High-efficiency drying and heat energy recycling integrated mechanical device of printing unit

Abstract

The application relates to the technical field of carton printing equipment, and discloses a high-efficiency drying and heat energy recycling integrated mechanical device of a printing unit, which comprises a conveying mechanism, a drying box, a hot air blower, a shunt box and a reflux pipe, and the shunt box is internally provided with an adjusting mechanism and a cleaning mechanism. The adjusting mechanism comprises a moisture absorption element, a liquid cylinder, a liquid column, an elastic sheet and a lever gear and rack transmission assembly; after the moisture absorption element absorbs moisture in hot air and increases in weight to drive a hydraulic system to make the elastic sheet jump, the two-stage amplification of a lever and a gear and rack is carried out, the opening and closing of two groups of blades in the shunt box are controlled through a traction line, and the automatic switching of a circulating air duct and a fresh air duct is realized. The cleaning mechanism utilizes airflow in the shunt box to drive an impeller to rotate, drives a cleaning plate to reciprocate through eccentric transmission, and cleans dust on the surface of the moisture absorption element. The application senses humidity and switches the air duct through a pure mechanical structure, does not need an electronic sensor, has the functions of waste heat recycling, automatic moisture removal and self-cleaning, and is high in reliability.

Description

Technical Field

[0001] This invention relates to the field of cardboard printing equipment technology, specifically to a high-efficiency drying and heat recovery integrated mechanical device for a printing unit. Background Technology

[0002] In the cardboard box printing process, the printed ink needs to be dried before proceeding to subsequent processes. Traditional printing drying equipment typically uses hot air drying. Hot air generated by a hot air blower is sent into the drying chamber through air ducts to heat and dry the ink on the surface of the printed material before being directly discharged into the atmosphere. While this method achieves the drying function, it has the following drawbacks:

[0003] First, hot air is discharged after one use, and a large amount of heat is lost with the exhaust gas, resulting in serious energy waste. Although some printing presses have adopted hot air circulation technology to recover and reuse some hot air, most existing circulation systems rely on electronic sensors and controllers to determine the switching time. The system structure is complex and the cost is high. Moreover, in harsh environments with high temperature and high humidity, the reliability and service life of electronic components are affected.

[0004] Secondly, the hot air generated during the drying process carries a large amount of water vapor. As the number of cycles increases, excessively high humidity in the hot air will lead to a significant decrease in drying efficiency. However, in the existing technology, there is no mature solution on how to sense changes in hot air humidity and automatically adjust the circulation mode through a simple and reliable mechanical means.

[0005] In addition, the hot air in the printing drying process also contains dust and debris that falls off the surface of the carton. Long-term use will cause dust to accumulate in the air duct and heating element, affecting heat exchange efficiency and equipment life. Existing technology lacks an effective dust removal design for moisture absorption elements.

[0006] Therefore, there is an urgent need to develop an integrated mechanical device that can automatically switch the circulation mode according to the humidity of the hot air and recover waste heat to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-efficiency drying and heat recovery integrated mechanical device for printing press units.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A high-efficiency drying and heat recovery integrated mechanical device for a printing press unit includes a conveying mechanism. A drying chamber is horizontally mounted on the upper part of the conveying mechanism. One side of the drying chamber is connected to the air outlet of a hot air blower, and the other side of the drying chamber is connected to one end of a distribution box. The other end of the distribution box is connected to one end of a return pipe. The other end of the return pipe is connected to a ventilation cavity extending through the side of the conveying mechanism. The other end of the ventilation cavity is connected to one side of an exhaust pipe. The top of the exhaust pipe is connected to the return air outlet at the bottom of the hot air blower. The device also includes:

[0010] An adjustment mechanism is located on one side of the diversion box and controls the opening and closing of the airflow passage inside the diversion box through the cooperation of sensing elements and linkage components.

[0011] A cleaning mechanism is provided on one side of the sensing element of the adjustment mechanism to clean dust and debris from the surface of the sensing element.

[0012] Furthermore, the flow divider includes multiple sets of first blades and second blades arranged symmetrically. The upper and lower central shafts of the multiple sets of first blades and second blades are rotatably connected to the upper and lower inner walls of the flow divider. One end of the first blade and the second blade rotatably extends through the outer wall of the flow divider and is respectively fixed to one end of the second short connecting rod and the first short connecting rod. The other end of the second short connecting rod and the first short connecting rod are respectively rotatably connected to one side of the second long connecting rod and the first long connecting rod.

[0013] With the above structure, two selectable airflow paths are formed inside the diversion box: the first path, controlled by the first blade, connects to the return pipe for hot air circulation and recovery; the second path, controlled by the second blade, connects to the exhaust pipe for discharging high-humidity exhaust gas and introducing fresh air.

[0014] Furthermore, one side of the second long connecting rod is fixed to one end of the second crank, the other end of the second crank is fixed to one end of the second spring, the other end of the second spring is fixed to the second fixing block, and the second fixing block is fixed to the outer wall of the diverter box. One side of the first long connecting rod is fixed to one end of the first crank, the other end of the first crank is fixed to one end of the first spring, the other end of the first spring is fixed to the first fixing block, and the first fixing block is fixed to the outer wall of the diverter box.

[0015] The aforementioned spring crank structure is used to provide holding force after the blades are switched into position, preventing the blades from shaking or shifting under the impact of airflow, and ensuring the stability of the switching state.

