A noise reduction pipe structure for an oil-free compressor

Abstract

The application relates to a noise reduction pipeline structure for an oil-free compressor, which comprises an oil-free compressor with two air outlets and two L-shaped pipelines, and the two L-shaped pipelines jointly form a T-shaped pipeline; each of the two L-shaped pipelines comprises a first pipeline section and a second pipeline section, the first pipeline section is perpendicular to the second pipeline section and is in communication with the second pipeline section, the first pipeline sections of the two L-shaped pipelines are in one-to-one correspondence with the two air outlets of the oil-free compressor and are in communication with the two air outlets, respectively, the axes of the first pipeline sections of the two L-shaped pipelines are collinear, the second pipeline sections of the two L-shaped pipelines are in communication with each other at the ends away from the first pipeline sections and form a vertical output end of the T-shaped pipeline, and the vertical output end of the T-shaped pipeline is in communication with a subsequent conveying pipeline of the oil-free compressor. The turning structure of the L-shaped pipeline can effectively buffer the pulse energy of airflow, reduce the airflow pulse phenomenon, and fundamentally reduce the noise generated by airflow collision and pulse. According to actual tests, the noise can be reduced by 2-8 decibels.

Description

Technical Field

[0001] This application relates to the field of noise reduction technology for oil-free compressors, and in particular to a noise reduction pipeline structure for oil-free compressors. Background Technology

[0002] Oil-free compressors have been widely used in medical, food processing, and electronics manufacturing fields due to their advantage of producing oil-free gas. During the operation of an oil-free compressor, the gas discharged from the compressor unit needs to be transported to the gas storage tank or gas-using terminal through the outlet and subsequent pipelines.

[0003] Currently, most commercially available oil-free compressors typically have two outlets connected by a T-tube, allowing gas to exit directly into subsequent pipelines. However, this traditional outlet pipeline structure has significant drawbacks: the airflow from both outlets generates strong airflow pulses upon entering the pipeline, and the two airflows collide directly. This airflow pulse and collision not only cause pipeline vibration but also generate considerable operating noise. As people's requirements for noise levels in their work and living environments continue to increase, the noise problem of traditional oil-free compressors has become a major factor restricting their further widespread application.

[0004] In existing technologies, methods such as wrapping sound-absorbing cotton around the pipes and adding vibration-damping supports are commonly used to reduce the noise of oil-free compressors. However, these methods increase the overall size and manufacturing cost of the compressor, and can only passively block the noise that has already been generated. They cannot fundamentally solve the problem of noise generated by airflow pulses and airflow collisions, and the noise reduction effect is very limited, making it difficult to meet the current market demand for low-noise oil-free compressors. Summary of the Invention

[0005] In order to fundamentally solve the problem of noise generated by airflow pulses and airflow collisions, this application provides a noise reduction pipeline structure for oil-free compressors.

[0006] This application provides a noise reduction pipeline structure for an oil-free compressor, employing the following technical solution: A noise-reducing piping structure for an oil-free compressor includes an oil-free compressor with two outlets and two L-shaped pipes, the two L-shaped pipes together forming a T-shaped pipe. Both L-shaped pipes include a first pipe section and a second pipe section. The first pipe section is perpendicular to and connected to the second pipe section. The first pipe section of each L-shaped pipe is connected to the two outlets of the oil-free compressor in a one-to-one correspondence. The axes of the first pipe sections of the two L-shaped pipes are collinear. The ends of the second pipe sections of the two L-shaped pipes away from the first pipe section are connected to each other and form the vertical output end of the T-shaped pipe. The vertical output end of the T-shaped pipe is connected to the subsequent delivery pipeline of the oil-free compressor.

[0007] By adopting the above technical solution, a T-shaped pipeline consisting of two L-shaped pipes is set at the two outlets of the oil-free compressor, changing the original airflow delivery path. The airflows discharged from the two outlets enter through the first section of the corresponding L-shaped pipe, then turn to the second section, and finally exit together from the vertical output end. This structure prevents the two airflows from colliding directly. At the same time, the turning structure of the L-shaped pipe can effectively buffer the pulse energy of the airflow and reduce the airflow pulse phenomenon, fundamentally reducing the noise caused by airflow collision and pulse. Actual tests show that the noise can be reduced by 2-8 decibels.

