All-cotton sanitary pad surface layer, sterilization device and sterilization method thereof

Abstract

The application discloses a full-cotton sanitary pad surface layer, a sterilization device and a sterilization method thereof, and relates to the technical field of sterilization of sanitary products. The device comprises a box body, a conveying structure, a turnover structure and an adsorption structure. The hollow pipes of the turnover structure are assembled at the side plates of the box body, the outer sidewalls of the hollow pipes are provided with a plurality of turnover plates, the turnover plates are provided with adsorption holes, the hollow pipes are provided with cams, the turnover plates are provided with opening and closing structures matched with the cams, the opening and closing structures are driven by the cams to switch the adsorption holes between the open and closed states during the turnover process, the adsorption holes are open to adsorb materials when the adsorption holes face upward, and the adsorption holes are closed to release materials when the adsorption holes face downward. The top sterilization module of the box body irradiates the materials on the front and back surfaces in sequence. The application realizes the continuous and automatic operation of the full-cotton sanitary pad surface layer from conveying, turnover, double-side sterilization to material falling, and improves the sterilization efficiency and uniformity.

Description

Technical Field

[0001] This invention relates to the field of sterilization technology for sanitary products, specifically to the surface layer of all-cotton sanitary pads, sterilization devices, and sterilization methods. Background Technology

[0002] In the production of sanitary products such as all-cotton panty liners, sterilization is a crucial step in ensuring product safety and hygiene. Existing sterilization equipment typically uses conveyor belts to transport materials to a location under ultraviolet lamps or disinfection nozzles for sterilization. However, this single-sided irradiation method only sterilizes the top side of the material, failing to simultaneously disinfect the bottom side, resulting in incomplete sterilization. While some devices have implemented a flipping mechanism between two sets of conveyors to turn the material over, allowing for sterilization of the other side after flipping, these flipping mechanisms often require additional independent drive motors and complex transmission mechanisms. This not only increases equipment cost and structural complexity but also places higher demands on the spatial layout of the production line.

[0003] Furthermore, ensuring that the material is reliably fixed during the flipping process and can be smoothly detached after flipping is a key factor affecting the continuity and stability of production. Some existing devices use negative pressure adsorption to fix the material, but the adsorption on / off usually relies on independent vacuum control valves or additional electrical signals, resulting in a complex system configuration and response delays. At the same time, the material conveying and flipping actions are often controlled separately by independent drive systems, making precise timing coordination difficult. This can easily lead to material interference, jamming, or conveying interruptions due to asynchronous actions, affecting the overall operating efficiency and reliability of the automated production line. Summary of the Invention

[0004] The purpose of this invention is to provide a cotton sanitary pad surface layer, a sterilization device and a sterilization method thereof, in order to solve the problems in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The sterilization device includes a housing, several conveying structures, several intermittent structures, several tilting structures, several adjusting structures, several opening and closing structures, and several adsorption structures. The box includes a top plate and two side plates symmetrically fixed on both sides of the lower end of the top plate. Several sterilization modules are fixed in the middle of the lower end of the top plate, and several through openings are provided in the side walls of the side plates. The conveying structure includes a motor and several conveying units. The motor is mounted on the outer wall of a side plate and is connected to a corresponding conveying unit. Several conveying units are installed inside the housing and arranged in a progressive manner in front and behind along the conveying direction, and are correspondingly located below the sterilization module. Every two adjacent conveying units are connected by a drive. Each conveying unit is connected to an intermittent structure. The conveying unit includes a gear. Several intermittent structures are installed on the outer side wall of the side plate on which the first gear is mounted, and each intermittent structure is connected to a flipping structure; the intermittent structure drives the flipping structure to rotate intermittently under the drive of the first gear. Several of the aforementioned flipping structures are installed between two of the side plates, and each of the flipping structures is located between two conveying units; the flipping structure includes a hollow tube, the two ends of which are respectively assembled at the through openings of the two side plates, and several flipping units are fixedly distributed at equal intervals along the outer wall of the hollow tube in its circumference, and several flipping plates are fixedly distributed along the circumference of the hollow tube in the flipping unit, and several adsorption holes are opened on each of the flipping plates. The adjustment structure includes a cam, which is coaxially disposed inside the hollow tube; each of the opening and closing structures is disposed within a flip plate. During the flipping process, the opening and closing structure is driven and controlled by the cam to switch states. When the adsorption hole of the flipping plate faces upward, the opening and closing structure releases the blockage and the adsorption hole is in a conductive state. When the adsorption hole of the flipping plate faces downward, the opening and closing structure blocks the adsorption hole and cuts off the adsorption path. The suction end of the adsorption structure is connected to the inside of the flipping plate; the adsorption structure forms a negative pressure adsorption on the material through the adsorption holes in the conductive state, and works with the flipping structure to complete the flipping of the material.

[0006] Preferably, each conveying unit includes two conveying shafts, several conveying wheels, several conveyor belts, a drive wheel, and a gear. The two conveying shafts are arranged in parallel inside the housing, and their ends are rotatably connected to the inner walls of two side plates, respectively. One of the conveying shafts passes through the side plates and extends to the outer sides of the two side plates, with its ends fixedly connected to the drive wheel and gear. Several conveying wheels are coaxially fixedly mounted on each conveying shaft, and the conveyor belts are wound around the outside of the conveying wheels to convey materials. The motor output is fixedly connected to the drive wheel of a conveying unit; every two adjacent drive wheels of the conveying units are connected by a drive belt; the gear is connected to the intermittent structure.

