Cooling device for low-shrinkage twisted polyester industrial yarn

Abstract

The invention belongs to the technical field of industrial yarn processing equipment, and discloses a low-shrinkage type twisted polyester industrial yarn cooling device, which comprises a cooling cylinder, a cooling device, a cooling device and a cooling device, the cooling box communicates with the cooling cylinder, and cooling liquid is contained in the cooling box; the partition plate is arranged in the cooling box and divides the cooling box into a flowing cavity and a cooling cavity, and the cooling cylinder is communicated with the flowing cavity; the cooling fin is arranged on the cooling box, and the refrigerating end of the cooling fin is located in the flowing cavity / cooling cavity; and the circulating part is used for guiding the cooling liquid to circulate between the flowing cavity and the cooling cavity. The cooling box is divided into the flowing cavity and the cooling cavity through the partition plate, forced circulation of cooling liquid between the flowing cavity (making contact with the cooling cylinder) and the cooling cavity (a cooling fin refrigeration area) is achieved by combining the circulating piece driven by the impeller and the circulating pipe, local retention of the cooling liquid is avoided, the heat exchange efficiency is improved, and it is ensured that the surface temperature of the cooling cylinder is uniform; and the shrinkage difference of the wire material caused by temperature difference is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial yarn processing equipment, and specifically relates to a cooling device for low-shrinkage twisted polyester industrial yarns. Background Technique

[0002] As an important industrial material, the cooling process in the production of polyester industrial yarns has a crucial impact on the physical properties and dimensional stability of the yarns. In the twisting process, after the yarns are treated at high temperatures, they need to be quickly cooled to be shaped, avoiding shrinkage and deformation caused by thermal stress.

[0003] With the increasing requirements for low shrinkage rate, high strength, and uniformity in the application fields of industrial yarns, the existing cooling technologies are gradually showing limitations in terms of efficiency and uniformity. The existing cooling devices adopt a single cavity liquid storage and static cooling method, resulting in local retention or temperature difference accumulation of the coolant in the cooling part, and it is difficult to achieve uniform heat dissipation of the yarns.

[0004] Therefore, a cooling device for low-shrinkage twisted polyester industrial yarns is proposed to solve the above problems. Summary of the Invention

[0005] To solve the problems raised in the above background technique, the present invention provides a cooling device for low-shrinkage twisted polyester industrial yarns.

[0006] To achieve the above object, the present invention provides the following technical solution: A cooling device for low-shrinkage twisted polyester industrial yarns, comprising: A cooling cylinder that cools the yarns on the yarn conveying path and is hollow inside; A cooling box that is connected to the cooling cylinder and contains coolant inside; A partition plate that is arranged inside the cooling box to divide it into a flow cavity and a cooling cavity, and the cooling cylinder is connected to the flow cavity; Cooling fins that are arranged on the cooling box, and their refrigerating ends are located in the flow cavity / cooling cavity; A circulation member that guides the coolant to circulate between the flow cavity and the cooling cavity.

[0007] In the above technical solution, preferably, the circulation member includes: An impeller that penetrates through the partition plate, and its liquid delivery side and liquid suction side are respectively connected to the flow cavity and the cooling cavity; A circulation pipe that is respectively connected to the flow cavity and the cooling cavity; A transmission rod, one end of which is connected to the impeller and the other end penetrates through the cooling box; A transmission member, the output end of which is connected to the other end of the transmission rod to drive the transmission rod to rotate circumferentially.

[0008] In the above technical solution, preferably, it further includes: A gear rod, arranged on the outside of the transmission rod; One end of the cooling cylinder is rotatably disposed in the cooling box; The face gear is fixedly connected to the through end of the cooling cylinder and meshes with the gear rod; As the gear rod rotates, the face gear and the cooling cylinder are driven to rotate circumferentially; The liquid separation plate is fixed in the cooling box and one side of the plate extends into the cooling cylinder, forming a liquid guide channel in the flow cavity to flow through the inner surface of the cooling cylinder.

