Aluminum foil telescopic air outlet pipe of puncture-resistant smoke breaker

Abstract

The utility model relates to a puncture-resistant telescopic aluminum foil air outlet pipe of a smoke breaking machine, which is integrally of a corrugated pipe structure, the pipe wall is formed by spirally winding aluminum foil sheets, spiral elastic steel wires are clamped in spiral winding and stacking parts of the aluminum foil sheets, the elastic steel wire parts are wave crest parts of the corrugated pipe, and wave trough parts are arranged between the wave crest parts. In the spiral winding process of the aluminum foil pieces, at least two layers of laminated structures are arranged, the edges of the aluminum foil pieces are laminated into three layers, and the axial length of an overlapping area between the aluminum foil piece on the outermost layer and the aluminum foil piece on the innermost layer is at least 5 mm. The aluminum foil sheets can cover the two wave trough portions and the two wave crest portions, the aluminum foil sheets are mutually stacked and bonded, at least two layers of the aluminum foil sheets are stacked, the edges of the aluminum foil sheets are stacked into three layers, and therefore the whole air outlet pipe has high strength and is free of single-layer weak portions, and the anti-cracking capacity of the whole air outlet pipe is improved.

Description

Technical Field

[0001] The utility model belongs to the field of exhaust systems, and in particular relates to a puncture-resistant aluminum foil telescopic outlet duct for a range hood. Background Art

[0002] The outlet duct of a range hood is an important passage connecting the main body of the range hood and the outdoor ventilation duct, mainly functioning to discharge the oil fumes, waste gases, etc. absorbed by the range hood outdoors. Through the outlet duct, it ensures that the oil fumes can be smoothly discharged from the kitchen, keeping the kitchen air clean. At the same time, the outlet duct can also guide the flow direction of the oil fumes, improving the exhaust efficiency of the range hood.

[0003] Considering the usage situation of the outlet duct, the outlet duct needs to ensure sufficient sealing performance to avoid the leakage of oil fume gas from unsealed gaps during the exhaust process, causing air pollution and kitchen greasiness.

[0004] The outlet duct is formed by aluminum foil sheets cooperatively wound with a steel wire in a corrugated structure. However, due to the design structure of the existing outlet duct, there is an alternating structure of double layers and single layers, and the single-layer part often appears at the bent part of the wave valley. During the installation process of the existing outlet duct, stretching and bending are required to change the air outlet direction. Therefore, the aluminum foil sheet at the single-layer part will be exposed outward. At this time, it is easy to cause scratches or cracks at this part due to tools or wall holes, etc., affecting the sealing performance and service performance of the outlet duct. Summary of the Invention

[0005] The utility model solves the defect that the aluminum foil sheet is prone to scratches or cracks at the single-layer part during the installation process in the prior art, affecting the sealing performance and service performance of the outlet duct, and provides a puncture-resistant aluminum foil telescopic outlet duct for a range hood, enhancing the aluminum foil sheet used for spiral winding to improve its strength, thereby enhancing its anti-cracking ability. At the same time, the spiral winding structure is optimized to eliminate the single-layer structure and form a two-layer and three-layer overlapping structure, thereby improving the overall anti-cracking ability of the outlet duct.

[0006] The specific technical solution of the utility model is as follows: A puncture-resistant aluminum foil telescopic outlet duct for a range hood, with an overall corrugated structure, the pipe wall is formed by spiral winding of aluminum foil sheets, and a spiral elastic steel wire is clamped inside the spiral winding part of the aluminum foil sheets. The elastic steel wire part is the peak part of the corrugated pipe, and the part between the peak parts is the valley part. During the spiral winding process of the aluminum foil sheets, there is at least a two-layer overlapping structure, and the edges of the aluminum foil sheets are overlapped in three layers, and the axial length of the overlapping area between the outermost aluminum foil sheet and the innermost aluminum foil sheet is at least 5 mm.

[0007] After the aluminum foil sheets of the present application are spirally wound, the aluminum foil sheets can cover two trough parts and two peak parts. The aluminum foil sheets are stacked and bonded to each other. During the spiral winding process, the elastic steel wire is spirally wound together with them. The elastic steel wire is located between the stacked aluminum foil sheets. The present application changes the width of the aluminum foil sheets so that there are at least two layers of stacked aluminum foil sheets, and the edge layers of the aluminum foil sheets are three layers. In this way, the overall air outlet pipe has high strength, and there is no single-layer weak part, improving the overall anti-cracking ability of the air outlet pipe.

[0008] Preferably, the width of the aluminum foil sheet is greater than the sum of the lengths of two pitches, and the aluminum foil sheet covers two trough parts and two peak parts.

[0009] Preferably, the aluminum foil sheet sequentially covers the trough part, the peak part, the trough part, and the peak part starting from the edge. The edge close to the peak part is the outer layer of the three-layer stack, and the edge close to the trough part is the inner layer of the three-layer stack.