[0016] Furthermore, the adjustment mechanism includes a moisture-absorbing element, which is slidably installed inside the support frame. The upper and lower ends of the support frame are fixedly connected to the inside of the distribution box. The bottom end of the moisture-absorbing element abuts against one end of the piston rod. The other end of the piston rod slides through the bottom end of the support frame and is slidably and sealed inside the liquid cylinder. The tail end of the liquid cylinder is fixedly connected to one side of the liquid column, and the liquid column is fixedly embedded in the bottom of the distribution box.

[0017] The moisture-absorbing element, made of highly absorbent material (such as superabsorbent polymer (SAP) or animal hair bundles), is located on the air inlet side of the distribution box to absorb moisture from the hot air flowing through it. As the amount of moisture absorbed increases, the weight of the moisture-absorbing element gradually increases, pushing the piston rod downwards and transmitting force to the liquid in the cylinder.

[0018] Furthermore, the bottom of the liquid column has an opening that is sealed by a spring sheet. The outer side of the spring sheet abuts against one end of a push rod, and the other end of the push rod is fixed to one end of a lever. The fulcrum of the lever is fixed to the bottom wall of the liquid column, and the lever rotates around the fulcrum. Two floating connecting frames are symmetrically fixed to the other end of the lever. A first gear and a second gear are movably installed between the two connecting frames. A main shaft is fixedly connected to the center of the first gear and the second gear on the same axis. Both ends of the main shaft are movably inserted into the connecting frames. A first rack is meshed with one side of the first gear. A rack support frame is fixed to both sides of the first rack. The bottom end of the rack support frame is fixed to the bottom of the liquid column. A second rack is meshed with one side of the second gear. The second rack is slidably connected to a groove on one side of a limiting slide. The bottom of the limiting slide is fixed to the bottom of the liquid column.

[0019] The working principle of this hydraulic-lever-rack and gear transmission chain is as follows: the humidifying element increases weight and pushes the piston rod, increasing the liquid pressure in the cylinder. When the pressure reaches a preset threshold, the spring at the bottom of the liquid column suddenly deforms, instantly pushing the push rod and lever to swing. The lever drives the first and second gears on the main shaft to move through the floating connecting frame. The gears roll on the fixed and movable racks respectively, amplifying the small swing of the lever into a large stroke displacement of the second rack. The floating connecting frame has reserved space to accommodate the displacement deviation between the lever's arc-shaped motion and the gear's linear motion.

[0020] Furthermore, a first roller bracket is fixedly connected to one side of the limiting slide, and a first roller is rotatably mounted on one side of the first roller bracket. A first traction line is rolled around the top of the first roller. One end of the first traction line is fixedly connected to the bottom end of the second rack, and the other end of the first traction line is rolled around the second roller and the third roller in sequence and fixedly connected to one end of the second long connecting rod. The second roller is rotatably connected to the second roller bracket, and the second roller bracket is fixedly connected to the bottom of the liquid column. The central shaft of the third roller is fixedly connected to the bottom of the liquid column.

[0021] After the second rack is driven, it pulls the second long connecting rod through the first traction line and roller group, thereby controlling the opening and closing state of the second set of blades (connected to the return air duct) in the diversion box.

[0022] Furthermore, the first crank end is fixedly connected to one end of the second traction line, and the other end of the second traction line is rolled around the fourth roller and fixedly connected to the second crank end. The fourth roller is rotatably connected to both sides of the fourth roller, and the bottom of the fourth roller bracket is fixedly connected to the bottom of the liquid column.

[0023] The second traction line is used to realize the linkage of the two sets of blades in the splitter box: when the second long connecting rod is pulled to close the second blade, the first long connecting rod is pulled synchronously to open the first blade through the traction of the second traction line, and vice versa, so as to realize the synchronous reverse opening and closing of the two sets of blades.

[0024] Furthermore, the cleaning mechanism includes two cleaning plates, each with its upper and lower ends fixed to a sliding shaft. Each sliding shaft slides through a protrusion at both ends, the protrusion being fixed to the side wall of the support frame. A U-shaped block is fixed to one end of each sliding shaft, and a first slider is slidably connected within the U-shaped groove of the U-shaped block. The first slider is rotatably connected to one end of a swing linkage, and the other end of the swing linkage is rotatably connected to a mounting plate. A groove is formed in the middle of the swing linkage, and a second slider is slidably connected within the groove. Two sliders are rotatably connected to the eccentric side of a circular block on one side. The central shaft of the circular block is rotatably connected to one side of a mounting plate. The end of the mounting plate is fixed to the outer wall of the distribution box through a mounting plate support frame. The central shafts of the upper and lower circular blocks rotatably pass through the mounting plate and are connected to one end of a toothed belt. A toothed pulley is connected to one side of the middle of the toothed belt. An impeller is fixed to the front side of the toothed pulley. The rear side of the toothed pulley is rotatably connected to an impeller bracket. One side of the impeller bracket is fixed to a guide duct. The guide duct is fixedly installed on the rear side of the moisture absorption element.

