Air-cooled printing napkin drying equipment

Abstract

The utility model discloses air-cooled printing napkin drying equipment which comprises a tunnel dryer, a conveying roller, a driving unit and a wind power heat dissipation unit, a plurality of air outlets in the tunnel dryer are all connected with a main pipe with an air extracting pump, and the air-cooled printing napkin drying equipment further comprises a driving unit and a wind power heat dissipation unit. The driving unit converts heat energy into kinetic energy for driving the wind power heat dissipation unit to generate wind power through hot air exhausted by the main pipe, and then the dried printed napkins are cooled. Through the driving unit and the wind power heat dissipation unit, heat energy is converted into kinetic energy for driving the wind power heat dissipation unit to generate wind power through hot air exhausted by the main pipe, and then the dried printed napkins are cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of napkin production, in particular to an air-cooled printing napkin drying device. Background Technique

[0002] The ink printing process of printed napkins refers to the process of forming patterns or colors on napkins through specific ink printing techniques. After the ink printing is completed, the printed napkins need to be dried. The purpose is to accelerate the volatilization of solvents through drying, so that the pigments and resins in the ink are cured, forming solid particles and adhering to the surface of the printed matter. Drying ensures that the ink forms a uniform and smooth coating on the surface of the napkin, avoiding color bleeding and pattern blurring, thereby improving the quality of the printed matter.

[0003] Currently, the existing method of drying printed napkins using a tunnel dryer generally controls the drying temperature at 80°C to 120°C. During drying, the generated hot moisture is pumped out by an air extraction pump and discharged outdoors while drying. Due to air flow and heat conduction, part of the heat will return to the room, resulting in an increase in room temperature. Especially in summer, in order to maintain the temperature balance in the workshop, air conditioners need to be turned on for cooling, resulting in increased power consumption. Moreover, the dried printed napkins have a relatively high temperature, which is likely to cause burns to operators and increase the fire risk due to the accumulation of napkins. Therefore, this application provides an air-cooled printing napkin drying device to meet the requirements. Content of the Utility Model

[0004] The purpose of this application is to provide an air-cooled printing napkin drying device to solve the technical problems mentioned in the above background.

[0005] To achieve the above purpose, this application provides the following technical solution: An air-cooled printing napkin drying device includes a tunnel dryer and conveying rollers. Multiple air outlets on the tunnel dryer are all connected to a main pipe with an air extraction pump, and further includes a driving unit and a wind heat dissipation unit;

[0006] The driving unit includes a heat preservation barrel installed at the upper end of the tunnel dryer. The heat preservation barrel is connected to the main pipe through an intake branch pipe. The inner cavity of the heat preservation barrel is hermetically provided with a heat-conducting hollow column, and the inner cavity of the heat-conducting hollow column is filled with a low-boiling liquid. The outer wall and the top of the heat preservation barrel are respectively provided with a side air outlet pipe and an upper air outlet pipe. The upper air outlet pipe communicates with the inner cavity of the heat-conducting hollow column. A heating cavity is formed between the inner wall of the heat preservation barrel and the outer wall of the heat-conducting hollow column. The upper end of the upper air outlet pipe is connected to a hollow cylinder;