[0007] Preferably, the intermittent structure includes a second gear, a rotating column, a bias plate, a contact rod, and an indexing plate; the second gear meshes with the first gear, and the second gear is coaxially fixed with the rotating column; the rotating column is rotatably mounted on the outer wall of the side plate where the motor is not installed, the bias plate is fixed to the outer wall of the rotating column, and the contact rod is fixed to the bias plate; the indexing plate is located on the outer wall of the side plate where the rotating column is mounted, and is fixedly connected to one end of the hollow tube; the outer wall of the indexing plate has a plurality of arc grooves and slots distributed alternately along the circumference, the arc grooves are matched with the rotating column, and the slots are matched with the contact rod.

[0008] Preferably, the adjustment structure further includes two connecting plates and two fixing rods. The two connecting plates are respectively fixedly connected to both ends of the cam. The end of the connecting plate away from the cam is fixedly connected to the fixing rod, and the end of the fixing rod away from the connecting plate is fixedly connected to the outer wall of the same side plate.

[0009] Preferably, the opening and closing structure includes a base plate, rollers, a plurality of lower wedges, a plurality of upper wedges, and a plurality of sealing units; the base plate is slidably assembled inside the flip plate; the rollers are rotatably mounted on one end of the base plate near the cam, and the rollers are in rolling contact with the outer edge of the cam; the plurality of lower wedges are fixed equidistantly on the base plate, and each upper wedge is slidably assembled on the inclined surface of the lower wedges, and the upper wedges are provided with a plurality of sealing units for sealing the adsorption holes.

[0010] Preferably, the sealing unit includes a sealing rod, a sealing plate, a sealing head, and a second return spring; the sealing rod and the second return spring are alternately fixed to the end of the upper wedge block away from the lower wedge block, the sealing plate is fixed to the end of the sealing rod away from the upper wedge block, the outer diameter of the sealing plate is larger than the inner diameter of the adsorption hole, the sealing head is fixed to the end of the sealing plate away from the sealing rod, each sealing head corresponds to one adsorption hole, and the outer diameter of the sealing head is smaller than the inner diameter of the adsorption hole, the other end of the second return spring is fixedly connected to the inner wall of the flip plate where the adsorption hole is opened; A guide block is fixed to the outer wall of the upper wedge, and a guide opening matching the guide block is provided on the inner wall of the flipping plate. A second fixing plate is fixed on the base plate, and a first fixing plate is fixed on the inner wall of the flip plate with adsorption holes. A first reset spring is fixed between the second fixing plate and the first fixing plate. The base plate and the first fixing plate are respectively provided with an installation port and a sliding port for installing the suction end of the adsorption structure.

[0011] Preferably, the adsorption structure includes a main pipe, a circular annular pipe, a fixed ring, several branch pipes, and several diversion pipes; one end of the main pipe is connected to the suction end of a vacuum pump, and the other end of the main pipe is connected to the circular annular pipe. A ring sleeve plate is rotatably installed on the circular annular pipe. Several branch pipes are fixedly connected to the ring sleeve plate and their ends extend into the interior of the circular annular pipe. The other end of each branch pipe is fixedly connected to the fixed ring. The outer wall of the branch pipe is correspondingly connected to the diversion pipe located inside the flip plate. The outer wall of the diversion pipe is slidably engaged with the inner wall of the mounting port of the second fixed plate, and the outer wall of the diversion pipe is fixedly engaged with the inner wall of the sliding port of the first fixed plate.

[0012] The surface layer of the all-cotton sanitary pad includes a substrate, which is a thin rectangular sheet. The substrate is formed by interlacing pure cotton fibers to form a mesh skeleton, and the mesh skeleton forms evenly distributed pores.

[0013] The sterilization method, applied to the above-mentioned sterilization device, includes the following steps: S1. Material conveying: The pre-treated and formed cotton sanitary pad surface material is placed sequentially on the conveyor belt of each conveyor unit. The motor drives the transmission wheel to rotate, and the transmission belt drives each conveyor unit to move synchronously and progressively, so that the material moves smoothly and in segments, passing through the flipping station and the sterilization station in sequence. S2, Intermittent Tilting Drive: The conveyor shaft rotates synchronously with the conveying operation, driving gear one to rotate synchronously. Gear one meshes with and drives gear two to rotate in conjunction with the rotating column. The rotating column drives the bias plate and the contact rod to periodically engage with the indexing plate, driving the hollow tube to rotate intermittently at a fixed angle, so that each tilting plate cycles through the material picking, tilting, and dropping stations, realizing the intermittent flipping operation of materials. S3, Negative Pressure Adsorption and Material Handling: When the flip plate rotates with the hollow tube to the material handling position with the adsorption hole facing upward, the roller disengages from the cam protrusion profile. Through the inclined push cooperation of the lower wedge and the upper wedge, the upper wedge moves away from the adsorption hole, causing the sealing unit to disengage from the adsorption hole as a whole, and the adsorption hole is fully open. The vacuum pump forms a stable negative pressure adsorption airflow through the main pipe, the annular pipe, the branch pipe, and the diversion pipe. The cotton sanitary pad surface layer conveyed above is adsorbed and fixed on the surface of the flip plate through the open adsorption hole. S4. Double-sided sterilization: After the material is adsorbed and fixed, the hollow tube continues to rotate intermittently, driving the flipping plate and the adsorbed and fixed protective pad to flip synchronously. During the flipping process, the sterilization module at the top of the box continuously outputs sterilization light, which sequentially covers the front and back of the material for sterilization, eliminating bacteria on the surface of the fabric and achieving double-sided sterilization without dead angles. S5. Automatic Material Discharge with Sealing and Pressure Breaking: When the flipping plate rotates to the material discharge station with the adsorption hole facing downwards, the roller enters the cam protrusion profile. The cam pushes the bottom plate into the flipping plate through the roller and slides inwards. The upper wedge is pushed towards the adsorption hole by the inclined surfaces of the lower wedge and the upper wedge. The sealing head is inserted into the adsorption hole and the sealing plate is pressed tightly at the adsorption hole port, completely cutting off the negative pressure adsorption path. After the material loses the negative pressure adsorption force, it automatically falls to the next conveying unit, completing a single material flipping and sterilization operation. This cycle is repeated to achieve continuous automated sterilization production of the surface layer of all-cotton sanitary pads.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention uses a hollow tube to drive a flipping plate to circulate and flip between the material picking station and the material unloading station. With the help of an opening and closing structure, negative pressure is conducted to adsorb materials when the adsorption holes are facing upwards, and the negative pressure is blocked and cut off when the adsorption holes are facing downwards, so that the materials can fall off automatically. Combined with the sterilization module on the top of the box, the front and back of the materials are irradiated and sterilized in sequence during the flipping process. This realizes continuous automated operation of the cotton sanitary pad surface layer from conveying, flipping, double-sided sterilization to unloading, which effectively improves the sterilization efficiency and sterilization uniformity of the sanitary product production line.