[0025] The cleaning mechanism uses airflow within the distribution box to drive the impeller to rotate. A toothed belt drives the eccentric rotation of the circular block, and a swing linkage converts this rotational motion into the reciprocating linear motion of the cleaning plate, thus cleaning dust from the surface of the moisture-absorbing element. A guide duct directs some of the airflow to the impeller to provide it with power.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] Purely mechanical humidity sensing, no electronic components required: It uses the weight change of the moisture-absorbing material to sense the accumulation of humidity in hot air, and achieves threshold triggering through hydraulic amplification and spring snapping. It completely eliminates the dependence on electronic sensors and controllers, and has higher reliability and longer service life in high temperature and high humidity environments.

[0028] Dual-duct intelligent switching balances energy saving and drying quality: Two sets of blades within the distribution box enable automatic switching between a "circulating air duct" and a "fresh air duct." When the hot air quality is good, a circulating mode is used to recover waste heat and reduce energy consumption; when the hot air humidity is too high, it automatically switches to fresh air mode, expelling high-humidity exhaust gas and introducing dry fresh air to ensure drying efficiency.

[0029] Hydraulic-gear rack multi-stage amplification transmission: Through a composite transmission chain of hydraulic amplification by hydraulic cylinder-hydraulic column, energy storage and release by spring snap-up, and stroke multiplication by lever-gear rack, the tiny weight change of the moisture-absorbing material is converted into a large stroke displacement sufficient to drive the blade switching, achieving the technical effect of "small force driving large load".

[0030] Wind-driven self-cleaning mechanism: It uses the existing airflow in the duct to drive the impeller and cleaning plate to reciprocate, and can continuously clean the dust on the surface of the moisture absorption element without the need for an additional power source, thus solving the problem of moisture absorption failure caused by dust accumulation during long-term operation.

[0031] Return air duct auxiliary heating conveyor belt: The return duct connects to the ventilation cavity at the side end of the conveyor mechanism, so that the circulating hot air passes under the conveyor belt before returning to the hot air blower. This not only completes the recovery of hot air, but also provides auxiliary heating to the conveyor belt and the bottom of the carton, forming a three-dimensional drying effect of "pincer attack" from above and below, improving drying uniformity and efficiency. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0033] Figure 1 This is a three-dimensional schematic diagram of the structure of the present invention;

[0034] Figure 2 This is a schematic diagram of the side section structure in this invention;

[0035] Figure 3 This is a schematic diagram of the bottom structure of the flow divider box of the present invention;

[0036] Figure 4 This is an enlarged structural diagram of point A in the present invention;

[0037] Figure 5 This is a schematic diagram of the internal structure of the flow divider box in this invention;

[0038] Figure 6 This is an enlarged structural diagram of point B in this invention;

[0039] Figure 7 This is an enlarged view of point C in this invention;

[0040] Figure 8 This is a schematic diagram of the cleaning mechanism structure in this invention;

[0041] Figure 9 This is a schematic diagram of the cleaning mechanism in this invention.

[0042] In the diagram: 10 Conveying mechanism, 11 Ventilation chamber, 20 Hot air blower, 21 Drying oven, 22 Return pipe, 23 Exhaust pipe, 24 Diverter plate, 25 Motor, 30 Diverter box, 31 First blade, 32 First short connecting rod, 33 First long connecting rod, 34 First crank, 35 First spring, 36 First fixing block, 37 Second short connecting rod, 38 Second long connecting rod, 39 Second crank, 310 Second spring, 311 Second fixing block, 312 Touch switch, 313 Divider plate, 314 Second blade, 315 Inspection plate, 40 Adjusting mechanism, 41 Moisture absorption element, 42 Support frame, 43 Liquid cylinder, 431 Piston rod, 44 Liquid column, 45 Spring, 46 Top rod, 47 Lever, 48 Floating connecting frame, 49 Main shaft, 41 0 First gear, 411 Second gear, 412 First rack, 413 Rack support frame, 414 Second rack, 415 Limiting slide, 416 First roller bracket, 417 First roller, 418 First traction line, 419 Second roller, 420 Second roller bracket, 421 Third roller, 422 Fourth roller, 423 Fourth roller bracket, 424 Second traction line, 50 Cleaning mechanism, 51 Cleaning plate, 52 Sliding shaft, 53 U-shaped block, 54 First slider, 55 Swinging connecting rod, 551 Slide groove, 56 Second slider, 57 Round block, 58 Mounting plate, 59 Mounting plate support frame, 510 Toothed belt, 511 Toothed pulley, 512 Impeller, 513 Guide air duct, 514 Impeller bracket, 515 Protrusion. Detailed Implementation

[0043] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0044] Example 1: Overall Structure and Workflow

[0045] like Figure 1-3 As shown, a high-efficiency drying and heat recovery integrated mechanical device for a printing press includes a conveying mechanism 10, which uses a high-temperature resistant stainless steel mesh conveyor belt. A drying chamber 21 is installed across the upper part of the conveying mechanism 10. The drying chamber 21 is a channel-type box structure with openings at both ends, covering the conveying mechanism 10 and defining the drying space together with the conveyor belt.

[0046] One side of the drying chamber 21 is connected to the air outlet of the hot air blower 20 via an air duct. The hot air generated by the hot air blower 20 is sent into the drying chamber 21 through the air outlet to dry the printed materials on the conveyor belt. The other side (air outlet side) of the drying chamber 21 is connected to one end of the diversion box 30. The diversion box 30 is a square box structure, and its interior is divided into two selectable airflow paths by two sets of blades.

