CN113668105A - Spun yarn broken end detection method and yarn suction component with broken end detection function - Google Patents
Spun yarn broken end detection method and yarn suction component with broken end detection function Download PDFInfo
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- CN113668105A CN113668105A CN202111009534.7A CN202111009534A CN113668105A CN 113668105 A CN113668105 A CN 113668105A CN 202111009534 A CN202111009534 A CN 202111009534A CN 113668105 A CN113668105 A CN 113668105A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
- D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
- D01H13/1691—Thread breakage detector means associated with pneumatic cleaning devices, e.g. suction of broken end of yarn
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/66—Disintegrating fibre-containing textile articles to obtain fibres for re-use
Abstract
The invention relates to a detection technology of ring spinning yarn breakage, in particular to a detection method of yarn breakage and a yarn suction component with a yarn breakage detection function, the method for detecting broken ends of spun yarns comprises the steps of installing a detection element at the position of a flute pipe body or a connecting pipe of a spinning machine, wherein the section of the inner side of the flute pipe body or the connecting pipe is in a long strip shape, judging whether the spun yarn spindle position corresponding to the flute tube body is broken or not by detecting whether fibers pass through the cross section at the installation position of the detection element, wherein the detection element is a photoelectric or capacitive detection element, the flow area of the cross section at the installation position of the detection element is larger than the total flow area of the suction holes on the flute tube body, the distance between the inner side of the cross section at the installation position of the detection element and two end faces close to the cross section is smaller than 10mm, the yarn suction component with the broken end detection function detects the broken end of the spun yarn by the spun yarn broken end detection method, the detection device comprises a flute pipe body, a connecting pipe and a detection element, and can detect whether the ring spinning frame has a spinning broken end or not in a subsection mode by taking the flute pipe as a unit.
Description
Technical Field
The invention relates to a detection technology of ring spinning yarn breakage, in particular to a detection method of yarn breakage and a yarn suction component with a yarn breakage detection function, the method for detecting broken ends of spun yarns comprises the steps of installing a detection element at the position of a flute pipe body or a connecting pipe of a spinning machine, wherein the section of the inner side of the flute pipe body or the connecting pipe is in a long strip shape, judging whether the spun yarn spindle position corresponding to the flute tube body is broken or not by detecting whether fibers pass through the cross section at the installation position of the detection element, wherein the detection element is a photoelectric or capacitive detection element, the flow area of the cross section at the installation position of the detection element is larger than the total flow area of the suction holes on the flute tube body, the distance between the inner side of the cross section at the installation position of the detection element and two end faces close to the cross section is smaller than 10mm, the yarn suction component with the broken end detection function detects the broken end of the spun yarn by the spun yarn broken end detection method, the detection device comprises a flute pipe body, a connecting pipe and a detection element, and can detect whether the ring spinning frame has a spinning broken end or not in a subsection mode by taking the flute pipe as a unit.
Background
The main task of the ring spun yarn stopping worker in the round trip is to check and process broken ends, wherein the broken ends are checked to occupy a large amount of working time of the ring spun yarn stopping worker, and the joint time only occupies a small part of the round trip checking time of the ring spun yarn stopping worker. In order to reduce the labor intensity of the spun yarn stop worker and reduce the labor amount, the broken ends of the spun yarns need to be automatically detected, and the detection result needs to be notified to the stop worker.
The technology for detecting the broken ends of the ring spinning in the market is mainly single-spindle detection, namely a sensor is arranged on each spindle to detect whether each spindle is broken, and the scheme of detecting the steel wire ring by adopting a photoelectric or inductive detection technology is dominant in the market. Since the broken ends still need to be processed by the yarn blocking worker after being detected, from the viewpoint of improving the circulating efficiency of the yarn blocking worker, it is not necessary to detect which spindle is broken, and the requirement of the yarn blocking worker for circulating and searching for the broken ends can be met as long as which section of spindle is broken. For example, every 6 spindles of the ring spinning frame are used as a group, the stop worker is informed of the occurrence of the end breakage of the group of spindles after the end breakage of the group of spindles is detected, and the stop worker basically does not need to spend much time and effort to find out which spindle in the group of spindles has the end breakage when the end breakage is processed, so that the same valuable information can be provided for the stop worker to search the end breakage position in a circulating manner, and the implementation cost is lower than that of single spindle detection.
The existing ring spinning frame generally adopts an air suction system to suck broken slivers into a pattern return box, a fan is arranged at the head end or the tail end of the spinning frame, negative pressure generated by the fan is transmitted to the position of each spindle position of the spinning frame through a main air pipe arranged along the length direction of the spinning frame, a plurality of air pipe joints are separated from the main air pipe and are used for connecting a plurality of flute pipes, each flute pipe is generally provided with 6 suction holes, each suction hole corresponds to one spindle, the suction holes are close to the sliver outlet part of a front roller, when the spinning is broken, slivers fibers discharged from the front roller are sucked by the suction holes on the flute pipe, the fibers are sucked into the pattern return box at the end part of the spinning frame through the main air pipe, a part of novel air pipes do not use the traditional 6-spindle one-section flute pipe, an independent cotton suction pipe is directly led out for each spindle position on the main air pipe, the cotton suction pipe is opened below a front roller, and the slivers fibers discharged from the front roller after the spinning is broken ends are sucked into the main air pipe, therefore, whether the spinning is broken can be judged by detecting whether the continuously sucked fiber strand exists in the cotton suction pipeline or not in a segmented mode.
