Novel printing napkin drying equipment

Abstract

The utility model discloses novel printing napkin drying equipment which comprises a tunnel dryer and a conveying roller, a plurality of air outlets in the tunnel dryer are all connected with a main pipe with an air extracting pump, the novel printing napkin drying equipment further comprises two sets of driving units and two sets of wind power heat dissipation units, and the two wind power heat dissipation units are located on the upper side and the lower side of printing napkins respectively. 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 by using low-boiling-point liquid as a medium through hot gas exhausted by the main pipe, and generated high-pressure gas is cooled through the underground temperature difference and then recycled. And the dried printed napkins can be continuously cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of napkin production, and particularly relates to a novel drying device for printed napkins. Background Technique

[0002] The ink printing process for 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 the solvent 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, tunnel dryers are used to dry printed napkins. The drying temperature is generally controlled between 80°C and 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 a novel drying device for printed napkins to meet the requirements. Summary of the Utility Model

[0004] The purpose of this application is to provide a novel drying device for printed napkins to solve the technical problems raised in the above background technique.

[0005] To achieve the above purpose, this application provides the following technical solution: A novel drying device for printed napkins, including 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. It also includes two groups of driving units and two groups of wind heat dissipation units. The two wind heat dissipation units are respectively located on the upper and lower sides of the printed napkins;

[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 is communicated 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. An electric telescopic rod is fixed on the vertical plate. A movable rod is fixed on the output end of the electric telescopic 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 baffle is fixedly sleeved on the movable rod. A rack is fixed at the lower end of the baffle, and the right end of the rack slidably penetrates through the vertical plate. The rack is in tooth engagement with a gear on a driving shaft rotatably arranged in a sealed manner.

[0008] And the lower end of the driving shaft is located outside the hollow cylinder. The lower end of the driving shaft is meshed and connected 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 on the piston, and the piston is slidably arranged in the inner cavity of the piston cylinder in a sealed manner. An inlet pipe and a drain pipe are respectively arranged on the side end and the bottom of the piston cylinder. An inlet one-way valve and a drain one-way valve are respectively arranged on the inlet pipe and the drain pipe. The lower end of the inlet pipe penetrates through 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 arranged on the ground through a heat preservation board. The drain pipe communicates with the inner cavity of the heat conduction hollow column.

[0009] The wind power cooling 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 arranged in a sealed manner on the installation cylinder. A plurality of bowl-shaped wind catchers are arranged in a circumferential manner on the rotating shaft. A cooling 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, and 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 diversion 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] As a preferred implementation manner in this embodiment, the inner cavity diameters of N - 1 connecting pipes gradually decrease from the side close to the upper air outlet pipe.

[0012] As a preferred implementation manner in this embodiment, heat dissipation fins are arranged on the outer surface of the heat conduction box.

[0013] In summary, the technical effects and advantages of the present utility model:

[0014] The structure of the utility model is reasonable. Through the driving unit and the wind cooling unit, the hot air discharged from the main pipe is used to convert the heat energy into the kinetic energy that drives the wind cooling unit to generate wind by using a low-boiling-point liquid as a medium, and the high-pressure gas generated is cooled by the temperature difference between the ground and underground and then recycled, so as to realize continuous cooling treatment of the dried printed napkins. Brief Description of the Drawings

[0015] 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 for use 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, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic diagram of the installation structure of the utility model;

[0017] Figure 2 It is a three-dimensional structure schematic diagram of the utility model;

[0018] Figure 3 It is Figure 2 a partial enlarged structure schematic diagram in

[0019] Figure 4 It is Figure 3 a cross-sectional structure schematic diagram of the hollow cylinder in

[0020] Figure 5 It is Figure 3 a cross-sectional structure schematic diagram of the heat preservation barrel in

[0021] Figure 6 It is Figure 2 a structure schematic diagram of the wind cooling unit in

[0022] In the figure: 1, tunnel dryer; 2, main pipe; 3, air extraction pump; 4, conveying 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, electric telescopic rod; 713, baffle; 714, liquid discharge pipe; 715, piston; 716, liquid inlet pipe; 717, column; 718, driving gear; 719, screw rod; 720, bracket; 721, rack; 722, driving shaft; 723, piston cylinder; 8, wind cooling unit; 81, installation cylinder; 82, intake pipe; 83, rotating shaft; 84, wind catcher; 85, connecting pipe; 86, diversion pipe; 9, air outlet branch pipe. Detailed Embodiments

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Example: Refer to Figure 1-6 A new type of printing napkin drying device as shown, which 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 two sets of driving units 7 and two sets of wind cooling units 8. The two wind cooling units 8 are respectively located on the upper and lower sides of the printing napkin;