[0015] 2. The opening and closing structure of this invention uses the rolling contact between the roller and the outer edge of the stationary cam. During the rotation of the flipping plate, the cam profile drives the base plate to slide. The horizontal motion is converted into the vertical motion of the sealing unit through the inclined surface cooperation of the lower wedge and the upper wedge, realizing the automatic switching of the adsorption hole being open at the material picking station and sealed at the material dropping station. Compared with the scheme of using solenoid valves or cylinders to control the adsorption opening and closing, no external pneumatic or electrical control components are required, simplifying the system structure and reducing the failure rate. At the same time, the first and second reset springs work together to achieve double sealing of the sealing head inserting into the adsorption hole and the sealing plate pressing the port, improving the reliability of cutting off the negative pressure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one side of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure on the other side of the entire invention.

[0018] Figure 3 This is a schematic diagram of the conveying structure of the present invention.

[0019] Figure 4 This is a schematic diagram of the flipping structure and the adjusting structure of the present invention.

[0020] Figure 5 For the present invention Figure 4 A schematic diagram of the structure at point A in the middle.

[0021] Figure 6This is a schematic diagram of the flipping structure and the adsorption structure of the present invention.

[0022] Figure 7 For the present invention Figure 6 A structural diagram of location B in the middle.

[0023] Figure 8 This is a schematic diagram of the structure of fixing plate one and fixing plate two of the present invention.

[0024] Figure 9 This is a schematic diagram of the indexing disk in the intermittent structure of the present invention.

[0025] Figure 10 This is a schematic diagram of the structure of the all-cotton sanitary pad surface layer of the present invention.

[0026] Attached image annotations: 1. Box body; 11. Top plate; 111. Sterilization module; 12. Side plate; 121. Through opening; 2. Conveying structure; 21. Conveying shaft; 22. Conveying wheel; 23. Conveying belt; 24. Drive wheel; 25. Drive belt; 26. Gear 1; 27. Motor; 3. Intermittent structure; 31. Gear II; 32. Rotating column; 33. Offset plate; 34. Contact rod; 35. Indexing plate; 36. Arc groove; 37. Slot; 4. Flipping structure; 41. Hollow tube; 42. Flipping plate; 421. Fixing plate one; 4211. Sliding mouth; 43. Adsorption hole; 5. Adjustment structure; 51. Cam; 52. Connecting plate; 53. Fixing rod; 6. Opening and closing structure; 61. Base plate; 611. Fixing plate two; 6111. Mounting port; 612. Return spring one; 62. Roller; 63. Lower wedge block; 64. Upper wedge block; 641. Guide block; 65. Sealing rod; 66. Sealing plate; 67. Sealing head; 68. Return spring two; 7. Adsorption structure; 71. Main pipe; 72. Circular annular pipe; 721. Ring sleeve plate; 73. Branch pipe; 74. Diversion pipe; 75. Fixing ring; 81. Substrate; 82. Mesh skeleton; 83. Pores. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] In one embodiment, such as Figures 1-9 As shown, the sterilization device includes a housing 1, several conveying structures 2, several intermittent structures 3, several tilting structures 4, several adjusting structures 5, several opening and closing structures 6, and several adsorption structures 7. The box 1 includes a top plate 11 and two side plates 12 symmetrically fixed on both sides of the lower end of the top plate 11. Several sterilization modules 111 are fixed in the middle of the lower end of the top plate 11, and several through holes 121 are opened through the side walls of the side plates 12. The conveying structure 2 includes a motor 27 and several conveying units. The motor 27 is installed on the outer side wall of a side plate 12 and is connected to a corresponding conveying unit. Several conveying units are installed inside the housing 1 and are arranged in a progressive manner in front and behind along the conveying direction, and are correspondingly located below the sterilization module 111. Every two adjacent conveying units are connected by a drive. Each conveying unit is connected to an intermittent structure 3. The conveying unit includes a gear 26. Several intermittent structures 3 are installed on the outer side wall of the side plate 12 equipped with gear 26, and each intermittent structure 3 is connected to a flipping structure 4; the intermittent structure 3 drives the flipping structure 4 to rotate intermittently under the drive of gear 26. Several of the aforementioned flipping structures 4 are installed between two of the side plates 12, and each of the flipping structures 4 is located between two conveying units; the flipping structure 4 includes a hollow tube 41, the two ends of which are respectively fitted to the through openings 121 of the two side plates 12, and several flipping units are fixedly distributed at equal intervals along the outer wall of the hollow tube 41. Several flipping plates 42 are fixedly distributed along the circumference of the hollow tube 41, and several adsorption holes 43 are opened on each of the flipping plates 42. The adjustment structure 5 includes a cam 51, which is coaxially disposed inside the hollow tube 41; each of the opening and closing structures 6 is disposed within a flip plate 42. During the flipping process of the flipping structure 4, the opening and closing structure 6 is driven and controlled by the cam 51 to achieve state switching; when the adsorption hole 43 of the flipping plate 42 faces upward, the opening and closing structure 6 releases the blockage and the adsorption hole 43 is in the conductive state; when the adsorption hole 43 of the flipping plate 42 faces downward, the opening and closing structure 6 blocks the adsorption hole 43 and cuts off the adsorption path. The suction end of the adsorption structure 7 is connected to the inside of the flipping plate 42; the adsorption structure 7 forms a negative pressure adsorption on the material through the adsorption hole 43 in the conductive state, and works with the flipping structure to complete the flipping of the material.

