Vacuum low-temperature drying device for packaging bag

Abstract

The utility model provides a vacuum low-temperature drying device for packaging bags, which belongs to the technical field of packaging bag production and comprises a tunnel drying box, a vacuumizing component, a temperature control component and a microwave heating device, a cavity is formed in the tunnel drying box, an inlet and an outlet are respectively formed at two ends of the tunnel drying box, and an inner conveyor is arranged in the tunnel drying box. The vacuumizing assembly communicates with the tunnel drying box and is used for sucking air from the interior of the tunnel drying box, so that a negative pressure state is formed in the tunnel drying box; the temperature control assembly communicates with the tunnel drying box and is used for adjusting and controlling the internal environment temperature of the tunnel drying box. The microwave heating device is arranged at the top of the tunnel drying box and used for drying the packaging bags in the tunnel drying box or on the inner conveyor. The vacuum low-temperature drying device for the packaging bags has the technical effects that the packaging bags can be quickly dried, the production speed and efficiency are improved, and the packaging bags are not easy to blow away.

Description

Technical Field

[0001] The utility model belongs to the technical field of packaging bag production, and more specifically relates to a vacuum low-temperature drying device for packaging bags. Background Art

[0002] Packaging bags can be used to hold various media, such as building materials. There are various types of packaging bags on the market, including plastic packaging bags, paper packaging bags, paper-plastic composite packaging bags, etc. For example, paper packaging bags are usually bonded together at the bottom with adhesive to form a packaging bag with one end open and the other end sealed. After the packaging bag is produced, the adhesive on the packaging bag or the bottom of the packaging bag needs to be blown dry to ensure that the adhesive is firmly bonded and has a stable bonding effect.

[0003] In the prior art, the bottom of the packaging bag or the adhesive is usually dried by installing multiple blowers on the side of the conveyor belt used to transport the packaging bag, so that the blowers blow air toward the packaging bag or the bottom to dry the adhesive and the packaging bag, so that the adhesive is firmly attached to the bottom of the packaging bag. This operation method has a low drying speed for the packaging bag, which will affect the production efficiency of the packaging bag. The large amount of air blown by the blower may even blow the packaging bag away. Utility Model Content

[0004] The utility model aims to provide a vacuum low-temperature drying device for packaging bags, aiming to solve the technical problems that the drying operation of packaging bags in the prior art affects the production efficiency of packaging bags and the packaging bags are easily blown away.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a packaging bag vacuum low-temperature drying device, comprising:

[0006] A tunnel drying box, wherein a chamber is formed inside and an inlet and an outlet are formed at both ends respectively, and an internal conveyor is arranged inside the tunnel drying box, and the internal conveyor is used to convey the packaging bags to be dried from a direction close to the inlet to a direction close to the outlet;

[0007] A vacuum pumping component, connected to the tunnel drying box, is used to suck air from the interior of the tunnel drying box to form a negative pressure inside the tunnel drying box;

[0008] A temperature control component, connected to the tunnel drying box, for adjusting and controlling the internal ambient temperature of the tunnel drying box;

[0009] The microwave heating device is arranged on the top of the tunnel drying box and is used for drying the packaging bags in the tunnel drying box or on the inner conveyor.

[0010] In a possible implementation, it also includes a controller electrically connected to the inner conveyor, the vacuum pumping component, the temperature control component and the microwave heating device, respectively, and the controller is used to control the operation of the inner conveyor, the vacuum pumping component, the temperature control component and the microwave heating device respectively.

[0011] In a possible implementation, a plurality of clamping assemblies are arranged at equal intervals along the conveying direction on the inner conveyor, and the clamping assemblies are used to clamp the top of the packaging bag to be dried. The clamping assemblies move in a circulation manner with the circulation of the inner conveyor to circulate and dry the packaging bags.

[0012] In a possible implementation, the tunnel drying box is provided with a first extension conveyor near the entrance and a second extension conveyor near the exit, the inner conveyor, the first extension conveyor and the second extension conveyor all have an input end and an output end, the output end of the first extension conveyor extends into the entrance of the tunnel drying box and docks with the input end of the inner conveyor, the input end of the second extension conveyor extends into the exit of the tunnel drying box and docks with the output end of the inner conveyor, the packaging bag is placed at the input end of the first extension conveyor, and sequentially transitions to the inner conveyor and the second extension conveyor, the first extension conveyor, the inner conveyor and the second extension conveyor have the same transportation direction, speed and setting height.