[0025] 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 is communicated 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;

[0026] An exhaust pipe 78 is arranged on the hollow cylinder 76. The inner cavity of the exhaust pipe 78 is communicated 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. An electric telescopic rod 712 is fixed on the vertical plate 79. A movable rod 710 is fixed on the output end of the electric telescopic rod 712. 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 baffle 713 is fixedly sleeved on the movable rod 710. A rack 721 is fixed at the lower end of the baffle 713, and the right end of the rack 721 slidably penetrates through the vertical plate 79. The rack 721 is in tooth connection with a gear on a driving shaft 722 rotatably arranged in a sealed manner,

[0027] Moreover, the lower end of the drive shaft 722 is located outside the hollow cylinder 76. The lower end of the drive shaft 722 is meshed and connected to the screw rod 719 through a gear. The screw rod 719 is installed on the bracket 720. The lower end of the screw rod 719 is located in the threaded cavity of the column 717. The column 717 is slidably arranged on the bracket 720. The bracket 720 is installed on the piston cylinder 723. The lower end of the column 717 is fixed on the piston 715. And the piston 715 is hermetically and slidably arranged in the inner cavity of the piston cylinder 723. The side end and the bottom of the piston cylinder 723 are respectively provided with a liquid inlet pipe 716 and a liquid discharge pipe 714. A liquid inlet one-way valve and a liquid discharge one-way valve are respectively arranged on the liquid inlet pipe 716 and the liquid discharge pipe 714. The lower end of the liquid inlet pipe 716 penetrates through the upper end of the 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 the placement opening arranged on the ground through the heat preservation board 6. The liquid discharge pipe 714 communicates with the inner cavity of the heat conduction hollow column 74;

[0028] The wind power heat dissipation 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 circle on the rotating shaft 83. A heat dissipation fan blade is installed at the lower end of the rotating shaft 83. An air inlet pipe 82 is arranged on the outer wall of the installation cylinder 81 close to the exhaust pipe 78. And the air inlet pipe 82 is connected to the exhaust pipe 78. The outer wall of the installation cylinder 81 far from the exhaust pipe 78 communicates with the inner cavity of the heat conduction box 5 through a diversion pipe 86;

[0029] An air outlet branch pipe 9 is further arranged on the main pipe 2. Valves are arranged on both the air outlet branch pipe 9 and the two air inlet branch pipes 73.

[0030] During use, close the valve on the air outlet branch pipe 73, and open the other two valves. The air extraction pump 2 on the tunnel dryer 1 conveys the generated hot air through the intake branch pipe 73 to the heating cavity, heating the low-boiling-point liquid in the inner cavity of the heat-conducting hollow column 74. After the hot air is absorbed by heat, it is discharged from the side air outlet pipe 72 (which is connected to a pipe to discharge the gas to the outside). The low-boiling-point liquid vaporizes after absorbing heat. When the internal pressure increases to a certain extent, one of the electric telescopic rods 712 can be controlled to work, so that the elastic sealing ring on one of the movable rods 710 crosses the flow channel 77. The high-pressure gas in the inner cavity of the heat-conducting hollow column 74 is conveyed to the installation cylinder 81 through the flow channel 77 and the exhaust pipe 78, captures the wind through the wind catcher 84 and drives the rotating shaft 83 to rotate, so that the upper heat dissipation fan blades rotate to generate wind and then dissipate heat from the printed napkins being conveyed, 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 drive the drive shaft 722 to rotate, and the rotation of the drive shaft 722 can drive the screw rod 719 to rotate, and finally the column 717 drives the piston 715 to move upward, so as to suck the low-boiling-point liquid liquefied at the bottom of the heat-conducting box 5 into the piston cylinder 723. After the air pressure in the heat-conducting hollow column 74 is reduced to a certain extent, control the electric telescopic rod 712 to make the movable rod 710 return to its original position (during this process, the piston 715 will also be driven by the rack 721 to return to its original position, that is, to realize the pressing and filling of the low-boiling-point liquid into the inner cavity of the heat-conducting hollow column 74, completing the recycling of the low-boiling-point liquid). At the same time, control the other electric telescopic rod 712 to make the other movable rod 710 move, and the other flow channel 77 is opened to form a passage, so that the lower heat dissipation fan blades rotate to generate wind and then dissipate heat from the printed napkins being conveyed. The two wind heat dissipation units 8 work alternately, which can realize continuous heat dissipation of the printed napkins and make the heat dissipation of the printed napkins more uniform.

