Dacron DTY (Draw Textured Yarn) drafting and heat setting device

Abstract

The utility model relates to the technical field of polyester DTY (Draw Textured Yarn) processing, in particular to a polyester DTY drafting and heat setting device which comprises a box body and yarn penetrating holes formed in the two ends of the box body respectively, and two first V-shaped guide wheel assemblies are rotatably connected to an inner cavity of the box body at intervals; a swing type tensioning wheel assembly capable of adjusting the tensioning force is rotationally connected between the two first V-shaped guide wheel assemblies. A V-shaped air blowing head assembly is arranged below the swing type tensioning wheel assembly, and a hot air supply assembly communicated with an inner cavity of the V-shaped air blowing head assembly is further included. The left side face of the box body is connected with a second V-shaped guide wheel assembly, and a winding drum system is arranged on the inclined lower portion of the side, away from the box body, of the second V-shaped guide wheel assembly. The device is reasonable in structure, the product quality is enhanced, the operation difficulty is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polyester DTY yarn processing, in particular to a drafting and heat-setting device for polyester DTY yarn. Background Art

[0002] Polyester, also known as polyester fiber, is a synthetic fiber obtained by spinning polyester formed by the polycondensation of organic dibasic acid and diol, referred to as PET fiber, which is a polymer compound. Polyester is widely used in civil and industrial fabrics due to its high strength, high modulus and low water absorption. After the polyester yarn is produced, it needs to be stretched and shaped to reduce the bending and wrinkling caused by direct winding. Authorization announcement No. CN 219239898U discloses a stretching and heat-setting device for low-elastic polyester DTY yarn, including a support frame, the four corners of the bottom of the support frame are equipped with base feet, the left side of the support frame is equipped with a mounting frame, the middle of the front end of the support frame is staggered with a fixing frame, the end of the fixing seat facing the fixing frame is equipped with a heating hole, and the outside of the fixing seat is equipped with a fan. The low-elastic polyester DTY yarn stretching and heat-setting equipment is provided with a fixed seat, a heating wire, a drawing roller and a fan. When the fan and the heating wire are started, the heating wire begins to heat the interior and at the same time, under the action of the fan, air is driven into the interior of the fixed seat. After the airflow contacts the internal heating wire, the hot air is discharged outward from the heating hole, heating the polyester yarn passing between the drawing rollers. After being heated, it is stretched by the drawing roller, which can reduce bending, improve the quality of setting, and solve the problem of poor setting effect.

[0003] The above-mentioned prior art solutions have the following defects: the force for stretching the polyester DTY yarn cannot be properly adjusted according to the different diameters of the polyester DTY yarn, that is, the drafting has a significant impact on the thickness of the polyester DTY yarn, which reduces the quality of the product. In addition, after a set of winding is completed, the bolts need to be removed, and the winding roller needs to be moved back and forth to disengage the disassembly block from the inside of the limit seat. The winding roller can be removed and replaced with a new set of winding rollers, which increases the difficulty of operation and reduces work efficiency. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide a drafting and heat-setting device for polyester DTY yarn, which enhances the quality of the product, reduces the difficulty of operation and improves the work efficiency.

[0005] To solve the above technical problems, the present invention adopts a technical solution: providing a drafting and heat-setting device for polyester DTY yarn, comprising: a box body and threading holes respectively provided at both ends thereof, wherein the inner cavity of the box body is rotatably connected to two first V-shaped guide wheel assemblies at intervals, and a swing-type tensioning wheel assembly with adjustable tensioning force is rotatably connected between the two first V-shaped guide wheel assemblies;

[0006] A V-shaped blowing head assembly is provided below the swing type tension wheel assembly, and also includes a hot air supply assembly communicated with the inner cavity of the V-shaped blowing head assembly;

[0007] The left side of the box is connected to a second V-shaped guide wheel assembly, and a winding drum system is provided obliquely below the side of the second V-shaped guide wheel assembly away from the box;

[0008] The winding drum system includes a winding drum body and a U-shaped frame, U-shaped grooves are respectively provided at both ends of the U-shaped frame, bearings are respectively sleeved and connected at both ends of the winding drum body, and the bearings are located in the corresponding U-shaped grooves. One end of the winding drum body is sleeved and connected to a driven gear, and a driving gear is provided on one side of the driven gear. It also includes a servo motor and a linear drive assembly that drives the servo motor to move horizontally, and the driving gear is sleeved on the output shaft of the servo motor.

