A heat energy saving circulating device for drying furnace for printing and coating of a pop can cover

Abstract

The present application relates to a kind of easy open can cover printing with drying furnace heat energy-saving circulating device, belong to easy open can cover printing with drying equipment technical field, including drying assembly and mobile tray, easy open can cover is placed on mobile tray, mobile tray is slidably set on drying rack, drying assembly includes drying plate, drying plate is opened with drying slot hole, drying plate is set in the top of drying shell, the inner diameter size of drying slot hole is greater than the diameter size of easy open can cover, drying slot hole is used to the surface of easy open can cover and its edge arc top surface is treated with drying;Mobile tray is opened with coaxially arranged storage groove ring and spout groove ring, the diameter size of storage groove ring is greater than the diameter size of easy open can cover, the diameter size of spout groove ring is equal to the diameter size of easy open can cover bottom edge arc, the bottom of storage groove ring and the bottom of spout groove ring are interconnected, spout groove ring is used to the edge arc bottom surface of easy open can cover is treated with drying.

Description

Technical Field

[0001] The invention belongs to the technical field of drying equipment for printing and coating on can caps, and in particular relates to a heat energy-saving circulation device for a drying furnace for printing and coating on can caps. Background Art

[0002] To increase sales of canned beverages and enhance brand awareness, existing cans are often printed with brand-related information and elements. Furthermore, some brands even print brand-related information and elements on the can lids. After printing and coating the can lids, they must be dried to ensure the coating adheres properly.

[0003] For example, the utility model patent with patent authorization announcement number: CN218287134U discloses a high-efficiency drying equipment for metal printing, including a workbench, a drying box fixedly connected to the top of the workbench, a shell fixedly connected to the top of the drying box, a blower connected to the top of the shell, and a first support frame fixedly connected to the left side of the top of the workbench.

[0004] Based on the search of the above patent authorization announcement number and the shortcomings found therein:

[0005] Since the lid edge of the can lid adopts an arc bending structure design, when the existing drying equipment dries the can lid from top to bottom, the bottom of the lid edge of the can lid cannot be directly dried by the drying equipment. This requires extending the overall drying time of the can lid by the drying equipment and indirectly transferring heat to the bottom of the lid edge of the can lid to achieve the purpose of drying the bottom of the lid edge of the can lid, thereby reducing the drying speed and efficiency of the drying equipment for the can lid. Summary of the Invention

[0006] In order to solve the problem that the arc bending structure of the lid edge of the can lid is adopted, when the existing drying equipment dries the can lid from top to bottom, the bottom of the lid edge of the can lid cannot be directly dried by the drying equipment, and it is necessary to extend the overall drying time of the can lid by the drying equipment and indirectly transfer heat to the bottom of the lid edge of the can lid, so as to achieve the purpose of drying the bottom of the lid edge of the can lid, thereby reducing the drying speed and efficiency of the drying equipment for the can lid. The present invention provides a heat energy-saving circulation device for a drying furnace for printing and coating can lids.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A heat energy-saving circulation device for a drying furnace for printing and coating can lids, comprising a drying rack and a drying shell, wherein the drying shell is buckled onto the drying rack, and is characterized in that it also comprises a drying assembly and a movable tray, the can lids are placed on the movable tray, the movable tray is slidably arranged on the drying rack, the drying assembly comprises a drying plate and a drying unit, the drying plate is provided with a drying slot, the drying plate is arranged at the top of the drying shell, the drying unit is communicated with the drying slot, the central axis of the drying slot coincides with the central axis of the can lid, the inner diameter of the drying slot is larger than the diameter of the can lid, and the drying slot is used to dry the surface of the can lid and the top surface of the edge arc;

[0009] The movable tray is provided with a coaxially arranged receiving groove ring and an ejecting groove ring, the central axis of the receiving groove ring coincides with the central axis of the drying slot hole, and the receiving groove ring and the ejecting groove ring are both communicated with the interior of the drying shell, the diameter of the receiving groove ring is larger than the diameter of the can cover, the diameter of the ejecting groove ring projected onto the can cover is equal to the diameter of the edge arc of the can cover, the bottom of the receiving groove ring and the bottom of the ejecting groove ring are communicated with each other, and the ejecting groove ring is used to dry the bottom surface of the edge arc of the can cover.

[0010] As a preferred technical solution of the present invention, the movable pallet also includes a receiving slot and an ejection slot. The receiving slot is coaxially arranged at the bottom of the receiving slot ring, and the ejection slot is coaxially arranged at the bottom of the ejection slot ring. The receiving slot and the ejection slot are coaxially connected to each other.

[0011] As a preferred technical solution of the present invention, the drying unit includes a heating device, a drying pump and a drying tube. The heating device and the drying pump are both arranged on the drying shell. The drying pump and the heating device are interconnected, and the two ends of the drying tube are respectively interconnected with the other end of the heating device and the drying slot.