[0010] Preferably, the elastic steel wire is located at the part where two layers of aluminum foil sheets are stacked. The aluminum foil sheets of the same layer are connected to two coils of elastic steel wire, and the two coils of elastic steel wire are respectively located on the outer side and the inner side of the aluminum foil sheet of this layer.

[0011] Preferably, the aluminum foil sheet is provided with indentations that match the elastic steel wire. The convex surface of the indentation is on the side of the aluminum foil sheet facing the inside of the air outlet pipe. Glue needs to be applied between the stacked aluminum foil sheets for bonding. Indentations are provided on the aluminum foil sheet, and the positions of the indentations coincide with the positions where the elastic steel wire is spirally wound. The elastic steel wire is exactly located on the indentations. In this way, the aluminum foil sheet provides a certain limit to the elastic steel wire through the indentations, ensuring that the elastic steel wire does not separate when the air outlet pipe expands and contracts.

[0012] Preferably, the aluminum foil sheet is three-layer composite, with a reinforcing layer in the middle and aluminum foil layers on the upper and lower layers. The structure of the aluminum foil sheet is improved to be three-layer composite, with the reinforcing layer as the middle layer, and the front and back sides of the aluminum foil sheet are still aluminum foil layers, thereby improving the strength of the aluminum foil sheet.

[0013] Preferably, the thickness of the aluminum foil layers on the upper and lower layers is at least 0.58 mm; the middle layer is a polyester fiber layer.

[0014] Preferably, the edge of the aluminum foil sheet is serrated or wavy. Both the serrated shape and the wavy shape are longer than the straight shape. In this way, the glue can better penetrate into the gaps during gluing, increasing the contact area of gluing and forming more gluing points; at the same time, since the diameter of the trough part is smaller than that of the peak part, the aluminum foil sheet will produce wrinkles at the edge part, and the non-straight structure can better adapt to bending and deformation; the wavy shape can also reduce the gluing failure caused by stress concentration.

[0015] The beneficial effects of the present utility model are as follows: After the aluminum foil sheets of the present application are spirally wound, the aluminum foil sheets can cover two trough parts and two peak parts. The aluminum foil sheets are stacked and bonded to each other. During the spiral winding process, the elastic steel wire is spirally wound together with them. The elastic steel wire is located between the stacked aluminum foil sheets. The width of the aluminum foil sheets of the present application is changed so that there are at least two layers of stacked aluminum foil sheets, and the edges of the aluminum foil sheets are stacked in three layers. In this way, the overall air outlet pipe has high strength, there is no single-layer weak part as a whole, and the overall anti-rupture ability of the air outlet pipe is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic external view of the present utility model;

[0017] Figure 2 is a schematic stacking view of the present utility model;

[0018] Figure 3 is a schematic structural view of an aluminum foil sheet of the present utility model;

[0019] Figure 4 is the present utility model Figure 3 schematic stacking structure view of the shown aluminum foil sheet;

[0020] Figure 5 is a schematic structural view of the edge of an aluminum foil sheet of the present utility model;

[0021] In the figure: 1, air outlet pipe; 2, peak part; 3, trough part; 4, edge; 5, folding wheel; 6, elastic steel wire; 7, aluminum foil sheet; 8, overlapping area; 9, pressing wheel; 10, indentation; 11, cushion wheel; 12, groove; 13, aluminum foil layer; 14, strengthening layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present utility model will be further described below through specific embodiments in conjunction with the accompanying drawings. Embodiment

[0023] As Figure 1 Figure 2 Figure 3 Figure 4 shown, a puncture-resistant aluminum foil telescopic air outlet pipe 1 of a range hood is of a corrugated pipe structure as a whole, and the pipe wall is formed by spiral winding of aluminum foil sheets 7. A spiral elastic steel wire 6 is clamped inside the spiral winding and stacking part of the aluminum foil sheets. The elastic steel wire part is the peak part 2 of the corrugated pipe, and the trough part 3 is between the peak parts. During the spiral winding process of the aluminum foil sheets, there is at least a two-layer stacking structure, and the edges 4 of the aluminum foil sheets are stacked in three layers. The axial length of the overlapping area 8 between the outermost aluminum foil sheet and the innermost aluminum foil sheet is at least 5 mm.

[0024] The pitch of the spiral winding of the aluminum foil sheet is equal to that of the spiral winding of the elastic steel wire. Therefore, the pitch of the spiral shape at the wave crest part of the air outlet pipe is the pitch of the elastic steel wire. The width of the aluminum foil sheet is greater than the sum of the lengths of two pitches. The aluminum foil sheet covers two wave trough parts and two wave crest parts, and the difference between the width of the aluminum foil sheet and the sum of the lengths of two pitches is the width of the overlapping area.

[0025] The aluminum foil sheet starts to cover from the edge and covers the wave trough part, wave crest part, wave trough part, and wave crest part in sequence from left to right as shown in Figure 2 . The right edge close to the wave crest part is the outer layer in the three-layer stack, and the left edge close to the wave trough part is the inner layer in the three-layer stack. When the aluminum foil sheet is spirally wound, as shown in Figure 2 , it extends gradually from right to left, and the right edge of the latter coil of the aluminum foil sheet covers the left edge of the former coil of the aluminum foil sheet.

