Sleeve type air pipe expansion device

Abstract

The utility model relates to a casing pipe type air pipe telescopic device, which belongs to the technical field of air pipes and comprises a first air pipe and a second air pipe, four side surfaces of the first air pipe are respectively and fixedly provided with a first connecting plate, and four side surfaces of the second air pipe are respectively and fixedly provided with a second connecting plate. According to the telescopic air pipe telescopic device, the first air pipe is arranged on the second air pipe in a sleeving mode, the first air pipe and the second air pipe can stretch out and draw back in the heating or cooling process, the first air pipe and the second air pipe are connected through the reset spring, and after the first air pipe and the second air pipe generate displacement after being heated or cooled, when the temperature returns to normal, the first air pipe and the second air pipe can stretch out and draw back. The problems that common air pipe joints are directly connected through traditional seaming air pipe bolts, expansion and stretching of the air pipes after high temperature are difficult to meet after fixing, and after the air pipes in the drying chamber are heated or cooled, original bolt direct connection air pipes expand and deform and cannot be repaired, and the service life of the air pipes in the drying chamber is prolonged are solved. The performance and the appearance of the equipment are influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of air ducts, in particular to a telescopic device for a sleeve-type air duct. Background Technique

[0002] The internal air supply duct of a drying chamber is a duct system used to convey hot air or cold air into the chamber during the drying process. Its main function is to evenly distribute air into the drying chamber through the air supply duct to achieve the purpose of regulating temperature, humidity, and ventilation. The air supply duct is usually connected to a fan or air conditioning system, which inhales external air and sends it into the drying chamber after heating or cooling treatment. The design and layout of the air supply duct are crucial for ensuring that air can be evenly distributed throughout the drying chamber.

[0003] The internal air supply duct of a drying chamber is widely used in occasions that require precise control of temperature and humidity, such as the food processing, chemical production, wood drying, and textile processing industries. In these applications, a reasonable air supply system design can significantly improve product quality and production efficiency. A good air supply duct design should ensure that air is evenly distributed inside the drying chamber to avoid local overheating or overcooling. The air supply system should have a certain adjustment ability to adapt to the changing needs of different drying stages. Since the drying environment may have harsh conditions such as high temperature and high humidity, the material of the air supply duct should have good heat resistance and corrosion resistance.

[0004] In common air duct connections, traditional bite-type air ducts are directly connected by bolts. After being fixed, it is difficult to meet the expansion and contraction of the air duct after high temperature. After the indoor air duct of the drying chamber is heated or cooled, the original bolt-connected air duct expands and deforms, and it is irreparable, affecting the performance and appearance of the equipment. In view of this, this application proposes a telescopic device for a sleeve-type air duct. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a telescopic device for a sleeve-type air duct, which has the advantages that the air duct can expand and contract after being heated or cooled, etc., and solves the problem that in common air duct connections, traditional bite-type air ducts are directly connected by bolts. After being fixed, it is difficult to meet the expansion and contraction of the air duct after high temperature. After the indoor air duct of the drying chamber is heated or cooled, the original bolt-connected air duct expands and deforms, and it is irreparable, affecting the performance and appearance of the equipment.

[0006] To achieve the above object, the utility model provides the following technical solution: A telescopic device for a sleeve-type air duct includes a first air duct and a second air duct. First connecting plates are fixedly installed on four side surfaces of the first air duct, second connecting plates are fixedly installed on four side surfaces of the second air duct, and a return spring is arranged between the first connecting plates and the second connecting plates;

[0007] The reset spring includes a spring body, end plates are fixedly installed at both ends of the spring body, and hooks are fixedly installed on one side of the end plates.

[0008] Further, a first connection ring is fixedly installed on one side of the first connecting plate, one of the hooks is hung on the first connection ring, a second connection ring is fixedly installed on one side of the second connecting plate, and the other hook is hung on the second connection ring.

[0009] Further, sliding guide grooves are formed on four side surfaces of the first air duct, a stud is fixedly installed on the side surface of the second air duct, and a wing nut is threadedly installed on the surface of the stud.

[0010] Further, a gasket is sleeved on the surface of the stud, the gasket is located below the wing nut, and the diameter of the gasket is larger than the diameter of the sliding guide groove.