[0012] As a preferred technical solution of the present invention, the ejection groove ring is arranged at an angle, the ring diameter of the ejection groove ring increases gradually from top to bottom, the maximum diameter size of the projection shape of the ejection groove ring projected on the can cover is larger than the diameter size of the can cover, and the minimum diameter size of the projection shape of the ejection groove ring projected on the bottom surface of the can cover is smaller than the diameter size of the can cover.

[0013] As a preferred technical solution of the present invention, it also includes a filter assembly, which includes a filter housing, two insulation tubes and activated carbon. The filter housing is arranged at the bottom of the drying machine frame, and the surface of the filter housing is on the same horizontal plane as the bottom surface of the movable tray. The filter housing is provided with a filter slot, and the activated carbon is arranged in the filter slot. The two insulation tubes are arranged in the filter housing. The bottom surface of the movable tray is further provided with two communicating holes, and the two communicating holes correspond to the receiving slot and the ejection slot respectively. Any one of the communicating holes is interconnected with the center of the receiving slot, and the other communicating hole is interconnected with the center of the ejection slot.

[0014] The two insulation tubes are matched with the two connecting holes respectively. Any insulation tube is connected to the corresponding connecting hole and one end of the filter slot hole, and the other insulation tube is connected to the other connecting hole and the other end of the filter slot hole.

[0015] As a preferred technical solution of the present invention, it also includes a heating module, which is arranged in the insulation pipe interconnected with the ejection slot.

[0016] As a preferred technical solution of the present invention, it further includes two sets of positioning assemblies, the two sets of positioning assemblies and the two communicating holes are matched one-to-one, and any one of the positioning assemblies is arranged on the corresponding communicating hole; the positioning assembly also includes a positioning magnet, a return spring and a sealing unit, the positioning magnet is arranged in a liftable manner in the communicating hole, the return spring is arranged in the communicating hole, the two ends of the return spring are respectively connected to the positioning magnet and the movable tray, and the sealing unit is arranged in the thermal insulation tube, and the sealing unit can lock or release its sealing relationship with the thermal insulation tube;

[0017] A connecting slot is coaxially opened on the top of the thermal insulation tube. When the central axis of the connecting slot coincides with the central axis of the connecting hole, the positioning magnet will extend into the connecting slot. The positioning magnet releases the sealing cooperation relationship between the sealing unit and the thermal insulation tube through magnetic force.

[0018] As a preferred technical solution of the present invention, the sealing unit includes a sealing block, a hinge block, a sealing spring and a sealing plate. A hinge slot and a sealing slot are provided at the bottom of the thermal insulation tube. The hinge slot is respectively communicated with the sealing slot and the interior of the thermal insulation tube. The sealing block can be lifted and lowered in the sealing slot. The sealing spring is arranged in the sealing slot. The two ends of the sealing spring are respectively connected to the thermal insulation tube and the sealing block. The sealing plate is arranged in the thermal insulation tube. The middle end of the hinge block can be hingedly set on the hinge slot. One end of the hinge block is connected to the sealing plate, and the other end can be hingedly set to the bottom of the sealing block in a horizontal direction perpendicular to the axial direction of the sealing block.

[0019] As a preferred technical solution of the present invention, the positioning magnet has a rectangular shape. Along the sliding direction of the movable tray, the rear end bottom of the positioning magnet is tilted, and the vertical length of the positioning magnet gradually increases.

[0020] As a preferred technical solution of the present invention, the top arc of the ejection slot is set, and the top of the arc of the ejection slot is set tangent to the bottom of the ejection slot ring. The movable tray is also provided with a frustum hole, which is set on the bottom center of the ejection slot. The frustum hole and the connecting hole are connected to each other, and the cross-sectional diameter of the frustum hole decreases from top to bottom. The diameter of the frustum hole projected to the top of the ejection slot is equal to the diameter of the top arc of the ejection slot.

[0021] The beneficial effects of the present invention are:

[0022] The present invention is provided with a drying slot hole. Since the inner diameter of the drying slot hole is larger than the diameter of the can lid, the hot air ejected from the drying slot hole from top to bottom can dry the surface of the can lid and the top surface of the edge arc. It should be noted that since the top surface of the edge arc of the can lid is an outwardly protruding arc structure, the hot air moving from the drying slot hole to the can lid will flow along the tangent direction of the top surface of the edge arc of the can lid to the surface of the movable tray. In addition, the movable tray of the present invention is provided with a coaxially arranged receiving slot ring and an ejecting slot ring. Since the central axis of the receiving slot ring and the central axis of the drying slot hole coincide with each other, and the diameter of the receiving slot ring is larger than the diameter of the can lid, the hot air flowing to the surface of the movable tray will enter the receiving slot ring. The bottom of the storage groove ring and the bottom of the ejection groove ring are connected to each other, so the hot air flowing into the storage groove ring will flow into the ejection groove ring, and the diameter of the ejection groove ring is equal to the diameter of the arc of the bottom edge of the can cover, which makes the hot air flowing out of the ejection groove ring be ejected onto the arc of the bottom edge of the can cover, thereby directly drying the arc of the bottom edge of the can cover, accelerating the drying speed and drying efficiency of the drying device for the can cover, and solving the problem of the existing drying device performing continuous drying of the can cover, so that after the heat is transferred to the bottom of the can cover, the printing and coating on the bottom of the can cover is dried due to the increase in the heat of the bottom of the can cover, but this drying method takes too long, reducing the speed and efficiency of the factory's overall production of can covers. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0024] Figure 1 This is an overall diagram of a heat energy-saving circulation device for a drying furnace for printing and coating can lids according to the present invention;

