Compressed air filter easy to disassemble and replace

Abstract

The utility model discloses a compressed air filter easy to disassemble and replace, and belongs to the technical field of filters. Comprising a filter body which is detachably mounted in an air inlet of an external electromagnetic valve or mounted on a quick connector matched with the electromagnetic valve; the filter body comprises a support matched with the size of the air inlet of the electromagnetic valve, and the support abuts against the valve port wall of the air inlet of the electromagnetic valve through a quick connector. The filtering part is connected with the support, the filtering part is provided with a static intercepting structure or a dynamic separating structure and used for intercepting impurities in the compressed air, and the compressed air flows through the filtering part and then enters a valve cavity of the electromagnetic valve. The filter body can be installed in the air inlet of the electromagnetic valve in a matched mode, compared with the mode that a filter connector is adopted for filtering, the cost is reduced, a specific static intercepting structure or a specific dynamic separating structure is adopted for the filtering part, the good filtering effect is guaranteed, meanwhile, airflow cannot be remarkably limited, and the filtering effect is good. And efficient operation of the electromagnetic valve is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of filter technology, specifically relating to an easily replaceable compressed air filter. Background Technology

[0002] As a core control component in industrial automation, the performance stability of solenoid valves directly affects the reliability of pneumatic systems. During operation, if solid particles in the compressed air (such as dust, oil, and metal shavings) enter the valve chamber, it will cause problems such as valve core wear, seal failure, and response delay, potentially leading to equipment shutdown. Therefore, air intake filtration is a crucial step in ensuring the long-term operation of solenoid valves.

[0003] For air intake filtration of solenoid valves, conventional filters cannot be installed due to the small size of the air intake. Currently, filter connectors are generally used for filtration. However, filter connectors need to be purchased separately and are expensive, increasing costs. In addition, the filter screens provided are too dense, which will restrict the airflow into the solenoid valve and affect the response speed of the solenoid valve. Utility Model Content

[0004] This invention addresses the aforementioned problems in the existing technology by proposing a compressed air filter that improves filtration efficiency and is easy to replace.

[0005] This utility model can be achieved through the following technical solutions:

[0006] An easily replaceable compressed air filter includes:

[0007] The filter body is detachably installed in the external solenoid valve inlet or on a quick-connect fitting that mates with the solenoid valve.

[0008] The filter body includes:

[0009] A bracket, which is adapted to the size of the solenoid valve inlet, is pressed against the valve port wall of the solenoid valve inlet via a quick-connect fitting.

[0010] A filter section is connected to the bracket. The filter section has a static interception structure or a dynamic separation structure and is used to trap impurities in the compressed air. After the compressed air flows through the filter section, it enters the valve chamber of the solenoid valve.

[0011] As a further improvement of this utility model, the filter body is configured as a fan-type filter, the bracket is configured as a housing, the filter part is configured as a fan assembly, and the fan assembly is rotatably disposed within the housing.

[0012] As a further improvement of this utility model, the fan blade assembly includes a mounting shaft and a plurality of fan blades arranged on the circumferential surface of the mounting shaft, and a plurality of positioning protrusions are provided on the inner wall of the mounting shaft along its axial direction.

[0013] As a further improvement of this utility model, the fan blade assembly also includes a rotating shaft, and the circumferential surface of the rotating shaft is provided with a plurality of positioning grooves along its axial direction. The rotating shaft is inserted into the mounting shaft and the positioning protrusion is embedded in the positioning groove.

[0014] As a further improvement of this utility model, mounting holes are provided on the upper and lower end faces of the outer shell, the line connecting the two mounting holes is located in the direction of the central axis of the outer shell, the two ends of the rotating shaft are respectively inserted into the two mounting holes, and a bearing is provided between the rotating shaft and the mounting hole.

[0015] As a further improvement of this utility model, the upper and lower end faces of the outer shell are respectively provided with a number of ventilation holes.

[0016] As a further improvement of this utility model, the filter body is configured as a flexible mesh filter, the support is configured as an outer edge structure, and the filter part is configured as a flexible mesh with densely distributed holes.

[0017] As a further improvement of this utility model, the outer edge structure is set as a non-closed annular structure with a constriction, and the diameter of the outer edge structure is adjusted by the constriction.

[0018] As a further improvement of this utility model, the filter body is configured as a filter sheet, in which case the outer edge of the filter sheet forms the support, and the densely distributed mesh on the filter sheet forms the filter section.