The utility model discloses a "yarn broken end detection device" (application number 200520080973.7) discloses a yarn broken end detection device, install photoelectric sensor at roller seat both ends, the ray that photoelectric sensor sent passes through the lower edge of preceding leather roller, after the yarn broken end, fly and the winding leather roller phenomenon that appear after photoelectric sensor detects the broken end, the device determine part exposes outside, easily receive the influence of fly and ambient light in the environment, and the remote reliability that can detect the fly that the broken end produced is lower, lead to this technical scheme to implement more difficultly.
Disclosure of Invention
To overcome the defects in the prior art, the invention provides a method for detecting broken ends of spun yarns and a yarn sucking component with a broken end detecting function, which are used for detecting whether the spun yarns are broken or not on a ring spinning frame in a segmented manner, and the solution is as follows:
a detection method for broken ends of spun yarns is characterized in that a flute tube body and a connecting tube are arranged on a ring spinning frame and used for sucking fiber strands output by a front roller after the broken ends of spun yarns into a main air duct, the flute tube body is a section of flute-shaped tube with two sealed ends, a row of air inlet suction holes and an air outlet are distributed on the flute tube body, each suction hole corresponds to a spindle position, the suction hole is adjacent to the front roller, the fiber strands output by the front roller are sucked by the suction holes after the broken ends of the spun yarns, and the connecting tube is a tube connecting the air outlet of the flute tube body with the main air duct and used for sending the fibers sucked by the suction holes into the main air duct
Installing a detection element at a position of a flute pipe body or a connecting pipe of a spinning machine, wherein the section of the inner side of the flute pipe body or the connecting pipe is long, fibers sucked in through a suction hole on the flute pipe body pass through a long-strip-shaped cross section at the installation position of the detection element, judging whether a spun yarn spindle position corresponding to the flute pipe body is broken or not by detecting whether the fibers pass through the cross section at the installation position of the detection element or not, if the fibers pass through the cross section at the installation position of the detection element, the spun yarn spindle position corresponding to the flute pipe body is broken, and otherwise, the spun yarn spindle position corresponding to the flute pipe body is not broken; the detection element is a photoelectric or capacitive detection element; the photoelectric detection elements are arranged at two ends of the long strip-shaped flow cross section at the inner side, and the capacitive detection elements are arranged at two inner side surfaces of the long strip-shaped flow cross section at the close distance; the flow area of the cross section at the detection element mounting position is larger than the total flow area of the suction holes in the flute tube body, the distance between the inner side of the cross section at the detection element mounting position and the two end faces close to each other is smaller than 10mm, the distance between the inner side of the cross section at the detection element mounting position and the two end faces close to each other is preferably 2-6 mm, further preferably 3-4 mm, and the detection area of the detection element covers the whole cross section through which the fibers at the detection element mounting position pass.
Whether fibers are sucked by the suction holes is judged through the change of the amplitude of the output signal of the detection element, if the fibers are sucked by the suction holes, the capacitance value formed by a capacitance plate is increased, the larger the suction amount of the fibers is, the larger the capacitance value is, the output of the photoelectric device is changed because the light of the light-emitting device is blocked by the suction fiber part, the amplitude of the output signal of the detection element is obviously changed when the fibers are sucked by the suction holes, and the output signal of the detection element has larger fluctuation when the fibers with the fiber strips are sucked than when the fibers without the fiber strips are sucked.
A yarn suction component with broken end detection function is arranged on a ring spinning frame and used for sucking fiber strands output by a front roller after the broken end of spun yarn into a main air pipe and judging the broken end of the spun yarn in a segmented manner by detecting whether the fiber strands are sucked or not, the yarn suction component comprises a flute pipe body and a connecting pipe, the flute pipe body is a section of flute-shaped pipe, two ends of the flute pipe body are sealed by end sockets, a row of air inlet suction holes and an air outlet are distributed on the flute pipe body, each suction hole corresponds to a spindle position and is close to the front roller, generally, each flute pipe body comprises 6 suction holes, the fiber strands output by the front roller are sucked by the suction holes after the broken end of the spun yarn, the connecting pipe is a pipe connecting the air outlet of the flute pipe body and the main air pipe and used for sending the fibers sucked by the suction holes into the main air pipe, and is characterized by comprising the flute pipe body, the connecting pipe and a detection element,
the detection element is arranged on the flute tube body or the connecting tube, the flow cross section of the position of the flute tube body or the connecting tube where the detection element is arranged is in a strip shape, the fiber sucked by any suction hole on the flute tube body passes through the strip flow cross section of the position of the detection element, namely the detection element is used for detecting the broken ends of the spun yarns in sections,
the detection element is a photoelectric detection element or a capacitive detection element, the photoelectric detection element comprises a light-emitting device and a photoelectric device, the photoelectric detection element is arranged at two ends of the long-strip-shaped circulation cross section, which are far away from each other, and the capacitive detection element is arranged at two inner side surfaces of the long-strip-shaped circulation cross section, which are close to each other;
the flow area of the cross section at the position where the detection element is installed is larger than the total flow area of all the suction holes on the flute body,
when the detecting element is mounted on the flute body, the detecting area of the detecting element is adjacent to the suction hole.
