Chemical fiber cooling system and method, tensile deformation device and chemical fiber equipment

Abstract

The invention provides a chemical fiber cooling system and method, a tensile deformation device and chemical fiber equipment. The chemical fiber cooling system comprises a cold rail, a cooling piece, a refrigeration assembly and an adjusting piece, wherein the cold rail is arranged between a deformation hot box and a false twisting device and forms a strip-shaped groove for chemical fibers to move, and the adjusting piece is connected with the refrigeration assembly. The cooling piece is at least in contact with the back face of the strip-shaped groove, a cooling pipeline is formed in the cooling piece, the refrigeration assembly is communicated with the two ends of the cooling pipeline to form a refrigerant loop for refrigerant to circularly flow, the adjusting piece comprises a controller and a temperature sensor for collecting the temperature of the cold rail, and the controller is connected with the temperature sensor and the refrigeration assembly. By means of the device, the chemical fibers are rapidly cooled to the false twisting temperature, the temperature is kept constant, and disturbance caused by the external environment to cooling of the chemical fibers is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of textile machinery, and in particular to a chemical fiber cooling system, method, stretching and deformation device and chemical fiber equipment. Background Art

[0002] The texturing machine is a kind of textile machinery, which is mainly used to process untwisted yarns such as polyester (POY) and polypropylene into elastic yarns with medium elasticity and low elasticity through false twisting. The texturing machine is mainly composed of a heating device, a cooling device and a false twisting device. Specifically, the raw yarn is heated by the heating device, and then the yarn is cooled by the cooling device, and then the yarn is deformed by the false twisting device. Among them, the cooling device is mainly used to cool the yarn and stabilize the yarn bundle. It is usually located between the heating device and the false twisting device. By fixing the thermal deformation of the yarn and reducing its thermoplasticity, the yarn has a certain rigidity, which is conducive to the transmission of twist.

[0003] The cooling device in the existing texturing machine is usually a cooling plate (or cold rail) that is directly cooled by the external environment. However, the cold rail is affected by the external environment formed by factors such as different seasons, latitudes, regions, and day and night temperature differences. The cooling effect of the cold rail on the heated silk strips is different, and the efficiency of natural cooling by relying solely on the external environment is low. The silk strips cannot be quickly cooled from high temperature to a suitable false twist temperature when they move at high speed on the conveying path set by the texturing machine. Specifically, in winter in Jiangsu and Zhejiang, the ambient temperature in the workshop where the texturing machine is installed is about 40°C; and in summer, the ambient temperature in the workshop where the texturing machine is installed is about 60°C. The means of naturally cooling the silk strips heated by the heating device by the cold rail using the natural cooling method of air convection in the prior art will lead to serious differences in the temperature of the silk strips after cooling in different seasons and day and night production environments. The false twist process has strict requirements on the false twist temperature. When the false twist process is carried out by the false twist device, the cooling with too high or too low temperature will cause the false twist effect to fluctuate, and even fail to form a reasonable twist of the silk strips. Therefore, the natural cooling method of air convection cannot quickly reduce the silk strip to the false twist temperature, which greatly affects the moving speed of the silk strip on the conveying path set by the texturing machine, resulting in a low moving speed of the texturing machine in the prior art, and thus the texturing machine cannot achieve a high-speed texturing process of more than 900 meters per minute. At the same time, when assembling, the two ends of the cold rail are close to the heating device and the false twist device respectively, and the temperature of the heating device is relatively high, which easily leads to a high temperature at the end of the cold rail close to the heating device, and a low temperature at the end of the cold rail away from the heating device, thereby causing a large temperature difference at both ends of the cold rail, and leading to the problem of uneven cooling of the silk strip, thereby causing the temperature of the silk strip after cooling to show a temperature difference, which is typically manifested in the uneven distribution of the heat flow power of the silk strip, so that the temperature of the silk strip after cooling cannot be maintained at a stable false twist temperature. The superposition of multiple factors such as the temperature difference of the silk strip, the inability to cool to a suitable false twist temperature, and the uneven distribution of the heat flow power of the silk strip will lead to poor false twisting effect, thereby forming elastic silk. In addition, since the cold rail is naturally cooled by the external environment, in order to ensure the cooling effect of the cold rail, the cold rail is usually designed to be longer, and the longer cold rail provides sufficient cooling space for the silk strips. However, this will cause a greater temperature difference between the two ends of the cold rail, and it will also cause defects such as higher cost and heavier weight. Although the prior art also uses corresponding mechanical structures to cool the cold rail, it still uses air convection for natural cooling, and cools the cold rail by cold air. However, the specific heat capacity of air is small, and the silk strips move faster in actual scenes, resulting in the cold rail being unable to quickly cool the silk strips. When the ambient temperature is too high, the method of natural cooling of the cold rail by air convection is obviously unable to cool the silk strips, and has a great adverse effect on the subsequent false twisting process.

[0004] In view of this, it is necessary to improve the cooling device included in the texturizing machine in the prior art to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the above technical problems existing in the cooling device of the existing texturing machine, quickly cool the chemical fiber to the false twisting temperature and keep the temperature constant, so as to avoid the external environment causing disturbance to the cooling of the chemical fiber.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a chemical fiber cooling system, comprising:

[0007] A cold rail disposed between the deformation heat box and the false twisting device and forming a strip-shaped groove for the movement of the chemical fiber, a cooling member, a refrigeration assembly, and an adjusting member connected to the refrigeration assembly;

[0008] The cooling member is in contact with at least the back side of the strip groove, and a cooling pipe is formed inside the cooling member, the refrigeration assembly is connected with both ends of the cooling pipe to form a refrigerant circuit for circulating the refrigerant, and the adjustment member includes: a controller and a temperature sensor for collecting the temperature of the cold rail, and the controller is connected to the temperature sensor and the refrigeration assembly respectively;

[0009] The controller controls the refrigeration component to adjust the local cooling capacity formed on the target cold rail when the refrigerant flows through the cooling pipe in the refrigerant circuit based on the set temperature and the cold rail temperature collected by the temperature sensor, until the temperature difference between the cold rail temperature and the set temperature is within a preset range.