[0008] Preferably, a connecting joint for connecting to the outlet of an oil-free compressor is fixedly connected to the surface of the first section of the L-shaped pipeline, and the interior of the connecting joint is in communication with the first section of the L-shaped pipeline.

[0009] By adopting the above technical solution, the connection joint is directly fixed to the surface of the first pipe section. The connection area between the joint and the compressor outlet is much larger than the contact area of ​​"direct connection of the pipeline to the outlet". When the gas pressure acts on the interface, the larger contact area can distribute the pressure to the entire connection joint rather than concentrate it at the pipeline port, thus avoiding deformation of the pipeline due to excessive local stress and reducing "stress fatigue" at the interface.

[0010] Preferably, the connecting joint is detachably fixed to the oil-free compressor by means of bolts.

[0011] By adopting the above technical solution, and by making the connection joint and the oil-free compressor detachably fixed by bolts, the connection joint and the T-shaped pipeline can be disassembled and repaired, avoiding the impact of connection joint damage on the structural operation.

[0012] Preferably, the connection between the first and second sections of the L-shaped pipeline is an arc-shaped transition connection.

[0013] By adopting the above technical solution, the inner wall with the arc transition has a smooth curve, and the airflow can naturally turn along the curve at the bend without "changing direction after hitting the pipe wall". Compared with right angle connection, the arc structure can keep the airflow in a continuous and stable flow state, reducing the energy consumption of the airflow by eddies.

[0014] Preferably, the air outlet at the vertical output end of the T-shaped pipe can be configured as an I-shape, a cross shape, or composed of many round holes.

[0015] By adopting the above technical solutions, the I-shaped, cross-shaped, or multi-hole internal structure of the vertical output end of the T-shaped pipe is a functionally customized design for different scenarios. That is, the airflow rectification makes up for the shortcomings of the previous noise reduction system, and the application range of the pipe structure is expanded by scene adaptation.

[0016] Preferably, the internal dimensions of the T-shaped pipe are the same as the outlet dimensions of the oil-free compressor, and the material of the T-shaped pipe is the same as the material of the outlet of the oil-free compressor.

[0017] By adopting the above technical solution, and using a design where the T-shaped pipeline is made of the same material and has the same size as the oil-free compressor outlet, the pipeline structure is optimized from four key dimensions: "system compatibility, operational stability, cost control, and compliance". This not only solves the pain point of adapting different pipeline components, but also reduces costs throughout the entire life cycle, while ensuring compliance requirements for specific scenarios. This upgrades the entire oil-free compressor pipeline system from a fragmented system to an integrated and reliable system.

[0018] Preferably, the length of the T-shaped pipe is equal to the distance between the two air outlets on the oil-free compressor.

[0019] By adopting the above technical solution and using T-shaped pipes with customized spacing, the precise length is preset at the factory. Assembly workers only need to connect the two first pipe sections to the air outlet and tighten the connecting bolts to complete the installation. No on-site adjustments are required, which greatly improves the assembly efficiency of the production line.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. This invention alters the original airflow delivery path by incorporating a T-shaped pipeline composed of two L-shaped pipes at the two outlets of an oil-free compressor. The airflow from each outlet enters through the first section of the corresponding L-shaped pipeline, then deflects to the second section, and finally exits together from the vertical output end. This structure prevents the two airflows from directly colliding, and the deflection structure of the L-shaped pipeline effectively buffers the pulse energy of the airflow, reducing airflow pulsation and fundamentally reducing noise caused by airflow collision and pulsation. Actual testing shows that noise can be reduced by 2-8 decibels. 2. The inner and outer diameters of the T-shaped pipe in this utility model are consistent with the original pipe, and the overall structure is compact. It can adapt to the spacing between the two air outlets of the original oil-free compressor. There is no need to adjust the body structure of the oil-free compressor or the installation space of the original pipe, ensuring that the overall volume of the oil-free compressor remains unchanged. This avoids the problem of increased equipment size due to the noise reduction structure, and facilitates the modification and upgrading of existing oil-free compressor products. 3. The noise reduction pipeline structure of this utility model is simple, has low manufacturing cost, and does not require complicated processes for installation. It can be connected to the original air outlet and subsequent pipeline through conventional connection methods, which facilitates large-scale production and promotion. 4. Since the inner diameter of the T-shaped pipeline is the same as that of the original pipeline, and the connection adopts a rounded transition structure to reduce airflow resistance, the airflow is smoothly transported in the pipeline. The gas output efficiency of the oil-free compressor will not be reduced due to the noise reduction structure, thus ensuring the normal operation performance of the equipment. Attached Figure Description