[0031] It should be noted that: First, a driving gear 718 is fixed to the upper end of the screw rod 719. Gears are provided at both the upper and lower ends of the drive shaft 722, and the diameter of the lower gear is smaller than that of the driving gear 718. The small gear drives the large gear to rotate, thereby constituting a labor-saving lever, which is beneficial to driving the screw rod 719 to rotate; Second, all components in the driving unit 7 and the wind heat dissipation unit 8 are made of heat-insulating materials or heat-insulating coatings are provided on both the inner and outer surfaces. 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, during the period when the same driving unit 7 drives the high-pressure gas to be ejected again, each heat dissipation fan blade is constantly decelerating, but does not stop moving; Fourth, when it is winter, the valve on the air outlet branch pipe 10 can be directly opened and the other valve can be closed, so that the hot air flows indoors to increase the indoor temperature; Fifth, both electric telescopic rods 712 are electrically connected to the PLC controller, and automatic control is performed through the PLC controller.

[0032] As a preferred implementation manner in this embodiment, the inner cavity apertures of the N - 1 connecting pipes 85 decrease sequentially starting from the side close to the upper air outlet pipe 75.

[0033] Since the driving force on the row - arranged heat - dissipating fan blades continuously decreases as the kinetic energy of the gas ejected at high speed is lost, by sequentially reducing the inner cavity apertures of the connecting pipes 85 to increase the air pressure to accelerate the ejection of the gas, the rotational speed of the subsequent heat - dissipating fan blades can be increased, thereby improving the heat - dissipating effect on the printed napkins.

[0034] As a preferred implementation manner in this embodiment, heat - dissipating fins are arranged on the outer surface of the heat - conducting box 5.

[0035] Through the arrangement of the heat - dissipating fins, the contact area between the heat - conducting box 5 and the underground cold air is increased, thereby accelerating heat dissipation.

[0036] Finally, it should be noted that the above - mentioned are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A new type of printing napkin drying equipment, including 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), and it is characterized in that: It also includes two sets of driving units (7) and two sets of wind heat dissipation units (8), and the two wind heat dissipation units (8) are respectively located on the upper and lower sides of the printed napkin; 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 exhaust pipe (72) and an upper exhaust pipe (75) are respectively arranged on the outer side wall and the top end of the heat preservation barrel (71). The upper exhaust 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 exhaust pipe (75) is connected to a hollow cylinder (76); 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 exhaust pipe (75) through a flow channel (77). A vertical plate (79) is fixed in the inner cavity of the hollow cylinder (76). An electric telescopic rod (712) is fixed on the vertical plate (79). A movable rod (710) is fixed on the output end of the electric telescopic rod (712). 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 baffle (713) is fixedly sleeved on the movable rod (710). A rack (721) is fixed at the lower end of the baffle (713), and the right end of the rack (721) slidably penetrates through the vertical plate (79). The rack (721) is in gear 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 in meshing connection with a screw rod (719) through a gear. The screw rod (719) is installed on a bracket (720). The lower end of the screw rod (719) is located in a threaded cavity of a column (717). The column (717) is slidably arranged on the bracket (720). The bracket (720) is installed on a piston cylinder (723). The lower end of the column (717) is fixed on a piston (715), and the piston (715) is hermetically slidably arranged in the inner cavity of the piston cylinder (723). An inlet pipe (716) and a drain pipe (714) are respectively arranged on the side end and the bottom of the piston cylinder (723). An inlet check valve and a drain check valve are respectively arranged on the inlet pipe (716) and the drain pipe (714). The lower end of the inlet pipe (716) penetrates through 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 drain pipe (714) communicates with the inner cavity of the heat-conducting hollow column (74); The wind cooling unit (8) includes N mounting cylinders (81) arranged in a straight line. Adjacent two mounting cylinders (81) are connected by a connecting pipe (85). A rotating shaft (83) is rotatably and sealingly arranged on the mounting cylinder (81). A plurality of bowl-shaped wind catchers (84) are arranged in a circle 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 mounting cylinder (81) close to the exhaust pipe (78), and the air inlet pipe (82) is connected to the exhaust pipe (78). The outer wall of the mounting cylinder (81) far from the exhaust pipe (78) communicates with the inner cavity of the heat conduction box (5) through a diversion pipe (86); An air outlet branch pipe (9) is further arranged on the main pipe (2), and valves are arranged on the air outlet branch pipe (9) and the two air inlet branch pipes (73).

2. The novel printing napkin drying equipment according to claim 1, characterized in that: The inner cavity diameters of N - 1 connecting pipes (85) gradually decrease from the side close to the upper air outlet pipe (75).

3. A novel printing napkin drying device according to claim 1, characterized in that: Heat dissipation fins are arranged on the outer surface of the heat conduction box (5).

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