[0010] As a further improvement of the present invention, the cooling element is configured as a plate body, and the plate body is in contact with at least the back side of the chemical fiber being fed into the strip-shaped groove.

[0011] As a further improvement of the present invention, the cooling member is configured as a plurality of plates, and a single plate is in contact with at least a single back side of the chemical fiber fed into the strip-shaped groove.

[0012] As a further improvement of the present invention, the strip groove is partially embedded in the cooling element, and the temperature sensor is arranged on the surface of the cold rail or the surface of the cooling element or inside the refrigerant circuit.

[0013] As a further improvement of the present invention, the refrigeration component includes: a compressor, a heat exchanger and a throttling device connected in sequence through a pipeline, the output end of the compressor is connected to the input end of the heat exchanger, the output end of the heat exchanger is connected to the input end of the throttling device, the output end of the throttling device is connected to the refrigerant input end of the cooling channel, the input end of the compressor is connected to the refrigerant output end of the cooling channel, so as to form the refrigerant circuit between the compressor, the heat exchanger, the throttling device and the cooling device, and the refrigerant includes a refrigerant.

[0014] As a further improvement of the present invention, the heat exchanger is a copper tube and aluminum fin.

[0015] In a second aspect, the present invention further provides a chemical fiber cooling method, which adopts the chemical fiber cooling system of the first aspect, comprising:

[0016] Get the set temperature;

[0017] The cold rail temperature detected by the temperature sensor is collected in real time, and the target speed corresponding to the compressor included in the refrigeration component is calculated based on the temperature difference between the cold rail temperature and the set temperature, and the refrigeration component compressor is controlled to output the target speed to adjust the local cooling capacity formed on the target cold rail when the refrigerant flows through the cooling pipe in the refrigerant circuit, until the temperature difference between the cold rail temperature and the set temperature is within a preset range.

[0018] As a further improvement of the present invention, the calculation formula of the target speed is:

[0019] Where μ(t) is the increment of the controller, K p Refers to the proportional coefficient of the controller, T i is the integral coefficient of the controller; T is the period of the controller, t is the current time, e(t) is the current speed of the compressor, and e(j) is the sum of the speeds of the compressor within the period of the controller.

[0020] In a third aspect, the present invention further provides a stretching deformation device, comprising: a deformation hot box, a false twisting device, and a chemical fiber cooling system as described in any one of the first aspects, wherein the cold rail is arranged on a conveying path formed by the movement of the chemical fiber between the deformation hot box and the false twisting device.

[0021] In a fourth aspect, the present invention further provides a chemical fiber equipment, comprising:

[0022] A yarn rack, a fiber conveying mechanism, a deformation heat box, a chemical fiber cooling system as described in any one of the first aspects, a false twist device and a winding device, wherein the cold rail is arranged on a conveying path formed by the movement of the chemical fiber between the deformation heat box and the false twist device.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] In the present invention, a cooling member is provided on the back side of the cold rail, and the cooling member is in contact with at least the back side of the strip groove formed by the cold rail, and a refrigeration assembly and an adjusting member connected to the refrigeration assembly are provided, a cooling pipe is formed inside the cooling member, and the refrigeration assembly is connected to both ends of the cooling pipe to form a refrigerant circuit for circulating refrigerant, and the adjusting member includes: a controller and a temperature sensor for collecting the temperature of the cold rail, and the controller is respectively connected to the temperature sensor and the refrigeration assembly. The controller controls the refrigeration assembly to adjust the local cooling capacity formed on the target cold rail when the refrigerant flows through the cooling pipe in the refrigerant circuit based on the set temperature and the temperature of the cold rail collected by the temperature sensor, until the temperature difference between the cold rail temperature and the set temperature is within a preset range. The refrigerant circulates in the refrigerant circuit, and the local cooling capacity of the refrigerant is adjusted according to the set temperature and the temperature of the cold rail when flowing through the refrigeration assembly, and then the refrigerant absorbs heat when flowing through the cooling pipe to quickly cool the chemical fiber, and the temperature of the cold rail is controlled based on the set temperature.

[0025] Thus, on the first hand, the cooling is performed quickly by absorbing heat through the refrigerant and the temperature of the cold rail is controlled based on the controller, which reduces the cooling temperature difference compared with the natural cooling of the texturing machine using the external environment in the prior art. The cooling is performed quickly by absorbing heat through the refrigerant, which is more efficient than the cooling by gas in the prior art, thereby ensuring the cooling effect and improving the cooling efficiency, which is conducive to achieving the high speed of the silk strip on the conveying path set by the texturing machine;

[0026] Secondly, controlling the temperature of the cold rail based on the controller can solve the problem of large temperature difference caused by the two ends of the cold rail being close to the deformation hot box and the false twisting device during assembly, ensure the uniformity of the cooling of the silk strip, and improve the uniformity of the heat flow power distribution of the silk strip;

[0027] Thirdly, by absorbing heat through the refrigerant for rapid cooling, the cold rail can be set shorter to solve the problems of large temperature difference between the two ends, high cost, and heavy weight that exist in the prior art when the cooling plate is set longer. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A three-dimensional diagram of the chemical fiber equipment shown in the present invention at a viewing angle;

[0029] Figure 2 A structural diagram of a chemical fiber cooling system in one embodiment;

[0030] Figure 3 A structural diagram of a chemical fiber cooling system in another embodiment;

[0031] Figure 4 A three-dimensional diagram of the guide rail at a certain viewing angle;

[0032] Figure 5 is a perspective view of a cooling element in one embodiment;

[0033] Figure 6 A schematic diagram of the assembly of a cooling element and a cooling rail in one embodiment;

[0034] Figure 7 A schematic diagram of assembling a cooling element and a cooling rail in another embodiment;

[0035] Figure 8 It is a thermal simulation temperature distribution diagram of a cold rail in the prior art under the condition of an ambient temperature of 40°C;

[0036] Fig. 9 It is a thermal power distribution diagram of the surface of the wire strip after the wire strip is cooled by the cold rail equipped with a cooling member according to the present invention under the condition of an ambient temperature of 40°C. DETAILED DESCRIPTION

[0037] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0038] Ginseng Figures 1 to 9 As shown, the present invention shows a specific implementation of a chemical fiber cooling system 10, which can be specifically assembled in a stretching deformation device 100, and is used to quickly cool the heated filaments 40 and stabilize the filament bundles, and by fixing the thermal deformation of the filaments 40, its thermoplasticity is reduced, so that the filaments 40 have a certain rigidity, which is beneficial to the transmission of twist.

