System suitable for foreign fiber detection and cleaning and cotton processing production line

Abstract

The invention discloses a system suitable for foreign fiber detection and cleaning and a cotton processing production line, and the system suitable for foreign fiber detection and cleaning comprises an image detection part which is used for detecting and removing short foreign fibers in seed cotton flow; the seed cotton flow speed adjusting device is located at the front stage of the image detection part and provided with a shell, the shell is provided with a guide-in opening and a guide-out opening used for being connected with the image detection part, the shell is gradually narrowed in the front-back direction from the guide-in opening to the guide-out opening, and an air supplementing opening is formed in the front side or the rear side of the guide-in opening; the double-layer seed cleaning machine is connected to the guide-in opening in a matched mode; the mechanical three-filament machine is positioned at the front stage of the double-layer seed cleaning machine and is used for cleaning long foreign fibers in seed cotton; before seed cotton enters the image detection part, at least one seed cotton drying device is arranged. The unginned cotton spreading device is suitable for spreading unginned cotton.

Description

Technical Field

[0001] The present invention relates to a system suitable for detecting and cleaning foreign fibers on a cotton processing production line, and the present invention also relates to a cotton processing production line having such a system. Background Art

[0002] Foreign fibers refer to non-cotton fibers mixed into cotton, such as chemical fibers, silk, hemp, hair, plastic ropes, etc. In the cotton processing production process, foreign fibers are also called "three filaments". The concept of "three filaments" appeared relatively earlier, and thus the original scope of "three filaments" was relatively small. The traditional "three filaments" include three main components: palm fibers, hemp fibers, and hair fibers. With the change of cotton harvesting methods, "three filaments" is not sufficient to cover foreign fibers. Therefore, the name "three filaments" has gradually been replaced by the more standardized "foreign fibers", but "three filaments" is still retained as a common name.

[0003] In the early days, cotton harvesting in China mainly adopted the method of manual picking. The seed cotton harvested by this method had a very low impurity content and hardly needed to be cleaned. With the large-scale popularization of machine-picked cotton, although the efficiency of cotton harvesting has been greatly improved, the impurity content of the harvested seed cotton is relatively high, and the types of impurities mixed into the seed cotton are also relatively numerous. Therefore, it is necessary to clean the seed cotton or lint at multiple stations on the cotton processing production line usually no less than seven times. One or two of these processes are used to clean foreign fibers in the seed cotton. This is because once ginning is completed, it is very difficult to clean foreign fibers. Therefore, it is necessary to clean foreign fibers before the ginning station on the cotton processing production line. A three-filament cleaning machine (executing GH / T 1064-2010, standard name: "Seed Cotton Foreign Fiber Cleaning Machine", release date: August 30, 2010, implementation date: December 1, 2010, standard status: current) is often required to be configured before the ginning station on the cotton processing production line.

[0004] The three-wire cleaning machine is usually equipped with a three-wire detection device and a cleaning device. Among them, the detection of three-wires is very mature, and there are relatively many detection methods. For example, the condition that seed cotton needs to be dried before processing, and the foreign fibers will release chemical gases during the drying process (the drying temperature is generally around 140°C, and the foreign fibers will release chemical gases when the ambient temperature is higher than 50°C). According to the difference between the components of the released chemical gas and the components released by the seed cotton, further qualitative and quantitative detection is carried out with the help of, for example, chromatography / mass spectrometer. Another example is the automatic detection and removal system for foreign fibers of optoelectronic cotton developed by the Shanghai Institute of Technical Physics, Chinese Academy of Sciences. In addition, regarding the cleaning of three-wires, in addition to manual cleaning, it is mainly mechanical cleaning. Mechanical cleaning mainly relies on the difference in the winding ability of the winding roller with the foreign fibers and cotton fibers to clean the three-wires. The cleaning method of the winding roller is mainly for the cleaning of the so-called long three-wires; another three-wire cleaning method is mainly for the cleaning of the so-called short three-wires, which mainly relies on the difference in specific surface area between the short three-wires and the seed cotton, and separates the short three-wires by impact wind and ejection. The two cleaning methods are generally used in combination.

[0005] From the above description, it can be seen that the identification and cleaning of three-wires first require that the three-wires be exposed, and the three-wire cleaning machine is generally located after at least one seed cleaning process. For example, the circulation of seed cotton between different process equipment generally adopts cotton conveying pipelines for circulation. Cotton conveying pipelines are generally round tubes, and cotton processing equipment such as seed cotton cleaning machines generally have relatively large machine radius (the lateral dimension of the functional part of the process components of cotton processing equipment. At present, for example, the machine radius of the seed cotton cleaning machine can reach up to four meters, and there is a trend of further increase). In view of this, for example, before the seed cotton is transported to the predetermined process equipment through the cotton conveying pipeline, a seed cotton distribution device needs to be set at the end of the cotton conveying pipeline to evenly disperse the seed cotton in the horizontal direction. The same is true for the three-wire cleaning machine, for example. Only when the seed cotton is evenly dispersed in the horizontal direction can the foreign fibers be fully exposed and cleaned. The current detection and cleaning of foreign fibers is faced with the problem of how to fully expose and clean the foreign fibers.

[0006] Since the foreign fibers have a very significant impact on the quality of lint cotton, the lint cotton produced by manually picking foreign fibers is 300 to 600 yuan more expensive per ton than that produced by machine-identifying and cleaning foreign fibers, which also shows the impact of foreign fibers on the quality of lint cotton. In recent years, major cotton processing machinery manufacturers have generally increased their research on foreign fiber identification and cleaning. In some implementations, an independent cotton spreading module is configured in front of the foreign fiber detection station to evenly spread the unginned cotton before it enters the foreign fiber detection station. In such implementations, the cotton spreading module receives the unginned cotton conveyed by the impurity removal dust cage from the unginned cotton loosening device, and then spreads the unginned cotton flat on the cotton mesh conveyor belt. The cotton mesh conveyor belt is equipped with a weighing module to control the amount of unginned cotton entering the cotton mesh conveyor belt, so as to ensure that the unginned cotton can be evenly spread. At the same time, a number of steel wire brushes are provided above the cotton mesh conveyor belt to comb and spread the unginned cotton distributed on the cotton mesh conveyor belt. In such implementations, a loosening and cleaning section, a cotton storage box, a conveying and cleaning section, a spike roller cleaning section, etc. are sequentially configured above the cotton mesh conveyor belt from top to bottom. The pre-stage process flow of the cotton mesh conveyor belt is complex, and it occupies a relatively large vertical space, restricting its application range, and the spreading effect of the unginned cotton relying solely on the cooperation of the horizontally placed cotton mesh conveyor belt and the steel wire brushes is not good. Summary of the Invention

[0007] In view of this, an object of the present invention is to provide a system suitable for facilitating the spreading of unginned cotton, thereby contributing to the detection and cleaning of foreign fibers. The present invention also provides a cotton processing production line having such a system.