[0007] An exhaust pipe is provided on the hollow cylinder. The inner cavity of the exhaust pipe communicates with the inner cavity of the upper air outlet pipe through a flow channel. A vertical plate is fixed in the inner cavity of the hollow cylinder. The vertical plate is slidably penetrated by a movable rod. The left end of the movable rod is slidably arranged in the inner cavity of the upper air outlet pipe. An elastic sealing ring is fixedly sleeved on the left end of the movable rod. A second magnet is fixed to the right end of the movable rod. A first magnet is arranged at a position on the inner wall of the hollow cylinder opposite to the second magnet. The opposite ends of the first magnet and the second magnet have opposite magnetic poles. A baffle is fixedly sleeved on the movable rod. A compression spring is fixedly installed between the baffle and the vertical plate. A rack is fixed to the lower end of the baffle. The right end of the rack slidably penetrates the vertical plate. The rack is in tooth engagement with a gear on a driving shaft rotatably and sealingly arranged. The lower end of the driving shaft is located outside the hollow cylinder. The lower end of the driving shaft is meshed with a screw through a gear. The screw is installed on a bracket. The lower end of the screw is located in the threaded cavity of the column. The column is slidably arranged on the bracket. The bracket is installed on the piston cylinder. The lower end of the column is fixed to the piston. The piston is sealingly and slidably arranged in the inner cavity of the piston cylinder. A liquid inlet pipe and a liquid discharge pipe are respectively arranged at the side end and the bottom of the piston cylinder. A liquid inlet one-way valve and a liquid discharge one-way valve are respectively arranged on the liquid inlet pipe and the liquid discharge pipe. The lower end of the liquid inlet pipe penetrates the upper end of the heat conduction box and extends to the bottom of the inner cavity of the heat conduction box. The heat conduction box is located underground and seals the placement opening on the ground through a heat preservation board. The hollow cylinder communicates with the inner cavity of the heat conduction box through a guide pipe. The liquid discharge pipe communicates with the inner cavity of the heat conduction hollow column;

[0008] It further includes a U-shaped toothed rod slidably arranged on the limiting plate. An extrusion inclined surface is arranged on the left lower end of the U-shaped toothed rod. The U-shaped toothed rod is in tooth engagement with a tooth column through a rotatably arranged transmission gear. The lower end of the tooth column is fixed to an elastic diaphragm. The elastic diaphragm is sealingly installed in the inner cavity of an installation groove provided inside the hollow cylinder;

[0009] The wind power heat dissipation unit includes N installation cylinders arranged in a straight line. Adjacent two installation cylinders are connected through a connecting pipe. A rotating shaft is rotatably and sealingly arranged on the installation cylinder. A plurality of bowl-shaped wind catchers are arranged in a circumferential manner on the rotating shaft. A heat dissipation fan blade is installed at the lower end of the rotating shaft. An air inlet pipe is arranged on the outer wall of the installation cylinder close to the exhaust pipe. The air inlet pipe is connected with the exhaust pipe. The outer wall of the installation cylinder far from the exhaust pipe communicates with the inner cavity of the heat conduction box through a guide pipe;

[0010] An air outlet branch pipe is further arranged on the main pipe. Valves are arranged on the air outlet branch pipe and the two air inlet branch pipes;

[0011] A stop strip is arranged on the inner wall of the hollow cylinder. The stop strip is located in the U-shaped cavity of the U-shaped toothed rod.

[0012] As a preferred implementation manner in this embodiment, a magnetic isolation mechanism is further included. When the baffle moves in place and is blocked and limited by the U-shaped tooth bar under the magnetic force action of the first magnet and the second magnet, the first magnet is shielded by the magnetic isolation mechanism to release the magnetic force action between the first magnet and the second magnet.

[0013] As a preferred implementation manner in this embodiment, the magnetic isolation mechanism includes a tooth plate installed at the right end of the movable rod, a rotating column rotatably arranged in the inner cavity of the hollow cylinder, and an L-shaped sliding rod. The lower end of the rotating column is in tooth connection with the tooth plate through a one-way gear. A spiral rising chute is arranged on the rotating column, and the head and tail ends of the chute are connected through a vertical cavity. One end of the L-shaped sliding rod is slidably arranged in the vertical cavity, and a magnetic isolation shielding plate is fixedly arranged at the other end of the L-shaped sliding rod. The two side ends of the magnetic isolation shielding plate are slidably arranged in U-shaped grooves arranged on the inner wall of the hollow cylinder.

[0014] In summary, the technical effects and advantages of the present utility model are as follows:

[0015] The structure of the present utility model is reasonable. Through the driving unit and the wind power heat dissipation unit, the heat energy is converted into the kinetic energy that drives the wind power heat dissipation unit to generate wind by using the hot air discharged from the main pipe, and then the dried printed napkins are cooled.