[0009] In the above technical solution, preferably, it also includes: The hole sleeve is arranged on the outside of the wire being transported, and is hollow inside and has air holes on the surface; The filter cartridge is connected to the perforated sleeve; A guide fan is provided in the filter cartridge to guide the air flow to the perforated sleeve; The wind is guided by the guide fan into the perforated sleeve and ejected from the air holes to cool the wire on the wire conveying path.

[0010] In the above technical solution, preferably, the transmission member is a dual-axis motor, one output end of which is connected to the transmission rod, and the other end is connected to the reducer; Also includes: The reciprocating screw rod is connected to the output end of the reducer, and the other end is rotatably arranged on the frame; The movable sleeve is driven on the reciprocating screw rod and is fixedly connected with the sleeve with holes; As the reciprocating screw rotates, the movable sleeve and the hole sleeve are driven to reciprocate in a direction perpendicular to the wire conveying path. The tooth plate is parallel to the moving direction of the moving sleeve and is arranged in the hole sleeve, and the other end is fixed on the frame; The gear cylinder is arranged through the surface of the sleeve with holes and meshes with the gear plate; Inclined exhaust holes are opened on the gear cylinder; The gear cylinder reciprocates with the moving sleeve and is driven by the gear plate to rotate circumferentially.

[0011] In the above technical solution, preferably, the perforated sleeve includes an upper sleeve and a lower sleeve, an air guide sleeve is connected between the upper sleeve and the lower sleeve, the filter cylinder is arbitrarily arranged on the upper sleeve / lower sleeve, and the gear cylinder and the air holes are equidistantly arranged on the upper sleeve and the lower sleeve.

[0012] In the above technical solution, preferably, it also includes: The installation pipe is located outside the cooling box and one end of the installation pipe is connected to the air inlet pipe; The heating end of the cooling fin is arranged through the installation tube; An air conveying member is arranged in the installation pipe and is used to guide the air flow; An air guide tube connected to the other end of the mounting tube; The hot air sleeve has a receiving area inside, and the wire is transported through the receiving area.

[0013] In the above technical solution, preferably, the air delivery member includes a wind guiding plate disposed inside the installation pipe. The wind guiding plate divides the inside of the installation pipe into an air inlet cavity and an air delivery cavity. The air inlet cavity is communicated with the air inlet pipe, and the air delivery cavity is communicated with the air guide pipe. The wind guiding plate is provided with an air suction side and an air outlet side through which an air delivery fan is respectively communicated with the air inlet cavity and the air delivery cavity.

[0014] In the above technical solution, preferably, the transmission rod penetrates through the installation pipe and the wind guiding plate. The air delivery fan is fixedly arranged outside the transmission rod. The other end of the air inlet pipe is located at the perforated sleeve. The hot air sleeve is provided with equally spaced hot air holes.

[0015] In the above technical solution, preferably, the number of the cooling cylinders is at least two and they are arranged in parallel. The wire continuously and alternately winds around the cooling cylinders in a serpentine path to form a multi-stage S-shaped surrounding structure. Among them, the extending direction of the wire between adjacent cooling cylinders is reversely folded at 180°.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention divides the cooling box into a flow cavity and a cooling cavity through a partition plate, and combines a circulating member and a circulating pipe driven by an impeller to realize the forced circulation of the coolant between the flow cavity (contacting the cooling cylinder) and the cooling cavity (cooling fin refrigeration area), avoiding local retention of the coolant, improving the heat exchange efficiency, ensuring uniform surface temperature of the cooling cylinder, and reducing the shrinkage rate difference of the wire caused by temperature difference.

[0017] Further, the rack is cooperated to drive the face gear to drive the cooling cylinder to rotate. The liquid distribution plate forms a liquid guiding flow path in the flow cavity, so that the coolant spirally flows along the inner wall of the cooling cylinder, expanding the contact area between the coolant and the cooling cylinder, enhancing the heat conduction efficiency and improving the cooling effect. At the same time, the rotating action prevents the wire from adhering to the surface of the cooling cylinder.

