Inner paper breakage-proof corrugated paper preprocessing device

Abstract

The application relates to a corrugated paper pre-treatment device capable of preventing inner paper from being broken, which comprises a steam spraying rod, a water outlet pipe, a ball valve, a memory alloy and a transmission assembly. The steam spraying rod is provided with a containing cavity. The upper end of the steam spraying rod is provided with a steam inlet. The side of the steam spraying rod facing the paperboard is provided with a steam spraying port. The lower end of the steam spraying rod is provided with a water outlet. The steam inlet, the steam spraying port and the water outlet are all communicated with the containing cavity. The water outlet pipe is connected to the inner wall of the water outlet. The ball valve is connected to the water outlet pipe and is used for controlling the on-off of the water outlet pipe. One end of the memory alloy is connected to the steam spraying rod, and the other end of the memory alloy is connected to the transmission assembly. The transmission assembly is connected to the ball valve. The memory alloy is used for controlling the rotation of the ball valve. When the steam spraying rod is stacked with condensed water at the bottom, the memory alloy is deformed due to low contact temperature. The transmission assembly drives the ball valve to rotate, and the water outlet is opened to drain water. When the memory alloy contacts water vapor, the memory alloy restores the deformation. The ball valve is reset, the probability of water vapor overflowing from the water outlet is reduced, and the paperboard is protected.

Description

TECHNICAL FIELD

[0001] The application relates to the field of corrugated paper processing, in particular to a corrugated paper pre-treatment device for preventing the inner paper from being broken. BACKGROUND

[0002] With the development of society, most commodities are now packaged in cartons, and the cartons are generally made of corrugated paperboard. Due to dry weather and other reasons, the paperboard is dry and brittle, and the folding resistance of the carton is reduced during the folding process of the carton. The face paper and the inner paper of the carton are prone to burst or break, resulting in unqualified cartons and increasing the production cost of the cartons.

[0003] In the production process of the carton, the paperboard is heated and humidified by using appropriate amount of steam, so that the paperboard is softened before being pressed, thereby achieving a good anti-burst and anti-cracking effect.

[0004] The existing paperboard humidifying equipment sprays steam on the creasing position of the stacked paperboard by using a steam spraying rod when humidifying the paperboard. The steam in the steam spraying rod is liquefied into water droplets when it is cooled, and the condensed water accumulates at the bottom of the steam spraying rod. The operator opens the water outlet to drain the water.

[0005] However, when the device is used for a long time or the staff forgets to drain the water, the condensed water is prone to overflow from the steam spraying port, and the overflowing water contacts the paperboard, causing the paperboard to be too wet, which affects the printing quality in the subsequent printing. SUMMARY

[0006] In order to protect the paperboard, the application provides a corrugated paper pre-treatment device for preventing the inner paper from being broken.

[0007] The corrugated paper pre-treatment device for preventing the inner paper from being broken provided by the application adopts the following technical scheme:

[0008] The corrugated paper pre-treatment device for preventing the inner paper from being broken comprises a steam spraying rod, a water outlet pipe, a ball valve, a memory alloy and a transmission assembly. The steam spraying rod is provided with a containing cavity. The upper end of the steam spraying rod is provided with a steam inlet. One side of the steam spraying rod facing the paperboard is provided with a steam spraying port. The lower end of the steam spraying rod is provided with a water outlet. The steam inlet, the steam spraying port and the water outlet are all communicated with the containing cavity. The water outlet pipe is connected to the inner wall of the water outlet. The ball valve is connected to the water outlet pipe and is used to control the opening and closing of the water outlet pipe. One end of the memory alloy is connected to the steam spraying rod, and the other end of the memory alloy is connected to the transmission assembly. The transmission assembly is connected to the ball valve. The memory alloy is used to control the rotation of the ball valve.

[0009] By adopting the above technical solution, when condensate is piled up at the bottom of the steam spray bar, the shape memory alloy has a low contact temperature and deforms. The deformation is caused by the deformation of the shape memory alloy, which drives the ball valve to rotate through the transmission component, opening the water outlet to drain the water. When the shape memory alloy comes into contact with water vapor, it recovers its deformation, the ball valve resets, and the water outlet closes, reducing the probability of water vapor overflowing from the water outlet, improving processing quality, and protecting the cardboard.