[0008] According to the first aspect of the embodiments of the present invention, there is provided a system suitable for the detection and cleaning of foreign fibers, including: An image detection unit for detecting and removing short foreign fibers in the unginned cotton stream; An unginned cotton flow rate regulating device located at the pre-stage of the image detection unit, having a housing with an inlet and an outlet for connecting to the image detection unit. The housing gradually narrows in the front-rear direction from the inlet to the outlet, and an air supply opening is provided on the front side or the rear side of the inlet; A double-layer seed cleaner connected to the inlet; and A mechanical foreign fiber cleaner located at the pre-stage of the double-layer seed cleaner for cleaning long foreign fibers in the unginned cotton; Before the unginned cotton enters the image detection unit, at least one unginned cotton drying device is adapted.

[0009] Optionally, the housing of the unginned cotton flow rate regulating device is surrounded by a front wall, a rear wall and left and right side walls, and an upper opening and a lower opening are determined, where the lower opening constitutes the outlet; The upper opening is separated in the front-rear direction to form the inlet and the air supply opening; Among them, the air supply opening has an opening degree adjusting mechanism or structure.

[0010] Optionally, the rear wall is a vertical plate, and the front wall is an arc-shaped plate or an inclined plate forming a given angle with the rear wall, so as to form the structure gradually narrowing in the front-rear direction; Correspondingly, the air supply make-up opening is located on the front side of the air guiding inlet; If it is an inclined plate, the lower end of the inclined plate has an arc transition part.

[0011] Optionally, in the front-rear direction, the length ratio of the air guiding outlet to the air guiding inlet is 3:10 to 3.5:10; The length ratio of the air supply make-up opening to the air guiding inlet is 8.1:10 to 8.7:10.

[0012] Optionally, the air supply make-up opening is shielded with a perforated plate; The air supply make-up opening is provided with a valve plate in the front-rear direction, and a structure or mechanism for adjusting the valve plate in the front-rear direction.

[0013] Optionally, the image detection part includes: A main body part, the cross section of which is rectangular and is used for receiving the air guiding outlet; A unginned cotton outlet pipe, which is connected to the outlet of the main body part; A waste cotton outlet pipe, which is vertically connected to the front side or the rear side of the middle part of the main body part; An air supply make-up pipe, which is parallel to the waste cotton outlet pipe to supply air to the main body part from the upper side and / or the lower side of the waste cotton outlet pipe.

[0014] Optionally, one end of the air supply make-up pipe located on the upper side of the waste cotton outlet pipe connected to the main body part is parallel to the main body part and is vertically connected to the end part where the waste cotton outlet pipe is connected to the main body part; The air supply make-up pipe located on the lower side of the waste cotton outlet pipe is vertically connected to the main body part; The flow cross-sectional area of the air supply make-up pipe located on the upper side of the waste cotton outlet pipe is smaller than the flow cross-sectional area of the air supply make-up pipe located on the lower side of the waste cotton outlet pipe.

[0015] Optionally, the image detection part, the unginned cotton flow rate adjusting device, the double-layer unginned cotton cleaner and the lower suction inclined unginned cotton cleaner in front of the double-layer unginned cotton cleaner are arranged from bottom to top at the same station in the workshop.

[0016] Optionally, in front of the lower suction inclined unginned cotton cleaner, there are a purification unginned cotton cleaner, a mechanical three-wire cleaner and an unginned cotton separator arranged from bottom to top at the first station in the workshop, and there is a unginned cotton drying device between the purification unginned cotton cleaner and the mechanical three-wire cleaner; There is a second unginned cotton drying device between the first station and the lower suction inclined unginned cotton cleaner.

[0017] According to the second aspect of the embodiments of the present invention, there is provided a cotton processing production line, including the system suitable for detecting and cleaning foreign fibers according to the first aspect of the embodiments of the present invention.

[0018] The system suitable for detecting and cleaning foreign fibers according to the embodiments of the present invention, by screening suitable cotton processing equipment, arranges a double-layer seed cleaner in the front stage of the image detection unit. While removing impurities, the double-layer seed cleaner can more effectively break up the unginned cotton and disperse the unginned cotton laterally sufficiently, so that the unginned cotton can be evenly dispersed laterally before being fed into the image detection unit, and the foreign fibers can be fully exposed. Furthermore, through the combing of the unginned cotton flow rate adjusting device, the unginned cotton flow is fed into the image detection unit in a relatively thin and uniform manner, which is beneficial to the cleaning of short foreign fibers. Since the double-layer seed cleaner is an inherent configuration of the cotton processing production line, in other words, the present invention utilizes this inherent configuration to play the role of loosening the unginned cotton and evenly spreading the unginned cotton laterally, without the need to configure independent loosening equipment and mechanical spreading equipment in front of the image detection unit, reducing the use of processing equipment and the occupation of workshop space. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of a short foreign fiber detection and cleaning system in an embodiment.

[0020] Figure 2 It is a schematic structural diagram of the adaptation of the unginned cotton flow rate adjusting device and the image detection unit in an embodiment.

[0021] Figure 3 It is a schematic three-dimensional structural diagram of the unginned cotton flow rate adjusting device in an embodiment.

[0022] Figure 4 It is a schematic structural diagram of the air supply cover plate in an embodiment.

[0023] Figure 5 It is a schematic structural diagram of the perforated plate in an embodiment.

[0024] Figure 6 It is a schematic structural diagram of the inner cavity of the unginned cotton flow rate adjusting device in an embodiment.

[0025] Figure 7 It is a flow chart of the cotton processing production line in the first embodiment.

[0026] Figure 8 It is a flow chart of the cotton processing production line in the second embodiment.

