Broken yarn drawing device and steam drawing machine thereof
By designing a wire breaking extraction device in a steam drafter, and using a telescopic cylinder, guide wheel structure and a wire suction gun to deal with the wire breaking, the problem of broken wire clumping is solved, the production efficiency is improved and the cost is reduced.
Patent Information
- Application Number
- CN202422081477.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-08-27
AI Technical Summary
In steam drafting machines, the wire cannot be processed in time after breaking, resulting in the wire breaking into a clump of the fiber channel, which is difficult to clean, affecting production efficiency and cost.
A wire-breaking extraction device is designed, including a mounting bracket, a telescopic cylinder and a guide wheel structure. The telescopic cylinder automatically retracts when a wire break is detected. The guide wheel pulls the broken wire out of the steam drafter, and combines the wire-sucking gun, tension sensor and wheel stopper to achieve automatic and timely processing of the broken wire.
Effectively prevent broken wires from forming into a clump in the steam drafter, avoid blocking fiber channels, reduce cleaning difficulties, prevent roll wrapping, improve production efficiency and reduce costs.
Smart Images
Figure CN223150708U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of fiber production equipment design, and particularly relates to a broken wire extraction device and a steam drawing machine thereof. Background Art
[0002] Polyacrylonitrile-based carbon fiber is an inorganic high-molecular fiber with a carbon content of more than 90%. It is prepared by high-temperature treatment using polyacrylonitrile fiber (i.e., polyacrylonitrile-based precursor fiber) as the precursor. It has been widely used in the fields of aerospace, national defense construction, low-altitude economy, cultural and sports leisure, new energy, infrastructure, etc., and its application fields are further expanding.
[0003] The preparation of polyacrylonitrile fiber needs to go through processes such as stock solution polymerization, degassing, coagulation molding, water washing, hot water drawing, oiling, drying densification, and steam drawing. The steam drawing is carried out on a high-pressure steam drawing machine. The steam drawing machine is a key equipment to realize the high-strengthening and fine-denier of fibers, and is composed of a drawing cavity and decompression cavities and waste discharge cavities on both sides of the drawing cavity. Multiple groups of decompression elements are arranged in the decompression cavity; drawing tubes (the drawing tubes are arranged in parallel at intervals with each other) are arranged in the drawing cavity, and the fibers sequentially pass through the waste discharge cavity on the inlet side, the decompression cavity on the inlet side, the drawing cavity, the decompression cavity on the outlet side, and the waste discharge cavity on the outlet side to complete the entire steam drawing process.
[0004] In the industrial production process of polyacrylonitrile fiber, due to improper setting of the steam drawing process, broken filaments from the previous process being brought into the steam drawing machine, etc., broken filaments occur during the steam drawing process, and the broken filament positions generally appear in the decompression cavity on the inlet side. Since the operator cannot handle the broken filaments in time after the broken filaments occur, the head of the broken filaments often forms a mass due to the action of hot steam in the decompression cavity, blocking the fiber channel, being not easy to clean, resulting in steam waste, reduced production efficiency, and increased production cost. Summary of the Utility Model
[0005] Therefore, the utility model provides a broken wire extraction device and a steam drawing machine thereof, which can solve the technical problem in the prior art that after the fiber filament breaks in the steam drawing machine, the broken wire cannot be processed in time, resulting in forming a mass under the action of the hot steam in the decompression cavity, blocking the fiber channel, and being not easy to clean.
[0006] To solve the above problems, the present utility model provides a broken wire extraction device, which is arranged on the inlet side of the fiber bundle of a steam drafting machine and includes a mounting bracket. A telescopic cylinder is assembled on the first side surface of the mounting bracket. A first guide wheel is provided at the free end of the telescopic rod of the telescopic cylinder. A second guide wheel and a third guide wheel are also provided on the first side surface and are respectively located on both sides of the first guide wheel. The fiber bundle is sequentially tensioned on the first guide wheel, the second guide wheel and the third guide wheel along the drawing direction of its penetration. The telescopic rod has an extended position and a retracted position. When the telescopic rod is in the extended position, the telescopic rod applies a preset tension to the fiber bundle in the drafting state via the first guide wheel. When the telescopic rod is in the retracted position, the telescopic rod extracts a part of the fiber bundle in the broken wire state via the first guide wheel.
[0007] In some embodiments, the broken wire extraction device further includes a wire suction gun, and the negative pressure suction port of the wire suction gun is located on the traction path of the penetration of the fiber bundle.