The smallest internal dimension of the cross-section inside at the narrowest point of the cross-section of the elongate cross-sectional tube section is less than 10mm,
the minimum size of the inner side of the cross section at the position where the detection element is installed is not larger than the size of the detection area of the detection element in the direction, so that the situation that all fibers of the strands sucked by the suction holes pass through the detection area of the detection element can be ensured, and otherwise, part of sucked fibers cannot be detected by the detection element when passing through the long and narrow cross section pipe section.
The flow cross-section at the location of the mounting of the detection element is preferably rectangular in cross-section and the connection tube is preferably a variable cross-section tube.
If a fiber is sucked by the suction hole, the capacitance value formed by a capacitance plate of the capacitive detection element is increased, the larger the suction amount of the fiber is, the larger the capacitance value is, the output of the photoelectric device is changed because the light of the light-emitting device is blocked by the part of the sucked fiber, when the fiber is sucked by the suction hole, not only the amplitude of the output signal of the detection element is obviously changed when the fiber is not sucked, but also the output signal of the detection element has larger fluctuation when the fiber with the fiber strips is sucked than when the fiber without the fiber strips is sucked.
The yarn sucking component with the broken end detection function is provided with a detection circuit, the detection element is electrically connected to the detection circuit, the detection circuit has one or more functions and components of signal transmission, comparison and judgment, signal input and signal output, the detection circuit has the broken end indication alarm function, and a broken end indicator lamp is arranged on a spinning frame section corresponding to the flute tube body.
The photoelectric detection element is connected to the photoelectric detection circuit, and the photoelectric detection circuit can be integrated with various photoelectric detection circuits in different forms such as operational amplifier, triode amplifier, voltage comparison circuit and the like. The capacitance plate of the capacitance type detection element is connected to the capacitance type detection circuit, the capacitance type detection circuit can adopt different forms, such as a capacitance bridge, a resonance type, a charge-discharge timing type and the like, but no matter what form of capacitance type detection circuit is adopted, the output value of the capacitance type detection circuit can change to indicate whether fibers sucked by the suction holes exist in the detection area and the quantity of the fibers sucked by the suction holes.
By the structure, the working principle of the yarn sucking component with the broken end detection function is as follows: when the broken ends of the yarns are spun, the broken ends of the fiber strands are sucked by the suction holes, the fiber strands pass through the detection area of the detection element and are detected by the detection element, the detection element is electrically connected to the detection circuit, the output signal of the detection circuit changes, for example, compared with the case that no fiber strands are sucked, the output change of the photoelectric device has more obvious fluctuation (larger amplitude), the capacitance value of the capacitive detection element is increased and has more obvious fluctuation, if the detection element detects that the fibers are continuously sucked by the suction holes, the spindle positions corresponding to the flute tube bodies have broken ends, otherwise, the spindle positions do not have broken ends, and if the broken ends occur, the detection circuit outputs analog quantity signals, switching quantity signals or alarm signals.
Drawings
Fig. 1 is a schematic front view of a structure of a spun yarn breakage detecting method and a yarn suction member having a breakage detecting function according to an embodiment 1 of the present invention.
Fig. 2 is a schematic structural side view of a spun yarn breakage detecting method and a yarn suction member with a breakage detecting function according to an embodiment 1 of the present invention.
Fig. 3 is a schematic structural side view of a spun yarn breakage detecting method and a yarn suction member with a breakage detecting function according to an embodiment 2 of the present invention.
Fig. 4 is a schematic front view of a structure of a spun yarn breakage detecting method and a yarn suction member having a breakage detecting function according to embodiment 3 of the present invention.
Fig. 5 is a schematic plan view showing a structure of a yarn breakage detecting method and a yarn sucking member having a breakage detecting function according to embodiment 3 of the present invention.
Fig. 6 is a schematic structural side view of a spun yarn breakage detecting method and a yarn suction member with a breakage detecting function according to embodiment 3 of the present invention.
Fig. 7 is a schematic front view of a structure of a spun yarn breakage detecting method and a yarn suction member having a breakage detecting function according to embodiment 4 of the present invention.
FIG. 8 is a schematic view of a cross-sectional tube member of embodiment 4 of a method for detecting broken ends of spun yarns and a yarn sucking member having a broken end detecting function according to the present invention.
Fig. 9 is a schematic front view of a structure of a spun yarn breakage detecting method and a yarn suction member having a breakage detecting function according to embodiment 5 of the present invention.