[0025] Figure 2 This is a front view of a heat energy-saving circulation device for a drying furnace for printing and coating can lids according to the present invention;

[0026] Figure 3 This is a diagram showing the interior of a drying shell of a heat-saving circulation device of a drying furnace for printing and coating can lids according to the present invention;

[0027] Figure 4 This is a cross-sectional view of a movable tray of a heat energy-saving circulation device of a drying furnace for printing and coating can lids of the present invention;

[0028] Figure 5 This is a hot air flow circulation diagram in a closed space of a heat energy-saving circulation device of a drying furnace for printing and coating can lids of the present invention;

[0029] Figure 6This is a cross-sectional view of a filter housing of a heat energy-saving circulation device of a drying furnace for printing and coating can lids of the present invention;

[0030] Figure 7 For the present invention Figure 6 Enlarged view of point A.

[0031] Description of main symbols

[0032] In the figure: 1. Drying rack; 2. Drying shell; 3. Drying plate; 4. Moving tray; 401. Storage groove ring; 402. Ejection groove ring; 403. Storage slot; 404. Ejection slot; 405. Connecting hole; 406. Cone hole; 5. Drying unit; 501. Heating device; 502. Drying pump; 503. Drying tube; 6. Filter assembly; 601. Filter shell; 602. Insulation tube; 6021. Connecting slot; 6022. Sealing slot; 6023. Hinge slot; 603. Activated carbon; 7. Positioning assembly; 701. Positioning magnet; 702. Return spring; 703. Sealing block; 704. Hinge block; 705. Sealing spring; 706. Sealing plate; 707. Sliding block; 8. Heating module. DETAILED DESCRIPTION

[0033] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0034] See also Figure 1-Figure 7The present embodiment provides a heat energy-saving circulation device for a drying furnace for printing and coating can lids, comprising a drying rack 1 and a drying shell 2. The drying shell 2 is buckled on the drying rack 1. The drying shell 2 and the drying rack 1 together form a closed space, and also include a drying component and a movable tray 4. The can lids are placed on the movable tray 4. The can lids can be manually locked or released from the matching relationship with the movable tray 4. The movable tray 4 can be slidably arranged on the drying rack 1. The drying component includes a drying plate 3 and a drying unit 5. The drying plate 3 is provided with a drying slot hole. The drying plate 3 is arranged at the top of the drying shell 2. The drying unit 5 is connected to the drying slot hole. The central axis of the drying slot hole coincides with the central axis of the can lid. The inner diameter of the drying slot hole is larger than the diameter of the can lid. The drying slot hole is used to dry the surface of the can lid and the top surface of the edge arc; the movable tray 4 is provided with a coaxial arrangement The storage groove ring 401 and the ejection groove ring 402, the central axis of the storage groove ring 401 coincides with the central axis of the drying slot hole, and the storage groove ring 401 and the ejection groove ring 402 are both interconnected with the interior of the drying shell 2, the diameter of the storage groove ring 401 is larger than the diameter of the can cover, the diameter of the ejection groove ring 402 projected onto the can cover is equal to the diameter of the edge arc of the can cover, the bottom of the storage groove ring 401 and the bottom of the ejection groove ring 402 are interconnected, and the ejection groove ring 402 is used to dry the bottom surface of the edge arc of the can cover; it should be noted that, in the actual production process of can products, in order to increase the sales of can beverages and increase the influence of can beverage brands, existing cans are printed with brand-related information and elements. What's more, some brands will also print brand-related information and elements on the can covers. After the relevant printing and coating are completed on the can lid, the can lid needs to be dried to ensure that the coating printed on the can lid can adhere to the can lid. During the drying process of the can lid, since the edge of the can lid adopts an arc bending structure design, this structure makes the edge of the can lid present an outward protruding arc structure, which facilitates the subsequent sealing of the can lid and the can body; however, it is also this structure that makes the edge structure of the can lid not a flat curved surface structure like the side wall structure of a cylinder, but a curved surface structure that is bent outward to a certain extent. Such a structure makes the top of the edge arc of the can lid protrude outward, while the bottom of the edge arc of the can lid shrinks and bends inward.