[0011] Further, the inner diameter of the first air duct is larger than the outer diameter of the second air duct, the first air duct is sleeved on the surface of the second air duct, and a sliding gap is left between the first air duct and the second air duct.

[0012] Further, the stud is welded to one side of the second air duct according to the position of the sliding guide groove, the stud extends to the outside of the first air duct through the sliding guide groove, and the wing nut presses the gasket against one side of the first air duct.

[0013] Further, the first connecting plate is welded to one side of the first air duct, the second connecting plate is welded to one side of the second air duct, the first connecting plate and the second connecting plate are aligned, the first connection ring is welded to one side of the first connecting plate, the second connection ring is welded to one side of the second connecting plate, and the first connection ring and the second connection ring are aligned.

[0014] Compared with the prior art, the present utility model provides a telescopic device for sleeve-type air ducts, which has the following beneficial effects:

[0015] For this telescopic device for sleeve-type air ducts, by sleeving the first air duct on the second air duct, when heated or cooled, the first air duct and the second air duct can be telescoped. The first air duct and the second air duct are connected by a reset spring, so that after the first air duct and the second air duct generate displacement when heated or cooled, when the temperature returns to normal, they can return to their original positions, preventing the first air duct and the second air duct from getting stuck. This solves the problem that in common air duct joints, traditional lock-seamed air ducts are directly connected by bolts, and it is difficult to meet the expansion and contraction of the air ducts after high temperature. In a drying chamber, after the indoor air ducts are heated or cooled, the original bolt-connected air ducts expand and deform and cannot be repaired, affecting the performance and appearance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 3D schematic diagram of the structure of the present utility model;

[0018] Figure 3 Installation schematic diagram of the butterfly nut of the present utility model;

[0019] Figure 4 Installation schematic diagram of the return spring of the present utility model.

[0020] In the figure: 1. First air duct; 2. Second air duct; 3. First connecting plate; 31. First connecting ring; 4. Second connecting plate; 41. Second connecting ring; 5. Return spring; 51. Spring body; 52. End plate; 53. Hook; 6. Sliding guide groove; 7. Stud; 8. Butterfly nut; 9. Gasket. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0022] Embodiment 1: Please refer to Figures 1 to 4 , the telescopic device for the casing air duct includes a first air duct 1 and a second air duct 2. The four sides of the first air duct 1 are fixedly installed with first connecting plates 3, and the four sides of the second air duct 2 are fixedly installed with second connecting plates 4. A return spring 5 is arranged between the first connecting plate 3 and the second connecting plate 4.

[0023] Among them, the inner diameter of the first air duct 1 is larger than the outer diameter of the second air duct 2. The first air duct 1 is sleeved on the surface of the second air duct 2, and there is a sliding gap between the first air duct 1 and the second air duct 2. When the first air duct 1 and the second air duct 2 are heated or cooled, relative movement occurs, preventing deformation.

[0024] Secondly, the return spring 5 includes a spring body 51. End plates 52 are fixedly installed at both ends of the spring body 51, and hooks 53 are fixedly installed on one side of the end plates 52. The first connecting plate 3 and the second connecting plate 4 are connected by the return spring 5. After the first air duct 1 and the second air duct 2 undergo relative displacement when heated or cooled, when the temperature returns to normal, the return spring 5 pulls the first air duct 1 and the second air duct 2 back to their original positions through the first connecting plate 3 and the second connecting plate 4.

[0025] At the same time, a first connecting ring 31 is fixedly installed on one side of the first connecting plate 3, one of the hooks 53 is hung on the first connecting ring 31, a second connecting ring 41 is fixedly installed on one side of the second connecting plate 4, and the other hook 53 is hung on the second connecting ring 41.

[0026] Among them, the first connecting plate 3 is welded to one side of the first air duct 1, the second connecting plate 4 is welded to one side of the second air duct 2, the first connecting plate 3 and the second connecting plate 4 are aligned, the first connecting ring 31 is welded to one side of the first connecting plate 3, the second connecting ring 41 is welded to one side of the second connecting plate 4, and the first connecting ring 31 and the second connecting ring 41 are aligned. After the first air duct 1 and the second air duct 2 are butted, the return spring 5 is connected to the first connecting ring 31 and the second connecting ring 41 through the hooks 53 at both ends.