[0039] The stretching deformation device 100 includes: a deformation hot box 20, a false twisting device 30 and a chemical fiber cooling system 10. The cold rail 11 included in the chemical fiber cooling system 10 is arranged on a conveying path formed by the movement of the chemical fiber between the deformation hot box 20 and the false twisting device 30. Since the filament 40 (i.e., a form of chemical fiber) moves to form a conveying path when being conveyed from the deformation hot box 20 to the false twisting device 30, the cooling rail 11 is specifically arranged on the conveying path, so that the filament 40 can be quickly cooled during the conveying process of the filament 40 to save space. The filament 40 is first heated at high temperature in the deformation hot box 20, then quickly cooled in the chemical fiber cooling system 10, and finally false-twisted and deformed in the false twisting device 30 to be an elastic filament with medium elasticity and low elasticity.

[0040] Specifically, the chemical fiber cooling system 10 includes: a cold rail 11 that is arranged between the deformation heat box 20 and the false twisting device 30 and forms a strip groove 111 for the chemical fiber to move, a cooling member 12, a refrigeration assembly 13, and an adjustment member 14 connected to the refrigeration assembly 13. The cooling member 12 is in contact with at least the back side of the strip groove 111, and a cooling pipe 121 is formed inside the cooling member 12. The refrigeration assembly 13 is connected to both ends of the cooling pipe 121 to form a refrigerant circuit (not marked) for the circulation of refrigerant. The adjustment member 14 includes: a controller 141 and a temperature sensor 142 for collecting the temperature of the cold rail. The controller 141 is respectively connected to the temperature sensor 142 and the refrigeration assembly 13. Based on the set temperature and the cold rail temperature collected by the temperature sensor 142, the controller 141 controls the refrigeration assembly 13 to adjust the local cooling capacity formed on the target cold rail 11 when the refrigerant flows through the cooling pipe 121 in the refrigerant circuit until the temperature difference between the cold rail temperature and the set temperature is within the preset range. It should be noted that Figure 5 The arrangement of the cooling pipes 121 is only an example, and the arrangement density and arrangement of the cooling pipes 121 can be adjusted according to actual needs. Figure 5 The refrigerant output end 1212 and the refrigerant input end 1211 can be separately arranged, and can also be arranged in a fitted form.

[0041] The controller 141 may adopt a control circuit board based on a single-chip microcomputer architecture, and may adopt any circuit based on PID control in the prior art. Since the selection of the circuit and components of the controller 141 is not the invention point of the present application, those skilled in the art may reasonably set and configure it according to actual needs. Therefore, the selection of the circuit and components of the controller 141 is not described in detail in the present application.

[0042] It should be noted that the target cold rail 11 refers to all the cold rails 11 corresponding to the strip grooves 111 contacted by a single cooling element 12. If a single cooling element 12 is in contact with only the back of a single strip groove 111, the cold rail 11 corresponding to the strip groove 111 is the target cold rail 11 corresponding to the cooling element 12; if a single cooling element 12 is in contact with the backs of multiple strip grooves 111 at the same time, the multiple cold rails 11 corresponding to the multiple strip grooves 111 are the target cold rails 11 corresponding to the cooling element 12. The local cooling capacity refers to the cooling capacity corresponding to the surface where the target cold rail 11 contacts the cooling element 12. When the refrigerant flows in the refrigerant circuit, the local cooling capacity of the refrigerant is first set by the refrigeration component 13, and then the refrigerant flows to the cooling pipe 121 in the refrigerant circuit and absorbs the heat transferred from the chemical fiber to the target cold rail, so as to achieve the purpose of quickly cooling the chemical fiber. Finally, the refrigerant after absorbing the heat flows to the refrigeration component 13 so that the local cooling capacity of the refrigerant is set again by the refrigeration component 13, and so on. When the refrigeration component 13 sets the local cooling capacity of the refrigerant, it is controlled by the controller 141, and the controller 141 controls the refrigeration component 13 to adjust the local cooling capacity formed on the target cold rail 11 when the refrigerant flows through the cooling pipe 121 in the refrigerant loop based on the set temperature and the cold rail temperature collected by the temperature sensor 142, until the temperature difference between the cold rail temperature and the set temperature is within the preset range. The refrigerant loop is formed in the copper tube, and the copper tube connects the refrigerant input end 1211 and the refrigerant output end 1212.

