitted from the light emitting member is converted into linearly, circularly or elliptically polarized light by the polarizer. When the polarized light is irradiated into the cotton fiber, the light is not changed, and when the polarized light is irradiated into the foreign matter (foreign matter such as plastic), the polarized light is changed due to the anisotropy of the foreign matter, and the change can be detected by the receiver. Specifically, the receiver may include a light sensor and a detector, the light sensor may detect light and transmit a detected light signal to the detector, and the detector processes the light signal and then sends the processed light signal to the impurity evaluation unit to assist in impurity determination. By way of example and not limitation, when polarized light is irradiated in cotton fiber, the light enters the light sensor and is detected by the light sensor, when polarized light is irradiated on impurities in the cotton sliver, the light is transmitted and deflected to prevent the light from being detected by the light sensor, and the time from the disappearance of the light to the redetection of the light, the transmitted cotton sliver section is the impurity existence region (i.e. the impurity existence region).

Other technical features are referred to in the previous embodiments and will not be described herein.

In the description above, the components may be selectively and operatively combined in any number within the scope of the targeted protection of this disclosure. In addition, terms like "comprising," "including," and "having" should be interpreted as inclusive or open-ended, rather than exclusive or closed-ended, by default, unless explicitly defined to the contrary. All technical, scientific, or other terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. Common terms found in dictionaries should not be interpreted as being too idealized or too impractical in the context of related art documents unless the present disclosure expressly limits them to that.

While exemplary aspects of the present disclosure have been described for illustrative purposes, those skilled in the art will appreciate that the foregoing description is by way of description of the preferred embodiments of the present disclosure only, and is not intended to limit the scope of the present disclosure in any way, which includes additional implementations in which functions may be performed out of the order of presentation or discussion. Any changes and modifications of the present invention based on the above disclosure will be within the scope of the appended claims.

Claims (4)

1. The utility model provides a rotor type open-end spinning machine arranges miscellaneous carding method based on breathe in supplementary, rotor type open-end spinning machine is including the carding chamber of installing the carding roller, the carding chamber communicates the cotton sliver and feeds for passageway and fibre transfer passage, corresponds carding chamber below and is equipped with tonifying qi passageway and the miscellaneous district of row of carding chamber, its characterized in that includes:

and (3) impurity detection: when a cotton sliver is fed into the carding chamber through the cotton sliver feeding channel, impurity information of the cotton sliver is detected by an impurity detector arranged in the cotton sliver feeding channel, and a detection result is sent to the air extraction control device, wherein the impurity information comprises information of an area where the impurity is located;

impurity self-adaptive air suction auxiliary step: when the cotton sliver fed into the carding cavity is carded by the carding roller, according to the detection result, the air exhaust control device controls the air suction holes corresponding to the region where the impurities are located on the carding roller to exhaust air to form negative pressure on the surface of the carding roller so as to generate auxiliary adsorption force, and meanwhile, the impurities mixed in the inner side of the cotton sliver are sucked away through the air suction holes;

impurity removing and carding: the self-adaptive air suction auxiliary step is carried out simultaneously with the self-adaptive air suction auxiliary step of the impurities, when the cotton sliver is combed by the carding roller, air is supplied to the carding cavity through the air supply channel, and the impurities fall into the impurity discharge belt through the impurity discharge area of the carding cavity and are discharged under the action of self gravity; the impurity stripping area corresponding to the carding cavity is provided with an impurity stripping surface which is arranged obliquely downwards, and the impurity stripping surface is provided with an impurity absorbing port for absorbing impurities; when impurities are discharged, an impurity stripping channel which is inclined downwards is formed at the lower part of the carding roller through the impurity stripping surface, the impurity stripping channel comprises an effective fiber area, a turning and reverse suction area and a free impurity falling area from top to bottom, the impurities in the turning and reverse suction area are sucked into the impurity suction channel through the impurity suction port and discharged, and the impurities in the free impurity falling area freely fall into the impurity discharge belt and are discharged;

the air suction holes in the carding roller are divided into a plurality of areas, each area is provided with one or more air suction holes, and the air suction control device can control the air suction area and/or the air suction amount of the carding roller according to the detection result;

the impurity detector comprises a camera, an image recognition unit and an impurity evaluation unit, and the impurity information of the cotton sliver is detected by the following steps: shooting image data of the cotton sliver in the cotton sliver feeding channel through a camera, and transmitting the cotton sliver image data to an image identification unit; the image identification unit identifies the cotton sliver image data, acquires impurity distribution information and impurity type information in the cotton sliver, and sends the impurity distribution information and the impurity type information to the impurity evaluation unit; according to the impurity distribution information and the impurity type information, the impurity evaluation unit evaluates the cotton sliver impurity grade based on a preset evaluation model, marks an impurity key area, and sends the evaluation grade and the marked area information to the air extraction control device;

in the impurity self-adaptive air suction auxiliary step, the air suction control device can control the air suction holes of the corresponding area on the carding roller to suck air according to the mark area information, and select the air suction amount corresponding to the evaluation grade according to the evaluation grade.

