Filtering mechanism and roots vacuum pump

Abstract

The utility model discloses a filtering mechanism and a roots vacuum pump, the filtering mechanism comprises a first mounting plate and a second mounting plate, the first mounting plate is detachably fixed with a pump body; the second mounting plate and the first mounting plate are fixed, a multi-stage filtering cavity which is sequentially connected is defined in the length direction, and the multi-stage filtering cavity is divided into at least four filtering areas which are communicated into the pump body. According to the utility model, the occupied space can be reduced on the premise of shortening the filtering distance, the installation is more convenient, and the filtering efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump technology, specifically to a filtration mechanism and a Roots vacuum pump. Background Technology

[0002] Roots vacuum pumps are widely used in processes such as gas extraction and transportation, and are an essential gas transmission device. During the extraction process, the air usually needs to be filtered before being delivered to the rotor cavity to avoid problems such as blockage caused by impurities in the air. In related technologies, the existing Roots vacuum pumps use a filtration method that occupies a large space, is inconvenient to install, and has a long filtration distance, resulting in low filtration efficiency. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in related technologies. Therefore, one objective of this utility model is to provide a filtration mechanism comprising:

[0004] A first mounting plate, which is detachably fixed to the pump body;

[0005] The second mounting plate is fixed to the first mounting plate and defines a multi-stage filter chamber connected in sequence along the length direction. The multi-stage filter chamber is divided into at least four filter zones and is connected to the pump body.

[0006] Preferably, the first mounting plate is provided with partitions, which are spaced apart along the length of the first mounting plate to form at least four filter zones.

[0007] Preferably, the length of the partition is less than the length of the first mounting plate but greater than half the length of the first mounting plate.

[0008] Preferably, at least four of the filter zones are provided with filter elements, which are used to filter the air entering the multi-stage filter chamber sequentially.

[0009] Preferably, the first mounting plate is provided with a gas outlet, the second mounting plate is provided with a gas inlet, and the gas outlet and the gas inlet are interconnected through the multi-stage filtration chamber.

[0010] Preferably, the gas outlet and the gas inlet are located at opposite diagonal points that are misaligned with each other.

[0011] Preferably, the gas inlet is provided with an embedding groove, which is arranged around the gas inlet.

[0012] Preferably, the first mounting plate is further provided with a first air outlet, and the second mounting plate is provided with a second air outlet, wherein the first air outlet and the second air outlet are coaxial and stacked on top of each other.

[0013] Another objective of this invention is to provide a Roots vacuum pump, including the filtration mechanism described above.

[0014] The above-described solution of this utility model has at least the following beneficial effects:

[0015] The filtration mechanism provided by this utility model defines a multi-stage filtration chamber connected in sequence along the length direction by a first mounting plate and a second mounting plate. By dividing the multi-stage filtration chamber into at least four filtration zones, the multi-stage filtration chamber can reduce the space occupied while shortening the filtration distance, making installation more convenient and improving filtration efficiency.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the filtration mechanism provided in the embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the first mounting plate and the second mounting plate provided in the embodiments of this utility model;

[0020] Figure 3 This is an exploded view of the structure of the first mounting plate and the second mounting plate provided in the embodiments of this utility model;

[0021] Explanation of icon numbers:

[0022] 10. First mounting plate; 101. Separator; 102. Gas outlet; 103. First gas outlet; 20. Second mounting plate; 201. Gas inlet; 202. Embedded groove; 203. Second gas outlet; 30. Pump body; 40. Multi-stage filter chamber; 401. Filtering zone.

[0023] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The filtration mechanism and Roots vacuum pump of this utility model embodiment are described in detail below with reference to the accompanying drawings.

[0030] Reference Figures 1 to 3 As shown, the filtration mechanism provided by this utility model includes: a first mounting plate 10 and a second mounting plate 20. The first mounting plate 10 is detachably fixed to the pump body 30. The second mounting plate 20 is fixed to the first mounting plate 10 and defines a multi-stage filtration chamber 40 connected in sequence along the length direction. The multi-stage filtration chamber 40 is divided into at least four filtration zones 401 and is connected to the pump body 30.

[0031] The filtration mechanism provided by this utility model defines a multi-stage filtration chamber 40 connected in sequence along the length direction by the first mounting plate 10 and the second mounting plate 20. By dividing the multi-stage filtration chamber 40 into at least four filtration zones 401, the multi-stage filtration chamber 40 can reduce the space occupied by the multi-stage filtration chamber 40 while shortening the filtration distance, making installation more convenient and improving filtration efficiency.

