Filter and vacuum pump assembly comprising same

Abstract

The utility model provides a filter and a vacuum pump assembly including the same, the filter comprises a shell and at least two different filter layers, the at least two different filter layers are arranged in the shell in sequence so that gas passes through the at least two different filter layers in sequence, and the filter layers are detachably connected with the shell. At least two different filter layers are arranged in the filter, so that the filter can perform more than two stages of filtration, a better filtration effect is achieved, the gas pressure borne by each stage of filter layer during filtration is reduced, the service life of the filter layer is prolonged, and meanwhile, the filter layer and the shell are detachably connected, so that the filter layer is convenient to clean and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production filters, in particular to a filter and a vacuum pump component comprising the filter. Background Art

[0002] Vacuum pumps play an important role in the chemical synthesis production process, such as vacuum feeding, vacuum drying, vacuum distillation, etc. In order to ensure the normal use of the vacuum pump in the production process and reduce the maintenance or repair frequency of the pump, a filter device is often added to the front end of the vacuum pump. However, the design of the existing filter device has limited filtering effect, and the filter element of the existing filter device is not easy to disassemble, which is not conducive to cleaning and maintenance. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the filter in the prior art that the filter has a single filtering type and the filtering layer is difficult to clean, and to provide a filter and a vacuum pump component containing the same.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] The utility model provides a filter for a vacuum pump, which is characterized in that the filter comprises a shell and at least two different filter layers, the at least two different filter layers are arranged in sequence inside the shell so that gas passes through the at least two different filter layers in sequence, and the filter layers and the shell are detachably connected.

[0006] In this solution, at least two different filter layers are arranged in the filter, so that the filter can perform more than two levels of filtration, with a better filtering effect, and reduce the gas pressure that each level of filter layer is subjected to during filtration, thereby extending the service life of the filter layer. At the same time, the filter layer and the shell are detachably connected to facilitate the cleaning and maintenance of the filter layer.

[0007] Preferably, there are three types of filter layers, and gaps are provided between adjacent filter layers.

[0008] In this solution, providing gaps between adjacent filter layers can provide a buffer for the downstream filter layer, thereby preventing an excessively fast flow rate from damaging the downstream filter layer.

[0009] Preferably, the gaps between adjacent filter layers are of the same size; and the plane where each filter layer is located is perpendicular to the flow direction of the gas in the filter.

[0010] In this solution, the gaps between the filter layers are of the same size, and the planes where the filter layers are located are perpendicular to the gas flow direction in the filter, which is conducive to the gas entering the filter layer evenly and improves the filtering efficiency.

[0011] Preferably, the filter layer comprises a dust filter layer and a liquid filter layer, the dust filter layer and the liquid filter layer are arranged inside the shell, and the liquid filter layer is arranged downstream of the dust filter layer.

[0012] In this solution, a dust filter layer is set in the shell, and a liquid filter layer is set downstream of the dust filter layer. The filtration is divided into two stages, first filtering the dust and then filtering the liquid, so as to avoid dust clogging the liquid filter layer and improve the life and filtration efficiency of the liquid filter layer.

[0013] Preferably, the filter further comprises a non-condensable gas filter layer, wherein the non-condensable gas filter layer is arranged inside the shell, and the non-condensable gas filter layer is arranged downstream of the liquid filter layer.

[0014] In this scheme, a non-condensable gas filter layer is set in the shell to further filter the non-condensable gas, prevent the non-condensable gas from reacting with the liquid to form solid particles that damage the subsequent equipment, and improve the filtering effect. At the same time, a non-condensable gas filter layer is set downstream of the liquid filter layer to avoid dust and oily liquid from clogging the non-condensable gas filter layer, thereby improving the filtration efficiency and life of the non-condensable gas filter layer.

[0015] Preferably, the dust filter layer comprises a filter cloth and a bracket, the surface of the bracket is provided with mesh holes, and the filter cloth covers the surface of the bracket; the liquid filter layer uses a porous material as a filter element; and the non-condensable gas filter layer uses a microporous material as a filter element.

[0016] In this solution, a filter cloth is used to cover the surface of the bracket to form a dust filter layer, which has a simple structure and a good filtering effect. The mesh holes on the surface of the bracket not only improve the strength of the bracket, but also increase the speed at which the liquid passes through the bracket, thereby improving the filtering efficiency.

[0017] Preferably, the shell includes an air inlet portion, an exhaust portion and a cylindrical portion, the cylindrical portion accommodates the filter layer, the air inlet portion, the cylindrical portion and the exhaust portion are connected to form a gas channel, and the diameter of the cylindrical portion is larger than the diameter of the inlet end of the air inlet portion and the outlet end of the exhaust portion.