[0029] In this embodiment, motor 27 starts and drives the corresponding connected conveying unit to operate. Each conveying unit achieves synchronous segmented progressive conveying through transmission connection, sequentially conveying the cotton sanitary pad surface material forward along the conveying direction. During material conveying, the transmission component of the conveying unit drives gear 26 to rotate. Gear 26 transmits power to intermittent structure 3. Under the continuous drive of gear 26, intermittent structure 3 drives the hollow tube 41 in the flipping structure 4 to rotate intermittently at a fixed angle. When the hollow tube 41 rotates, several flipping plates 42 distributed circumferentially on its outer wall cyclically switch between the material picking station, the flipping station, and the material dropping station. When the tilting plate 42 rotates to the material handling position with the adsorption holes 43 facing upwards, the opening and closing structure 6 inside the tilting plate 42 is driven by the stationary cam 51 coaxially set inside the hollow tube 41, releasing the blockage of the adsorption holes 43 and making the adsorption holes 43 fully open. At this time, the suction end of the adsorption structure 7 forms a negative pressure inside the tilting plate 42, adsorbing and fixing the material on the conveying unit above the tilting plate 42 onto the surface of the tilting plate 42 through the open adsorption holes 43. Subsequently, the hollow tube 41 continues to rotate intermittently, and the tilting plate 42 with adsorbed material carries the material to the material dropping position with the adsorption holes 43 facing downwards. During this process, the opening and closing structure 6 is driven by the cam 51 to block the adsorption holes 43, cutting off the adsorption path. After losing the negative pressure adsorption force, the material automatically falls off the surface of the tilting plate 42 to the next conveying unit, completing the flipping. Throughout the entire flipping process, the sterilization module 111 on the top of the box 1 can be at least one of the existing technologies, such as ultraviolet germicidal lamp, deep ultraviolet LED, ozone generator or plasma generator, and is fixedly installed on the lower end face of the top plate. During the material flipping process, it continuously outputs sterilization light or sterilization substance to fully cover and sterilize both sides of the protective pad surface.

[0030] In an optional embodiment, each conveying unit includes two conveying shafts 21, a plurality of conveying wheels 22, a plurality of conveyor belts 23, a drive wheel 24, and a gear 26; the two conveying shafts 21 are arranged in parallel inside the housing 1, and the two ends of the two conveying shafts 21 are respectively rotatably connected to the inner sidewalls of two side plates 12, wherein one of the conveying shafts 21 passes through the side plate 12 and extends to the outer side of the two side plates 12, and the shaft ends are fixedly connected to the drive wheel 24 and the gear 26 respectively; a plurality of conveying wheels 22 are coaxially fixedly mounted on each of the conveying shafts 21, and the conveyor belts 23 are wound around the outer side of the conveying wheels 22 to convey materials; The output end of the motor 27 is fixedly connected to the drive wheel 24 of a conveying unit; the drive wheels 24 of each two adjacent conveying units are connected by a drive belt 25; the gear 26 is connected to the intermittent structure 3.

[0031] It should be noted that during operation, the motor 27 drives the transmission wheel 24 of a conveying unit to rotate, and the transmission belt 25 enables each conveying unit to operate synchronously. Each conveying shaft 21 drives the conveying wheel 22 and the conveying belt 23 to convey the material forward in segments. At the same time, the gear 26 at the end of the conveying shaft 21 rotates with the shaft, transmitting power to the intermittent structure 3 to drive the flipping structure 4 to perform intermittent flipping action, thereby realizing the linkage between material conveying and flipping.