[0008] In some embodiments, the wire suction gun is assembled on the first side surface, and the negative pressure suction port corresponds to the top surface area of the first guide wheel in the retracted position.
[0009] In some embodiments, the displacement of the telescopic rod from the extended position to the retracted position is L1, and the distance between the inlet of the waste discharge chamber on the inlet side of the steam drafting machine and the outlet of the decompression chamber is L2, and 2L1≥L2≥L1.
[0010] In some embodiments, the broken wire extraction device further includes a tension sensor and an alarm element. The first guide wheel is connected to the free end of the telescopic rod through the tension sensor. The alarm element is configured to be triggered to send an alarm message when the tension detected by the tension sensor is lower than a preset tension value.
[0011] In some embodiments, the broken wire extraction device further includes a wheel stopper, and the wheel stopper is assembled on the first side surface. The wheel stopper is used to brake the second guide wheel when the fiber bundle breaks.
[0012] In some embodiments, the wheel stopper is an electromagnetic wheel stopper, and the electromagnetic wheel stopper is configured to be triggered to operate to brake the second guide wheel when the tension detected by the tension sensor is lower than the preset tension value, and to release the braking of the second guide wheel after the wire suction gun operates for a preset time.
[0013] In some embodiments, the connecting lines of the projection points of the rotation centers of the first guide wheel, the second guide wheel and the third guide wheel on the first side surface form an isosceles triangle with the rotation center of the first guide wheel as the vertex.
[0014] In some embodiments, the telescopic cylinder is a pneumatic cylinder.
[0015] The present utility model further provides a steam drawing machine, which includes a broken wire extraction device arranged on the inlet side of the fiber filament bundle of the steam drawing machine, and the broken wire extraction device is the above-mentioned broken wire extraction device.
[0016] A broken wire extraction device and a steam drawing machine provided by the present utility model have the following beneficial effects:
[0017] When the telescopic cylinder is in the extended position, it always applies a relatively constant tension to the fiber filament bundle. When a broken wire occurs in the fiber filament bundle in the steam drawing machine, that is, when the fiber filament bundle is in a broken wire state, the telescopic cylinder will switch from the extended position to the retracted position under the action of the aforementioned tension, and the broken wire will be automatically and timely drawn out of the steam drawing machine following the rising first guide wheel, thereby effectively preventing the broken wire from forming a mass under the action of the hot steam in the steam drawing machine, blocking the fiber channel and being difficult to clean, and also preventing the occurrence of a large-area winding phenomenon of the fiber filament bundle on the drawing roller. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. The drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.
[0019] Figure 1 is a schematic diagram of the relative position relationship between the broken wire extraction device and the steam drawing machine in an embodiment of the present utility model, in which the telescopic rod of the broken wire extraction device is in the extended position;
[0020] Figure 2 is Figure 1 a side view structural schematic diagram of the broken wire extraction device in
[0021] Figure 3 is a schematic diagram of the relative position relationship between the broken wire extraction device and the steam drawing machine in an embodiment of the present utility model, in which the telescopic rod of the broken wire extraction device is in the retracted position;
[0022] Figure 4 is Figure 3 a side view structural schematic diagram of the broken wire extraction device in
[0023] The reference numerals are:
[0024] 4. Filament extraction device; 41. Mounting bracket; 42. Telescopic cylinder; 421. Telescopic rod; 422. First guide wheel; 423. First mounting seat; 424. Second mounting seat; 431. Second guide wheel; 432. Third guide wheel; 44. Silk suction gun; 45. Tensile sensor; 46. Wheel stopper; 400. Fiber tow; 501. Waste discharge chamber; 502. Decompression chamber; 503. Steam drawing chamber; 600. Drawing roller. Detailed implementation mode
[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0026] In the description of the present invention, it should be understood that orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc., usually indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the protection scope of the present invention; the orientation terms "inside, outside" refer to the inside and outside relative to the outline of each component itself.
[0027] For the convenience of description, spatial relative terms such as "above...", "above...", "on the upper surface of...", "above" can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned "below other devices or structures" or "below other devices or structures" afterwards. Thus, the exemplary term "above..." can include both the orientation of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations are made for the spatial relative descriptions used here.
[0028] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without additional statements, the above terms have no special meaning, so it cannot be understood as a limitation on the protection scope of the present utility model.
