Oil mist separator

Abstract

The utility model relates to the technical field of oil mist separation, in particular to an oil mist separator which comprises a base, a sleeve shell, a filter element, a filter screen and an end cover, and the upper portion of the base and the lower portion of the sleeve shell are fixedly installed together. The oil-gas separator is reasonable and compact in structure, the filter element, the base, the filter element, the sleeve shell and the end cover are arranged to form the circulation cavity for oil-gas circulation, the gas inlet is communicated with the gas outlet of the compressor oil tank, and oil gas generated in the compressor oil tank enters the filter element from the gas inlet of the base; when oil mist enters the circulating cavity through the filter element from inside to outside, the oil mist collides with the filter element, the temperature and the flow speed are sharply reduced, the oil mist is condensed into oil liquid, the condensed oil liquid is retained in the circulating cavity, separated gas is exhausted, and therefore condensed oil formed after the oil mist is condensed can flow back to an oil tank of the compressor, and the oil mist is condensed into the oil tank of the compressor. Potential safety hazards caused by oil contamination in production are eliminated, and meanwhile the use cost of the lubricating oil is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oil mist separation, and is an oil mist separator. Background Art

[0002] With the increasing number of compressors used in chemical production, the amount of lubricating oil filled inside during mechanical operation is also increasing. When the machine is running, the filled lubricating oil is collided at high speed, resulting in an increase in the temperature of the lubricating oil, an increase in the oil-gas pressure inside the equipment, and the generation of a large amount of oil mist, which will cause leakage to varying degrees. To prevent the oil mist from being discharged outside the equipment and polluting the machine body itself and the atmospheric environment, an oil mist separator is usually used for purification treatment.

[0003] At present, domestic unit manufacturers design fewer oil mist separators, and the structures are relatively old. Most of them use long-tube external discharge type to directly discharge to the atmosphere. In this way, some oil and gas carried in the oil mist are discharged outside the compressor without effective separation. The discharged oil mist harms the respiratory system and health of workers, increasing the probability of occupational diseases and the labor protection expenses of enterprises; some oil and gas accumulate into drops and directly drip on the machine body and the ground, which is likely to cause industrial injury accidents and fires for employees; the oil mist in the air will also cause failures in the electrical parts of the compressor, increasing the maintenance cost.

[0004] Chinese patent document with publication number CN112755675A discloses an oil mist separator, which includes an oil mist separator body. An air inlet pipe and an air outlet pipe are respectively arranged at both ends of the oil mist separator body. The air inlet pipe and the air outlet pipe are respectively fixed on the air suction end cover and the exhaust end cover. An air suction turbine, a first filtering device, a second filtering device and a motor are arranged inside the oil mist separator body. The first filtering device is in contact with the second filtering device. A motor is arranged inside the second filtering device. The motor passes through the first filtering device and is drivably connected to the air suction turbine. Support plates are symmetrically arranged at the bottom of the oil mist separator body. An oil discharge pipeline is arranged between the two support plates. The oil discharge pipeline is respectively communicated with the first filtering device and the second filtering device.

[0005] The Chinese patent document with the publication number CN208599342U also discloses an oil mist separator, which includes a body, a filter and an air purifier. One side of the body is fixedly connected to the front cover of the body through two first screws. An air inlet is provided in the middle of the front cover of the body. The other side of the body is fixedly connected to the rear cover of the body through two second screws. The middle of the rear cover of the body is communicated with the input end at the bottom of the air purifier through a connecting pipe. An air outlet is provided on one side of the air purifier. An oil storage chamber is provided at the bottom of the body. The bottom of the oil storage chamber is communicated with the top end of the filter through a round pipe. A second oil outlet is provided at the bottom end of the filter. Inside the body, a first filter group, a second filter group, an annular magnet and a motor are arranged in sequence from left to right. First oil outlets are provided at the bottom ends of the first filter group and the second filter group. The output end of the motor is fixedly connected to one end of an impeller shaft. The other end of the impeller shaft is fixedly connected to the middle of the impeller. Electric heaters are provided in the middle of each blade of the impeller, and the impeller is inside the annular magnet. A third filter group is provided outside the motor. A first oil outlet is provided at the bottom of the third filter group. The three first oil outlets are all communicated with the inside of the oil storage chamber. The motor and the air purifier are both electrically connected to an external power supply through switches.