[0018] Moreover, before the wire contacts the cooling cylinder, the filtered air flow is ejected from the air holes by the perforated sleeve through the air guide fan. Combining the reciprocating lead screw to drive the perforated sleeve to move horizontally and the rotating tooth cylinder to form a swirl flow with the inclined exhaust holes, so that the air flow dynamically covers the surface of the wire, and the temperature difference between the wire and the cooling cylinder can be reduced before contacting the cooling cylinder, the surface temperature fluctuation can be reduced, and the low shrinkage performance can be improved;

[0019] At the same time, the waste gas that contacts and exchanges heat with the wire is ejected from the perforated sleeve, and the waste gas is guided by the air delivery fan into the air inlet pipe, and is heated by the heating end of the cooling fin and then transported to the hot air sleeve. The wire is pre-cooled at the first stage by the hot air holes, that is, before air cooling, the waste gas of air cooling and the heating end of the refrigeration fin are used for heating. The temperature of the ejected air flow is relatively lower than the temperature of the wire, which can achieve the effect of initially reducing the high temperature on the surface of the wire and avoiding quenching stress.

[0020] That is, through the synergistic effect of precooling, air cooling and liquid cooling, the temperature difference of the three-stage cooling gradually expands, which not only avoids the sudden change of shrinkage rate caused by thermal shock, but also realizes the synchronous and uniform heat dissipation of the inner and outer layers of the wire. At the same time, the recycling of waste heat further reduces the overall energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of another perspective of the present invention; Figure 3 is a partial cross-sectional structural diagram of the upper sleeve, lower sleeve, air guide sleeve, air holes, and filter cylinder of the present invention; Figure 4 is a partial cross-sectional structural diagram of the cooling cylinder, cooling box, partition plate, cooling fins, and circulation parts of the present invention; Figure 5 is a three-dimensional structural diagram of the cooling cylinder, partition plate, rack bar, and face gear of the present invention; Figure 6 is a three-dimensional structural diagram of the cooling cylinder, cooling box, and circulation pipe of the present invention; Figure 7 is a three-dimensional structural diagram of the installation pipe, air guide pipe, hot gas sleeve, and hot gas holes of the present invention.

[0022] In the figure: 1. Cooling cylinder; 2. Cooling box; 3. Partition plate; 4. Flow cavity; 5. Cooling cavity; 6. Cooling fins; 7. Circulation parts; 71. Impeller; 72. Circulation pipe; 73. Transmission rod; 74. Transmission parts; 75. Rack bar; 76. Face gear; 77. Liquid distribution plate; 78. Liquid guide flow channel; 79. Reducer; 8. Sleeve with holes; 81. Upper sleeve; 82. Lower sleeve; 83. Air guide sleeve; 9. Air holes; 10. Filter cylinder; 11. Guide fan; 12. Reciprocating lead screw; 13. Frame body; 14. Moving sleeve; 15. Tooth plate; 16. Tooth cylinder; 17. Inclined exhaust holes; 18. Installation pipe; 19. Air inlet pipe; 20. Air delivery parts; 201. Air guide plate; 202. Air inlet cavity; 203. Air delivery cavity; 204. Air delivery fan; 21. Air guide pipe; 22. Hot gas sleeve; 23. Hot gas holes. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below 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 the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Such as Figure 1 、 Figure 4As shown in the figure, the present invention provides a cooling device for low-shrinkage twisted polyester industrial yarns, comprising: A cooling cylinder 1 for cooling the yarn on the yarn conveying path and having a hollow interior; A cooling box 2 connected to the cooling cylinder 1 and containing a coolant therein; A partition plate 3 disposed in the cooling box 2 to divide it into a flow chamber 4 and a cooling chamber 5, and the cooling cylinder 1 is connected to the flow chamber 4; Cooling fins 6 disposed on the cooling box 2, with their refrigerating ends located in the flow chamber 4 / cooling chamber 5; A circulation member 7 for guiding the coolant to circulate between the flow chamber 4 and the cooling chamber 5.