[0029] Referring to Figures 1 to 4 As shown, according to an embodiment of the present utility model, a broken wire extraction device is provided, which is arranged on the inlet side of the fiber bundle 400 of a steam drawing machine. It includes a mounting bracket 41, which serves as the mounting carrier of the entire device and can be fixedly supported on the mounting platform or form a fixed connection with the external structure of the steam drawing machine. A telescopic cylinder 42 is assembled on the first side surface of the mounting bracket 41 through a first mounting seat 423. A first guide wheel 422 is provided at the free end of the telescopic rod 421 of the telescopic cylinder 42. Second guide wheels 431 and third guide wheels 432 are also provided on the first side surface and are respectively located on both sides of the first guide wheel 422 (referring to the orientation shown in Figure 1 , that is, the left and right sides). The fiber bundle 400 is sequentially tensioned on the first guide wheel 422, the second guide wheel 431, and the third guide wheel 432 along its threading and drawing direction (referring to the orientation shown in Figure 1 , that is, from left to right). Referring to Figure 1 As shown, the fiber bundle forms wrap angles on the first guide wheel 422, the second guide wheel 431, and the third guide wheel 432 respectively. Among them, the center of curvature of the wrap angle formed on the first guide wheel 422 is lower, the center of curvature of the wrap angle formed on the second guide wheel 431 is on the left, and the center of curvature of the wrap angle formed on the third guide wheel 432 is on the right. The telescopic rod 421 has an extended position and a retracted position. When the telescopic rod 421 is in the extended position, the telescopic rod 421 applies a preset tension to the fiber bundle 400 in the drawing state via the first guide wheel 422, that is, the telescopic cylinder 42 applies a vertically upward tension to the fiber bundle 400, and the magnitude of this tension is relatively constant during the normal steam drawing process of the fiber bundle 400. When the telescopic rod 421 is in the retracted position, the telescopic rod 421 extracts a part of the fiber bundle 400 in the broken wire state via the first guide wheel 422, that is, when the fiber bundle 400 breaks due to any reason in the steam drawing machine, due to the tension application effect of the telescopic rod 421 in the extended position, the telescopic rod 421 will rise a certain distance, and the first guide wheel 422 will carry the broken wire on it and rise a certain distance, so as to extract the broken wire in the steam drawing machine.
[0030] In this technical solution, when the telescopic rod 421 is in the extended position, it always applies a relatively constant tension to the fiber bundle 400. When a filament break occurs to the fiber bundle 400 in the steam drawing machine, that is, when the fiber bundle 400 is in a filament break state, the telescopic rod 421 will switch from the extended position to the retracted position under the action of the aforementioned tension. The broken filament will be automatically and timely drawn out of the steam drawing machine following the rising first guide wheel 422, thereby effectively preventing the broken filament from forming a mass under the action of the hot steam in the steam drawing machine, blocking the fiber channel and being difficult to clean. It can also prevent a large area of roll wrapping of the fiber bundle on the drawing roller from occurring.
[0031] The aforementioned telescopic cylinder 42 can specifically be a hydraulic cylinder, a pneumatic cylinder or other mature structures commonly used in the market. As a preference, the aforementioned telescopic cylinder 42 is implemented by a pneumatic cylinder, which can directly use the pressure air source in the workshop, is convenient to clean and has a low cost. It can be understood that when the telescopic rod 421 is in the extended position, the pressure in the lower chamber formed by the piston of the telescopic rod 421 separating the inner cavity of the cylinder should be higher than the pressure in the upper chamber (see the orientation shown in Figure 1 ), and the pressure difference remains stable, so as to ensure the purpose of applying a relatively constant tension to the fiber bundle 400 during the operation process, and at the same time, when the fiber bundle 400 breaks, use this pressure difference to timely switch the telescopic rod 421 from the extended position to the retracted position, so as to achieve the purpose of drawing the broken filament out of the steam drawing machine in the first time.
[0032] Specifically, referring to Figure 1 and Figure 3 shown, in Figure 1 , the telescopic rod 421 is in the extended position. At this time, the fiber bundle 400 passes through the steam drawing machine from left to right to realize its own steam drawing; when a filament break occurs due to improper setting of the steam drawing process, broken filaments in the previous process (that is, the upstream process) being brought into the steam drawing machine, etc., the telescopic rod 421 automatically rises and switches to the retracted position under the action of the constant tension. As shown in Figure 3 , at this time, due to the rising of the first guide wheel 422, the fiber bundle 400 wrapped on its top surface is pulled upward, so as to draw the broken filament of the filament bundle out of the steam drawing machine.