[0035] When drying can lids with non-flat curved structures, existing drying equipment dries the can lids from top to bottom. However, since the bottom of the arc edge of the can lid cannot be directly dried by the drying device, the usual solution is to use the drying equipment to continuously dry the can lid so that the heat is transferred to the bottom of the can lid. Due to the increase in the heat of the bottom of the can lid, the printing and coating on the bottom of the can lid are dried. However, this drying method takes too long, which reduces the overall production efficiency of the can lid in the factory. speed and efficiency; based on this, the present invention is provided with a drying slot, and since the inner diameter of the drying slot is larger than the diameter of the can lid, the hot air ejected from the drying slot from top to bottom can dry the surface of the can lid and the top surface of the edge arc; it should be noted that since the top surface of the edge arc of the can lid is an outwardly protruding arc structure, the hot air moving from the drying slot to the can lid will flow along the tangent direction of the top surface of the edge arc of the can lid to the surface of the movable tray 4; in addition, the movable tray 4 of the present invention is provided with a coaxially arranged storage slot The ring 401 and the ejection groove ring 402, since the central axis of the storage groove ring 401 and the central axis of the drying slot hole coincide with each other, and the diameter of the storage groove ring 401 is larger than the diameter of the can cover, the hot air flowing to the surface of the movable tray 4 will enter the storage groove ring 401, and since the bottom of the storage groove ring 401 and the bottom of the ejection groove ring 402 are connected to each other, the hot air flowing into the storage groove ring 401 will flow into the ejection groove ring 402, and the diameter of the ejection groove ring 402 projected onto the can cover is equal to the diameter of the edge arc of the can cover, which makes the hot air from the ejection groove ring 402 The hot air flowing out of the groove ring 402 will be ejected onto the bottom surface of the edge arc of the can lid, thereby directly drying the bottom surface of the edge arc of the can lid, accelerating the drying speed and drying efficiency of the can lid by the drying device, and solving the problem that the existing drying device continuously dries the can lid, so that after the heat is transferred to the bottom of the can lid, the heat at the bottom of the can lid increases, thereby drying the printing and coating at the bottom of the can lid. However, this drying method takes too long, which reduces the speed and efficiency of the factory's overall production of can lids. In addition, by implementing a structure that circulates hot air, this solution reduces the time it takes to dry the can lid in a single cycle, thereby achieving the purpose of energy saving.

[0036] Furthermore, the mobile tray 4 of this scheme also includes a storage slot 403 and an ejection slot 404. The storage slot 403 is coaxially arranged at the bottom of the storage slot ring 401, and the ejection slot 404 is coaxially arranged at the bottom of the ejection slot ring 402. The storage slot 403 and the ejection slot 404 are coaxially connected to each other; through such an arrangement, the hot air located in the storage slot ring 401 will all enter the storage slot 403, and will eventually flow out through the center of the storage slot 403; similarly, the hot air flows into the center of the ejection slot 404 and diffuses to various places of the ejection slot ring 402, and finally the hot air is ejected through various places of the ejection slot ring 402 to various places on the bottom surface of the edge arc of the can lid. It should also be noted that in order to ensure the structural stability of the mobile pallet 4, this solution also provides a storage block and a spray block. The storage block is arranged in the storage slot 403, and the top and bottom surfaces of the storage block are respectively connected to the top and bottom surfaces of the storage slot 403. The storage block is provided with a number of first slots, and the first slots are arranged at equal intervals along the axial direction of the storage block to achieve mutual communication between the storage slot 403 and the storage slot ring 401; similarly, the spray block is arranged in the spray slot 404, and the top and bottom surfaces of the spray block are respectively connected to the top and bottom surfaces of the spray slot 404. The spray block is provided with a number of second slots, and the second slots are arranged at equal intervals along the axial direction of the spray block to achieve mutual communication between the spray slot 404 and the spray slot ring 402.

[0037] Specifically, the drying unit 5 of this solution includes a heating device 501, a drying pump 502 and a drying tube 503. The heating device 501 and the drying pump 502 are both arranged on the drying shell 2. The drying pump 502 is interconnected with the heating device 501, and the two ends of the drying tube 503 are respectively interconnected with the other end of the heating device 501 and the drying slot. The heating device 501 of this solution has the ability to heat, and the drying pump 502 is connected to one end of the heating device 501. As the drying pump 502 starts to work, the drying pump 502 will transfer the outside air into the heating device 501, so that the temperature of the air transferred into the heating device 501 rises. Since the two ends of the drying tube 503 are respectively interconnected with the other end of the heating device 501 and the drying slot, the air that has risen to the specified temperature will flow through the drying tube 503 into the drying slot, and finally flow to the can lid through the drying slot.