[0018] In the present scheme, the shell is composed of an air intake part, an exhaust part, and a cylindrical part. The diameter of the cylindrical part is larger than the inlet end of the air intake part and the outlet end of the exhaust part, which is beneficial to the connection between the air intake part and the front-end pipeline and the outlet end of the exhaust part and the rear-end pipeline. The cylindrical part has a larger diameter. When the gas flows into the cylindrical part, the flow velocity of the gas will be reduced, thereby protecting the filter layer. At the same time, the larger diameter of the cylindrical part increases the area of ​​the filter layer, so that more gas can be filtered at the same time, thereby improving the filtration efficiency.

[0019] Preferably, the air inlet portion and the exhaust portion are connected to the cylindrical portion via flange buckles; and gaskets are provided at the connection between the air inlet portion and the exhaust portion and the cylindrical portion.

[0020] In this solution, the air inlet and exhaust parts are connected to the cylindrical part through flange buckles, which are easy to disassemble and clean while being firmly connected. Gaskets are arranged at the connection between the air inlet and exhaust parts and the cylindrical part to improve the sealing. The use of this solution improves the stability of the filter.

[0021] Preferably, a gap is provided between the filter layer and the end of the cylindrical portion, and the gap between the filter layer and the end of the cylindrical portion is larger than a gap between adjacent filter layers.

[0022] In this solution, a gap is provided between the filter layer and the end of the cylindrical portion to play a buffering role. The gap between the filter layer and the end of the cylindrical portion is larger than the gap between adjacent filter layers. This is beneficial for providing more gas buffer space when the flow rate at the inlet and outlet of the filter is fast, which is beneficial for protecting the filter layer and extending the life of the filter layer.

[0023] The utility model also provides a vacuum pump assembly, which is characterized in that the vacuum pump assembly comprises a vacuum pump and a filter, and the outlet of the filter is communicated with the air inlet of the vacuum pump.

[0024] In this solution, the outlet of the filter is connected to the air inlet of the vacuum pump, which prevents dust from entering the vacuum pump, protects the vacuum pump, reduces the maintenance and repair frequency of the vacuum pump, and thus improves the working efficiency of the vacuum pump.

[0025] The positive progressive effect of the utility model is that at least two different filter layers are arranged in the filter, so that the filter can perform more than two levels of filtering, has a better filtering effect, and reduces the gas pressure that each level of filter layer bears during filtering, thereby extending the service life of the filter layer. At the same time, the filter layer and the shell are detachably connected to facilitate the cleaning and maintenance of the filter layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the filter in the utility model.

[0027] Description of reference numerals: housing 1, air inlet 11, exhaust 12, cylindrical portion 13, filter layer 2, dust filter layer 21, liquid filter layer 22, non-condensable gas filter layer 23, gas flow direction P1. DETAILED DESCRIPTION

[0028] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0029] like Figure 1As shown, this embodiment provides a filter for a vacuum pump, the filter comprising a shell 1 and at least two different filter layers 2, the at least two different filter layers 2 are sequentially arranged inside the shell 1 so that the gas passes through the at least two different filter layers 2 successively, and the filter layers 2 and the shell 1 are detachably connected.

[0030] In this embodiment, at least two different filter layers 2 are arranged in the filter, so that the filter can perform more than two levels of filtration, have a better filtering effect, and reduce the gas pressure that each level of filter layer 2 is borne during filtration, thereby extending the service life of the filter layer 2. At the same time, the filter layer 2 and the shell 1 are detachably connected to facilitate the cleaning and maintenance of the filter layer 2.

[0031] like Figure 1 As shown, there are three types of filter layers 2 in this embodiment, and gaps are provided between adjacent filter layers 2 .

[0032] In this embodiment, a gap is provided between adjacent filter layers 2 to provide a buffer for the downstream filter layer 2 , thereby preventing the downstream filter layer 2 from being damaged by an excessively fast flow rate.

[0033] In other embodiments, if more or fewer types of impurities need to be filtered, three filter layers may not be provided, and 2, 4 or more filter layers may be adaptively provided to further improve the filtering efficiency.

[0034] like Figure 1 As shown, the gaps between adjacent filter layers 2 in this embodiment are of the same size; the plane where each filter layer 2 is located is perpendicular to the gas flow direction P1 in the filter.

