A stenter setting machine

Abstract

The present invention discloses a stenter setting machine, comprising a plurality of ovens distributed along the conveying direction of fabrics, a main exhaust pipe parallel to the conveying direction of fabrics, a plurality of drying devices respectively arranged in the ovens and a plurality of heat recovery devices respectively arranged in the ovens; a pair of corresponding side walls of the ovens are formed with inlet and outlet holes for fabrics to pass horizontally; the fabrics pass through all the ovens in sequence; the main exhaust pipe is arranged above the ovens; one end of the main exhaust pipe is formed with a plurality of first exhaust pipes distributed along its axial direction, and the other end is formed with a plurality of second exhaust pipes distributed along its axial direction; the first exhaust pipe and the second exhaust pipe correspond to the ovens one by one and are respectively connected to the ovens; the first exhaust pipe, the second exhaust pipe and the main exhaust pipe are used to discharge gas containing moisture from the ovens to reduce the generation of condensed water; the drying device is used to dry the fabrics; and the heat recovery device is used to recover the residual heat in the airflow passing through the fabrics. The present invention greatly reduces the waste of heat.

Description

Technical Field

[0001] The invention relates to the field of tentering and setting machines, in particular to a tentering and setting machine. Background Art

[0002] The stenter setting machine is a device used for stretching and setting fabrics, which mainly includes a feeding part, a weft straightener, a chain, a drying oven and a cloth dropping and winding device; the fabric passes through the feeding part, the weft straightener, the chain, the drying oven and the cloth dropping and winding device in sequence; the drying oven drives the air circulation through the circulating fan, and a heat exchanger is used to heat the air during the air circulation process, and then the hot air is sprayed out through the nozzles on the upper and lower sides of the fabric to dry the fabric, so that the temperature of the hot water is reduced, the humidity is increased, and finally it is discharged from the exhaust pipe on the top of the box.

[0003] With respect to the above-mentioned related technologies, the inventors believe that there are the following defects: after the hot air passes through the fabric, the temperature decreases, but it still has a certain amount of heat, which is then directly discharged from the exhaust pipe, so that the heat cannot be fully utilized, resulting in a waste of resources. Summary of the invention

[0004] In order to reduce the technical problem of heat waste, the present invention provides a stentering setting machine.

[0005] The present invention provides a stenter setting machine adopting the following technical solution:

[0006] A stenter setting machine, comprising a plurality of ovens distributed along a fabric conveying direction, a main exhaust pipe parallel to the fabric conveying direction and a plurality of drying devices respectively arranged in the ovens; the fabric passes through all the ovens in sequence; the main exhaust pipe is arranged above the ovens and is provided with a plurality of first exhaust pipes distributed along the axial direction of the main exhaust pipe; the first exhaust pipe corresponds to the ovens one by one and the two are connected; an L-shaped air flow channel is arranged in the oven; a heat exchanger is arranged in the middle of the air flow channel and a circulating centrifugal fan is arranged at the end; the drying device is arranged on the outside of the air flow channel and comprises a drying mechanism connected to the air outlet of the circulating centrifugal fan; the drying mechanism comprises a pair of drying nozzle assemblies respectively arranged on the upper and lower sides of the fabric; and a heat recovery device is also included; the heat recovery device comprises a heat exchange pipe arranged in the inlet end of the air flow channel and a pair of air suction assemblies respectively arranged on the upper and lower sides of the fabric; the drying nozzle assembly and the air suction assembly face the fabric; the heat exchange pipe and the air suction assembly are connected through a recovery air pipe; the upper end of the heat exchange pipe is connected to the first exhaust pipe.

[0007] By adopting the above technical solution, after the hot air passes through the fabric for drying, it is entered by the air suction component, and the air suction component enters the heat exchange tube through the recovery air pipe, and then is discharged through the first exhaust pipe. During this process, the heat exchange tube will be heated by the residual heat in the airflow, and the heat exchange tube will preheat the cold air entering the airflow channel, so that the heat in the airflow after drying the fabric can be used to heat the cold air, which greatly reduces the waste of heat.

[0008] Optionally, the drying nozzle assembly includes a plurality of drying nozzles evenly distributed along the conveying direction of the fabric; the length of the drying nozzle is greater than the width of the fabric; and the drying nozzles on the upper and lower sides of the fabric are spaced apart along the conveying direction of the fabric.