[0038] According to the description of the above embodiment, it can be known that the diameter of the ejection groove ring 402 projected onto the can lid is equal to the diameter of the bottom surface of the edge arc of the can lid. The purpose of this arrangement is to ensure that the hot air ejected from the ejection groove ring 402 can directly dry the bottom surface of the edge arc of the can lid. Generally speaking, the ejection groove ring 402 is in a vertically arranged state. After the ejection groove ring 402 in the vertical state ejects hot air for a period of time, the hot air that previously contacted the bottom surface of the edge arc of the can lid will be directed toward the can lid. The edge arc of the can lid slides in the tangential direction of the bottom surface, and the tangential direction has two directions. The first direction is the upward movement direction along the tangential direction of the arc. The hot air moving along this part will come into contact with the hot air ejected from the drying slot hole, but eventually the power of the hot air ejected from the drying slot hole will be stronger than the power of the hot air ejected from the ejection slot ring 402. Then, this part of the hot air will follow the hot air ejected from the drying slot hole due to inertia and move into the storage slot ring 401, thus realizing a new round of circulation. The second direction is the downward movement direction along the tangent direction of the arc. The hot air moving along this part will eventually come into contact with the hot air ejected from the ejection groove ring 402 again. However, since the hot air ejected from the drying slot hole passes through the path of the receiving groove ring 401 and the ejection groove ring 402, the power of the hot air ejected from the ejection groove ring 402 has been weakened a lot. At this time, after coming into contact with the original part of the hot air, the flow directions of the two are different, which leads to turbulence of the hot air after the two parts of the hot air come into contact with each other, which eventually affects the drying effect of the hot air ejected from the ejection groove ring 402 on the arc of the bottom edge of the can lid. Based on this, the ejection groove ring 402 of this scheme is tilted, and the ring diameter of the ejection groove ring 402 increases gradually from top to bottom, and the maximum projection shape of the ejection groove ring 402 projected on the bottom surface of the can lid is The diameter size is larger than the diameter size of the can cover, and the minimum diameter size of the projection shape of the ejection groove ring 402 projected on the bottom surface of the can cover is smaller than the diameter size of the can cover; through such a setting, since the ejection slot hole 404 is inclined, the hot air ejected from the ejection slot hole 404 to the arc of the bottom edge of the can cover continues to move upward in the tangent direction of the arc of the bottom edge of the can cover under the action of inertia, and then this part of the hot air will eventually come into contact with the hot air ejected from the drying slot hole, and then this part of the hot air will follow the hot air ejected from the drying slot hole due to inertia and move into the storage groove ring 401, realizing a new round of circulation; compared with the vertically arranged ejection groove ring 402, the inclined ejection groove ring 402 has a better drying effect on the arc of the bottom edge of the can cover.

[0039] In addition, it is worth mentioning that when the drying device dries the printing on the can lid, the printing will produce organic gas. In the actual production process, the organic gas needs to be filtered. Based on this, the present solution also includes a filter assembly 6, which includes a filter housing 601, two insulation tubes 602 and activated carbon 603. The filter housing 601 is arranged at the bottom of the drying rack 1. The filter housing 601 is located in a closed space. The surface of the filter housing 601 is on the same horizontal plane as the bottom surface of the movable tray 4. The filter housing 601 is provided with a filter groove. The activated carbon 603 is arranged in the filter slot hole, and the two insulation tubes 602 are arranged in the filter housing 601. The bottom surface of the movable tray 4 is also provided with two connecting holes 405, and the two connecting holes 405 correspond to the receiving slot hole 403 and the ejection slot hole 404 respectively. Any connecting hole 405 is interconnected with the center of the receiving slot hole 403, and the other connecting hole 405 is interconnected with the center of the ejection slot hole 404; the two insulation tubes 602 are matched with the two connecting holes 405 one by one, and any insulation tube 602 is matched with the corresponding connecting hole 405 and one of the filter slot holes The ends are connected to each other, and another insulation tube 602 is connected to another connecting hole 405 and the other end of the filter slot hole; by providing a filter assembly 6, when the drying slot hole pumps the hot air to the surface of the can cover and the top surface of the edge arc, the printed organic gas on the surface of the can cover and the top surface of the edge arc will overflow and enter the receiving groove ring 401 together with the hot air. Since the two ends of an insulation tube 602 are respectively connected to one end of the filter slot hole and the receiving groove ring 401, the hot air in the receiving groove ring 401 will pass through the filter slot hole, thereby achieving hot air The organic gas inside is adsorbed on the activated carbon 603, and then the hot air in the filter slot will move to the ejection slot 404 through another insulation tube 602, and then the ejection slot 404 will spray the hot air to the bottom of the edge arc of the can lid. After drying, organic gas will also be generated at this position. The organic gas and the hot air ejected from the ejection slot 404 will contact with the hot air ejected from the drying slot, and will eventually move together to the storage slot ring 401. While the hot gas undergoes a new round of circulation, the organic gas in the hot gas will also be filtered.

[0040] At the same time, it should also be noted that in order to ensure that the temperature of the hot gas ejected from the ejection groove ring 402 still meets the requirements, this solution is also provided with a heating module 8. The heating module 8 is arranged in an insulating tube 602 that is interconnected with the ejection slot hole 404, and is used to perform a new round of heating treatment on the hot gas passing through the filter slot hole, so that the temperature of the gas after the filtration can reach a temperature that meets the requirements.