[0019] As a further improvement of this utility model, the outer shell and the filter sheet are made of PE material.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Fan-type filter: The vent on the housing performs primary filtration of compressed air. The powerful airflow generated by the compressed air causes the fan assembly to rotate at high speed. Impurities mixed in the compressed air are thrown onto the inner wall of the housing under the action of centrifugal force, achieving secondary filtration of the compressed air. The filtration effect is improved through dual filtration. At the same time, due to the large diameter of the vent, sufficient airflow is ensured to enter the solenoid valve chamber, ensuring that the solenoid valve can operate efficiently.

[0022] 2. Flexible mesh filter: The flexible mesh deforms under the action of airflow, expanding the flow area and thus increasing the airflow. At the same time, the flexible mesh filter has an adjustable outer diameter through the tapering design of the outer edge structure, which improves its adaptability.

[0023] 3. Filter media: Filter media have a simple structure, are easy to install and disassemble, and are low in cost. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the fan-shaped filter of Embodiment 1 of this utility model after it is installed inside the air inlet of the solenoid valve.

[0025] Figure 2 This is a schematic diagram of the structure of a fan-shaped filter according to Embodiment 1 of this utility model;

[0026] Figure 3 This is a cross-sectional view of the fan-shaped filter according to Embodiment 1 of this utility model;

[0027] Figure 4 This is a schematic diagram of the fan blade assembly according to Embodiment 1 of this utility model;

[0028] Figure 5 This is a cross-sectional view of the flexible mesh filter of Embodiment 2 of this utility model after it is installed inside the air inlet of the solenoid valve;

[0029] Figure 6 This is a schematic diagram of the structure of the flexible mesh filter according to Embodiment 2 of this utility model;

[0030] Figure 7 This is a schematic diagram of the outer edge structure of the flexible mesh filter according to Embodiment 2 of this utility model.

[0031] In the diagram, 100 is the solenoid valve; 110 is the air inlet.

[0032] 200. Fan-type filter; 210. Housing; 211. Vent hole; 220. Mounting shaft; 221. Positioning protrusion; 230. Fan blade; 240. Rotating shaft; 241. Positioning groove; 242. Bearing;

[0033] 300. Flexible mesh filter; 310. Outer edge structure; 311. Closure; 320. Flexible mesh;

[0034] 400. Filter sheet. Detailed Implementation

[0035] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. The technical methods of the present invention will be further described, but the present invention is not limited to these embodiments.

[0036] Example 1

[0037] like Figures 1-4 As shown, Embodiment 1 provides an easily replaceable compressed air filter, comprising:

[0038] The filter body is detachably installed in the air inlet 110 of the external solenoid valve 100 or on a quick-connect fitting that mates with the solenoid valve 100.

[0039] The filter body includes:

[0040] The bracket is adapted to the size of the air inlet 110 of the solenoid valve 100. The bracket is pressed against the valve port wall of the air inlet 110 of the solenoid valve 100 through a quick-connect fitting to ensure stability after installation.

[0041] The filter section, which is connected to the bracket, has a dynamic separation structure and is used to trap impurities in the compressed air. After the compressed air flows through the filter section, it enters the valve chamber of the solenoid valve 100, ensuring the quality of the air entering the valve chamber of the solenoid valve 100, thereby extending the service life of the solenoid valve 100 and improving the system reliability.

[0042] It should be noted that the filter connector currently used for the air intake filtration of the solenoid valve 100's air inlet 110 has two problems: firstly, it needs to be purchased independently and is costly; secondly, the filter screen is too dense, which restricts the air flow into the solenoid valve 100 and affects the response speed of the solenoid valve 100.

[0043] To address the aforementioned issues, Embodiment 1 provides a filter body that can be installed in the air inlet 110 of the solenoid valve 100. Compared to the existing technology that uses filter connectors for filtration, this not only reduces costs but also employs a specific static interception structure or dynamic separation structure in the filter section. This ensures good filtration performance without significantly restricting airflow, thus guaranteeing the efficient operation of the solenoid valve 100.

[0044] Specifically, the description of the filter body is as follows:

[0045] Preferably, the filter body is configured as a fan-type filter 200, the support is configured as a housing 210, and the filter part is configured as a fan assembly, which is rotatably disposed within the housing 210.