[0043] Based on this, the refrigerant circulates in the refrigerant circuit, and the local cooling capacity of the refrigerant is adjusted according to the set temperature and the cold rail temperature when flowing through the refrigeration component 13. Then, when flowing through the cooling pipe 121, the refrigerant absorbs heat to quickly cool down the fast-moving chemical fiber, especially the chemical fiber moving at a high speed of 850m / s, and accurately controls the cold rail temperature based on the set temperature. Therefore, on the first aspect, the refrigerant absorbs heat for rapid cooling, and the refrigeration component 13 is controlled by the controller 141 and the controller 141 adjusts the local cooling capacity formed on the target cold rail 11 when the refrigerant flows through the cooling pipe 121 in the refrigerant circuit in real time according to the difference between the set temperature and the cold rail temperature, until the temperature difference between the cold rail temperature and the set temperature is within the preset range, so that the cold rail 11 is not affected by the external environment, and the chemical fiber is quickly cooled to the false twist temperature and the temperature is kept constant, so as to avoid the external environment from causing disturbance to the cooling of the chemical fiber. Compared with the prior art texturing machine using the external environment for natural cooling, the cooling temperature difference is reduced. On the one hand, the cooling effect is ensured, and the cooling efficiency is improved; on the other hand, controlling the temperature of the cold rail based on the controller 141 can again solve the problem of large temperature difference caused by the two ends of the cold rail being close to the deformation hot box 20 and the false twisting device 30 respectively during assembly, thereby ensuring the uniformity of cooling of the silk strip 40; on the other hand, the cold rail 11 can be set shorter by absorbing heat by the refrigerant for rapid cooling, so as to solve the problems of large temperature difference at both ends, high cost, and heavy weight existing in the prior art when the cooling plate is set longer; on the fourth hand, rapid cooling by absorbing heat by the refrigerant has higher cooling efficiency than the cold rail using natural convection heat dissipation in the prior art.

[0044] In the present invention, a single chemical fiber cooling system 10 can be provided with a plurality of cold rails 11 between the deformation heat box 20 and the false twisting device 30, and the plurality of cold rails 11 are arranged in an arranged manner, and a plurality of bundles of chemical fibers are moved from the deformation heat box 20 to the false twisting device 30 respectively through the strip grooves 111 respectively formed by the plurality of cold rails 11.

[0045] In one embodiment, Figure 2As shown, the cooling member 12 is configured as a plate 12a, and the plate 12a is in contact with at least the back side of the strip groove 111 where the chemical fiber is fed. One plate 12a is in contact with the back side of the strip grooves 111 respectively formed by a plurality of cold rails 11 at the same time, and the target cold rails 11 corresponding to the plate 12a are the plurality of cold rails 11, and specifically, the plate 12a is arranged on the back side of the cold rail 11, and a cooling pipe 121 is formed inside the plate 12a, and the refrigerant absorbs the heat transferred from the chemical fiber to the target cold rail 11 when flowing in the cooling pipe 121, thereby playing the role of quickly cooling the chemical fiber moving in the strip groove 111. The cold rail 11 is disposed between the deformation heat box 20 and the false twist device 30, and the two ends of the cold rail 11 are respectively close to the deformation heat box 20 and the false twist device 30. Since the temperature of the deformation heat box 20 is relatively high, the plate body 12a can at least form contact with the back side of the chemical fiber being fed into the strip groove 111 (that is, at least form contact with the back side of one end of the strip groove 111 close to the deformation heat box 20). In other words, the plate body 12a can only form contact with the back side of the chemical fiber being fed into the strip groove 111 to reduce the temperature of the end of the cold rail 11 close to the deformation heat box 20, thereby reducing costs while ensuring uniform cooling; or the plate body 12a forms contact with the back side of the strip groove 111 to further ensure uniform cooling. Preferably, the plate body 12a forms contact with the back side of the strip groove 111.

[0046] In one embodiment, Figure 3 As shown, the cooling member 12 is configured as a plurality of plates 12b, and a single plate 12b is in contact with at least the back side of a single chemical fiber fed into the strip groove 111. The single plates 12b are in contact with the back side of the strip groove 111 formed by the single cold rail 11, respectively. At this time, the target cold rail 11 corresponding to the plate 12b is the single cold rail 11, and specifically, the single plate 12b is arranged on the back side of the single cold rail 11, and a cooling pipe 121 is formed inside each plate 12b. When the refrigerant flows in the cooling pipe 121, it absorbs the heat transferred from the chemical fiber to the target cold rail 11, thereby playing the role of quickly cooling the chemical fiber moving in the strip groove 111.

[0047] The cold rail 11 is arranged between the deformation heat box 20 and the false twist device 30, and the two ends of the cold rail 11 are respectively close to the deformation heat box 20 and the false twist device 30. Since the temperature of the deformation heat box 20 is relatively high, the plate 12b at least contacts the back side of the strip groove 111 where the chemical fiber is fed into (i.e., at least contacts the back side of the strip groove 111 at one end close to the deformation heat box 20). In other words, the plate 12b can only contact the back side of the strip groove 111 where the chemical fiber is fed into, so as to only reduce the temperature of the end of the cold rail 11 close to the deformation heat box 20, thereby reducing the interference of the deformation heat box 20 on the cold rail temperature on the surface of the cold rail 11, thereby ensuring high-speed movement and uniform cooling of the filament 40, and reducing the manufacturing cost; or a single plate 12b contacts the back side of a single strip groove 111 to further ensure uniform cooling. Preferably, a single plate 12b contacts the back side of a single strip groove 111.

[0048] It should be noted that the above-mentioned examples of the plate body 12a forming contact with the back sides of multiple strip grooves 111 at the same time and the single plate body 12b forming contact with the back side of a single strip groove 111 are used for illustrative explanation. In other embodiments, at least two plate bodies can be configured at the same time, and the single plate body forms contact with the back side of at least one strip groove 111 at the same time. For example, two plate bodies are configured, one of which forms contact with the back sides of two strip grooves 111, and the other plate body forms contact with the back sides of four strip grooves 111. This embodiment does not make specific limitations on this, but the scope of protection of the present invention cannot be limited thereby.

