Automatic oil discharge oil mist filter of vacuum pump

Abstract

The utility model relates to the technical field of filters, in particular to an automatic oil discharge oil mist filter of a vacuum pump, which comprises a body, an air inlet pipe, an exhaust pipe, an oil discharge pipe, a filter layer and a control valve, wherein the body is provided with a cavity, an air inlet pipe, an exhaust pipe and an oil discharge pipe, and is arranged on the body and communicated with the cavity; the filter layer is arranged in the cavity in the body and is positioned between the air inlet pipe and the air outlet pipe; according to the vacuum pump oil mist filter, centralized automatic oil discharge of the vacuum pump oil mist filter is achieved by controlling the vacuum pump and the normally-open electromagnetic valve to be opened and closed at the same time, the oil discharge mode does not enable a filtering layer to be in a saturated state, blocking of the filtering layer is avoided, and the vacuum pump oil mist filter is safe and reliable. And the lubricating oil in the vacuum pump cannot be polluted, so that the problems in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to an automatic oil-discharging oil mist filter for a vacuum pump. Background Art

[0002] Vacuum pumps may generate oil mist when working, especially those vacuum pumps with oil seal design. The generation of oil mist is usually caused by the evaporation or decomposition of lubricating oil inside the vacuum pump under high temperature or high pressure conditions. If these oil mists are discharged directly without treatment, they may pollute the environment and endanger the health of workers. In order to solve this problem, vacuum pump oil mist filters are used to capture and condense oil mist particles in the exhaust gas, thereby reducing the emission of oil mist.

[0003] At present, there are two relatively simple and easy-to-implement methods for draining oil from oil mist filters. One is to manually drain the oil by human judgment. This method cannot accurately determine the timing of draining the oil and whether the filter is saturated, and the operation is inconvenient. The other is to return the filtered oil to the vacuum pump through the return oil pipe and mix it with the lubricating oil in the vacuum pump to achieve the recycling of the filtered oil. However, the filtered oil filtered by some oil mist filters does not meet the recycling standard, which is easy to cause contamination of the lubricating oil in the vacuum pump. Long-term use is easy to damage the vacuum pump and shorten the service life of the vacuum pump. Utility Model Content

[0004] The utility model aims to provide an automatic oil-draining oil mist filter for a vacuum pump to solve the problems raised in the above-mentioned background technology.

[0005] The technical solution adopted by the utility model is:

[0006] An automatic oil-draining oil mist filter for a vacuum pump, comprising:

[0007] A body having a cavity inside;

[0008] An air inlet pipe, an exhaust pipe and an oil drain pipe are arranged on the body and communicated with the cavity;

[0009] The filter layer is disposed in the cavity in the body and between the air inlet pipe and the exhaust pipe;

[0010] A control valve is connected to the oil drain pipe and is used to control the opening or closing of the oil drain pipe.

[0011] Preferably, the filter layer is a multi-layer filter mesh.

[0012] Preferably, the multi-layer filter screen includes a first filter screen layer, a second filter screen layer and a third filter screen layer, a glass fiber filter material layer is arranged between the first filter screen layer and the second filter screen layer, and an oil droplet aggregation layer is arranged between the second filter screen layer and the third filter screen layer.

[0013] Preferably, the first filter screen layer, the glass fiber filter material layer, the second filter screen layer, the oil drop aggregation layer and the third filter screen layer are connected by bonding.

[0014] Preferably, the glass fiber filter material layer is folded or wavy.

[0015] Preferably, the filter layer is a filler or a filter element.

[0016] Preferably, it further comprises a support, which is arranged in the body, and the filter layer is placed on the support.

[0017] Preferably, it also includes a fixing frame, which is arranged in the body and placed on the filter layer.

[0018] Preferably, it also includes a head which is detachably arranged on the top of the body.

[0019] Preferably, it further comprises an air collecting chamber and a collection chamber, wherein the air collecting chamber is communicated with the exhaust pipe, and the collection chamber is communicated with the intake pipe and the oil drain pipe.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] In the utility model, the centralized and automatic oil drainage of the vacuum pump oil mist filter is achieved by controlling the simultaneous opening and closing of the vacuum pump and the normally open solenoid valve. This oil drainage method will not cause the filter layer to be in a saturated state, causing blockage of the filter layer, and will not cause pollution to the lubricating oil in the vacuum pump, thereby solving the problems in the current prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the overall structure of this application;

[0024] Figure 2 This is a schematic diagram of the filter layer structure of this application.

