Compressor anti-overflow breathing valve

Abstract

The utility model relates to valve technical field, is a kind of compressor anti-overflowing oil breather valve, it includes bonnet, upper valve body, lower valve body, left baffle, right baffle and baffle column, the upper side of bonnet is equipped with several exhaust holes, and the lower end outside of bonnet is fixedly installed with upper valve body, and the lower end inside of upper valve body is fixedly installed with lower valve body;Upper valve body left part inside is equipped with at least two left baffles in upper and lower interval.This utility model is reasonable and compact in structure, convenient to use, by setting left baffle and right baffle, change airflow path, effectively slow down the flow speed and pressure fluctuation of oil gas, and utilize inertia collision effect to intercept the fine oil mist particles that escape with airflow;By setting filter device, after oil drop is adsorbed, it can be coalesced into large droplet, and large droplet is backflowed to the liquid-collecting device arranged below under the action of gravity, so that oil drop is directly backflowed to crankcase, with stable, reliable and good anti-overflowing oil effect characteristics.

Description

Technical Field

[0001] This utility model relates to the field of valve technology and is a compressor anti-oil overflow breather valve. Background Technology

[0002] As an indispensable key piece of equipment in modern industrial production, the compressor's operating status directly affects production efficiency and product quality. The breather valve (or breather unit), as one of the core components of the compressor system, plays a crucial role in balancing internal and external pressures and expelling oil-containing gases. However, during compressor operation, oil-containing gases generated by temperature changes and pressure fluctuations need to be discharged through the breather valve. Traditional breather valves commonly suffer from lubricating oil overflow during the exhaust process. This not only leads to reduced equipment operating efficiency, shortened service life, and increased maintenance costs, but also causes serious environmental pollution due to long-term oil spillage, becoming a bottleneck restricting the compressor's reliability and environmental performance.

[0003] Traditional compressor breather valves mostly employ a straight-through design, lacking effective internal blocking or buffering mechanisms. When the compressor is running, significant pressure fluctuations cause the oil-gas mixture to be discharged directly without sufficient separation, significantly increasing the risk of oil spillage. Although various improvement solutions have been proposed in existing technologies, the following limitations still exist: (1) Multi-layer filter structure (such as Chinese patent document CN208106703U): This solution uses an annular cover and multiple arc-shaped filters (concave side facing the outlet) at the top of the ventilation pipe to intercept oil mist and guide it back to the oil sump. Although oil-gas separation can be achieved, the multi-layer filter needs to be fixed with a support pipe and screw, which makes the structure complex and the filter easy to clog, resulting in high maintenance costs; at the same time, the arc-shaped filter has limited interception efficiency for high-velocity oil and gas, and there is still a problem of trace oil mist escaping.

[0004] (2) Composite structure of glass ball and labyrinth channel (e.g., Chinese patent document with publication number CN111878608A): This scheme uses a glass ball as the first filtration layer. Gas pushes the glass ball to open the air passage, allowing oil mist to adhere to the surface of the ball. At the same time, the misaligned notch protrusion on the insert rod and the inner wall of the insertion part form a labyrinth spiral channel, which serves as the second filtration layer. Although this design improves filtration efficiency, the movable connection structure of the glass ball is prone to sealing failure due to vibration, and the labyrinth channel requires high processing precision, significantly increasing manufacturing costs.

[0005] (3) Dynamic baffle and reflux system (e.g., Chinese patent document CN213743894U): This scheme uses an inclined oil injection hole inside the crankshaft to guide the oil mist downwards, and dynamically adjusts the exhaust channel through a movable baffle (controlled by a return spring) inside the breather hood, in conjunction with the reflux hole to recover the oil mist. Although the design of the connecting plate rotating with the airflow to scrape off the oil stains on the inner wall can reduce the oil mist spraying, the moving parts (such as the movable shaft and baffle) are prone to wear under high pressure, resulting in insufficient long-term operational reliability; moreover, the fitting precision requirements between the inclined oil injection hole and the breather hood are stringent, making assembly difficult.

[0006] In summary, while existing technologies have alleviated oil spill problems to some extent, they generally suffer from drawbacks such as complex structures, high manufacturing costs, difficult maintenance, or insufficient long-term reliability. For example, multi-layered filters require frequent replacement; glass bulb sealing structures are prone to failure; and dynamic baffle systems have a high risk of wear. Therefore, there is an urgent need to develop a compressor breather valve that is structurally simplified, highly efficient in filtration, low in cost, and reliable in operation, thus balancing environmental friendliness and economic efficiency. Summary of the Invention

[0007] This utility model provides a compressor oil spill prevention breather valve, which overcomes the shortcomings of the prior art and can effectively solve the problem of poor oil spill prevention effect of existing breather valves.

