Adjustable drafting channel structure and adjusting method thereof

Abstract

The invention relates to an adjustable drafting channel structure and an adjusting method thereof.The adjustable drafting channel structure comprises an upper supporting frame, a lower supporting frame and an end plate, the upper supporting frame and the lower supporting frame are arranged on the two sides of a drafting channel respectively, and the upper supporting frame is located above the lower supporting frame; an upper driving part and a sliding rail are arranged on the upper supporting frame; a left sliding block and a right sliding block are arranged on the sliding rail in a sliding mode, the left sliding block is connected with the left drafting part, and the right sliding block is connected with the right drafting part. An upper driving part is arranged on the upper supporting frame and connected with a left sliding block and a right sliding block through two upper moving rods respectively, a lower driving part is arranged on the lower supporting frame and connected with a left drafting part and a right drafting part through two lower moving rods respectively, end plates are arranged on the end faces of the two sides of the drafting channel respectively, and one side of each end plate is fixedly connected with the right drafting part. And the other side is attached to the left drafting part. The size of an upper opening and the size of a lower opening of the drafting channel can be adjusted within a limited range, and therefore the size of the drafting channel can meet the adjusting requirement of any change.

Description

Technical Field

[0001] The invention relates to the technical field of nonwoven fabrics, and more particularly to an adjustable drafting tunnel structure and an adjustment method thereof. Background Art

[0002] Spunbond nonwoven fabrics are a kind of fiber fabrics with special functions, which are produced by high molecular polymer materials through melt spinning, air drafting, fiber laying, consolidation and post-processing. They have the advantages of large output, wide application range and low price. In the production process of spunbond nonwoven fabrics, sometimes there is a need to adjust the shape of the drafting tunnel due to process requirements. At present, the existing drafting tunnels in China generally do not support online adjustment, and shutdown adjustment requires all or part of the terminal production, which affects production efficiency and increases production costs.

[0003] There is a comparative patent (patent number ZL202120904671.6) solution for drafting tunnel adjustment in China, but the patent technology has the following defects: 1. The adjustment mechanism of the comparative patent is set in the middle or lower middle part of the drafting tunnel. The adjustment effect is to achieve the fixed width of the drafting tunnel section at this end through the positioning part 6, and the tunnel section width is adjusted at the other end through the lever action of the adjustment mechanism. That is, the comparative patent can only adjust the width of one end of the tunnel when adjusting the tunnel width, which cannot fully meet the actual adjustment requirements, that is, it cannot arbitrarily adjust the size of the entire tunnel within a limited size range.

[0004] 2. In addition to the two end faces of the drafting tunnel being set as flow openings, the other four faces must ensure sealing. In the comparison patent, during the adjustment process, the fixed blocks 30 on the left drafting section 2 and the right drafting section 3 slide in the adjustment slide hole 50 of the lateral sealing plate 5. It can be seen that the fixed blocks are provided on both the left and right drafting sections, and during the adjustment process, they slide to varying degrees relative to the slide hole in the lateral sealing plate. According to the description of the patent, the fixed block is similar to a guiding function. Because the temperature of the internal circulating medium in the drafting tunnel is 17-35°C under working conditions, the temperature variation range is too large, and the difference in ambient temperature after shutdown varies more with the seasons, which can easily cause micro-deformation of the metal. The structure of the drafting tunnel and the lateral sealing plate is quite complicated. In the case of temperature changes, the risk of the structure getting stuck or even damaged is very high, and it cannot be well sealed.

[0005] In view of the above-mentioned industry status quo and the defects of the compared patent technology, how to provide a more reliable, fast and flexible drafting tunnel structure is the technical problem to be solved by this application. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention proposes an adjustable drafting corridor structure and an adjustment method thereof, and adjusts the widths of the upper and lower ends of the drafting corridor respectively through upper and lower driving parts.