[0013] In a possible implementation, the vacuum low-temperature drying equipment for packaging bags also includes a tray for supporting the packaging bags to be dried, and the tray is placed on a first extension conveyor. As the first extension conveyor conveys the bags, the tray can be transferred to the inner conveyor, and can be transferred from the inner conveyor to the second extension conveyor. The packaging bags are stacked on the tray.

[0014] In a possible implementation, a rotating table is provided at the bottom of the tray, the upper end of the rotating table is a rotating end, the rotating end has the freedom of circumferential rotation in a horizontal plane, the rotating table is placed on the first extension conveyor, the bottom of the tray is connected to the upper end of the rotating end and is used to rotate the packaging bag circumferentially by means of the rotation of the rotating table; the rotating table is connected to a control module, the control module is wirelessly communicated with the controller, and the controller has a control knob suitable for controlling the rotation angle of the rotating end of the rotating table.

[0015] In a possible implementation, a driver is respectively provided on the side of the tunnel drying box and near the entrance and the exit, and a cover plate is connected to the power output end of the driver, and the cover plate is used to cover the upper half of the entrance and the upper half of the exit, and the cover plate is located above the first extension conveyor and the second extension conveyor, and the driver is used to drive the cover plate to rotate toward or away from the entrance or the exit, and the driver is electrically connected to the controller and its operation is controlled by the controller, and the tunnel drying box is connected to a detector, and the detector is used to detect the moving position of the packaging bag, and the detector is electrically connected to the controller and sends a signal to the controller, and when the packaging bag passes through the entrance or the exit, the controller controls the cover plate to rotate in the direction away from the tunnel drying box to open the entrance or the exit.

[0016] In a possible implementation, a curtain is connected to the end of the cover plate away from the driver, and the curtain is arranged in a drooping shape and is used to cover the gap between the cover plate and the first extension conveyor or the second extension conveyor.

[0017] In a possible implementation, the vacuum assembly includes a vacuum pump located outside the tunnel drying box, a vacuum box located on the top of the outside of the tunnel drying box, and a plurality of vacuum pipes connected to the vacuum boxes at equal intervals in sequence. The vacuum pump is connected to the vacuum box, and the vacuum pipes extend into the interior of the tunnel drying box and are suitable for exhausting air. After exhausting air, negative pressure is formed inside the vacuum box, and the vacuum box is connected to a negative pressure gauge.

[0018] In a possible implementation, the temperature control component includes a thermometer disposed inside the tunnel drying box and an exhaust fan disposed inside the tunnel drying box and used to exhaust air toward the outside of the tunnel drying box. The thermometer and the exhaust fan are both electrically connected to the controller. The controller controls the operation of the exhaust fan and the microwave heating device respectively according to the temperature monitored by the thermometer to adjust the internal temperature of the tunnel drying box.

[0019] The beneficial effects of the vacuum low-temperature drying device for packaging bags provided by the utility model are as follows: compared with the prior art, the vacuum low-temperature drying device for packaging bags of the utility model comprises a tunnel drying box, a vacuum pumping component, a temperature control component and a microwave heating device; a chamber is formed inside the tunnel drying box and an inlet and an outlet are respectively formed at both ends; an internal conveyor is arranged inside the tunnel drying box, and the internal conveyor is used to convey the packaging bags to be dried from near the inlet to near the outlet; the vacuum pumping component is connected to the tunnel drying box and is used to suck air from the inside of the tunnel drying box so that a negative pressure is formed inside the tunnel drying box; the temperature control component is connected to the tunnel drying box and is used to adjust and control the internal ambient temperature of the tunnel drying box; the microwave heating device is arranged on the top of the tunnel drying box and is used to dry the packaging bags in the tunnel drying box or on the internal conveyor, thereby solving the technical problems that the drying operation speed of the packaging bags is slow, which affects the production efficiency of the packaging bags and the packaging bags are easily blown away, and has the technical effects of realizing quick drying of the packaging bags, improving production speed and efficiency, and not easily blowing away the packaging bags. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the three-dimensional structure of a vacuum low-temperature drying device for packaging bags provided in an embodiment of the utility model (the arrow in the figure indicates the transportation direction of the packaging bags);

[0022] Figure 2 A schematic diagram of the structure of the inner conveyor of the vacuum low-temperature drying device for packaging bags provided in an embodiment of the utility model (the arrow in the figure indicates the transportation direction of the packaging bags);