[0032] In an optional embodiment, the intermittent structure 3 includes a second gear 31, a rotating column 32, a bias plate 33, a contact rod 34, and an indexing plate 35; the second gear 31 is meshed with a first gear 26, and the second gear 31 is coaxially fixed with the rotating column 32; the rotating column 32 is rotatably mounted on the outer wall of the side plate 12 where the motor 27 is not installed, the bias plate 33 is fixed on the outer wall of the rotating column 32, and the contact rod 34 is fixed on the bias plate 33; the indexing plate 35 is located on the outer wall of the side plate 12 where the rotating column 32 is installed, and is fixedly connected to one end of the hollow tube 41; the outer wall of the indexing plate 35 has a plurality of arc grooves 36 and slots 37 distributed circumferentially, the arc grooves 36 are matched with the rotating column 32, and the slots 37 are matched with the contact rods 34.

[0033] It should be noted that when the intermittent structure is running, gear 21 meshes with gear 126, driving the rotating column 32 and the contact rod 34 on the bias plate 33 to rotate. The contact rod 34 periodically engages in the slot 37 of the indexing plate 35, pushing it to rotate intermittently. At the same time, the arc groove 36 cooperates with the rotating column 32, thereby converting the continuous rotational power of gear 126 into the intermittent fixed-angle rotation output of the hollow tube 41, realizing the rhythm control of the flipping action of the flipping plate 42.

[0034] In an optional embodiment, the adjustment structure 5 further includes two connecting plates 52 and two fixing rods 53. The two connecting plates 52 are respectively fixedly connected to both ends of the cam 51. The end of the connecting plate 52 away from the cam 51 is fixedly connected to the fixing rod 53. The end of the fixing rod 53 away from the connecting plate 52 is fixedly connected to the outer wall of the side plate 12 on the same side.

[0035] It should be noted that the cam 51 is coaxially supported in the internal space of the hollow tube 41, and because the fixing rod 53 is fixedly connected to the outer wall of the side plate 12, the cam 51 always remains stationary inside the hollow tube 41 and will not rotate with the rotation of the hollow tube 41. At the same time, this structure stably mounts the cam 51 between the side plates 12, ensuring that the rotation axis of the cam 51 coincides with the rotation axis of the hollow tube 41. This allows the roller 62 in the opening and closing structure 6 inside the flip plate 42 to maintain continuous rolling contact with the outer edge of the cam 51 when the flip plate 42 rotates with the hollow tube 41, thereby realizing the drive control of the opening and closing structure 6 at different rotation angles.

[0036] In an optional embodiment, the opening and closing structure 6 includes a base plate 61, rollers 62, a plurality of lower wedges 63, a plurality of upper wedges 64, and a plurality of sealing units; the base plate 61 is slidably mounted in the flip plate 42; the rollers 62 are rotatably mounted on one end of the base plate 61 near the cam 51, and the rollers 62 are in rolling contact with the outer edge of the cam 51; the plurality of lower wedges 63 are fixed at equal intervals on the base plate 61, and each upper wedge 64 is slidably mounted on the inclined surface of the lower wedge 63, and the upper wedge 64 is provided with a plurality of sealing units for sealing the adsorption holes 43.

[0037] The sealing unit includes a sealing rod 65, a sealing plate 66, a sealing head 67, and a second return spring 68. The sealing rod 65 and the second return spring 68 are alternately fixed to the end of the upper wedge 64 away from the lower wedge 63. The sealing plate 66 is fixed to the end of the sealing rod 65 away from the upper wedge 64. The outer diameter of the sealing plate 66 is larger than the inner diameter of the adsorption hole 43. The sealing head 67 is fixed to the end of the sealing plate 66 away from the sealing rod 65. Each sealing head 67 corresponds to one adsorption hole 43, and the outer diameter of the sealing head 67 is smaller than the inner diameter of the adsorption hole 43. The other end of the second return spring 68 is fixedly connected to the inner wall of the flip plate 42 where the adsorption hole 43 is opened. The upper wedge 64 has a guide block 641 fixed to its outer side wall, and the flip plate 42 has a guide opening that matches the guide block 641 on its inner side wall. A second fixing plate 611 is fixed on the base plate 61. A first fixing plate 421 is fixed on the inner wall of the flip plate 42 which has an adsorption hole 43. A first return spring 612 is fixed between the second fixing plate 611 and the first fixing plate 421. The base plate 61 and the first fixing plate 421 are respectively provided with an installation port 6111 and a sliding port 4211 for installing the suction end of the adsorption structure 7.

[0038] It should be noted that the roller 62 maintains rolling contact with the outer edge of the cam 51, which is stationary inside the hollow tube 41. When the tilting plate 42 rotates with the hollow tube 41 to different work positions, the roller 62 rolls along the outer edge contour of the cam 51. Under the pushing action of the contour surface of the cam 51, the roller 62 drives the base plate 61 to slide back and forth inside the tilting plate 42.

[0039] When the tilting plate 42 rotates to the position where the roller 62 is disengaged from the protruding profile of the cam 51, the lower wedge block 63 moves accordingly and pushes the upper wedge block 64 to overcome the elastic force of the return spring 68 and move away from the adsorption hole 43 through the inclined plane. The upper wedge block 64 drives the sealing rod 65, the sealing plate 66 and the sealing head 67 to move synchronously as a whole, so that the sealing head 67 is pulled out of the adsorption hole 43 and the sealing plate 66 leaves the port of the adsorption hole 43, and the adsorption hole 43 is fully open; when the tilting plate 42 rotates to the position where the roller 62 is disengaged from the protruding profile of the cam 51, the lower wedge block 63 moves accordingly and pushes the upper wedge block 64 to overcome the elastic force of the return spring 68 and move away from the adsorption hole 43. When the cam 51 enters the raised profile position, the base plate 61 slides in the opposite direction away from the adsorption hole 43 under the retraction action of the return spring 612. The lower wedge block 63 moves in the opposite direction with the base plate 61, releasing the inclined push on the upper wedge block 64. Under the auxiliary reset action of the return spring 68, the upper wedge block 64 moves towards the adsorption hole 43, driving the sealing head 67 to insert into the adsorption hole 43 and the sealing plate 66 to press against the port of the adsorption hole 43, thus achieving double sealing of the adsorption hole 43.