Fig. 10 is a schematic front view of a structure of a spun yarn breakage detecting method and a yarn suction member having a breakage detecting function according to an embodiment 6 of the present invention.
In the figure: 1. flute tube body 10, suction hole 11, round connecting tube 110, transition section 111, long and narrow section tube 12, mounting hole 2, light emitting diode 3, phototriode 4, independent cotton suction tube 40, additional flute tube body 6, total air duct 60 and air duct joint
Detailed Description
The following provides specific embodiments of a method for detecting broken ends of spun yarns and a yarn sucking member with a broken end detecting function according to the present invention, which are only examples of the present invention and do not limit the claims of the present invention.
The invention provides a spun yarn broken end detection method and an embodiment 1 of a yarn suction member with a broken end detection function (as shown in fig. 1 to 2):
the ring spinning frame is provided with a yarn suction component, the yarn suction component comprises a flute pipe body 1 and a circular connecting pipe 11 and is used for sucking fiber strands output by a front roller after spinning breakage into a main air pipe 6, the flute pipe body 1 is a section of flute-shaped pipe, two ends of the flute pipe body are sealed by end sockets, the flute pipe body 1 is arranged below a front roller through a mounting hole 12 on the end socket and a spring on a roller seat (other mounting modes are also provided), a plurality of flat air inlet suction holes 10 and a circular air outlet are distributed on the flute pipe body 1, each flute pipe body 1 generally comprises 6 suction holes respectively corresponding to 6 spindle positions, the suction holes 10 are close to the front roller fiber strand output part, the fiber strands output by the front roller are sucked into the suction holes 10 after spinning breakage, the circular connecting pipe 11 is a section of circular cross-section pipe with the axis vertical to the length direction of the flute pipe body 1, as shown in figure 2, the circular connecting pipe 11 is connected with the air outlet of the flute pipe body 1 and the main air pipe 6, for feeding the fibers sucked by the suction holes 10 into the main air duct,
a photoelectric detection element is arranged on a flute tube body 1 to detect whether a suction hole 10 sucks in fiber strands, two holes are drilled on end sockets at two ends of the flute tube body, a light emitting diode 2 is used as a light emitting device and is arranged in a hole drilled on the end socket at one end of the flute tube body, a phototriode 3 is used as a photoelectric device and is arranged in a hole drilled on the end socket at the other end of the flute tube body 1, light emitted by the light emitting diode 2 is received by the phototriode 3, a detection area is arranged between a light emitting area of the light emitting diode 2 and a photosensitive area of the phototriode 3 and is adjacent to the suction hole 10, namely the light emitting diode 2 and the phototriode 3 are arranged close to the top end of the end socket of the flute tube body 1 close to the suction hole 10, so that the fiber sucked by the suction hole 10 leaves the suction hole 10 and enters the detection area, fiber strands are not completely dispersed by air flow at the moment, the fiber strands are concentrated and are convenient to be detected by the phototriode 3, after the fiber is sucked into the suction hole by the airflow, the fiber enters the detection area and then starts to scatter and change the flow direction, and the fiber floats towards the air outlet of the flute pipe body, so that after the fiber strands are sucked into the yarn suction component, only the fiber strands are concentrated near the suction hole 10, therefore, the photoelectric detection element arranged below the suction hole is easier to detect the fiber, after the fiber strands are fully blown away by the airflow, the fiber is difficult to detect in a larger cross section range, and the fiber circulation cross section needs to be changed so as to improve the distribution density of the fiber in the detection area, so that the sucked fiber is convenient to detect. The cross section (horizontal section in fig. 1 and 2) at the position where the detection element is installed is in the shape of a long rectangle, the length of the rectangle is equal to the length of the inner side of the flute tube body at the position, the narrower the width of the rectangle is, the better the detection element is installed, the closer the detection element is to the suction hole, if fibers are continuously sucked by the suction hole, the output of the phototriode 3 is reduced because the light emitted by the light emitting diode 2 is blocked by the fiber part, therefore, when the output signal of the phototriode 3 is reduced, the fact that the fibers are sucked by the suction hole 10 is indicated, the fact that the spindle position corresponding to the flute tube body 1 is broken is indicated, otherwise, the fact that no fibers are continuously sucked by the suction hole is indicated, and the spindle position corresponding to the flute tube body is not broken.
After the suction hole 10 sucks the fiber, the amplitude of the output signal of the phototriode 3 is obviously reduced compared with the amplitude when the fiber is not sucked, the fluctuation of the output signal of the phototriode 3 is also obvious compared with the amplitude when the fiber is not sucked, and the output signal of the phototriode 3 is relatively more stable when the fiber is not sucked.
The working principle of the spun yarn broken end detection method and the yarn suction component with the broken end detection function is as follows: when spinning is broken, after the yarn corresponding to any spindle position in the flute tube body is broken, the fiber strand is sucked by the suction hole 10 of the flute tube body, the fiber strand is detected by the detection element when passing through the detection area of the photoelectric detection element, the detection element is electrically connected to the detection circuit, the output signal of the detection circuit can be changed, compared with the condition that no fiber is sucked, the output amplitude of the photoelectric device is reduced and has more obvious fluctuation (larger amplitude), if the detection element detects that the fiber is continuously sucked by the suction hole, the spindle position corresponding to the suction hole is broken, otherwise, the spindle position corresponding to the suction hole is not broken.