[0023] Figure 3 A schematic diagram of the structure of one of the clamping components on the inner conveyor of the packaging bag vacuum low-temperature drying device provided by an embodiment of the utility model;

[0024] Figure 4 A structural front view of a vacuum low-temperature drying device for packaging bags provided in an embodiment of the utility model (the arrow at the bottom of the figure indicates the transportation direction of the packaging bags, and the arrow at the top indicates the wind flow direction during ventilation);

[0025] Figure 5 for Figure 4 Schematic diagram of the exit structure of the tunnel drying box (the curved arrow in the figure indicates the direction of rotation or rotation of the cover plate, and the straight arrow indicates the direction of transportation of the packaging bag);

[0026] Figure 6 for Figure 5 Schematic diagram of the cover plate at the outlet after being rotated.

[0027] Description of reference numerals:

[0028] 1. Tunnel drying box; 11. Inlet; 12. Outlet; 13. Inner conveyor; 14. Clamping assembly; 15. Mounting hole; 16. Rope; 17. First extension conveyor; 18. Second extension conveyor; 19. Transition roller;

[0029] 2. Vacuum pump assembly; 21. Vacuum pump; 22. Vacuum box; 23. Vacuum pipe;

[0030] 3. Temperature control component; 31. Temperature meter; 32. Exhaust fan;

[0031] 4. Microwave heating device;

[0032] 5. Packaging bag; 6. Photovoltaic power supply component; 7. Robot; 8. Sterilization and disinfection component; 9. Controller; 10. Mobile terminal; 110. Tray; 120. Rotating table; 130. Drive; 140. Cover; 150. Detector; 160. Curtain. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] Please also read Figures 1 to 6 , the packaging bag vacuum low-temperature drying device provided by the utility model is now described. The packaging bag vacuum low-temperature drying device comprises a tunnel drying box 1, a vacuum pumping component 2, a temperature control component 3 and a microwave heating device 4. A chamber is formed inside the tunnel drying box 1 and an inlet 11 and an outlet 12 are formed at both ends. An internal conveyor 13 is arranged inside the tunnel drying box 1. The internal conveyor 13 is used to convey the packaging bag 5 to be dried from the direction near the inlet 11 to the direction near the outlet 12; the vacuum pumping component 2 is connected to the tunnel drying box 1 and is used to suck air from the inside of the tunnel drying box 1 to form a negative pressure inside the tunnel drying box 1; the temperature control component 3 is connected to the tunnel drying box 1 and is used to adjust and control the internal environmental temperature of the tunnel drying box 1; the microwave heating device 4 is arranged on the top of the tunnel drying box 1 and is used to dry the packaging bag 5 in the tunnel drying box 1 or on the internal conveyor 13.

[0035] Compared with the prior art, the vacuum and low-temperature drying device for packaging bags provided by the utility model can continuously dry the packaging bags 5 by using a vacuum and low-temperature tunnel drying box 1, with a fast drying speed and good effect, and solves the technical problems that the production efficiency of the packaging bags 5 will be affected and the packaging bags 5 will be easily blown away due to the slow drying operation speed, and the utility model has the technical effects of realizing quick drying of the packaging bags 5, improving the production speed and efficiency, and preventing the packaging bags 5 from being easily blown away.

[0036] The microwave heating device 4 in this embodiment adopts the existing technology product, which is arranged on the top of the tunnel drying box 1. Figure 1 Four groups are arranged in the tunnel drying box 1, the upper half of which is located on the outside of the tunnel drying box 1 and the lower half is located on the inside of the tunnel drying box 1, and can be heated by microwaves toward the inside of the tunnel drying box 1, thereby drying the packaging bag 5. The speed of microwave heating is relatively fast, thereby improving the drying rate of the packaging bag 5. The tunnel drying box 1 is a tunnel-type structure, with an inlet 11 at one end and an outlet 12 at the other end. The packaging bag 5 enters the inner conveyor 13 from the inlet 11. As the inner conveyor 13 is circulated, the packaging bag 5 moves in a straight line direction and is gradually heated and dried during the movement. The packaging bag 5 is dried in a vacuum and low-temperature environment, and the drying speed is fast, the efficiency is high, and the effect is good. The temperature control component 3 can control the internal temperature of the tunnel drying box 1, so that the interior is always in a low-temperature environment, such as below 22 degrees Celsius. An insulation layer is arranged on the inner wall of the tunnel drying box 1, which can prevent the internal heat from being transferred to the outside, thereby achieving the effect of energy saving and consumption reduction.

