Noiseless bellows
By setting ribs and rough surfaces inside the corrugated tube of the inflatable product, the airflow vortex is disrupted, solving the inflation noise problem and achieving low-noise, high-efficiency inflation, which is suitable for a variety of inflatable products.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 赵泽畅
- Filing Date
- 2025-09-24
- Publication Date
- 2026-07-21
AI Technical Summary
Existing inflatable products have significant noise problems during inflation, and traditional methods cannot effectively reduce noise while maintaining inflation efficiency.
Ribs are set inside the bellows, and the inner surface of the crest is designed as a rough plane. The rough plane is formed by irregular patterns or protrusions, which disrupts the airflow vortex and suppresses noise generation.
It significantly reduces inflation noise, maintains inflation efficiency, improves user experience, has low production costs, and is suitable for a variety of inflatable products.
Smart Images
Figure CN224533831U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of inflatable technology, and in particular to a noiseless corrugated pipe for inflatable products. Background Technology
[0002] Inflatable products, such as inflatable mattresses, inflatable swimming pools, inflatable toys, and inflatable sofas, are widely used in daily life. These products are typically inflated using electric or manual air pumps. During inflation, the airflow passing through the corrugated tube generates significant noise, especially under high-pressure or high-speed airflow conditions, where this noise problem is particularly pronounced.
[0003] Traditional inflatable products typically use corrugated tubes with smooth inner surfaces. When airflow passes through the crests and troughs, it easily creates turbulence and eddies, producing a noticeable hissing or whistling sound. This noise not only affects the user experience but can also cause disturbance in situations requiring a quiet environment (such as using inflatable mattresses at night or indoor inflatable toys).
[0004] To address the inflation noise problem in existing technologies, the following methods are typically employed: 1. Reduce the power of the air pump or the airflow speed, but this will significantly prolong the inflation time; 2. Adding a soundproof cover to the outside of the air pump increases cost and size; 3. Use a more complex muffler structure, but this increases the difficulty and cost of manufacturing.
[0005] These methods all have significant limitations and cannot effectively solve the noise problem while maintaining inflation efficiency. Therefore, there is an urgent need for a noiseless corrugated pipe specifically designed for inflatable products that can significantly reduce noise while maintaining inflation efficiency. Summary of the Invention
[0006] The purpose of this invention is to provide a noiseless corrugated tube specifically for inflatable products. Through innovative design of the internal structure of the corrugated tube, the noise generated during inflation is effectively reduced while maintaining inflation efficiency.
[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A noiseless corrugated pipe includes a pipe body with several peaks and troughs spaced apart inside the pipe body; adjacent peaks and troughs are connected by transition sections; the peaks inside the pipe body are in the form of a plane, and ribs are provided on the plane, with the ribs parallel to the central axis of the pipe body.
[0008] Furthermore, the crest plane is a rough plane.
[0009] Furthermore, the rough surface is formed by setting several protrusions or pits on the crest plane.
[0010] Furthermore, the rough surface is formed by setting irregular longitudinal lines on the crest plane, with the longitudinal lines parallel to the ribs.
[0011] Furthermore, the longitudinal texture consists of protrusions on the crest plane.
[0012] Furthermore, the rib extends from one end of the tube to the other end, passing through the crests, troughs, and transition sections between them.
[0013] The beneficial effects of adopting the above-mentioned optimized technical solution are as follows: 1. Excellent noise reduction effect: The core improvement of this utility model lies in setting ribs inside the tube and setting the inner surface of the crest as a rough plane. Both of these structures can effectively destroy the regular vortices and turbulence formed by high-speed airflow inside the tube, breaking large vortices into countless small vortices, significantly reducing airflow pulsation, thereby effectively suppressing and reducing the aerodynamic noise generated during inflation from the sound source, making the inflation process quieter.
[0014] 2. Maintain inflation efficiency: Unlike methods that simply reduce pump speed, this invention reduces noise without increasing airflow resistance or affecting airflow passage, thus ensuring inflation speed and achieving a balance between "high-efficiency inflation" and "low noise".
[0015] 3. Simple structure and easy to manufacture: The noise reduction structure can be directly formed on the wave crest surface through mold processing (such as etching, sparking) or post-processing, without the need for additional parts or complex composite structures. The production cost is low and it is easy to promote.
[0016] 4. Enhanced user experience: Especially suitable for noise-sensitive inflatable product application scenarios, such as home camping and indoor rest, greatly improving user comfort and satisfaction. Attached Figure Description
[0017] Figure 1 This is a schematic cross-sectional view of the structure of this utility model.
[0018] Figure 2 for Figure 1 Enlarged at point A Figure 1 (Irregular patterns on the wave crest plane).
[0019] Figure 3 for Figure 1 Enlarged at point A Figure 2 (Several protrusions on the crest plane).
[0020] In the image: 1. trough, 2. rib, 3. crest plane, 4. irregular texture, 5. protrusion. Detailed Implementation
[0021] The present invention will now be described in further detail with reference to the accompanying drawings.
[0022] Example 1:
[0023] See Figure 1 and Figure 2 This embodiment provides a noiseless corrugated pipe, including a pipe body made of a flexible material (such as TPU, PVC, etc.). The inner wall of the pipe is provided with troughs 1 and crests at intervals along the axial direction, and the troughs 1 and crests are smoothly connected by an arc-shaped transition section.