In actual production, a very small amount of strand fibers after spinning breakage are wound on a roller or a leather roller and cannot be sucked by a suction hole, and breakage cannot be detected through the technology of the invention under the condition, however, the phenomena of the roller and the leather roller are less and less along with the improvement of the temperature and humidity control level of a workshop, the temperature and humidity of the workshop are not proper due to the phenomena of the roller and the leather roller, a large amount of breakage often occurs under the condition, and a driver can find and process the breakage of the roller or the leather roller in the process of processing the detected breakage. Actually, if the workshop humiture regulation does not lead to twining the roller well or around the leather roller, inevitably lead to high broken end rate, and the car stopping worker can be tired in handling the broken end under the high broken end rate condition, no matter what broken end detection mode that adopts does not have much meaning, broken end detects and only is applicable to improvement car stopping worker when the broken end rate is lower and seeks the efficiency of broken end, if all be broken end everywhere, just can't improve the efficiency of seeking the broken end.
Example 2 (shown in fig. 3) of a spun yarn breakage detection method and a yarn suction member having a breakage detection function according to the present invention:
the cross-sectional shape of the flute tube body 1 shown in fig. 2 is a general flute tube cross-sectional shape, the fibers are blown out by the air flow rapidly after being sucked by the suction hole 10 at the uppermost part of the flute tube body 1 in fig. 2, which is not beneficial to making the sucked fibers block the light beam emitted by the light emitting device as much as possible, in order to further make the sucked fibers block the detection area of the photoelectric detection element as much as possible, as shown in fig. 3, the cross section of the flute tube body 1 at the detection area is narrowed to reduce the width of the fiber flow projected in the length direction of the flute tube at the installation position of the photoelectric device, the width is not more than the width of the detection area of the photoelectric detection element, the width of the detection area of the photoelectric detection element depends on the model of the selected photoelectric detection element, but if the width is too large, the filling rate of the fibers distributed in the space is reduced, the effect of the fibers blocking light is reduced, and the requirement on the performance of the photoelectric detection element is increased, therefore, the width is preferably not more than 10mm, but not too small, the too small width may cause fiber blockage, the width is preferably not less than 2mm to smoothly pass through the cotton knot, preferably 3-5 mm, for example, the outer diameter of the light emitting diode of the embodiment is 3mm, the inner size of the flute tube body 1 at the height of the light emitting diode 2 in the horizontal direction in fig. 3 is 3mm, just to install and develop the light emitting diode, the light beam emitted by the light emitting diode 2 is emitted to the opposite photoelectric device through the narrow and long gap with 3mm width, as long as the photosensitive area of the photoelectric device can cover the 3mm area, the sucked fiber strand can be ensured to be detected by the photoelectric detection element, the fiber sucked by the suction hole can pass through the area with 3mm width, and has higher fiber distribution density than that of the wider area, and can better block the light emitted by the light emitting diode, has higher detection sensitivity.
Although the present embodiment adopts the photoelectric detection element, it is not excluded to adopt the capacitive detection element, that is, the position where the photoelectric detection element is installed in the present embodiment is located at the inner side of the two end faces with the closer cross-sectional distance, and the capacitor plates of the parallel plate capacitor are installed at each suction hole, and the capacitors formed by all the capacitor plates on the flute body are connected in parallel, when the flute sucks the fiber, the capacitance value formed by the capacitor plates will increase, in order to improve the detection sensitivity, the size of the short side of the cross-section is reduced as much as possible, for example, 2mm of plate gap is adopted, and meanwhile, the width of the capacitor plates at the position of the suction holes is 9 mm.
Example 3 of a spun yarn breakage detection method and a yarn suction member having a breakage detection function according to the present invention (as shown in fig. 4 to 6):
in embodiments 1 and 2, the detection element is mounted on the flute tube body, and the flute tube body needs to be frequently taken down, which makes the operation inconvenient in practical application, on the other hand, the length of the flute tube body 1 is generally longer, generally more than 350mm, and when the photoelectric detection element is adopted, the photoelectric detection element has a certain requirement for selection of the photoelectric element due to longer detection distance, and a photoelectric device with longer action distance and better sensitivity needs to be selected, for example, the photo-pair voltage type optical sensor TLS253R is selected as the photoelectric device, and the parallel light LED358 is selected as the light emitting device, but this results in higher implementation cost.