[0037] A photovoltaic power supply component 6 is provided on the outer wall of the tunnel drying box 1. The power output end of the photovoltaic power supply component 6 is electrically connected to the vacuum component 2, the inner conveyor 13, the temperature control component 3 and the microwave heating device 4, and is used to supply power respectively. This solves the technical problem of being able to supply power without affecting the normal operation of the equipment when there is no connection to the mains or a power outage. A manipulator 7 is provided on the outer side of the inlet 11 and the outlet 12 of the tunnel drying box 1. The manipulator 7 at the inlet 11 grabs the packaging bag 5 and places the packaging bag 5 on the inner conveyor 13. The manipulator 7 at the outlet 12 grabs the dried packaging bag 5 and takes it out from the inner conveyor 13. In this way, there is no need to manually operate the packaging bag 5, which improves the automation of the drying operation and the operating efficiency of drying the packaging bag 5.

[0038] A sterilization and disinfection component 8 is provided on the inner wall of the tunnel drying box 1 , and the sterilization and disinfection component 8 is used to sterilize and disinfect the air environment inside the tunnel drying box 1 to prevent the packaging bag 5 taken out from the tunnel drying box 1 from carrying bacteria and the like.

[0039] In order to realize the automatic control of the drying equipment of the utility model, in some embodiments, refer to Figures 1 to 6The vacuum low-temperature drying equipment for packaging bags also includes a controller 9 electrically connected to the inner conveyor 13, the vacuum assembly 2, the temperature control assembly 3 and the microwave heating device 4, respectively. The controller 9 is used to control the inner conveyor 13, the vacuum assembly 2, the temperature control assembly 3 and the microwave heating device 4 respectively. A plurality of control buttons are provided on the controller 9. By manipulating different control buttons, the inner conveyor 13, the vacuum assembly 2, the temperature control assembly 3 and the microwave heating device 4 can be controlled and operated respectively. If the temperature in the tunnel drying box 1 is controlled to be 22°C, the temperature inside the tunnel drying box 1 can be adjusted accordingly by controlling the temperature control assembly 3 and the microwave heating device 4.

[0040] Preferably, the controller 9 has a wireless communication unit, and the vacuum low-temperature drying equipment for packaging bags also includes a mobile terminal 10 wirelessly connected to the wireless communication unit, and the mobile terminal 10 is suitable for synchronously controlling the operation of the vacuum assembly 2, the temperature control assembly 3 and the microwave heating device 4 with the controller 9.

[0041] The wireless communication unit uses existing communication devices, such as 4G and other communication methods for wireless communication. The operation of the above-mentioned components and devices can be controlled on the mobile terminal 10, so there is no need to operate the controller 9, and the operation is controlled synchronously with the controller 9. The staff only needs to operate the mobile terminal 10 or the controller 9, and the mobile terminal 10 can be regarded as a remote control or a mobile phone. There is a display screen on the mobile terminal 10, which can display the current temperature value inside the tunnel drying box 1 and the negative pressure value generated by vacuuming.

[0042] When the packaging bag 5 is on the inner conveyor 13, in order to prevent the packaging bag 5 from moving or running away from the inner conveyor 13, in some embodiments, refer to Figures 1 to 6 A plurality of clamping assemblies 14 are arranged at equal intervals along the conveying direction on the inner conveyor 13. The clamping assemblies 14 are used to clamp the top of the packaging bag 5 to be dried. The clamping assemblies 14 are moved cyclically with the cyclic conveying of the inner conveyor 13 to cyclically dry the transfer bag. The clamping assemblies 14 are similar to a clamp in the prior art, which can clamp the top or opening of the packaging bag 5 without clamping the bottom with the adhesive. In this way, the packaging bag 5 can be heated and dried during or when the inner conveyor 13 is not conveying, thereby improving the drying speed and efficiency. The opening and closing of the clamping assemblies 14 can be operated by the above-mentioned manipulator 7 or by the operation of the staff. The packaging bag 5 is clamped in the closed state.

[0043] Specifically, a plurality of mounting holes 15 are provided on the belt of the inner conveyor 13 , and ropes 16 are passed through the mounting holes 15 . The ropes 16 can be used to bind the clamping assembly 14 , so that the clamping assembly 14 is fixed on the belt.