[0027] Embodiment 2: On the basis of Embodiment 1, sliding guide grooves 6 are provided on four side surfaces of the first air duct 1, a stud 7 is fixedly installed on the side surface of the second air duct 2, and a wing nut 8 is threadedly installed on the surface of the stud 7.

[0028] Among them, a gasket 9 is sleeved on the surface of the stud 7, the gasket 9 is located below the wing nut 8, and the diameter of the gasket 9 is larger than the diameter of the sliding guide groove 6.

[0029] Secondly, the stud 7 is welded to one side of the second air duct 2 according to the position of the sliding guide groove 6, the stud 7 extends to the outside of the first air duct 1 through the sliding guide groove 6, and the wing nut 8 presses the gasket 9 against one side of the first air duct 1. The gasket 9 is sleeved on the stud 7, and then the wing nut 8 is tightened. The pressing force of the gasket 9 is appropriate, so that the first air duct 1 and the second air duct 2 can slide without jamming.

[0030] When this embodiment is in use, after the first air duct 1 and the second air duct 2 are butted, the return spring 5 is connected to the first connecting ring 31 and the second connecting ring 41 through the hooks 53 at both ends. The gasket 9 is sleeved on the stud 7, and then the wing nut 8 is tightened. The pressing force of the gasket 9 is appropriate, so that the first air duct 1 and the second air duct 2 can slide without jamming, so that the first air duct 1 and the second air duct 2 can contract when heated or cooled, preventing the first air duct 1 and the second air duct 2 from deforming. After the temperature of the first air duct 1 and the second air duct 2 returns, the first air duct 1 and the second air duct 2 are pulled back to their original positions by the return spring 5, preventing the first air duct 1 and the second air duct 2 from getting stuck.

[0031] The electrical components mentioned in the text are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer for control, and the existing publicly disclosed power connection technology will not be elaborated in the text.

[0032] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0033] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. Sleeve type air duct expansion device, including a first air duct (1) and a second air duct (2), characterized in that: The four sides of the first air duct (1) are fixedly installed with first connecting plates (3), the four sides of the second air duct (2) are fixedly installed with second connecting plates (4), and a return spring (5) is arranged between the first connecting plate (3) and the second connecting plate (4); The return spring (5) includes a spring body (51), end plates (52) are fixedly installed at both ends of the spring body (51), and hooks (53) are fixedly installed on one side of the end plates (52).

2. The telescopic device for the sleeve-shaped air duct according to claim 1, wherein: A first connecting ring (31) is fixedly installed on one side of the first connecting plate (3), one of the hooks (53) is hung on the first connecting ring (31), a second connecting ring (41) is fixedly installed on one side of the second connecting plate (4), and the other hook (53) is hung on the second connecting ring (41).

3. The telescopic device for casing air ducts according to claim 1, characterized in that: Sliding guide grooves (6) are formed on the four sides of the first air duct (1), a stud (7) is fixedly installed on the side of the second air duct (2), and a wing nut (8) is threadedly installed on the surface of the stud (7).

4. The telescopic device for casing air ducts according to claim 3, wherein: A gasket (9) is sleeved on the surface of the stud (7), the gasket (9) is located below the wing nut (8), and the diameter of the gasket (9) is larger than the diameter of the sliding guide groove (6).

5. The telescopic device for sleeve air ducts according to claim 1, wherein: The inner diameter of the first air duct (1) is larger than the outer diameter of the second air duct (2), the first air duct (1) is sleeved on the surface of the second air duct (2), and a sliding gap is left between the first air duct (1) and the second air duct (2).

6. The telescopic device for casing air ducts according to claim 3, characterized in that: The stud (7) is welded to one side of the second air duct (2) according to the position of the sliding guide groove (6), the stud (7) extends to the outside of the first air duct (1) through the sliding guide groove (6), and the wing nut (8) presses the gasket (9) against one side of the first air duct (1).

7. The telescopic device for sleeve-shaped air ducts according to claim 1, characterized in that: The first connecting plate (3) is welded to one side of the first air duct (1), the second connecting plate (4) is welded to one side of the second air duct (2), the first connecting plate (3) and the second connecting plate (4) are aligned, the first connecting ring (31) is welded to one side of the first connecting plate (3), the second connecting ring (41) is welded to one side of the second connecting plate (4), and the first connecting ring (31) and the second connecting ring (41) are aligned.

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