[0041] According to the description of the above embodiment, the movable tray 4 of this solution can be slidably arranged on the drying rack 1. Only when the movable tray 4 moves to the specified position can the communication hole 405 arranged on the movable tray 4 and the corresponding insulation pipe 602 be ensured to be connected with each other; however, in order to prevent the hot air in the drying rack 1 from flowing into the filter slot hole through the insulation pipe 602 during the period when the movable tray 4 has not moved to the specified position, thereby causing the organic gas attached to the activated carbon 603 to flow back to the drying rack 1 through another insulation pipe 602. The situation occurs in the dry rack 1; based on this, the present solution also includes two sets of positioning components 7, the two sets of positioning components 7 and the two connecting holes 405 are matched one by one, and any positioning component 7 is arranged on the corresponding connecting hole 405; the positioning component 7 also includes a positioning magnet 701, a return spring 702 and a sealing unit, the positioning magnet 701 can be lifted and arranged in the connecting hole 405, the return spring 702 is arranged in the connecting hole 405, the two ends of the return spring 702 are respectively connected to the positioning magnet 701 and the movable tray 4, and the sealing unit is arranged at At the bottom of the heat-insulating tube 602, the sealing unit can lock or release its sealing cooperation relationship with the heat-insulating tube 602; a connecting slot 6021 is coaxially opened on the top of the heat-insulating tube 602. When the central axis of the connecting slot 6021 coincides with the central axis of the connecting hole 405, the positioning magnet 701 will extend into the connecting slot 6021, and the positioning magnet 701 releases the sealing cooperation relationship between the sealing unit and the heat-insulating tube 602 through magnetic force; by providing a positioning component 7, when the movable tray 4 moves to the specified position, the positioning magnet 701 will extend into the connecting slot 6021. In the through slot 6021, the distance between the positioning magnet 701 and the sealing unit decreases, and the force of the positioning magnet 701 on the sealing unit increases, so that the sealing unit releases its sealing cooperation relationship with the insulation tube 602; on the contrary, when the movable tray 4 does not move to the specified position, the distance between the positioning magnet 701 and the sealing unit is too large, so the force of the positioning magnet 701 on the sealing unit is too small to drive the sealing unit to move, so that the sealing unit always maintains its sealing cooperation relationship with the insulation tube 602.

[0042] Specifically, the sealing unit of this solution includes a sealing block 703, a hinge block 704, a sealing spring 705, a sliding block 707 and a sealing plate 706. A hinge slot 6023 and a sealing slot 6022 are provided at the bottom of the insulation tube 602. The hinge slot 6023 is communicated with the sealing slot 6022 and the interior of the insulation tube 602 respectively. The sealing block 703 can be lifted and lowered in the sealing slot 6022. The sealing spring 705 is arranged in the sealing slot 6022. The two ends of the sealing spring 705 are respectively connected to the insulation tube 602 and the sealing block 703. The sliding block 707 is slidably arranged at the bottom of the sealing block 703. The sliding direction of the sliding block 707 is perpendicular to the lifting direction of the sealing block 703. The sealing plate 706 is arranged in the insulation tube 602. The middle end of the hinge block 704 can be hingedly arranged on the hinge slot 6023. One end is connected to the sealing plate 706, and the other end is hinged to the bottom of the sliding block 707. This arrangement allows the end of the hinge block 704 close to the sealing block 703 to be hinged to the bottom of the sealing block 703 in a horizontal direction perpendicular to the axial direction of the sealing block 703. It is worth noting that the cross-sectional shape of the sealing plate 706 is consistent with the cross-sectional shape of the inside of the insulation tube 602. By providing the sealing block 703, when the positioning magnet 701 extends into the connecting slot 6021, the distance between the positioning magnet 701 and the sealing block 703 is reduced, and then the sealing block 703 moves toward the top due to the magnetic force of the positioning magnet 701, so that the hinge block 704 is transformed from its original horizontal state to an inclined state, and then the hinge block 704 drives the sealing plate 706 to rotate, thereby releasing the sealing cooperation relationship between the sealing plate 706 and the inside of the insulation tube 602. Similarly, when the positioning magnet 701 releases its fit in the connecting slot 6021, the sealing block 703 returns to its original position due to the force of the sealing spring 705, and then the hinge block 704 and the sealing plate 706 are both restored to their original positions, and the sealing plate 706 re-locks its sealing fit relationship with the insulation tube 602.

