Cooperating Structure of Rotary Drum and Middle Insert Roller and Method for Preventing Gauze Sheets from Blasting during High-Speed Rotation

Abstract

A cooperating structure of a rotary drum and a middle inserting roller and a method for preventing the gauze sheet from exploding during high-speed rotation. It includes a rotary drum, a bottom knife roller, a second inserting roller, a middle inserting roller, a folding and clamping mechanism, and a fork mechanism. By arranging the bottom knife roller, the second inserting roller, and the middle inserting roller around the outside of the rotary drum, the folding and clamping mechanism and the fork mechanism are connected to the rotary drum. The bottom knife roller is located at the top of the rotary drum, and the middle inserting roller is located at the bottom of the rotary drum. Every four wall plates form a group and are connected to the rotary drum. Multiple groups of wall plates are arranged in a ring shape on the rotary drum. Every three folding and clamping mechanisms form a group and cooperate with a group of wall plates. Every two fork mechanisms form a group and cooperate with a group of wall plates. The folding and clamping knife of the folding and clamping mechanism is located in the folding slit, and the fork rod of the fork mechanism is located outside the rotary drum. During the middle folding, when the two ends of the first inserting crease and the second inserting crease droop, the folding and clamping knife still clamps the gauze sheet, and the adsorption force of the adsorption holes acts on the two ends of the gauze sheet, preventing the ends of the gauze sheet from falling due to its own weight and causing explosion, so that it can be folded and formed under high-speed rotation.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical supplies production equipment, and relates to a cooperation structure between a rotary drum and a middle inserting roller and a method for preventing gauze sheets from exploding during high-speed rotation. Background Art

[0002] Among medical supplies, there is a barium wire gauze used during surgeries. In its main process steps, it involves cutting, first folding, second folding, and middle folding. Cutting mainly involves cutting the gauze released from the gauze roll to form gauze sheets. The first folding and the second folding mainly involve folding the two ends of the gauze sheets. Then, middle folding is carried out. Middle folding is to fold the gauze sheets that have been first folded and second folded in the middle. During this process, the gauze sheets rotate at high speed driven by the rotary drum. Currently, the problem is that since the middle folding is at the bottommost end of the rotary drum, during the folding process, it is easy for the ends of the gauze sheets that have been first folded and second folded to lose force and fall off, resulting in scattering and causing the sheets to explode, and ultimately unable to be folded into shape. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a cooperation structure between a rotary drum and a middle inserting roller and a method for preventing gauze sheets from exploding during high-speed rotation. By arranging a bottom knife roller, a second inserting roller, and a middle inserting roller around the outside of the rotary drum, a folding and clamping mechanism and a fork mechanism are connected to the rotary drum. The bottom knife roller is located at the top of the rotary drum, and the middle inserting roller is located at the bottom of the rotary drum. Every four wall plates form a group and are connected to the rotary drum. Multiple groups of wall plates are arranged annularly on the rotary drum. Every three folding and clamping mechanisms form a group and cooperate with a group of wall plates. Every two fork mechanisms form a group and cooperate with a group of wall plates. The folding and clamping knife of the folding and clamping mechanism is located in the folding slot. The fork rod of the fork mechanism is located outside the rotary drum. The bottom knife roller and the second inserting roller fold the two ends of the gauze sheet, and the middle inserting roller folds the gauze sheet in the middle. During the middle folding, when the two ends of the first inserting fold mark and the second inserting fold mark droop, the folding and clamping knife still clamps the gauze sheet, and the adsorption force of the adsorption holes acts on the ends of the two ends of the gauze sheet, preventing the ends of the gauze sheet from falling due to its own weight and causing explosion, enabling it to be folded into shape under high-speed rotation.

[0004] To solve the above technical problem, the technical solution adopted by the present invention is: A cooperation structure between a rotary drum and a middle inserting roller, which includes a rotary drum, a bottom knife roller, a second inserting roller, a middle inserting roller, a folding and clamping mechanism, and a fork mechanism; the bottom knife roller, the second inserting roller, and the middle inserting roller are located outside the rotary drum, and the bottom knife roller and the middle inserting roller are respectively located at the top and bottom of the rotary drum; the folding and clamping knife of the folding and clamping mechanism swings in the folding slot of the rotary drum, and the fork rod of the fork mechanism swings outside the rotary drum; on the surface of the drum body on both sides of a part of the folding slot of the rotary drum, adsorption holes are provided and communicated with the negative pressure cavity of the rotary drum, and the middle inserting knife of the middle inserting roller is inserted into the folding slot between the adsorption holes.