[0016] In the present utility model, a magnetic isolation mechanism is provided, which is beneficial to the subsequent compression spring to drive the movable rod to quickly return to its original position, and is beneficial to pressing the low-boiling liquid to the heat-conducting hollow column through the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the installation structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 3 For Figure 2 the partial enlarged structure schematic diagram in

[0021] Figure 4 For Figure 3 the cross-section and partial enlarged structure schematic diagram of the hollow cylinder in

[0022] Figure 5 is Figure 3 the schematic cross-sectional structure diagram of the heat preservation barrel in

[0023] Figure 6 is Figure 2 the schematic structure diagram of the wind cooling unit in

[0024] Figure 7 is Figure 4 the schematic structure diagram of the magnetic isolation mechanism in

[0025] Figure 8 is Figure 7 the schematic right view structure diagram of the rotating column in

[0026] In the figure: 1. Tunnel dryer; 2. Main pipe; 3. Exhaust pump; 4. Conveyor roller; 5. Heat conduction box; 6. Heat preservation board; 7. Driving unit; 71. Heat preservation barrel; 72. Side air outlet pipe; 73. Intake branch pipe; 74. Heat conduction hollow column; 75. Upper air outlet pipe; 76. Hollow cylinder; 77. Flow channel; 78. Exhaust pipe; 79. Vertical plate; 710. Movable rod; 711. Elastic sealing ring; 712. Compression spring; 713. Baffle; 714. U-shaped tooth bar; 715. Limit plate; 716. Extrusion inclined plane; 717. Transmission gear; 718. Tooth column; 719. Elastic diaphragm; 720. Installation groove; 721. Rack; 722. Driving shaft; 723. Air guide pipe; 724. Piston cylinder; 725. Bracket; 726. Screw; 727. Driving gear; 728. Column; 729. Liquid inlet pipe; 730. Piston; 731. Liquid discharge pipe; 8. Wind cooling unit; 81. Installation cylinder; 82. Intake pipe; 83. Rotating shaft; 84. Wind catcher; 85. Connecting pipe; 86. Diversion pipe; 9. Magnetic isolation mechanism; 91. Tooth plate; 92. Rotating column; 93. L-shaped sliding rod; 94. U-shaped groove; 95. Magnetic isolation shielding plate; 96. Slideway; 97. Vertical cavity; 98. One-way gear; 10. Air outlet branch pipe; 11. First pressure gauge; 12. Second pressure gauge; 13. Y-shaped pipe; 14. First magnet; 15. Second magnet; 16. Stop bar. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment: Refer to Figures 1-6An air-cooled printing napkin drying device shown in the figure includes a tunnel dryer 1 and conveying rollers 4. A plurality of air outlets on the tunnel dryer 1 are all connected to a main pipe 2 with an air extraction pump 3. It also includes a driving unit 7 and a wind heat dissipation unit 8;

[0029] The driving unit 7 includes a heat preservation barrel 71 installed at the upper end of the tunnel dryer 1. The heat preservation barrel 71 is connected to the main pipe 2 through an intake branch pipe 73. A heat-conducting hollow column 74 is hermetically arranged in the inner cavity of the heat preservation barrel 71, and a low-boiling-point liquid is filled in the inner cavity of the heat-conducting hollow column 74. A side air outlet pipe 72 and an upper air outlet pipe 75 are respectively arranged on the outer side wall and the top end of the heat preservation barrel 71. The upper air outlet pipe 75 communicates with the inner cavity of the heat-conducting hollow column 74. A heating cavity is formed between the inner wall of the heat preservation barrel 71 and the outer wall of the heat-conducting hollow column 74. The upper end of the upper air outlet pipe 75 is connected to a hollow cylinder 76;