[0027] In the figure: 1. Brush roller, 2. Double-layer seed cleaner, 3. Lower cotton guiding plate, 4. Upper sixth spike roller, 5. Upper cotton guiding plate, 6. Upper cleaning section, 7. Upper grid bar, 8. Inlet section, 9. First cotton inlet pipe, 10. Separator, 11. Second cotton inlet pipe, 12. Lower suction inclined seed cleaner, 13. Waste outlet cavity, 14. Upper first spike roller, 15. Upper cotton outlet, 16. Lower cleaning section, 17. Cotton flowing plate, 18. Lower first spike roller, 19. Lower cotton outlet, 20. Lower waste flowing plate, 21. Double-layer cotton outlet pipe, 22. Seed cotton flow rate regulating device, 23. Image detection section, 24. Lower waste discharging spiral auger, 25. Lower ash hopper, 26. Upper waste discharging spiral auger, 27. Upper ash hopper, 28. U-shaped rack roller, 29. Image detection section housing, 30. Lower air supply pipe, 31. Seed cotton, 32. Upper air supply pipe, 33. Flattening section, 34. Cotton arranging cavity, 35. Inlet, 36. Air supply opening, 37. Air supply cavity, 38. Waste cotton outlet pipe, 39. Seed cotton outlet pipe, 40. Side wall, 41. Observation window, 42. Inlet, 43. Adjusting seat, 44. Air supply cover plate, 45. Perforated plate, 46. Front wall, 47. Adjusting hole, 48. Plate body, 49. Flange, 50. Handle, 51. Ventilation hole, 52. Fixing hole, 53. Outlet hole, 54. Rear wall. Detailed implementation mode

[0028] It should be known that for cotton processing equipment, it has definite front, back, left, right, up and down. Specifically, the direction corresponding to the machine width of the cotton processing equipment is its transverse direction, and the transverse direction is also called the left-right direction or the width direction.

[0029] In a predetermined reference plane, the direction perpendicular to the left-right direction is the front-back direction, and the front-back direction is also called the longitudinal direction or the length direction. Generally, one direction of the front-back direction is usually opposite to the operator's habitual control state, and this direction is the front.

[0030] The direction perpendicular to the reference plane is the vertical direction, and the vertical direction is also called the height direction.

[0031] It should be noted that for the front-back direction, for example, it does not require to be exactly in the front or the back, but is generally consistent in orientation.

[0032] Figure 7 and Figure 8 The description of the working position in [reference] refers to the predetermined space corresponding to a set of vertical process equipment in a predetermined space.

[0033] It should be known that long and irregular fibers refer to continuous non-cotton fibers mixed in cotton, such as uncut chemical fiber filaments, plastic films, complete hairs, etc. They have regular shapes and longer lengths, and have obvious continuity compared with cotton fibers. At present, the cleaning method for long and irregular fibers is to use a mechanical three-wire machine to wind and clean them.

[0034] Short heterotypic fibers refer to non-cotton fiber segments that are cut or broken, such as short chemical fibers, hair fragments, and hemp scraps. They are relatively short in length (usually in the millimeter to centimeter range), irregular in shape, and highly dispersed. Due to their small size, it is difficult to clean them by winding, but their specific surface area is relatively large, so they can be cleaned by wind power.

[0035] It should be known that for the cleaning of heterotypic fibers, no matter which mechanical cleaning method for heterotypic fibers is used currently, it cannot clean them completely. In other words, the system suitable for detecting and cleaning heterotypic fibers based on the embodiments of the present invention also cannot achieve complete cleaning. This is also a typical feature of mechanical cleaning of heterotypic fibers, and higher requirements should not be put forward for the present invention. Currently, the mechanical cleaning of heterotypic fibers is still to reduce the content of heterotypic fibers in unginned cotton 31 as much as possible, rather than achieving complete cleaning.

[0036] It should be noted that regarding the improvement points of the system suitable for detecting and cleaning heterotypic fibers based on the embodiments of the present invention, compared with the existing cleaning methods (except manual cleaning), the cleaning rate of short heterotypic fibers is relatively higher.

[0037] In the embodiments of the present invention, the system suitable for detecting and cleaning heterotypic fibers is a collection of some process equipment of a cotton processing production line. It is located in front of the gin and behind the cotton feeder, and can be a collection of process equipment between the gin and the cotton feeder.

[0038] In the embodiments of the present invention, Figure 1 The illustrated structure is the main body of the system suitable for detecting and cleaning heterotypic fibers, and can also be used as the system itself alone. The minimum unit of this system includes the double-layer seed cleaner 2 (fully called double-layer unginned cotton cleaner) shown in the figure, the unginned cotton flow rate adjusting device 22, the image detection unit 23, and the connection structure adapted for the configuration of these three process equipment at the same working station.

[0039] As mentioned above, the basic principle of the present invention is to further dry the unginned cotton 31 on the basis of cleaning long heterotypic fibers, and then send it to the double-layer seed cleaner 2 for cleaning. Taking advantage of the condition that the double-layer seed cleaner 2 can fully disperse the unginned cotton (replacing the opening equipment), the unginned cotton exported from the double-layer seed cleaner 2 is combed and then sent to the image detection unit 23, and then the short heterotypic fibers mixed in the unginned cotton 31 are cleaned out by wind power.

[0040] Among them, the double-layer seed cleaner 2 is mainly used to fully disperse the unginned cotton 31. And during the process of cleaning the unginned cotton 31, the flow of unginned cotton 31 will also extend to both sides, so that the unginned cotton 31 is more evenly dispersed horizontally in the double-layer seed cleaner 2, thus preventing the unginned cotton 31 from being too thick locally and making its overall thickness relatively uniform, which is beneficial to the full exposure of short heterotypic fibers.

[0041] In view of this, the double-layer seed cleaner 31 will be fully described as follows: As mentioned above, since most of the current raw cotton comes from mechanical harvesting, the impurity content in the raw cotton is very high. In view of this, the entire cotton processing production line often needs to be cleaned more than six times, including at least four times of seed cotton cleaning and usually not less than one time of lint cleaning. At present, the double-layer seed cleaner 21 is also a common process equipment.