[0006] Although the above two oil mist separators can better assist in oil mist separation, their structural designs are relatively complex, with a large number of components, and the maintenance and repair costs are high. Summary of the Invention

[0007] The utility model provides an oil mist separator, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problems of relatively complex structural design and high maintenance and repair costs existing in the existing oil mist separators.

[0008] The technical solution of the utility model is realized by the following measures: An oil mist separator includes a base, a sleeve housing, a filter element, a filter screen and an end cover. The upper part of the base is fixedly installed together with the lower part of the sleeve housing. An air inlet that penetrates up and down is provided at the lower end of the base. A filter element sleeved inside the sleeve housing is detachably and fixedly installed at the upper end of the base corresponding to the air inlet position. An end cover is fixedly installed at the upper part of the sleeve housing corresponding to the position above the filter element. An air outlet that penetrates up and down is provided at the upper end of the end cover. A filter screen is detachably and fixedly installed at the lower end of the end cover corresponding to the air outlet position.

[0009] The following is a further optimization or / and improvement of the above-mentioned technical solution of the utility model:

[0010] A support cylinder can be fixedly installed at the upper end of the base. The support cylinder has a cylindrical structure with an open lower end and a closed upper end. The filter element is sleeved outside the support cylinder. A plurality of internally and externally connected communication holes are spaced apart on the outside of the support cylinder corresponding to the position of the filter element. A gland is fixedly installed at the upper end of the support cylinder corresponding to the upper end of the filter element, and an upper limit ring sleeved on the outside of the upper end of the filter element is fixedly installed at the lower end of the gland.

[0011] A positioning post can be fixed at the upper end of the support cylinder. A positioning groove matching the positioning post is provided at the lower end of the gland. A connecting screw hole penetrating up and down is provided at the upper end of the positioning post. An installation through hole extending to the upper end face of the gland is provided on the inner wall of the upper part of the positioning groove. A positioning screw rod with its outer side of the lower part sealingly screwed into the connecting screw hole is provided in the installation through hole.

[0012] A lower limit ring sleeved on the outside of the lower end of the filter element can be fixed on the upper side of the base corresponding to the lower end position of the filter element. The outer side of the lower limit ring is fixedly installed together with the inner side of the lower end of the casing.

[0013] An installation sleeve can be fixedly installed at the lower end of the end cover. The outside of the installation sleeve is sleeved on the inner side of the upper part of the casing. A filter screen is sleeved on the inner side of the installation sleeve. An upper pressing ring is fixedly installed on the inner side of the upper part of the installation sleeve corresponding to the upper side position of the filter screen, and a lower pressing ring is fixedly installed on the inner side of the installation sleeve corresponding to the lower side position of the filter screen.

[0014] The inner diameter of the lower pressing ring, the inner diameter of the upper pressing ring, and the diameter of the air outlet can be gradually reduced in sequence.

[0015] Connecting threads can be provided on the inner wall of the lower part of the air inlet hole.

[0016] The structure of the present utility model is reasonable and compact. By providing a filter element, a cycle chamber for oil and gas circulation is formed by the base, the filter element, the casing, and the end cover. The air inlet is communicated with the air outlet of the compressor oil tank. The oil and gas generated in the compressor oil tank enter the inside of the filter element from the air inlet of the base. When the oil mist passes from the inside to the outside through the filter element and enters the cycle chamber, the oil mist collides with the filter element, and the temperature and flow rate drop sharply, thereby condensing into an oil liquid. The condensed oil liquid is retained in the cycle chamber, and the separated gas is discharged. When the oil mist condenses in the cycle chamber and undergoes two-stage separation, the oil and gas separation is completed. The condensed oil will flow back along the casing to the air inlet and finally flow into the compressor oil tank. The separated gas is discharged to the atmosphere. In this way, the condensed oil formed after the condensation of the oil mist can flow back to the compressor oil tank, eliminating the safety hazards caused by oil pollution in production, and at the same time reducing the use cost of the lubricating oil. The filter element and the filter net can be disassembled, cleaned, and then reinstalled. The structure is simple, the disassembly and assembly are convenient, and it can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 is the main sectional view structure diagram of Embodiments 1 to 7 of the present utility model.