[0033] As a more preferred embodiment, the broken wire extraction device also includes a wire suction gun 44, the negative pressure suction port of the wire suction gun 44 is located on the traction path of the fiber bundle 400, and it is assembled and connected between the second mounting seat 424 and the mounting bracket 41, so that when the fiber bundle 400 is broken, it can be operated in time to absorb the broken wire bundle therein, so as to prevent the broken wire from being entangled with other adjacent wire bundles, which is detrimental to other normally running wire bundles. The aforementioned wire suction gun 44 can be a commonly used negative pressure wire suction gun in the industry. The utility model does not intend to improve its specific structure, but only utilizes its negative pressure adsorption capability, that is, it can use a commercially available part that can form adsorption force on the fiber bundle 400.
[0034] In a specific embodiment, the wire suction gun 44 is assembled on the first side surface, and the negative pressure suction port corresponds to the top surface area of the first guide wheel 422 in the retracted position, see Figure 3 As shown, the wire suction gun 44 is arranged so as to correspond to the top surface area of the first guide wheel 422 connected to the free end of the telescopic rod 421 in the retracted position, which can ensure the stability of the relative position between the broken wire and the wire suction gun 44, and prevent the broken wire from changing its position due to the lack of necessary stretching tension, resulting in a large deviation between the position of the negative pressure gun mouth of the wire suction gun 44 and the position of the wire bundle, and failing to achieve effective adsorption.
[0035] In some embodiments, the displacement of the telescopic rod 421 from the extended position to the retracted position is L1 (not labeled in the figure), and the distance between the inlet of the exhaust chamber 501 on the inlet side of the steam drawing machine and the outlet of the decompression chamber 502 is L2 (such as Figure 3 As shown), 2L1≥L2≥L1, thereby ensuring that when the second guide wheel 431 rises with the telescopic rod 421 and switches to the retracted position, the broken wire can be completely pulled out of the steam drawing machine without being separated from the top surface of the first guide wheel 422, that is, the broken wire has a portion that wraps around the top surface area of the first guide wheel 422, thereby ensuring the wire suction function of the wire suction gun 44.
[0036] In some embodiments, the broken wire extraction device further includes a tension sensor 45 and an alarm element (not shown in the figure). The first guide wheel 422 is connected to the free end of the telescopic rod 421 through the tension sensor 45. The alarm element is configured to be triggered to send an alarm message when the tension detected by the tension sensor 45 is lower than a preset tension value. The aforementioned tension sensor 45 can be a sensor on the market that meets the tension measurement range and accuracy. The aforementioned alarm element can, for example, be a commonly used sound, light, and electricity element on the market, such as a buzzer, an LED lamp, or even a corresponding display terminal (such as a mobile phone). Specifically, the alarm element can be a buzzer, and the on / off of its circuit is controlled by the signal sent by the tension sensor 45. That is, when the real-time tension detected by the tension sensor 45 is lower than the preset tension value, the circuit switch of the buzzer is triggered to close, and the buzzer operates to emit a beeping sound to prompt the operator to perform corresponding processing in a timely manner to prevent waste of raw materials.
[0037] In another preferred embodiment, the broken wire extraction device further includes a wheel stopper 46. The wheel stopper 46 is assembled on the first side surface. The wheel stopper 46 is used to brake the second guide wheel 431 when the fiber filament bundle 400 breaks. That is, when the filament breaks, the second guide wheel 431 is timely braked by the wheel stopper 46 to prevent the upstream fiber filament bundle 400 from continuing to supply wire downstream, thereby preventing waste of raw materials. As a preferred embodiment, the wheel stopper 46 is an electromagnetic wheel stopper (that is, a wheel stopper that realizes braking control through electric control). The electromagnetic wheel stopper is configured to be triggered to operate to brake the second guide wheel 431 when the tension detected by the tension sensor 45 is lower than the preset tension value, and to release the braking of the second guide wheel 431 after the suction gun 44 operates for a preset time. At this time, it can be understood that the suction gun 44 will further suck away the fiber filament bundle introduced by the second guide wheel 431 to prevent roll winding. In this technical solution, the start of the electromagnetic wheel stopper and the tension sensor form an interlock, which can stop the supply of the upstream filament at the first time when the filament breaks and prevent a large-area roll winding phenomenon of the fiber filament bundle on the drafting roller. It can be understood that the device is configured with a corresponding controller. The detection signal of the aforementioned tension sensor 45 is fed back to the controller, and the detection signal and the preset value (that is, the aforementioned preset tension value) are compared in size in the controller. When the judgment result is that the real-time tension is lower than the preset tension value, it indicates that the filament has broken. At this time, the controller can send a corresponding control signal to control the suction gun 44 to operate with negative pressure adsorption, and at the same time control the wheel stopper 46 to operate to brake the second guide wheel 431.