[0021] Figure 1 It is a front-view perspective view of the noise reduction piping structure used in oil-free compressors and its compatibility with oil-free compressors; Figure 2 This is a front-view perspective view of the noise reduction piping structure used in oil-free compressors; Figure 3 This is a bottom sectional view of the noise reduction piping structure used in oil-free compressors; Figure 4 This is a three-dimensional diagram of the vertical output end structure of other shapes used in noise reduction piping structures for oil-free compressors.

[0022] Attached reference numerals: 1. Oil-free compressor; 2. L-shaped pipeline; 2-1. First pipeline section; 2-2. Second pipeline section; 3. T-shaped pipeline; 3-1. Vertical output end; 4. Connecting joint. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 -Appendix Figure 4 This application will be described in further detail.

[0024] This application discloses a noise reduction pipeline structure for an oil-free compressor.

[0025] Reference Figure 1A noise-reducing piping structure for an oil-free compressor includes an oil-free compressor 1 with two outlets and two L-shaped pipes 2. The two L-shaped pipes 2 are connected side-to-side to form a T-shaped pipe 3. Each L-shaped pipe 2 includes a first pipe section 2-1 and a second pipe section 2-2. The first pipe section 2-1 and the second pipe section 2-2 are perpendicular to each other and connected to each other, allowing air to pass through the L-shaped pipe 2. The first pipe sections 2-1 of the two L-shaped pipes 2 are respectively connected and fixed to the two outlets of the oil-free compressor 1, so that the L-shaped pipes 2 together form a T-shaped pipe 3 fixed on the oil-free compressor 1 to buffer the gas discharged from the outlet of the oil-free compressor 1. The axes of the first pipe sections 2-1 on the two L-shaped pipes 2 are on a straight line, so that the T-shaped pipe 3 formed by the L-shaped pipes 2 remains horizontal and avoids interference. To buffer and reduce noise in the gas, the second sections 2-2 of the two L-shaped pipes 2 are connected at their ends away from the first section 2-1, forming the vertical output end 3-1 of the T-shaped pipe 3. This vertical output end 3-1 is used to connect with the subsequent delivery pipeline of the oil-free compressor 1. The second sections 2-2 of the two L-shaped pipes 2 eventually converge into the "T-shaped vertical output end 3-1", and the second section 2-2 is perpendicular to the first section 2-1. When the airflow turns from the first section 2-1 to the second section 2-2, the path is smooth without sharp bends, and it is not easy to form a "vortex zone" when converging. At the same time, the T-shaped pipe 3 is connected to the subsequent delivery pipeline through a vertical output end 3-1. Compared with two independent pipes being connected separately, one pipe interface is reduced, avoiding airflow leakage and local resistance at the interface, and indirectly improving the gas delivery efficiency of the compressor.

[0026] With the above scheme, the first section 2-1 of the two L-shaped pipes 2 are "collinear" and connected to the two outlets of the compressor respectively. This means that the pulsating airflow discharged from the two outlets will flow in opposite directions in the first section 2-1. After entering the second section 2-2, it forms "airflow collision". During this process, some of the pulsating energy with opposite phases will cancel each other out, directly weakening the intensity of the airflow pulsation. This reduces vibration and noise transmission from the source of noise. The L-shaped + T-shaped design of the pipes themselves achieves noise reduction. There is no need to add special noise reduction components such as sound-absorbing cotton and resonance cavity, which reduces the number of parts and manufacturing costs and is suitable for mass production.