[0025] Reference numerals:

[0026] 1. Main body; 2. Air intake pipe;

[0027] 3. Filter layer; 31. First filter layer; 32. Glass fiber filter material layer; 33. Second filter layer; 34. Oil drop aggregation layer; 35. Third filter layer;

[0028] 4. Exhaust pipe; 5. Oil drain pipe; 6. Normally open solenoid valve; 7. Head; 8. Air collecting chamber; 9. Collection chamber; 10. Bracket; 11. Fixed bracket. DETAILED DESCRIPTION

[0029] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0033] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0034] like Figure 1-Figure 2 As shown, an embodiment of the utility model provides an automatic oil mist filter for a vacuum pump, comprising a main body 1, an air inlet pipe 2, a filter layer 3, an exhaust pipe 4, an oil drain pipe 5, a control valve, a head 7, an air collecting chamber 8, a collecting chamber 9, a bracket 10 and a fixing frame 11, etc.

[0035] The main body 1 has a cavity inside. The main body 1 mainly plays a supporting role and carries other components. An air intake pipe 2 is provided through the main body 1 in the radial direction adjacent to the bottom of the main body 1, and the oil mist gas generated when the vacuum pump is working is transported to the main body 1 through the air intake pipe 2. In order to better improve the sealing performance of the connection between the air intake pipe 2 and the vacuum pump, preferably, the flange sealing connection in this embodiment adopts a flat flange and a sealing groove flange that cooperate with each other (not shown in the figure), wherein a groove is provided on the sealing surface of the sealing groove flange, a sealing gasket is placed in the groove, and then the flat flange is placed on the sealing gasket, so that the flat flange and the sealing groove flange are aligned with each other, and finally the flat flange and the sealing groove flange are fixed together by bolts and nuts, so as to meet the requirements of the sealing connection between the air intake pipe 2 and the vacuum pump.

[0036] The filter layer 3 is arranged in the cavity of the main body 1, and the filter layer 3 separates the mist particles and other particulate matter in the oil mist gas from the oil mist gas. The filter layer 3 is located in the middle position of the main body 1, and divides the cavity of the main body 1 into an air collection chamber 8 and a collection chamber 9. The air collection chamber 8 is located above the collection chamber 9, and the collection chamber 9 mainly receives the oil mist gas transported from the air intake pipe 2 to the main body 1 and some oil droplets formed by the mist particles separated from the filter layer 3. The oil mist gas enters the collection chamber 9 through the air intake pipe 2 and is filtered by the filter layer 3. The separated clean gas enters the air collection chamber 8, and some oil droplets formed by the separated mist particles enter the collection chamber 9. Some oil droplets remain on the filter layer 3.

[0037] The filter layer 3 can be a filler, a filter element or a multi-layer filter. Preferably, in this embodiment, the filter layer 3 is a multi-layer filter, which includes a first filter 31, a second filter 33 and a third filter 35 in sequence along the flow direction of the oil mist gas in the body 1. Among them, a glass fiber filter material layer 32 is arranged between the first filter 31 and the second filter 33. The glass fiber filter material layer 32 allows the gas with oil mist to pass through the glass fiber filter material layer 32 in the form of collision, interception and aggregation, so that slightly larger mist particles are filtered and aggregated into oil droplets, which are distributed on the filter layer 3 and enter the collection chamber 9. The glass fiber filter material layer 32 can be folded or wavy, and the folded or wavy glass fiber filter material layer 32 expands the filtering area. An oil drop aggregation layer 34 is arranged between the second filter 33 and the third filter 35. The oil drop aggregation layer 34 can effectively remove tiny oil droplets through mechanisms such as diffusion, inertial collision and coagulation. The first filter screen layer 31, the glass fiber filter material layer 32, the second filter screen layer 33, the oil drop aggregation layer 34 and the third filter screen layer 35 are sequentially connected and fixed to each other by bonding.

[0038] An exhaust pipe 4 is connected to the main body on the side of the air collecting chamber 8. The projections of the exhaust pipe 4 and the intake pipe 2 on the same circular cross-section of the main body are in the same radial direction and are symmetrical. The clean gas separated by the filter layer 3 flows to the air collecting chamber 8 and is finally discharged into the outside air through the exhaust pipe 4.

[0039] The bottom of the body 1, that is, the bottom of the collecting chamber 9, is penetrated by an oil drain pipe 5, and a control valve is arranged on the oil drain pipe 5. The control valve and the oil drain pipe 5 are also connected by a flange seal. The control valve is used to control the opening or closing of the oil drain pipe 5. The control valve can be a normally open solenoid valve or a normally closed solenoid valve. Preferably, in this embodiment, the control valve is a normally open solenoid valve 6.