[0009] By adopting the above technical solution, the drying nozzles on the upper and lower sides of the fabric are staggered, so that the hot air sprayed from the drying nozzles can completely penetrate the fabric, thereby improving the drying efficiency of the fabric.

[0010] Optionally, the suction assembly includes a plurality of suction nozzles evenly distributed along the conveying direction of the fabric; the length of the suction nozzle is greater than the width of the fabric; and the suction nozzle is located between a pair of adjacent drying nozzles.

[0011] By adopting the above technical solution, the suction nozzle is directly opposite to the drying nozzle, and the hot air sprayed from the drying nozzle will be directly sucked into the suction nozzle after penetrating the fabric, and then directly enter the heat exchange tube, which greatly reduces the heat loss.

[0012] Optionally, there are multiple recovery air pipes; the recovery air pipes correspond to the air suction nozzles one by one; one end of the recovery air pipe is connected to the end of the air suction nozzle away from the fabric, and the other end is connected to the heat exchange pipe.

[0013] By adopting the above technical solution, the air outlets of the recovery air pipe are respectively connected to different positions of the heat exchange pipe, so that the heat exchange pipe absorbs heat evenly, thereby increasing the heat exchange area between the heat exchange pipe and the cold air entering the air flow channel, and the heat can be fully utilized.

[0014] Optionally, the drying mechanism also includes a distribution seat; a pair of drying nozzle assemblies are arranged on the end surface of the distribution seat close to the fabric; a rectangular distribution groove is formed in the distribution seat; a pair of air outlet grooves distributed up and down are formed on the side wall of the distribution groove close to the fabric; the drying nozzle assembly is connected to the distribution groove through the air outlet groove; the air outlet of the circulating centrifugal fan is connected to an air flow inlet pipe; the other end of the air flow inlet pipe is vertically connected to the middle of the end surface of the distribution seat away from the fabric and is connected to the distribution groove; a pair of the air outlet grooves are symmetrically distributed up and down relative to the connection between the air flow inlet pipe and the distribution seat.

[0015] By adopting the above technical solution, after the air flow enters the distribution groove from the air inlet pipe, it enters a pair of air outlet grooves through the same distance, which is conducive to the uniform distribution of hot air, thereby avoiding different temperatures of hot air sprayed from a pair of drying nozzle assemblies and avoiding temperature differences between the upper and lower surfaces of the fabric.

[0016] Optionally, a guide block in the shape of an isosceles triangle is formed in the middle of the side wall of the distribution groove close to the airflow inlet pipe; the sharp corner of the guide block faces the connection between the airflow inlet pipe and the distribution seat.

[0017] By adopting the above technical solution, the isosceles triangle-shaped guide block reduces the path length of the hot air and distributes it effectively and evenly.

[0018] Optionally, a vertical adjustment component is provided in the oven; the vertical adjustment component is used to adjust a pair of drying nozzle components to synchronously move away from or closer to the fabric.

[0019] By adopting the above technical solution, the distance between a pair of drying nozzle assemblies and the fabric can be changed through the vertical adjustment component, so as to effectively control the utilization of heat and improve the drying quality.

[0020] Optionally, a vertical guide groove is formed on the side wall of the airflow channel near the end face of a pair of drying nozzle assemblies; a vertical slider that cooperates with the vertical guide groove is formed on the drying nozzle assembly; the vertical adjustment assembly includes a vertical drive screw pivotally connected between the upper and lower side walls of the vertical guide groove; the part of the vertical drive screw located in the vertical guide groove is formed with a pair of external threaded portions with opposite rotation directions; a pair of vertical sliders of the drying nozzle assemblies are respectively screwed on different external threaded portions of the vertical drive screw; the upper end of the vertical drive screw vertically passes through the upper side wall of the oven and is formed with a regular hexagonal vertical drive block.

[0021] By adopting the above technical solution, the vertical drive screw can be driven to rotate by twisting the hexagonal vertical drive block outside the oven, thereby driving a pair of vertical sliders to move closer or farther away synchronously along the vertical guide groove, that is, a pair of drying nozzle assemblies to move closer or farther away synchronously, which makes adjustment convenient.

[0022] Optionally, the heat exchange tube includes a heat exchange upper tube and a heat exchange lower tube; the heat exchange lower tube is a serpentine bend and is vertically arranged; the axial direction of the heat exchange upper tube is parallel to the conveying direction of the fabric; the two ends of the heat exchange lower tube are connected to the two ends of the heat exchange upper tube; the lower end of the first exhaust pipe is connected to the middle part of the heat exchange upper tube; the recovery air pipe is connected to the end face of the heat exchange lower tube close to the drying mechanism.