[0035] In this embodiment, the gaps between the filter layers 2 are of the same size. When the gaps are of the same size, the structure is simple and easy to disassemble, which is beneficial to the cleaning and maintenance of the filter layer. At the same time, the plane where the filter layer 2 is located is perpendicular to the gas flow direction P1 in the filter, which is beneficial for the gas to enter the filter layer 2 evenly, thereby improving the filtration efficiency.

[0036] In other alternative embodiments, if a special filter layer 2 is used, which has a higher filtering efficiency when its plane is not perpendicular to the gas flow direction P1, a filter layer 2 whose plane is not perpendicular to the gas flow direction P1 can be provided.

[0037] In other alternative embodiments, if buffering is not required to further save space, gaps of different sizes may be set according to the air pressure in each gap during operation, or no gap may be set.

[0038] like Figure 1 As shown, the filter layer 2 in this embodiment includes a dust filter layer 21 and a liquid filter layer 22 . The dust filter layer 21 and the liquid filter layer 22 are arranged inside the housing 1 , and the liquid filter layer 22 is arranged downstream of the dust filter layer 21 .

[0039] In this embodiment, a dust filter layer 21 is arranged in the shell 1, and a liquid filter layer 22 is arranged downstream of the dust filter layer 21. The filtering is performed in two stages, first filtering the dust and then filtering the liquid, so as to avoid dust clogging the liquid filter layer 22, thereby improving the life and filtering efficiency of the liquid filter layer 22.

[0040] like Figure 1 As shown, the filter in this embodiment further includes a non-condensable gas filter layer 23 , which is disposed inside the housing 1 and downstream of the liquid filter layer 22 .

[0041] In this embodiment, a non-condensable gas filter layer 23 is arranged in the shell 1 to further filter the non-condensable gas, prevent the non-condensable gas from reacting with the liquid to form solid particles that damage the subsequent equipment, and improve the filtering effect. At the same time, a non-condensable gas filter layer 23 is arranged downstream of the liquid filter layer 22 to avoid dust and oily liquid from clogging the non-condensable gas filter layer 23, thereby improving the filtering efficiency and life of the non-condensable gas filter layer 23.

[0042] like Figure 1 As shown, the dust filter layer 21 in this embodiment includes a filter cloth and a bracket, the surface of the bracket is provided with mesh holes, and the filter cloth covers the surface of the bracket; the liquid filter layer 22 uses a porous material as a filter element; the non-condensable gas filter layer 23 uses a microporous material as a filter element.

[0043] In this embodiment, a filter cloth is used to cover the surface of the bracket to form a dust filter layer 21, which has a simple structure and a good filtering effect. The mesh holes on the surface of the bracket not only improve the strength of the bracket, but also increase the speed at which the liquid passes through the bracket, thereby improving the filtering efficiency.

[0044] The filter cloth in this embodiment is made of polyester or PP, the liquid adsorption layer is made of porous resin, such as polystyrene porous resin and polypropylene porous resin, and the non-condensable gas adsorption layer is made of activated carbon, zeolite, and macroporous resin.

[0045] The liquid filter layer 22 and the non-condensable gas filter layer 23 in this embodiment are made of materials capable of adsorption and desorption.

[0046] In this embodiment, the liquid filter layer 22 and the non-condensable gas filter layer 23 are made of materials capable of adsorption and desorption, which can be periodically disassembled and desorbed under high temperature conditions, can be repeatedly recycled and are easy to maintain.

[0047] like Figure 1 As shown, the shell 1 in this embodiment includes an air inlet portion 11, an exhaust portion 12 and a cylindrical portion 13. The cylindrical portion 13 accommodates the filter layer 2. The air inlet portion 11, the cylindrical portion 13 and the exhaust portion 12 are connected to form a gas channel. The diameter of the cylindrical portion 13 is larger than the diameter of the inlet end of the air inlet portion 11 and the outlet end of the exhaust portion 12.

[0048] In this embodiment, the shell 1 is composed of an air intake portion 11, an exhaust portion 12, and a cylindrical portion 13. The diameter of the cylindrical portion 13 is larger than the inlet end of the air intake portion 11 and the outlet end of the exhaust portion 12, which is beneficial to the connection between the air intake portion 11 and the front end pipeline and the outlet end of the exhaust portion 12 and the rear end pipeline. The cylindrical portion 13 has a larger diameter. When the gas flows into the cylindrical portion 13, the flow velocity of the gas will be reduced, thereby protecting the filter layer 2. At the same time, the larger diameter of the cylindrical portion increases the area of ​​the filter layer, so that more gas can be filtered at the same time, thereby improving the filtration efficiency.