[0009] By adopting the above technical solution, when in use, the polyester DTY yarn is wound through the threading hole, the polyester DTY yarn is wound around the two first V-shaped guide wheel assemblies, the swinging tensioning wheel assembly is located above the polyester DTY yarn and is rollingly connected thereto, and the polyester DTY yarn after passing through the threading hole is wound around the second V-shaped guide wheel assembly, and then the polyester DTY yarn is wound around the winding cylinder, and the linear drive assembly drives the driving gear on the servo motor to engage with the driven gear, and the servo motor drives the driving gear to rotate, and the driving gear drives the winding cylinder to rotate through the driven gear, thereby winding the polyester DTY yarn. At the same time, the hot air supply assembly generates more hot air that enters the inner cavity of the V-shaped blowing head assembly, and the V-shaped blowing head assembly then blows the hot air on the polyester DTY yarn. , the polyester DTY yarn is heated. Since the polyester DTY yarn is subjected to the traction force of the winding cylinder and the tensioning force of the swinging tensioning wheel assembly, the drafting and heat setting effect of the polyester DTY yarn is achieved. When heat setting polyester DTY yarns of different diameters, the tensioning force of the swinging tensioning wheel assembly on the polyester DTY yarn can be adjusted, thereby reducing the probability of large changes in the diameter of the polyester DTY yarn due to drafting and heat setting, thereby enhancing the quality of the product. When the winding cylinder has wound an appropriate amount of polyester DTY yarn and needs to be disassembled, the driving gear and the driven gear on the servo motor of the linear drive assembly are separated, and a special tool is used to move the winding cylinder upward to separate the winding cylinder from the U-shaped frame to achieve the purpose of disassembly, reducing the difficulty of operation and improving work efficiency.

[0010] In a preferred example, the present invention can be further configured as follows: the first V-shaped guide wheel assembly includes a first V-shaped wheel and a support shaft passing through the inner hole thereof, and both ends of the support shaft are respectively passed through the side walls of the box and are rotatably connected thereto.

[0011] By adopting the above technical solution, the polyester DTY yarn is located in the V-shaped groove of the first V-shaped wheel, and the first V-shaped wheel guides the moving direction of the polyester DTY yarn.

[0012] In a preferred example, the present invention can be further configured as follows: the swing-type tensioning wheel assembly includes an inclined swing rod and a longitudinal axis passing through one end of the swing rod, the swing rod is provided with a U-shaped mounting cavity at one end away from the longitudinal axis, a V-shaped tensioning wheel is rotatably connected in the U-shaped mounting cavity, the upper inclined surface of the swing rod is provided with fixed grooves at intervals, U-shaped counterweight blocks are respectively clamped in the fixed grooves, and the two ends of the longitudinal axis are respectively passed through the side walls of the box and are rotatably connected thereto.

[0013] By adopting the above technical solution, since the longitudinal axis is rotatably connected to the side wall of the box, the V-shaped tensioning wheel presses on the polyester DTY yarn, and the polyester DTY yarn is tensioned under the action of the gravity of the U-shaped counterweight block, the swing rod and the V-shaped tensioning wheel. By adjusting the number of fixed U-shaped counterweight blocks on the swing rod, the tensioning force of the V-shaped tensioning wheel on the polyester DTY yarn can be adjusted. The structure is simple and the operation is convenient.

[0014] In a preferred example, the present invention can be further configured as follows: the V-shaped blower head assembly includes a V-shaped hollow shell, the inner surface of the V-shaped hollow shell is arranged in a V-shaped structure, a plurality of blowing holes are arranged at intervals on the inner surface of the V-shaped hollow shell, and a plurality of support rods are connected to the lower surface of the V-shaped hollow shell at intervals, and the lower ends of the support rods are connected to the bottom of the box body.

[0015] By adopting the above technical solution, the hot air supply component generates more hot air that enters the V-shaped hollow shell. The hot air in the V-shaped hollow shell is blown toward the polyester DTY yarn through the blowing holes, thereby uniformly heating the polyester DTY yarn.

[0016] In a preferred example, the present invention can be further configured as follows: the hot air supply component includes a rectangular shell and an exhaust fan, the inner cavity of the rectangular shell is connected to an electric heating rod, the top of the rectangular shell is connected to an air inlet pipe, the side of the rectangular shell is connected to an air outlet pipe, the air inlet and the air outlet pipe of the exhaust fan are connected by a pipe, and the air outlet of the exhaust fan is connected to the V-shaped blowing head assembly by a pipe.