[0024] The core improvement of this embodiment lies in the fact that ribs are provided on the crests within the tube body along the extension direction of the tube body, and the inner surface of the crests (i.e., the crest plane 3) is a rough surface. Specifically, this rough surface is achieved by machining irregular textures 4 on the crest plane 3. These irregular textures 4 are continuous or discontinuous raised structures, and their shapes can be irregular serrations, waves, or randomly distributed rough textures. The direction of the irregular textures should be basically parallel to the extension direction of the tube body. These textures can be formed in one step by directly etching (such as spark pattern or sandblasting pattern) on the manufacturing mold, without the need for subsequent processing, making the process simple and inexpensive.
[0025] When the air pump is working, high-speed airflow passes through the bellows. Traditional smooth corrugated surfaces cause regular vortices and vibrations in the airflow, resulting in noise. In this embodiment, however, the irregular raised texture on the corrugated plane 3 effectively disrupts the boundary layer of the airflow, decomposing large vortices into multiple small and irregular turbulences, significantly reducing the intensity of airflow vibration and noise, thereby achieving "noise-free" inflation.
[0026] This embodiment is particularly applicable to home furnishing products that are sensitive to inflation noise, such as air mattresses and air sofas.
[0027] Example 2:
[0028] See Figure 1 and Figure 3 This embodiment provides another way to implement a noiseless bellows. Its overall structure is the same as that of Embodiment 1, the difference being the way the rough plane on the crest plane 3 is formed.
[0029] In this embodiment, the rough surface is achieved by uniformly distributing a plurality of protrusions 5 on the crest plane 3. These protrusions 5 can be hemispherical, conical, or frustum-shaped, and are distributed in a certain array (such as a rectangular array or a rhomboid array) or in an irregular manner. The height of the protrusions 5 is preferably 0.1-0.5 mm, and the diameter is preferably 0.5-2 mm, which can effectively disturb the airflow without causing significant resistance to the airflow.
[0030] This raised dot structure can also disrupt the regular flow of air within the pipe, effectively suppressing eddy currents and reducing noise. Compared to irregular patterns, the raised dot structure can be achieved through precision hole machining in a mold, making it suitable for mass production.
[0031] The rib 2 is installed throughout the entire pipe body, increasing strength and improving the turbulence effect.
[0032] The raised dot design in this embodiment ensures noise reduction while making it easier to control processing precision and consistency, making it suitable for products that require high production consistency, such as inflatable swimming pools and inflatable toys.
[0033] Example 3:
[0034] This embodiment provides yet another way to implement a noiseless bellows. Unlike the previous embodiments, this embodiment directly defines the rough plane of the crest plane 3 from the perspective of surface roughness.
[0035] In this embodiment, the rough surface of the wave crest plane 3 has a specific surface roughness. Experiments have verified that when the surface roughness Ra value is in the range of 0.2 μm to 50 μm, a significant noise reduction effect can be achieved. Preferably, when the Ra value is in the range of 3.2 μm to 35 μm, the balance between noise reduction effect and airflow permeability is optimal.
[0036] This rough surface can be achieved through various processing methods, including but not limited to: mold texturing, surface sandblasting, machining, and chemical etching. Different processing methods can form micro-rough structures with different characteristics, but as long as the surface roughness Ra value falls within the above range, they can effectively disrupt the airflow boundary layer and suppress noise generation.
[0037] Compared with the specific structures of Embodiments 1 and 2, this embodiment uses roughness as a technical parameter, providing a more flexible choice for the production process. Manufacturers can choose the most economical and suitable processing method to achieve the required roughness according to their own equipment conditions and product requirements, and can also achieve the noise reduction purpose of this utility model.
[0038] The arrangement of the reinforcing bar 2 is the same as in Example 2.
[0039] Working principle:
[0040] All three embodiments are based on the same noise reduction principle: by setting ribs inside the tube and changing the smooth inner surface of the wave crest to a rough surface (irregular texture or protrusions), the airflow boundary layer is disrupted, large eddies are decomposed into smaller eddies, and airflow pulsation and vibration are reduced, thereby suppressing noise generation at its source. The ribs are also used to enhance structural stability and prevent deformation.
[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A noiseless corrugated pipe, comprising a pipe body, wherein the pipe body contains a plurality of corrugations and troughs spaced apart (1); adjacent corrugations and troughs are connected by transition sections; characterized in that, The wave crest inside the tube is in the form of a plane, and there are ribs on the plane, which are parallel to the central axis of the tube.
2. The noiseless corrugated pipe according to claim 1, characterized in that, The crest plane is a rough plane.
3. The noiseless corrugated pipe according to claim 2, characterized in that, The rough surface is formed by setting several protrusions (5) or pits on the crest plane (3).
4. The noiseless corrugated pipe according to claim 2, characterized in that, The rough surface is formed by setting irregular longitudinal lines (4) on the crest plane, with the longitudinal lines parallel to the ribs.
5. A noiseless corrugated pipe according to claim 4, characterized in that, The longitudinal texture (4) is a protrusion on the crest plane.
6. A noiseless corrugated pipe according to claim 1, characterized in that, The ribs extend from one end of the tube to the other end, passing through the crests, troughs, and transition sections between them.