[0042] For the convenience of overall description, in Figure 1 the illustrated structure, the down-draft inclined seed cleaner 12 (fully named down-draft inclined seed cotton cleaner), the double-layer seed cleaner 2, the seed cotton flow rate adjusting device 22 and the image detection unit 23 are arranged at the same station. The seed cotton 31 is dried twice before entering the down-draft inclined seed cleaner 12. The relatively dry seed cotton 31 has a reduced ability to entrap impurities, which is beneficial to the removal of impurities.

[0043] Refer to Figure 1 , after being cleaned by the down-draft inclined seed cleaner 12, under the combined action of the spike roller and the grid bar arranged in the down-draft inclined seed cleaner 12, most of the impurities such as sterile seeds, broken cotton stalks, broken cotton leaves and dust are discharged. The seed cotton cleaned by the down-draft inclined seed cleaner 12 falls into the double-layer seed cleaner 21, and the upper cleaning part 6 and the lower cleaning part 16 of the double-layer seed cleaner 21 use the screening principle of the spike roller and the grid bar to separate impurities from the seed cotton.

[0044] As mentioned above, the seed cotton 31 is generally transported through a circular pipeline, and the diameter of the circular pipeline is much smaller than the machine width of the seed cotton cleaner. Therefore, a triangular box or other seed cotton distribution devices are often equipped at the inlet of the seed cotton cleaner to facilitate the dispersion of the seed cotton 31 in the machine width direction, but it will still cause the problem that the stacking thickness of the seed cotton 31 in the middle of the machine width is relatively large and the amount of seed cotton on both sides is relatively small. Under the continuous beating of the spike roller, the relatively thick seed cotton flow in the middle will extend to both sides, so that the thickness of the seed cotton 31 in the transverse direction becomes gradually uniform.

[0045] The unginned cotton 31 freely falls onto the spike roller directly below the cleaning section 6 from the inlet section 8 of the double-layer unginned cotton cleaner 21. Due to the high-speed rotation of the spike roller, the unginned cotton 31 is immediately sent to the upper surface of the grid bar. The spikes of the spike roller penetrate into the interior of the unginned cotton mass, hooking and hitting the unginned cotton mass, so that the internal bonding force of the unginned cotton mass is damaged and loosened. As the spike roller of the upper cleaning section 6 rotates, the unginned cotton mass rotates and rubs on the surface of the upper grid bar 7 while moving forward along the upper grid bar 7, and the impurities in the unginned cotton 31 are continuously screened out. As the spike roller rotates, the continuously loosened unginned cotton 31 is thrown to the upper sixth spike roller 4 at the rear end of the upper cleaning section 6, and the unginned cotton 31 is brought into the cleaning channel of the upper grid bar 7 by the spike roller along the upper cotton guiding plate 5. The unginned cotton mass rotates and rubs on the surface of the grid bar below the upper sixth spike roller 4 while moving forward along the grid bar, and then the upper sixth spike roller 4 throws it to the upper fifth spike roller, repeating the above actions, and it is thrown to the upper fourth, third, second, and first spike rollers. After processes such as hitting, relative friction, and rolling between the six spike rollers and the grid bar combination in the upper cleaning section 6, the impurities are discharged from the upper grid bar 7, and the upper lint cleaning process is completed. Then the unginned cotton 31 falls into the lower cleaning section 16 from the upper cotton outlet 15.

[0046] Because a grid bar structure with a relatively large gap is set in the upper cleaning section, it is more convenient for the discharge of impurities. During the impurity discharge process, some small flower heads are discharged at the same time and enter the recovery section through the upper impurity draining plate. The recovery section uses wiping, shaking, and inertial centrifugal force to recover the fallen small flower heads. These small flower heads are recovered and purified, and then returned to the unginned cotton flow in the upper cleaning section 6, reducing unnecessary losses. The recovered small flower heads and effective fibers are transmitted to the spike roller of the recovery section by the brush roller, and the spike roller of the recovery section throws the small flower heads and effective fibers into the unginned cotton flow in the upper cleaning section 6.

[0047] When the unginned cotton 31 moves to the end face of the grid bar under the upper sixth spike roller 4, it is thrown out along the tangent direction of the end face of the grid bar, and falls onto the cotton flow plate 17 by its own weight from the upper cotton outlet, and then slides down to the upper part of the first spike roller 18 at the front end of the lower cleaning part 16, falling into the lower cleaning part. Due to the grid bar structure with relatively small gaps set in the lower cleaning part, it can discharge impurities and prevent small flower heads from falling. The unginned cotton 31 discharged from the upper cleaning part is thrown by the first spike roller 18 at the lower layer at the front end of the lower cleaning part 16 to the second spike roller at the lower layer, repeating the above actions, and is then thrown to the third, fourth, fifth, and sixth spike rollers at the lower layer. When the continuously loosened unginned cotton 31 is thrown to the sixth spike roller at the lower layer in the lower cleaning part 16, the unginned cotton 31 moves along the lower cotton guiding plate and is taken by the spike roller into the cleaning channel of the lower grid bar. As the spike roller in the lower cleaning part 16 rotates, the cotton mass rotates and rubs on the surface of the lower grid bar while moving forward along the grid bar, and the impurities in the unginned cotton 31 are continuously screened out. The unginned cotton 31 is thrown by the sixth spike roller at the lower layer in the lower cleaning part 16 to the fifth spike roller at the lower layer, repeating the above actions, and is then thrown to the fourth, third, second, and first spike rollers at the lower layer. When the unginned cotton 31 moves to the triangular steel grid bar sieve under the first spike roller 18 at the lower layer in the lower cleaning part 16, it is thrown out along the tangent direction of the sieve, and the impurities enter the lower waste discharge spiral auger 24 through the lower waste discharge plate 20. The evenly distributed and loose single-grain unginned cotton after cleaning enters the unginned cotton flow rate regulating device 22 by gravity along the lower cotton outlet 19.

[0048] In the above process, most of the remaining impurities such as barren seeds, boll shells, cotton stalks, leaf debris, dust, and dead cotton petals are discharged through the mesh holes of the grid bar and fall into the lower waste discharge spiral auger, and are then output outside the machine. More importantly, the unginned cotton 31 is fully loosened by the continuous beating of the double-layer unginned cotton cleaner 2, and in the transverse direction, the thickness of the cotton layer also becomes relatively uniform.