[0017] By adopting the above technical solution, the electric heating rod generates a lot of heat after being connected to an external power supply. The exhaust fan extracts the heat in the rectangular shell to form hot air which enters the V-shaped blowing head assembly. The V-shaped blowing head assembly blows the hot air toward the polyester DTY yarn. Part of the heat in the hot air is taken away by the polyester DTY yarn, and part of the heat flows out through the yarn threading hole. The electric heating rod continues to work to replenish the lost heat.

[0018] In a preferred example, the present invention can be further configured as follows: the linear drive assembly includes a horizontal plate and two guide rails connected to the upper plane thereof at intervals, a movable plate is connected between the guide rails, the horizontal plate is connected to the U-shaped frame, a vertical plate is connected to the horizontal plate, an electric push rod is installed on the vertical plate, and the protruding end of the electric push rod is connected to the movable plate.

[0019] By adopting the above technical solution, the telescopic rod of the electric push rod extends and retracts, thereby driving the moving plate and the servo motor to move horizontally.

[0020] In a preferred example, the present invention can be further configured as follows: two U-shaped blocking rods are connected to the inner wall of the U-shaped groove at intervals, which are suitable for preventing the bearing from falling out of the U-shaped groove.

[0021] By adopting the above technical solution, the U-shaped stop rod plays a role of axially limiting the bearing, preventing the bearing from escaping from the inner cavity of the U-shaped groove.

[0022] In a preferred example, the present invention can be further configured as follows: the second V-shaped guide wheel assembly includes a second V-shaped wheel and a strip-shaped fixing seat rotatably connected to both ends thereof, and one end of the strip-shaped fixing seat is connected to the box body.

[0023] By adopting the above technical solution and using the second V-shaped wheel, the transmission direction of the polyester DTY yarn can be changed, making it easier for the winding drum to wind the polyester DTY yarn.

[0024] In summary, the present invention has at least one of the following beneficial technical effects:

[0025] 1. When heat setting polyester DTY yarns of different diameters, the tension of the swing tensioning wheel assembly on the polyester DTY yarn can be adjusted, thereby reducing the probability of large changes in the diameter of the polyester DTY yarn due to stretching and heat setting, thereby enhancing the quality of the product.

[0026] 2. When the winding drum has wound an appropriate amount of polyester DTY yarn and needs to be disassembled, operate the linear drive assembly to separate the driving gear and the driven gear on the servo motor, and use special tools to move the winding drum upward to separate the winding drum from the U-shaped frame to achieve the purpose of disassembly, reduce the difficulty of operation, and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0028] Figure 1 The utility model is a structural schematic diagram of a preferred embodiment of a stretching and heat-setting device for polyester DTY yarn.

[0029] Figure 2 yes Figure 1 Schematic diagram of the structure of the V-shaped hollow shell.

[0030] Figure 3 yes Figure 1 Schematic diagram of the structure of the take-up reel system.

[0031] Figure 4 yes Figure 1 Schematic diagram of the structure of the mid-swing tensioner assembly.

[0032] In the figure: 1, box body; 20, first V-shaped guide wheel assembly; 30, swing-type tensioning wheel assembly; 40, V-shaped blowing head assembly; 50, hot air supply assembly; 60, second V-shaped guide wheel assembly; 70, take-up drum system; 11, threading hole; 12, U-shaped stop bar;

[0033] 21. First V-shaped wheel; 22. Support shaft;

[0034] 31. Swing rod; 32. Longitudinal axis; 33. U-shaped mounting cavity; 34. V-shaped tension pulley; 35. Fixing groove; 36. U-shaped counterweight;

[0035] 41. V-shaped hollow shell; 42. Blowing hole; 43. Support rod;

[0036] 51. Rectangular housing; 52. Exhaust fan; 53. Electric heating rod; 54. Air inlet pipe; 55. Air outlet pipe;

[0037] 61. Second V-shaped wheel; 62. Bar-shaped fixing seat;

[0038] 71. Winding cylinder; 72. U-shaped frame; 73. U-shaped groove; 74. Bearing; 75. Driven gear; 76. Driving gear; 77. Servo motor; 78. Linear drive assembly; 781. Horizontal plate; 782. Guide rail; 783. Moving plate; 784. Vertical plate; 785. Electric push rod. DETAILED DESCRIPTION