[0010] Preferably, the transmission assembly includes a first gear and a first rack, the first gear being coaxially and fixedly connected to the valve stem of the ball valve, the first rack being connected to a shape memory alloy, and the first gear meshing with the first rack.

[0011] By adopting the above technical solution, when the shape memory alloy deforms, it drives the first gear to rotate through the first rack, thereby controlling the rotation of the ball valve. The operation is simple and the drainage is automatically controlled.

[0012] Preferably, the corrugated paper pretreatment device for preventing liner breakage further includes a baffle and a drive plate. The outer wall of the steam spray rod is provided with a drive port, which is connected to the receiving cavity. The baffle is fixedly connected to the inner wall of the drive port. The drive plate is located on the side of the baffle away from the receiving cavity and is slidably connected to the inner wall of the drive port. One end of the shape memory alloy is fixedly connected to the drive plate, and the other end of the shape memory alloy is connected to the baffle. The first rack is fixedly connected to the end of the drive plate away from the shape memory alloy. The shape memory alloy deforms within the drive port, pushing the drive plate to move.

[0013] By adopting the above technical solution, the shape memory alloy deformation drives the drive plate to move, and the movement of the drive plate controls the rotation of the ball valve through the transmission component. The operation is simple, and the shape memory alloy is in direct contact with water vapor or condensate, making it easier to sense temperature deformation.

[0014] Preferably, the corrugated paper pretreatment device for preventing liner breakage further includes a waterproof ring, the outer periphery of the drive plate is provided with an annular groove, the waterproof ring is coaxially embedded in the annular groove, and the outer wall of the waterproof ring abuts against the inner wall of the drive port.

[0015] By adopting the above technical solution, the waterproof ring makes it difficult for water inside the steam spray bar to leak out from the drive port, thus improving the sealing between the drive plate and the inner wall of the drive port.

[0016] Preferably, the corrugated paper pretreatment device for preventing the inner paper from breaking further includes a positioning plate, which is fixedly connected to the inner wall of the drive port. The positioning plate is located on the side of the drive plate away from the baffle, and the positioning plate has a positioning opening in which the first rack slides.

[0017] By adopting the above technical solution, the positioning port guides the sliding of the first rack, making the sliding of the first rack stable and the meshing of the first rack with the first gear stable, thereby achieving stable control of the ball valve rotation.

[0018] Preferably, the corrugated paper pretreatment device for preventing tearing of the inner paper further includes a first spring. The baffle is provided with a sliding opening. The end of the shape memory alloy away from the drive plate is slidably connected to the inner wall of the sliding opening. The end of the shape memory alloy away from the drive plate is fixedly connected to a fixing block. The end of the fixing block facing the drive plate is used to abut against the end of the baffle away from the drive plate. The first spring is disposed inside the drive opening. The first spring is sleeved on the outer periphery of the first rack. One end of the first spring is fixedly connected to the drive plate. The other end of the first spring is fixedly connected to the positioning plate. When the shape memory alloy deforms and shortens, the first spring is in a stretched state.

[0019] By adopting the above technical solution, when the shape memory alloy deforms and shortens, it pulls the drive plate to move, which in turn moves the first rack and stretches the first spring. When the shape memory alloy recovers its deformation and elongates, the first spring pulls the drive plate to move in order to recover its deformation, which in turn resets the first rack. The structure is simple, easy to control, and runs stably.

[0020] Preferably, the corrugated paper pretreatment device for preventing liner breakage further includes a sliding rod, a float, a second rack, and a second gear. The outer wall of the steam spray rod is provided with an overflow port, which is connected to the receiving cavity. The sliding rod is slidably connected to the inner wall of the overflow port, and the float is slidably connected to the inner wall of the receiving cavity. The upper end of the float is used to abut against the lower end of the sliding rod. The sliding rod is connected to the second rack, and the second gear is coaxially fixedly connected to the first gear. The second gear meshes with the second rack.