[0044] In some embodiments, see Figures 1 to 6 The tunnel drying box 1 is provided with a first extension conveyor 17 near the entrance 11 and a second extension conveyor 18 near the exit 12. The inner conveyor 13, the first extension conveyor 17 and the second extension conveyor 18 all have an input end and an output end. The output end of the first extension conveyor 17 extends into the entrance 11 of the tunnel drying box 1 and docks with the input end of the inner conveyor 13. The input end of the second extension conveyor 18 extends into the exit 12 of the tunnel drying box 1 and docks with the output end of the inner conveyor 13. The packaging bag 5 is placed at the input end of the first extension conveyor 17 and sequentially transitions to the inner conveyor 13 and the second extension conveyor 18. The transportation direction, speed and setting height of the first extension conveyor 17, the inner conveyor 13 and the second extension conveyor 18 are the same. When in use, the packaging bag 5 is clamped by using the manipulator 7 and placed on the first extension conveyor 17. The length of the first extension conveyor 17 is 2 meters, the length of the inner conveyor 13 and the second extension conveyor 18 are both 10 meters, and the length of the tunnel drying box 1 is approximately greater than 10 meters, or 11 meters. The first extension conveyor 17, the inner conveyor 13 and the second extension conveyor 18 have the same structure, which all include belts, driving rollers, driven rollers and motors, etc. The belts are wrapped around the driving rollers and the driven rollers, and the power output end of the motor is connected to the driving roller and drives the rotation. The ends of the driving roller and the driven roller are connected with brackets, which are erected on the bottom of the tunnel drying box 1 or on the ground outside the tunnel drying box 1. Through the rotation of the driving roller, the belt realizes a circular transmission, and the packaging bag 5 is located on the belt, realizing the movement of the packaging bag 5. In order to prevent the packaging bag 5 from being unable to be normally conveyed or transferred to the inner conveyor 13 due to the poor transition at the docking position between the first extension conveyor 17 and the inner conveyor 13, a transition roller 19 can be provided between the first extension conveyor 17 and the inner conveyor 13. The transition roller 19 is a freely rotatable roller without power, so that the packaging bag 5 output from the first extension conveyor 17 can be transferred to the transition roller 19, and the packaging bag 5 can be transferred to the inner conveyor 13 through the friction between the inner conveyor 13 and the packaging bag 5. Similarly, a transition roller 19 is also provided between the inner conveyor 13 and the second extension conveyor 18.

[0045] When multiple packaging bags 5 need to be dried, the multiple packaging bags 5 are stacked. In some embodiments, refer to Figures 1 to 6The vacuum low-temperature drying equipment for packaging bags also includes a tray 110 for supporting the packaging bags 5 to be dried. The tray 110 is placed on the first extension conveyor 17. With the conveyance of the first extension conveyor 17, it can transition to the inner conveyor 13, and can transition from the inner conveyor 13 to the second extension conveyor 18. The packaging bags 5 are stacked on the tray 110. The tray 110 adopts the existing technology product, and its upper end is square in the top view. Multiple packaging bags 5 are stacked on the tray 110. The manipulator 7 places the tray 110 on the first extension conveyor 17 or the inner conveyor 13. In this way, multiple packaging bags 5 are dried in the tunnel drying box 1, which is conducive to improving the drying efficiency. The length and width of the packaging bag 5 should be smaller than the length of the tray 110.

[0046] In order to achieve uniform heating and drying of the packaging bag 5, in some embodiments, refer to Figures 1 to 6 , a rotating table 120 is arranged at the bottom of the tray 110, the upper end of the rotating table 120 is a rotating end, and the rotating end has the freedom of circumferential rotation in the horizontal plane, the rotating table 120 is placed on the first extension conveyor 17, the bottom of the tray 110 is connected to the upper end of the rotating end and is used to rotate the packaging bag 5 in the circumferential direction by means of the rotation of the rotating table 120; the rotating table 120 is connected to a control module, the control module is wirelessly connected to the controller 9, and the controller 9 has a control knob suitable for controlling the rotation angle of the rotating end of the rotating table 120. The rotating table 120 is an electric rotating table 120 in the prior art, which is made of high temperature resistant material, can withstand the high temperature inside the tunnel drying box 1, and ensures that it does not deform or affect the normal operation of the rotation. The control module is a prior art module or electronic device, and the control module and the controller 9 both have a wireless communication unit. The operation of the rotating table 120 can be controlled by the control knob on the controller 9, and then the rotation angle or orientation of the packaging bag 5 can be controlled, so that the drying degree or uniformity of the packaging bag 5 can be controlled. During the conveying process of the conveyor, the packaging bag 5 can be simultaneously moved linearly and rotated in a circular motion by the rotation of the rotating end, thereby accelerating the drying speed and improving the drying effect.