[0005] The drum is a columnar body with end plates at both ends. A plurality of wall plates arranged in an annular pattern are axially arranged on the surface of the columnar body and connected to the end plates. The hollow shaft passes through the end plates and is connected to the negative pressure chamber in the columnar body.

[0006] A folding gap is arranged between every two wall panels, and every four wall panels form a group to form three folding gaps. A plurality of adsorption holes are arranged on the wall panels on both sides of the middle folding gap to communicate with the negative pressure cavity.

[0007] The roller bodies of the bottom knife roller, the second inserting roller and the middle inserting roller are respectively provided with a first inserting knife, a second inserting knife and a middle inserting knife; the first inserting knife and the second inserting knife are respectively inserted into two folding slits on both sides of the adsorption hole.

[0008] The folding mechanism includes a folding knife connected to the folding shaft, and folding bearings matched with both ends of the folding shaft. The toggle block is connected and fixed to one end of the folding shaft. The folding bearing is matched with the end plate of the drum end, and the toggle block is located outside the end plate.

[0009] The three folding and clamping mechanisms form a group, and the toggle block of the middle folding and clamping mechanism is located at the corresponding ends of the other two toggle blocks.

[0010] The fork mechanism includes fork bearings matched at both ends of the fork shaft, swing arms connected to both ends of the fork shaft, and a fork rod connected to the swing arms; the fork bearings match the end plate of the drum end, and the swing arms are located outside the end plate.

[0011] Every two of the fork mechanisms form a group, and a group of fork mechanisms is combined with a group of wall plates on the rotating drum.

[0012] It also includes a transfer wheel, which is located outside the drum, and a scraper is arranged between the transfer wheel and the middle insert roller; the transfer wheel includes a plurality of adsorption petals connected with the adsorption shaft.

[0013] The method for preventing the gauze sheet from exploding due to high-speed rotation of the rotating drum and the middle insert roller as described above comprises the following steps:

[0014] S1, one insertion and transfer, the bottom knife roller absorbs the cut gauze piece and rotates, a inserting knife inserts the gauze piece into the front folding gap of one group of wall panels of the drum, and the folding knife of the folding mechanism in the front folding gap clamps the gauze piece at the same time, the drum rotates to transfer the gauze piece to the wall panel on the surface of the drum, the bottom knife roller rotates to drive the inserting knife to withdraw from the front folding gap, and the gauze piece is separated from the bottom knife roller; in this step, the fork rods of the two fork mechanisms corresponding to the group of wall panels are still located on the front wall panel and the rear wall panel of the group of wall panels, and the rear end of the gauze piece collapses on the rear fork rod;

[0015] S2. After the double insertion and flipping, the gauze piece continues to rotate driven by the drum. When one-fourth of the rear end of the gauze piece reaches the double insertion roller, the double insertion roller rotates to drive the double insertion knife to insert one-fourth of the rear end of the gauze piece into the crevice of the next fold. The folding knife of the folding mechanism in the crevice of the next fold simultaneously clamps the gauze piece. At the same time, a fork mechanism in front of this group of wall plates drives the front fork rod to flip backward and presses the front end of the gauze piece on the upper part of the adsorption hole on one side of the crevice in the middle of this group of wall plates.

[0016] S3. Continuously press and flip forward. The drum continues to rotate, and the fork rod of the previous fork mechanism continuously presses the front end of the gauze piece. The double insertion roller rotates to drive the double insertion knife to withdraw from the crevice of the next fold. At the same time, the rear fork mechanism drives the rear fork rod to flip forward and presses the rear end of the gauze piece on the upper part of the adsorption hole on the other side of the crevice in the middle of this group of wall plates.

