A high-precision filter device

Abstract

This invention discloses a high-precision filter device, comprising a housing, a top cover, a filter screen component, and a connector structure. The filter screen component is a hollow cylindrical structure vertically arranged in the accommodating cavity of the housing, forming a closed hollow filter chamber. The connector structure is sealed between the air outlet and the filter screen component, and has an internal ventilation pipe connecting the air outlet and the hollow filter chamber. The gas medium input from the air inlet is filtered by the filter screen component and enters the hollow filter chamber, then undergoes secondary filtration by the filter screen component before entering the ventilation pipe, and finally exits from the air outlet. This ensures that the gas medium can only flow into the connector structure after being filtered by the filter screen component. This filter device has a simple structure, is easy to install and maintain, and helps to increase the contact area between the filter screen component and the gas medium, resulting in high filtration accuracy and improved product performance.

Description

Technical Field

[0001] This invention relates to the field of filter technology, and more specifically to a high-precision filter device. Background Technology

[0002] Filters are an indispensable device in pipelines transporting media. Installed at the inlet of pressure reducing valves, relief valves, and other equipment, they remove impurities from the media, protecting valves and equipment and reducing maintenance costs. Existing filters are commonly used in gas equipment, primarily to filter out small amounts of impurities carried during long-distance gas transportation, thereby ensuring stable operation of natural gas equipment and reducing the failure rate and maintenance frequency of various devices.

[0003] For example, Chinese patent document CN212383380U discloses a filter device, including a housing with an inner cavity, a cover installed on the housing, and a filter layer structure. Two perforated mounting brackets are clamped on both sides of the filter layer structure. The filter layer structure is mainly composed of a filter screen. At least one set of slot structures are arranged opposite each other on the inner wall of the housing. The filter layer structure is inserted into the slot structures through the mounting brackets. The two sides of the mounting brackets abut against the slot walls of the slot structures, causing the two mounting brackets to clamp the filter layer structure with opposing forces. This filter layer structure and mounting brackets are arranged in either a V-shape or a flat plate structure. From the above structure, it can be seen that existing filters still have the following problems in actual use: the filter layer structure cannot reliably fit with the inner wall of the housing, and the contact distance is long, often resulting in gaps between them. This leads to poor installation sealing, causing gaseous media to pass through the gaps without being filtered, thus reducing the product's filtration accuracy and affecting its performance. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the filter layer of the filter and the inner wall of the housing in the prior art cannot be reliably fitted and often have gaps, which causes the product filtration accuracy to deteriorate and affects the product performance.

[0005] To address the aforementioned technical problems, this invention provides a high-precision filter device, comprising a housing, a top cover, and a receiving cavity disposed within the housing. The housing is provided with an air inlet and an air outlet connecting the receiving cavity. The device further includes:

[0006] The filter element is a cylindrical structure that is vertically arranged in the accommodating cavity. It surrounds and closes to form a hollow filter cavity through which the gas medium can pass. The two ends of the filter element are tightly connected to the shell and the top cover respectively through positioning structures.

[0007] The connector structure is sealed between the air outlet and the filter component, and has an air passage connecting the air outlet and the hollow filter cavity inside.

[0008] As a preferred embodiment, the extension direction of the connector structure is perpendicular to the extension direction of the filter element.

[0009] As a preferred embodiment, the connector structure includes a connecting pipe connected to the air outlet, a movable connector movably sleeved on the connecting pipe, and an elastic element disposed between the connecting pipe and the movable connector. The movable connector is tightly fitted and connected to the side wall of the filter component under the pressure of the spring element.

[0010] As a preferred embodiment, the vent pipe extends through the connecting pipe and the movable joint, with one end of the connecting pipe being fastened to the air outlet via a threaded structure, and the other end being slidably connected to the movable joint.

[0011] As a preferred embodiment, the elastic element is a compression spring structure sleeved on the connecting pipe. A positioning boss is provided on the side wall of the connecting pipe, and a positioning groove is provided on the connecting pipe opposite to the positioning boss. The two ends of the compression spring structure are respectively located in the positioning boss and the positioning groove.

[0012] As a preferred embodiment, at least one sealing ring is provided between the connecting pipe and the movable joint, and an annular groove suitable for accommodating the sealing ring is formed on the side wall of the other end of the connecting pipe.

[0013] As a preferred embodiment, the filter element and the hollow filter cavity are respectively cylindrical or prismatic, and the filter element is located at the center of the receiving cavity.