[0040] In order to facilitate replacement of the filter layer 3 in the cavity of the main body 1 , a detachable sealing head 7 is provided on the top of the main body 1 .

[0041] In order to support the filter layer 3, a support 10 is provided in the collection chamber 9. It includes a support column and a support plate. The support column is arranged on the bottom wall of the cavity of the body 1, and a support plate is arranged thereon. The support plate is a circular grid panel, and its diameter is substantially consistent with the diameter of the body 1, that is, the edge of the support plate fits with the inner wall of the body 1.

[0042] In order to fix the filter layer 3, a fixing frame 11 is arranged in the air collecting chamber 8, which includes a fixing column and a fixing plate. A fixing plate is arranged at one end of the fixing column, and the other end is fitted with the bottom of the head. The fixing plate is a circular grille panel, and the fixing plate is in contact with the third layer of filter screen 35. Similarly, the diameter of the fixing plate is basically consistent with the diameter of the main body 1.

[0043] In specific operation, first, when the vacuum pump is working, the normally open solenoid valve 6 is started to close the oil drain pipe 5. At this time, the oil mist gas generated by the vacuum pump is transported to the collection chamber 9 through the air inlet pipe 2. The oil mist gas in the collection chamber 9 rises to the filter layer 3. The filter layer 3 captures and removes the oil mist particles and other particles in the oil mist gas, so that the oil mist particles in the oil mist gas are separated and filtered. The separated and filtered oil mist particles accumulate for a long time to form oil droplets, part of which remain on the filter layer 3, and part of which enters the collection chamber 9. The clean gas flows to the gas collection chamber 8 and is finally discharged to the outside air through the exhaust pipe 4. When the vacuum pump stops running, the normally open solenoid valve 6 is closed at the same time as the vacuum pump stops running. At this time, the oil drain pipe 5 is in an open state, and the oil droplets on the filter layer 3 flow into the collection chamber 9 under the action of gravity. The oil droplets in the collection chamber 9 are also discharged from the body 1 through the oil drain pipe 5 under the action of gravity. Thereby, the automatic discharge of the oil droplets in the collection chamber 9 is realized.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A vacuum pump automatic oil exhaust oil mist filter, characterized in that: include: A body having a cavity inside; An air inlet pipe, an exhaust pipe and an oil drain pipe are arranged on the body and communicated with the cavity; The filter layer is disposed in the cavity in the body and between the air inlet pipe and the exhaust pipe; A control valve is connected to the oil drain pipe and is used to control the opening or closing of the oil drain pipe.

2. The vacuum pump automatic oil discharge oil mist filter according to claim 1, characterized in that: The filter layer is a multi-layer filter mesh.

3. The vacuum pump automatic oil discharge oil mist filter according to claim 2, characterized in that: The multi-layer filter screen comprises a first filter screen, a second filter screen and a third filter screen, a glass fiber filter material layer is arranged between the first filter screen and the second filter screen, and an oil drop aggregation layer is arranged between the second filter screen and the third filter screen.

4. The automatic oil-draining oil mist filter for vacuum pumps according to claim 3 is characterized by: The first filter screen layer, the glass fiber filter material layer, the second filter screen layer, the oil drop aggregation layer and the third filter screen layer are connected by bonding.

5. The vacuum pump automatic oil discharge oil mist filter according to claim 3 is characterized by: The glass fiber filter material layer is folded or waved.

6. The vacuum pump automatic oil discharge oil mist filter according to claim 1, characterized in that: The filter layer is a filler or a filter element.

7. The automatic oil-draining oil mist filter for vacuum pumps according to claim 1, characterized in that: It also includes a support, which is arranged in the body, and the filter layer is placed on the support.

8. The vacuum pump automatic oil discharge oil mist filter according to claim 1, characterized in that: It also includes a fixing frame, which is arranged in the body and placed on the filter layer.

9. The vacuum pump automatic oil discharge oil mist filter according to claim 1, characterized in that: It also includes a sealing head which is detachably arranged on the top of the body.

10. The automatic oil-draining oil mist filter for vacuum pumps according to claim 1, characterized in that: It also includes an air collection chamber and a collection chamber, wherein the air collection chamber is communicated with the exhaust pipe, and the collection chamber is communicated with the intake pipe and the oil drain pipe.

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