[0018] The codes in the attached drawings are as follows: 1 is the base, 2 is the casing shell, 3 is the filter element, 4 is the filter screen, 5 is the end cap, 6 is the air inlet, 7 is the air outlet, 8 is the support cylinder, 9 is the communication hole, 10 is the gland, 11 is the upper limit ring, 12 is the positioning post, 13 is the positioning screw, 14 is the lower limit ring, 15 is the mounting sleeve, 16 is the upper compression ring, 17 is the lower compression ring, and 18 is the circulation chamber. Detailed implementation manners

[0019] The present utility model is not limited by the following embodiments, and the specific implementation manners can be determined according to the technical solution of the present utility model and the actual situation.

[0020] In the present utility model, for the convenience of description, the description of the relative position relationship of each component is carried out according to the layout mode of the attached drawings of the specification. For example, the position relationships such as front, rear, upper, lower, left, and right are determined according to the layout direction of the attached drawings of the specification. Figure 1 of the specification. Figure 1 of the specification.

[0021] The present utility model will be further described below in conjunction with the embodiments and the attached drawings:

[0022] Embodiment 1: As shown in the attached Figure 1 drawings, the oil mist separator includes a base 1, a casing shell 2, a filter element 3, a filter screen 4, and an end cap 5. The upper part of the base 1 is fixedly installed with the lower part of the casing shell 2. The lower end of the base 1 is provided with an air inlet 6 that penetrates up and down. At the upper end of the base 1 corresponding to the position of the air inlet 6, a filter element 3 sleeved inside the casing shell 2 is detachably and fixedly installed. At the upper part of the casing shell 2 corresponding to the position above the filter element 3, an end cap 5 is fixedly installed. The upper end of the end cap 5 is provided with an air outlet 7 that penetrates up and down. At the lower end of the end cap 5 corresponding to the position of the air outlet 7, a filter screen 4 is detachably and fixedly installed.

[0023] According to requirements, the filter element 3 is a known honeycomb filter element in the prior art. The pore density of the filter element 3 can be 50 pieces per square inch. The material of the filter element 3 can be stainless steel, polypropylene, or asbestos. The filter screen 4 is a mesh structure. The mesh number of the filter screen 4 ≥ 200 meshes. The material of the filter screen 4 includes stainless steel, asbestos, pp cotton, and glass fiber.

[0024] During use, by setting the filter element 3, the base 1, the filter element 3, the sleeve housing 2 and the end cap 5 form a circulation chamber 18 for oil-gas circulation. The air inlet 6 is connected to the air outlet 7 of the compressor oil tank. The oil-gas generated in the compressor oil tank enters the interior of the filter element 3 from the air inlet 6 of the base 1. When the oil mist passes from the inside to the outside through the filter element 3 and enters the circulation chamber 18, the oil mist collides with the filter element 3, and the temperature and flow rate decrease sharply, thus condensing into oil liquid. The condensed oil liquid is retained in the circulation chamber 18, and the separated gas is discharged. When the oil mist condenses in the circulation chamber 18 and after two-stage separation, the oil-gas separation is completed. The condensed oil will flow back along the sleeve housing 2 to the air inlet 6 and finally flow into the compressor oil tank. The separated gas is discharged to the atmosphere. In this way, the condensed oil formed after the condensation of the oil mist can flow back to the compressor oil tank, eliminating the safety hazards caused by oil pollution in production. At the same time, the use cost of the lubricating oil is reduced. The filter element 3 and the filter net 4 can be disassembled, cleaned and then reinstalled. The structure is simple, the disassembly and assembly are convenient, and it can be reused.

[0025] Through the circulation chamber 18, the present utility model can reduce the temperature and flow rate of the oil mist, enhancing the oil mist separation effect. The design structure of the present utility model is simple, with fewer components and convenient installation and disassembly, easy maintenance and low maintenance cost.