[0026] Indentations 10 are provided on the aluminum foil sheet and are matched with the elastic steel wire. The convex surface of the indentation is on the side of the aluminum foil sheet facing the inside of the air outlet pipe. When the aluminum foil sheet is fed and before spiral winding, the indentations are pressed on the aluminum foil sheet through the cooperation of the pressing wheel 9 and the cushion wheel 11. The pressing wheel is above the aluminum foil sheet, and the cushion wheel is below the aluminum foil sheet. The wheel surface of the pressing wheel is in the shape required for the indentation, and a groove 12 adapted to the shape of the back of the indentation of the aluminum foil sheet is provided on the outer periphery of the cushion wheel. The position of the indentation is at the position of the aluminum foil sheet corresponding to the wave crest part on the left side.

[0027] The elastic steel wire is at the part where two layers of aluminum foil sheets are stacked. The aluminum foil sheets of the same layer are connected to two coils of elastic steel wire, and the two coils of elastic steel wire are respectively on the outer side and the inner side of the aluminum foil sheet of this layer. When the aluminum foil sheet is fed, the elastic steel wire is above the aluminum foil sheet and corresponds to the indentation, and feeds synchronously with the aluminum foil sheet. After the aluminum foil sheet and the elastic steel wire are spirally wound and bonded, the aluminum foil sheet is extruded towards the axis by the folding wheel 5 outside the pipe wall. The position of the folding wheel corresponds to the wave trough part of the air outlet pipe. When extruding, the axial length of the air outlet pipe is shortened.

[0028] The aluminum foil sheet is three-layer composite. The middle layer is the reinforcement layer 14, and the upper layer and the lower layer are both aluminum foil layers 13. The thickness of the aluminum foil layers of the upper layer and the lower layer is at least 0.6 mm, and the middle layer is a polyester fiber layer.

[0029] The edge 4 of the aluminum foil sheet is a straight line, or as shown in Figure 5 , the edge of the aluminum foil sheet adopts a serrated shape or a wavy shape.

[0030] The above is only a preferred embodiment of the present invention and does not impose any limitation on the present invention. Any simple modification, change, and equivalent transformation made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A puncture-resistant aluminum foil telescopic exhaust duct for a range hood, characterized in that, The whole is a corrugated pipe structure, and the pipe wall is formed by spiral winding of aluminum foil sheets (7). A spiral elastic steel wire is clamped inside the spiral winding and laminated part of the aluminum foil sheets. The part of the elastic steel wire is the peak part (2) of the corrugated pipe, and the part between the peak parts is the valley part (3). During the spiral winding process of the aluminum foil sheets, it is at least a two-layer laminated structure, and the edge of the aluminum foil sheets is laminated in three layers. The axial length of the overlapping area (8) between the outermost aluminum foil sheet and the innermost aluminum foil sheet is at least 5 mm.

2. The puncture-resistant aluminum foil telescopic air outlet duct for a range hood according to claim 1, characterized in that, The width of the aluminum foil sheet is greater than the sum of the lengths of two pitches, and the aluminum foil sheet covers two valley parts and two peak parts.

3. The telescopic air outlet duct of the smoke machine made of puncture-resistant aluminum foil according to claim 2, characterized in that, The aluminum foil sheet covers the valley part, the peak part, the valley part and the peak part in sequence from the edge. The edge close to the peak part is the outer layer in the three-layer lamination, and the edge close to the valley part is the inner layer in the three-layer lamination.

4. A puncture-resistant aluminum foil telescopic exhaust duct for a range hood according to claim 1, characterized in that, The elastic steel wire is in the part where two aluminum foil sheets are laminated. The aluminum foil sheets of the same layer are connected to two coils of elastic steel wires, and the two coils of elastic steel wires are respectively on the outer side and the inner side of the aluminum foil sheets of this layer.

5. A puncture-resistant aluminum foil telescopic exhaust duct for a range hood according to claim 1 or 2 or 3 or 4, characterized in that, Indentations (10) matching with the elastic steel wire are arranged on the aluminum foil sheet, and the convex surface of the indentation is on the side of the aluminum foil sheet facing the inside of the air outlet pipe.

6. A puncture-resistant aluminum foil telescopic exhaust duct for a range hood according to claim 1 or 2 or 3 or 4, characterized in that, The aluminum foil sheet is a three-layer composite, the middle layer is a reinforcing layer (14), and the upper layer and the lower layer are both aluminum foil layers (13).

7. The puncture-resistant aluminum foil telescopic air outlet duct for a range hood according to claim 6, characterized in that, The thickness of the aluminum foil layers of the upper layer and the lower layer is at least 0.58 mm; the middle layer is a polyester fiber layer.

8. A puncture-resistant aluminum foil telescopic exhaust duct for a range hood according to claim 1 or 2 or 3 or 4, characterized in that, The edge of the aluminum foil sheet is serrated or wavy.

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