[0049] Regarding the image detection part 23, its main structure is a known configuration. It mainly detects the short foreign fibers mixed in the unginned cotton 31, and then, by means of the difference in specific surface area between the short foreign fibers and the unginned cotton 31, blows out the short foreign fibers from the unginned cotton 31, and then discharges them from Figure 2 the waste cotton outlet pipe 38 illustrated in. And the unginned cotton 31 after being cleaned of short foreign fibers is discharged from Figure 2 the unginned cotton outlet pipe 39 illustrated in.

[0050] After being cleaned by the double-layer unginned cotton cleaner 2, the unginned cotton 31 is fully loosened while cleaning other impurities, and through transverse homogenization, the thickness distribution of the unginned cotton flow is relatively uniform in the transverse direction, thus minimizing the thickness of the unginned cotton flow to the greatest extent, which is conducive to the full exposure of short foreign fibers and thus conducive to the removal of short foreign fibers by air cleaning.

[0051] Opening itself can also cause the unginned cotton 31 to become scattered and lead to uneven feeding. Therefore, a device 22 for adjusting the flow rate of unginned cotton is provided, and the device 22 for adjusting the flow rate of unginned cotton is arranged between the double-layer seed cleaner 2 and the image detection unit 23 for carding the unginned cotton flow.

[0052] Correspondingly, the housing of the device 22 for adjusting the flow rate of unginned cotton has an inlet 35 and an outlet 53 for connecting to the image detection unit 23. From Figure 2 、 Figure 3 and Figure 6 it can be seen that the housing gradually narrows in the front-rear direction from the inlet 35 to the outlet 53 for gathering the unginned cotton in the front-rear direction to make the feeding of the unginned cotton 31 uniform.

[0053] And in Figure 2 、 Figure 3 and Figure 6 in the exemplified structure, an air supply opening 36 is provided on the front side of the inlet 35 to facilitate carding the unginned cotton flow. The air supply opening 36 can also be arranged on the rear side of the inlet 35.

[0054] The device 22 for adjusting the flow rate of unginned cotton will be described in detail below: In Figure 3 and Figure 6 in the exemplified structure, the device 22 for adjusting the flow rate of unginned cotton includes an unginned cotton inlet channel (with an inlet 35), an air supply channel (with an air supply opening 36), an unginned cotton outlet channel (with an outlet 53), an observation and maintenance door (arranged on the side wall 40 and having an observation window 41), an air supply cover plate 44 arranged at the air supply opening 36, and an adjusting structure or mechanism for adjusting the position of the air supply cover plate 44. Regarding the housing of the device 22 for adjusting the flow rate of unginned cotton, front and rear panel assemblies, left and right wall panel assemblies, etc. are adapted.

[0055] After being cleaned by the double-layer seed cleaner 2, the unginned cotton 31 presents single unginned cotton with relatively uniform and loose properties, making it easy to separate the foreign fibers from the unginned cotton 31. The single unginned cotton enters the device 22 for adjusting the flow rate of unginned cotton along the double-layer cotton outlet pipe 21 by gravity. The double-layer cotton outlet pipe 21 is a rectangular pipe, and the width of the rectangular pipe is the same as the machine width of the double-layer seed cleaner 2 and is further connected to the inlet 35.

[0056] Since the conveying of materials on the cotton processing production line mainly relies on wind power, see Figure 8 , with the negative pressure adsorption effect of the downward suction inclined seed cleaner of the unginned cotton outlet pipe 39 at the next station of the image detection unit 23 and connected to the image detection unit 23, and then adjusting the air supply through the air supply channel to adjust the flow rate of the unginned cotton 31. After the flow rate of the unginned cotton 31 is reasonably stable, tighten the fixing screws of the air supply cover plate 44. Make the unginned cotton 31 with stable and uniform flow rate and loose state pass through the transparent detection channel of the LED fusion light source installed in the image detection unit 23.

[0057] See Figures 3 - 5 , at the air make-up port 36 of the unginned cotton flow rate adjusting device 22, a perforated plate 45 is installed. The perforated plate 45 has a certain filtering effect to prevent larger sundries from entering the air make-up chamber 37. Further, an air make-up cover plate 44 is provided at the air make-up port, and the flow rate entering the air make-up chamber through the air make-up port 36 is adjusted by adjusting the shielding amount of the perforated plate 45 by the air make-up cover plate 44.

[0058] Among them, the perforated plate 45 can be fixed at the air make-up port 36 using, for example, screws, completely shielding the air make-up port 36, and it is a fixedly arranged component.

[0059] In Figure 3 the illustrated structure, an air make-up cover plate 44 is installed outside the perforated plate 45. The position of the air make-up cover plate 44 is adjustable in the front-back direction. As Figure 4 shown, an adjustment hole 47 is formed on the air make-up cover plate 44. The force generated by the air make-up on the air make-up cover plate 44 is a suction force that joins the air make-up cover plate 44 to the air make-up port 36. Therefore, for the air make-up cover plate 44, its fixation is relatively simple, or rather, the requirement for reliability is relatively low. Therefore, even if only a pair of screws is used, the expected fixation purpose can be achieved.

[0060] Figure 3 Among them, in addition to the side frames on both sides of the air make-up port 36, an adjustment seat 43 is also provided in the middle of the air make-up port 36. The adjustment seat 43 actually only plays a supporting role in the figure. The part mainly used to fix the air make-up cover plate 44 is the functional frame of the air make-up port 36. Holes can also be formed on the adjustment seat 43 for adjusting the fixation of the adjustment seat 43.

[0061] In some embodiments, the adjustment of the air make-up cover plate 44 can also be achieved by using a mechanism for adjustment. For example, a nut-screw mechanism is provided to drive the adjustment of the air make-up cover plate 44 in the front-back direction.

[0062] The linear array cameras on both sides of the detection channel of the image detection unit 23 scan the unginned cotton flow, and the collected image data is transmitted to the industrial computer in real time. The industrial computer uses a given detection algorithm to detect foreign fibers and locate them; and controls the compressed gas jetting unit according to the analysis result, and sprays the identified various foreign fibers into the waste cotton outlet pipe 38 and discharges them from the waste cotton outlet pipe 38.

[0063] Since the detection of foreign fibers belongs to a mature technology and is not the content improved by the present invention, it will not be elaborated here.