[0017] S4. Keep pressing, clamping and adsorbing. The fork rods of the front and rear fork mechanisms on the same group of wall plates respectively press the ends of the flipped gauze piece. The adsorption force of the adsorption holes acts on the ends of the gauze piece, and the folding knives of the two folding mechanisms still clamp one-fourth of the two ends of the gauze piece. Driven by the rotation of the drum, it moves rapidly towards the middle insertion roller.

[0018] S5. Middle insertion and form a one-fourth crease. When the drum drives the gauze piece to reach the middle insertion roller, the middle insertion roller rotates to drive the middle insertion knife to insert half of the gauze piece into the crevice in the middle of this group of wall plates. The folding knife of the folding mechanism in the middle crevice simultaneously clamps the gauze piece. At the same time, the two fork rods pressing the ends of the gauze piece are flipped in opposite directions driven by the two fork mechanisms, and the folding knives of the two folding mechanisms clamping one-fourth of the two ends of the gauze piece are released, forming a first insertion crease and a second insertion crease. In this step, the folding knife only clamps the crease at half of the gauze piece and does not clamp the ends of the two ends of the gauze piece. The two ends of the first insertion crease and the second insertion crease gradually droop under their own weight without restraint.

[0019] S6. Prevent falling and bursting. When the two ends of the first insertion crease and the second insertion crease are drooping, the folding knife still clamps the gauze piece to prevent it from falling. At the same time, the adsorption force of the adsorption holes acts on the two ends of the gauze piece to prevent the ends of the gauze piece from scattering under its own weight, that is, bursting.

[0020] S7. Scrape and move to form a crease. The drum continues to rotate, and the folding knife of the folding mechanism in the crevice in the middle of this group of wall plates gradually releases the gauze piece. When the gauze piece passes through the scraping piece, it is interfered by the scraping piece, causing the gauze piece to displace slightly and expose the middle crease. In this step, the adsorption force of the adsorption holes still acts on the middle crease, and the gauze piece does not fall.

[0021] At S8, after folding and transfer, when the drum continues to rotate and drives the gauze sheet to move to the transfer wheel, the transfer wheel rotates and drives the adsorption flap to transfer the folded gauze sheet to the next station; in this step, the adsorption force of the adsorption flap is greater than the adsorption force of the adsorption holes on both sides of the folding slit.

[0022] The main beneficial effects of the present invention are as follows:

[0023] Four wall plates form a group, two fork mechanisms form a group, and three folding clamp mechanisms form a group; a group of wall plates has three folding slits, and the folding clamp knives of the three folding clamp mechanisms swing within the folding slits; the fork rods of the two fork mechanisms flip from both ends of a group of wall plates towards the middle, or flip from the middle towards both ends.

[0024] Adsorption holes are provided on both sides of the folding slit in the middle of a group of wall plates and are communicated with the negative pressure chamber of the drum, forming an adsorption force on both sides of the folding slit.

[0025] The bottom knife roller and the second inserting roller respectively complete the quarter fold of the front end of the gauze sheet and the quarter fold of the rear end, and the middle inserting roller completes the center folding.

[0026] During the center folding process, when the gauze sheet is clamped, at the clamping position, the ends of the gauze sheet are not clamped. The two ends of the first inserting fold mark and the second inserting fold mark will sag under their own weight. As the drum continues to rotate, the gauze sheet gradually shifts, and the clamped end gradually approaches the adsorption hole and finally adsorbs the two ends of the gauze sheet, preventing the ends of the gauze sheet from falling due to their own weight and causing the sheet to burst.

[0027] The folded gauze sheet in the middle is separated from the clamping under the action of the scraping blade and exposes the middle folding crease, and is transferred to the next process when passing through the transfer wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the drawings and embodiments:

[0029] Figure 1 It is a layout schematic diagram of the present invention.

[0030] Figure 2 It is a structural schematic diagram of a group of wall plates of the present invention connected to the drum.

[0031] Figure 3 For Figure 2 the cross-sectional schematic diagram.

[0032] Figure 4 It is a structural schematic diagram of the folding clamp mechanism of the present invention.

[0033] Figure 5 It is a structural schematic diagram of the fork mechanism of the present invention.

[0034] Figure 6 It is a structural schematic diagram of the middle inserting roller of the present invention.