[0047] Specifically, the rotating platform 120 is in a pancake shape or a disc shape, and its diameter is smaller than the width of the belt, and the length of the tray 110 is also smaller than the width of the belt.

[0048] In some embodiments, see Figures 1 to 6A driver 130 is respectively provided on the side of the tunnel drying box 1 and near the inlet 11 and the outlet 12. The power output end of the driver 130 is connected to a cover plate 140. The cover plate 140 is used to cover the upper half of the inlet 11 and the upper half of the outlet 12. The cover plate 140 is located above the first extension conveyor 17 and the second extension conveyor 18. The driver 130 is used to drive the cover plate 140 to rotate in a direction close to or away from the inlet 11 or the outlet 12. The driver 130 is electrically connected to the controller 9 and its operation is controlled by the controller 9. The tunnel drying box 1 is connected to a detector 150. The detector 150 is used to detect the moving position of the packaging bag 5. The detector 150 is electrically connected to the controller 9 and sends a signal to the controller 9. When the packaging bag 5 passes through the inlet 11 or the outlet 12, the controller 9 controls the cover plate 140 to rotate in a direction away from the tunnel drying box 1 to open the inlet 11 or the outlet 12. The driver 130 is a motor, fixedly connected to the side wall of the tunnel drying box 1, and its power output end is connected to the cover plate 140. Since the inlet 11 and the outlet 12 are both rectangular, the shape of the cover plate 140 matches the shape of the inlet 11 or the outlet 12, and is also rectangular, but the cover plate 140 only covers the upper half of the inlet 11 and the outlet 12, and the lower half is used to install the first extension conveyor 17 and the second extension conveyor 18, so that the cover plate 140 cannot affect the normal operation of the above conveyors. The detector 150 is a sensor, such as a proximity sensor, an infrared sensor, etc., which detects the position of the packaging bag 5. When the packaging bag 5 is about to approach the inlet 11 or the outlet 12, the detector 150 sends a signal to the controller 9, and the controller 9 sends a signal to the driver 130, thereby controlling the operation of the driver 130 to rotate the cover plate 140 to open the inlet 11 or the outlet 12. In this way, the inlet 11 or the outlet 12 can be semi-closed when there is no packaging bag 5, and the normal transportation of the packaging bag 5 can be not affected when there is a packaging bag 5, thereby ensuring the normal drying operation of the packaging bag 5 and improving the drying efficiency.

[0049] To further prevent the heat inside the tunnel drying box 1 from overflowing or escaping from the inlet 11 or the outlet 12, in some embodiments, refer to Figures 1 to 6The end of the cover plate 140 away from the driver 130 is connected with a curtain 160, which is arranged in a drooping shape and is used to cover the gap between the cover plate 140 and the first extension conveyor 17 or the second extension conveyor 18. The curtain 160 is flexible, and when the cover plate 140 rotates, the curtain 160 also droops. For example, when the cover plate 140 rotates, if there are packaging bags 5 being conveyed on the first extension conveyor 17 or the second extension conveyor 18, the curtain 160 will not affect or contact the packaging bags 5. When there are no packaging bags 5, the cover plate 140 is arranged in a vertical shape, and the curtain 160 also droops and can fall on the first extension conveyor 17 or the second extension conveyor 18, so that the above-mentioned gap can be covered to the maximum extent, and the heat inside the tunnel drying box 1 can be minimized from overflowing.

[0050] The above-mentioned curtain 160 and cover plate 140 are both made of high temperature resistant materials. Similarly, the cover plate 140 and curtain 160 are both made of transparent materials, so that the internal situation of the tunnel drying box 1 can be seen through the cover plate 140 or the curtain 160 from the outside.

