A vacuum pump pre-oil immersion filter

Abstract

The utility model belongs to vacuum pump technical field, concretely relates to a vacuum pump preposed oil immersion type filter, including support leg, the inside of support leg is provided with oil groove, the bottom fixed mounting of support leg has filter casing, the top of filter casing is fixedly installed with top cover through fixed component, wherein, the both sides welding of filter casing has air inlet and air outlet, the air inlet is communicated with the air outlet through filter casing, makes gas to pass through air inlet, air outlet and observation window in proper order, the inside of filter casing still is provided with oil mist filter assembly, and oil mist filter assembly sets up between air inlet and air outlet, the utility model discloses can set up oil bath and oil mist multiple filtration structure in the original or new filter casing, make the gas of inhaling first through oil bath cleaning, then through the oil -soaked filter material and carry out fine filtration.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum pump technology, specifically relating to a pre-oil immersion filter for vacuum pumps. Background Technology

[0002] A vacuum pump is a device used to extract gas from a closed space, thereby creating a pressure below atmospheric pressure within that space. Its main function is to reduce the gas pressure inside a container or system, creating a partial vacuum or high vacuum state. Currently, many vacuum pumps commonly use dry filters, such as cartridge filters or bag filters, at the inlet.

[0003] Problems with existing technology: Existing dry filters mainly rely on the surface of the filter media to intercept dust. When the amount of dust is large, the filter element will quickly become clogged, resulting in a sharp increase in air intake resistance, which will affect the pumping speed and ultimate vacuum of the vacuum pump. Furthermore, submicron-sized dust can easily penetrate the dry filter element and enter the pump chamber. Since the filter element is a consumable, it must be replaced after it becomes clogged, which not only increases the cost of spare parts but also increases the time and labor costs of downtime maintenance. In addition, dry filters are prone to caking and loss of filtration capacity when dealing with mixtures of oil mist, water vapor and dust. Utility Model Content

[0004] The purpose of this invention is to provide a pre-filter for a vacuum pump that can be configured with a multi-stage filtration structure of oil bath and oil mist within the existing or new filter housing. This allows the inhaled gas to be first cleaned by the oil bath and then finely filtered by the oil-impregnated filter media.

[0005] The specific technical solution adopted by this utility model is as follows: A pre-oil immersion filter for a vacuum pump includes a support leg, the inside of which is provided with an oil tank; A filter housing is fixedly installed at the bottom of the support leg, and a top cover is fixedly installed at the top of the filter housing by a fixing component. The filter housing has an air inlet and an air outlet welded on both sides. The air inlet is connected to the air outlet through the filter housing, allowing gas to pass through the air inlet, the air outlet, and the observation window in sequence. An oil mist filter assembly is also provided inside the filter housing, and the oil mist filter assembly is located between the air inlet and the air outlet.

[0006] A drain port is fixedly installed at the bottom of the filter housing, and the drain port is connected to the filter housing through an oil tank.

[0007] A filler port is also fixedly installed on one side of the filter housing, and the filler port is connected to the filter housing.

[0008] The oil mist filter assembly includes a frame, and four sets of the frame and stainless steel mesh are arranged accordingly. Three sets of support columns abut against the four sets of frames. A connecting screw is inserted into the inside of the support column, and a fixing nut is installed on the surface of the connecting screw.

[0009] The connecting screw is welded to the bottom frame, and the connecting screw, support column and fixing nut are arranged in four sets in a corresponding manner. A tie rod is welded to the top of the frame.

[0010] The fixing assembly includes a mounting base fixedly connected to one side of the filter housing, a locking screw hinged inside the mounting base, and a locking element threaded onto the external thread of the locking screw.

[0011] The locking element is used to push the connecting sleeve to abut against the mounting base, and the connecting sleeve is welded to the top cover, so that the connecting sleeve drives the bottom of the top cover to abut against the top of the filter housing.

[0012] The technical effects achieved by this utility model are as follows: This invention utilizes inlet and outlet ports on both sides of the filter housing to allow gas to enter the oil tank through the inlet. Since the inlet is below the oil surface, the inhaled gas bubbles in the oil, creating an "oil bath" effect. Most of the dust, water vapor, and sticky substances in the gas are captured and absorbed by the oil as the bubbles rise. The gas filtered through the "oil bath" can then be filtered for oil mist through an oil mist filter component with good oleophilic properties. Therefore, by combining oil bath and oil mist filtration, it has an all-round capture capability for dust (especially fine dust), water vapor, and oil mist, providing all-round protection for the vacuum pump.

[0013] Because the dust is stored in the entire oil rather than accumulating on the surface of the filter material, the dust holding capacity of this invention is several times or even dozens of times that of a dry filter of the same size.