[0035] Figure 7 It is a schematic structural diagram of the transfer wheel of the present invention.

[0036] Figure 8 It is a state diagram of the gauze piece of the present invention during the folding process.

[0037] Figure 9 The present invention is a folded gauze piece.

[0038] In the figure: a rotating drum 1, a hollow shaft body 11, a negative pressure chamber 12, a folding gap 13, an adsorption hole 14, a bottom knife roller 2, a first inserting knife 21, a second inserting roller 3, a second inserting knife 31, a middle inserting roller 4, a middle inserting knife 41, a folding mechanism 5, a folding shaft 51, a folding knife 52, a folding bearing 53, a toggle block 54, a fork mechanism 6, a fork shaft 61, a fork bearing 62, a swing arm 63, a fork rod 64, a transfer wheel 7, an adsorption shaft 71, an adsorption petal 72, and a scraper 8. DETAILED DESCRIPTION

[0039] like Figures 1 to 9 In the invention, a drum and middle insert roller matching structure is disclosed, which comprises a drum 1, a bottom knife roller 2, a second insert roller 3, a middle insert roller 4, a folding mechanism 5 and a fork mechanism 6; the bottom knife roller 2, the second insert roller 3 and the middle insert roller 4 are located outside the drum 1, and the bottom knife roller 2 and the middle insert roller 4 are located at the top and the bottom of the drum 1 respectively; the folding knife 52 of the folding mechanism 5 is located in the folding gap 13 of the drum 1 and swings, and the fork rod 64 of the fork mechanism 6 is located outside the drum 1 and swings; a part of the drum body surface of the drum 1 on both sides of the folding gap 13 is provided with adsorption holes 14 which are connected with the negative pressure chamber 12 of the drum 1, and the middle insert knife 41 of the middle insert roller 4 is inserted into the folding gap 13 between the adsorption holes 14. When in use, the bottom knife roller 2 and the second inserting roller 3 fold the two ends of the gauze piece, and the middle inserting roller 4 folds the gauze piece in the center. During the center folding, while the two ends of the first inserting crease and the second inserting crease are drooping, the folding knife 52 still clamps the gauze piece, and the adsorption force of the adsorption hole 14 acts on the ends of the gauze piece to prevent the ends of the gauze piece from scattering due to their own weight and causing the piece to explode, so that it can be folded into shape under high-speed rotation.

[0040] In a preferred embodiment, the drum 1 is a columnar body with end plates at both ends, a plurality of wall plates arranged in an annular pattern are axially arranged on the surface of the columnar body and connected to the end plates, and the hollow shaft body 11 passes through the end plates and communicates with the negative pressure chamber 12 in the columnar body. When in use, the hollow shaft body 11 is connected to a vacuum pump to generate negative pressure in the negative pressure chamber 12.

[0041] In a preferred embodiment, a folding slit 13 is provided between every two of the said wall plates. Every four wall plates form a group, resulting in three folding slits 13. A plurality of adsorption holes 14 are provided on the wall plates on both sides of the middle folding slit 13 and are communicated with the negative pressure chamber 12. During use, the folding slit 13 in the middle of the same group of wall plates is used to cooperate with the middle inserting roller 4 for middle folding. The adsorption holes 14 communicate with the negative pressure chamber 12 to adsorb the end of the gauze piece, and the two folding slits 13 on both sides of the same group of wall plates cooperate with the bottom knife roller 2 and the second inserting roller 3 respectively for folding the end of the gauze piece.

[0042] In a preferred embodiment, a first inserting knife 21, a second inserting knife 31 and a middle inserting knife 41 are respectively provided on the roller surfaces of the bottom knife roller 2, the second inserting roller 3 and the middle inserting roller 4. The first inserting knife 21 and the second inserting knife 31 are respectively inserted into the two folding slits 13 on both sides of the adsorption hole 14. During use, when folding both ends of the gauze piece, the first inserting knife 21 on the bottom knife roller 2 and the second inserting knife 31 on the second inserting roller 3 insert one-fourth of the front and back ends of the gauze piece into the folding slit 13, and the middle inserting knife 41 on the middle inserting roller 4 inserts one-half of the gauze piece into the folding slit 13.