[0023] By adopting the above technical solution, the lower heat exchange tube is a serpentine curved tube, which is beneficial to increase the heat exchange area between the heat exchange tube and the cold air entering the air flow channel, and the heat can be fully utilized.

[0024] Optionally, a plurality of second exhaust pipes distributed along the axial direction of the main exhaust pipe are provided at one end of the main exhaust pipe away from the first exhaust pipe; the second exhaust pipes correspond to the ovens one by one and the two are connected.

[0025] By adopting the above technical solution, the presence of the second exhaust pipe is conducive to the discharge of gas containing moisture, thereby avoiding the formation of condensed water in the oven, which affects the drying efficiency of the fabric.

[0026] In summary, the beneficial effects of the present invention are:

[0027] 1. The heat in the airflow after drying the fabric will be used to heat the cold air, greatly reducing the waste of heat.

[0028] 2. It is beneficial to increase the heat exchange area between the heat exchange tube and the cold air entering the air flow channel, so that the heat can be fully utilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the front view of the present invention.

[0030] Figure 2 The present invention Figure 1 Schematic diagram of the structure of the cross section of AA.

[0031] Figure 3 The present invention Figure 2 Schematic diagram of the structure of the cross section of BB.

[0032] Figure 4 The present invention Figure 3 A schematic structural diagram of the cross section of the drying nozzle assembly 34 and the suction assembly.

[0033] Figure 5 It is a schematic diagram of the structure of the drying nozzle assembly 34 of the present invention from a top view.

[0034] Figure 6 The present invention Figure 2 A schematic structural diagram of the middle distribution seat 33.

[0035] Figure 7 It is a schematic diagram of the structure of the heat exchange tube 53 of the present invention.

[0036] Description of reference numerals:

[0037] 10. Oven; 100. Inlet and outlet holes; 101. Horizontal channel; 102. Vertical channel; 103. Air flow channel; 11. Horizontal partition; 12. Vertical partition; 120. Vertical guide groove; 13. Vertical connecting rod;

[0038] 20. Main exhaust pipe; 21. First exhaust pipe; 22. Second exhaust pipe;

[0039] 30. Drying device; 31. Circulating centrifugal fan; 32. Air inlet pipe; 33. Distribution seat; 330. Distribution slot; 331. Air outlet slot; 332. Vertical sliding slot; 333. Guide block; 334. Support foot; 34. Drying nozzle assembly; 341. Mobile support seat; 342. Drying nozzle; 3420. Hot air transmission slot; 3421. Hot air injection hole; 343. Drive connection seat; 344. Vertical slider; 35. Vertical drive screw; 36. Heat exchanger;

[0040] 40. Fabric;

[0041] 50. Heat recovery device; 51. Air suction nozzle; 510. Air suction chamber; 511. Horizontal support plate; 52. Air recovery pipe; 53. Heat exchange pipe; 531. Heat exchange lower pipe; 532. Heat exchange upper pipe. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-7 The present invention is described in further detail.

[0043] The present application discloses a tentering setting machine, referring to Figure 1-Figure 3 , including a plurality of ovens 10 distributed along the conveying direction of the fabric 40, a main exhaust pipe 20 parallel to the conveying direction of the fabric 40, a plurality of drying devices 30 respectively arranged in the ovens 10 and a plurality of heat recovery devices 50 respectively arranged in the ovens 10; a pair of corresponding side walls of the ovens 10 are formed with inlet and outlet holes 100 for the fabric to pass horizontally; the fabric 40 passes through all the ovens 10 in sequence; the main exhaust pipe 20 is arranged above the ovens 10; one end of the main exhaust pipe 20 is formed with a plurality of first exhaust pipes 21 distributed along its axial direction, and the other end is formed with a plurality of second exhaust pipes 22 distributed along its axial direction; the first exhaust pipe 21 and the second exhaust pipe 22 respectively correspond to the ovens 10 one by one and are respectively connected to the ovens 10; the first exhaust pipe 21, the second exhaust pipe 22 and the main exhaust pipe 20 are used to discharge the gas containing moisture from the oven 10 to reduce the generation of condensed water; the drying device 30 is used to dry the fabric; the heat recovery device 50 is used to recover the residual heat in the airflow passing through the fabric.