[0008] The technical solution of this utility model is achieved through the following measures: A compressor anti-overflow breather valve includes a valve cap, an upper valve body, a lower valve body, a left baffle plate, a right baffle plate, and baffle columns. The upper side of the valve cap is provided with several exhaust holes. The upper valve body is fixedly installed on the outer side of the lower end of the valve cap, and the lower valve body is fixedly installed on the inner side of the lower end of the upper valve body. At least two left baffle plates are provided at intervals on the inner side of the left part of the upper valve body. A right baffle plate is provided on the inner side of the right part of the upper valve body corresponding to the position between each two adjacent left baffle plates. The left baffle plates are inclined in a left-high-right-low direction, and the right baffle plates are inclined in a left-low-right-high direction. Several baffle columns are provided on the upper side of both the left and right baffle plates.

[0009] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution: The aforementioned deflector columns may include left deflector columns and right deflector columns. The upper side of the left deflector plate is provided with at least two rows of left deflector column groups that are spaced apart from left to right, and each row of left deflector column groups includes at least two left deflector columns that are spaced apart from front to back. The upper side of the right deflector plate is provided with at least two rows of right deflector column groups that are spaced apart from left to right, and each row of right deflector column groups includes at least two right deflector columns that are spaced apart from front to back.

[0010] All the aforementioned left and right deflector columns can be arranged in a trapezoidal array. The number of left deflector columns in each column of left deflector columns decreases from left to right, while the number of right deflector columns in each column of right deflector columns increases from left to right.

[0011] The angle between the left baffle and the upper valve body is the first angle, and the angle between the right baffle and the upper valve body is the second angle. Both the first angle and the second angle are between 70° and 80°.

[0012] The above may also include a filtration device and a liquid collection device. An upper limit ring platform is provided on the inner side of the upper part of the upper valve body corresponding to the position between the left baffle and the valve cap, and a filtration device is provided between the valve cap and the upper limit ring platform. A lower limit ring platform is provided on the inner side of the lower part of the upper valve body corresponding to the position between the left baffle and the lower valve body, and a liquid collection device is provided between the lower limit ring platform and the lower valve body.

[0013] The aforementioned filtration device can be a filter cloth, which is made of polypropylene meltblown nonwoven fabric.

[0014] The above-mentioned liquid collection device can be a filter cone, with a filter cone provided in the lower valve body, and an installation ring platform installed between the lower limit ring platform and the lower valve body on the outer side of the upper end of the filter cone.

[0015] The above may also include an O-ring seal, a sealing ring groove on the upper outer side of the lower valve body, and an O-ring seal inside the sealing ring groove; the upper valve body is fixedly installed on the lower outer side of the valve cap by a threaded connection, the lower valve body is fixedly installed on the lower inner side of the upper valve body by a threaded connection, and the lower outer side of the lower valve body is provided with an external thread.

[0016] This utility model has a reasonable and compact structure and is easy to use. By setting up left and right baffles, the airflow path is changed, which effectively reduces the flow speed and pressure fluctuation of oil and gas. It also uses the inertial collision effect to intercept fine oil mist particles that escape with the airflow. By setting up a filter device, oil droplets can be adsorbed and agglomerated into large droplets. Under the action of gravity, the large droplets flow back to the liquid collection device set below them, so that the oil droplets flow directly back to the crankcase. It has the characteristics of stability, reliability and good oil spill prevention. Attached Figure Description

[0017] Appendix Figure 1 These are schematic diagrams of the main cross-sectional structure of embodiments 1 to 8 of this utility model.

[0018] Appendix Figure 2 This is a top view of the right deflector.

[0019] The codes in the attached diagram are as follows: 1 is valve cap, 2 is upper valve body, 3 is lower valve body, 4 is left baffle plate, 5 is right baffle plate, 6 is left baffle column, 7 is right baffle column, 8 is upper limit ring platform, 9 is lower limit ring platform, 10 is filter cloth, 11 is filter screen cone, 12 is mounting ring platform, 13 is O-ring seal, 14 is vent hole, α is the first included angle, and β is the second included angle. Detailed Implementation

[0020] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0021] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as front, back, top, bottom, left, right, etc. The positional relationships are determined based on the layout direction of the attached diagram in the instruction manual.