[0021] By adopting the above technical solution, when the condensate temperature is high, the shape memory alloy does not detect the deformation and shrinkage temperature. The water volume in the cavity increases, the float rises, and abuts against the sliding rod, causing the sliding rod to move, controlling the rotation of the second gear, opening the ball valve, and draining water. The shape memory alloy slides in the sliding port and will not interfere with the rotation of the ball valve, reducing the probability of condensate overflow and protecting the cardboard.

[0022] Preferably, the inner wall of the receiving cavity is provided with a guide groove, and one end of the float is connected to a guide block, which is slidably embedded in the guide groove.

[0023] By adopting the above technical solution, the guide groove guides the sliding of the guide block, thereby guiding the sliding of the float block, so that the float block can stably push the sliding rod to move, reducing the probability of condensate overflow and protecting the cardboard.

[0024] Preferably, the end of the sliding rod facing the float has a guide surface, and the distance from the guide surface to the second rack increases with the increase of height.

[0025] By adopting the above technical solution, the guide surface makes it easier for the float to push the sliding rod, improving the stability of the float pushing the sliding rod, reducing the probability of condensate overflow, and protecting the cardboard.

[0026] Preferably, there are multiple steam injection ports, which are spaced apart along the length of the steam injection rod.

[0027] By adopting the above technical solution, multiple steam nozzles heat and humidify the stacked cardboard, reducing the probability of the cardboard cracking.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. When condensate accumulates at the bottom of the steam spray bar, the shape memory alloy has a low contact temperature and deforms. This deformation drives the ball valve to rotate via the transmission assembly, opening the outlet for drainage. When the shape memory alloy comes into contact with water vapor, it recovers its deformation, the ball valve resets, and the outlet closes, reducing the probability of water vapor overflowing from the outlet, improving processing quality, and protecting the cardboard.

[0030] 2. When the shape memory alloy deforms and shortens, it pulls the drive plate to move, which in turn moves the first rack and stretches the first spring. When the shape memory alloy recovers its deformation and elongates, the first spring pulls the drive plate to move in order to recover its deformation, which in turn resets the first rack. The structure is simple, easy to control, and runs stably.

[0031] 3. When the condensate temperature is high, the shape memory alloy does not detect the deformation shrinkage temperature, the water volume in the cavity increases, the float rises and abuts against the sliding rod, causing the sliding rod to move, controlling the rotation of the second gear, opening the ball valve to drain the water. The shape memory alloy slides within the sliding port and will not interfere with the rotation of the ball valve, reducing the probability of condensate overflow and protecting the cardboard. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of a corrugated paper pretreatment device for preventing the inner liner from breaking.

[0033] Figure 2 This is a schematic diagram of the overall structure of the injection assembly, drainage assembly, and transmission assembly.

[0034] Figure 3 This is a schematic diagram of the internal structure of the corrugated paper pretreatment device for preventing lining breakage.

[0035] Figure 4 It is a cross-sectional view of the injection assembly, drainage assembly, and transmission assembly.

[0036] Figure 5 This is a schematic diagram of the internal structure of the steam injection assembly, drainage assembly, and transmission assembly after they have been cut open.

[0037] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0038] Explanation of reference numerals in the attached drawings: 1. Conveying assembly; 11. Processing table; 111. Mounting groove; 112. Connecting port; 113. Through port; 12. Connecting shaft; 13. Drive motor; 14. Roller; 15. Mounting base; 151. Discharge port; 152. Placement groove; 16. Fixed shaft; 17. Baffle plate; 181. Fixed plate; 182. Mounting block; 183. First drive cylinder; 184. Limiting plate; 2. Steam injection assembly; 21. Connecting block; 22. Second drive cylinder; 23. Push plate; 24. Steam spray bar; 241. Steam inlet; 242. Receiving cavity; 2421. Guide groove; 243. Steam nozzle; 244. Water outlet; 245. Drive port; 24 6. Overflow port; 25. Air spray bar; 251. Air inlet; 252. Air storage chamber; 253. Air jet nozzle; 26. Water outlet pipe; 261. Connecting port; 27. Ball valve; 3. Drainage assembly; 31. Baffle; 311. Sliding port; 312. Leakage port; 32. Positioning plate; 321. Positioning port; 33. Drive plate; 331. Annular groove; 34. Waterproof ring; 35. Shape memory alloy; 351. Fixing block; 36. First spring; 37. Sliding rod; 371. Guide surface; 381. Second rack; 382. Second gear; 39. Float; 391. Guide block; 4. Transmission assembly; 41. First rack; 411. Connecting rod; 42. First gear. Detailed Implementation