[0044] refer to Figure 2 and Figure 3A horizontal partition 11 is formed in the oven 10; a vertical partition 12 is formed at one end of the horizontal partition 11 close to the first exhaust pipe 21; a ventilation gap is arranged between the upper end of the vertical partition 12 and the upper side wall of the oven 10; an air flow channel 103 is formed between the horizontal partition 11 and the vertical partition 12 and the side wall of the oven 10; the air flow channel 103 includes a vertical channel 102 and a horizontal channel 101; a heat exchanger 36 is arranged at the bottom of the vertical channel 102; the heat exchanger 36 uses hot oil as the medium; a circulating centrifugal fan 31 is arranged at one end of the horizontal channel 101 away from the first exhaust pipe 21; the air outlet of the circulating centrifugal fan 31 is located on the upper side of the horizontal partition 11; the circulating centrifugal fan 31 is started to drive the air flow to enter from the ventilation gap, pass through the air flow channel 103, and finally be discharged from the air outlet of the circulating centrifugal fan 31.

[0045] refer to Figure 2-Figure 6 The drying device 30 includes a drying mechanism; the drying mechanism includes a distribution seat 33, a pair of drying nozzle assemblies 34 and a vertical adjustment assembly.

[0046] refer to Figure 5 and Figure 6 The distribution seat 33 is a rectangular parallelepiped; a plurality of support legs 334 are formed on the bottom surface of the distribution seat 33; the support legs 334 are fixed on the upper end surface of the horizontal partition 11; a rectangular distribution slot 330 is formed in the distribution seat 33; a pair of air outlet slots 331 distributed up and down are formed on the side wall of the distribution slot 330 close to the fabric 40; the drying nozzle assembly 34 is connected to the distribution slot 330 through the air outlet slot 331; the air outlet of the circulating centrifugal fan 31 is connected to the air inlet pipe 32; the other end of the air inlet pipe 32 is vertically connected to the In the middle of the end surface of the distribution seat 33 away from the fabric 40 and connected to the distribution groove 330; a pair of air outlet grooves 331 are symmetrically distributed up and down relative to the connection between the airflow inlet pipe 32 and the distribution seat 33; a T-shaped vertical sliding groove 332 with upper and lower openings is formed on the end surface of the distribution seat 33 away from the airflow inlet pipe 32; an isosceles triangle-shaped guide block 333 is formed in the middle of the side wall of the distribution groove 330 close to the airflow inlet pipe 32; the sharp corner of the guide block 333 is opposite to the connection between the airflow inlet pipe 32 and the distribution seat 33.

[0047] refer to Figure 2 , Figure 5 and Figure 6The drying nozzle assembly 34 includes a movable support seat 341; the end of the movable support seat 341 close to the distribution seat 33 is formed with a T-shaped structure that cooperates with the vertical sliding groove 332, and the end away from the distribution seat 33 is formed with a plurality of drying nozzles 342 evenly distributed along the conveying direction of the fabric 40; the movable support seat 341 is sealed and slidably arranged in the vertical sliding groove 332 and always blocks the air outlet groove 331 on the corresponding side; the length of the drying nozzle 342 is greater than the width of the fabric 40; the drying nozzles 342 on the upper and lower sides of the fabric 40 are distributed at intervals along the conveying direction of the fabric 40; a plurality of hot air conveying grooves 3420 are formed on the end surface of the movable support seat 341 close to the distribution seat 33; the hot air conveying grooves 3420 correspond one-to-one to the drying nozzles 342 and the hot air conveying grooves 3420 extend into the drying nozzles 342; a plurality of hot air injection holes 3421 are formed on the side wall of the hot air conveying groove 3420 close to the fabric 40.

[0048] refer to Figure 2 and Figure 5 A driving connection seat 343 is formed at one end of the upper or lower drying nozzle 342 away from the movable support seat 341; a plurality of vertical sliders 344 are formed on the end surface of the driving connection seat 343 away from the drying nozzle 342 and are evenly distributed along the conveying direction of the fabric 40; a vertical guide groove 120 for the vertical slider 344 is formed on the end surface of the vertical partition 12 close to the drying mechanism; the vertical adjustment component includes a vertical driving screw 35 pivotally connected between the upper and lower side walls of one of the vertical guide grooves 120; the upper and lower side walls of the remaining vertical guide grooves 120 A vertical guide column 121 is formed between the side walls; a vertical slider 344 is screwed onto the vertical drive screw 35 or vertically sleeved on the vertical guide column 121; the portion of the vertical drive screw 35 located in the vertical guide groove 120 is formed with a pair of external threaded portions with opposite rotation directions; a pair of vertical sliders 344 in the vertical guide groove 120 where the vertical drive screw 35 is located are respectively screwed onto different external threaded portions of the vertical drive screw 35; the upper end of the vertical drive screw 35 vertically passes through the upper side wall of the oven 10 and is formed with a regular hexagonal vertical drive block.