[0014] Compared to existing dry filters, this invention eliminates the need for frequent replacement of expensive filter elements. Replacement is only required when the oil becomes excessively dirty, extending maintenance cycles and significantly reducing spare parts and labor costs. It also effectively prevents hard dust from entering the pump chamber, fundamentally reducing wear on the vacuum pump and extending overhaul cycles and service life. Furthermore, even if the oil contains a large amount of dust, the increase in air intake resistance is very slow, unlike the sudden clogging of dry filters. Attached Figure Description

[0015] Figure 1 This is a three-dimensional view of the overall installation structure of this utility model; Figure 2 This is a schematic diagram of the structure from another perspective in this utility model; Figure 3This is a schematic diagram of the cross-sectional structure of the filter housing in this utility model; Figure 4 This is a schematic diagram of the oil mist filter assembly structure in this utility model; Figure 5 This is a schematic diagram of the fixing component structure in this utility model.

[0016] The attached diagram lists the components represented by each number as follows: 1. Support leg; 2. Filter housing; 21. Air inlet; 22. Air outlet; 23. Observation window; 24. Oil filler neck; 25. Drain outlet; 26. Oil mist filter assembly; 261. Frame; 262. Stainless steel mesh; 263. Connecting screw; 264. Fixing nut; 265. Support column; 266. Pull rod; 3. Top cover; 4. Fixing assembly; 41. Mounting base; 42. Locking screw; 43. Connecting sleeve; 44. Locking element; 5. Oil tank. Detailed Implementation

[0017] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0018] like Figure 1-5 As shown, a vacuum pump pre-oil immersion filter includes a support leg 1, and an oil tank 5 is provided inside the support leg 1. A filter housing 2 is fixedly installed at the bottom of the support leg 1, and a top cover 3 is fixedly installed at the top of the filter housing 2 by a fixing component 4; The filter housing 2 has an air inlet 21 and an air outlet 22 welded on both sides. The air inlet 21 is connected to the air outlet 22 through the filter housing 2, so that the gas passes through the air inlet 21, the air outlet 22 and the observation window 23 in sequence. The filter housing 2 also has an oil mist filter assembly 26 inside, which is located between the air inlet 21 and the air outlet 22.

[0019] See attached document Figure 1 , Figure 2 and Figure 3 In this embodiment, a drain port 25 is fixedly installed at the bottom of the filter housing 2, and the drain port 25 is connected to the filter housing 2 through the oil tank 5.

[0020] In the above embodiments, the interior of the oil tank 5 is filled with oil for gas immersion filtration. The oil is preferably a special lubricating oil or the same type of pump oil that is compatible with the vacuum pump oil, so as to avoid chemical reaction.

[0021] Furthermore, since the oil tank 5 is connected to the drain port 25, the oil mixture generated by the oil immersion filtration can be discharged from the inside of the filter housing 2 through the oil tank 5 by opening the valve of the drain port 25.

[0022] Furthermore, a filler port 24 is fixedly installed on one side of the filter housing 2. The filler port 24 is connected to the filter housing 2. Therefore, by connecting the filler port 24 to the oil supply equipment and opening the valve of the filler port 24, new oil can enter the interior of the filter housing 2 through the filler port 24, thus realizing convenient oil replacement.

[0023] It should be noted that even if the oil inside the filter housing 2 contains a large amount of dust, the increase in its air intake resistance is very slow and will not suddenly clog like a dry filter, thus effectively extending the filter's maintenance cycle.

[0024] See attached document Figure 2 , Figure 3 and Figure 4 It is worth noting that the gas filtered by the oil bath inside the oil tank 5 rises and passes through the oil mist filter assembly 26. The oil mist filter assembly 26 includes a frame 261, in which four sets of frames 261 and stainless steel mesh 262 are arranged in an alternating layered manner. Therefore, some of the oil mist carried by the gas is intercepted here and flows back to the oil storage tank, reducing oil consumption.

[0025] Specifically, since three sets of support columns 265 abut against each other between the four sets of frames 261, and connecting screws 263 are inserted inside the support columns 265, and fixing nuts 264 are installed on the surface threads of the connecting screws 263, the four sets of frames 261 and stainless steel mesh 262 can be fixed into a whole through the cooperation of the connecting screws 263, fixing nuts 264 and support columns 265, and the spacing between the multi-layer frames 261 and stainless steel mesh 262 can also be flexibly adjusted.

[0026] More specifically, the connecting screw 263 is welded to the bottom frame 261, and the connecting screw 263, support column 265 and fixing nut 264 are correspondingly set and arranged in four sets around it. The top of the frame 261 is welded with a tie rod 266. Since the multi-layer frame 261 and stainless steel mesh 262 are a whole, and the tie rod 266 is located on the upper surface of the top frame 261, the oil mist filter assembly 26 can be easily removed and placed from the inside of the filter housing 2 through the tie rod 266.