[0030] An exhaust pipe 78 is arranged on the hollow cylinder 76. The inner cavity of the exhaust pipe 78 communicates with the inner cavity of the upper air outlet pipe 75 through a flow channel 77. A vertical plate 79 is fixed in the inner cavity of the hollow cylinder 76. The vertical plate 79 is slidably penetrated by a movable rod 710. The left end of the movable rod 710 is slidably arranged in the inner cavity of the upper air outlet pipe 75. An elastic sealing ring 711 is fixedly sleeved on the left end of the movable rod 710. A second magnet 15 is fixed to the right end of the movable rod 710. A first magnet 14 is arranged at a position on the inner wall of the hollow cylinder 76 opposite to the second magnet 15. The opposite ends of the first magnet 14 and the second magnet 15 have opposite magnetic poles. A baffle 713 is fixedly sleeved on the movable rod 710, and a compression spring 712 is fixedly installed between the baffle 713 and the vertical plate 79. A rack 721 is fixed to the lower end of the baffle 713, and the right end of the rack 721 slidably penetrates the vertical plate 79. The rack 721 is in tooth engagement with a gear on a driving shaft 722 rotatably arranged in a sealed manner, and the lower end of the driving shaft 722 is located outside the hollow cylinder 76. The lower end of the driving shaft 722 is meshed with a screw rod 726 through a gear. The screw rod 726 is installed on a bracket 725. The lower end of the screw rod 726 is located in the threaded cavity of a column 728. The column 728 is slidably arranged on the bracket 725. The bracket 725 is installed on a piston cylinder 724. The lower end of the column 728 is fixed to a piston 730, and the piston 730 is hermetically slidably arranged in the inner cavity of the piston cylinder 724. A liquid inlet pipe 729 and a liquid discharge pipe 731 are respectively arranged on the side end and the bottom of the piston cylinder 724. A liquid inlet one-way valve and a liquid discharge one-way valve are respectively arranged on the liquid inlet pipe 729 and the liquid discharge pipe 731. The lower end of the liquid inlet pipe 729 penetrates the upper end of a heat-conducting box 5 and extends to the bottom of the inner cavity of the heat-conducting box 5. The heat-conducting box 5 is located underground and seals a placement opening arranged on the ground through a heat preservation board 6. The hollow cylinder 76 communicates with the inner cavity of the heat-conducting box 5 through a guide pipe 723. The liquid discharge pipe 731 communicates with the inner cavity of the heat-conducting hollow column 74;

[0031] It further includes a U-shaped tooth bar 714 slidably arranged on a limit plate 715. An extrusion inclined surface 716 is arranged at the lower left end of the U-shaped tooth bar 714. The U-shaped tooth bar 714 is in tooth engagement with a tooth column 718 through a transmission gear 717 arranged in a rotating manner. The lower end of the tooth column 718 is fixed on an elastic diaphragm 719, and the elastic diaphragm 719 is hermetically installed in the inner cavity of an installation groove 720 provided inside a hollow cylinder 76;

[0032] The wind cooling unit 8 includes N installation cylinders 81 arranged in a straight line. Adjacent two installation cylinders 81 are connected through a connecting pipe 85. A rotating shaft 83 is hermetically and rotatably arranged on the installation cylinder 81. A plurality of bowl-shaped wind catchers 84 are arranged in a circular manner on the rotating shaft 83. A cooling fan blade is installed at the lower end of the rotating shaft 83. An air inlet pipe 82 is provided on the outer wall of the installation cylinder 81 close to the exhaust pipe 78, and the air inlet pipe 82 is connected with the exhaust pipe 78. The outer wall of the installation cylinder 81 far from the exhaust pipe 78 communicates with the inner cavity of a heat conduction box 5 through a diversion pipe 86;

[0033] An air outlet branch pipe 10 is further arranged on the main pipe 2. Valves are arranged on both the air outlet branch pipe 10 and two air inlet branch pipes 73;

[0034] A stop bar 16 is arranged on the inner wall of the hollow cylinder 76, and the stop bar 16 is located in the U-shaped cavity of the U-shaped tooth bar 714.