[0007] According to the first aspect of the present invention, the present invention provides an adjustable drafting tunnel structure, and the technical solution is as follows: An adjustable drafting corridor structure includes a left drafting part and a right drafting part, a drafting corridor is formed between the left drafting part and the right drafting part, and is characterized in that it includes an upper support frame, a lower support frame and an end plate, the upper support frame and the lower support frame are respectively arranged on both sides of the drafting corridor, and the upper support frame is located above the lower support frame.

[0008] An upper driving part and a slide rail are arranged on the upper supporting frame.

[0009] The slide rail extends along the width direction of the drafting corridor, and a left slider and a right slider are slidably arranged on the slide rail. The left slider is connected to the left drafting part, and the right slider is connected to the right drafting part.

[0010] The upper driving part is connected to the left slider and the right slider respectively through two upper moving rods, and is used for driving the left drafting part to move along the width direction through the left slider, and driving the right drafting part to move along the width direction through the right slider.

[0011] A lower driving part is arranged on the lower supporting frame, and the lower driving part is respectively connected with the left stretching part and the right stretching part through two lower moving rods, and is used for respectively controlling the left stretching part and the right stretching part to move along the width direction.

[0012] The end plates are respectively arranged on the end faces of both sides of the drafting tunnel, one side of the end plate is fixedly connected to the right drafting part, and the other side is fitted with the left drafting part. The end plates are used to seal both sides of the drafting tunnel.

[0013] According to a second aspect of the present invention, a method for adjusting an adjustable drafting tunnel structure is provided, comprising the following steps: St10. When the stretching channel needs to be adjusted, the airbag is controlled to deflate.

[0014] St20, when it is determined that the airbag is deflated, the upper driving unit and the lower driving unit jointly control the movement of the left drafting unit and the right drafting unit.

[0015] St30, when it is determined that the movement of the left stretching section and the right stretching section is completed, the airbag is controlled to inflate.

[0016] In summary, the above technical solution has the following beneficial effects: the upper support frame of the present application is installed on the steel structure platform, as one of the supports for the drafting tunnel to be suspended on the steel structure platform, the upper support frame supports the left drafting part and the right drafting part through the slide rail, the left slider and the right slider, and the upper drive part and the lower drive part are respectively arranged at the upper and lower places on both sides of the drafting part, and the beneficial effects are: 1. The size of the upper and lower openings of the drafting tunnel can be adjusted within a limited range, instead of adjusting the lower opening of the drafting tunnel alone, so that the size of the drafting tunnel can meet the adjustment requirements of any changes. 2. During the change of the upper and lower openings of the drafting tunnel, the upper drive part controls the two upper moving rods to be equally extended and retracted, and the lower drive part controls the two lower moving rods to be equally extended and retracted, so as to realize the symmetrical movement of the left drafting part and the right drafting part relative to the center of the drafting tunnel, thereby ensuring that the drafting tunnel is always centered during the adjustment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of an exploded view of an adjustable drafting tunnel structure; Figure 2 It is a schematic diagram of an upper support frame of an adjustable drafting tunnel structure; Figure 3 It is a schematic diagram of a lower support frame of an adjustable drafting tunnel structure; Figure 4 It is a schematic diagram of a left drafting group plate and a right drafting group plate of an adjustable drafting tunnel structure; Figure 5 It is a schematic diagram of a positioning frame of an adjustable drafting tunnel structure; Figure 6 A schematic diagram of an airbag with an adjustable draft tunnel structure; Figure 7 The present invention is a schematic diagram of a flow chart of an adjustment method for an adjustable drafting tunnel structure.