[0047] The other end (air outlet) of the distribution box 30 is connected to one end of the return pipe 22. The return pipe 22 extends along the side of the conveyor mechanism 10 to below the conveyor belt, and its other end is connected to the ventilation cavity 11 that runs through the side of the conveyor mechanism 10. The ventilation cavity 11 is a hollow cavity structure located below the conveyor belt, with one end connected to the return pipe 22 and the other end connected to one side of the exhaust pipe 23. The exhaust pipe 23 is a vertically arranged pipe, and its top is connected to the return air port at the bottom of the hot air blower 20.

[0048] The above-described air duct layout forms a complete hot air circulation path: hot air blower 20 → drying chamber 21 → distribution box 30 → (return pipe 22 → ventilation chamber 11 → exhaust pipe 23) → hot air blower 20 return air outlet. Among them, the distribution box 30 serves as a switching hub, controlling whether the airflow follows the "circulation path" (via the return pipe) or the "exhaust path" (exhausted via the exhaust pipe 23).

[0049] An adjustment mechanism 40 is installed on one side of the distribution box 30 to automatically control the opening and closing of the airflow passage inside the distribution box 30 according to the changes in hot air humidity. A cleaning mechanism 50 is also provided on one side of the moisture absorption element 41 of the adjustment mechanism 40 to periodically clean the dust and debris accumulated on the surface of the moisture absorption element 41. At the same time, a detachable maintenance plate 315 is provided on the top wall of the distribution box 30 corresponding to the position of the moisture absorption element 41, so that the moisture absorption element 41 is a consumable component and can be easily repaired and replaced.

[0050] Example 2: Flow divider blade linkage structure

[0051] like Figure 3 and Figure 5 As shown, multiple sets of first blades 31 and second blades 314 are symmetrically arranged inside the distribution box 30. In this embodiment, three sets of first blades 31 and three sets of second blades 314 are provided, but the number is not limited to this and can be adjusted according to the actual air volume requirements.

[0052] Multiple sets of first blades 31 and second blades 314 are rotatably connected to the upper and lower inner walls of the flow divider 30 via their central pivots, allowing each blade to rotate freely around its own central axis. The multiple sets of first blades 31 and second blades 314 are arranged in a V-shape, reducing resistance to hot airflow on the closed side when one side is closed and the other is open. A partition plate 313 is provided at the V-shaped intersection of the first blades 31 and second blades 314 to separate the airflow on both sides. One end (active end) of each first blade 31 and second blade 314 rotatably extends through the outer wall of the flow divider 30 and is fixedly connected to one end of the second short connecting rod 37 and the first short connecting rod 32, respectively. Specifically, the first blade 31 is connected to the second short connecting rod 37, and the second blade 314 is connected to the first short connecting rod 32.

[0053] The other end (free end) of each of the second short links 37 is rotatably connected to one side of the same second long link 38, and the free end of each of the first short links 32 is rotatably connected to one side of the same first long link 33. When the second long link 38 moves along its length, all the first blades 31 can rotate synchronously through the pull of each of the second short links 37; similarly, when the first long link 33 moves, all the second blades 314 can rotate synchronously through each of the first short links 32.

[0054] like Figure 3 As shown, one side of the second long connecting rod 38 is fixedly connected to one end of the second crank 39, the other end of the second crank 39 is fixedly connected to one end of the second spring 310, the other end of the second spring 310 is fixedly connected to the second fixing block 311, and the second fixing block 311 is fixedly connected to the outer wall of the diversion box 30. Similarly, one side of the first long connecting rod 33 is fixedly connected to one end of the first crank 34, the other end of the first crank 34 is fixedly connected to one end of the first spring 35, the other end of the first spring 35 is fixedly connected to the first fixing block 36, and the first fixing block 36 is fixedly connected to the outer wall of the diversion box 30.

[0055] The working principle of the aforementioned spring-crank structure is as follows: when the second long connecting rod 38 is pulled and moved, the second crank 39 swings accordingly, stretching or compressing the second spring 310. When the external force is removed, the elastic force of the second spring 310 can keep the second long connecting rod 38 in the switched position, preventing the blades from shaking or shifting under the impact of airflow, and ensuring the stability of the airflow path switching. The first spring 35 functions in the same way.

[0056] Example 3: Humidity Sensing and Hydraulic Transmission Mechanism

[0057] like Figure 4 and Figure 8As shown, the adjustment mechanism 40 includes a moisture-absorbing element 41. The moisture-absorbing element 41 is made of superabsorbent polymer (SAP) particles encapsulated in a breathable non-woven bag, or of degreased human / animal hair bundles. In this embodiment, superabsorbent polymer (SAP) is preferred because it has the characteristics of high water absorption ratio (up to hundreds of times its own weight), significant volume expansion, and desorption and regeneration under hot air conditions.

[0058] The moisture-absorbing element 41 is slidably installed inside the support frame 42, which is a cylindrical structure with openings at both the top and bottom. It is fixedly connected to the inside of the distribution box 30 and located on the air inlet side of the distribution box 30. The moisture-absorbing element 41 can slide freely in the vertical direction within the support frame 42.

