A heat retaining device for a drying machine

Abstract

This application provides a heat preservation device for a dryer, relating to the field of heat preservation devices. It includes a material hopper, with a connecting pipe fixedly connected to the outside of the hopper. A negative pressure device pipe is fixedly installed on the upper side of the connecting pipe via a flange. Two heat insulation covers are installed on the outside of the vertical section of the connecting pipe. Semicircular plates are fixedly connected to the upper and lower ends of both heat insulation covers. An arc-shaped groove is formed inside each semicircular plate. This application utilizes the cooperation between the semicircular plates, arc-shaped grooves, cavities, ring plates, gears, tooth grooves, transmission rods, drive rods, worm gears, and worm shafts to allow the ring plate to slide from the left arc-shaped groove into the right arc-shaped groove, achieving rapid locking and fixation between the two semicircular plates. Operators can quickly fix or separate the two heat insulation covers without the need for additional tools, greatly improving the efficiency of disassembly and assembly during maintenance of the heating components inside the hot air duct and shortening equipment downtime.

Description

Technical Field

[0001] This utility model relates to the field of heat preservation devices, and more specifically, to a heat preservation device for a dryer. Background Technology

[0002] A dryer is a mechanical device that uses heat energy to reduce the moisture content of materials, used for drying objects. The dryer heats the material to vaporize and release the moisture, thus obtaining a solid material with a specified moisture content.

[0003] In the prior art, Chinese utility model patent CN219624359U discloses a heat preservation device for a dryer. This device uses negative pressure suction to introduce cold air, which is then heated within a hot air duct. The hot air then enters the material bin through a connecting pipe, where it exchanges heat fully with the material to be dried, thus achieving the drying purpose. The hot air duct, as a key component for heating the air, is equipped with a heating element inside to continuously heat the flowing air. To prevent heat loss from the hot air duct, improve heat utilization efficiency, and avoid burns to operators from the high temperature of the duct's outer wall, the device incorporates heat preservation measures.

[0004] However, in practical use, the aforementioned existing technology uses an integral sleeve method to fix the insulation component to the hot air duct. That is, the insulation layer is sleeved from the end of the hot air duct and arranged along the duct body. The insulation layer and the hot air duct are a closed fixed structure. Although this fixing method can achieve basic heat insulation function, when the heating element inside the hot air duct aging, burns or other failures due to long-term high-temperature operation and needs to be repaired or replaced, the operator must completely remove the entire insulation component from the hot air duct or perform destructive disassembly in order to expose the outer wall of the hot air duct for internal work. The overall disassembly not only limits the operating space but also makes disassembly and assembly difficult. In view of this, we propose a heat preservation device for a dryer to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to solve the problem of inconvenient maintenance of the insulation devices in some dryers.

[0006] To achieve the above-mentioned objectives and improve the aforementioned problems, this utility model provides a heat preservation device for a dryer, including a material hopper. A connecting pipe is fixedly connected to the outside of the material hopper. A negative pressure device pipe is fixedly installed on the upper side of the connecting pipe via a flange. Two heat insulation covers are provided on the outside of the vertical section of the connecting pipe. Semicircular plates are fixedly connected to the upper and lower ends of the two heat insulation covers. An arc-shaped through groove is opened inside the semicircular plate. A cavity is opened inside the left semicircular plate. The cavity is connected to the adjacent arc-shaped through groove. A gear is installed inside the cavity. An annular plate is installed inside the left arc-shaped through groove. A toothed groove is opened on the inner arc surface of the annular plate. The gear is meshed with the annular plate through the toothed groove. A driving mechanism is provided between the two semicircular plates arranged longitudinally on the left side. A guiding mechanism is provided outside the heat insulation covers. A handle is fixedly connected to the outside of both heat insulation covers.

[0007] As a preferred technical solution of this application, the external connection of the connecting pipe consists of two support plates, and the heat insulation cover is located between the two support plates.