[0022] The present invention will be further described below with reference to the embodiments and accompanying drawings: Example 1: As shown in the attached document Figure 1 , 2 As shown, the compressor's anti-overflow breather valve includes a valve cap 1, an upper valve body 2, a lower valve body 3, a left baffle plate 4, a right baffle plate 5, and baffle columns. The upper side of the valve cap 1 is provided with several exhaust holes 14. The upper valve body 2 is fixedly installed on the outer side of the lower end of the valve cap 1, and the lower valve body 3 is fixedly installed on the inner side of the lower end of the upper valve body 2. At least two left baffle plates 4 are provided at intervals on the inner side of the left part of the upper valve body 2. A right baffle plate 5 is provided on the inner side of the right part of the upper valve body 2 corresponding to the position between each two adjacent left baffle plates 4. The left baffle plates 4 are inclined with the left side higher than the right side, and the right baffle plates 5 are inclined with the left side lower than the right side. Several baffle columns are provided on the upper side of both the left baffle plates 4 and the right baffle plates 5. During operation, by setting the left baffle 4 and the right baffle 5, the airflow path is changed, effectively slowing down the flow speed of oil and gas, greatly reducing pressure fluctuations, and using the inertial collision effect to intercept the fine oil mist particles escaping with the airflow, forcing the oil droplets to collide with the plate surface and coalesce into larger droplets. By setting the baffle column, the oil-liquid separation efficiency and system operation stability can be significantly enhanced. The baffle column actively disrupts the continuous liquid film formed by the oil carried by the airflow on the left baffle 4 and the right baffle 5 through physical means, forcing the dispersed small oil droplets to collide and coalesce at the raised edges to form larger diameter droplets. At the same time, the local turbulence disturbance generated by the baffle column increases the contact probability between the oil droplets and the left baffle 4 and the right baffle 5, accelerating the droplet merging process.

[0023] The above-mentioned compressor oil overflow prevention breather valve can be further optimized and / or improved according to actual needs: Example 2: As shown in the attached document Figure 1 , 2As shown, the baffle columns include left baffle columns 6 and right baffle columns 7. At least two rows of left baffle columns 6 are spaced apart on the upper side of the left baffle plate 4, each row including at least two left baffle columns 6 spaced apart front to back. At least two rows of right baffle columns 7 are spaced apart on the upper side of the right baffle plate 5, each row including at least two right baffle columns 7 spaced apart front to back. During operation, the numerous left baffle columns 6 and right baffle columns 7 increase the effective surface area of ​​the left baffle plate 4 and right baffle plate 5, providing more attachment sites for oil droplets and further reducing the concentration of residual oil mist in the exhaust gas.

[0024] Example 3: As shown in the attached document Figure 1 , 2 As shown, all left deflector columns 6 and right deflector columns 7 are arranged in a trapezoidal array. The number of left deflector columns 6 in each column of left deflector columns 6 decreases from left to right, while the number of right deflector columns 7 in each column of right deflector columns 7 increases from left to right. During use, the trapezoidal array of left deflector columns 6 and right deflector columns 7 increases the effective surface area of ​​left deflector plates 4 and right deflector plates 5, providing more attachment sites for oil droplets and further reducing the concentration of residual oil mist in the exhaust gas.

[0025] Example 4: As shown in the appendix Figure 1 As shown, the angle between the left baffle 4 and the upper valve body 2 is the first included angle α, and the angle between the right baffle 5 and the upper valve body 2 is the second included angle β. Both the first included angle α and the second included angle β are between 70° and 80°. During use, the inclined left baffle 4 and right baffle 5 can also guide the coalesced droplets to slide directionally along the plate surface and flow back to the crankcase. Depending on the requirements, both the first included angle α and the second included angle β can be 75°.

[0026] Example 5: As shown in the attached document Figure 1 As shown, it also includes a filtration device and a liquid collection device. An upper limit ring platform 8 is provided on the inner side of the upper valve body 2, corresponding to the position between the left baffle 4 and the valve cap 1. A filtration device is located between the valve cap 1 and the upper limit ring platform 8. A lower limit ring platform 9 is provided on the inner side of the lower part of the upper valve body 2, corresponding to the position between the left baffle 4 and the lower valve body 3. A liquid collection device is located between the lower limit ring platform 9 and the lower valve body 3. During use, by setting up the filtration device, oil droplets can be adsorbed and coalesced into larger droplets. Under the action of gravity, the larger droplets flow back to the liquid collection device below them, thus allowing the oil droplets to flow directly back to the crankcase, improving recovery efficiency.