[0039] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0040] It should be noted that these drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0041] Reference Figures 1 to 4 The present invention discloses a stretching and heat-setting device for polyester DTY yarn, comprising: a box body 1 and yarn threading holes 11 respectively arranged at both ends thereof; the inner cavity of the box body 1 is rotatably connected to two first V-shaped guide wheel assemblies 20 at intervals; the first V-shaped guide wheel assembly 20 comprises a first V-shaped wheel 21 and a support shaft 22 passing through the inner hole thereof; the two ends of the support shaft 22 are respectively passed through the side wall of the box body 1 and rotatably connected thereto; the polyester DTY yarn is located in the V-shaped groove of the first V-shaped wheel 21, and the first V-shaped wheel 21 guides the moving direction of the polyester DTY yarn.

[0042] The two first V-shaped guide wheel assemblies 20 are rotatably connected with a swing tensioning wheel assembly 30 with adjustable tensioning force; the swing tensioning wheel assembly 30 includes an inclined swing rod 31 and a longitudinal axis 32 passing through one end of the swing rod 31, and the end of the swing rod 31 away from the longitudinal axis 32 is provided with a U-shaped mounting cavity 33, and a V-shaped tensioning wheel 34 is rotatably connected in the U-shaped mounting cavity 33, and the upper inclined surface of the swing rod 31 is provided with fixed grooves 35 at intervals, and U-shaped The counterweight 36 and both ends of the longitudinal axis 32 are respectively provided through the side wall of the box body 1 and are rotatably connected thereto; since the longitudinal axis 32 is rotatably connected to the side wall of the box body 1, the V-shaped tensioning wheel 34 presses on the polyester DTY yarn, and the polyester DTY yarn is tensioned under the action of the gravity of the U-shaped counterweight 36, the swing rod 31 and the V-shaped tensioning wheel 34. By adjusting the number of U-shaped counterweights 36 fixed on the swing rod 31, the tensioning force of the V-shaped tensioning wheel 34 on the polyester DTY yarn can be adjusted. The structure is simple and the operation is convenient.

[0043] A V-shaped blowing head assembly 40 is provided below the swinging tensioning wheel assembly 30, and also includes a hot air supply assembly 50 connected to the inner cavity of the V-shaped blowing head assembly 40; the V-shaped blowing head assembly 40 includes a V-shaped hollow shell 41, the inner surface of the V-shaped hollow shell 41 is arranged in a V-shaped structure, and a plurality of blowing holes 42 are provided at intervals on the inner surface of the V-shaped hollow shell 41, and a plurality of support rods 43 are connected at intervals on the lower surface of the V-shaped hollow shell 41, and the lower ends of the support rods 43 are connected to the bottom of the box body 1; the hot air supply assembly 50 generates a large amount of hot air entering the V-shaped hollow shell 41 during operation, and the hot air in the V-shaped hollow shell 41 is blown toward the polyester DTY yarn through the blowing holes 42, thereby evenly heating the polyester DTY yarn.

[0044] The hot air supply component 50 includes a rectangular shell 51 and an exhaust fan 52. The inner cavity of the rectangular shell 51 is connected to an electric heating rod 53, the top of the rectangular shell 51 is connected to an air inlet pipe 54, and the side of the rectangular shell 51 is connected to an air outlet pipe 55. The air inlet of the exhaust fan 52 and the air outlet pipe 55 are connected by a pipe, and the air outlet of the exhaust fan 52 and the V-shaped blowing head assembly 40 are connected by a pipe; the electric heating rod 53 generates a lot of heat after being connected to an external power supply. The exhaust fan 52 extracts the heat in the rectangular shell 51 to form hot air that enters the V-shaped blowing head assembly 40. The V-shaped blowing head assembly 40 blows the hot air toward the polyester DTY yarn. Part of the heat in the hot air is taken away by the polyester DTY yarn, and part of the heat flows out through the yarn threading hole 11. The electric heating rod 53 continues to work to replenish the lost heat.

[0045] A second V-shaped guide wheel assembly 60 is connected to the left side of the box body 1. The second V-shaped guide wheel assembly 60 includes a second V-shaped wheel 61 and a strip fixing seat 62 rotatably connected to both ends thereof, and one end of the strip fixing seat 62 is connected to the box body 1; by using the second V-shaped wheel 61, the transmission direction of the polyester DTY yarn can be changed, which facilitates the winding drum 71 to wind the polyester DTY yarn.