[0051] In some embodiments, see Figures 1 to 6The vacuum pump 2 includes a vacuum pump 21 located outside the tunnel drying box 1, a vacuum box 22 located at the top of the outside of the tunnel drying box 1, and a plurality of vacuum pipes 23 connected to the vacuum box 22 at equal intervals. The vacuum pump 21 is connected to the vacuum box 22, and the vacuum pipe 23 extends into the interior of the tunnel drying box 1 and is suitable for exhausting air. After exhausting air, a negative pressure is formed inside the vacuum box 22. The vacuum box 22 is connected to a negative pressure gauge. The vacuum pump 21 adopts an existing technology product, which can exhaust air and generate negative pressure, so a negative pressure will be formed in the vacuum box 22. The size of the negative pressure can be adjusted by the vacuum pump 21. The vacuum box 22 is in the shape of a rectangular parallelepiped. Through a plurality of vacuum pipes 23 extending into the interior of the tunnel drying box 1, the air inside the tunnel drying box 1 can be sucked. In actual operation, the inlet 11 and the outlet 12 can be closed to make the interior of the tunnel drying box 1 closed. In this way, the vacuum pump 2 can form a negative pressure inside the tunnel drying box 1, which is conducive to improving the drying effect of the bag transfer bag. It should be noted that the sealing of the inlet 11 and the outlet 12 can be carried out by using a board in the prior art. After the packaging bag 5 is fed to the inner conveyor 13, the cap is then sealed, and then the vacuum assembly 2, the microwave heating device 4 and the inner conveyor 13 are opened. After waiting for a period of time, or when the packaging bag 5 is located at the output end of the inner conveyor 13, the operation of the inner conveyor 13 is stopped. At this time, the board can be removed, the outlet 12 can be opened, the operation of the vacuum assembly 2 can be stopped, and finally the packaging bag 5 can be taken out. It should be noted that, under the premise of not using the first extension conveyor 17 and the second extension conveyor 18, the use of the vacuum assembly 2 can form a negative pressure in the tunnel drying box 1. After using the first extension conveyor 17 and the second extension conveyor 18, the vacuum assembly 2 can also be used, so that the negative pressure cannot be formed inside the tunnel drying box 1, and the drying effect of the packaging bag 5 will not be affected. The manipulator 7 can place the tray 110 or the rotating table 120 directly on the inner conveyor 13 (provided that the packaging bags 5 are stacked on the tray 110 or the tray 110 connected to the rotating table 120), and then seal the cover plate 140 to form a closed state inside the tunnel drying box 1, and then open the negative pressure pumping component to form a negative pressure state. The function of the multiple equally spaced vacuum tubes 23 is to make the negative pressure values ​​of each space inside the tunnel drying box 1 consistent, that is, to keep the negative pressure uniform. The length direction of the vacuum box 22 is along the length direction of the tunnel drying box 1, so that the negative pressure inside the tunnel drying box 1 is pumped at the same time, so that the negative pressure values ​​of each position or area inside remain uniform, which is convenient for improving the drying effect of the packaging bags.

[0052] In some embodiments, see Figures 1 to 6The temperature control component 3 includes a temperature meter 31 disposed inside the tunnel drying box 1 and an exhaust fan 32 disposed inside the tunnel drying box 1 and used to exhaust air toward the outside of the tunnel drying box 1. The temperature meter 31 and the exhaust fan 32 are both electrically connected to the controller 9. The controller 9 controls the exhaust fan 32 and the microwave heating device 4 to operate according to the temperature monitored by the temperature meter 31, so as to adjust the temperature inside the tunnel drying box 1. The temperature is detected by the temperature meter 31 and fed back to the controller 9. The controller 9 has a display that can display the temperature. The current temperature can be displayed on the display. The staff can control the operation of the exhaust fan 32 or the microwave heating device 4 according to the temperature value to achieve temperature adjustment. Only running the exhaust fan 32 can discharge the high-temperature heat inside the tunnel drying box 1 to the outside, thereby achieving the function of cooling. Only running the microwave heating device 4 can increase the heat inside the tunnel drying box 1 and increase the temperature, thereby achieving the function of heating.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A packaging bag vacuum low-temperature drying device, characterized in that: include: A tunnel drying box, wherein a chamber is formed inside and an inlet and an outlet are formed at both ends respectively, and an internal conveyor is arranged inside the tunnel drying box, and the internal conveyor is used to convey the packaging bags to be dried from a direction close to the inlet to a direction close to the outlet; A vacuum pumping component, connected to the tunnel drying box, is used to suck air from the interior of the tunnel drying box to form a negative pressure inside the tunnel drying box; A temperature control component, connected to the tunnel drying box, for adjusting and controlling the internal ambient temperature of the tunnel drying box; The microwave heating device is arranged on the top of the tunnel drying box and is used for drying the packaging bags in the tunnel drying box or on the inner conveyor.