[0008] As a preferred technical solution of this application, the driving mechanism includes a transmission rod, which is rotatably connected between two semicircular plates on the left side. The upper and lower ends of the transmission rod are respectively rotatably inserted into the interior of two cavities, and the two gears are respectively fixedly sleeved on the two ends of the transmission rod.

[0009] As a preferred technical solution of this application, the driving mechanism further includes a driving rod, which is rotatably connected to the lower surface of the lower semicircular plate. The upper end of the driving rod rotatably penetrates into the interior of the lower cavity and is fixedly connected to the transmission rod. A worm gear is fixedly sleeved on the outside of the driving rod, and a worm is meshed with the outside of the worm gear.

[0010] As a preferred technical solution of this application, a protective cover is fixedly connected to the surface of the lower semicircular plate, the worm gear is rotatably connected inside the protective cover, and the left end of the worm gear rotates through the inside of the protective cover, and a crank is fixedly connected to the left end of the worm gear.

[0011] As a preferred technical solution of this application, the guiding mechanism includes a fixing plate, which is fixedly connected to the outside of two heat insulation covers respectively. A rod is fixedly connected to the surface of the left fixing plate, and a circular groove is opened inside the right fixing plate, which is adapted to the rod.

[0012] As a preferred technical solution of this application, the heat insulation cover has a filling chamber inside, and a number of anti-settlement frames are fixedly connected inside the filling chamber.

[0013] As a preferred technical solution of this application, the inner ring surface of the heat insulation cover is provided with a floating support boss.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: In the scheme of this application: 1. Through the cooperation between the semi-circular plate, arc-shaped through groove, cavity, ring plate, gear, tooth groove, transmission rod, drive rod, worm gear, worm, and other structures, the ring plate slides from the left arc-shaped through groove into the right arc-shaped through groove, realizing the quick locking and fixing between the two semi-circular plates. Operators can quickly fix or separate the two heat insulation covers without the need for additional tools, which greatly improves the disassembly and assembly efficiency of the heating components inside the hot air pipe during maintenance and shortens the equipment downtime. 2. By setting up a drive method that uses a worm gear and worm shaft, and utilizing the self-locking characteristics between the worm gear and worm shaft, once the ring plate slides to the locked position, even if continuous vibration occurs during equipment operation, the worm gear and worm shaft will not rotate in the opposite direction. This effectively ensures the stability of the transmission rod and gears, prevents the ring plate from accidentally dislodging from the arc-shaped through groove due to vibration, and ensures that the two heat insulation covers maintain a reliable locked state during long-term use. This significantly improves the operational reliability and safety of the insulation device and further enhances maintenance convenience. Attached Figure Description

[0015] Figure 1 A schematic diagram of the heat preservation device for the dryer provided in this application; Figure 2 This is a schematic diagram of the connecting pipe in the heat preservation device of the dryer provided in this application; Figure 3 A cross-sectional view of the semi-circular plate in the insulation device of the dryer provided in this application; Figure 4 A schematic diagram of the lower structure of the heat insulation cover in the heat insulation device of the dryer provided in this application; Figure 5 A cross-sectional view of the heat insulation cover in the heat insulation device of the dryer provided in this application; Figure 6 Provided for this application Figure 3 Enlarged view of point A in the middle; Figure 7 Provided for this application Figure 4 Enlarged view of point B in the middle.