[0043] In a preferred embodiment, the folding clamp mechanism 5 includes a folding clamp knife 52 connected to the shaft body of the folding clamp shaft 51, and folding clamp bearings 53 cooperating with both ends of the folding clamp shaft 51. A toggle block 54 is fixedly connected to one end of the folding clamp shaft 51. The folding clamp bearings 53 cooperate with the end plates at the ends of the drum 1, and the toggle block 54 is located outside the end plate. During use, the toggle block 54 cooperates with the cam mechanism. The cam mechanism drives the toggle block 54 to drive the folding clamp shaft 51 to rotate. When the folding clamp shaft 51 rotates around the folding clamp bearings 53, it drives the folding clamp knife 52 to swing to clamp or release the gauze piece. The cam mechanism is not shown in the figure.

[0044] In a preferred embodiment, three of the said folding clamp mechanisms 5 form a group, and the toggle block 54 of the middle folding clamp mechanism 5 is located at the corresponding end of the other two toggle blocks 54. During use, there are two cam mechanisms, which are distributed on the side surfaces of the two end plates of the drum 1, and drive the two toggle blocks 54 at one end and one toggle block 54 at the other end respectively to avoid interference.

[0045] In a preferred embodiment, the fork mechanism 6 includes fork bearings 62 cooperating with both ends of a fork shaft 61, swing arms 63 connected to both ends of the fork shaft 61, and a fork rod 64 connected to the swing arms 63. The fork bearings 62 cooperate with the end plates at the ends of the drum 1, and the swing arms 63 are located outside the end plate. During use, the swing arm 63 of the fork mechanism 6 cooperates with a cam disc. The cam disc drives the swing arm 63 to drive the fork shaft 61 to rotate around the fork bearings 62, and when the fork shaft 61 rotates, it drives the fork rod 64 to flip. The cam disc is not shown in the figure.

[0046] In the preferred solution, every two fork mechanisms 6 form a group, and a group of fork mechanisms 6 is combined with a group of wall panels on the drum 1. When in use, four wall panels form a group and cooperate with two fork mechanisms 6. The fork rod 64 of the fork mechanism 6 is mainly used to flip the ends of the gauze sheet at both ends and press the ends of the gauze sheet to hold the gauze sheet on the wall panels.

[0047] In the preferred embodiment, a transfer wheel 7 is further included, and the transfer wheel 7 is located outside the drum 1. A scraper 8 is arranged between the transfer wheel 7 and the middle insert roller 4. The transfer wheel 7 includes a plurality of adsorption petals 72 connected to an adsorption shaft 71. When in use, after the two ends of the gauze sheet are folded in half and the middle part is folded in half, a crease is formed, and under the intervention of the scraper 8, the gauze sheet is separated from the folding gap 13 and moves toward the transfer wheel 7. The adsorption shaft 71 of the transfer wheel 7 is a hollow structure, and is connected to the centrifugal fan and the adsorption petal 72. When the folded gauze sheet moves to the adsorption petal 72, the adsorption force of the adsorption petal 72 is greater than the adsorption force of the adsorption hole 14 on the drum 1, thereby adsorbing the gauze sheet and transferring it to the next process under the rotation of the transfer wheel 7.

[0048] In a preferred embodiment, the method for preventing the gauze sheet from exploding due to high-speed rotation of the rotating drum and the middle insert roller as described above comprises the following steps:

[0049] S1, insert and transfer, the bottom knife roller 2 absorbs the cut gauze piece and rotates, an inserting knife 21 inserts the gauze piece into the front folding slit 13 of one group of wall panels of the drum 1, and the folding knife 52 of the folding mechanism 5 in the front folding slit 13 clamps the gauze piece at the same time, and the drum 1 rotates to transfer the gauze piece to the wall panel on the surface of the drum 1, and the bottom knife roller 2 rotates to drive the inserting knife 21 to withdraw from the front folding slit 13, and the gauze piece is separated from the bottom knife roller 2; in this step, the fork rods 64 of the two fork mechanisms 6 corresponding to the group of wall panels are still located on the front wall panel and the rear wall panel of the group of wall panels, and the rear end of the gauze piece collapses on the rear fork rod 64;