[0025] In the traditional cooling device, the static circulation of the coolant easily forms local high-temperature areas, resulting in uneven cooling of the yarn and inaccurate shrinkage rate control. The above solution solves the problems of coolant retention and low heat exchange efficiency through a dynamic circulation cooling system (partitioning of the flow chamber and the cooling chamber, impeller-driven circulation); the direct contact path design between the cooling cylinder 1 and the yarn, combined with the continuous low-temperature supply of the coolant, realizes synchronous and uniform cooling of the inner and outer layers of the yarn.

[0026] As Figure 4 、 Figure 5 、 Figure 6 shown, the circulation member 7 comprises: An impeller 71 penetrating through the partition plate 3, with its liquid delivery side and liquid suction side respectively connected to the flow chamber 4 and the cooling chamber 5; A circulation pipe 72 respectively connected to the flow chamber 4 and the cooling chamber 5; A transmission rod 73, one end of which is connected to the impeller 71 and the other end of which penetrates through the cooling box 2; A transmission member 74, the output end of which is connected to the other end of the transmission rod 73 to drive the transmission rod 73 to rotate circumferentially.

[0027] It further comprises: A rack 75 disposed outside the transmission rod 73; One end of the cooling cylinder 1 penetrates and is rotatably disposed in the cooling box 2; A face gear 76 fixedly connected to the penetrating end of the cooling cylinder 1 and meshing with the rack 75; The rotation of the rack 75 drives the face gear 76 and the cooling cylinder 1 to rotate circumferentially; A liquid distribution plate 77 fixedly disposed in the cooling box 2 and extending to the inside of the cooling cylinder 1 at one side, forming a liquid guiding flow channel 78 in the flow chamber 4 to flow through the inner surface of the cooling cylinder 1.

[0028] The above solution drives the rotation of the cooling cylinder 1 through the meshing design of the rack 75 and the face gear 76. The liquid distribution plate 77 forms a liquid guiding channel 78 in the flow chamber 4, enabling the cooling liquid to flow spirally along the rotating cylinder wall, expanding the contact area and enhancing the turbulence effect. The rotating cooling cylinder 1 synchronously prevents adhesion on the surface of the wire, reduces frictional damage, and ultimately achieves uniform heat dissipation inside and outside the wire, improving the cooling efficiency and the quality of the wire.

[0029] As Figure 2 , Figure 3 , Figure 4 shown, it further includes: A perforated sleeve 8, arranged outside the wire being conveyed, with a hollow interior and air holes 9 on its surface; A filter cylinder 10, connected to the perforated sleeve 8; A guiding fan 11, arranged inside the filter cylinder 10 to guide the air flow into the perforated sleeve 8; Along with the guiding fan 11, the air flow is guided into the perforated sleeve 8 and ejected from the air holes 9 to cool the wire on the wire conveying path.

[0030] The transmission part 74 is a double-shaft motor, with one output end connected to the transmission rod 73 and the other end connected to the speed reducer 79; It further includes: A reciprocating lead screw 12, connected to the output end of the speed reducer 79, with the other end rotatably arranged on the frame 13; Specifically, the frame 13 can be fixedly arranged on the cooling box 2 or other fixable frames; A moving sleeve 14, drivingly arranged on the reciprocating lead screw 12 and fixedly connected to the perforated sleeve 8; As the reciprocating lead screw 12 rotates, it drives the moving sleeve 14 and the perforated sleeve 8 to reciprocate in a direction perpendicular to the wire conveying path, A toothed plate 15, penetrating through the perforated sleeve 8 parallel to the moving direction of the moving sleeve 14, with the other end fixed to the frame 13; A toothed cylinder 16, penetrating through the surface of the perforated sleeve 8 and meshing with the toothed plate 15; Inclined exhaust holes 17, opened on the toothed cylinder 16; The toothed cylinder 16 is driven to rotate circumferentially by the toothed plate 15 as the moving sleeve 14 reciprocates.