[0040] During this process, the guide block 641 fixed on the outer wall of the upper wedge 64 slides and engages with the guide opening on the inner wall of the flip plate 42, providing guidance for the vertical movement of the upper wedge 64 and ensuring that the sealing unit operates smoothly and is accurately aligned; the diversion pipe 74 passes through the sliding opening 4211 of the first fixed plate 421 and is fixedly engaged with the inner wall of the sliding opening, while the outer wall of the diversion pipe 74 slides and engages with the inner wall of the mounting opening 6111 of the second fixed plate 611, so that when the bottom plate 61 slides, the suction end of the adsorption structure 7 can slide flexibly relative to the mounting opening 6111 without affecting the transmission of negative pressure airflow, ensuring that the air path remains unobstructed throughout the sliding process of the bottom plate. The entire opening and closing structure is driven by the mechanical profile of cam 51 and elastically reset by return spring 612 and return spring 68. When the flip plate 42 rotates to the material picking station, it automatically opens the adsorption path and automatically cuts off the adsorption path when it flips to the material dropping station. This achieves pure mechanical linkage control of adsorption and material discharge without the need for external electrical signal intervention. The response is timely and reliable, and the structure is compact and low in cost.

[0041] In an optional embodiment, the adsorption structure 7 includes a main pipe 71, an annular pipe 72, a fixing ring 75, several branch pipes 73, and several diversion pipes 74. One end of the main pipe 71 is connected to the suction end of a vacuum pump, and the other end of the main pipe 71 is connected to the annular pipe 72. A ring plate 721 is rotatably mounted on the annular pipe 72. Several branch pipes 73 are fixedly connected to the ring plate 721 and their ends extend into the interior of the annular pipe 72. The other end of each branch pipe 73 is fixedly connected to the fixing ring 75. The outer wall of the branch pipe 73 is correspondingly connected to the diversion pipe 74 disposed inside the flip plate 42. The outer wall of the diversion pipe 74 is slidably engaged with the inner wall of the mounting port 6111 of the second fixing plate 611, and the outer wall of the diversion pipe 74 is fixedly engaged with the inner wall of the sliding port 4211 of the first fixing plate 421.

[0042] It should be noted that the vacuum pump forms a negative pressure adsorption airflow inside the flip plate 42 through the main pipe 71, the annular pipe 72, the branch pipe 73, and the diverter pipe 74. The ring plate 721 rotates with the annular pipe 72, allowing the branch pipe 73 and the diverter pipe 74 to rotate synchronously with the flip plate 42, thus keeping the air passage unobstructed. The outer wall of the diverter pipe 74 slides with the mounting port 6111 of the fixed plate 611, ensuring that the air passage connection is not affected when the base plate 61 slides. The fixing ring 75 fixes each branch pipe 73 into one piece to enhance the stability during rotation, thereby achieving a continuous and stable supply of negative pressure adsorption force during the flipping process.

[0043] In one embodiment, such as Figure 10 As shown, the surface layer of the all-cotton sanitary pad includes a substrate 81, which is a thin rectangular sheet. The substrate 81 is formed by interlacing pure cotton fibers to form a mesh skeleton 82, and uniformly distributed pores 83 are formed between the mesh skeletons 82.

[0044] It should be noted that the mesh skeleton 82 formed by the interweaving of pure cotton fibers gives the surface layer good softness and structural strength. The evenly distributed pores 83 make the surface layer have excellent air permeability, which is conducive to the rapid passage and diffusion of liquids or gases. At the same time, these pores 83 can make the adsorption airflow evenly distributed during the negative pressure adsorption process, so that the adsorption force is dispersed on the surface of the surface layer, avoiding wrinkles or deformation of the surface layer due to excessive local adsorption force, and ensuring the stability of the material posture and the reliability of adsorption positioning during the flipping process.