[0050] S2, the two inserts are reversed, and the gauze piece continues to rotate under the drive of the drum 1. When a quarter of the rear end of the gauze piece reaches the second insert roller 3, the second insert roller 3 rotates and drives the second insert knife 31 to insert a quarter of the rear end of the gauze piece into the rear folding slit 13, and the folding knife 52 of the folding mechanism 5 in the rear folding slit 13 clamps the gauze piece at the same time; at the same time, a fork mechanism 6 in front of the set of wall panels drives a fork rod 64 in front to reverse backward, and presses the front end of the gauze piece to hold the upper part of the adsorption hole 14 on one side of the folding slit 13 in the middle of the set of wall panels;

[0051] S3. Continuously press and flip forward. The drum 1 continues to rotate. The fork rod 64 of the previous fork mechanism 6 continuously presses the front end of the gauze piece. The second inserting roller 3 rotates to drive the second inserting knife 31 to withdraw from the rear folding slit 13. At the same time, the rear fork mechanism 6 drives the rear fork rod 64 to flip forward and presses the rear end of the gauze piece above the adsorption hole 14 on the other side of the folding slit 13 in the middle of this group of wall plates.

[0052] S4. Keep pressing, clamping and adsorbing. The fork rods 64 of the front and rear fork mechanisms 6 on the same group of wall plates respectively press the ends of the flipped gauze piece. The adsorption force of the adsorption holes 14 acts on the ends of the gauze piece, and the folding knives 52 of the two folding mechanisms 5 still clamp the two ends of the gauze piece at one-fourth positions. Driven by the rotation of the drum 1, it drives the gauze piece to move rapidly towards the middle inserting roller 4.

[0053] S5. Middle insert and form a one-fourth crease. When the drum 1 drives the gauze piece to reach the middle inserting roller 4, the middle inserting roller 4 rotates to drive the middle inserting knife 41 to insert half of the gauze piece into the folding slit 13 in the middle of this group of wall plates. The folding knives 52 of the folding mechanism 5 in the middle folding slit 13 clamp the gauze piece at the same time. At the same time, the two fork rods 64 pressing the ends of the gauze piece are flipped in opposite directions under the drive of the two fork mechanisms 6, and the folding knives 52 of the two folding mechanisms 5 clamping the two ends of the gauze piece at one-fourth positions are loosened, forming a first insert crease and a second insert crease. In this step, the folding knife 52 only clamps the crease at half of the gauze piece and does not clamp the ends of the two ends of the gauze piece. The two ends of the first insert crease and the second insert crease gradually droop under their own weight after being released from restraint.

[0054] S6. Prevent falling and splitting. When the two ends of the first insert crease and the second insert crease are drooping, the folding knife 52 still clamps the gauze piece to prevent it from falling. At the same time, the adsorption force of the adsorption holes 14 acts on the ends of the two ends of the gauze piece to prevent the ends of the gauze piece from scattering under its own weight, that is, splitting. In this step, the double-fold fork rod protects the gauze piece at the same time.

[0055] S7. Scrape and shift to form a crease. The drum 1 continues to rotate. The folding knife 52 of the folding mechanism 5 in the folding slit 13 in the middle of this group of wall plates gradually loosens the gauze piece. When the gauze piece passes through the scraping piece 8, it is interfered by the scraping piece 8, causing the gauze piece to displace slightly and expose the middle crease. In this step, the adsorption force of the adsorption holes 14 still acts on the middle crease, and the gauze piece does not fall.

[0056] S8. Transfer after folding. The drum 1 continues to rotate to drive the gauze piece to move to the transfer wheel 7. The transfer wheel 7 rotates to drive the adsorption flap 72 to transfer the folded gauze piece to the next working station. In this step, the adsorption force of the adsorption flap 72 is greater than the adsorption force of the adsorption holes 14 on both sides of the folding slit 13.

[0057] The above method can not only transfer the cut gauze pieces to the rotary drum 1 at high speed, but also perform the first folding during the transfer process; after the gauze pieces are folded twice and enter the middle folding stage, the gauze pieces will not scatter and cause chip explosion under the action of the clamping force and the adsorption force during the middle folding stage.