[0018] 1. The left stretching part; 2. The right stretching part; 10. The upper support frame; 11. The upper driving part; 111. The upper moving rod; 112. The upper reducer; 12. The slide rail; 13. The left slider; 131. The left connecting hole; 14. The right slider; 141. The right connecting hole; 20. The lower support frame; 21. The lower driving part; 211. The lower moving rod; 212. The lower reducer; 22. The left sleeve; 23. The right sleeve; 30. The end plate; 40. The left stretching plate group; 41. The upper left support rod; 42. The lower left support rod; 43. The first sealing groove; 44. The sealing strip; 45. The second sealing groove; 46. The airbag; 47. The pressure sensor; 50. The right stretching plate group; 51. The upper right support rod; 52. The lower right support rod; 60. The support table; 61. The sealing pad; 62. The positioning frame; 63. The opening. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1-Figure 5 As shown, an adjustable drafting corridor structure includes a left drafting part 1 and a right drafting part 2, a drafting corridor is formed between the left drafting part 1 and the right drafting part 2, and includes an upper support frame 10, a lower support frame 20 and an end plate 30, the upper support frame 10 and the lower support frame 20 are respectively arranged on both sides of the drafting corridor, and the upper support frame 10 is located above the lower support frame 20; an upper driving part 11 and a slide rail 12 are arranged on the upper support frame 10; the slide rail 12 extends along the width direction of the drafting corridor, and a left slider 13 and a right slider 14 are slidably arranged on the slide rail 12, the left slider 13 is connected to the left drafting part 1, and the right slider 14 is connected to the right drafting part 2; the upper driving part 11 is connected to the left drafting part 1 by The two upper moving rods 111 are respectively connected to the left slider 13 and the right slider 14, and are used to drive the left stretching part 1 to move in the width direction through the left slider 13, and drive the right stretching part 2 to move in the width direction through the right slider 14; a lower driving part 21 is arranged on the lower support frame 20, and the lower driving part 21 is respectively connected to the left stretching part 1 and the right stretching part 2 through two lower moving rods 211, and is used to respectively control the left stretching part 1 and the right stretching part 2 to move in the width direction; end plates 30 are respectively arranged on the end faces of both sides of the stretching channel, one side of the end plate 30 is fixedly connected to the right stretching part 2, and the other side is in contact with the left stretching part 1, and the end plate 30 is used to seal both sides of the stretching channel.

[0021] The upper support frame 10 of the present application is installed on the steel structure platform, as one of the supports for the drafting tunnel to be suspended on the steel structure platform, the upper support frame 10 supports the left drafting section 1 and the right drafting section 2 through the slide rail 12, the left slider 13 and the right slider 14, and the upper driving section 11 and the lower driving section 21 are respectively arranged at the upper and lower places on both sides of the drafting section, and the beneficial effects are as follows: 1. The size of the upper and lower openings of the drafting tunnel can be adjusted within a limited range, rather than adjusting the lower opening of the drafting tunnel alone, so that the size of the drafting tunnel can meet the adjustment requirements of any changes. 2. During the change of the upper and lower openings of the drafting tunnel, the upper driving section 11 controls the two upper moving rods 111 to be equally extended and retracted, and the lower driving section 21 controls the two lower moving rods 211 to be equally extended and retracted, so that the left drafting section 1 and the right drafting section 2 can move symmetrically relative to the center of the drafting tunnel, thereby ensuring that the drafting tunnel is always centered during the adjustment process.

[0022] Specifically, the upper driving part 11 is any element that can drive the upper moving rod 111 to perform linear reciprocating motion, such as a motor, a cylinder, a piston and other elements, or the upper moving rod 111 can be electrically controlled to extend and retract, and the upper driving part 11 is a control power source, or the upper moving rod 111 has a thread, and the upper driving part 11 cooperates with the thread to control the movement of the upper moving rod 111. Similarly, the lower driving part 21 can be any element that can drive the lower moving rod 211 to perform linear reciprocating motion, such as a motor, a cylinder, a piston and other elements, or the lower moving rod 211 can be electrically controlled to extend and retract, and the lower driving part 21 is a control power source, or the lower moving rod 211 has a thread, and the lower driving part 21 cooperates with the thread to control the movement of the lower moving rod 211.

[0023] Specifically, the two upper moving rods 111 are located on both sides of the upper driving part 11 in the width direction, and are used to move along the width direction of the drafting channel. The two lower moving rods 211 are located on both sides of the lower driving part 21 in the width direction, and are used to move along the width direction of the drafting channel.