[0031] The perforated sleeve 8 includes an upper sleeve 81 and a lower sleeve 82. A gas guiding sleeve 83 is connected between the upper sleeve 81 and the lower sleeve 82. The filter cylinder 10 can be arbitrarily arranged on the upper sleeve 81 / lower sleeve 82. The toothed cylinder 16 and the air holes 9 are equidistantly arranged on the upper sleeve 81 and the lower sleeve 82.

[0032] The above solution drives through the linkage of a biaxial motor (liquid cooling + air cooling), integrates the reciprocating movement of the perforated sleeve 8 and the function of generating rotational airflow, and realizes the coordinated control of liquid cooling and air cooling of the cooling cylinder with a single power source, solving the problem of energy consumption superposition of multiple systems; through the connection of water cooling and dynamic air cooling, the wire is cooled efficiently and synchronously step by step. And for the air-cooling part, an airflow layer covering the surface of the wire is formed by the air holes 9, and the rotation of the toothed cylinder 16 causes the swirling airflow to be ejected from the inclined exhaust holes 17, realizing the dynamic expansion of the cooling coverage range and enhancing the airflow disturbance, achieving real-time uniform heat dissipation on the surface of the wire and making up for the insufficient cooling of local areas.

[0033] Such as Figure 1 、 Figure 4 、 Figure 7 shown, it further includes: The installation pipe 18 is located outside the cooling box 2, and one end is connected to an air inlet pipe 19; The heating end of the cooling fin 6 penetrates through and is arranged in the installation pipe 18; The air delivery part 20 is arranged in the installation pipe 18 for guiding the air flow; The air guide pipe 21 is connected to the other end of the installation pipe 18; The hot air sleeve 22 has an accommodation area inside, and the wire is transported through the accommodation area.

[0034] The air delivery part 20 includes a wind guide plate 201 arranged in the installation pipe 18. The wind guide plate 201 divides the inside of the installation pipe 18 into an air inlet cavity 202 and an air delivery cavity 203. The air inlet cavity 202 is connected to the air inlet pipe 19, and the air delivery cavity 203 is connected to the air guide pipe 21. An air suction side and an air outlet side that are respectively connected to the air inlet cavity 202 and the air delivery cavity 203 are penetrated through the wind guide plate 201 with an air delivery fan 204.

[0035] The transmission rod 73 penetrates through the installation pipe 18 and the wind guide plate 201. The air delivery fan 204 is fixed on the outer side of the transmission rod 73. The other end of the air inlet pipe 19 is located at the perforated sleeve 8. The hot air sleeve 22 has equally spaced hot air holes 23 inside.

[0036] In the traditional cooling system, energy is wasted due to the unrecovered waste heat, and direct liquid cooling is likely to cause sudden changes in the shrinkage rate of the wire due to excessive temperature difference. Therefore, the above solution realizes the closed-loop utilization of waste heat (the linkage of the installation pipe 18, the air delivery part 20, and the hot air sleeve 22), converts the waste heat into pre-cooling energy, and reduces the refrigeration load of the cooling fin 6, solving the problems of waste heat emission and high energy consumption in the traditional process; the gradient cooling design of the pre-cooling stage (hot air sleeve 22) and dynamic air cooling (perforated sleeve 8) gradually reduces the temperature difference before the wire contacts the cooling cylinder 1, effectively suppressing the concentration of thermal stress and reducing the fluctuation range of the shrinkage rate.

[0037] In addition, the single drive rod 73 synchronously drives the impeller 71 and the exhaust fan 204 to achieve liquid cooling and waste heat transfer. Without the need for a multi-power source structural design, the above effects can be achieved.

[0038] As Figure 2 shown, the number of cooling cylinders 1 is at least two and they are arranged in parallel. The wire is continuously and alternately wound around the cooling cylinders 1 in a serpentine path to form a multi-stage S-shaped surrounding structure. Among them, the extending direction of the wire between adjacent cooling cylinders 1 is reversely folded by 180°.