[0035] When in use, the valve on the air outlet branch pipe 73 is closed, and the other valve is opened. The vacuum pump 2 on the tunnel dryer 1 transports the generated hot air to the heating chamber through the air inlet branch pipe 73 to heat the low-boiling point liquid in the inner cavity of the heat-conducting hollow column 74. The hot air is discharged from the side air outlet pipe 72 (which is connected to the pipeline to discharge the gas to the outside) after absorbing heat. The low-boiling point liquid vaporizes after absorbing heat, causing the air pressure in the inner cavity of the heat-conducting hollow column 74 to increase. When the internal air pressure increases to a certain extent, the internal air pressure will push the movable rod 710 to squeeze the compression spring 712. When the elastic sealing ring 711 on the movable rod 410 is about to move to the air inlet of the flow channel 77 (at this position, the thrust generated by the magnetic force and air pressure on the movable rod 710 is greater than the thrust of the movable rod 710 The resistance encountered by the movable rod 710, and at the same time, when the movable rod 710 continues to move to the right, the increase in its magnetic force per unit time is greater than the increase in the elastic force of the compression spring 712), the distance between the first magnet 14 and the second magnet 15 becomes smaller, and the magnetic force increases. At this time, the gas pressure thrust, magnetic force and inertia generated by the low-boiling point liquid overcome the elastic force of the compression spring 712 and the resistance encountered by the movable rod 710 when moving, so that the elastic sealing ring 712 passes over the air inlet of the flow channel 77, and in this process, the baffle 713 contacts the extrusion slope, and finally the baffle 713 moves to the U-shaped cavity of the U-shaped gear rod 714 and closes to the baffle bar 16. As the high-pressure gas is discharged from the flow channel 77, the internal air pressure of the heat-conducting hollow column 74 continues to decrease, squeezing the movable rod 710 The force is continuously reduced until the elastic force of the compression spring 712 is greater than the combined force of the thrust of the air pressure on the movable rod 710, the magnetic force and the driving force exerted on the rotation of the drive shaft 722. The side end of the baffle plate 713 is in conflict with the side end of the U-shaped gear rod 714 through the elastic force of the compression spring 712 (at this time, the first magnet 14 and the second magnet 15 are pulled apart by one end, and the magnetic force between the two is reduced). The internal high-pressure gas is transported to the installation cylinder 81 through the flow channel 77 and the exhaust pipe 78, and the wind is captured by the wind catcher 84 to drive the rotating shaft 83 to rotate, so that the heat dissipation fan blades rotate to generate wind force to dissipate the heat of the printed napkins being transported, thereby reducing the temperature of the printed napkins after drying. When the movable rod 710 moves to the right, the movement of the rack 721 can bring The driving shaft 722 is driven to rotate, and the rotation of the driving shaft 722 can drive the screw 726 to rotate, and finally the column 728 drives the piston 730 to move upward, so that the low-boiling point liquid liquefied at the bottom of the heat-conducting box 5 is sucked into the piston cylinder 724. At the same time, as the high-pressure gas with heat waves in the heat-conducting hollow column 74 continues to enter the heat-conducting box 5 through the flow channel 77 in large quantities (at this time, the liquefied amount of gas is less than the amount of gas entering), the air pressure in the heat-conducting hollow column 74 continues to decrease, and the air pressure in the heat-conducting box 5 continues to increase. The inner cavity of the heat-conducting box 5 is connected with the inner cavity of the hollow cylinder 76 through the air pipe 723, so that the air pressure in the hollow cylinder 76 is also constantly rising. At this time, the external air pressure is greater than the air pressure in the sealed cavity formed between the elastic diaphragm 719 and the mounting groove 720.The elastic diaphragm 719 will drive the tooth column 718 to move downward, drive the U-shaped tooth rod 714 to move upward through the transmission gear 717, and then release the blockage of the baffle 713 by the U-shaped tooth rod 714. At this time, under the elastic force of the compression spring 712, the movable column 710 moves to the left and returns to its original position (at this time, the air pressure in the inner cavity of the heat-conducting hollow column 74 is very low because the internal gas is discharged into the heat-conducting box 5), and at this time, the movable rod 710 will also drive the rack 721 to move back to its original position. The rack 721 drives the screw rod 726 to rotate in the reverse direction, and then the low-boiling-point liquid in the inner cavity of the piston cylinder 724 is pressed into the inner cavity of the heat-conducting hollow column 74, so as to form a recycling of the low-boiling-point liquid. At the same time, with the reciprocating movement of the rack 721, the liquefied low-boiling-point liquid in the inner cavity of the heat-conducting box 5 is pumped into the accommodating cavity of the heat-conducting hole hollow column 74.