[0024] For example, when the upper driving part 11 and the lower driving part 21 are motors, they also include an upper reducer 112 and a lower reducer 212. The upper driving part 11 is connected to the two upper moving rods 111 through the upper reducer 112, and the lower driving part 21 is connected to the two lower moving rods 211 through the upper reducer 112.

[0025] The upper driving part 11 mainly drives the upper moving rod 111 on the upper reducer 112 to perform telescopic action according to the signal instruction. The lower driving part 21 mainly drives the lower moving rod 211 on the lower reducer 212 to perform telescopic action according to the signal instruction. Under the action of the upper driving part 11, the upper reducer 112, the two relatively arranged upper moving rods 111 can be extended or shortened by the same amount at the same time. Under the action of the lower reducer 212, the two relatively arranged lower moving rods 211 can be extended or shortened by the same amount at the same time.

[0026] Left drafting plate groups 40 are provided on both sides of the left drafting section 1, and right drafting plate groups 50 are provided on both sides of the right drafting section 2; one side of the end plate 30 is fixedly connected to the right drafting plate group 50, and the other side is fitted with the left drafting plate group 40; an upper left support rod 41 and a lower left support rod 42 are provided on the left drafting plate group 40, and the upper left support rod 41 is located above the lower left support rod 42, and an upper right support rod 51 and a lower right support rod 52 are provided on the right drafting plate group 50, and the upper right support rod 51 Located above the lower right support rod 52; a left connecting hole 131 is opened on the left sliding block, and the upper left support rod 41 is movably set in the left connecting hole 131; a right connecting hole 141 is opened on the right sliding block, and the upper right support rod 51 is movably set in the right connecting hole 141; the two lower moving rods 211 are respectively provided with a left ring 22 and a right ring 23, the lower left support rod 42 is movably set in the left ring 22, and the lower right support rod 52 is movably set in the right ring 23.

[0027] The upper left support rod 41 and the lower right support rod 41 are both perpendicular to the side surface of the left drafting section 1 , and the lower left support rod 42 and the lower right support rod 52 are both perpendicular to the side surface of the right drafting section 2 .

[0028] Correspondingly, the left connecting hole 131 and the right connecting hole 141 are both opened along the length direction of the drafting tunnel, so as to allow the left upper support rod 41 and the right upper support rod 51 to pass through. The through holes of the left collar 22 and the right collar 23 are also opened along the length direction of the drafting tunnel, so as to allow the left lower support rod 42 and the right lower support rod 52 to pass through. The two upper moving rods 111 are on the upper driving part 11 and are located on both sides of the width direction of the drafting tunnel. They drive the left drafting part 1 and the right drafting part 2 to move along the width direction through the slider, the upper moving rod 111, and the drafting group plate in sequence. The slider is connected to the upper moving rod 111 in the form of a connecting hole, allowing the left drafting part 1 and the right drafting part 2 to have a certain vibration offset in the length direction, thereby improving the structural stability. Similarly, the two lower moving rods 211 are on the lower driving part 21 and are located on both sides of the width direction of the stretching channel. They successively drive the left stretching part 1 and the right stretching part 2 to move in the width direction through the ring, the lower moving rod 211, and the stretching group plate. They are connected to the lower moving rod 211 in the form of a ring, allowing the left stretching part 1 and the right stretching part 2 to have a certain vibration offset in the length direction, thereby improving the structural stability.

[0029] The end plate 30 and the right drafting plate 50 are fixedly connected by bolts. Specifically, the right drafting plate 50 is provided with a plurality of threaded holes, and one side of the end plate 30 can be fixed to the side end surface of the right drafting plate 50 by bolt connection.

[0030] The left drafting plate group 40 is provided with a first sealing groove 43 along the height direction. A sealing strip 44 is provided in the first sealing groove 43 . The sealing strip 44 is located in the overlapping area of ​​the left drafting plate group 40 and the end plate 30 .