[0016] The image shows: 1. Material bucket; 2. Connecting pipe; 3. Negative pressure device pipe; 4. Heat insulation cover; 5. Semicircular plate; 6. Arc-shaped through groove; 7. Cavity; 8. Ring plate; 9. Gear; 10. Gear groove; 11. Transmission rod; 12. Drive rod; 13. Worm gear; 14. Worm; 15. Protective cover; 16. Crank handle; 17. Handle; 18. Support plate; 19. Fixing plate; 20. Insert rod; 21. Suspension support boss; 22. Circular groove; 23. Filling chamber; 24. Anti-settlement frame. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0019] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] Please refer to Figures 1-7 A heat preservation device for a dryer includes a material hopper 1. A connecting pipe 2 is fixedly connected to the outside of the material hopper 1. A negative pressure device pipe 3 is fixedly installed on the upper side of the connecting pipe 2 through a flange. Two heat insulation covers 4 are provided on the outside of the vertical section of the connecting pipe 2. Semicircular plates 5 are fixedly connected to the upper and lower ends of the two heat insulation covers 4. An arc-shaped through groove 6 is opened inside the semicircular plate 5. A cavity 7 is opened inside the left semicircular plate 5. The cavity 7 is connected to the adjacent arc-shaped through groove 6. A gear 9 is provided inside the cavity 7. An annular plate 8 is provided inside the left arc-shaped through groove 6. A toothed groove 10 is opened on the inner arc surface of the annular plate 8. The gear 9 is meshed with the annular plate 8 through the toothed groove 10. A driving mechanism is provided between the two semicircular plates 5 arranged longitudinally on the left. A guiding mechanism is provided on the outside of the heat insulation covers 4. A handle 17 is fixedly connected to the outside of the two heat insulation covers 4.

[0022] With this setup, the rotation of gear 9 can drive the ring plate 8 to slide inside the left arc-shaped through groove 6. Subsequently, the ring plate 8 will slide into the right arc-shaped through groove 6, thus achieving the fixation between the two adjacent heat insulation covers 4.

[0023] Furthermore, such as Figures 1-7 As shown, the external connection of the connecting pipe 2 consists of two support plates 18, and the heat insulation cover 4 is located between the two support plates 18.

[0024] With this configuration, the support plate 18 can play a positioning and supporting role when assembling the heat insulation cover 4, further improving the convenience of assembling and disassembling the heat insulation cover 4.

[0025] Furthermore, such as Figures 1-7 As shown, the drive mechanism includes a transmission rod 11, which is rotatably connected between two semicircular plates 5 on the left side. The upper and lower ends of the transmission rod 11 are respectively rotatably inserted into the interior of two cavities 7, and two gears 9 are respectively fixedly sleeved on the two ends of the transmission rod 11.

[0026] With this setup, the rotation of the transmission rod 11 can drive the rotation of the two gears 9, thereby achieving stable transmission.

[0027] Furthermore, such as Figures 1-7 As shown, the drive mechanism also includes a drive rod 12, which is rotatably connected to the lower surface of the lower semicircular plate 5. The upper end of the drive rod 12 rotatably penetrates into the interior of the lower cavity 7 and is fixedly connected to the transmission rod 11. A worm gear 13 is fixedly sleeved on the outside of the drive rod 12, and a worm 14 is meshed with the outside of the worm gear 13.

[0028] With this configuration, the rotation of the worm 14 can drive the rotation of the worm wheel 13, which in turn drives the rotation of the transmission rod 11. Furthermore, the self-locking property of the worm wheel 13 and the worm 14 effectively ensures the stability of the transmission rod 11 and the gear 9, and effectively prevents them from rotating on their own.

[0029] Furthermore, such as Figures 1-7 As shown, a protective cover 15 is fixedly connected to the surface of the lower semicircular plate 5, and a worm gear 14 is rotatably connected inside the protective cover 15. The left end of the worm gear 14 rotates through the inside of the protective cover 15, and a crank handle 16 is fixedly connected to the left end of the worm gear 14.

[0030] With this setup, the crank handle 16 makes it easier for staff to drive the worm gear 14 to rotate, thereby improving the ease of operation.

[0031] Furthermore, such as Figures 1-7 As shown, the guide mechanism includes a fixed plate 19, which is fixedly connected to the outside of the two heat insulation covers 4 respectively. A rod 20 is fixedly connected to the surface of the left fixed plate 19, and a circular groove 22 is opened inside the right fixed plate 19. The circular groove 22 and the rod 20 are compatible.

[0032] With this setup, when installing the two heat insulation covers 4, the insert rod 20 can be inserted into the inside of the circular groove 22. This not only guides the heat insulation cover 4, but also uses the friction between the insert rod 20 and the circular groove 22 for initial fixation. After the ring plate 8 enters the arc-shaped through groove 6 on the other side, the heat insulation cover 4 is fixed a second time.