[0049] refer to Figure 2 and Figure 7The heat recovery device 50 includes a heat exchange tube 53 arranged in the vertical channel 102 and a pair of suction components respectively arranged on the upper and lower sides of the fabric 40; the suction component includes a horizontal support plate 511; a pair of horizontal support plates 511 have a plurality of vertical connecting rods 13 formed on their end surfaces away from each other; the other end of the vertical connecting rod 13 is fixed to the upper side wall of the oven 10 or the upper end surface of the horizontal partition 11; a pair of horizontal support plates 511 have a plurality of suction nozzles 51 uniformly distributed along the conveying direction of the fabric 40 formed on their end surfaces close to each other; the length of the suction nozzle 51 is greater than the width of the fabric 40; the suction nozzle 51 is located between a pair of adjacent drying nozzles 342; the suction nozzle 51 is a rectangular parallelepiped and close to the end of the fabric 40. A suction cavity 510 which is larger on the outside and smaller on the inside is formed on the surface; a number of recovery air pipes 52 are fixed on the horizontal support plate 511; the recovery air pipes 52 correspond to the suction nozzles 51 one by one and are connected to the suction cavity 510; the heat exchange pipe 53 includes an upper heat exchange pipe 532 and a lower heat exchange pipe 531; the lower heat exchange pipe 531 is a serpentine curved pipe and is vertically arranged; the axial direction of the upper heat exchange pipe 532 is parallel to the conveying direction of the fabric 40; the two ends of the lower heat exchange pipe 531 are connected to the two ends of the upper heat exchange pipe 532; the lower end of the first exhaust pipe 21 is connected to the middle of the upper heat exchange pipe 532; the recovery air pipe 52 passes horizontally through the vertical partition 12 and is connected to the end face of the lower heat exchange pipe 531 close to the drying mechanism.

[0050] The working principle of a stenter setting machine in this application is:

[0051] Under the action of the circulating centrifugal fan 31, the cold air advances along the vertical channel 102 and the horizontal channel 101, and in the process is heated into hot air by the heat exchanger 36, and then the hot air passes through the circulating centrifugal fan 31 and the air inlet pipe 32 into a pair of drying nozzle assemblies 34, and finally is ejected from the hot air injection hole 3421 to penetrate the fabric 40, so that the temperature of the hot air drops and at the same time takes away the moisture on the fabric 40, and then the wind with moisture is sucked in by the suction nozzle 51, and enters the heat exchange pipe 53 along the recovery air pipe 52, so that the heat exchange pipe 53 absorbs the heat in the wind, and finally the wind is discharged from the first exhaust pipe 21 out of the oven 10; since the heat exchange pipe 53 is located in the vertical channel 102, the cold air entering under the action of the circulating centrifugal fan 31 contacts with the heat exchange pipe 53 and is heated, so that the heat not used up in drying is used to heat the cold air, thereby reducing the waste of heat.