[0039] The working principle and usage process of the present invention are as follows: The transmission member 74 (a double-shaft motor) drives the drive rod 73 to drive the impeller 71 to rotate, and the coolant in the cooling cavity 5 is input into the flow cavity 4. The cooling fins 6 continuously cool the coolant in the cooling cavity 5. At the same time, the circulation pipe 72 returns the heated coolant in the flow cavity 4 to the cooling cavity 5 to form a closed-loop forced circulation. The liquid distribution plate 77 forms a liquid guiding flow channel 78 in the flow cavity 4 to guide the coolant to spiral flow along the inner wall of the rotating cooling cylinder 1, so as to cool the wire continuously conveyed on the surface of the cooling cylinder; At the same time, guided by the exhaust fan 204 in the installation pipe 18, the hot air ejected from the perforated sleeve 8 is inhaled into the installation pipe 18 through the air inlet pipe 19. After the exhaust fan 204 mixes the hot air with the heat at the heating end of the cooling fins 6, it is conveyed to the hot air sleeve 22 through the air guide pipe 21, and the pre-cooled air flow is ejected from the hot air holes 23 to preliminarily cool the high-temperature wire (the initial temperature is higher than the temperature of the pre-cooled air flow); The wire that has been preliminarily cooled enters the area of the perforated sleeve 8, and the guide fan 11 purifies the external air through the filter cylinder 10 and then introduces it into the perforated sleeve 8, and the air flow is ejected from the air holes 9 and the inclined exhaust holes 17 of the toothed cylinder 16; At the same time, the double-shaft motor drives the reciprocating screw rod 12 to rotate through the speed reducer 79, drives the moving sleeve 14 and the perforated sleeve 8 to move horizontally back and forth, and the toothed cylinder 16 meshes with the fixed toothed plate 15 to rotate, forming a swirling air flow covering the surface of the wire to perform a secondary cooling operation on it; Finally, the wire is continuously wound around multiple parallel cooling cylinders 1 in a serpentine path. In the multi-stage S-shaped surrounding structure with a 180° reverse fold, the coolant fully absorbs the heat of the wire through the spiral flow channel, and the entire cooling operation is completed.

[0040] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0041] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cooling device for low-shrinkage twisted polyester industrial yarn, characterized in that: include: A cooling cylinder (1) cools the wire on the wire conveying path and is hollow inside; A cooling box (2) is connected to the cooling cylinder (1) and contains a cooling liquid; A partition plate (3) is arranged in the cooling box (2) to divide the cooling box (2) into a flow chamber (4) and a cooling chamber (5), wherein the cooling cylinder (1) is in communication with the flow chamber (4); A cooling fin (6) is provided on the cooling box (2), and a cooling end thereof is located in the flow cavity (4) / cooling cavity (5); The circulation member (7) guides the cooling liquid to circulate between the flow cavity (4) and the cooling cavity (5).

2. The cooling device for low-shrinkage twisted polyester industrial yarn according to claim 1, characterized in that: The circulating member (7) comprises: An impeller (71) is disposed through the partition plate (3), and its liquid delivery side and liquid suction side are respectively connected to the flow chamber (4) and the cooling chamber (5); A circulation pipe (72) is respectively connected to the flow chamber (4) and the cooling chamber (5); A transmission rod (73), one end of which is connected to the impeller (71) and the other end of which passes through the cooling box (2); The transmission member (74) has an output end connected to the other end of the transmission rod (73) and drives the transmission rod (73) to rotate in a circumferential direction.

3. The cooling device for low-shrinkage twisted polyester industrial yarn according to claim 2, characterized in that: Also includes: A gear rod (75) is arranged outside the transmission rod (73); One end of the cooling cylinder (1) is rotatably disposed in the cooling box (2); A face gear (76) is fixedly connected to the through end of the cooling cylinder (1) and meshes with the gear rod (75); As the gear rod (75) rotates, the face gear (76) and the cooling cylinder (1) are driven to rotate circumferentially; The liquid separation plate (77) is fixedly mounted in the cooling box (2) and has one side extending into the cooling cylinder (1), forming a liquid guide channel (78) in the flow cavity (4) to flow through the inner surface of the cooling cylinder (1).