[0049] like Figure 1 As shown, the air intake portion 11 and the exhaust portion 12 in this embodiment are connected to the cylindrical portion 13 through flange buckles; gaskets are provided at the connection between the air intake portion 11 and the exhaust portion 12 and the cylindrical portion 13, wherein the gaskets are polytetrafluoroethylene gaskets.

[0050] In this embodiment, the air intake part 11 and the exhaust part 12 are connected to the cylindrical part 13 by flange buckles, which are easy to disassemble and clean and are firmly connected. Gaskets are arranged at the connection between the air intake part 11 and the exhaust part 12 and the cylindrical part 13 to improve the sealing. The use of this solution improves the stability of the filter.

[0051] In other alternative embodiments, the connection between the air intake portion 11 and the exhaust portion 12 and the cylindrical portion 13 may be achieved without using flange buckles. For example, flange heads may be directly provided at the connection between the air intake portion 11 and the exhaust portion 12 and the cylindrical portion 13 to directly perform flange connection, as long as the air intake portion 11 and the exhaust portion 12 and the cylindrical portion 13 can be directly and sealedly connected.

[0052] like Figure 1 As shown, a gap is provided between the filter layer 2 and the end of the cylindrical portion 13 in this embodiment, and the gap between the filter layer 2 and the end of the cylindrical portion 13 is larger than the gap between adjacent filter layers 2 .

[0053] In this embodiment, a gap is provided between the filter layer 2 and the end of the cylindrical portion 13 to play a buffering role. The gap between the filter layer 2 and the end of the cylindrical portion 13 is larger than the gap between adjacent filter layers 2, which is beneficial for providing more gas buffer space when the flow rate at the inlet and outlet of the filter is fast, thereby protecting the filter layer and extending the life of the filter layer.

[0054] This embodiment also provides a vacuum pump assembly, which includes a vacuum pump and a filter, wherein the outlet of the filter is connected to the air inlet of the vacuum pump.

[0055] In this embodiment, the outlet of the filter is connected to the air inlet of the vacuum pump, which prevents dust from entering the vacuum pump, protects the vacuum pump, reduces the maintenance and repair frequency of the vacuum pump, and thus improves the working efficiency of the vacuum pump.

[0056] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A filter for a vacuum pump, characterized in that: The filter comprises a housing and at least two different filter layers, wherein the at least two different filter layers are sequentially arranged inside the housing so that the gas passes through the at least two different filter layers in sequence, and the filter layers and the housing are detachably connected; The filter layer comprises a dust filter layer and a liquid filter layer, the dust filter layer and the liquid filter layer are arranged inside the housing, and the liquid filter layer is arranged downstream of the dust filter layer; The filter further comprises a non-condensable gas filter layer, the non-condensable gas filter layer is arranged inside the housing, and the non-condensable gas filter layer is arranged downstream of the liquid filter layer; The housing comprises an air inlet, an exhaust part and a cylindrical part, the cylindrical part accommodates the filter layer, the air inlet, the cylindrical part and the exhaust part are connected to form a gas passage, and the diameter of the cylindrical part is larger than the diameter of the inlet end of the air inlet and the outlet end of the exhaust; The air inlet portion and the exhaust portion are connected to the cylindrical portion through flange buckles.

2. The filter according to claim 1, characterized in that There are three types of filter layers, and gaps are provided between adjacent filter layers.

3. The filter according to claim 2, characterized in that The gaps between adjacent filter layers are of the same size; And / or, the plane where each filter layer is located is perpendicular to the flow direction of the gas in the filter.

4. The filter according to claim 1, characterized in that The dust filter layer comprises a filter cloth and a bracket, the surface of the bracket is provided with mesh holes, and the filter cloth covers the surface of the bracket; And / or, the liquid filter layer uses a porous material as a filter element; And / or, the non-condensable gas filter layer uses a microporous material as a filter element.

5. The filter according to claim 1, characterized in that Gaskets are provided at the connection between the air intake portion, the exhaust portion and the cylindrical portion.

6. The filter according to claim 1, characterized in that A gap is provided between the filter layer and the end of the cylindrical portion, and the gap between the filter layer and the end of the cylindrical portion is larger than a gap between adjacent filter layers.

7. A vacuum pump assembly, characterized in that: The vacuum pump assembly comprises a vacuum pump and a filter as claimed in any one of claims 1 to 6, wherein an outlet of the filter is connected to an air inlet of the vacuum pump.

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