[0046] The upper and lower end faces of the outer casing 210 are respectively provided with a number of vent holes 211. After the compressed air is output from the quick-connect connector, it flows through the fan-type filter 200 through each vent hole 211 and enters the valve chamber of the solenoid valve 100. In this process, the vent holes 211 perform primary filtration of the compressed air. The strong airflow generated by the compressed air causes the fan assembly to rotate at high speed. Impurities mixed in the compressed air can be thrown onto the inner peripheral wall of the outer casing 210 under the action of centrifugal force, thereby achieving secondary filtration of the compressed air. The filtration effect is improved through dual filtration.

[0047] It is worth mentioning that the centrifugal force generated by the high-speed rotation of the fan blade assembly throws impurities onto the inner peripheral wall of the housing 210. The vent 211 is located on the upper and lower end faces of the housing 210, which can effectively prevent the upper and lower end faces of the housing 210 from becoming blocked under long-term use and extend the service life of the filter.

[0048] In addition, since the vent hole 211 has a large aperture, it does not significantly restrict airflow compared to the filter screen of the filter connector used in the prior art. Therefore, it also ensures that the airflow entering the valve chamber of the solenoid valve 100 is sufficient, ensuring that the solenoid valve 100 can operate efficiently.

[0049] In summary, this fan-type filter 200 achieves good filtration effect while ensuring airflow and reducing costs, and has good application prospects.

[0050] To further optimize the design of the fan-type filter 200, the fan assembly has been meticulously designed and improved. The following is a detailed description:

[0051] 1. Fan blade assembly structure

[0052] Mounting shaft 220 and blades 230: The blade assembly includes a mounting shaft 220 on which a plurality of blades 230 are arranged on the circumferential surface. These blades 230 are used to rotate when airflow passes through and to separate impurities using centrifugal force.

[0053] Positioning protrusions 221: Several positioning protrusions 221 are provided on the inner wall of the mounting shaft 220 along its axial direction. The function of these positioning protrusions 221 is to ensure that the rotating shaft 240 can be accurately and securely inserted into the mounting shaft 220.

[0054] 2. Rotating shaft 240 design

[0055] Positioning grooves 241: The circumferential surface of the rotating shaft 240 is provided with several positioning grooves 241 along its axial direction. When the rotating shaft 240 is inserted into the mounting shaft 220, the positioning protrusions 221 inside the mounting shaft 220 will be embedded in the positioning grooves 241 of the rotating shaft 240. This design not only ensures the precise alignment between the rotating shaft 240 and the mounting shaft 220, but also enhances the stability of the entire fan blade assembly.

[0056] 3. Outer casing 210 and mounting holes

[0057] Mounting holes on housing 210: There is a mounting hole on the upper and lower end faces of housing 210 respectively. The line connecting the two mounting holes is located in the direction of the central axis of housing 210. The two ends of rotating shaft 240 are respectively inserted into the two mounting holes.

[0058] 4. Application of bearing 242: In order to reduce the frictional resistance of the rotating shaft 240 when it rotates at high speed and improve the rotation efficiency, a bearing 242 is set between the rotating shaft 240 and the mounting hole. This not only helps to extend the service life of the rotating shaft 240 and the mounting hole, but also ensures that the fan blade assembly can rotate smoothly at high speed.

[0059] The design of the positioning protrusion 221 and the positioning groove 241 achieves high-precision alignment between the rotating shaft 240 and the mounting shaft 220, ensuring the smoothness and reliability of the fan blade assembly. This precise and stable connection method improves the stability of the entire fan blade assembly, enabling the fan blade assembly to maintain a good working condition even under high-speed rotation.

[0060] In addition, the outer shell 210 can be made of PE material (or other materials with filtration properties), so that the entire outer shell 210 itself has a certain filtration effect.

[0061] To improve the versatility of the vane filter 200, the housing 210 can also be made of a foldable material, so that the height of the entire vane filter 200 can be adjusted to accommodate solenoid valves 100 with different inlet thread heights 110.

[0062] Example 2

[0063] like Figures 5-7 As shown, the difference between Embodiment 2 and Embodiment 1 is that Embodiment 2 provides a filter body with a different structure, which is set as a flexible mesh filter 300. In this case, the support is set as an outer edge structure 310, and the filter part is set as a flexible mesh 320 with dense mesh holes. The flexible mesh filter 300 achieves the filtering effect of compressed air through a static interception structure.