[0036] It should be noted that, first, a driving gear 727 is fixed to the upper end of the screw rod 726. Gears are provided at both the upper and lower ends of the driving shaft 722, and the diameter of the lower gear is smaller than that of the driving gear 727. The small gear drives the large gear to rotate, thus forming a labor-saving lever, which is beneficial to driving the rotation of the screw rod 726; second, each component in the driving unit 7 and the wind power heat dissipation unit 8 is made of heat-insulating material or heat-insulating coatings are provided on both the inner and outer surfaces. The purpose is to prevent external heat from being conducted into the inner cavity of the hollow cylinder 76, resulting in no obvious downward extrusion movement of the elastic diaphragm 719 and the inability of the movable rod 710 to return to its original position. The heat-conducting box 5 and the heat-conducting hollow column 74 are made of heat-conducting materials, which is convenient for the liquefaction cycle of gas and the liquefaction of low-boiling-point liquid; third, when the air pressure stored in the heat-conducting hollow column 74 is ejected as high-pressure gas, its heat dissipation fan blades are always in a rotating state, but the generated wind power will become smaller and smaller. The heat dissipation effect on the printed napkin can be improved by reducing the stored air pressure to the time when the high-pressure gas is ejected; fourth, this device can be used in spring, autumn and summer. When it is winter, the valve on the air outlet branch pipe 10 can be directly opened and closed to make the air flow indoors and increase the indoor temperature; fifth, when the baffle 713 is blocked and limited by the U-shaped tooth plate 714 and the stop bar 16, during this limited time, enough acceleration time is provided for the high-pressure gas to drive the rapid rotation of the heat dissipation fan blades, so that the heat dissipation fan blades are accelerated to a relatively high rotation speed, which is beneficial to improving the heat dissipation effect on the printed napkin; sixth, through the limitation of the baffle 713, after the air pressure in the heat-conducting hollow column 74 is reduced to a low level, the low-boiling-point liquid is pressed into the inner cavity of the heat-conducting hollow column 74, which is beneficial to injecting the low-boiling-point liquid into the inner cavity of the heat-conducting hollow column 74; seventh, a first pressure gauge 13 and a Y-shaped pipe 13 communicating with the inner cavity of the installation groove 720 are provided on the hollow cylinder 76. A second pressure gauge 12 is installed on the Y-shaped pipe 13, and an exhaust valve and an inflation head convenient for inflation are installed on the two branch pipes of the Y-shaped pipe 13.

[0037] As a preferred implementation manner in this embodiment, such asFigure 4 , Figure 7 and Figure 8 As shown in Figure 8 , it further includes a magnetic isolation mechanism 9. When the baffle 713 moves into place and is blocked and limited by the U-shaped rack 714 under the magnetic force of the first magnet 14 and the second magnet 15, the magnetic isolation mechanism 9 forms an occlusion for the first magnet 14 to release the magnetic force between the first magnet 14 and the second magnet 15.

[0038] The purpose of setting the magnetic isolation mechanism 9 is to release the magnetic force between the first magnet 14 and the second magnet 15, so that the subsequent compression spring 712 drives the movable rod 410 to quickly return to its original position. With the release of the magnetic force, the drive shaft 722 can obtain a greater rotational force through the rack 721, which is beneficial to pressing the low-boiling-point liquid to the heat-conducting hollow column 74 through the piston 730.

[0039] As a preferred implementation manner in this embodiment, as Figure 7 and Figure 8 shown, the magnetic isolation mechanism 9 includes a toothed plate 91 installed on the right end of the movable rod 710, a rotating column 92 rotatably arranged in the inner cavity of the hollow cylinder 76, and an L-shaped sliding rod 93. The lower end of the rotating column 92 is in tooth engagement with the toothed plate 91 through a one-way gear 98. A spiral rising slideway 96 is arranged on the rotating column 92, and the head and tail ends of the slideway 96 are connected through a vertical cavity 97. One end of the L-shaped sliding rod 93 is slidably arranged in the vertical cavity 97, and a magnetic isolation shielding plate 95 is fixedly arranged at the other end of the L-shaped sliding rod 93. The two side ends of the magnetic isolation shielding plate 95 are slidably arranged in a U-shaped groove 94 provided on the inner wall of the hollow cylinder 76.