[0033] Furthermore, such as Figures 1-7 As shown, the heat insulation cover 4 has a filling chamber 23 inside, and several anti-settlement frames 24 are fixedly connected inside the filling chamber 23.

[0034] Among them, the anti-settlement frame 24 is fixedly installed at a certain distance along the axial direction of the heat insulation cover 4. The anti-settlement frame 24 divides the long strip-shaped filling chamber 23 into multiple independent sub-chambers. Each sub-chamber is independently filled with a certain amount of nano-aerogel felt or high-temperature resistant insulation cotton, thereby effectively preventing the insulation cotton inside the heat insulation cover 4 from gradually sinking and compacting due to equipment vibration.

[0035] Furthermore, such as Figures 1-7 As shown, the inner ring surface of the heat insulation cover 4 is provided with a floating support boss 21.

[0036] With this setup, when the heat insulation cover 4 is installed, the suspended support boss 21 makes line contact or small-area point contact with the outer wall of the heating section of the connecting pipe 2, so that a ring-shaped air heat insulation buffer layer with a thickness of 2-5mm is formed between the outer wall and the inner protective plate.

[0037] The usage process of the heat preservation device for the dryer provided by this utility model is as follows: First, in the initial state, the two heat insulation covers 4 are in an open and separated state, respectively placed on both sides of the heating section of the connecting pipe 2. When it is necessary to cover the heating section of the connecting pipe 2 with insulation, the operator holds the handles 17 on both sides and closes the two heat insulation covers 4 together in the radial direction of the connecting pipe 2. During this process, the insertion rod 20 in the guide mechanism is gradually inserted into the circular groove 22 inside the right fixed plate 19 under the support of the left fixed plate 19. The friction between the insertion rod 20 and the circular groove 22 forms a preliminary fixation, and at the same time guides and limits the closing action of the two heat insulation covers 4, ensuring that the two heat insulation covers 4 can be accurately connected.

[0038] When the two heat shields 4 are closed in place, the semicircular plates 5 fixedly connected at the upper and lower ends of the two heat shields 4 abut against each other. The arc-shaped through groove 6 inside the left semicircular plate 5 and the arc-shaped through groove 6 inside the right semicircular plate 5 are aligned and connected. At this time, the operator turns the crank handle 16, which drives the worm gear 14 to rotate inside the protective cover 15. The worm gear 14 drives the worm wheel 13 that meshes with it to rotate. The worm wheel 13 drives the drive rod 12 to rotate. The drive rod 12 transmits power to the transmission rod 11. The transmission rod 11 synchronously drives the two gears 9 fixedly sleeved at its upper and lower ends to rotate.

[0039] Since gear 9 is meshed with ring plate 8 through tooth groove 10, and ring plate 8 is slidably set inside arc-shaped through groove 6 of left semicircular plate 5, when gear 9 rotates, it drives ring plate 8 to slide along the arc-shaped path of arc-shaped through groove 6 through tooth groove 10. Ring plate 8 gradually extends out from arc-shaped through groove 6 of left side, crosses the joint of two semicircular plates 5, and slides into arc-shaped through groove 6 inside right semicircular plate 5. When ring plate 8 is simultaneously located in arc-shaped through grooves 6 on both sides, it locks and fixes the two semicircular plates 5 radially, thereby firmly closing the two heat insulation covers 4 into one, achieving complete wrapping of the heating section of connecting pipe 2.

[0040] During this process, the self-locking characteristic of the worm gear 13 and worm 14 can effectively prevent the transmission rod 11 and gear 9 from rotating in the opposite direction, ensuring that the ring plate 8 remains stable in the locked position and avoiding accidental dislodgement of the ring plate 8 due to vibration or other factors.