[0039] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0040] This application discloses a pretreatment device for corrugated paper to prevent tearing of the inner liner. (Refer to...) Figure 1 and Figure 2 The corrugated paper pretreatment device for preventing lining breakage includes a conveying assembly 1, a steam injection assembly 2, a drainage assembly 3, and a transmission assembly 4.

[0041] Reference Figure 1 and Figure 3 The conveying assembly 1 includes a processing table 11, a connecting shaft 12, a drive motor 13, rollers 14, a mounting base 15, a fixed shaft 16, a baffle plate 17, a fixing plate 181, a mounting block 182, a first drive cylinder 183, and a limit plate 184.

[0042] The lower end of the processing table 11 is fixedly connected to the ground. The lower end of the processing table 11 is provided with a mounting groove 111. The outer wall of the processing table 11 is provided with a connection port 112. The axis of the connection port 112 is parallel to the length direction of the processing table 11. There are three connection ports 112, and the three connection ports 112 are evenly spaced along the width direction of the processing table 11.

[0043] One end of the connecting shaft 12 is coaxially rotatably connected to the inner wall of the connecting port 112, and the other end of the connecting shaft 12 is rotatably connected to the groove wall of the mounting groove 111. The connecting shaft 12 extends out from the connecting port 112. The motor housing of the drive motor 13 is fixedly connected to the ground. The motor shaft of the drive motor 13 is connected to one connecting shaft 12 through a synchronous pulley and a synchronous belt. Adjacent connecting shafts 12 are connected to each other through synchronous pulleys and synchronous belts.

[0044] Reference Figure 1 and Figure 3 The upper end of the processing table 11 is provided with a through-hole 113, which is connected to the mounting groove 111. There are multiple through-holes 113, which are evenly spaced along the length and width of the processing table 11. The roller 14 is coaxially fixedly connected to the outer wall of the connecting shaft 12. The upper end of the roller 14 extends out of the through-hole 113. The roller 14 transports the cardboard by friction. There are multiple rollers 14, and each roller 14 is arranged in a one-to-one correspondence with the through-hole 113.

[0045] Along the length of the processing table 11, the mounting base 15 is fixedly connected to one end of the processing table 11. The mounting base 15 is provided with a discharge port 151. The discharge port 151 passes through the mounting base 15 along the width of the processing table 11. The inner wall of the discharge port 151 facing upward is flush with the upper end surface of the processing table 11.

[0046] Reference Figure 1 and Figure 3 The mounting base 15 has a placement groove 152 at one end facing the processing table 11. The two ends of the fixed shaft 16 are fixedly connected to the groove wall of the placement groove 152. The length direction of the fixed shaft 16 is parallel to the length direction of the processing table 11. The baffle plate 17 is fixedly connected to the end of the fixed shaft 16 facing the processing table 11. There are two baffle plates 17. The two baffle plates 17 are spaced apart along the length direction of the fixed shaft 16. The distance between the lower end of the baffle plate 17 and the upper end face of the processing table 11 is equal to the thickness of a piece of cardboard.

[0047] The fixing plate 181 is fixedly connected to the end of the fixing shaft 16 facing the processing table 11. There are two fixing plates 181, which are located on both sides of the baffle plate 17. The mounting block 182 is fixedly connected to the end of the fixing plate 181 away from the mounting seat 15. The cylinder body of the first driving cylinder 183 is fixedly connected to the mounting block 182. The piston rod of the first driving cylinder 183 is fixedly connected to the limiting plate 184. The two limiting plates 184 are located on both sides of the baffle plate 17. The limiting plates 184 are used to limit the stacked cardboard.