[0058] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The embodiments in this application and the features in the embodiments can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A cooperating structure of a rotary drum and a middle inserting roller, characterized in that: It comprises a rotating drum (1), a bottom knife roller (2), two inserting rollers (3), a middle inserting roller (4), a folding mechanism (5) and a fork mechanism (6); the bottom knife roller (2), the two inserting rollers (3) and the middle inserting roller (4) are located outside the rotating drum (1), and the bottom knife roller (2) and the middle inserting roller (4) are located at the top and the bottom of the rotating drum (1) respectively; the folding knife (52) of the folding mechanism (5) is located in a folding slit (13) of the rotating drum (1) and swings, and the fork rod (64) of the fork mechanism (6) is located outside the rotating drum (1) and swings; a drum body surface on both sides of a part of the folding slit (13) of the rotating drum (1) is provided with adsorption holes (14) which are connected to the negative pressure chamber (12) of the rotating drum (1), and the middle inserting knife (41) of the middle inserting roller (4) is inserted into the folding slit (13) between the adsorption holes (14); The rotating drum (1) is a columnar body with end plates at both ends, a plurality of wall plates arranged in an annular pattern are axially arranged on the surface of the columnar body and connected to the end plates, and a hollow shaft (11) passes through the end plates and is connected to a negative pressure chamber (12) in the columnar body; A folding slit (13) is provided between every two of the wall panels, and every four wall panels form a group to form three folding slits (13), and a plurality of adsorption holes (14) are provided on the wall panels on both sides of the middle folding slit (13) and communicate with the negative pressure chamber (12); The folding mechanism (5) comprises a folding knife (52) connected to the shaft of the folding shaft (51), and a folding bearing (53) matched with both ends of the folding shaft (51), and a toggle block (54) connected and fixed to one end of the folding shaft (51); the folding bearing (53) matches with an end plate at the end of the rotating drum (1), and the toggle block (54) is located outside the end plate; The shift fork mechanism (6) comprises shift fork bearings (62) matched at both ends of the shift fork shaft (61), swing arms (63) connected to both ends of the shift fork shaft (61), and a shift fork rod (64) connected to the swing arm (63); the shift fork bearing (62) matches an end plate at the end of the drum (1), and the swing arm (63) is located outside the end plate.

2. The cooperating structure of the rotary drum and the middle inserting roller according to claim 1, characterized in that: The surfaces of the bottom knife roller (2), the second inserting roller (3) and the middle inserting roller (4) are respectively provided with a first inserting knife (21), a second inserting knife (31) and a middle inserting knife (41); the first inserting knife (21) and the second inserting knife (31) are respectively inserted into two folding slits (13) on both sides of the adsorption hole (14).

3. The cooperating structure of the rotary drum and the middle inserting roller according to claim 1, wherein: The three folding and clamping mechanisms (5) form a group, and the toggle block (54) of the middle folding and clamping mechanism (5) is located at the corresponding ends of the other two toggle blocks (54).

4. The cooperating structure of the rotary drum and the middle inserting roller according to claim 1, characterized in that: Every two of the fork mechanisms (6) form a group, and a group of fork mechanisms (6) is combined with a group of wall plates on the rotating drum (1).

5. The cooperating structure of the rotary drum and the middle inserting roller according to claim 1, characterized in that: It also comprises a transfer wheel (7), the transfer wheel (7) being located outside the rotating drum (1), and a scraper (8) being arranged between the transfer wheel (7) and the middle insert roller (4); the transfer wheel (7) comprises a plurality of adsorption petals (72) connected to an adsorption shaft (71).