[0059] The bottom end of the moisture-absorbing element 41 abuts against one end of the piston rod 431, and the other end of the piston rod 431 slides through the bottom end of the support frame 42 and is slidably and sealed inside the hydraulic cylinder 43. The hydraulic cylinder 43 is a vertically arranged cylindrical hydraulic cylinder, and its inner cavity is filled with hydraulic oil or water. A piston (not shown in the figure) is installed at one end of the piston rod 431 inside the hydraulic cylinder 43, and an O-ring seal is provided between the piston and the inner wall of the hydraulic cylinder 43 to achieve a sliding seal.

[0060] The tail end (lower end) of the hydraulic cylinder 43 is fixedly connected to one side of the liquid column 44. The liquid column 44 is a horizontally arranged columnar closed pipe, which is fixedly embedded in the bottom of the distribution box 30. Its interior is connected to the inner cavity of the hydraulic cylinder 43, together forming a closed hydraulic system.

[0061] After the moisture-absorbing element 41 absorbs moisture from the hot air, its weight gradually increases, pushing the piston rod 431 and the piston downwards, applying pressure to the liquid in the liquid cylinder 43. The hydraulic pressure is transmitted to the inside of the liquid column 44 through the liquid.

[0062] Example 4: Spring-triggered mechanism and lever-gear rack transmission mechanism

[0063] like Figure 4 As shown, the bottom of the liquid column 44 has an opening, which is sealed by a spring plate 45. The spring plate 45 is a bistable buckling disc, and its edge is fixedly installed in the mounting groove at the bottom opening of the liquid column 44. The deformed section of the spring plate 45 seals the opening.

[0064] When the liquid pressure inside the liquid column 44 gradually increases but has not yet reached the preset threshold, the spring sheet 45 maintains its original shape and seals the opening. When the liquid pressure reaches the preset threshold (corresponding to the moisture absorbed by the moisture-absorbing element 41 reaching the set amount), the spring sheet 45 undergoes a sudden deformation (i.e., instantaneous reverse bending), and the opening is opened.

[0065] The outer side of the spring piece 45 (the side facing the outside of the liquid column 44) abuts against one end of the push rod 46. The push rod 46 is a vertically arranged straight rod, the other end of which is fixedly connected to one end of the lever 47. The lever 47 is a horizontally arranged rigid rod, the middle of which is rotatably mounted on the bottom wall of the liquid column 44 via a fulcrum. The lever 47 can swing about this fulcrum in a vertical plane.

[0066] Two floating connecting frames 48 are symmetrically fixedly connected to the other end of the lever 47. Each floating connecting frame 48 has a rectangular frame structure with a hollow cavity inside to accommodate the end of the main shaft 49. A first gear 410 and a second gear 411 are movably installed between the two floating connecting frames 48, and the first gear 410 and the second gear 411 are coaxially fixedly connected to the same main shaft 49. Both ends of the main shaft 49 are movably inserted into the hollow cavities of the two floating connecting frames 48, and the floating connecting frames 48 have pre-reserved clearances in both the axial and radial directions of the main shaft 49, allowing the main shaft 49 to undergo a certain range of relative displacement within the frames to accommodate the geometric deviation between the arcuate motion of the lever 47 and the linear motion of the gears.

[0067] A first rack 412 is meshed with one side of the first gear 410. The first rack 412 is fixedly mounted on the rack support frame 413, and the bottom end of the rack support frame 413 is fixedly connected to the bottom of the liquid column 44, so that the first rack 412 remains fixed.

[0068] The second gear 411 is meshed with a second rack 414 on one side. The second rack 414 is slidably connected in a groove on one side of the limiting slide 415. The bottom of the limiting slide 415 is fixedly connected to the bottom of the liquid column 44, guiding the sliding direction of the second rack 414 so that it can only slide back and forth in the horizontal direction.

[0069] The above-mentioned transmission chain works as follows: When the spring piece 45 suddenly deforms, it instantly pushes the push rod 46 downward, causing the lever 47 to swing around the fulcrum. The swing of the lever 47 drives the main shaft 49 to move through the floating connecting frame 48, and the first gear 410 and the second gear 411 on the main shaft 49 move accordingly. Since the first gear 410 meshes with the fixed first rack 412, the first gear 410 is forced to rotate during the movement; the second gear 411, which is coaxial with the first gear 410, rotates synchronously and "walks" on the fixed second rack 414, thereby driving the second rack 414 to produce a horizontal displacement several times the moving distance of the main shaft 49 (stroke amplification effect).

[0070] Example 5: Traction Line Drive and Blade Switching

[0071] like Figure 4As shown, a first roller bracket 416 is fixedly connected to one side of the limiting slide 415, and a first roller 417 is rotatably mounted on one side of the first roller bracket 416. One end of the first traction line 418 is fixedly connected to the bottom end of the second rack 414, then passes upward around the top of the first roller 417, and then passes around the tops of the second roller 419 and the third roller 421 in sequence, and is finally fixedly connected to one end of the second long connecting rod 38.

[0072] The second roller 419 is rotatably connected to the second roller bracket 420, which is fixedly connected to the bottom of the liquid column 44. The central shaft of the third roller 421 is fixedly connected to the bottom of the liquid column 44. Through the guiding and reversing action of the roller assembly, the horizontal displacement of the second rack 414 is converted into the traction force of the second long connecting rod 38.