[0027] Example 6: As shown in the appendix Figure 1As shown, the filtration device is filter cloth 10, which is made of polypropylene meltblown nonwoven fabric. During use, the polypropylene (PP) meltblown nonwoven fabric undergoes oleophilic modification treatment, causing oil droplets to be adsorbed and coalesce into larger droplets, which then flow back under gravity. Based on requirements, filter cloth 10 is made of polypropylene meltblown nonwoven fabric, its core function being to efficiently intercept oil mist particles in oily gases while maintaining low airflow resistance to avoid system pressure buildup. This material forms a three-dimensional gradient density structure through ultrafine fibers (typically 1-5 micrometers in diameter), possessing both physical interception and electrostatic adsorption mechanisms: the micrometer-level pores formed by the random stacking of fibers can block liquid oil droplets from passing through, while the electrostatic charge carried by the polypropylene material after electret treatment can actively adsorb submicron-level oil mist particles, achieving an interception efficiency of over 99.5%. Compared to traditional filter media, its advantages are particularly prominent: high air permeability ensures rapid gas discharge, and the pressure difference loss of the breather valve can be controlled within 0.5 kPa, effectively preventing compressor cavity pressure buildup caused by poor exhaust; strong oleophobicity makes it difficult for intercepted oil to wet the fibers, and it can slide down the filter media surface to the recovery area under gravity, reducing the risk of filter media clogging; lightweight and durable characteristics significantly extend service life, while reducing lubricating oil consumption by up to 30%, combining environmental benefits and economy.

[0028] Example 7: As attached Figure 1 As shown, the liquid collection device is a filter cone 11. The filter cone 11 is installed inside the lower valve body 3, and an installation ring 12 is installed on the outer side of the upper end of the filter cone 11 between the lower limit ring 9 and the lower valve body 3. During use, by setting the filter cone 11, it is convenient to collect and guide the large droplets formed by the adsorption of the filter cloth 10, so that the lubricating oil can flow back into the compressor. According to requirements, the filter cone 11, made of filter mesh, is mainly used to efficiently collect large droplets formed by the aggregation of the filter cloth 10 after adsorption. Its core function is to achieve directional recovery of oil through physical separation and gravity guidance. The cone structure of the filter cone 11 utilizes the large-aperture design (usually greater than 0.5 mm) of the inclined filter mesh surface to provide a low-resistance sliding channel for the aggregated liquid oil droplets, avoiding their accumulation on the filter material surface and causing blockage. At the same time, the convergence effect formed by the cone-shaped inner wall can accelerate the concentration of droplets to the bottom and directly return them to the crankcase, resulting in high recovery efficiency. Compared with the planar filter mesh, this cone structure significantly increases the effective collection area. In addition, the filter cone 11 can be treated with an oleophobic coating (such as polytetrafluoroethylene modification) to further reduce oil residue and ensure the continuity and stability of the recovery process. In summary, this design not only significantly reduces lubricant consumption (reducing additional oil replenishment requirements by more than 30%), but also prevents secondary atomization and escape of oil droplets, improving the system's environmental friendliness. At the same time, by actively separating the oil, it effectively reduces the load pressure on the filter cloth 10, extends its service life, reduces maintenance frequency, and enables the breather valve system to operate efficiently for a long time.

[0029] Example 8: As attached Figure 1 As shown, it also includes an O-ring seal 13. A sealing ring groove is provided on the upper outer side of the lower valve body 3, and an O-ring seal 13 is installed inside the sealing ring groove. The upper valve body 2 is fixedly installed on the lower outer side of the valve cap 1 via a threaded connection, and the lower valve body 3 is fixedly installed on the lower inner side of the upper valve body 2 via a threaded connection. An external thread is provided on the lower outer side of the lower valve body 3. During use, the valve cap 1 and the upper valve body 2 are connected by threads, facilitating the installation and replacement of the filter cloth 10; the upper valve body 2 and the lower valve body 3 are connected by threads, facilitating the installation and replacement of the filter cone 11. In addition, an O-ring seal 13 is provided at the connection between the lower valve body 3 and the compressor. Its core function is to achieve efficient sealing, preventing oil-containing gas or lubricating oil from leaking from the connection interface, while adapting to pressure fluctuations and temperature changes during compressor operation. Depending on the requirements, the O-ring, with its circular cross-section structure, fills the microscopic gaps of the mating surface through elastic deformation in a static sealing state, forming a reliable physical barrier, effectively preventing oil mist leakage, and avoiding environmental pollution and resource waste. Its materials (such as fluororubber, nitrile rubber, etc.) have excellent oil resistance, temperature resistance and resistance to compression set, and can maintain sealing stability under dynamic pressure environment for a long time. Especially when the pressure changes due to frequent opening and closing of the breather valve, it can compensate for the sealing stress through elastic rebound to ensure that there is no leakage at the connection.