[0049] The cooling member 12 is disposed on the back side of the cold rail 11, and the cooling member 12 at least contacts the back side of the strip groove 111. Figure 4 As shown, the strip groove 111 formed by the cold rail 11 is concave, and the chemical fiber moves in the strip groove 111 along the direction D, and specifically moves in the strip groove 111 from the end close to the deformation heat box 20 to the end close to the false twisting device 30. In order to prevent the chemical fiber from falling off the strip groove 111 during the movement, the chemical fiber is arranged close to the bottom 114 of the strip groove 111. Based on this, in one embodiment, the reference Figure 6 As shown, the cooling member 12 may only be in contact with the back side of the strip groove 111, and preferably, the cooling member 12 only is in contact with the back side 112 of the bottom 114 of the strip groove 111, thereby the refrigerant flowing in the cooling pipe 121 formed inside the cooling member 12 absorbs the heat transferred from the chemical fiber to the target cold rail 11; in another embodiment, the cooling member 12 may only be in contact with the back side 112 of the bottom 114 of the strip groove 111, and preferably, the cooling member 12 may only be in contact with the back side 112 of the bottom 114 of the strip groove 111, thereby the refrigerant flowing in the cooling pipe 121 formed inside the cooling member 12 absorbs the heat transferred from the chemical fiber to the target cold rail 11; in another embodiment, Figure 7As shown, the cooling member 12 may be provided with a strip opening 113 for partial front placement, and the strip groove 111 is partially embedded in the cooling member 12, thereby increasing the contact area between the back of the strip groove 111 and the cooling member 12, so as to further ensure the cooling effect of the cooling member 12 on the chemical fiber moving in the strip groove 111. Figure 8 and Fig. 9 As shown, since the temperature of the cold rail is concentrated at the bottom 114 of the strip groove 111, by partially embedding the strip groove 111 in the cooling member 12, the heat absorption capacity of the strip groove 111 and the cold rail 11 on the inside and surface of the chemical fiber can be further improved, so that the chemical fiber can be quickly reduced to the required set temperature.

[0050] Ginseng Figure 2 and Figure 3 As shown, the refrigeration assembly 13 includes: a compressor 131, a heat exchanger 132 and a throttle 133 which are connected in sequence through pipelines (i.e., the first pipeline 161, the second pipeline 162, the third pipeline 163 and the fourth pipeline 164 described below), the output end 1312 of the compressor 131 is connected to the input end 1321 of the heat exchanger 132 through the second pipeline 162, the output end 1322 of the heat exchanger 132 is connected to the input end 1331 of the throttle 133 through the third pipeline 163, the output end 1332 of the throttle 133 is connected to the refrigerant input end 1211 of the cooling pipeline 121 through the fourth pipeline 164, the input end 1311 of the compressor 131 is connected to the refrigerant output end 1212 of the cooling pipeline 121 through the first pipeline 161, so as to form a refrigerant loop between the compressor 131, the heat exchanger 132 and the cooling pipeline 121. The heat exchanger 132 acts as a condenser, and the cooling element 12 acts as an evaporator.

[0051] The refrigerant is first compressed in the compressor 131 and converted into a high-temperature and high-pressure refrigerant gas and flows into the heat exchanger 132 from the second pipe 162, then releases heat in the heat exchanger 132 and is converted into a medium-temperature and high-pressure refrigerant liquid and flows into the throttling device 133 from the third pipe 163, then is converted into a low-temperature and low-pressure refrigerant gas-liquid mixture in the throttling device 133 and flows into the cooling pipe 121 from the fourth pipe 164, finally absorbs heat in the cooling pipe 121 and is converted into a low-temperature and low-pressure refrigerant gas and flows into the compressor 131, and then the compressor 131 compresses the refrigerant gas and converts it into a high-temperature and high-pressure refrigerant gas and flows into the heat exchanger 132 from the second pipe 162, thereby circulating in sequence. Preferably, the refrigerant includes a refrigerant (such as R134, R22, R410A, etc.). Compared with the cooling method using water cooling, the circulating refrigerant takes away the heat of the cold rail 11, which will not produce scale and shorten the subsequent maintenance cycle; in addition, the chloride ions contained in the water will also have a certain corrosive effect on the copper tube, and it is not suitable as a heat-absorbing medium for heat exchange. The heat exchanger 132 is a copper tube aluminum fin or other type of heat dissipation component with good heat exchange capability. The throttling device 133 includes a thermal expansion valve, an electronic expansion valve, a capillary tube and a throttling hole, etc. The heat of the heat exchanger 132 is quickly dissipated by a fan (not marked) to dissipate the heat absorbed by the heat exchanger 132.

[0052] It should be noted that the compressor 131 included in the refrigeration component 13 compresses the refrigerant gas under the control of the controller 141. The controller 141 presets the temperature and controls the local cooling capacity formed on the target cold rail 11 when the compressor 131 flows through the cooling pipe 121 in the refrigerant circuit based on the set temperature and the cold rail temperature collected by the temperature sensor 142. This is achieved by adjusting the target speed of the compressor 131 until the temperature difference between the cold rail temperature and the set temperature is within a preset range. The preset range is preferably [-1, 1], so that the cold rail temperature and the set temperature are within ±1°C with a small fluctuation, thereby achieving precise control of the cooling temperature of the chemical fiber by the cold rail 11. Among them, the temperature sensor 142 is arranged on the surface of the cold rail 11 (refer to Figure 3 As shown), or arranged on the surface of the cooling member 12 (see Figure 2 As shown), or arranged inside the refrigerant circuit, which is not specifically limited in this embodiment. The cooling pipe 121 is made of a copper tube with good heat exchange performance, and the cooling element 12 can be made of aluminum alloy. The copper tube is embedded in the cooling element 12 (including 12a and 12b) made of aluminum alloy to form a cooling medium flow channel for the cooling medium to be arranged in a winding manner inside the cooling element 12, so as to fully cool the cooling element 12 and carry away a large amount of heat transferred from the wire 40 by the cooling element 12 absorbing the heat rail 11.