[0073] When the second rack 414 is driven to move away from the splitter box 30, the first traction line 418 is pulled, and through the steering action of the roller group, the second long connecting rod 38 is pulled and moved, causing all the first blades 31 to rotate synchronously, thus closing the first airflow passage connecting to the return pipe 22.

[0074] At the same time, such as Figure 4 As shown, one end of the first crank 34 is fixedly connected to one end of the second traction line 424, and the other end of the second traction line 424 is fixedly connected to the end of the second crank 39 after passing over the fourth roller 422. The four rollers 422 are rotatably connected to the two sides of the fourth roller bracket 423, and the bottom of the fourth roller bracket 423 is fixedly connected to the bottom of the liquid column 44.

[0075] When the second long connecting rod 38 is pulled, the first long connecting rod 33 is simultaneously pulled (or released) in the opposite direction through the traction of the second traction line 424, causing the second blade 314 to rotate in the opposite direction simultaneously. Specifically, when the first blade 31 is closed, the second blade 314 is opened, allowing the fresh air passage into the exhaust duct 23 to open; conversely, when the first blade 31 is open, the second blade 314 is closed, and hot air enters the circulation passage.

[0076] A touch switch 312 is also installed at one end of the shunt box 30 corresponding to the first long connecting rod 33 (e.g., Figure 2 As shown, a diverter plate 24 is rotatably installed inside the exhaust duct 23. A rotating shaft on one side of the diverter plate 24 extends through the outside of the exhaust duct 23 and is fixedly connected to the output end of the motor 25. The motor 25 is fixedly installed on the side wall of the exhaust duct 23, and a trigger switch 312 is electrically connected to the motor 25. When the first long connecting rod 33 moves to a specific position, the trigger switch 312 is triggered, the motor 25 starts, and drives the diverter plate 24 to rotate, assisting in switching the airflow direction inside the exhaust duct 23.

[0077] Example 6: Wind-driven cleaning mechanism

[0078] like Figure 6-9 As shown, the cleaning mechanism 50 includes two cleaning plates 51, which are respectively disposed on both sides (windward side and leeward side) of the moisture absorption element 41. Each cleaning plate 51 has a sliding shaft 52 fixedly connected to its upper and lower ends. The sliding shaft 52 is a horizontally arranged round rod, and its two ends slide through the protrusions 515 fixed to the side wall of the support frame 42, so that the cleaning plate 51 can slide back and forth in the horizontal direction (perpendicular to the airflow direction).

[0079] A U-shaped block 53 is fixedly connected to one end of each sliding shaft 52. A first slider 54 is slidably connected in the U-shaped groove of the U-shaped block 53. The first slider 54 is rotatably connected to one end of the swing link 55. The other end of the swing link 55 is rotatably connected to the mounting plate 58. The mounting plate 58 is a vertically arranged fixed plate, and its end is fixedly connected to the outer wall of the diversion box 30 through the mounting plate support frame 59.

[0080] A groove 551 is provided in the middle of the swing link 55. A second slider 56 is slidably connected inside the groove 551. One side of the second slider 56 is rotatably connected to the eccentric side of the circular block 57 (i.e., the eccentric position of the circular block 57). The central axis of the circular block 57 is rotatably connected to one side of the mounting plate 58, so that the circular block 57 can rotate around its central axis.

[0081] The central shafts of the upper and lower circular blocks 57 rotate through the mounting plate 58 and are connected by a toothed belt 510. The toothed belt 510 is a synchronous belt, with one end (the driving end) connected to the central shafts of the upper and lower circular blocks 57, and a toothed pulley 511 connected to one side of the middle section. An impeller 512 is fixedly connected to the front side of the toothed pulley 511, and the rear side of the toothed pulley 511 is rotatably connected to the impeller bracket 514. One side of the impeller bracket 514 is fixedly connected to the airflow guide duct 513, which is fixedly installed on the rear side (outlet side) of the moisture absorption element 41.

[0082] The airflow duct 513 is an arc-shaped guide plate structure. One end of it is connected to the airflow channel inside the distribution box 30, and the other end extends to the vicinity of the impeller 512. It is used to guide part of the airflow inside the distribution box 30 to the impeller 512.

[0083] The working principle of the cleaning mechanism 50 is as follows: the airflow in the diversion box 30 is guided by the guide duct 513 and blown towards the impeller 512, driving the impeller 512 to rotate. The impeller 512 drives the upper and lower circular blocks 57 to rotate synchronously and eccentrically through the transmission of the toothed pulley 511 and the toothed belt 510. The eccentric rotation of the circular blocks 57 drives the swing linkage 55 to swing back and forth around its connection point with the mounting plate 58 through the sliding of the second slider 56 in the slide groove 551. The swing of the swing linkage 55 is converted into the reciprocating linear motion of the sliding shaft 52 and the cleaning plate 51 in the horizontal direction through the cooperation of the first slider 54 and the U-shaped block 53, so that the cleaning plate 51 repeatedly wipes the surface of the moisture absorption element 41 to remove the dust and debris attached to the surface of the moisture absorption element 41.