In order to reduce the cost and improve the detection effect, the photoelectric detection element is installed on the connection pipe in this embodiment, generally, the connection pipe connecting the flute tube body 1 and the main air duct 6 is a circular cross-section pipe, and the detection area of the photoelectric detection element is relatively small and cannot cover the whole circular cross-section of the connection pipe, so a section of connection pipe with a variable cross-section is added between the circular connection pipe 11 and the flute tube body 1, the section of connection pipe with a variable cross-section is composed of a long and narrow cross-section pipe 111 and a transition section 110, the long and narrow cross-section pipe 111 is a pipe with a rectangular cross-section, the transition section 110 is a section of variable cross-section in a "sky-circle place", a cross-section corresponding to a "place" is the same as the cross-section of the long and narrow cross-section pipe 111, a cross-section corresponding to a "sky-circle" is the same as the cross-section of the circular connection pipe 11, and the circular connection pipe 11 is connected to the main air duct 6.
The cross-sectional area of the inner side of the variable cross-section pipe section is larger than the total air intake area of all the suction holes 10 on the flute body, the inner cross-sectional area of the long and narrow cross-section pipe 111 section is the smallest in the variable cross-section pipe section, the inner side size of the cross-sectional area of the long and narrow cross-section pipe 111 of this embodiment is 80mm long and 4mm high, namely the air outlet of the flute body is a rectangular opening with the length of 80mm and the width of 4mm, the photoelectric detection elements are installed at the two ends of the long and narrow cross-section pipe 111, namely the distance between the light emitting device and the photoelectric device is 80mm, the detection area of the photoelectric detection elements is 80mm long and 4mm wide, the flow section is also 80mm long and 4mm wide, when the sucked fiber moves to the position of the long and narrow cross-section pipe 111 through the suction holes 10 and the flute body 1, the fiber is limited by the cross-section space of the long and narrow cross-section pipe 111, the fiber passes through the detection area of the photoelectric detection elements, and has higher spatial distribution density in the photoelectric detection area, the detection sensitivity is favorably improved. Because the distance (80mm) of the long and narrow cross-section tube 111 in the length direction of the flute body is shorter than the length (350mm) of the flute body, a light emitting diode (such as EL-1KL3) and a photodiode (such as SFH206) with low price can be selected as a photoelectric detection element, the outer diameter of the EL-1KL3 is 4.65mm, and the photosensitive area of the SFH206 can completely cover the range of 4mm of the long and narrow cross-section tube 111, so that the fibers sucked by the suction hole can be ensured to pass through the detection area of the photoelectric detection element, and if the minimum size of the cross section of the long and narrow cross-section tube 111 is larger than the size of the photosensitive area of the SFH206, when the sucked fibers pass through the long and narrow cross-section tube 111, part of the fibers can not pass through the detection area, the fiber density of the detection area is reduced, and the detection is not beneficial to detection.
The minimum inner dimension of the cross section of the long and narrow cross-section tube 111 preferably does not exceed the detection area of the photoelectric detection element to a large extent, for example, not more than 10mm, otherwise, the sucked fiber strands may not pass through the detection area of the photoelectric device too much, which results in the spatial distribution density of the fiber flowing through the detection area being too small to be beneficial for detection, especially when the yarn count of the spun yarn is high and the spun yarn corresponding to the flute tube body has only one broken end, the amount of the fiber strands sucked through the suction hole is small, and it is more necessary to make the fiber strands pass through the photoelectric detection area as completely as possible and keep the relatively high distribution density as much as possible. Even if a photoelectric device with a large detection range (large photosensitive area) is selected, the minimum inner dimension of the cross section of the long and narrow section tube 111 is preferably not too large and is preferably within 5mm, so that the sucked fibers can be detected even if the yarn is spun high count yarn. Therefore, in the range of less than 10mm, the preferable interval of the minimum inner dimension of the cross section of the long and narrow section tube 111 is within 2-6 mm, and the further preferable interval is between 3-4 mm, which is beneficial to improving the detection precision and ensuring smooth fiber. The photoelectric detection elements may be installed in the form of holes at both end surfaces of the long and narrow cross-sectional tube 111, or the long and narrow cross-sectional tube 111 may be made of a transparent material (glass, acrylic lamp), and the photoelectric detection elements may be installed at the outer side thereof, and if the selected photoelectric detection elements are susceptible to visible light, a light-tight protective cover may be further provided at the outer side of the transparent long and narrow cross-sectional tube 111.
Although the present embodiment mounts the photoelectric detection elements on both side surfaces of the long and narrow cross-sectional tube 111 at a relatively large distance, it is not excluded to use a capacitive detection element instead of the photoelectric detection element. The method specifically comprises the following steps: the capacitance plates of the capacitance sensor are installed on the two side surfaces of the long and narrow cross-section tube 111 which are closer, that is, the capacitance plates of the capacitance detection element are installed on the inner side surface of the long and narrow cross-section tube 111 with larger cross section, for example, the top surface and the bottom surface of the inner side of the long and narrow cross-section tube 111 shown in fig. 6 are installed with the plates of a parallel plate capacitor, that is, the plate spacing of the parallel plate capacitor is 3mm, the plate length is 80mm, the plate width is 5mm, the region between the two plates is a detection region, the capacitance sensor plate is connected to the capacitance detection circuit, when a fiber strand is sucked by the suction hole, the capacitance value formed by the capacitance plate is increased, the larger the suction amount of the fiber is, the larger the capacitance value is increased, the output value change of the capacitance detection circuit can indicate whether the fiber strand is sucked by the suction hole and the amount of the fiber is sucked by the suction hole, similarly, when the fiber strand is continuously sucked, the capacitance value of the capacitive sensing element will also fluctuate more than if no fibres were inhaled. The capacitance sensor is a capacitance sensor of variable dielectric constant type, the sensitivity depends on the change rate of the dielectric constant of the detection area (the space surrounded by the two electrode plates), if the distance between the two electrode plates is small, the same fiber quantity can increase the change rate of the dielectric constant, therefore, the electrode plate distance is as small as possible from the sensitivity perspective, but the excessively small electrode plate distance can influence the normal circulation of the fiber and cause blockage, therefore, the distance between the two electrode plates of the parallel electrode plate capacitor is preferably between 2 and 5mm, the distance larger than 5mm is certainly not excluded, but the requirement of the distance increase on the detection circuit can be improved.