2. The packaging bag vacuum low-temperature drying device according to claim 1, characterized in that: It also includes a controller electrically connected to the inner conveyor, the vacuum pumping component, the temperature control component and the microwave heating device, respectively, and the controller is used to control the operation of the inner conveyor, the vacuum pumping component, the temperature control component and the microwave heating device respectively.

3. The packaging bag vacuum low-temperature drying device according to claim 1, characterized in that: A plurality of clamping assemblies are arranged at equal intervals on the inner conveyor along the conveying direction. The clamping assemblies are used to clamp the top of the packaging bag to be dried. The clamping assemblies move cyclically with the cyclic conveying of the inner conveyor to cyclically dry the packaging bag.

4. The packaging bag vacuum low-temperature drying device according to claim 2, characterized in that: The tunnel drying box is provided with a first extension conveyor near the entrance and a second extension conveyor near the exit. The inner conveyor, the first extension conveyor and the second extension conveyor all have an input end and an output end. The output end of the first extension conveyor extends into the entrance of the tunnel drying box and docks with the input end of the inner conveyor. The input end of the second extension conveyor extends into the exit of the tunnel drying box and docks with the output end of the inner conveyor. The packaging bag is placed at the input end of the first extension conveyor and sequentially transitions to the inner conveyor and the second extension conveyor. The first extension conveyor, the inner conveyor and the second extension conveyor have the same transportation direction, speed and setting height.

5. The packaging bag vacuum low-temperature drying device according to claim 4, characterized in that: The vacuum low-temperature drying equipment for packaging bags also includes a tray for supporting the packaging bags to be dried. The tray is placed on the first extension conveyor. As the first extension conveyor conveys the bags, the tray can be transferred to the inner conveyor, and can be transferred from the inner conveyor to the second extension conveyor. The packaging bags are stacked on the tray.

6. The packaging bag vacuum low-temperature drying device according to claim 5, characterized in that: A rotating table is provided at the bottom of the tray, the upper end of the rotating table is a rotating end, and the rotating end has the freedom of circumferential rotation in a horizontal plane. The rotating table is placed on the first extension conveyor, and the bottom of the tray is connected to the upper end of the rotating end and is used to rotate the packaging bag circumferentially by means of the rotation of the rotating table; the rotating table is connected to a control module, and the control module is wirelessly communicated with the controller, and the controller has a control knob suitable for controlling the rotation angle of the rotating end of the rotating table.

7. The packaging bag vacuum low-temperature drying device according to claim 4, characterized in that: A driver is respectively provided on the side of the tunnel drying box and near the inlet and the outlet, and a cover plate is connected to the power output end of the driver, and the cover plate is used to cover the upper half of the inlet and the upper half of the outlet, and the cover plate is located above the first extension conveyor and the second extension conveyor. The driver is used to drive the cover plate to rotate in a direction close to or away from the inlet or the outlet, and the driver is electrically connected to the controller and its operation is controlled by the controller. The tunnel drying box is connected to a detector, and the detector is used to detect the moving position of the packaging bag. The detector is electrically connected to the controller and sends a signal to the controller. When the packaging bag passes through the inlet or the outlet, the controller controls the cover plate to rotate in a direction away from the tunnel drying box to open the inlet or the outlet.

8. The packaging bag vacuum low-temperature drying device according to claim 7, characterized in that: A curtain is connected to the end of the cover plate away from the driver. The curtain is arranged in a drooping shape and is used to cover the gap between the cover plate and the first extension conveyor or the second extension conveyor.

9. The packaging bag vacuum low-temperature drying device according to claim 1, characterized in that: The vacuum pump assembly includes a vacuum pump located outside the tunnel drying box, a vacuum box located on the top of the outside of the tunnel drying box, and a plurality of vacuum tubes connected to the vacuum boxes at equal intervals in sequence. The vacuum pump is connected to the vacuum box, and the vacuum tubes extend into the interior of the tunnel drying box and are suitable for exhausting air. After exhausting air, negative pressure is formed inside the vacuum box, and the vacuum box is connected to a negative pressure gauge.

10. The packaging bag vacuum low-temperature drying device according to claim 2, characterized in that: The temperature control component includes a temperature meter arranged inside the tunnel drying box and an exhaust fan arranged inside the tunnel drying box and used to exhaust air toward the outside of the tunnel drying box. The temperature meter and the exhaust fan are both electrically connected to the controller. The controller controls the operation of the exhaust fan and the microwave heating device respectively according to the temperature monitored by the temperature meter to adjust the internal temperature of the tunnel drying box.

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