[0053] Based on the particularity of the structure and process requirements of the chemical fiber equipment 200 (i.e., the texturing machine), it is usually kept running around the clock. Therefore, the ambient temperature of the chemical fiber equipment 200 in the same geographical location at different time points on the same day (for example, 20 o'clock in the evening, 1 o'clock in the morning, 12 o'clock in the afternoon, 4 o'clock in the afternoon, etc.) will fluctuate significantly. Therefore, the target speed of the compressor 131 can be adjusted by PID control to adjust the temperature of the cold rail, so as to adapt to the fluctuation of the temperature of the thread strip 40 after cooling due to the fluctuation of the ambient temperature at different time points on the same day in the chemical fiber equipment 200 in the same geographical location, and always keep the temperature of the cold rail and the temperature of the thread strip 40 after cooling at the set value. As an optional embodiment, the set temperature that changes with time can be automatically set inside the controller 141, and a fixed change cycle can be set with the changes of the four seasons of the year. For example, the temperature difference between day and night is large in spring and autumn, and the ambient temperature fluctuation in the workshop also becomes larger. Therefore, in spring and autumn, the controller 141 can be set to a set temperature that follows the law of day and night temperature changes and changes according to the set time interval, and the set time interval can be set to 1 to 2 hours. Thus, the chemical fiber is quickly cooled to the false twist temperature and the temperature is kept constant, the external environment is prevented from disturbing the cooling of the chemical fiber, and more accurate and delicate temperature control of the cold rail temperature and the cooling temperature of the chemical fiber is achieved. In particular, in summer, the ambient temperature in the workshop where the texturing machine is installed is about 60°C, or even higher. At this time, the ambient temperature of the workshop is close to the false twist temperature of POY. If the guide rail relying on natural convection heat dissipation in the prior art is used for cooling, the surface and internal temperature of the silk strip 40 will still be high after the silk strip 40 is cooled in contact with the existing cold rail, and it cannot be quickly reduced to the false twist temperature in a short time. At the same time, the false twist temperature of any existing chemical fiber is usually below 62°C, and the false twist temperature is usually maintained at 55-62°C.

[0054] For the texturing machine for processing polyester, it can process 10-100 dtex (dtex, which refers to the weight of 10,000 meters of fiber or yarn at the standard moisture regain) of yarn 40; for the texturing machine for processing nylon, it can process 20-1000 dtex of yarn 40. The lower the Dtex value, the thinner the yarn 40, and the higher the Dtex value, the thicker the yarn 40. At the same time, the lower the Dtex value, the lower the false twist temperature required (i.e., tending to 55°C), and the higher the Dtex value, the higher the false twist temperature required (i.e., tending to 62°C). Therefore, since the types and thicknesses of the silk strips 40 processed by the texturing machine are different, the chemical fiber cooling system disclosed in this application and the chemical fiber cooling method and chemical fiber equipment disclosed later can also adapt to the false twist deformation treatment of chemical fibers of different thicknesses and varieties by adjusting the set temperature. This has significant technical advantages over the cold rails in the prior art that dissipate heat by natural convection, and also overcomes the technical effect that the cold rails in the prior art cannot adapt to the chemical fibers of different thicknesses and / or varieties to be quickly cooled to a suitable false twist temperature before being sent to the false twist device 30 after being heated by the deformation hot box 20. The chemical fiber equipment in this application can also process polypropylene. It should be noted that the same texturing machine can perform texturing treatment on different types of chemical fibers such as polyester and nylon according to actual production needs, and it does not limit a texturing machine to only process one type of chemical fiber.

[0055] Assume that the temperature of the wire 40 entering the cold rail 11 is 180°C and the temperature leaving the cold rail 11 is 60°C. The cold rail 11 can be made of SUS304 with a density of 7930kg / m 3 , the specific heat capacity is 466J / kg*K, the thermal conductivity is 17W / m*K; the density of the wire 40 is 1390kg / m 3 , the specific heat capacity is 1200 J / kg*K, the thermal conductivity is 0.2 W / m*K; the material of the cooling element 12 is Al, and the density is 2700 kg / m 3 , the specific heat capacity is 948 J / kg*K, and the thermal conductivity is 204 W / m*K. The length of the cold rail 11 is 1100 mm, the wire 40 is in contact with the bottom 114 of the strip groove 111, and the gap between the wire 40 and the surface of the strip groove 111 is 0.1 mm, the surface of the strip groove 111 radiates heat, the emissivity of the cold rail 11 is set to 0.7, the cold rail 11 and the cooling element 12 are set to ideal contact, the interface thermal resistance is very low, the cold rail 11 and the cooling element 12 are defined as natural convection heat dissipation conditions, the ambient temperature is 40 ° C, and the heat transfer coefficient is 10 W / m 2 *K.

[0056] Ginseng Figure 8As shown in FIG. 1 , the experiment shows that, under the condition of an ambient temperature of 40° C., the temperature of the cold rail near the deformation heat box 20 in the prior art is much higher than the temperature of the cold rail near the false twisting device 30, and the temperature difference between the two ends is large. Fig. 9 As shown, after adding the cooling member 12, the temperature of the cold rail is concentrated at the bottom 114 of the strip groove 111, the heat dissipation efficiency is fast, and the heat flux power on the surface of the wire strip 40 is increased. At the entrance of the conveying path formed by the movement of the wire strip 40, the maximum heat flux power on the surface of the wire strip 40 is increased from 0.04991mW to 0.05686mW compared with the natural cooling method using the external environment in the prior art, which is increased by about 14%. Figure 8 and Fig. 9 The thermal simulation analysis software used in this paper is the finite element analysis software Abaqus2018. Fig. 9 It can be seen that after the silk strip 40 contacts and cools the cold rail 11 included in the chemical fiber cooling system of the present invention, the surface temperature of the silk strip 40 basically tends to be consistent, and the temperature of the silk strip 40 sent into the false twisting device 30 is continuously consistent, thereby ensuring the false twisting treatment effect.