4. The cooling device for low-shrinkage twisted polyester industrial yarn according to claim 2, characterized in that: Also includes: A hole sleeve (8) is arranged on the outside of the wire being transported, is hollow inside and has air holes (9) on the surface; A filter cartridge (10) connected to the perforated sleeve (8); A guide fan (11) is arranged in the filter cartridge (10) to guide the air flow into the perforated sleeve (8); The airflow is guided by the guide fan (11) into the perforated sleeve (8) and ejected from the air holes (9) to cool the wire on the wire conveying path.

5. The cooling device for low-shrinkage twisted polyester industrial yarn according to claim 4, characterized in that: The transmission member (74) is a dual-axis motor, one output end of which is connected to the transmission rod (73) and the other end of which is connected to the reducer (79); Also includes: A reciprocating screw rod (12) is connected to the output end of the reducer (79), and the other end is rotatably mounted on the frame (13); A movable sleeve (14) is driven on the reciprocating screw rod (12) and is fixedly connected to the perforated sleeve (8); As the reciprocating screw rod (12) rotates, the movable sleeve (14) and the hole sleeve (8) are driven to reciprocate in a direction perpendicular to the wire conveying path. A tooth plate (15) is arranged in parallel with the moving direction of the moving sleeve (14) and penetrates through the hole sleeve (8), and the other end is fixed to the frame (13); A gear cylinder (16) is provided through the surface of the perforated sleeve (8) and meshes with the gear plate (15); An inclined exhaust hole (17) is provided on the gear cylinder (16); The gear cylinder (16) reciprocates along with the movable sleeve (14) and is driven by the gear plate (15) to rotate in a circumferential direction.

6. The cooling device for low-shrinkage twisted polyester industrial yarn according to claim 5, characterized in that: The perforated sleeve (8) comprises an upper sleeve (81) and a lower sleeve (82); an air guide sleeve (83) is connected between the upper sleeve (81) and the lower sleeve (82); the filter cartridge (10) is arbitrarily arranged on the upper sleeve (81) or the lower sleeve (82); and the gear cylinder (16) and the air holes (9) are equidistantly arranged on the upper sleeve (81) and the lower sleeve (82).

7. The cooling device for low-shrinkage twisted polyester industrial yarn according to claim 4, characterized in that: Also includes: A mounting pipe (18) is located outside the cooling box (2) and one end of which is connected to an air inlet pipe (19); The heating end of the cooling fin (6) is arranged to penetrate into the mounting tube (18); An air conveying member (20) is disposed in the mounting tube (18) and is used to guide air flow; An air guide tube (21) connected to the other end of the mounting tube (18); The hot air jacket (22) has a containing area inside, and the wire material is transported through the containing area.

8. The cooling device for low-shrinkage twisted polyester industrial yarn according to claim 7, characterized in that: The air delivery member (20) comprises an air guide plate (201) arranged in the mounting tube (18), the air guide plate (201) dividing the mounting tube (18) into an air inlet chamber (202) and an air delivery chamber (203), the air inlet chamber (202) being connected to the air inlet tube (19), the air delivery chamber (203) being connected to the air guide tube (21), and a fan (204) having an air suction side and an air outlet side respectively connected to the air inlet chamber (202) and the air delivery chamber (203) being provided through the air guide plate (201).

9. The cooling device for low-shrinkage twisted polyester industrial yarn according to claim 8, characterized in that: The transmission rod (73) passes through the mounting tube (18) and the air guide plate (201); the air delivery fan (204) is fixedly mounted on the outside of the transmission rod (73); the other end of the air inlet pipe (19) is located at the perforated sleeve (8); and the hot air sleeve (22) has hot air holes (23) arranged at equal intervals.

10. A cooling device for low-shrinkage twisted polyester industrial yarn according to any one of claims 1 to 9, characterized in that: The number of the cooling cylinders (1) is at least two and they are arranged in parallel, and the wire material is continuously and alternately wound around the cooling cylinders (1) in a serpentine path to form a multi-stage S-shaped winding structure, wherein the extension direction of the wire material between adjacent cooling cylinders (1) is 180° reversed.

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