6. The method for preventing the gauze sheet from bursting during high-speed rotation by the cooperation of the rotary drum and the middle inserting roller according to any one of claims 1 to 5, characterized in that, It includes the following steps: S1, insert and transfer, the bottom knife roller (2) absorbs the cut gauze piece and rotates, an inserting knife (21) inserts the gauze piece into the front folding slit (13) of one group of wall panels of the rotating drum (1), and the folding knife (52) of the folding mechanism (5) in the front folding slit (13) clamps the gauze piece at the same time, and the rotating drum (1) rotates to transfer the gauze piece to the wall panel on the surface of the rotating drum (1), and the bottom knife roller (2) rotates to drive the inserting knife (21) to withdraw from the front folding slit (13), and the gauze piece is separated from the bottom knife roller (2); in this step, the fork rods (64) of the two fork mechanisms (6) corresponding to the group of wall panels are still located on the front wall panel and the rear wall panel of the group of wall panels, and the rear end of the gauze piece collapses on the rear fork rod (64); S2, the two inserts are reversed, and the gauze piece continues to rotate under the drive of the rotating drum (1). When a quarter of the rear end of the gauze piece reaches the second insert roller (3), the second insert roller (3) rotates to drive the two insert knives (31) to insert a quarter of the rear end of the gauze piece into the rear folding slit (13), and the folding knife (52) of the folding mechanism (5) in the rear folding slit (13) clamps the gauze piece at the same time; at the same time, a fork mechanism (6) in front of the set of wall panels drives a fork rod (64) in front to reverse backward, and presses the front end of the gauze piece against the upper part of the adsorption hole (14) on one side of the folding slit (13) in the middle of the set of wall panels; S3, continue to press and flip forward, the drum (1) continues to rotate, the fork rod (64) of the front fork mechanism (6) continues to press the front end of the gauze piece; the two insertion rollers (3) rotate to drive the two insertion knives (31) to withdraw from the rear folding slit (13); at the same time, the rear fork mechanism (6) drives the rear fork rod (64) to flip forward and press the rear end of the gauze piece on the upper part of the adsorption hole (14) on the other side of the folding slit (13) in the middle of the group of wall panels; S4, maintaining the pressing, clamping and adsorption, the fork rods (64) of the front and rear fork mechanisms (6) on the same set of wall panels respectively press the ends of the turned gauze piece, the adsorption force of the adsorption holes (14) acts on the ends of the gauze piece, and the folding and clamping knives (52) of the two folding and clamping mechanisms (5) still clamp the gauze piece at one-fourth of both ends, and drive it to move at high speed in the direction of the middle insertion roller (4) under the rotation of the rotating drum (1); S5, inserting the gauze piece in the middle and forming a quarter fold. When the drum (1) drives the gauze piece to reach the middle inserting roller (4), the middle inserting roller (4) rotates and drives the middle inserting knife (41) to insert half of the gauze piece into the folding slit (13) in the middle of the set of wall panels. The folding knife (52) of the folding mechanism (5) in the middle folding slit (13) clamps the gauze piece at the same time. At the same time, the two fork rods (64) pressing the ends of the gauze piece are turned in opposite directions under the drive of the two fork mechanisms (6). The folding knives (52) of the two folding mechanisms (5) clamping the two quarters of the two ends of the gauze piece are released, forming a first insertion fold and a second insertion fold. In this step, the folding knife (52) only clamps the half of the fold of the gauze piece, and does not clamp the ends of the two ends of the gauze piece. The two ends of the first insertion fold and the second insertion fold gradually sag under their own weight after being freed from constraints. S6, anti-falling and anti-chip. During the process of the two ends of the first insertion crease and the second insertion crease drooping, the folding cutter (52) still clamps the gauze piece to prevent it from falling. At the same time, the adsorption force of the adsorption holes (14) acts on the ends of both sides of the gauze piece to prevent the ends of the gauze piece from scattering due to its own weight, that is, anti-chip; S7, scraping to form a crease. The rotary drum (1) continues to rotate. The folding cutter (52) of the folding mechanism (5) in the folding crevice (13) in the middle of this group of wall plates gradually loosens the gauze piece. When the gauze piece passes through the scraping piece (8), after being interfered by the scraping piece (8), the gauze piece is displaced slightly and the middle crease is exposed; in this step, the adsorption force of the adsorption holes (14) still acts on the middle crease, and the gauze piece does not fall; S8, transfer after folding. The rotary drum (1) continues to rotate to drive the gauze piece to move to the transfer wheel (7). The transfer wheel (7) rotates to drive the adsorption flap (72) to transfer the folded gauze piece to the next working station; in this step, the adsorption force of the adsorption flap (72) is greater than the adsorption force of the adsorption holes (14) on both sides of the folding crevice (13).

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