[0027] The material of T-shaped pipe 3 is the same as that of the original pipe of oil-free compressor 1, and the inner and outer diameters of T-shaped pipe 3 are consistent with the inner and outer diameters of the outlet pipe of oil-free compressor 1, so as to ensure that the size and volume of the outlet pipe of oil-free compressor 1 are not changed; so that the size and connection method of the seal of the outlet pipe of oil-free compressor 1 are matched with the pipe size. When the size of T-shaped pipe 3 is consistent, the original seal and connection tool can be directly reused; when the material is the same, the compatibility between the seal and the pipe wall is also completely consistent, avoiding accelerated aging of the seal due to material differences.

[0028] The material of the L-shaped pipe 2 can be selected according to the material of the outlet pipe of the oilless compressor 1. In addition to the 304 stainless steel and aluminum alloy in the above embodiment, materials such as copper, engineering plastics, and rubber that meet the gas transportation requirements of the oilless compressor 1 can also be used, as long as the corrosion resistance and pressure resistance of the material meet the working requirements of the equipment. refer to Figure 1 and Figure 2 The length of the T-shaped pipe 3 is equal to the distance between the two air outlets on the oil-free compressor 1, so that the length of the T-shaped pipe 3 is determined according to the distance between the two air outlets of the oil-free compressor 1. This ensures that the pipes can fit tightly after installation without taking up additional installation space for the oil-free compressor 1. The lengths of the first section 2-1 and the second section 2-2 of the L-shaped pipe 2 can be flexibly adjusted according to the specific model of the oil-free compressor 1, the distance between the air outlets, and the installation space. The core is to ensure that the two L-shaped pipes 2 can form a stable T-shaped pipe 3 without changing the volume of the original equipment. If the length of the T-shaped pipe 3 is shorter than the distance between the air outlets, forced installation will cause the pipe to be "overstretched", causing deformation of the pipe body and even damaging the connection with the connecting joint 4. If the length is too long, the pipe will "sag" and may rub against other parts of the compressor. Customizing the length according to the distance ensures that the pipe is in a "natural stress-free state" after installation, avoiding structural damage caused by stretching or compression and ensuring the integrity of the pipe for long-term use.

[0029] refer to Figure 2 A connecting joint 4 is fixedly connected to the surface of the first section 2-1 of the L-shaped pipeline 2. The connecting joint 4 is used to connect to the outlet of the oil-free compressor 1, and the interior of the connecting joint 4 is connected to the interior of the first section 2-1 of the L-shaped pipeline 2. The connection between the connecting joint 4 and the oil-free compressor 1 is fixed by bolts, which allows the connecting joint 4 to be disassembled and replaced. At the same time, it makes the connection between the first section 2-1 of the L-shaped pipeline 2 and the oil-free compressor 1 more secure. When gas pressure is applied to the interface, the larger contact area can distribute the pressure to the entire connecting joint 4, rather than concentrating it at the pipeline port, thus avoiding deformation of the pipeline due to excessive local stress and reducing "stress fatigue" at the interface.

[0030] refer to Figure 3 To reduce airflow resistance within the L-shaped pipe 2, a circular arc transition structure can be used at the connection between the first pipe section 2-1 and the second pipe section 2-2. The inner wall of the arc transition is a smooth curve, allowing the airflow to naturally turn along the curve at the bend without having to "bump into the pipe wall and change direction". Compared to a right-angle connection, the arc structure allows the airflow to maintain a continuous and stable flow state, reducing the energy consumption of the airflow by eddies.

[0031] refer to Figure 4The existing pipeline outlet is "I" shaped, but the pipeline can also be "+" shaped or other shapes. The T-shaped pipeline 3 can also be composed of many round holes. At the same time, the shape of the second section 2-2 of the two L-shaped pipelines 2 is not limited to a specific shape, as long as it can achieve connection and mutual isolation to prevent airflow collision. The above scheme essentially involves setting up a "straight guide rib" or "cylindrical guide tube" inside the air outlet, which can guide the airflow that may "deviate to one side" after merging to flow along the axis of the output end, thus avoiding "wall-bound deflection" of the airflow in the subsequent pipeline. The cross-shaped structure uses two perpendicularly intersecting guide ribs to divide the airflow at the outlet into four uniform sub-airflow channels. If there is a "rotating vortex" in the airflow where the two L-shaped pipes converge, the cross-shaped guide ribs can directly break the vortex, allowing the four sub-airflows to be output smoothly along their respective channels. Furthermore, the four airflows will naturally merge into a "uniform columnar airflow" in the subsequent pipes, avoiding airflow energy loss caused by vortices. The multi-hole structure is a baffle or guide plate with dense small holes inside the air outlet. The merged airflow needs to pass through multiple small holes before it can be output. During this process, the large airflow is divided into dozens of "microflows". The airflow velocity and pressure in each small hole will naturally tend to be consistent. The final output airflow is a "uniformly diffused and stable airflow" with almost no local velocity differences.