[0064] Figure 2In it, an upper air supply duct 32 and a lower air supply duct 30 are provided on the upper and lower sides of the waste cotton outlet duct 38. These two air supply ducts can be air ducts with natural air intake or forced air intake, such as compressed air. In the embodiments of the present invention, the fan for providing compressed air preferably uses a ventilator, a blower, a compressor or a Roots blower, and does not include positive displacement blowers and compressors, such as piston compressors, etc.

[0065] The cross-sectional area of the flow passage of the upper air supply duct 32 is smaller than the cross-sectional area of the flow passage of the lower air supply duct 30. Through the combing of the air flow, short and irregular fibers can be more easily blown into the waste cotton outlet duct 38 with a relatively small cross-sectional area.

[0066] In addition, in Figure 2 In the illustrated structure, the pipe body part corresponding to the flattening part 33 of the image detection part 23 is a main pipe arranged vertically, and the unginned cotton runs from top to bottom, which is hereinafter simply referred to as the main part. The cross-section of this main part is rectangular, or forms a rectangular pipe, and is used to receive the outlet 53.

[0067] The unginned cotton outlet duct 39 of the image detection part 23 is connected to the outlet of the main part. In the figure, the unginned cotton outlet duct 39 is connected to the main part by a bent pipe, and the unginned cotton outlet duct 39 is made into a horizontal pipe to discharge the unginned cotton.

[0068] Figure 2 In it, the waste cotton outlet duct 38 is vertically connected to the front side of the middle part of the main part, and in some embodiments, it can also be connected to the rear side of the middle part of the main part.

[0069] The upper air supply duct 32 and the lower air supply duct 30 are parallel to the waste cotton outlet duct 39 to supply air to the main part from the upper side and / or the lower side of the waste cotton outlet duct 39. The air supply direction is substantially opposite to the blowing direction of the short and irregular fibers, which can ensure the smooth downward movement of the unginned cotton.

[0070] In Figure 2 In the illustrated structure, the air supply duct located on the upper side of the waste cotton outlet duct 39, that is, the upper air supply duct 32, one end of the upper air supply duct 32 connected to the main part is parallel to the main part, and is vertically connected to the end of the connection between the waste cotton outlet duct 32 and the main part. This connection method is beneficial to produce a cut-off effect and avoid single unginned cotton grains with a relatively small specific surface area and a relatively large own weight from being blown out.

[0071] Correspondingly, the air supply duct located on the lower side of the waste cotton outlet duct 39, that is, the lower air supply duct 30, the lower air supply duct 30 is vertically connected to the main part.

[0072] Figure 8The cotton suction fan of the downward air suction inclined seed cleaner configured at the third station provides a negative pressure adsorption effect, which provides power for the transfer of unginned cotton 31 and enables the unginned cotton 31 to have a certain movement speed. The unginned cotton outlet pipe 39 of the image detection unit 23 is connected to the air inlet of the fan. When the motor drives the impeller to rotate, the impeller does work on the gas, thereby increasing the energy of the gas. Since the air inside the impeller is thrown out, a negative pressure is formed in the central area of the impeller. Under the action of the internal and external pressure difference, the air at the air inlet flows into the unginned cotton outlet pipe 39 of the image detection unit 23. Due to the continuous rotation of the impeller, the air continuously flows in and out, thereby realizing the continuous transportation of unginned cotton 31 and having the effects of a certain pressure and speed. The unginned cotton outlet pipe 39 of the image detection unit 23 is integrated with the unginned cotton flow rate adjustment device 22 and the lower cotton outlet 19 of the double-layer seed cleaner 2. To ensure the stable air pressure inside the lower cotton outlet 19 of the double-layer seed cleaner 2, the single unginned cotton falls along the cotton outlet pipe of the double-layer seed cleaner 2 relying on gravity without a sharp change in its falling state. Therefore, other air supply openings are needed to introduce air to supplement the negative pressure air, ensure the air pressure balance and wind speed stability in the unginned cotton transportation pipeline, and provide the best conditions for the image detection of the image detection unit 23.

[0073] According to the derivation of the above air volume and air speed calculation formulas for the air duct: Q = v·A×3600s, where the air volume Q (m³ / h), the air speed v (m / s) of the air duct, and the cross-sectional area A (㎡) of the air duct A = L×W (length in mm × width in mm), calculation of the cross-sectional area A (㎡) of the rectangular air duct Q = v·L / 1000×W / 1000×3600s The machine width of the unginned cotton flow rate adjustment device is L (the designed working width of the equipment is 3600 mm), the width of the air supply opening is W1 (the designed width of the air supply opening of the equipment is 260 mm), the width of the unginned cotton outlet is W2 (the designed width of the unginned cotton outlet of the equipment is 100 mm), and the width of the unginned cotton inlet is W3 (the designed width of the unginned cotton inlet of the equipment is 310 mm). For example, in the present invention Figure 8The cotton suction fan of the inclined seed cleaner with air suction configured at the third station uses a centrifugal fan of model 4-72-10C with a power of 37 kW, a flow rate of 34863 - 48797 m³ / h, and a total pressure of 2373 - 1877 Pa. The width of the cottonseed inlet of the cottonseed flow rate regulating device 22 is W3, which is the same as the width of the outlet pipe of the double-layer seed cleaner 2; the width of the cottonseed outlet of the cottonseed flow rate regulating device 22 is W2, which is the same as the width of the inlet of the image detection part 23. The flow cross-section of the cottonseed flow rate regulating device 22 gradually narrows from the inlet width W3 to the outlet width W2, and there is an air supply opening 36 with a width of W1. Due to the negative pressure adsorption effect in the cottonseed conveying pipeline, the cottonseed has a certain moving speed. To ensure a continuous and stable air pressure and air speed in the cottonseed conveying pipeline, air entering through other air supply openings 36 is needed to supplement the required carding air. By moving the position of the adjustment hole 47 of, for example, the air supply cover plate 44 in the air supply channel, the width of the air supply opening W1 is adjusted, and air is supplemented through the air permeable holes 51 to achieve the adjustment of the change in the cottonseed flow rate in the pipeline. After the flow rate of the cottonseed 31 is reasonably stable and reaches the designed requirement of the cotton flow detection flow rate of 8 - 12 m / s for the image detection part 23, the fixing screws of the air supply cover plate 44 are tightened. Through the change of the multi-stage adjustment position, the required cotton flow detection flow rate is met, so that the image detection part 23 reaches the best detection state.