Example 4 of a spun yarn breakage detection method and a yarn suction member having a breakage detection function according to the present invention (as shown in fig. 7 to 8):
in order to facilitate the application of the technology to the existing equipment, the flute pipe in this embodiment is an existing flute pipe of a spinning frame, a round connecting pipe 11 is provided on a flute pipe body 1, a round connecting pipe 11 for connection is also provided at each flute pipe connection position on a main air duct 6, a two-section transition section 110 and a long and narrow section pipe 111 are added between the two-section round connecting pipe 11 in fig. 7, the long and narrow section pipe 111 is the same as that in embodiment 3, a light emitting diode 2 and a phototriode 3 are installed on both sides of the long and narrow section pipe 111 as photoelectric detection elements, the two-section transition section 110 and the long and narrow section pipe 111 are made into a variable section pipe as shown in fig. 8, and the photoelectric detection elements and the detection circuit are installed on the variable section pipe to make a detection part, the detection part replaces the existing flute pipe connecting pipe on the spinning frame to detect whether the spun yarn spindle position of the corresponding to the flute pipe has broken ends, the equipment is convenient to be reformed on the production site. Except the transition section with the variable cross section in the shape of a skyline and a square, other tubes with the variable cross section are not excluded from being used for replacing, the basic idea is that a narrow fiber channel is formed, fiber strands sucked by suction holes are detected in the narrow fiber channel, the minimum size of the cross section of the narrow fiber channel does not exceed the range of a detection area of a photoelectric detection element, the flow area of the narrow fiber channel is larger than the flow area of all the suction holes in the flute body, and the cross section of the narrow fiber channel is the minimum in all the sections of the tube section with the variable cross section, so that the fibers and air flow at the cross section can be guaranteed to have higher flow speed, the fibers are not accumulated, the fibers also have higher distribution density, and the detection precision is improved.
Example 5 (shown in fig. 9) of a spun yarn breakage detecting method and a yarn suction member having a breakage detecting function according to the present invention:
in this embodiment, a long narrow cross-section tube 111 is used to connect the flute body 1 and the total wind pipe 6, and the light emitting diode 2 and the photo transistor 3 are installed on both sides of the long narrow cross-section tube 111, without excluding other types of light emitting devices (such as light emitting devices of different wave bands) and photoelectric devices (such as phototubes, photomultipliers, photosensitive cells, photosensitive diodes, photoresistors, and photocells). Meanwhile, it is not excluded that two capacitor plates of a parallel plate capacitor are mounted on a side wall with a relatively large area in the long and narrow cross-section tube 111, or a capacitive sensor with a planar shape such as an interdigital electrode is mounted on a side wall with a relatively large area in the long and narrow cross-section tube 111, for example, in fig. 9, an interdigital electrode parallel to a paper sheet is mounted on an inner side wall of the long and narrow cross-section tube 111, and then the inside of the long and narrow cross-section tube 111 is a detection region, and it is of course necessary to determine parameters of the interdigital electrode according to the size of the cross section of the long and narrow cross-section tube 111.
Example 6 (shown in fig. 10) of a spun yarn breakage detecting method and a yarn suction member having a breakage detecting function according to the present invention:
for a part of novel spinning frames, particularly compact spinning ring spinning frames, a traditional 6-spindle one-section flute pipe is not used, but an independent cotton suction pipe is led out for each spindle position directly on a main air pipe 6 through an air pipe joint 60, the opening of the cotton suction pipe is arranged below a front roller, and fiber strands after the fiber ends are broken are sucked into the main air pipe 6 through the independent cotton suction pipe. For the spinning frame, when the yarn sucking component is applied, a section of additional flute tube body 40 is added to connect a row of independent cotton sucking tubes 4, the additional flute tube body 40 plays a role similar to the flute tube body 1 communicating with the suction hole 10, the additional flute tube body 40 is connected to the air duct joint 60 through a section of transition section 110, a section of long and narrow section tube 111 and a section of transition section 110 in sequence, the light emitting diode 2, namely the phototriode 3, is installed on the long and narrow section tube 111, and after the spindle position spinning is broken, the strand fibers are sucked into the additional flute tube body 40 through the independent cotton sucking tubes 4 and then enter the main air duct 6 through the long and narrow section tube 111.