[0057] It can be seen that the chemical fiber cooling system 10 shown in the present invention is equipped with a cooling member 12 on the back side of the cold rail 11, so that the heat flow power of the thread strip 40 is increased by about 14%, and if the heat released by the thread strip 40 in the process of decreasing from 180°C to 60°C on the cold rail 11 is fixed, according to the formula Q=P*t, after the cooling member 12 is arranged on the back side of the cold rail 11, the moving speed of the thread strip 40 on the cold rail 11 can be increased. Based on the chemical fiber cooling system 10 in the present application, the moving speed of the chemical fiber in the strip groove 111 is about 800*1.13=904m / min. In the above formula, the parameter Q is the heat, the parameter P is the heat flow power, and the parameter t is the time. In the prior art, the moving speed of the chemical fiber in the cold rail using natural cooling can generally only be maintained at 800m / min, and will be affected by the external environment and cause temperature fluctuations and abnormalities. Therefore, the chemical fiber equipment 200 (i.e., the texturing machine) introduces the chemical fiber cooling system 10 in the present application, which is beneficial to achieving high-speed movement of the silk strip 40 on the conveying path set by the texturing machine, thereby improving the processing efficiency of the chemical fiber equipment 200 for the silk strip 40.

[0058] The chemical fiber cooling system 10 disclosed in the present application is to quickly cool the fiber by absorbing heat through the refrigerant and control the temperature of the cold rail based on the controller 141. Compared with the natural cooling of the texturing machine using the external environment in the prior art, the cooling temperature difference is reduced. The rapid cooling by absorbing heat through the refrigerant is more efficient than the natural cooling method using air convection in the prior art, ensuring the cooling effect and improving the cooling efficiency, and significantly improving the high speed of the fiber strip 40 on the conveying path set by the texturing machine. At the same time, the temperature of the cold rail is controlled based on the controller 141, which solves the problem of large temperature difference caused by the two ends of the cold rail 11 being close to the deformation hot box 20 and the false twisting device 30 during assembly, ensures the uniformity of the fiber strip 40 after cooling, makes the heat flow power distribution of the fiber strip 40 more uniform, and makes the cooling of the fiber strip 40 not affected by the change of ambient temperature, avoiding the external environment from disturbing the cooling of the chemical fiber, thereby finally realizing the precise temperature control of the cold rail temperature and the cooling temperature of the fiber strip.

[0059] Based on the specific implementation of the chemical fiber cooling system 10 disclosed above, the present invention further discloses a chemical fiber cooling method, which uses the chemical fiber cooling system 10 and includes the following steps S1 to S2:

[0060] Step S1, obtaining a set temperature. The set temperature is the temperature of the wire strip 40 after being heated in the deformation hot box 20 and entering the false twisting device 30 after passing through the cold rail 11 according to actual needs, that is, the temperature of the wire strip 40 after cooling. The set temperature can be pre-input in the controller 141.

[0061] Step S2, real-time acquisition of the cold rail temperature (i.e., measured temperature) detected by the temperature sensor 142, calculation of the target speed corresponding to the compressor 131 included in the refrigeration component 13 based on the temperature difference between the cold rail temperature and the set temperature, and control of the refrigeration component 13 to output the target speed, so as to adjust the local cooling capacity formed on the target cold rail 11 when the refrigerant flows through the cooling pipe 121 in the refrigerant circuit, until the temperature difference between the cold rail temperature and the set temperature is within a preset range.

[0062] It should be noted that the calculation formula of the target speed is:

[0063] Wherein, μ(t) refers to the increment of the controller 141, K p refers to the proportional coefficient of the controller 141, T iRefers to the integral coefficient of the controller 141; T refers to the cycle of the controller 141, t refers to the current time, e(t) refers to the current speed of the compressor, and e(j) refers to the sum of the speeds of the compressor within the cycle of the controller. The temperature sensor 142 collects the cold rail temperature of the cold rail 11 in real time and feeds it back to the controller 141. The controller 141 adjusts the target speed output by the compressor 131 based on the temperature difference between the cold rail temperature and the set temperature until the temperature difference between the cold rail temperature and the set temperature is within the preset range, so as to achieve the purpose of precise temperature control of the cold rail 11, so as to ensure that the temperature of the chemical fiber itself is precisely constant during the contact and cooling process with the cold rail 11. The above-mentioned measured temperature is input into the controller 141 as a feedback value and compared with the set temperature to dynamically determine the speed of the compressor, and according to the proportional integral operation, it is determined to maintain, increase or decrease the speed of the compressor to achieve precise temperature control.

[0064] At the same time, the chemical fiber cooling method disclosed in the present application can also flexibly adjust the temperature of the cooled silk strip 40 by setting different set temperatures for the cooling rail temperature. Therefore, it can be flexibly set for different types of chemical fibers to meet the cooling requirements and false twisting temperature requirements of different chemical fibers.

[0065] Based on the above disclosed embodiment of a chemical fiber cooling system 10, the present invention further discloses a stretching deformation device 100. Figure 1 As shown, the stretching deformation device 100 includes: a deformation hot box 20, a false twist device 30, and the chemical fiber cooling system 10 disclosed above, and the cold rail 11 is arranged between the deformation hot box 20 and the false twist device 30 to form a conveying path formed by the movement of the chemical fiber. Since the deformation hot box 20, the false twist device 30 and the fiber conveying mechanism 60 are all prior art, they will not be described in detail here. The specific technical solution of the chemical fiber cooling system 10 included in this embodiment is shown above and will not be repeated here.

[0066] Based on the above disclosed embodiment of a chemical fiber cooling system 10, the present invention further discloses a chemical fiber equipment 200 (ie, a texturing machine), Figure 1 As shown, the chemical fiber equipment 200 includes: a creel 50, a fiber conveying mechanism 60, a deformation heat box 20, a chemical fiber cooling system 10 as disclosed above, a false twisting device 30 and a winding device 70. The cold rail 11 is arranged between the deformation heat box 20 and the false twisting device 30 to form a conveying path formed by the movement of the chemical fiber.