[0043] Furthermore, in order to ensure that the positioning magnet 701 releases its fitting relationship with the connecting slot 6021, the outer structure of the positioning magnet 701 of this scheme is a rectangular structure. Along the sliding direction of the moving tray 4, the rear end bottom of the positioning magnet 701 is tilted, and the vertical length of the positioning magnet 701 gradually increases; through such a setting, after the positioning magnet 701 has achieved its fitting relationship with the connecting slot 6021, in order to release the fitting relationship of the positioning magnet 701 extending into the connecting slot 6021, the moving tray 4 needs to slide in the opposite direction of the sliding direction of the forward movement, and the inclined end of the positioning magnet 701 is abutted against one end of the connecting slot 6021. As the moving tray 4 moves, the positioning magnet 701 will gradually shrink into the positioning slot, thereby achieving the release of the fitting relationship of the positioning magnet 701 extending into the connecting slot 6021. In addition, it is worth mentioning that the two positioning magnets 701 of the present solution are located on the same straight line along the sliding direction of the movable tray 4. In order to avoid the positioning magnet 701 at the front end from cooperating with the connecting slot 6021 of the other positioning magnet 701 during the movement of the movable tray 4, the lengths of the two positioning magnets 701 of the present solution are different from each other, and along the direction of movement of the movable tray 4, the length of the positioning magnet 701 at the front end is greater than the length of the positioning magnet 701 at the rear end, and the size of the connecting slot 6021 is adapted to the size of the corresponding positioning magnet 701. Such a setting can ensure that the positioning magnet 701 can only cooperate with the corresponding connecting slot 6021, and cannot cooperate with the remaining connecting slots 6021.

[0044] In addition, it should be noted that in order to ensure that the amount of hot air ejected from the ejection groove ring 402 of this scheme is consistent everywhere, the top arc of the ejection slot hole 404 of this scheme is set, and the top of the arc of the ejection slot hole 404 is tangent to the bottom of the ejection groove ring 402. The movable tray 4 is also provided with a frustum hole 406, which is set at the center of the bottom of the ejection slot hole 404. The frustum hole 406 and the connecting hole 405 are interconnected, and the cross-sectional diameter of the frustum hole 406 decreases from top to bottom, and the diameter of the frustum hole 406 projected to the top of the ejection slot hole 404 is equal to the diameter of the frustum hole 406. The hot gas at the top of the ejection slot 404 is the same as the diameter of the top arc of the ejection slot 404. With such an arrangement, the hot gas ejected from the conical hole 406 will directly move to the top of the arc of the ejection slot 404. Since the diameter of the conical hole 406 projected onto the top of the ejection slot 404 is equal to the diameter of the top arc of the ejection slot 404, the hot gas at the top of the ejection slot 404 is the same everywhere. Furthermore, due to inertia, the hot gas at the top of the ejection slot 404 will be ejected through the ejection slot ring 402, thereby achieving the consistency of the amount of hot gas ejected from the ejection slot ring 402.

[0045] It should also be noted that the drying housing 2 of this embodiment is provided with a sealing door. When the sealing door is released from its sealing engagement with the drying housing 2, the movable tray 4 can be moved outside the drying housing 2 through the opening between the sealing door and the drying housing 2 to prepare for drying the next batch of can lids. When the sealing door is locked to its sealing engagement with the drying housing 2, a closed space is formed between the drying housing 2 and the drying rack 1.

[0046] Furthermore, in order to ensure that the enclosed space of this scheme can be at a constant pressure, this scheme also includes an overflow valve and a filtering device. The drying shell 2 is provided with an overflow slot, and the overflow valve is arranged on the overflow slot. The overflow valve is connected to the filtering device through an air pipe. The filtering device is arranged outside the enclosed space. By providing the overflow valve, the air pressure in the enclosed space will gradually increase as the device continues to work. In order to ensure that the air pressure in the enclosed space increases to a certain level and then maintains the current air pressure value, this scheme is provided with an overflow valve. The excess gas in the enclosed space will overflow out of the enclosed space through the overflow valve, and since the overflowed gas may contain organic gas, the overflowed gas will pass through the filtering device to filter out the organic gas in the overflowed gas.