[0030] The above technical features constitute the preferred embodiment of this utility model, which has strong adaptability and the best implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A compressor oil overflow prevention breather valve, characterized in that... It includes a valve cap, an upper valve body, a lower valve body, a left baffle plate, a right baffle plate, and baffle columns. The upper side of the valve cap is provided with several exhaust holes. The upper valve body is fixedly installed on the outer side of the lower end of the valve cap, and the lower valve body is fixedly installed on the inner side of the lower end of the upper valve body. At least two left baffle plates are provided at intervals on the inner side of the left part of the upper valve body. A right baffle plate is provided on the inner side of the right part of the upper valve body corresponding to the position between each two adjacent left baffle plates. The left baffle plates are inclined with the left side higher than the right side, and the right baffle plates are inclined with the left side lower than the right side. Several baffle columns are provided on the upper side of both the left and right baffle plates.

2. The compressor anti-oil overflow breather valve according to claim 1, characterized in that... The deflector columns include left deflector columns and right deflector columns. The upper side of the left deflector plate is provided with at least two rows of left deflector column groups that are spaced apart from left to right. Each row of left deflector column groups includes at least two left deflector columns that are spaced apart from front to back. The upper side of the right deflector plate is provided with at least two rows of right deflector column groups that are spaced apart from left to right. Each row of right deflector column groups includes at least two right deflector columns that are spaced apart from front to back.

3. The compressor oil overflow prevention breather valve according to claim 2, characterized in that... All left and right deflector columns are arranged in a trapezoidal array. The number of left deflector columns in each column of left deflector columns decreases from left to right, while the number of right deflector columns in each column of right deflector columns increases from left to right.

4. The compressor oil overflow prevention breather valve according to claim 1, 2, or 3, characterized in that... The angle between the left baffle and the upper valve body is the first angle, and the angle between the right baffle and the upper valve body is the second angle. Both the first and second angles are between 70° and 80°.

5. The compressor oil overflow prevention breather valve according to claim 1, 2, or 3, characterized in that... It also includes a filtration device and a liquid collection device. An upper limit ring platform is provided on the inner side of the upper valve body at the position between the left baffle and the valve cap, and a filtration device is provided between the valve cap and the upper limit ring platform. A lower limit ring platform is provided on the inner side of the lower part of the upper valve body at the position between the left baffle and the lower valve body, and a liquid collection device is provided between the lower limit ring platform and the lower valve body.

6. The compressor oil overflow prevention breather valve according to claim 4, characterized in that... It also includes a filtration device and a liquid collection device. An upper limit ring platform is provided on the inner side of the upper valve body at the position between the left baffle and the valve cap, and a filtration device is provided between the valve cap and the upper limit ring platform. A lower limit ring platform is provided on the inner side of the lower part of the upper valve body at the position between the left baffle and the lower valve body, and a liquid collection device is provided between the lower limit ring platform and the lower valve body.

7. The compressor oil overflow prevention breather valve according to claim 6, characterized in that... The filtration device is a filter cloth, which is made of polypropylene meltblown nonwoven fabric.

8. The compressor oil overflow prevention breather valve according to claim 6 or 7, characterized in that... The liquid collection device is a filter cone. The filter cone is installed in the lower valve body, and the upper outer side of the filter cone is provided with an installation ring platform installed between the lower limit ring platform and the lower valve body.

9. The compressor oil overflow prevention breather valve according to claim 1, 2, 3, 6, or 7, characterized in that... It also includes an O-ring seal, a sealing ring groove on the upper outer side of the lower valve body, and an O-ring seal inside the sealing ring groove; the upper valve body is fixedly installed on the lower outer side of the valve cap by a threaded connection, and the lower valve body is fixedly installed on the lower inner side of the upper valve body by a threaded connection, and the lower outer side of the lower valve body is provided with an external thread.

10. The compressor oil overflow prevention breather valve according to claim 8, characterized in that... It also includes an O-ring seal, a sealing ring groove on the upper outer side of the lower valve body, and an O-ring seal inside the sealing ring groove; the upper valve body is fixedly installed on the lower outer side of the valve cap by a threaded connection, and the lower valve body is fixedly installed on the lower inner side of the upper valve body by a threaded connection, and the lower outer side of the lower valve body is provided with an external thread.

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