[0074] In the foregoing example, the dimensions of the inlet 35, the air supply opening 36, and the outlet 53 are given in an embodiment. In some other embodiments, these dimensions are not strictly limited. For example, the inlet 35 should preferably follow the outlet dimensions of the double-layer seed cleaner 2 as much as possible.

[0075] In addition, the inlet 35, the air supply opening 36, and the outlet 53 are functionally related. Preferably, in the front-rear direction, the length ratio of the outlet 53 to the inlet 35 is 3:10 to 3.5:10; the length ratio of the air supply opening 36 to the inlet 53 is 8.1:10 to 8.7:10. As mentioned above, the dimensions of the inlet 35, the air supply opening 36, and the outlet 53 are the same in the width direction.

[0076] Furthermore, correspondingly, the housing of the cottonseed flow rate regulating device 22 is enclosed by a front wall, a rear wall, and left and right side walls, and an upper opening and a lower opening are determined, where the lower opening constitutes the outlet 53; the upper opening is separated in the front-rear direction, and the inlet 35 and the air supply opening 36 arranged in the front-rear direction are formed.

[0077] Among them, the rear wall is a vertical wall with a vertical plate structure. The front wall is an arc-shaped plate or an inclined plate forming a given angle with the rear wall to form the structure that gradually narrows in the front-rear direction. Specifically, as Figure 6As shown, the cooperation between the front wall and the rear wall makes the inner cavity of the unginned cotton flow rate adjusting device 22 have a structure that is larger at the top and smaller at the bottom, that is, the upper opening of the unginned cotton flow rate adjusting device 22 is a flared opening, which is conducive to arranging the inlet 35 and the air supply port 36 in the front-rear direction. And the dimensional relationships among the inlet 35, the air supply port 36, and the outlet 53 have been described in the foregoing text and will not be elaborated here.

[0078] Based on the configuration of a flared opening that then gradually narrows, on the one hand, an arc-shaped plate structure can be utilized, and on the other hand, an inclined plate combined with an arc transition part structure can be used. It is easy to understand based on the examples of the present invention and will not be elaborated here.

[0079] In addition, as a basic configuration, a mechanical three-wire machine is provided at the front stage of the double-layer unginned cotton cleaner 2 for cleaning long foreign fibers in unginned cotton. The front stage here does not specifically refer to the direct front stage.

[0080] Furthermore, before the unginned cotton enters the image detection unit 23, at least one unginned cotton drying device is adapted. In addition, in Figure 7 and Figure 8 two examples, one adopts four stations and the other adopts three stations, and the example adopting three stations is the preferred example.

[0081] First, the example shown in Figure 7 will be described. In the figure: At the first station, the dust cage of the unginned cotton separator separates the fed unginned cotton 31 from the conveying air flow. The unginned cotton 31 falls into the airtight valve of the unginned cotton separator under the action of gravity and is unloaded from the separator by relying on the rotation of the airtight valve. It falls into the mechanical three-wire machine under the action of gravity. The mechanical three-wire machine uses the combined actions of double-sided mechanical winding, spiked roller loosening and cleaning, mechanical projection, air flow adsorption cleaning, and impurity settling box diffusion to achieve the purpose of initially removing foreign fibers and other impurities. The winding cleaning mainly removes long foreign fibers, such as long woven bags, long drip irrigation tapes, long plastic film sheets, various long ropes, etc. The spiked roller loosening and cleaning can discharge some small and heavy impurities such as broken cotton stalks, broken cotton leaves, and dust. The air flow adsorption cleaning mainly removes short foreign fibers, especially sheet-like impurities, such as plastic film sheets, poultry feathers, plastic bag sheets, hair, etc.

[0082] The unginned cotton is cleaned by a mechanical foreign matter separator. After being dried once, it is sucked into the second station by the downward air suction inclined seed cleaner located at the second station. After being cleaned by the downward air suction inclined seed cleaner at the second station, a large amount of small and heavy impurities such as sterile seeds, broken cotton stalks, broken cotton leaves and dust are discharged under the combined action of the spike roller and the grid bar. The cleaned unginned cotton falls into the refined seed cleaner, and the impurities such as cotton stalks, boll shells, cotton leaves and dust in the unginned cotton are removed by using the centrifugal principle. The impurities are completely separated by the U-shaped spike rollers at the upper and lower parts, and the impurities are discharged out of the equipment through the auger. The cleaned and clean unginned cotton is transported to the next process, the double-layer seed cleaner 2. The upper and lower cleaning parts of the double-layer seed cleaner 2 use the screening principle of the spike roller and the grid bar to separate the impurities from the unginned cotton, and the recovery part uses wiping and shaking combined with inertial centrifugal force to recover the dropped small flower heads. The double-layer seed cleaner can discharge a large amount of impurities such as sterile seeds, boll shells, cotton stalks, leaf debris, dust and stiff bolls.

[0083] The unginned cotton is cleaned by the double-layer seed cleaner 2. After being dried twice, it is sucked into the third station by the image unginned cotton separator. It falls into the cotton storage box of the image mechanical cleaning part under the action of gravity. The cotton storage box is used to store cotton temporarily to ensure that there is cotton in the working width direction of the equipment. The two feeding rollers rotate in opposite directions to achieve uniform cotton feeding. The unginned cotton fed by the feeding rollers enters the main body part. First, it is loosened and cleaned by a spike roller, and then thrown onto a row of conveying rollers. During the forward rotation and conveying of the conveying rollers, the unginned cotton is cleaned of impurities. A flattening roller is installed above the conveying rollers, and the height of the flattening roller is adjustable and is used to control the thickness of the cotton layer. The cotton conveyed by the conveying rollers is further loosened and cleaned by two spike rollers, and finally forms uniform and loose single unginned cotton, which is thrown into the unginned cotton channel and enters the image detection channel of the image detection part 23. LED lamps are installed on both sides of the image detection channel, and the high-speed linear array camera scans the unginned cotton flow. The collected image data is analyzed and processed by professional computer software. The computer controls the high-pressure air jet unit according to the analysis results, sprays the identified various foreign fibers into the impurity channel and discharges them, and enters the unginned cotton recovery machine. The cleaned and clean unginned cotton is transported to the next process and is sucked into the fourth station by the downward air suction inclined seed cleaner.