[0041] When it is necessary to disassemble the heat insulation cover 4 for internal maintenance, simply turn the crank handle 16 in the opposite direction. Through the reverse transmission of the worm 14, worm wheel 13, drive rod 12, transmission rod 11 and gear 9, the drive ring plate 8 slides in the opposite direction, exits from the right arc-shaped through groove 6 and resets to the left arc-shaped through groove 6, releasing the locking state, and the two heat insulation covers 4 can be easily separated.

[0042] In addition, the suspended support boss 21 forms a line contact with the outer wall of the connecting pipe 2 after the heat insulation cover 4 is closed, forming an annular air heat insulation buffer layer between the inner wall of the heat insulation cover 4 and the outer wall of the connecting pipe 2; the anti-settlement skeleton 24 divides the filling chamber 23 into multiple independent sub-chambers, each of which is independently filled with nano aerogel felt or high-temperature resistant insulation cotton, effectively preventing the insulation material from settling.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A heat preservation device for a dryer, characterized in that, Includes a material bucket (1), to which a connecting pipe (2) is fixedly connected. A negative pressure device pipe (3) is fixedly installed on the upper side of the connecting pipe (2) via a flange. Two heat insulation covers (4) are provided on the outside of the vertical section of the connecting pipe (2). Semicircular plates (5) are fixedly connected to the upper and lower ends of the two heat insulation covers (4). An arc-shaped through groove (6) is opened inside the semicircular plate (5). A cavity (7) is opened inside the left semicircular plate (5). The cavity (7) and the adjacent arc The shaped through groove (6) is connected, and a gear (9) is provided inside the cavity (7). An annular plate (8) is provided inside the arc-shaped through groove (6) on the left side. The inner arc surface of the annular plate (8) is provided with a tooth groove (10). The gear (9) is meshed with the annular plate (8) through the tooth groove (10). A driving mechanism is provided between the two semi-circular plates (5) arranged longitudinally on the left side. A guide mechanism is provided outside the heat insulation cover (4). A handle (17) is fixedly connected to the outside of both heat insulation covers (4).

2. The heat preservation device for a dryer according to claim 1, characterized in that, The connecting pipe (2) is externally fixedly connected to two support plates (18), and the heat insulation cover (4) is located between the two support plates (18).

3. The heat preservation device for a dryer according to claim 2, characterized in that, The driving mechanism includes a transmission rod (11), which is rotatably connected between two semicircular plates (5) on the left side. The upper and lower ends of the transmission rod (11) are respectively rotatably inserted into the interior of two cavities (7), and the two gears (9) are respectively fixedly sleeved on both ends of the transmission rod (11).

4. The heat preservation device for a dryer according to claim 3, characterized in that, The driving mechanism also includes a driving rod (12), which is rotatably connected to the lower surface of the lower semicircular plate (5). The upper end of the driving rod (12) rotatably penetrates into the interior of the lower cavity (7) and is fixedly connected to the transmission rod (11). A worm gear (13) is fixedly sleeved on the outside of the driving rod (12), and a worm (14) is meshed with the outside of the worm gear (13).

5. The heat preservation device for a dryer according to claim 4, characterized in that, A protective cover (15) is fixedly connected to the surface of the lower semicircular plate (5). The worm (14) is rotatably connected inside the protective cover (15), and the left end of the worm (14) rotates through the inside of the protective cover (15). A crank (16) is fixedly connected to the left end of the worm (14).

6. The heat preservation device for a dryer according to claim 5, characterized in that, The guiding mechanism includes a fixing plate (19), which is fixedly connected to the outside of two heat insulation covers (4). A plug rod (20) is fixedly connected to the surface of the fixing plate (19) on the left side, and a circular groove (22) is opened inside the fixing plate (19) on the right side. The circular groove (22) and the plug rod (20) are compatible.

7. The heat preservation device for a dryer according to claim 6, characterized in that, The heat insulation cover (4) has a filling chamber (23) inside, and several anti-settlement frames (24) are fixedly connected inside the filling chamber (23).

8. The heat preservation device for a dryer according to claim 7, characterized in that, The inner ring surface of the heat insulation cover (4) is provided with a floating support boss (21).

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