[0040] When the movable rod 710 moves to the right, the movement of the toothed plate 91 will cause the one-way gear 98 to drive the rotating column 92 to rotate, increasing the rotation of the one-way gear 98 and then driving the rotating column 92 to rotate clockwise. At this time, through the action of the L-shaped sliding rod 93, the magnetic isolation shielding plate 95 moves upward. When the magnetic isolation shielding plate 95 completely releases the occlusion of the first magnet 14, the magnetic force between the first magnet 14 and the second magnet 15 is very small. When the elastic sealing ring 711 on the movable rod 410 is about to move to the air inlet of the flow channel 77, the magnetic force between the first magnet 14 and the second magnet 15 becomes larger, causing the movable rod 710 to move quickly to the right and finally blocking the baffle 713. At this time, the rotating column 92 just rotates one week, that is, the L-shaped sliding rod 93 moves to the highest point of the vertical cavity 91, and due to its own gravity, the magnetic isolation shielding plate 95 moves downward and returns to its original position. At this time, the magnetic field between the first magnet 14 and the second magnet 15 is blocked, and the magnetic force is greatly weakened, so that the resistance suffered by the compression spring 712 driving the movable rod 710 to return to its original position is greatly reduced, which is beneficial to pressing the low-boiling-point liquid in the piston cylinder 724 to the heat-conducting hollow column 74.

[0041] It should be noted that when the movable rod 710 moves back to its original position, the toothed plate 9 cannot drive the rotating column 92 to rotate through the one-way gear 98.