[0084] Example 7: Working Process and Mode Switching

[0085] The working process of this device is as follows:

[0086] Initial state (circulation mode): The hot air blower 20 starts, generating hot air that is sent into the drying chamber 21. After drying the printed materials on the conveyor belt, the hot air carries water vapor and some heat into the distribution box 30. At this time, the moisture absorption element 41 is in a dry state, relatively light, and has not reached the trigger threshold. The first blade 31 in the distribution box 30 is in the open state (connecting to the return pipe 22), and the second blade 314 is in the closed state (blocking the passage of the exhaust pipe 23). The hot air enters the ventilation chamber 11 below the conveyor belt through the return pipe 22, provides auxiliary heating to the conveyor belt and the bottom of the carton, and then returns to the return air port of the hot air blower 20 through the exhaust pipe 23, realizing the recycling of hot air.

[0087] Triggering state (switching to fresh air mode): As the number of cycles increases, the water vapor content in the hot air gradually increases, and the moisture-absorbing element 41 continuously absorbs moisture, gradually increasing its weight. When the weight of the moisture-absorbing element 41 reaches a preset threshold, the piston rod 431 is pressed down, and the liquid pressure in the cylinder 43 rises to a critical value that causes the spring 45 to suddenly deform. The spring 45 bends in the opposite direction instantaneously, pushing the push rod 46 and the lever 47 to swing, driving the main shaft 49 to move through the floating connecting frame 48. The first gear 410 and the second gear 411 roll on the fixed rack and the movable rack, respectively, amplifying the small swing of the lever into a large stroke displacement of the second rack 414.

[0088] The second rack 414 pulls the second long connecting rod 38 via the first traction line 418, causing all the first blades 31 to rotate synchronously and close (blocking the return pipe 22). Simultaneously, through the linkage of the second traction line 424, the first long connecting rod 33 is pulled, causing all the second blades 314 to rotate synchronously and open (opening the exhaust pipe 23). At this time, the high-humidity exhaust gas is discharged through the exhaust pipe 23, while fresh air from outside is heated by the hot air blower 20 and then enters the system, achieving "dehumidification and fresh air replenishment."

[0089] Reset State (Switching Back to Circulation Mode): After fresh air is introduced, the humidity of the hot air in the system gradually decreases. The moisture-absorbing element 41 begins to lose water and dry under the blowing of the lower humidity hot air, and its weight gradually decreases. When the weight of the moisture-absorbing element 41 falls below the threshold, the piston rod 431 retracts, the liquid pressure in the liquid column 44 decreases, the spring plate 45 returns to its original shape under its own elasticity, the lever 47 swings in the opposite direction, and through the reverse action of the above transmission chain, the second rack 414 resets, the first blade 31 reopens, the second blade 314 closes again, and the system switches back to circulation mode.

[0090] During the above process, the cleaning mechanism 50 works continuously: the airflow in the diversion box 30 drives the impeller 512 to rotate, and through the eccentric transmission of the toothed belt 510 and the round block 57, the cleaning plate 51 reciprocates, continuously cleaning the dust and debris on the surface of the moisture absorption element 41, ensuring the long-term stability of the moisture absorption performance of the moisture absorption element 41.

[0091] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0092] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A high-efficiency drying and heat recovery integrated mechanical device for a printing press unit, comprising a conveying mechanism (10), wherein a drying box (21) is installed across the upper part of the conveying mechanism (10), one side of the drying box is connected to the air outlet of a hot air blower (20), the other side of the drying box is connected to one end of a distribution box (30), the other end of the distribution box (30) is connected to one end of a return pipe (22), the other end of the return pipe (22) is connected to a ventilation cavity (11) penetrating the side of the conveying mechanism (10), the other end of the ventilation cavity (11) is connected to one side of an exhaust pipe (23), and the top of the exhaust pipe (23) is connected to the bottom return air outlet of the hot air blower (20), characterized in that, Also includes: An adjustment mechanism (40) is located on one side of the diversion box (30) and controls the opening and closing of the airflow passage inside the diversion box (30) through the cooperation of a sensing element and a linkage component; A cleaning mechanism (50) is provided on one side of the sensing element of the adjustment mechanism (40) for cleaning dust and debris from the surface of the sensing element.

2. The integrated high-efficiency drying and heat recovery mechanical device for a printing press unit as described in claim 1, characterized in that: The diversion box (30) includes multiple sets of first blades (31) and second blades (314) arranged symmetrically. The upper and lower ends of the multiple sets of first blades (31) and second blades (314) are rotatably connected to the upper and lower inner walls of the diversion box (30) by the central rotating shafts at both ends. One end of the first blade (31) and the second blade (314) rotatably passes through the outer wall of the diversion box (30) and is respectively fixed to one end of the second short connecting rod (37) and the first short connecting rod (32). The other end of the second short connecting rod (37) and the first short connecting rod (32) are respectively rotatably connected to one side of the second long connecting rod (38) and the first long connecting rod (33).

3. The integrated high-efficiency drying and heat recovery mechanical device for a printing press unit as described in claim 2, characterized in that: One side of the second long connecting rod (38) is fixed to one end of the second crank (39), the other end of the second crank (39) is fixed to one end of the second spring (310), the other end of the second spring (310) is fixed to the second fixing block (311), the second fixing block (311) is fixed to the outer wall of the diversion box (30), one side of the first long connecting rod (33) is fixed to one end of the first crank (34), the other end of the first crank (34) is fixed to one end of the first spring (35), the other end of the first spring (35) is fixed to the first fixing block (36), the first fixing block (36) is fixed to the outer wall of the diversion box (30).