[0032] The noise reduction pipeline structure of this utility model is not only applicable to newly produced oil-free compressors 1, but can also be used to modify oil-free compressors 1 that are already in use. It is only necessary to remove the original connection between the air outlet and the subsequent pipeline and replace it with the T-type pipeline structure of this invention. The modification cost is low and the applicability is strong.

[0033] The implementation principle of this application embodiment is as follows: In implementation, the airflow discharged from the two outlets of the oilless compressor 1 enters through the first section 2-1 of the corresponding L-shaped pipe 2, then turns to the second section 2-2, and finally exits from the vertical output end 3-1 together. At the same time, the pulsating airflow discharged from the two outlets will flow in opposite directions in the first section 2-1, and after entering the second section 2-2, it forms "airflow collision". During this process, some of the pulsating energy with opposite phases will cancel each other out, directly weakening the intensity of airflow pulsation, reducing vibration and noise transmission from the noise source, thereby fundamentally reducing the noise generated by airflow collision and pulse. According to actual tests, the noise can be reduced by 2-8 decibels.

[0034] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A noise-reducing piping structure for an oil-free compressor, comprising an oil-free compressor (1) with two outlets and two L-shaped pipes (2), characterized in that, The two L-shaped pipes (2) together form a T-shaped pipe (3); Both L-shaped pipes (2) include a first pipe section (2-1) and a second pipe section (2-2). The first pipe section (2-1) and the second pipe section (2-2) are perpendicular and connected. The first pipe section (2-1) of the two L-shaped pipes (2) are respectively connected to the two outlets of the oil-free compressor (1). The axes of the first pipe sections (2-1) of the two L-shaped pipes (2) are collinear. The ends of the second pipe sections (2-2) of the two L-shaped pipes (2) away from the first pipe section (2-1) are connected to each other and form the vertical output end (3-1) of the T-shaped pipe (3). The vertical output end (3-1) of the T-shaped pipe (3) is connected to the subsequent conveying pipeline of the oil-free compressor (1).

2. The noise-reducing pipeline structure for an oil-free compressor according to claim 1, characterized in that, A connecting joint (4) for connecting to the outlet of an oil-free compressor (1) is fixedly connected to the surface of the first pipe section (2-1) of the L-shaped pipeline (2), and the interior of the connecting joint (4) is connected to the first pipe section (2-1) of the L-shaped pipeline (2).

3. The noise-reducing pipeline structure for an oil-free compressor according to claim 2, characterized in that, The connecting joint (4) is detachably fixed to the oil-free compressor (1) by means of bolts.

4. The noise-reducing pipeline structure for an oil-free compressor according to claim 1, characterized in that, The connection between the first pipe section (2-1) and the second pipe section (2-2) of the L-shaped pipeline (2) adopts an arc-shaped transition connection.

5. The noise-reducing pipeline structure for an oil-free compressor according to claim 1, characterized in that, The air outlet of the vertical output end (3-1) of the T-shaped pipe (3) can be configured as an I-shaped, a cross-shaped, or composed of many round holes.

6. The noise-reducing pipeline structure for an oil-free compressor according to claim 1, characterized in that, The internal dimensions of the T-shaped pipe (3) are the same as the outlet dimensions of the oil-free compressor (1), and the material of the T-shaped pipe (3) is the same as the material of the outlet of the oil-free compressor (1).

7. The noise-reducing pipeline structure for an oil-free compressor according to claim 1, characterized in that, The length of the T-shaped pipe (3) is equal to the distance between the two air outlets on the oil-free compressor (1).

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