[0031] The drafting tunnel is for fibers to pass from top to bottom, and both sides of the drafting tunnel need to be sealed. In order to achieve the effect that both sides can be sealed after the width of the left drafting part 1 and the right drafting part 2 is adjusted, one side of the end plate 30 is fixedly connected with the right drafting group plate 50 by bolts to achieve sealing, and the other side is sealed in the form of being fitted with the left drafting group plate 40. In this way, when moving, the end plate 30 can fit the side sliding of the left drafting group plate 40. The first sealing groove 43 is opened from the top to the bottom of the left drafting group plate 40, and a sealing strip 44 is arranged inside, and at the overlapping area of ​​the end plate 30 and the left drafting part 1, so as to play a better sealing role. The whole process does not require shutdown. This sealing method is simple and practical, and there is no potential problem of metal jamming. The material of the sealing strip 44 can be rubber, felt, polymer plastic, etc.

[0032] The left drafting plate group 40 is provided with a second sealing groove 45 along the height direction. An airbag 46 is arranged in the second sealing groove 45 . The airbag 46 is located in the overlapping area of ​​the left drafting plate group 40 and the end plate 30 .

[0033] The sealing effect of the sealing strip 44 alone is poor, so the present invention provides a solution for sealing with an airbag 46. The second sealing groove 45 is opened from the uppermost to the lowermost part of the left front lift, and an airbag 46 is arranged inside, and at the overlapping area of ​​the end plate 30 and the left drafting group plate 40. When the width of the drafting tunnel needs to be changed, it is only necessary to deflate the airbag 46 without stopping the machine, and then adjust the left drafting group plate 40 and the right drafting group plate 50 to move symmetrically with each other through the upper drive unit 11 and the lower drive unit 21 to achieve the change of the drafting tunnel width. After the adjustment is in place, the airbag 46 is inflated again to complete the online adjustment of the drafting tunnel. This sealing method reduces the friction when the left drafting part 1 and the right drafting part 2 move, and the sealing effect is also better. The airbag 46 and the sealing strip 44 can be set together, that is, the first sealing groove 43 and the second sealing groove 45 are respectively opened on the left drafting group plate 40. The paths of the first sealing groove 43 and the second sealing groove 45 may not be vertically opened, and may be adapted to the drafting tunnel. The first sealing groove 43 and the second sealing groove 45 are arranged along the width direction on the left drafting group plate 40, and there is no restriction on which one is closer to the drafting tunnel, and there is no restriction on the number of the first sealing groove 43 and the second sealing groove 45. The airbag 46 is connected to an air pump for air supply.

[0034] like Figure 6 As shown, the contact surface between the airbag 46 and the end plate 30 is wavy, and the convexities and concavities of the wavy airbag 46 extend in the height direction. After being inflated, the wavy airbag 46 can form a multi-layer sealing structure with the end plate 30 in the width direction, so that the sealing effect is better.

[0035] The upper support frames 10 on both sides of the drafting tunnel respectively extend upward to form support platforms 60, and the two support platforms 60 are provided with sealing pads 61, and a positioning frame 62 is provided above the sealing pads 61; the sealing pads 61 and the positioning frame 62 are located above the drafting tunnel and fit with the left drafting part 1 and the right drafting part 2, and are used to cover the gaps above the left drafting group plate 40, the right drafting group plate 50 and the end plate 30. The sealing pads 61 and the positioning frame 62 have openings 63 at the upper opening of the drafting tunnel. The material of the sealing pad 61 can be rubber, felt, polymer plastic, etc.

[0036] like Figure 7 As shown, a method for adjusting an adjustable drafting tunnel structure includes the following steps: St10. When the stretching channel needs to be adjusted, the airbag 46 is controlled to be deflated.

[0037] St11, the air cylinder controls the airbag to open its air port, and the airbag automatically deflates; the internal air pressure is preset, and when the air cylinder is controlled to inflate, the air cylinder inflates the airbag until the internal air pressure of the airbag reaches the preset air pressure. The first judgment method is to judge whether the inflation is complete by the internal air pressure of the airbag, which realizes feedback on the internal air pressure of the airbag.