[0026] According to actual needs, the above oil mist separator can be further optimized and / or improved:

[0027] Embodiment 2: As an optimization of the above embodiment, as shown in the appendix Figure 1 As shown, a support cylinder 8 is fixedly installed at the upper end of the base 1. The support cylinder 8 has a cylindrical structure with an open lower end and a closed upper end. The filter element 3 is sleeved outside the support cylinder 8. A plurality of internally and externally connected communication holes 9 are spaced apart on the outside of the support cylinder 8 corresponding to the position of the filter element 3. A gland 10 is fixedly installed at the upper end of the support cylinder 8 corresponding to the upper end position of the filter element 3. A upper limit ring 11 sleeved outside the upper end of the filter element 3 is fixedly installed at the lower end of the gland 10. During use, with such a setting, it can not only support the filter element 3, reduce the impact of the oil mist on the filter element 3, and extend the service life of the filter element 3, but also prevent the filter element 3 from slipping and misaligning during use, which reduces the oil mist separation efficiency, and is also convenient for the maintenance and replacement of the filter element 3.

[0028] Embodiment 3: As an optimization of the above embodiment, as shown in the appendix Figure 1As shown in the figure, a positioning post 12 is fixed to the upper end of the support cylinder 8, a positioning groove matching the positioning post 12 is provided at the lower end of the gland 10, a connecting screw hole penetrating through the upper and lower ends is provided at the upper end of the positioning post 12, an installation through hole with an upper end extending to the upper end surface of the gland 10 is provided on the inner wall of the upper part of the positioning groove, and a positioning screw 13 with an outer side of the lower part hermetically screwed into the connecting screw hole is provided in the installation through hole. During use, with such a setting, the gland 10 and the support cylinder 8 can be quickly installed together, facilitating the disassembly, assembly and maintenance of the filter element 3.

[0029] Embodiment 4: As an optimization of the above embodiment, as shown in the appended Figure 1 figure, a lower limit ring 14 sleeved on the outer side of the lower end of the filter element 3 is fixedly installed on the upper side of the base 1 corresponding to the position of the lower end of the filter element 3, and the outer side of the lower limit ring 14 is fixedly installed together with the inner side of the lower end of the sleeve housing 2. During use, with such a setting, the upper and lower ends of the filter element 3 can be limited, improving the stability of the filter element 3 during use.

[0030] Embodiment 5: As an optimization of the above embodiment, as shown in the appended Figure 1 figure, an installation sleeve 15 is fixedly installed at the lower end of the end cover 5, the installation sleeve 15 is sleeved on the inner side of the upper part of the sleeve housing 2, the filter screen 4 is sleeved on the inner side of the installation sleeve 15, an upper pressing ring 16 is fixedly installed on the inner side of the upper part of the installation sleeve 15 corresponding to the upper side position of the filter screen 4, and a lower pressing ring 17 is fixedly installed on the inner side of the installation sleeve 15 corresponding to the lower side position of the filter screen 4. During use, when the lower end of the upper pressing ring 16 approaches the upper end of the upper pressing ring 16, the filter screen 4 can be clamped, playing a supporting role for the filter screen 4 and enhancing the strength and stability of the filter screen 4 during use.

[0031] Embodiment 6: As an optimization of the above embodiment, as shown in the appended Figure 1 figure, the inner diameter of the lower pressing ring 17, the inner diameter of the upper pressing ring 16, and the diameter of the air outlet 7 decrease in sequence. According to requirements, both the upper pressing ring 16 and the lower pressing ring 17 are well-known prior arts, such as nuts, and the lower pressing ring 17, the upper pressing ring 16, and the air outlet are coaxially arranged. During use, with such a setting, the flow path of the mist flows from the large hole through the small hole, increasing the path length and friction of the medium leakage, thereby reducing the direct discharge of the oil mist and strengthening the separation effect.

[0032] Embodiment 7: As an optimization of the above embodiment, as shown in the appended Figure 1 figure, connecting threads are provided on the inner wall of the lower part of the air inlet hole. This facilitates the fixed installation of the base 1 and the compressed oil tank together, and the disassembly and assembly are more convenient.