[0045] The sterilization method, applied to the above-mentioned sterilization device, includes the following steps: S1. Material conveying: The pre-treated and formed cotton sanitary pad surface material is placed sequentially on the conveyor belt 23 of each conveying unit. The transmission wheel 24 is driven by the motor 27 to rotate, and the transmission belt 25 drives each conveying unit to convey synchronously and progressively, so that the material moves smoothly and in segments, passing through the flipping station and the sterilization station in sequence. S2, Intermittent Tilting Drive: The conveyor shaft 21 rotates synchronously with the conveying operation, driving gear 1 26 to rotate synchronously. Gear 1 26 meshes with and drives gear 2 31 to rotate in conjunction with the rotating column 32. The rotating column 32 drives the bias plate 33 and the contact rod 34 to periodically engage with the indexing plate 35, driving the hollow tube 41 to rotate intermittently at a fixed angle, so that each tilting plate 42 cycles through the material picking, tilting, and unloading positions, realizing the intermittent flipping operation of materials; S3, Negative Pressure Adsorption and Material Handling: When the flip plate 42 rotates with the hollow tube 41 to the material handling position with the adsorption hole 43 facing upward, the roller 62 disengages from the protruding profile of the cam 51. Through the inclined push cooperation of the lower wedge block 63 and the upper wedge block 64, the upper wedge block 64 moves away from the adsorption hole 43, causing the sealing unit to disengage from the adsorption hole 43 as a whole, and the adsorption hole 43 is fully open; the vacuum pump forms a stable negative pressure adsorption airflow through the main pipe 71, the annular pipe 72, the branch pipe 73, and the diversion pipe 74, and adsorbs and fixes the cotton sanitary pad surface layer conveyed above to the surface of the flip plate 42 through the open adsorption hole 43; S4. Double-sided sterilization: After the material is adsorbed and fixed, the hollow tube 41 continues to rotate intermittently, driving the flipping plate 42 and the adsorbed and fixed protective pad to flip synchronously. During the flipping process, the sterilization module 111 at the top of the box 1 continuously outputs sterilization light, which sequentially covers the front and back of the material for sterilization, eliminating bacteria on the surface of the fabric and achieving double-sided sterilization without dead angles. S5. Automatic Material Discharge with Pressure Cut-off: When the flipping plate 42 rotates to the material discharge station with the adsorption hole 43 facing downwards, the roller 62 enters the protruding contour of the cam 51. The cam 51 pushes the bottom plate 61 through the roller 62 and slides into the flipping plate 42. The upper wedge 64 is pushed to move closer to the adsorption hole 43 by the inclined surface cooperation of the lower wedge 63 and the upper wedge 64. The sealing head 67 is inserted into the adsorption hole 43 and the sealing plate 66 is pressed tightly at the port of the adsorption hole 43, completely cutting off the negative pressure adsorption path. After the material loses the negative pressure adsorption force, it automatically falls to the next conveying unit, completing the single material flipping and sterilization operation. The cycle is repeated to realize the continuous automated sterilization production of the surface layer of the all-cotton sanitary pad.

[0046] It should be noted that the entire sterilization method uses conveying power to simultaneously drive the material forward and reverse, and utilizes the mechanical control of the cam profile to achieve the switching between adsorption and discharge states. It does not require a complex electrical control system, has high operational stability and is easy to maintain, significantly improving the efficiency of double-sided sterilization and ensuring sterilization uniformity.

[0047] Any aspects of this invention not described in detail are well-known to those skilled in the art.

[0048] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A sterilization device, characterized in that, include: Box (1), the top of which is equipped with a number of sterilization modules (111) for irradiating and sterilizing the surface layer of cotton sanitary pads. The conveying structure (2) includes several conveying units. Several conveying units are installed inside the box (1) and arranged in a progressive manner in front and behind along the conveying direction. Every two adjacent conveying units are connected by a transmission and are correspondingly located below the sterilization module (111). A flipping structure (4) is located between two conveying units and is used to grab, flip, and release the cotton sanitary pad surface layer; the two ends of the hollow tube (41) in the flipping structure (4) are respectively assembled at the through-hole (121) of the side plate (12) in the box (1); a number of flipping units are fixedly distributed at equal intervals along the axial direction of the outer wall of the hollow tube (41); each flipping unit includes a number of flipping plates (42) fixedly distributed along the circumference of the hollow tube (41); a number of adsorption holes (43) are opened on each flipping plate (42); the internal cavity of the flipping plate (42) is also connected to an adsorption structure (7); the adsorption structure (7) forms a negative pressure adsorption on the material through the adsorption holes (43) in the conductive state; The hollow tube (41) is also equipped with a cam (51) coaxial with the hollow tube (41). Each flip plate (42) is provided with an opening and closing structure (6) that cooperates with the cam (51), so that during the flipping process of the flipping structure (4), the opening and closing structure (6) is driven and controlled by the cam (51) to switch the flipping plate (42) in the flipping structure (4) between the grasping and releasing states. When the adsorption hole (43) in the flip plate (42) faces upward, the opening and closing structure (6) is unblocked and the adsorption hole (43) is in a conductive state; When the adsorption hole (43) in the flip plate (42) faces downward, the opening and closing structure (6) blocks the adsorption hole (43) and cuts off the adsorption path.

2. The sterilization device according to claim 1, characterized in that, Each of the conveying units includes: Two conveying shafts (21) are arranged in parallel inside the housing (1). The two ends of the two conveying shafts (21) are rotatably connected to the inner sidewalls of the two side plates (12). One of the conveying shafts (21) passes through the side plate (12) and extends to the outside of the two side plates (12). One end of the conveying shaft (21) is fixedly connected to a transmission wheel (24), and the other end is fixedly connected to a gear (26). The gear (26) is connected to the intermittent structure (3) in a transmission connection; A plurality of conveyor wheels (22) are coaxially fixedly mounted on each of the conveyor shafts (21); A conveyor belt (23) is wound around the outside of the conveyor wheel (22) to transport materials; The motor (27) is fixedly connected to the transmission wheel (24) of a conveying unit; The drive belt (25) connects the drive wheels (24) of each two adjacent conveying units.