[0032] Specifically, the first mounting plate 10 is provided with a partition 101, which is arranged at intervals along the length of the first mounting plate 10 to form at least four filter zones 401; furthermore, the length of the partition 101 is less than the length of the first mounting plate 10 but greater than half the length of the first mounting plate 10.

[0033] In this embodiment, the second mounting plate 20 may be provided with a partition strip or a locking groove corresponding to the partition 101, so that after the first mounting plate 10 and the second mounting plate 20 are fixed to each other, they are separated by the partition 101 to form a filter zone 401, so that the gas can enter each filter zone 401 in sequence through the inlet to complete the filtration. This not only forms a multi-stage filtration, but also reduces the overall space occupied and shortens the filtration distance.

[0034] In a preferred embodiment, at least four of the filtration zones 401 are equipped with filter elements, which are used to sequentially filter the air entering the multi-stage filtration chamber 40. The filter elements can be made of various different filter materials, or they can be made of the same filter material, such as stainless steel filter elements.

[0035] Specifically, the first mounting plate 10 is provided with a gas outlet 102, and the second mounting plate 20 is provided with a gas inlet 201. The gas outlet 102 and the gas inlet 201 are interconnected through a multi-stage filtration chamber 40. Furthermore, the gas outlet 102 and the gas inlet 201 are located at opposite diagonal points that are misaligned with each other.

[0036] In this embodiment, when the pump body 30 is pumping air, the gas can enter the multi-stage filter chamber 40 from the gas inlet 201. After being filtered in the multi-stage filter chamber 40, the gas enters the rotor chamber of the pump body 30 through the gas outlet 102. This avoids the air entering the rotor chamber carrying impurities from affecting the rotor chamber, thus improving the overall service life. It can be understood that by setting the gas outlet 102 and the gas inlet 201 in a staggered manner, the air entering from the gas inlet 201 can form a certain filtration distance, and the overall installation space is more reasonable.

[0037] Furthermore, the gas inlet 201 is provided with an embedding groove 202, which surrounds the gas inlet 201. When the gas inlet 201 is connected to the pipeline, the embedding groove 202 can fit into the sealing ring, making the connection between the gas inlet 201 and the pipeline tighter and the sealing performance better.

[0038] Optionally, the first mounting plate 10 is further provided with a first air outlet 103, and the second mounting plate 20 is provided with a second air outlet 203. The first air outlet 103 and the second air outlet 203 are coaxial and stacked on top of each other. When gas enters the rotor cavity for outward transport, it can be discharged outward through the first air outlet 103 and the second air outlet 203. This reduces the number of installation positions required for gas input and output, thereby reducing the space occupied.

[0039] The Roots vacuum pump proposed in the embodiments of this utility model includes the filtration mechanism described above. The Roots vacuum pump uses this filtration mechanism for filtration, thereby defining a multi-stage filtration chamber 40 connected sequentially along its length by the first mounting plate 10 and the second mounting plate 20. By dividing the multi-stage filtration chamber 40 into at least four filtration zones 401, the multi-stage filtration chamber 40 can reduce its space occupation while shortening the filtration distance, making installation more convenient and improving filtration efficiency.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0041] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A filtration mechanism, characterized in that, include: A first mounting plate, which is detachably fixed to the pump body; The second mounting plate is fixed to the first mounting plate and defines a multi-stage filter chamber connected in sequence along the length direction. The multi-stage filter chamber is divided into at least four filter zones and is connected to the pump body.

2. The filtration mechanism according to claim 1, characterized in that, The first mounting plate is provided with partitions, which are spaced apart along the length of the first mounting plate to form at least four filter zones.

3. The filtration mechanism according to claim 2, characterized in that, The length of the partition is less than the length of the first mounting plate but greater than half the length of the first mounting plate.

4. The filtration mechanism according to claim 1, characterized in that, Each of the at least four filtration zones is provided with a filter element, which is used to filter the air entering the multi-stage filtration chamber sequentially.

5. The filtration mechanism according to claim 1, characterized in that, The first mounting plate is provided with a gas outlet, and the second mounting plate is provided with a gas inlet. The gas outlet and the gas inlet are interconnected through the multi-stage filtration chamber.

6. The filtration mechanism according to claim 5, characterized in that, The gas outlet and the gas inlet are located at opposite diagonal points that are misaligned with each other.

7. The filtration mechanism according to claim 5, characterized in that, The gas inlet is provided with an embedding groove, which is arranged around the gas inlet.

8. The filtration mechanism according to claim 1, characterized in that, The first mounting plate is also provided with a first air outlet, and the second mounting plate is provided with a second air outlet. The first air outlet and the second air outlet are coaxial and stacked on top of each other.

9. A Roots vacuum pump, characterized in that, Includes the filtration mechanism as described in any one of claims 1 to 8.

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