2. The method of claim 1, wherein: the impurity stripping surface and the horizontal plane are obliquely arranged downwards at an angle of 60-70 degrees.

3. A impurity removing and carding device of a rotor spinning machine based on air suction assistance, which comprises a carding chamber provided with a carding roller, wherein the carding chamber is communicated with a cotton sliver feeding channel and a fiber conveying channel, and an air supplementing channel and an impurity removing area of the carding chamber are arranged below the carding chamber, and the impurity removing and carding device is characterized in that:

a plurality of air suction holes are arranged on the surface of the carding roller in an array manner, the air suction holes are connected with an air suction device, and an air suction control device is connected with the air suction device and controls the air suction device;

the impurity detector is configured to detect impurity information of the cotton sliver and send a detection result to the air extraction control device when the cotton sliver is fed into the carding cavity through the cotton sliver feeding channel, wherein the impurity information comprises information of an area where the impurity is located;

the air exhaust control device is used for triggering air exhaust aiming at the region where the impurities are located, and is configured to control air exhaust holes corresponding to the region where the impurities are located on the carding roller to exhaust air to form negative pressure on the surface of the carding roller according to a detection result so as to generate auxiliary adsorption force when the cotton sliver fed into the carding chamber is carded by the carding roller, and meanwhile, the impurities mixed in the inner side of the cotton sliver are sucked away through the air exhaust holes;

the air replenishing channel is used for replenishing air to the carding cavity when the carding roller combs the cotton sliver, and impurities fall into the impurity discharging belt through the impurity discharging area of the carding cavity and are discharged under the action of self gravity; the impurity stripping area corresponding to the carding cavity is provided with an impurity stripping surface which is arranged obliquely downwards, and the impurity stripping surface is provided with an impurity absorbing port for absorbing impurities; an impurity stripping channel which inclines downwards is formed at the lower part of the carding roller through the impurity stripping surface, the impurity stripping channel comprises an effective fiber area, a turning and back-suction area and a free impurity falling area from top to bottom, impurities in the turning and back-suction area are sucked into the impurity suction channel through the impurity suction port and discharged, and impurities in the free impurity falling area freely fall into the impurity discharge belt and are discharged;

the impurity detector comprises a camera, an image recognition unit and an impurity evaluation unit; the camera is used for shooting image data of cotton slivers in the cotton sliver feeding channel and transmitting the image data to the image recognition unit; the image identification unit is used for identifying and analyzing the cotton sliver image data to acquire impurity distribution information and impurity type information in the cotton sliver and then sending the impurity distribution information and the impurity type information to the impurity evaluation unit; the impurity evaluation unit is used for evaluating the cotton sliver impurity grade and marking an impurity key area according to the impurity distribution information and the impurity type information and sending the evaluation grade and the marking area information to the air extraction control device;

the air exhaust control device can control the air suction holes of the corresponding area on the carding roller to exhaust air according to the information of the marked area, and select the air exhaust amount corresponding to the evaluation grade according to the evaluation grade.

4. The apparatus of claim 3, wherein: the carding roller comprises an inner cylinder fixedly arranged, an outer cylinder coaxially and rotatably arranged with the inner cylinder, and an adsorption cavity arranged between the outer cylinder and the inner cylinder;

the surface of the outer cylinder is provided with carding needles and air suction holes in an array manner, and impurities mixed in the inner side of the cotton sliver are sucked into the adsorption cavity through the air suction holes during air suction;

the inner cylinder is a hollow cavity, the hollow cavity is communicated with an air extractor, the wall of the inner cylinder is provided with an air vent for communicating the adsorption cavity and the hollow cavity of the inner cylinder, and during air extraction, air on the surface of the carding roller enters the adsorption cavity through an air suction hole and then enters the hollow cavity through the air vent and then is extracted by the air extractor.

Images