[0038] For specific reference Figure 1As shown, the connecting line of the projection points of the rotation centers of the first guide wheel 422, the second guide wheel 431, and the third guide wheel 432 on the first side forms an isosceles triangle with the rotation center of the first guide wheel 422 as the vertex. The rotation centers of the second guide wheel 431 and the third guide wheel 432 are on the same horizontal line to ensure the horizontal guiding of the fiber bundle 400. In a specific embodiment, the first guide wheel 422, the second guide wheel 431, and the third guide wheel 432 are all implemented by guide wheels of the same size specification.
[0039] According to an embodiment of the present invention, there is also provided a steam drawing machine, including a broken wire extraction device 4 disposed on the inlet side of the fiber bundle 400 of the steam drawing machine, and the broken wire extraction device 4 is the above-mentioned broken wire extraction device.
[0040] It is easy for those skilled in the art to understand that, on the premise of no conflict, the advantageous technical features of the above various methods can be freely combined and superimposed.
[0041] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A wire break extraction device, characterized in that, It is disposed on the inlet side of the fiber tow (400) of the steam drafting machine and includes a mounting bracket (41). A telescopic cylinder (42) is assembled on the first side of the mounting bracket (41). A first guide wheel (422) is provided at the free end of the telescopic rod (421) of the telescopic cylinder (42). A second guide wheel (431) and a third guide wheel (432) are also provided on the first side and are respectively located on both sides of the first guide wheel (422). The fiber tow (400) is sequentially tensioned on the first guide wheel (422), the second guide wheel (431), and the third guide wheel (432) along the drawing-in direction. The telescopic rod (421) has an extended position and a retracted position. When the telescopic rod (421) is in the extended position, the telescopic rod (421) applies a preset tension to the fiber tow (400) in the drafting state via the first guide wheel (422). When the telescopic rod (421) is in the retracted position, the telescopic rod (421) withdraws a part of the fiber tow (400) in the broken-filament state via the first guide wheel (422).
2. The wire break extraction device according to claim 1, wherein, It further includes a fiber suction gun (44), and the negative-pressure suction port of the fiber suction gun (44) is on the traction path where the fiber tow (400) penetrates.
3. The wire break extraction device according to claim 2, characterized in that, The fiber suction gun (44) is assembled on the first side, and the negative-pressure suction port corresponds to the top surface area of the first guide wheel (422) in the retracted position.
4. The wire break extraction device according to claim 1, characterized in that, The displacement of the telescopic rod (421) from the extended position to the retracted position is L1, and the distance between the inlet of the waste discharge chamber (501) on the inlet side of the steam drafting machine and the outlet of the decompression chamber (502) is L2, where 2L1≥L2≥L1.
5. The wire breaking and extraction device according to claim 2, wherein, It further includes a tension sensor (45) and an alarm element. The first guide wheel (422) is connected to the free end of the telescopic rod (421) through the tension sensor (45). The alarm element is configured to be triggered to send an alarm message when the tension detected by the tension sensor (45) is lower than a preset tension value.
6. The wire breaking and extracting device according to claim 5, characterized in that, It further includes a wheel stopper (46). The wheel stopper (46) is assembled on the first side, and the wheel stopper (46) is used to brake the second guide wheel (431) when the fiber tow (400) breaks.
7. The wire breaking and extracting device according to claim 6, characterized in that, The wheel stopper (46) is an electromagnetic wheel stopper, and the electromagnetic wheel stopper is configured to be triggered to operate to brake the second guide wheel (431) when the tension detected by the tension sensor (45) is lower than the preset tension value, and release the braking of the second guide wheel (431) after the fiber suction gun (44) operates for a preset time.
8. The wire break extraction device according to claim 1, characterized in that, The connection lines of the projection points of the rotation centers of the first guide wheel (422), the second guide wheel (431), and the third guide wheel (432) on the first side form an isosceles triangle with the rotation center of the first guide wheel (422) as the vertex.
9. The wire break extraction device according to claim 1, characterized in that, The telescopic cylinder (42) is a pneumatic cylinder.
10. A steam drafting machine, comprising a broken filament extraction device (4) arranged on the inlet side of a fiber filament bundle (400) of the steam drafting machine, characterized in that, The broken-filament extraction device (4) is the broken-filament extraction device according to any one of claims 1 to 9.