[0048] Reference Figure 1 and Figure 2 The steam injection assembly 2 includes a connecting block 21, a second drive cylinder 22, a push plate 23, a steam injection rod 24, an air injection rod 25, a water outlet pipe 26, and a ball valve 27.

[0049] The connecting block 21 is fixedly connected to the end of the mounting base 15 facing the processing table 11. The height of the connecting block 21 is greater than the height of the fixing plate 181. The cylinder body of the second driving cylinder 22 is slidably connected to the lower end of the connecting block 21. The sliding direction of the second driving cylinder 22 is parallel to the length direction of the processing table 11. The piston rod of the second driving cylinder 22 is fixedly connected to the push plate 23. The end of the push plate 23 away from the second driving cylinder 22 is used to abut against the end of the mounting base 15 facing the processing table 11. The lower end of the push plate 23 is fixedly connected to the upper end of the steam spray rod 24. The length direction of the steam spray rod 24 is vertical.

[0050] Reference Figure 1 and Figure 4 The air spray bar 25 is vertical in the length direction. There are two air spray bars 25. Along the width direction of the processing table 11, the two air spray bars 25 are fixedly connected to the two ends of the steam spray bar 24. The upper end of the steam spray bar 24 is provided with a steam inlet 241, which is connected to the steam generator. The steam spray bar 24 is provided with a receiving cavity 242, and the steam inlet 241 is connected to the receiving cavity 242. The upper end of the air spray bar 25 is provided with an air inlet 251, which is connected to the air outlet of the air pump. The air spray bar 25 is provided with an air storage cavity 252, and the air inlet 251 is connected to the air storage cavity 252.

[0051] Reference Figure 1 and Figure 5 The steam spray rod 24 has a steam nozzle 243 on the side away from the mounting base 15. The steam nozzle 243 is connected to the receiving cavity 242. There are multiple steam nozzles 243, and the multiple steam nozzles 243 are evenly spaced along the length direction of the steam spray rod 24.

[0052] Reference Figure 4 and Figure 5 The air spray bar 25 has a jet nozzle 253 on the side facing the cardboard. The jet nozzle 253 is connected to the air storage chamber 252. There are multiple jet nozzles 253, and the multiple jet nozzles 253 are evenly spaced along the length of the air spray bar 25.

[0053] Reference Figure 3 and Figure 6 The lower end of the steam spray rod 24 is provided with a water outlet 244, which is connected to the receiving cavity 242. The opening of the water outlet 244 faces the discharge port 151. The water outlet pipe 26 is fixedly connected to the inner wall of the water outlet 244. The upper end of the water outlet pipe 26 is provided with a connecting port 261. The ball valve 27 is rotatably connected to the water outlet pipe 26 and is used to control the opening and closing of the water outlet pipe 26. The rotation axis of the ball valve 27 is vertical, and the valve stem of the ball valve 27 extends out of the connecting port 261.

[0054] Reference Figure 6The drainage component 3 includes a baffle 31, a positioning plate 32, a drive plate 33, a waterproof ring 34, a shape memory alloy 35, a first spring 36, a sliding rod 37, a second rack 381, a second gear 382, ​​and a float 39.

[0055] Reference Figure 3 and Figure 6 The steam spray bar 24 has a drive port 245 on the outer wall facing the discharge port 151. The drive port 245 is located above the water outlet 244 and is connected to the receiving cavity 242. The baffle 31 and the positioning plate 32 are coaxially fixedly connected to the inner wall of the drive port 245. The distance from the baffle 31 to the ball valve 27 is greater than the distance from the positioning plate 32 to the ball valve 27. The drive plate 33 is located between the baffle 31 and the positioning plate 32. The outer periphery of the drive plate 33 is slidably connected to the inner wall of the drive port 245. The outer periphery of the drive plate 33 has an annular groove 331. The waterproof ring 34 is coaxially embedded in the annular groove 331. The outer wall of the waterproof ring 34 abuts against the inner wall of the drive port 245.

[0056] The baffle 31 is provided with a sliding port 311 and a drain port 312. The drain port 312 is used to connect the drive port 245 and the receiving cavity 242. One end of the shape memory alloy 35 is fixedly connected to the end of the drive plate 33 facing the baffle 31. The other end of the shape memory alloy 35 extends out of the sliding port 311 and is fixedly connected to a fixing block 351. The end of the fixing block 351 facing the drive plate 33 is used to abut against the end of the baffle 31 away from the drive plate 33.