The invention is not limited to the embodiments discussed above, and a person skilled in the art can deduce other variants from the invention, which also belong to the subject matter of the invention.
Claims (10)
1. A detection method for broken ends of spun yarns is characterized in that a flute tube body and a connecting tube are arranged on a ring spinning frame and used for sucking fiber strands output by a front roller after the broken ends of spun yarns into a main air duct, the flute tube body is a section of flute-shaped tube with two sealed ends, a row of air inlet suction holes and an air outlet are distributed on the flute tube body, each suction hole corresponds to a spindle position, the fiber strands output by the front roller are sucked by the suction holes after the broken ends of the spun yarns, and the connecting tube is a tube connecting the air outlet of the flute tube body with the main air duct and used for feeding the fibers sucked by the suction holes into the main air duct
The detection element is installed at the position, where the flow cross section is long-strip-shaped, of a flute tube body or a connecting pipe of a spinning frame, fibers sucked into a suction hole of the flute tube body pass through the long-strip-shaped flow cross section of the installation position of the detection element, whether the spun yarn spindle position corresponding to the flute tube body is broken or not is judged by detecting whether the fibers pass through the cross section of the installation position of the detection element or not through the detection element, if the fibers pass through the cross section of the installation position of the detection element, the spun yarn spindle position corresponding to the flute tube body is broken, and if not, the spun yarn spindle position corresponding to the flute tube body is not broken.
2. The method for detecting broken ends of spun yarn according to claim 1, wherein the detecting elements are photoelectric or capacitive detecting elements, the photoelectric detecting elements are attached to both ends of the elongated flow cross section at a relatively long distance, and the capacitive detecting elements are attached to both inner side surfaces of the elongated flow cross section at a relatively short distance.
3. The method for detecting broken ends of spun yarn according to claim 1, wherein a flow area of a cross section at the position where the detecting element is installed is larger than a total flow area of the suction holes of the capillary body, and a distance between an inner side of the flow section at the position where the detecting element is installed and a nearer end surface is less than 10 mm.
4. The method for detecting broken ends of spun yarn according to claim 1, wherein a distance between an inner side of the cross section at the position where the detecting element is installed and both end surfaces is 2 to 6mm, and a detection area of the detecting element covers an entire cross section through which the fiber passes at the position where the detecting element is installed.
5. The method for detecting broken ends of spun yarn according to claim 1, wherein a distance between the inner side of the cross section at the position where the detecting element is attached and the two end faces is 3 to 4 mm.
6. A yarn suction component with broken end detection function is arranged on a ring spinning frame, and is used for sucking fiber strands output by a front roller after the broken end of spun yarn into a main air pipe and judging the broken end of the spun yarn in a segmented manner by detecting whether the fiber strands are sucked or not, and is characterized in that the broken end detection method of claim 1 is adopted to detect the broken end of the yarn suction component, and comprises a flute pipe body, a connecting pipe and a detection element,
the detection element is arranged on the flute pipe body or the connecting pipe, the flow cross section of the position of the flute pipe body or the connecting pipe where the detection element is arranged is in a long strip shape, fibers sucked into any suction hole on the flute pipe body pass through the long strip flow cross section of the position of the detection element, and the detection element is a photoelectric detection element or a capacitance detection element.
7. The yarn sucking member with a cut-off detecting function according to claim 6, wherein the photoelectric detecting element includes a light emitting device and a photoelectric device, the photoelectric detecting element is installed at both ends of the elongated flow cross section at a longer distance, the capacitive detecting element is installed at both inner side surfaces of the elongated flow cross section at a shorter distance, and a distance between both end surfaces of the elongated flow cross section at a shorter distance is less than 10 mm.
8. The yarn sucking member with a broken end detecting function according to claim 6, further characterized in that the distance between the inner side of the flow cross section at the position where the detecting element is installed and the two end faces is 2 to 6mm, and when the detecting element is installed on the whistle body, the detecting area of the detecting element is adjacent to the suction hole.
9. The yarn sucking member with a broken end detecting function according to claim 6, further characterized in that the distance between the inner side of the flow cross section at the position where the detecting element is installed and the two end faces is 3 to 4mm, the connecting pipe is a variable cross-section pipe, and the minimum dimension of the flow cross section at the position where the detecting element is installed is not larger than the dimension of the detecting area of the detecting element in the direction.
10. The yarn sucking component with the function of detecting broken ends as claimed in claim 6, wherein the yarn sucking component with the function of detecting broken ends is provided with a detection circuit, the detection element is electrically connected to the detection circuit, the detection circuit judges whether fibers are sucked by the suction holes or not according to the change of the amplitude of the output signal of the detection element, if the detection circuit detects that the fibers are continuously sucked, the spindle position corresponding to the flute tube body is considered to have broken ends, otherwise, no broken ends exist, and the detection circuit is provided with a broken end indicator lamp.
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