[0027] See attached document Figure 1 and Figure 5Multiple mounting seats 41 are arranged around the outside of the filter housing 2. The mounting seats 41 are fixedly installed with the filter housing 2. The mounting seats 41 are hinged to the inside of the mounting seats 41, and the locking screws 42 are threaded with locking parts 44.

[0028] Furthermore, when the locking member 44 is rotated, the connecting sleeve 43 can be pushed to abut against the mounting base 41. Since the connecting sleeve 43 and the mounting base 41 are correspondingly arranged, and the connecting sleeve 43 is welded to the top cover 3, the connecting sleeve 43 causes the bottom of the top cover 3 to abut against the top of the filter housing 2, thereby facilitating the disassembly and assembly of the top cover 3 and the filter housing 2, and also facilitating the cleaning of the inner wall of the filter housing 2 and the oil mist filter assembly 26.

[0029] The working principle of this utility model is as follows: After the top cover 3 is unlocked by the fixing component 4, the top cover 3 can be removed. After the oil mist filter component 26 is placed on the positioning block welded inside the filter housing 2, the top cover 3 is sealed to the top of the filter housing 2 by the action of the fixing component 4. Oil is added into the filter housing 2 by opening the valve of the oil filling port 24 until it overflows the air inlet 21. Then the air outlet 22 is connected to the air inlet pipe of the vacuum pump. At the same time, the air inlet 21 is connected to the evacuated equipment. When the vacuum pump is started, gas is introduced through the air inlet. The gas enters the interior of the filter housing 2 through port 21 and directly enters the interior of the oil. After being filtered by the oil bath, the gas carrying part of the oil passes through the oil mist filter assembly 26 again. After being separated and filtered by the oil mist filter assembly 26, the gas is discharged through the outlet 22 and the vacuum pump. If there is too much dust in the oil inside the filter housing 2, the oil can be drained by opening the valve of the drain port 25. Then, the top cover 3 can be opened to clean the inner wall of the filter housing 2 and the oil mist filter assembly 26. After that, fresh oil can be injected again through the oil filler port 24 for continued use.

[0030] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A pre-oil immersion filter for a vacuum pump, characterized in that, include: Support leg (1), the inside of which is provided with oil groove (5); A filter housing (2) is fixedly installed at the bottom of the support leg (1), and a top cover (3) is fixedly installed at the top of the filter housing (2) by a fixing component (4). The filter housing (2) has an air inlet (21) and an air outlet (22) welded on both sides. The air inlet (21) is connected to the air outlet (22) through the filter housing (2), so that the gas passes through the air inlet (21), the air outlet (22) and the observation window (23) in sequence. The filter housing (2) is also provided with an oil mist filter assembly (26), which is located between the air inlet (21) and the air outlet (22).

2. The pre-oil immersion filter for a vacuum pump according to claim 1, characterized in that: The bottom of the filter housing (2) is fixedly installed with a drain port (25), which is connected to the filter housing (2) through an oil tank (5).

3. The pre-oil immersion filter for a vacuum pump according to claim 2, characterized in that: A filler port (24) is also fixedly installed on one side of the filter housing (2), and the filler port (24) is connected to the filter housing (2).

4. The pre-oil immersion filter for a vacuum pump according to claim 1, characterized in that: The oil mist filter assembly (26) includes a frame (261), and four sets of the frame (261) and stainless steel mesh (262) are provided respectively. Three sets of support columns (265) are abutted between the four sets of the frame (261). A connecting screw (263) is inserted into the inside of the support column (265), and a fixing nut (264) is installed on the surface thread of the connecting screw (263).

5. A vacuum pump pre-oil immersion filter according to claim 4, characterized in that: The connecting screw (263) is welded to the bottom frame (261), and the connecting screw (263), support column (265) and fixing nut (264) are correspondingly arranged and arranged in four sets around it. A tie rod (266) is welded to the top of the frame (261).

6. The pre-oil immersion filter for a vacuum pump according to claim 1, characterized in that: The fixing component (4) includes a mounting base (41) fixedly connected to one side of the filter housing (2), a locking screw (42) is hinged inside the mounting base (41), and a locking element (44) is threaded on the outside of the locking screw (42).

7. A vacuum pump pre-oil immersion filter according to claim 6, characterized in that: The locking member (44) is used to push the connecting sleeve (43) to abut against the mounting base (41), and the connecting sleeve (43) is welded to the top cover (3), so that the connecting sleeve (43) drives the bottom of the top cover (3) to abut against the top of the filter housing (2).

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