[0064] It is worth mentioning that the outer edge structure 310 is made of a relatively rigid material to support the flexible mesh 320 and prevent it from being blown into the solenoid valve 100 under air pressure. The flexible mesh 320 is made of a material with a certain degree of flexibility, which can produce a certain amount of deformation under external force. Therefore, compared with ordinary filter screens, the flexible mesh 320 effectively increases the area of ​​the entire filter through deformation during the process of compressed air intake, thereby increasing the airflow and reducing the flow restriction effect. At the same time, it plays a role in intercepting impurities in the compressed air and achieving the purpose of filtration.

[0065] Preferably, the outer edge structure 310 is configured as a non-closed annular structure with a constriction 311, and the diameter of the outer edge structure 310 is adjusted by the constriction 311, thereby improving the adaptability of the flexible filter. When in use, the outer diameter of the outer edge structure 310 can be adjusted according to the installation diameter of the air inlet 110 of the solenoid valve 100.

[0066] In summary, the flexible mesh filter 300 provided in Embodiment 2 has an adjustable outer diameter and strong adaptability. Furthermore, the flexible mesh 320 expands the flow cross-section through deformation generated during air circulation, thereby increasing the flow rate while maintaining the filtration effect.

[0067] Example 3

[0068] Preferably, the filter body is configured as a filter element 400 (not shown in the figure), the filter element 400 is made of PE material, the outer edge of the filter element 400 forms a support, and the dense mesh on the filter element 400 forms a filter section.

[0069] The filter 400 has a simple structure, is easy to install and disassemble, and is inexpensive.

[0070] In addition, the filter bodies provided in Embodiments 1, 2, and 3 of this application can be installed in other locations where filters need to be installed, besides being used in solenoid valves.

[0071] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of any combination of the above technical features. The above are specific embodiments 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 are also considered within the scope of protection of this utility model.

[0072] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0073] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0074] The technical solutions of the various embodiments of this utility model can be combined with each other, but only if they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

[0075] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An easily replaceable compressed air filter, characterized in that, include: The filter body is detachably installed in the external solenoid valve inlet or on a quick-connect fitting that mates with the solenoid valve. The filter body includes: A bracket, which is adapted to the size of the solenoid valve inlet, is pressed against the valve port wall of the solenoid valve inlet via a quick-connect fitting. A filter section is connected to the bracket. The filter section has a static interception structure or a dynamic separation structure and is used to trap impurities in the compressed air. After the compressed air flows through the filter section, it enters the valve chamber of the solenoid valve.

2. The easily replaceable compressed air filter according to claim 1, characterized in that, The filter body is configured as a fan-type filter, the bracket is configured as a housing, the filter part is configured as a fan assembly, and the fan assembly is rotatably disposed within the housing.

3. The easily replaceable compressed air filter according to claim 2, characterized in that, The fan blade assembly includes a mounting shaft and a plurality of fan blades arranged on the circumferential surface of the mounting shaft, and a plurality of positioning protrusions are provided on the inner wall of the mounting shaft along its axial direction.

4. The easily replaceable compressed air filter according to claim 3, characterized in that, The fan blade assembly also includes a rotating shaft, the circumferential surface of which is provided with a plurality of positioning grooves along its axial direction, the rotating shaft being inserted into the mounting shaft and the positioning protrusions being embedded in the positioning grooves.

5. The easily replaceable compressed air filter according to claim 4, characterized in that, Mounting holes are provided on the upper and lower end faces of the housing, and the line connecting the two mounting holes is located in the direction of the central axis of the housing. The two ends of the rotating shaft are respectively inserted into the two mounting holes, and a bearing is provided between the rotating shaft and the mounting hole.

6. The easily replaceable compressed air filter according to claim 2, characterized in that, The upper and lower end faces of the outer shell are also provided with several ventilation holes.

7. The easily replaceable compressed air filter according to claim 1, characterized in that, The filter body is configured as a flexible mesh filter, the support is configured as an outer edge structure, and the filter part is configured as a flexible mesh with densely packed holes.

8. The easily replaceable compressed air filter according to claim 7, characterized in that, The outer edge structure is configured as a non-closed ring structure with a constriction, and the diameter of the outer edge structure is adjusted by the constriction.

9. A replaceable compressed air filter according to claim 2, characterized in that, The filter body is configured as a filter element, and the outer edge of the filter element forms the support. The dense mesh on the filter element forms the filter section.

10. A replaceable compressed air filter according to claim 9, characterized in that, The outer shell and the filter are made of PE material.

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