[0038] St12, a pressure sensor 47 is provided between the airbag 46 and the bottom of the second sealing groove 45, and the pressure sensor 47 is used to judge whether the airbag 46 has completed inflation and deflation; the deflation pressure value is preset, and when the pressure value of the pressure sensor 47 is judged to be less than the deflation pressure value, the deflation is judged to be completed; the inflation pressure value is preset, and when the pressure value of the pressure sensor 47 is judged to be greater than the inflation pressure value, the inflation is judged to be completed. Judging by the pressure sensor is the second judgment method, and the deflation pressure value and the inflation pressure value can be preset and adjusted manually. After the airbag 46 is inflated, it needs to collide with the end plate 30 to complete the sealing. Therefore, the pressure sensor 47 will generate pressure only after the airbag 46 and the end plate 30 collide. The greater the pressure detected by the pressure sensor 47, the better the sealing between the airbag 46 and the end plate 30.

[0039] St20, when it is determined that the deflation of the airbag 46 is complete, the upper driving unit 11 and the lower driving unit 21 are used to jointly control the movement of the left stretching unit 1 and the right stretching unit 2.

[0040] St30: When it is determined that the movement of the left stretching section 1 and the right stretching section 2 is completed, the airbag 46 is controlled to inflate.

[0041] The beneficial effects of this application are: 1. The sizes of the upper and lower openings of the drafting corridor can be adjusted within a limited range, instead of simply adjusting the lower opening of the drafting corridor, so that the size of the drafting corridor can meet any change in adjustment needs.

[0042] 2. During the change of the upper and lower openings of the drafting corridor, the upper driving part 11 controls the two upper moving rods 111 to be equally extended and retracted, and the lower driving part 21 controls the two lower moving rods 211 to be equally extended and retracted, so as to realize the symmetrical movement of the left drafting part 1 and the right drafting part 2 relative to the center of the drafting corridor, thereby ensuring that the drafting corridor is always centered during the adjustment process.

[0043] 3. One side of the end plate 30 is fixed on the right drafting group plate 50, and the other side seals the passage through the joint action of the airbag 46 and the sealing strip 44. When the passage size does not need to be adjusted, the airbag 46 is inflated to achieve static sealing of the passage; when the passage size needs to be adjusted, the airbag 46 is deflated, and then the upper and lower openings of the drafting passage are adjusted by driving, and the airbag 46 is inflated after reaching a reasonable size. The whole process does not require shutdown. This sealing method is simple and practical, and there is no potential problem such as metal jamming.

[0044] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An adjustable drafting corridor structure, comprising a left drafting portion (1) and a right drafting portion (2), wherein a drafting corridor is formed between the left drafting portion (1) and the right drafting portion (2), characterized in that: It comprises an upper support frame (10), a lower support frame (20) and an end plate (30), wherein the upper support frame (10) and the lower support frame (20) are respectively arranged on both sides of a drafting tunnel, and the upper support frame (10) is located above the lower support frame (20); The upper support frame (10) is provided with an upper driving part (11) and a slide rail (12); The slide rail (12) extends along the width direction of the drafting channel, and a left slider (13) and a right slider (14) are slidably arranged on the slide rail (12), the left slider (13) is connected to the left drafting part (1), and the right slider (14) is connected to the right drafting part (2); The upper driving part (11) is connected to the left slider (13) and the right slider (14) respectively through two upper moving rods (111), and is used to drive the left drafting part (1) to move along the width direction through the left slider (13), and to drive the right drafting part (2) to move along the width direction through the right slider (14); The lower support frame (20) is provided with a lower driving part (21), and the lower driving part (21) is respectively connected to the left drafting part (1) and the right drafting part (2) through two lower moving rods (211), and is used for respectively controlling the left drafting part (1) and the right drafting part (2) to move in the width direction; The end plates (30) are respectively arranged on the two side end surfaces of the drafting tunnel, one side of the end plate (30) is fixedly connected to the right drafting part (2), and the other side is in contact with the left drafting part (1). The end plates (30) are used to seal the two sides of the drafting tunnel.