[0057] Reference Figure 4 The transmission assembly 4 includes a first rack 41 and a first gear 42. The positioning plate 32 has a positioning opening 321. One end of the first rack 41 is fixedly connected to a connecting rod 411, which is fixedly connected to the end of the drive plate 33 facing the positioning plate 32. The connecting rod 411 slides within the positioning opening 321. A first spring 36 is sleeved on the outer periphery of the connecting rod 411. One end of the first spring 36 is fixedly connected to the end of the positioning plate 32 facing the drive plate 33, and the other end of the first spring 36 is fixedly connected to the end of the drive plate 33 facing the positioning plate 32. The first gear 42 is coaxially fixedly connected to the valve stem of the ball valve 27. The axis of the first gear 42 is vertical, and the first gear 42 meshes with the first rack 41.

[0058] Reference Figure 5 and Figure 6The outer wall of the steam spray rod 24 is provided with an overflow port 246, which is connected to the receiving cavity 242. The height of the overflow port 246 is greater than the height of the drive port 245 and less than the height of the steam injection port 243. The height of the upper end of the overflow port 246 is equal to the height of the lower end of the steam injection port 243. The sliding rod 37 is slidably connected to the inner wall of the overflow port 246. The second rack 381 is fixedly connected to the end of the sliding rod 37 away from the steam injection port 243. The second gear 382 is coaxially fixedly connected to the upper end of the first gear 42 and meshes with the second rack 381.

[0059] The inner wall of the receiving cavity 242 facing the steam injection port 243 is provided with a guide groove 2421. The guide groove 2421 is vertical in the length direction and is located between the overflow port 246 and the drive port 245. One end of the float 39 is connected to a guide block 391. The guide block 391 is slidably embedded in the guide groove 2421. The guide block 391 is a trapezoidal block and the guide groove 2421 is a trapezoidal groove. The sliding rod 37 is provided with a guide surface 371 at one end facing the float 39. The distance from the guide surface 371 to the second rack 381 increases with the increase of height.

[0060] The implementation principle of the corrugated paper pretreatment device for preventing tearing of the inner paper in this embodiment is as follows: Steam enters the receiving cavity 242 from the steam inlet 241 and liquefies into condensate upon encountering cold. The condensate collects at the bottom of the receiving cavity 242. When the shape memory alloy 35 detects a decrease in temperature, it contracts, pulling the drive plate 33 to slide. The first rack 41 slides, driving the first gear 42 to rotate. The ball valve 27 opens to discharge the condensate. When the shape memory alloy 35 comes into contact with water vapor, the higher temperature water vapor causes the shape memory alloy 35 to expand. The first spring... 36 restores the deformation and pulls the drive plate 33 to slide, so that the ball valve 27 is reset. When the condensate temperature is high, the shape memory alloy 35 does not deform and shrinks. When the condensate level reaches the float 39, the float 39 slides upward and pushes the sliding rod 37 to slide through the guide surface 371. The second rack 381 slides and drives the second gear 382 to rotate, so that the ball valve 27 rotates and discharges the condensate. When the water level drops, the float 39 drops and the ball valve 27 is reset until the condensate temperature drops and the shape memory alloy 35 shrinks and deforms to discharge the condensate.