[0046] A winding drum system 70 is provided at an angled lower side of the second V-shaped guide wheel assembly 60 away from the box body 1; the winding drum system 70 includes a winding drum body 71 and a U-shaped frame 72, and U-shaped grooves 73 are respectively provided at both ends of the U-shaped frame 72. Bearings 74 are respectively installed at both ends of the winding drum body 71, and the bearings 74 are located in the corresponding U-shaped grooves 73. One end of the winding drum body 71 is installed with a driven gear 75, and a driving gear 76 is provided on one side of the driven gear 75. It also includes a servo motor 77 and a linear drive assembly 78 that drives the servo motor 77 to move horizontally, and the driving gear 76 is installed on the output shaft of the servo motor 77.

[0047] The linear drive assembly 78 includes a horizontal plate 781 and two guide rails 782 connected to the upper plane thereof at intervals, a movable plate 783 is connected between the guide rails 782, the horizontal plate 781 is connected to the U-shaped frame 72, a vertical plate 784 is connected to the horizontal plate 781, an electric push rod 785 is installed on the vertical plate 784, and the protruding end of the electric push rod 785 is connected to the movable plate 783; the telescopic rod of the electric push rod 785 extends and retracts, thereby driving the movable plate 783 and the servo motor 77 to move horizontally.

[0048] Two U-shaped blocking rods 12 are connected to the inner wall of the U-shaped groove 73 at intervals, suitable for preventing the bearing 74 from escaping from the U-shaped groove 73 ; the U-shaped blocking rods 12 serve as an axial limit for the bearing 74 , preventing the bearing 74 from escaping from the inner cavity of the U-shaped groove 73 .

[0049] The implementation principle of this embodiment is as follows: when in use, the polyester DTY yarn is wound through the threading hole 11, the polyester DTY yarn is wound on the two first V-shaped guide wheel assemblies 20, the swing type tensioning wheel assembly 30 is located above the polyester DTY yarn and is connected with it in a rolling manner, and the polyester DTY yarn after passing through the threading hole 11 is wound on the second V-shaped guide wheel assembly 60, and then the polyester DTY yarn is wound on the winding cylinder 71, and the linear drive assembly 78 drives the driving gear 76 on the servo motor 77 to mesh with the driven gear 75, and the servo motor 77 drives the driving gear 76 to rotate, and the driving gear 76 drives the winding cylinder 71 to rotate through the driven gear 75, thereby winding the polyester DTY yarn. At the same time, the hot air supply assembly 50 generates more hot air entering the inner cavity of the V-shaped blowing head assembly 40, and the V-shaped blowing head assembly 40 blows the hot air on the polyester DTY yarn to heat the polyester DTY yarn. The traction force and the tensioning force of the swinging tensioning wheel assembly 30 achieve the stretching and heat setting effect on the polyester DTY yarn. When heat setting polyester DTY yarns of different diameters, the tensioning force of the swinging tensioning wheel assembly 30 on the polyester DTY yarn can be adjusted, thereby reducing the probability of a large change in the diameter of the polyester DTY yarn due to stretching and heat setting, thereby enhancing the quality of the product. When the winding drum 71 has wound an appropriate amount of polyester DTY yarn and needs to be disassembled, the linear drive assembly 78 is operated to drive the driving gear 76 and the driven gear 75 on the servo motor 77 to separate, and a special tool is used to move the winding drum 71 upward, so that the winding drum 71 is separated from the U-shaped frame 72 to achieve the purpose of disassembly, reducing the difficulty of operation and improving work efficiency. When multiple winding drums 71 are needed to alternately wind the polyester DTY yarn, bearings 74 are respectively installed at both ends of each winding drum 71, and one end of the winding drum 71 is connected to a driven gear 75.