[0052] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stenter setting machine, comprising a plurality of ovens (10) distributed along a conveying direction of a fabric (40), a main exhaust pipe (20) parallel to the conveying direction of the fabric (40), and a plurality of drying devices (30) respectively arranged in the ovens (10); the fabric (40) passes through all the ovens (10) in sequence; the main exhaust pipe (20) is arranged above the ovens (10) and is provided with a plurality of first exhaust pipes (21) distributed along the axial direction of the main exhaust pipe (20); the first exhaust pipes (21) correspond to the ovens (10) one by one and the two are in communication; Features: The oven (10) is provided with an L-shaped air flow channel (103); a heat exchanger (36) is provided in the middle of the air flow channel (103), and a circulating centrifugal fan (31) is provided at the end; the drying device (30) is provided outside the air flow channel (103) and comprises a drying mechanism connected to the air outlet of the circulating centrifugal fan (31); the drying mechanism comprises a pair of drying nozzle assemblies (34) respectively arranged on the upper and lower sides of the fabric (40); and further comprises a heat recovery device (50); the heat recovery device (50) comprises a heat exchange pipe (53) arranged in the inlet end of the air flow channel (103) and a pair of air suction assemblies respectively arranged on the upper and lower sides of the fabric (40); the drying nozzle assembly (34) and the air suction assembly face the fabric (40); the heat exchange pipe (36) and the air suction assembly are connected via a recovery air pipe (52); the upper end of the heat exchange pipe (53) is communicated with the first exhaust pipe (21); The drying nozzle assembly (34) comprises a plurality of drying nozzles (342) uniformly distributed along the conveying direction of the fabric (40); the length of the drying nozzles (342) is greater than the width of the fabric (40); the drying nozzles (342) on the upper and lower sides of the fabric (40) are spaced apart along the conveying direction of the fabric (40); The air suction assembly comprises a plurality of air suction nozzles (51) evenly distributed along the conveying direction of the fabric (40); the length of the air suction nozzles (51) is greater than the width of the fabric (40); the air suction nozzles (51) are located between a pair of adjacent drying nozzles (342); There are a plurality of recovery air pipes (52); the recovery air pipes (52) correspond to the air suction nozzles (51) one by one; one end of the recovery air pipe (52) is connected to one end of the air suction nozzle (51) away from the fabric (40), and the other end is connected to the heat exchange pipe (53); The drying mechanism further comprises a distribution seat (33); a pair of drying nozzle assemblies (34) are arranged on an end surface of the distribution seat (33) close to the fabric (40); a rectangular distribution slot (330) is formed in the distribution seat (33); a pair of air outlet slots (331) distributed up and down are formed on the side wall of the distribution slot (330) close to the fabric (40); the drying nozzle assembly (34) is connected to the distribution slot (330) through the air outlet slot (331); the air outlet of the circulating centrifugal fan (31) is connected to an air inlet pipe (32); the other end of the air inlet pipe (32) is vertically connected to the middle of the end surface of the distribution seat (33) away from the fabric (40) and is connected to the distribution slot (330); the pair of air outlet slots (331) are symmetrically distributed up and down relative to the connection between the air inlet pipe (32) and the distribution seat (33); A guide block (333) in the shape of an isosceles triangle is formed in the middle of the side wall of the distribution groove (330) close to the airflow inlet pipe (32); the sharp corner of the guide block (333) faces the connection between the airflow inlet pipe (32) and the distribution seat (33); The heat exchange tube (53) comprises an upper heat exchange tube (532) and a lower heat exchange tube (531); the lower heat exchange tube (531) is a serpentine curved tube and is vertically arranged; the axial direction of the upper heat exchange tube (532) is parallel to the conveying direction of the fabric (40); the two ends of the lower heat exchange tube (531) are connected to the two ends of the upper heat exchange tube (532); the lower end of the first exhaust pipe (21) is connected to the middle of the upper heat exchange tube (532); and the recovery air pipe (52) is connected to the end face of the lower heat exchange tube (531) close to the drying mechanism.

2. A stentering machine according to claim 1, Features: A vertical adjustment component is provided in the oven (10); the vertical adjustment component is used to adjust a pair of drying nozzle components (34) to synchronously move away from or closer to the fabric (40).

3. A stentering machine according to claim 2, Features: A vertical guide groove (120) is formed on the end surface of the side wall of the air flow channel (103) near a pair of the drying nozzle assemblies (34); a vertical slider (344) cooperating with the vertical guide groove (120) is formed on the drying nozzle assembly (34); the vertical adjustment assembly includes a vertical drive screw (35) pivotally connected between the upper and lower side walls of the vertical guide groove (120); a portion of the vertical drive screw (35) located in the vertical guide groove (120) is formed with a pair of external threaded portions with opposite rotation directions; the vertical sliders (344) of the pair of the drying nozzle assemblies (34) are respectively screwed onto different external threaded portions of the vertical drive screw (35); the upper end of the vertical drive screw (35) vertically passes through the upper side wall of the oven (10) and is formed with a regular hexagonal vertical drive block.

4. A stentering machine according to claim 1, Features: A plurality of second exhaust pipes (22) distributed along the axial direction of the main exhaust pipe (20) are provided at one end of the main exhaust pipe (20) away from the first exhaust pipe (21); the second exhaust pipes (22) correspond to the ovens (10) one by one and the two are in communication.

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