[0061] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pretreatment device for corrugated paper to prevent tearing of the inner liner, characterized in that: The device includes a steam spray rod (24), a water outlet pipe (26), a ball valve (27), a shape memory alloy (35), and a transmission assembly (4). The steam spray rod (24) has a receiving cavity (242), a steam inlet (241) at its upper end, a steam nozzle (243) on the side of the steam spray rod (24) facing the cardboard, and a water outlet (244) at its lower end. The steam inlet (241), the steam nozzle (243), and the water outlet (244) are connected together. 4) All are connected to the receiving cavity (242), the water outlet pipe (26) is connected to the inner wall of the water outlet (244), the ball valve (27) is connected to the water outlet pipe (26) and is used to control the opening and closing of the water outlet pipe (26), one end of the shape memory alloy (35) is connected to the steam spray rod (24), the other end of the shape memory alloy (35) is connected to the transmission assembly (4), the transmission assembly (4) is connected to the ball valve (27), and the shape memory alloy (35) is used to control the rotation of the ball valve (27); The transmission assembly (4) includes a first gear (42) and a first rack (41). The first gear (42) is coaxially fixedly connected to the valve stem of the ball valve (27), and the first rack (41) is connected to the shape memory alloy (35). The first gear (42) meshes with the first rack (41). It also includes a baffle (31) and a drive plate (33). The outer wall of the steam spray rod (24) is provided with a drive port (245). The drive port (245) is connected to the receiving cavity (242). The baffle (31) is fixedly connected to the inner wall of the drive port (245). The drive plate (33) is located on the side of the baffle (31) away from the receiving cavity (242). The drive plate (33) is slidably connected to the inner wall of the drive port (245). One end of the shape memory alloy (35) is fixedly connected to the drive plate (33). The other end of the shape memory alloy (35) is connected to the baffle (31). The first rack (41) is fixedly connected to the end of the drive plate (33) away from the shape memory alloy (35). The shape memory alloy (35) deforms in the drive port (245) to push the drive plate (33) to move. It also includes a positioning plate (32), which is fixedly connected to the inner wall of the drive port (245). The positioning plate (32) is located on the side of the drive plate (33) away from the baffle (31). The positioning plate (32) has a positioning port (321), and the first rack (41) slides in the positioning port (321). It also includes a first spring (36), the baffle (31) is provided with a sliding opening (311), the end of the shape memory alloy (35) away from the drive plate (33) is slidably connected to the inner wall of the sliding opening (311), the end of the shape memory alloy (35) away from the drive plate (33) is fixedly connected to a fixing block (351), the end of the fixing block (351) facing the drive plate (33) is used to abut against the end of the baffle (31) away from the drive plate (33), the first spring (36) is provided in the drive opening (245), the first spring (36) is sleeved on the outer periphery of the first rack (41), one end of the first spring (36) is fixedly connected to the drive plate (33), and the other end of the first spring (36) is fixedly connected to the positioning plate (32). When the shape memory alloy (35) deforms and shortens, the first spring (36) is in a stretched state. It also includes a sliding rod (37), a float (39), a second rack (381), and a second gear (382).

2. The corrugated paper pretreatment device for preventing tearing of the inner liner as described in claim 1, characterized in that: It also includes a waterproof ring (34), and the outer periphery of the drive plate (33) is provided with an annular groove (331). The waterproof ring (34) is coaxially embedded in the annular groove (331), and the outer wall of the waterproof ring (34) abuts against the inner wall of the drive port (245).

3. The corrugated paper pretreatment device for preventing tearing of the inner liner as described in claim 1, characterized in that: The outer wall of the steam spray rod (24) is provided with an overflow port (246), which is connected to the receiving cavity (242). The sliding rod (37) is slidably connected to the inner wall of the overflow port (246), and the float (39) is slidably connected to the inner wall of the receiving cavity (242). The upper end of the float (39) is used to abut the lower end of the sliding rod (37). The sliding rod (37) is connected to the second rack (381), and the second gear (382) is coaxially fixedly connected to the first gear (42). The second gear (382) meshes with the second rack (381).

4. The corrugated paper pretreatment device for preventing tearing of the inner liner as described in claim 3, characterized in that: The inner wall of the receiving cavity (242) is provided with a guide groove (2421), and one end of the float (39) is connected to a guide block (391), which slides into the guide groove (2421).

5. The corrugated paper pretreatment device for preventing tearing of the inner liner as described in claim 3, characterized in that: The sliding rod (37) has a guide surface (371) at one end facing the float (39), and the distance from the guide surface (371) to the second rack (381) increases with the increase of height.

6. The corrugated paper pretreatment device for preventing tearing of the inner liner as described in claim 1, characterized in that: The steam injection port (243) is provided in multiple ways, and the multiple steam injection ports (243) are spaced apart along the length direction of the steam injection rod (24).

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