[0050] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A drafting and heat-setting device for polyester DTY yarn, comprising: The box body (1) and the threading holes (11) respectively arranged at both ends thereof are characterized in that the inner cavity of the box body (1) is rotatably connected to two first V-shaped guide wheel assemblies (20), and a swing-type tensioning wheel assembly (30) with adjustable tensioning force is rotatably connected between the two first V-shaped guide wheel assemblies (20); A V-shaped blowing head assembly (40) is provided below the swing-type tension wheel assembly (30), and also includes a hot air supply assembly (50) communicated with the inner cavity of the V-shaped blowing head assembly (40); A second V-shaped guide wheel assembly (60) is connected to the left side of the box body (1), and a winding drum system (70) is provided obliquely below the side of the second V-shaped guide wheel assembly (60) away from the box body (1); The winding drum system (70) comprises a winding drum body (71) and a U-shaped frame (72), wherein both ends of the U-shaped frame (72) are respectively provided with U-shaped grooves (73), and both ends of the winding drum body (71) are respectively sleeved and connected with bearings (74), and the bearings (74) are located in the corresponding U-shaped grooves (73). One end of the winding drum body (71) is sleeved and connected with a driven gear (75), and one side of the driven gear (75) is provided with a driving gear (76). The winding drum system (70) further comprises a servo motor (77) and a linear drive assembly (78) for driving the servo motor (77) to move horizontally, and the driving gear (76) is sleeved on the output shaft of the servo motor (77).

2. The polyester DTY yarn drawing and heat setting device according to claim 1, characterized in that: The first V-shaped guide wheel assembly (20) comprises a first V-shaped wheel (21) and a support shaft (22) passing through an inner hole thereof, wherein both ends of the support shaft (22) pass through the side walls of the box body (1) and are rotatably connected thereto.

3. The polyester DTY yarn drawing and heat setting device according to claim 1, characterized in that: The swing type tensioning wheel assembly (30) comprises an obliquely arranged swing rod (31) and a longitudinal axis (32) passing through one end of the swing rod (31); a U-shaped mounting cavity (33) is provided at one end of the swing rod (31) away from the longitudinal axis (32); a V-shaped tensioning wheel (34) is rotatably connected in the U-shaped mounting cavity (33); fixing grooves (35) are provided at intervals on the upper inclined surface of the swing rod (31); U-shaped counterweight blocks (36) are respectively clamped in the fixing grooves (35); and both ends of the longitudinal axis (32) are respectively passed through the side walls of the box body (1) and are rotatably connected thereto.

4. The stretching and heat setting device for polyester DTY yarn according to claim 1, characterized in that: The V-shaped blowing head assembly (40) includes a V-shaped hollow shell (41), the inner surface of the V-shaped hollow shell (41) is arranged in a V-shaped structure, the inner surface of the V-shaped hollow shell (41) is provided with a plurality of blowing holes (42) at intervals, and the lower surface of the V-shaped hollow shell (41) is connected to a plurality of support rods (43) at intervals, and the lower ends of the support rods (43) are connected to the bottom of the box body (1).

5. The polyester DTY yarn drawing and heat setting device according to claim 1, characterized in that: The hot air supply assembly (50) comprises a rectangular shell (51) and an exhaust fan (52), the inner cavity of the rectangular shell (51) is connected to an electric heating rod (53), the top of the rectangular shell (51) is connected to an air inlet pipe (54), the side of the rectangular shell (51) is connected to an air outlet pipe (55), the air inlet of the exhaust fan (52) and the air outlet pipe (55) are connected via a pipeline, and the air outlet of the exhaust fan (52) and the V-shaped blowing head assembly (40) are connected via a pipeline.

6. The stretching and heat setting device for polyester DTY yarn according to claim 1, characterized in that: The linear drive assembly (78) includes a horizontal plate (781) and two guide rails (782) connected to the upper plane thereof at intervals, a movable plate (783) is connected between the guide rails (782), the horizontal plate (781) is connected to the U-shaped frame (72), a vertical plate (784) is connected to the horizontal plate (781), an electric push rod (785) is installed on the vertical plate (784), and the protruding end of the electric push rod (785) is connected to the movable plate (783).

7. The stretching and heat setting device for polyester DTY yarn according to claim 1, characterized in that: Two U-shaped blocking rods (12) are connected to the inner wall of the U-shaped groove (73) at intervals, and are suitable for blocking the bearing (74) from escaping from the U-shaped groove (73).

8. The polyester DTY yarn drawing and heat setting device according to claim 1, characterized in that: The second V-shaped guide wheel assembly (60) comprises a second V-shaped wheel (61) and a strip-shaped fixing seat (62) rotatably connected to both ends of the second V-shaped wheel. One end of the strip-shaped fixing seat (62) is connected to the box body (1).

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