[0084] At the fourth station, after the unginned cotton is cleaned by the downward air suction inclined seed cleaner and the double-layer seed cleaner located at the fourth station, it enters the ginning machine. The unginned cotton realizes the separation of fibers and cotton seeds through the pulling of the saw blades and the blocking of the rib bars. The ginned cotton seeds are continuously extruded from the working box here and discharged along the middle of the ginning rib bars and the shell blocking rib bars. The fibers hooked by the saw teeth are brushed into the lint channel by the brush installed in the rear box, which is several times higher than the linear speed of the saw blades, sent to the lint cleaner, and then sent to the lint collecting cage for packing after cleaning.

[0085] As can be seen from the above description, the four-station configuration will inevitably occupy a relatively large space and require relatively more process equipment.

[0086] Next, describeFigure 8 The exemplified three-station configuration: Comparison Figure 7 In the shown process flow diagram of cottonseed heterofiber image detection and cleaning, move Figure 7 the cotton cleaner at the second station in [reference] to a position in front of the mechanical foreign fiber remover at the first station and after the first drying in the shown process flow diagram of cottonseed heterofiber image detection and cleaning. The space at the first station is utilized more reasonably, and the cleaning effect will be significantly improved. Move Figure 8 Remove the two devices of the image cottonseed separator and the image mechanical cleaning section at the third station in the process flow diagram of cottonseed heterofiber image detection and cleaning. Move the image detection section 23 from the third station to the second station. As shown in the process flow diagram of cottonseed heterofiber image detection and cleaning in [reference], the down-draft inclined cotton cleaner 12 and the double-layer cotton cleaner 2 at the second station are used as loosening and dispersing devices, and the cottonseed 31 enters the image detection section 23 evenly and loosely through the cottonseed flow rate regulating device 22. Figure 7 Move Figure 8 the entire fourth station in the shown process flow diagram of cottonseed heterofiber image detection and cleaning forward to

[0087] Move Figure 7 the third station in the shown example. After the cottonseed is cleaned by the down-draft inclined cotton cleaner and the double-layer cotton cleaner at the third station, it enters the gin to separate the fiber from the cottonseed. The cleaned cottonseed is discharged outside the machine, and the fiber hooked by the sawtooth is sent to the lint cleaner, and then sent to the cotton collecting dust cage for packing after cleaning. Figure 8 The shown example improves the utilization efficiency of the cotton cleaner and saves the kinetic energy of the equipment. It saves three major parts of the image cottonseed separator, the cotton suction fan, and the image mechanical cleaning section compared with

[0088] Figure 8 the cottonseed heterofiber image detection and cleaning equipment shown in [reference]. The four-station cleaning process is simplified to a three-station cleaning process. Figure 7 the shown process flow diagram of cottonseed heterofiber image detection and cleaning.

Claims

1. A system suitable for detecting and cleaning foreign fibers, characterized in that, Comprising: An image detection unit for detecting and removing short foreign fibers in the unginned cotton stream; An unginned cotton flow rate regulating device, located at the front stage of the image detection unit, having a housing with an inlet and an outlet for connecting to the image detection unit. The housing gradually narrows in the front-rear direction from the inlet to the outlet, and an air supply opening is provided on the front or rear side of the inlet; A double-layer unginned cotton cleaner, connected to the said inlet; And A mechanical three-wire machine, located at the front stage of the double-layer unginned cotton cleaner, for cleaning long foreign fibers in the unginned cotton; Before the unginned cotton enters the image detection unit, at least one unginned cotton drying device is adapted.

2. The system according to claim 1, characterized in that, The housing of the unginned cotton flow rate regulating device is enclosed by a front wall, a rear wall, and left and right side walls, defining an upper opening and a lower opening, where the lower opening constitutes the said outlet; The upper opening is separated in the front-rear direction to form the said inlet and the air supply opening; Among them, the air supply opening has an opening degree adjusting mechanism or structure.

3. The system according to claim 2, wherein The rear wall is a vertical plate, and the front wall is an arc-shaped plate or an inclined plate forming a given angle with the rear wall to form the structure that gradually narrows in the front-rear direction; Correspondingly, the air supply opening is located on the front side of the inlet; If it is an inclined plate, the lower end of the inclined plate has an arc transition part.

4. The system according to claim 2 or 3, characterized in that, In the front-rear direction, the length ratio of the outlet to the inlet is 3:10 to 3.5:10; The length ratio of the air supply opening to the inlet is 8.1:10 to 8.7:

10.

5. The system according to claim 2 or 3, characterized in that, The air supply opening has a shielding perforated plate; The air supply opening is provided with a valve plate in the front-rear direction, and a structure or mechanism for adjusting the valve plate in the front-rear direction.

6. The system according to claim 1, wherein The said image detection unit includes: A main body part with a rectangular cross-section for receiving the said outlet; An unginned cotton outlet pipe, connected to the outlet of the main body part; A waste cotton outlet pipe, vertically connected to the front or rear side of the middle part of the main body part; An air supply pipe, parallel to the waste cotton outlet pipe, to supply air to the main body part from the upper side and / or lower side of the waste cotton outlet pipe.

7. The system according to claim 6, wherein One end of the air supply pipe located above the waste cotton outlet pipe connected to the main body part is parallel to the main body part and is vertically connected to the end where the waste cotton outlet pipe is connected to the main body part; The air supply pipe located below the waste cotton outlet pipe is vertically connected to the main body part; The flow cross-sectional area of the air supply pipe located above the waste cotton outlet pipe is smaller than that of the air supply pipe located below the waste cotton outlet pipe.

8. The system according to claim 1, wherein The said image detection unit, unginned cotton flow rate regulating device, double-layer unginned cotton cleaner, and the lower suction inclined unginned cotton cleaner located at the front stage of the double-layer unginned cotton cleaner are arranged from bottom to top at the same work station in the workshop.

9. The system according to claim 8, wherein At the front stage of the lower suction inclined unginned cotton cleaner, a cleaning and separating unginned cotton machine, a mechanical three-wire machine, and an unginned cotton separator arranged from bottom to top are provided at the first work station in the workshop, and there is one unginned cotton drying device between the cleaning and separating unginned cotton machine and the mechanical three-wire machine; There is a second unginned cotton drying device between the first work station and the lower suction inclined unginned cotton cleaner.

10. A cotton processing production line, characterized in that, Including the system for detecting and cleaning foreign fibers as described in any one of claims 1 to 9.

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