[0047] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A heat energy-saving circulation device for a drying furnace for printing and coating can lids, comprising a drying frame and a drying shell, wherein the drying shell is fastened to the drying frame, and characterized in that: The drying machine further comprises a drying assembly and a movable tray, wherein the can lid is placed on the movable tray, and the movable tray is slidably arranged on the drying rack, wherein the drying assembly comprises a drying plate and a drying unit, wherein the drying plate is provided with a drying slot, and the drying plate is arranged at the top of the drying shell, and the drying unit is communicated with the drying slot, wherein the central axis of the drying slot coincides with the central axis of the can lid, and the inner diameter of the drying slot is larger than the diameter of the can lid, and the drying slot is used to dry the surface of the can lid and the top surface of the edge arc; The movable tray is provided with a coaxially arranged receiving groove ring and a spraying groove ring, the central axis of the receiving groove ring coincides with the central axis of the drying slot hole, and the receiving groove ring and the spraying groove ring are both communicated with the interior of the drying shell, the diameter of the receiving groove ring is larger than the diameter of the can lid, the diameter of the spraying groove ring projected onto the can lid is equal to the diameter of the edge arc of the can lid, the bottom of the receiving groove ring and the bottom of the spraying groove ring are communicated with each other, and the spraying groove ring is used to dry the bottom surface of the edge arc of the can lid; The movable tray further comprises a receiving slot and an ejection slot, wherein the receiving slot is coaxially arranged at the bottom of the receiving slot ring, and the ejection slot is coaxially arranged at the bottom of the ejection slot ring, and the receiving slot and the ejection slot are coaxially connected to each other; The ejection groove ring is arranged obliquely, and the ring diameter of the ejection groove ring gradually increases from top to bottom. The maximum diameter of the projection of the ejection groove ring on the can cover is larger than the diameter of the can cover, and the minimum diameter of the projection of the ejection groove ring on the bottom surface of the can cover is smaller than the diameter of the can cover. The mobile tray further comprises a filter assembly, the filter assembly comprising a filter housing, two insulation tubes and activated carbon, the filter housing being disposed at the bottom of the drying rack, the filter housing being provided with a filter slot, the activated carbon being disposed within the filter slot, and the bottom surface of the movable tray being provided with two communicating holes, the two communicating holes being respectively connected to the receiving groove ring and the ejection groove ring in correspondence with each other; The two insulation tubes are matched with the two communication holes, and any one insulation tube is connected to the corresponding communication hole and one end of the filter slot, and the other insulation tube is connected to the other communication hole and the other end of the filter slot; The top arc of the ejection slot is set, and the top of the arc of the ejection slot is set tangent to the bottom of the ejection slot ring. The movable tray is also provided with a frustum hole, and the frustum hole is set on the bottom center of the ejection slot. The frustum hole and the connecting hole are connected to each other, and the cross-sectional diameter of the frustum hole decreases from top to bottom. The diameter of the frustum hole projected to the top of the ejection slot is equal to the diameter of the top arc of the ejection slot.

2. The heat energy-saving circulation device for a drying furnace for printing and coating can lids according to claim 1, characterized in that: The drying unit includes a heating device, a drying pump and a drying pipe. The heating device and the drying pump are both arranged on the drying shell. The drying pump and the heating device are connected to each other. The two ends of the drying pipe are respectively connected to the other end of the heating device and the drying slot.

3. The heat energy-saving circulation device for a drying furnace for printing and coating can lids according to claim 1, characterized in that: The surface of the filter housing and the bottom surface of the movable tray are on the same horizontal plane, and the two insulation pipes are arranged in the filter housing. Any one of the connecting holes is connected to the center of the receiving slot hole, and the other connecting hole is connected to the center of the ejection slot hole.

4. The heat energy-saving circulation device for a drying furnace for printing and coating can lids according to claim 1, characterized in that: It also includes a heating module, which is arranged in the heat insulation pipe that is interconnected with the ejection slot.

5. The heat energy-saving circulation device for a drying furnace for printing and coating can lids according to claim 1, characterized in that: The device further comprises two sets of positioning assemblies, the two sets of positioning assemblies and the two communicating holes being matched one-to-one, and any one of the positioning assemblies being arranged on the corresponding communicating hole; the positioning assemblies further comprise a positioning magnet, a return spring and a sealing unit, the positioning magnet being movably arranged in the communicating hole, the return spring being arranged in the communicating hole, the two ends of the return spring being respectively connected to the positioning magnet and the movable tray, the sealing unit being arranged in the insulating tube, and the sealing unit being capable of locking or releasing its sealing relationship with the insulating tube; A connecting slot is coaxially opened on the top of the thermal insulation tube. When the central axis of the connecting slot coincides with the central axis of the connecting hole, the positioning magnet will extend into the connecting slot. The positioning magnet releases the sealing cooperation relationship between the sealing unit and the thermal insulation tube through magnetic force.

6. The heat energy-saving circulation device for a drying furnace for printing and coating can lids according to claim 5, characterized in that: The positioning magnet has a rectangular shape. Along the sliding direction of the moving tray, the rear end bottom of the positioning magnet is tilted, and the vertical length of the positioning magnet gradually increases.

7. The heat energy-saving circulation device for a drying furnace for printing and coating can lids according to claim 5, characterized in that: The sealing unit includes a sealing block, a hinge block, a sealing spring and a sealing plate. A hinge slot and a sealing slot are provided at the bottom of the thermal insulation tube. The hinge slot is communicated with the sealing slot and the interior of the thermal insulation tube respectively. The sealing block can be lifted and lowered in the sealing slot. The sealing spring is arranged in the sealing slot. The two ends of the sealing spring are respectively connected to the thermal insulation tube and the sealing block. The sealing plate is arranged in the thermal insulation tube. The middle end of the hinge block is hingedly arranged on the hinge slot. One end of the hinge block is connected to the sealing plate, and the other end thereof can be hingedly arranged at the bottom of the sealing block in a horizontal direction perpendicular to the axial direction of the sealing block.

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