4. The high-efficiency drying and heat recovery integrated mechanical device for a printing press unit as described in claim 1, characterized in that: The adjustment mechanism (40) includes a moisture-absorbing element (41), which is slidably installed inside the support frame (42). The upper and lower ends of the support frame (42) are fixed inside the diversion box (30). The bottom end of the moisture-absorbing element (41) abuts against one end of the piston rod (431). The other end of the piston rod (431) slides through the bottom end of the support frame (42) and is slidably sealed inside the liquid cylinder (43). The tail end of the liquid cylinder (43) is fixedly connected to one side of the liquid column (44), and the liquid column (44) is fixedly embedded in the bottom of the diversion box (30).

5. The integrated high-efficiency drying and heat recovery mechanical device for a printing press unit as described in claim 4, characterized in that: The liquid column (44) has an opening at its bottom, which is sealed by a spring plate (45). The outer side of the spring plate (45) abuts against one end of the push rod (46). The other end of the push rod (46) is fixed to one end of the lever (47). The fulcrum of the lever (47) is fixed to the bottom wall of the liquid column (44). The lever (47) rotates around the fulcrum. The other end of the lever (47) is symmetrically fixed with two floating connecting frames (48). A first gear (410) and a second gear (411) are movably installed between the two connecting frames (48). The first gear (410) and the second gear (411) are respectively connected to the first gear (410) and the second gear (411). A main shaft (49) is coaxially fixed to the center. Both ends of the main shaft (49) are movably inserted into the connecting frame (48). A first rack (412) is meshed with one side of the first gear (410). A rack support frame (413) is fixed to both sides of the first rack (412). The bottom end of the rack support frame (413) is fixed to the bottom of the liquid column (44). A second rack (414) is meshed with one side of the second gear (411). The second rack (414) is slidably connected to a groove on one side of the limiting slide (415). The bottom of the limiting slide (415) is fixed to the bottom of the liquid column (44).

6. The integrated high-efficiency drying and heat recovery mechanical device for a printing press unit as described in claim 5, characterized in that: The limiting slide (415) is fixedly connected to one side of a first roller bracket (416), and a first roller (417) is rotatably mounted on one side of the first roller bracket (416). A first traction line (418) is rolled around the top of the first roller (417). One end of the first traction line (418) is fixedly connected to the bottom end of the second rack (414). The other end of the first traction line (418) is rolled around the second roller (419) and the third roller (421) in sequence and fixedly connected to one end of the second long connecting rod (38). The second roller (419) is rotatably connected to the second roller bracket (420). The second roller bracket (420) is fixedly connected to the bottom of the liquid column (44). The central shaft of the third roller (421) is fixedly connected to the bottom of the liquid column (44).

7. The integrated high-efficiency drying and heat recovery mechanical device for a printing press unit as described in claim 3, characterized in that: The first crank (34) end is fixed to one end of the second traction line (424), and the other end of the second traction line (424) is rolled around the fourth roller (422) and fixed to the end of the second crank (39). The fourth roller (422) is rotatably connected to the two sides of the fourth roller bracket (423), and the bottom of the fourth roller bracket (423) is fixedly connected to the bottom of the liquid column (44).

8. The high-efficiency drying and heat recovery integrated mechanical device for a printing press unit as described in claim 1, characterized in that: The cleaning mechanism (50) includes two cleaning plates (51). The upper and lower ends of the two cleaning plates (51) are fixed to sliding shafts (52) respectively. The two ends of the sliding shafts (52) slide through protrusions (515) respectively. The protrusions (515) are fixed to the side wall of the support frame (42). A U-shaped block (53) is fixed to one end of the sliding shaft (52). A first slider (54) is slidably connected in the U-shaped groove of the U-shaped block (53). The first slider (54) is rotatably connected to one end of the swing link (55). The other end of the swing link (55) is rotatably connected to the mounting plate (58). A groove (551) is opened in the middle of the swing link (55). A second slider (56) is slidably connected inside the groove (551). 6) One side is rotatably connected to the eccentric side of the circular block (57), the central shaft of the circular block (57) is rotatably connected to one side of the mounting plate (58), the end of the mounting plate (58) is fixed to the outer wall of the distribution box (30) through the mounting plate support frame (59), the central shafts of the upper and lower circular blocks (57) rotate through the mounting plate (58) and are connected to one end of the toothed belt (510), the toothed belt (510) is connected to the toothed pulley (511) on one side of the middle part, the impeller (512) is fixedly connected to the front side of the toothed pulley (511), the rear side of the toothed pulley (511) is rotatably connected to the impeller bracket (514), one side of the impeller bracket (514) is fixedly connected to the air guide duct (513), and the air guide duct (513) is fixedly installed on the rear side of the moisture absorption element (41).

9. The integrated mechanical device for high-efficiency drying and heat recovery of a printing press unit as described in claim 1, characterized in that: The diversion box (30) is equipped with a touch switch (312) at one end of the first long connecting rod (33). The diversion plate (24) is rotatably installed inside the exhaust pipe (23). The rotating shaft of one side of the diversion plate (24) passes through the outside of the exhaust pipe (23) and is fixed to the output end of the motor (25). The motor (25) is fixedly installed on the side wall of the exhaust pipe (23). The touch switch (312) is electrically connected to the motor (25).

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