[0067] In view of the fact that the creel 50, the fiber conveying mechanism 60, the deformation hot box 20, the false twist device 30 and the winding device 70 are all prior art, they will not be described in detail here. The silk strip 40 moves from the creel 50 to the fiber conveying mechanism 60, from the fiber conveying mechanism 60 to the deformation hot box 20, from the deformation hot box 20 to the chemical fiber cooling system 10, from the chemical fiber cooling system 10 to the false twist device 30, and from the false twist device 30 to the winding device 70. Optionally, the chemical fiber equipment 200 also includes: a shaping hot box 80 arranged at the bottom of the false twist device 30, and the silk strip 40 moves to the shaping hot box 80 after being false twisted in the false twist device 30, and finally moves from the shaping hot box 80 to the winding device 70. The specific technical scheme of the chemical fiber cooling system 10 included in this embodiment is shown above, and will not be repeated here. It should be noted that nylon may also not need to use the shaping hot box 80 for shaping treatment.

[0068] It should be noted that, for one chemical fiber equipment 200, the refrigeration components 13 configured by the cooling elements 12 on a group of cold rails 11 formed by multiple cold rails 11 can be controlled by the same controller 141 at the same time; for multiple chemical fiber equipment 200, the multiple groups of refrigeration components 13 configured by the multiple cooling elements 12 on the multiple groups of cold rails 11 can also be controlled by the same controller 141 at the same time, and multiple controllers 141 can also be configured for independent control, which is not specifically limited in this embodiment.

[0069] Through the present application, single-point precise temperature control or distributed precise temperature control of the temperature of the cold rail and the cooling temperature of the filaments is also achieved. The so-called single-point precise temperature control refers to the precise temperature control of part of the cold rail 11 or a group of cold rails 11 (the number is not limited, and it can be six) or all the cold rails 11 contained in a chemical fiber equipment 200. The so-called distributed precise temperature control refers to the centralized precise temperature control of all the cold rails 11 contained in multiple chemical fiber equipment 200. The specific implementation means of the chemical fiber cooling system 10 contained in the chemical fiber equipment 200 in this embodiment are described in the previous embodiment and will not be repeated here.

[0070] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

[0071] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0072] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A chemical fiber cooling system, characterized in that: include: A cold rail disposed between the deformation heat box and the false twisting device and forming a strip-shaped groove for the movement of the chemical fiber, a cooling member, a refrigeration assembly, and an adjusting member connected to the refrigeration assembly; The cooling member is in contact with at least the back side of the strip groove, and a cooling pipe is formed inside the cooling member, the refrigeration assembly is connected with both ends of the cooling pipe to form a refrigerant circuit for circulating the refrigerant, and the adjustment member includes: a controller and a temperature sensor for collecting the temperature of the cold rail, and the controller is connected to the temperature sensor and the refrigeration assembly respectively; The controller controls the refrigeration component to adjust the local cooling capacity formed on the target cold rail when the refrigerant flows through the cooling pipe in the refrigerant circuit based on the set temperature and the cold rail temperature collected by the temperature sensor, until the temperature difference between the cold rail temperature and the set temperature is within a preset range.

2. The chemical fiber cooling system according to claim 1, characterized in that: The cooling member is configured as a plate body, and the plate body is in contact with at least the back side of the chemical fiber being fed into the strip-shaped groove.

3. The chemical fiber cooling system according to claim 1, characterized in that: The cooling member is configured as a plurality of plates, and a single plate is in contact with at least a back side of a single chemical fiber fed into the strip-shaped groove.

4. The chemical fiber cooling system according to claim 2 or 3, characterized in that: The strip groove is partially embedded in the cooling element, and the temperature sensor is arranged on the surface of the cooling rail or the surface of the cooling element or inside the refrigerant circuit.

5. The chemical fiber cooling system according to claim 1, characterized in that: The refrigeration component includes: a compressor, a heat exchanger and a throttling device connected in sequence through a pipeline, the output end of the compressor is connected to the input end of the heat exchanger, the output end of the heat exchanger is connected to the input end of the throttling device, the output end of the throttling device is connected to the refrigerant input end of the cooling channel, the input end of the compressor is connected to the refrigerant output end of the cooling channel, so as to form the refrigerant circuit between the compressor, the heat exchanger, the throttling device and the cooling device, and the refrigerant includes a refrigerant.

6. The chemical fiber cooling system according to claim 5, characterized in that: The heat exchanger is a copper tube and aluminum fin.

7. A chemical fiber cooling method, using the chemical fiber cooling system according to claim 5 or 6, characterized in that: include: Get the set temperature; The cold rail temperature detected by the temperature sensor is collected in real time, and the target speed corresponding to the compressor included in the refrigeration component is calculated based on the temperature difference between the cold rail temperature and the set temperature, and the refrigeration component compressor is controlled to output the target speed to adjust the local cooling capacity formed on the target cold rail when the refrigerant flows through the cooling pipe in the refrigerant circuit, until the temperature difference between the cold rail temperature and the set temperature is within a preset range.

8. The chemical fiber cooling method according to claim 7, characterized in that: The target speed is calculated as follows: Where μ(t) is the increment of the controller, K p Refers to the proportional coefficient of the controller, T i is the integral coefficient of the controller; T is the cycle of the controller, t is the current time, e(t) is the current speed of the compressor, and e(j) is the sum of the speeds of the compressor within the cycle of the controller.

9. A stretching deformation device, characterized in that: include: A deformation heat box, a false twisting device, and a chemical fiber cooling system as claimed in any one of claims 1 to 6, wherein the cooling rail is arranged on a conveying path formed by the movement of the chemical fiber between the deformation heat box and the false twisting device.

10. A chemical fiber equipment, characterized in that: include: A yarn rack, a fiber conveying mechanism, a deformation heat box, a chemical fiber cooling system as described in any one of claims 1 to 6, a false twist device and a winding device, wherein the cold rail is arranged between the deformation heat box and the false twist device to form a conveying path formed by the movement of the chemical fiber.

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