[0033] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effects. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

[0034] Usage process of the best embodiment of the utility model: When the machine is running, due to the collision between the machine and the lubricating oil, the oil temperature rises to form oil and gas with a certain pressure. The oil and gas enters through the air inlet 6. When the oil and gas flow through the filter element 3, since the honeycomb pores of the honeycomb filter element are densely distributed, the high-speed oil and gas collide with it initially, and most of the oil and gas are condensed on the outer surface of the honeycomb filter element. As they accumulate, they condense into oil and flow back to the circulation chamber 18. A small amount of oil and gas is sprayed onto the filter net 4, and the filter net 4 enables the oil and gas to form oil and flow back to the circulation chamber 18. An extremely small amount of oil and gas can reach the air outlet 7. Due to the variable diameter design of the upper pressing ring 16 and the lower pressing ring 17 and the air outlet 7, all the oil flows back from the circulation chamber 18 to the air inlet 6, realizing oil mist separation and circulation.

Claims

1. An oil mist separator, characterized in that It includes a base, a sleeve shell, a filter element, a filter screen and an end cover. The upper part of the base is fixedly installed with the lower part of the sleeve shell. The lower end of the base is provided with an air inlet which passes through from top to bottom. The upper end of the base corresponding to the air inlet position is detachably fixedly installed with a filter element mounted on the inner side of the sleeve shell. The upper part of the sleeve shell corresponding to the position above the filter element is fixedly installed with an end cover. The upper end of the end cover is provided with an air outlet which passes through from top to bottom. The lower end of the end cover corresponding to the air outlet position is detachably fixedly installed with a filter screen.

2. The oil mist separator according to claim 1, characterized in that A support cylinder is fixedly installed on the upper end of the base. The support cylinder is a cylindrical structure with an open lower end and a closed upper end. The filter element is mounted on the outside of the support cylinder. A number of connecting holes that connect the inside and the outside are spaced apart on the outside of the support cylinder corresponding to the position of the filter element. A pressure cap is fixedly installed on the upper end of the support cylinder corresponding to the upper end of the filter element, and an upper limit ring mounted on the outer side of the upper end of the filter element is fixedly installed on the lower end of the pressure cap.

3. The oil mist separator according to claim 2, characterized in that A positioning column is fixed at the upper end of the support cylinder, a positioning groove matching the positioning column is provided at the lower end of the pressure cover, a connecting screw hole passing through the upper and lower ends is provided at the upper end of the positioning column, a mounting through hole is provided on the upper inner wall of the positioning groove, and the mounting through hole is provided with a positioning screw which is sealed and screwed on the lower outer side in the connecting screw hole.

4. The oil mist separator according to claim 1, 2 or 3, characterized in that A lower limit ring sleeved on the outer side of the lower end of the filter element is fixed on the upper side of the base corresponding to the lower end position of the filter element, and the outer side of the lower limit ring is fixedly installed with the inner side of the lower end of the sleeve shell.

5. The oil mist separator according to claim 1, 2 or 3, characterized in that An installation sleeve is fixedly installed at the lower end of the end cover, the outer side of the installation sleeve is sleeved on the inner side of the upper part of the sleeve shell, the filter screen is sleeved on the inner side of the installation sleeve, an upper clamping ring is fixedly installed on the inner side of the upper part of the installation sleeve corresponding to the upper position of the filter screen, and a lower clamping ring is fixedly installed on the inner side of the installation sleeve corresponding to the lower position of the filter screen.

6. The oil mist separator according to claim 4, characterized in that An installation sleeve is fixedly installed at the lower end of the end cover, the outer side of the installation sleeve is sleeved on the inner side of the upper part of the sleeve shell, the filter screen is sleeved on the inner side of the installation sleeve, an upper clamping ring is fixedly installed on the inner side of the upper part of the installation sleeve corresponding to the upper position of the filter screen, and a lower clamping ring is fixedly installed on the inner side of the installation sleeve corresponding to the lower position of the filter screen.

7. The oil mist separator according to claim 5, characterized in that The inner diameter of the lower clamping ring, the inner diameter of the upper clamping ring, and the diameter of the air outlet decrease in sequence.

8. The oil mist separator according to claim 6, characterized in that The inner diameter of the lower clamping ring, the inner diameter of the upper clamping ring, and the diameter of the air outlet decrease in sequence.

9. The oil mist separator according to claim 1 or 2 or 3 or 6 or 7 or 8, characterized in that A connecting thread is arranged on the inner wall of the lower part of the air inlet hole.

10. The oil mist separator according to claim 4, characterized in that A connecting thread is arranged on the inner wall of the lower part of the air inlet hole.

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