3. The sterilization device according to claim 2, characterized in that, The intermittent structure (3) includes: Gear 2 (31): Gear 2 (31) meshes with Gear 1 (26); Rotating column (32), the rotating column (32) is fixed coaxially with gear two (31), the rotating column (32) is rotatably installed on the outer side wall of the side plate (12) where the motor (27) is not installed; A bias plate (33) is fixed to the outer wall of the rotating column (32); Contact rod (34), which is fixed on the bias plate (33); Indexing plate (35), the indexing plate (35) is located on the outer side wall of the side plate (12) on which the rotating column (32) is installed, and is fixedly connected to one end of the hollow tube (41); the outer wall of the indexing plate (35) has a number of arc grooves (36) and slots (37) distributed circumferentially, the arc grooves (36) are matched with the rotating column (32), and the slots (37) are matched with the contact rod (34).

4. The sterilization device according to claim 1, characterized in that, Two connecting plates (52) are fixedly connected to both ends of the cam (51). A fixing rod (53) is fixedly connected to the end of the connecting plate (52) away from the cam (51). The end of the fixing rod (53) away from the connecting plate (52) is fixedly connected to the outer wall of the side plate (12) on the same side.

5. The sterilization device according to claim 1, characterized in that, The opening and closing structure (6) includes: The base plate (61) is slidably fitted inside the flip plate (42); A roller (62) is rotatably mounted on one end of the base plate (61) near the cam (51), and the roller (62) makes rolling contact with the outer edge of the cam (51); A plurality of lower wedges (63) are fixed at equal intervals on the base plate (61); A plurality of upper wedges (64), each of which is slidably fitted onto the inclined surface of a lower wedge (63). A plurality of sealing units are provided on the upper wedge (64) for sealing the adsorption holes (43).

6. The sterilization device according to claim 5, characterized in that, The blocking unit includes: The sealing rod (65) and the second return spring (68) are alternately fixed at the end of the upper wedge (64) away from the lower wedge (63); The other end of the second reset spring (68) is fixedly connected to the inner wall of the flip plate (42) which has an adsorption hole (43); A sealing plate (66) is fixed to the end of the sealing rod (65) away from the upper wedge (64), and the outer diameter of the sealing plate (66) is larger than the inner diameter of the adsorption hole (43); A plugging head (67) is fixed to one end of the plugging plate (66) away from the plugging rod (65). Each plugging head (67) corresponds to an adsorption hole (43), and the outer diameter of the plugging head (67) is smaller than the inner diameter of the adsorption hole (43). The upper wedge (64) has a guide block (641) fixed on its outer side wall, and the flip plate (42) has a guide opening on its inner side wall that matches the guide block (641). A second fixing plate (611) is fixed on the base plate (61). A first fixing plate (421) is fixed on the inner wall of the adsorption hole (43) of the flip plate (42). A first reset spring (612) is fixed between the second fixing plate (611) and the first fixing plate (421). The base plate (61) and the first fixing plate (421) are respectively provided with an installation port (6111) and a sliding port (4211) for installing the suction end of the adsorption structure (7).

7. The sterilization device according to claim 6, characterized in that, The adsorption structure (7) includes a main pipe (71), a circular ring pipe (72), a fixed ring (75), several branch pipes (73) and several diversion pipes (74). The main pipe (71) is connected at one end to the vacuum pump's suction end; A circular tube (72) is connected to the other end of the main tube (71), and a ring sleeve plate (721) is rotatably mounted on the circular tube (72). A plurality of branch pipes (73), wherein the plurality of branch pipes (73) are fixedly connected to the ring plate (721) and the ends extend into the interior of the circular ring pipe (72); A fixing ring (75) is fixedly connected to the other end of each branch pipe (73); Several diversion pipes (74) are provided, one end of which is located inside the flip plate (42) and the other end is connected to the inside of the branch pipe (73). The outer wall of the diversion pipe (74) is slidably engaged with the inner wall of the mounting port (6111) of the second fixed plate (611), and the outer wall of the diversion pipe (74) is fixedly engaged with the inner wall of the sliding port (4211) of the first fixed plate (421).

8. A method for sterilization using the sterilization device according to any one of claims 1-7, characterized in that, Includes the following steps: S1. Material conveying: The cotton sanitary pad surface material is placed on the conveyor belt (23) of each conveying unit, and the motor (27) drives each conveying unit to convey synchronously. S2, Intermittent flipping drive: Gear 1 (26) drives the hollow tube (41) to rotate intermittently through the intermittent structure (3), so that the flipping plate (42) cycles between the material picking, flipping and unloading stations; S3, negative pressure adsorption conduction material collection: when the flip plate (42) rotates to the adsorption hole (43) facing upward, the sealing unit disengages from the adsorption hole (43) to make the adsorption hole (43) conduction, and the vacuum pump adsorbs and fixes the material on the surface of the flip plate (42) through the adsorption structure (7). S4, Double-sided sterilization: The flip plate (42) carries the material to flip, and during the flipping process, the sterilization module (111) irradiates the front and back of the material in sequence to sterilize. S5. Automatic material discharge after sealing and pressure cut-off: When the flip plate (42) rotates to the point where the adsorption hole (43) faces down, the sealing unit seals the adsorption hole (43) to cut off the negative pressure, and the material automatically falls off, completing the single material flipping and sterilization operation. The cycle is repeated to realize the continuous automated sterilization production of the surface layer of the all-cotton sanitary pad.

9. A cotton sanitary pad surface layer, comprising a substrate (81), wherein the substrate (81) is a thin rectangular sheet, the substrate (81) is formed by interlaced pure cotton fibers to form a mesh skeleton (82), and uniformly distributed pores (83) are formed between the mesh skeletons (82), characterized in that, It was manufactured using the method described in claim 8.

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