2. The adjustable drafting tunnel structure according to claim 1, characterized in that: It also includes an upper reducer (112) and a lower reducer (212); the upper drive unit (11) is connected to the two upper moving rods (111) via the upper reducer (112); and the lower drive unit (21) is connected to the two lower moving rods (211) via the upper reducer (112).

3. The adjustable drafting tunnel structure according to claim 1, characterized in that: Left drafting plate groups (40) are arranged on both sides of the left drafting section (1), and right drafting plate groups (50) are arranged on both sides of the right drafting section (2); One side of the end plate (30) is fixedly connected to the right drafting group plate (50), and the other side is fitted with the left drafting group plate (40); The left drafting plate (40) is provided with an upper left support rod (41) and a lower left support rod (42), wherein the upper left support rod (41) is located above the lower left support rod (42); the right drafting plate (50) is provided with an upper right support rod (51) and a lower right support rod (52), wherein the upper right support rod (51) is located above the lower right support rod (52); The left sliding block is provided with a left connecting hole (131), and the left upper supporting rod (41) is movably arranged in the left connecting hole (131); the right sliding block is provided with a right connecting hole (141), and the right upper supporting rod (51) is movably arranged in the right connecting hole (141); The two lower moving rods (211) are respectively provided with a left sleeve ring (22) and a right sleeve ring (23); the left lower support rod (42) is movably arranged in the left sleeve ring (22); and the right lower support rod (52) is movably arranged in the right sleeve ring (23).

4. The adjustable drafting tunnel structure according to claim 3, characterized in that: The upper left support rod (41) and the upper left support rod (41) are both perpendicular to the side of the left drafting part (1), and the lower left support rod (42) and the lower right support rod (52) are both perpendicular to the side of the right drafting part (2).

5. The adjustable drafting tunnel structure according to claim 3, characterized in that: The end plate (30) and the right drafting group plate (50) are fixedly connected by bolts.

6. The adjustable drafting tunnel structure according to claim 3, characterized in that: The left drafting plate (40) is provided with a first sealing groove (43) along the height direction, a sealing strip (44) is arranged in the first sealing groove (43), and the sealing strip (44) is located in the overlapping area of ​​the left drafting plate (40) and the end plate (30).

7. The adjustable drafting tunnel structure according to claim 3, characterized in that: The left drafting plate (40) is provided with a second sealing groove (45) along the height direction, and an air bag (46) is arranged in the second sealing groove (45). The air bag (46) is located in the overlapping area of ​​the left drafting plate (40) and the end plate (30).

8. An adjustable drafting tunnel structure according to any one of claims 3 to 7, characterized in that: The upper support frames (10) on both sides of the drafting tunnel respectively extend upward to form support platforms (60), and sealing pads (61) are arranged on the two support platforms (60), and a positioning frame (62) is arranged above the sealing pads (61); The sealing gasket (61) and the positioning frame (62) are located above the drafting tunnel and are in contact with the left drafting portion (1) and the right drafting portion (2) to cover the gaps above the left drafting group plate (40), the right drafting group plate (50) and the end plate (30). The sealing gasket (61) and the positioning frame (62) are provided with an opening (63) at the upper opening of the drafting tunnel.

9. A method for adjusting an adjustable drafting tunnel structure, based on the adjustable drafting tunnel structure according to claim 7, characterized in that: The process includes: When the drafting tunnel needs to be adjusted, the air bag (46) is controlled to be deflated; When it is determined that the airbag (46) has been deflated, the upper driving part (11) and the lower driving part (21) are used to jointly control the movement of the left drafting part (1) and the right drafting part (2); When it is determined that the movement of the left stretching section (1) and the right stretching section (2) is completed, the airbag (46) is controlled to inflate.

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