[0042] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An air-cooled printing napkin drying device, comprising a tunnel dryer (1) and conveying rollers (4). A plurality of air outlets on the tunnel dryer (1) are all connected to a main pipe (2) with an air extraction pump (3). It is characterized in that: It further includes a driving unit (7) and a wind cooling unit (8); The driving unit (7) includes a heat preservation barrel (71) installed at the upper end of the tunnel dryer (1). The heat preservation barrel (71) is connected to the main pipe (2) through an intake branch pipe (73). A heat-conducting hollow column (74) is hermetically arranged in the inner cavity of the heat preservation barrel (71), and the inner cavity of the heat-conducting hollow column (74) is filled with a low-boiling-point liquid. A side air outlet pipe (72) and an upper air outlet pipe (75) are respectively arranged on the outer side wall and the top end of the heat preservation barrel (71). The upper air outlet pipe (75) communicates with the inner cavity of the heat-conducting hollow column (74). A heating cavity is formed between the inner wall of the heat preservation barrel (71) and the outer wall of the heat-conducting hollow column (74). The upper end of the upper air outlet pipe (75) is connected to a hollow cylinder (76); An exhaust pipe (78) is provided on the hollow cylinder (76). The inner cavity of the exhaust pipe (78) communicates with the inner cavity of the upper exhaust pipe (75) through a flow channel (77). A vertical plate (79) is fixed in the inner cavity of the hollow cylinder (76). The vertical plate (79) is slidably penetrated by a movable rod (710). The left end of the movable rod (710) is slidably arranged in the inner cavity of the upper exhaust pipe (75). An elastic sealing ring (711) is fixedly sleeved on the left end of the movable rod (710). A second magnet (15) is fixed to the right end of the movable rod (710). A first magnet (14) is arranged at a position on the inner wall of the hollow cylinder (76) opposite to the second magnet (15). The opposite ends of the first magnet (14) and the second magnet (15) have opposite magnetic poles. A baffle (713) is fixedly sleeved on the movable rod (710). A compression spring (712) is fixedly installed between the baffle (713) and the vertical plate (79). A rack (721) is fixed to the lower end of the baffle (713). The right end of the rack (721) slidably penetrates the vertical plate (79). The rack (721) is in tooth engagement with a gear on a driving shaft (722) rotatably and sealingly arranged. The lower end of the driving shaft (722) is located outside the hollow cylinder (76). The lower end of the driving shaft (722) is meshed with a screw rod (726) through a gear. The screw rod (726) is installed on a bracket (725). The lower end of the screw rod (726) is located in a threaded cavity of a column (728). The column (728) is slidably arranged on the bracket (725). The bracket (725) is installed on a piston cylinder (724). The lower end of the column (728) is fixed to a piston (730). The piston (730) is sealingly and slidably arranged in the inner cavity of the piston cylinder (724). A liquid inlet pipe (729) and a liquid discharge pipe (731) are respectively arranged at the side end and the bottom of the piston cylinder (724). A liquid inlet one-way valve and a liquid discharge one-way valve are respectively arranged on the liquid inlet pipe (729) and the liquid discharge pipe (731). The lower end of the liquid inlet pipe (729) penetrates the upper end of a heat conduction box (5) and extends to the bottom of the inner cavity of the heat conduction box (5). The heat conduction box (5) is located underground and seals a placement opening arranged on the ground through a heat insulation board (6). The hollow cylinder (76) communicates with the inner cavity of the heat conduction box (5) through a guide air pipe (723). The liquid discharge pipe (731) communicates with the inner cavity of the heat conduction hollow column (74); It further includes a U-shaped toothed rod (714) slidably arranged on a limit plate (715). An extrusion inclined surface (716) is arranged at the left lower end of the U-shaped toothed rod (714). The U-shaped toothed rod (714) is in tooth engagement with a tooth column (718) through a rotatably arranged transmission gear (717). The lower end of the tooth column (718) is fixed to an elastic diaphragm (719). The elastic diaphragm (719) is sealingly installed in the inner cavity of an installation groove (720) arranged inside the hollow cylinder (76); The wind heat dissipation unit (8) comprises N mounting tubes (81) arranged in a straight line, two adjacent mounting tubes (81) are connected via a connecting tube (85), a rotating shaft (83) is provided on the mounting tube (81) for sealing and rotation, a plurality of bowl-shaped wind catchers (84) are provided on the rotating shaft (83) in a circumferential manner, a heat dissipation fan blade is installed at the lower end of the rotating shaft (83), an air intake pipe (82) is provided on the outer wall of the mounting tube (81) close to the exhaust pipe (78), and the air intake pipe (82) is connected to the exhaust pipe (78), and the outer wall of the mounting tube (81) away from the exhaust pipe (78) is communicated with the inner cavity of the heat conduction box (5) via a guide pipe (86); The main pipe (2) is also provided with an outlet branch pipe (10), and the outlet branch pipe (10) and the two inlet branch pipes (73) are both provided with valves; A retaining bar (16) is provided on the inner wall of the hollow cylinder (76), and the retaining bar (16) is located in the U-shaped cavity of the U-shaped gear rod (714).

2. The air-cooled printing napkin drying equipment according to claim 1, characterized in that: It also comprises a magnetic isolation mechanism (9), and when the baffle (713) moves to a certain position due to the magnetic force of the first magnet (14) and the second magnet (15) and is blocked and limited by the U-shaped gear rod (714), the magnetic isolation mechanism (9) blocks the first magnet (14) and releases the magnetic force between the first magnet (14) and the second magnet (15).

3. The air-cooled printing napkin drying equipment according to claim 2, characterized in that: The magnetic isolation mechanism (9) comprises a toothed plate (91) mounted on the right end of the movable rod (710), a rotating column (92) rotatably arranged in the inner cavity of the hollow cylinder (76), and an L-shaped slide rod (93); the lower end of the rotating column (92) is gear-connected with the toothed plate (91) via a one-way gear (98); a spirally ascending slideway (96) is arranged on the rotating column (92), and the head and tail ends of the slideway (96) are connected via a vertical cavity (97); one end of the L-shaped slide rod (93) is slidably arranged in the vertical cavity (97); the other end of the L-shaped slide rod (93) is fixedly provided with a magnetic isolation shielding plate (95), and both side ends of the magnetic isolation shielding plate (95) are slidably arranged in a U-shaped groove (94) provided on the inner wall of the hollow cylinder (76).

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