[0014] As a preferred embodiment, the filter component includes a hollow filter support and a filter body that is fitted onto the outside of the filter support. The filter support has several air vents, and the hollow filter cavity is disposed inside the filter support.

[0015] As a preferred embodiment, the movable connector includes two hooks disposed on its two side walls, and an installation contact surface disposed at one end of the movable connector and fitted onto the filter body, wherein the installation contact surface is an arc surface structure or a planar structure.

[0016] As a preferred embodiment, the positioning structure includes two annular positioning grooves respectively disposed opposite to the housing and the top cover, with the two ends of the filter support and the filter body respectively inserted into the two annular positioning grooves.

[0017] The technical solution of this invention has the following advantages compared with the prior art:

[0018] 1. In the high-precision filter device provided by this invention, the filter element is designed as a hollow cylindrical structure with a hollow filter cavity, which is beneficial to increasing the contact area between the filter element and the gas medium, thereby increasing the service life of the filter element. A joint structure is sealed between the air outlet of the housing and the filter element. The joint structure has a ventilation pipe connecting the air outlet and the hollow filter cavity. The advantage of this design is that the gas medium input from the air inlet enters the hollow filter cavity after being filtered by the filter element, and then enters the ventilation pipe after being filtered a second time by the filter element, and finally exits from the air outlet. Since only two ends of the filter element are tightly connected to the housing and the top cover, while the rest of the part is in full contact with the gas medium in the accommodating cavity, this ensures that the gas medium can only flow into the joint structure after being filtered by the filter element, thus ensuring the filtration effect of the product. The high-precision filter device using this technical solution optimizes its own structural layout, avoiding the use of traditional V-shaped or flat filter elements that are installed and connected to the inner wall of the housing. The structure is simple, which is beneficial to improving filtration accuracy, enhancing product performance and service life.

[0019] 2. In the high-precision filter device provided by the present invention, the connector structure includes a connecting pipe connected to the air outlet and a movable connector movably sleeved on the connecting pipe. An elastic element is provided on the connecting pipe to connect the movable connector, so that the movable connector is tightly fitted to the side wall of the filter screen component under the pressure of the elastic element. This realizes the installation connection between the movable connector and the filter screen component, with good installation stability. The hollow filter cavity of the filter screen component is connected to the air pipeline through the movable connector, thereby ensuring that the gas medium enters the hollow filter cavity after being filtered by the filter screen component, and is then discharged from the air outlet after being transmitted through the movable connector and the connecting pipe.

[0020] 3. In the high-precision filter device provided by the present invention, one end of the connecting pipe is threaded to the air outlet, and the other end is slidably connected to the movable joint. At least one sealing ring is provided between the connecting pipe and the movable joint. The sealing ring achieves a sealed connection between the connecting pipe and the movable joint, preventing unfiltered gas medium from seeping into the air passage from the gap between the connecting pipe and the movable joint. The sealing effect is good.

[0021] 4. In the high-precision filter device provided by the present invention, two hooks are provided on the two side walls of the movable joint. This hook design makes it convenient for the operator to pull the movable joint. Therefore, when the filter screen component needs to be replaced, the operator can simply pull the two hooks to move the movable joint away from the filter screen body, thus separating the filter screen body from the movable joint. At this time, the filter screen component can be replaced. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 A three-dimensional structural schematic diagram of the high-precision filter device provided by the present invention;

[0024] Figure 2 This is a cross-sectional structural diagram of the high-precision filter device of the present invention;

[0025] Figure 3 This is a top view of the high-precision filter device of the present invention with the top cover hidden;

[0026] Figure 4 This is a schematic diagram of the structure of the housing of the present invention;

[0027] Figure 5 This is a schematic diagram of the connection structure between the filter screen component and the connector structure of the present invention;

[0028] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Receiving cavity; 2. Top cover; 3. Filter screen component; 30. Hollow filter cavity; 31. Filter screen support; 32. Filter screen body; 4. Connector structure; 41. Connecting pipe; 42. Movable connector; 43. Elastic element; 44. Hook; 45. Positioning groove; 46. Mounting contact surface; 5. Ventilation pipe; 6. Air inlet; 7. Air outlet; 8. Sealing ring; 9. Annular positioning groove. Detailed Implementation

[0029] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] In the description of this invention, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; and they can be internal connections between two components.

[0032] Example

[0033] The following is a detailed description of this embodiment with reference to the accompanying drawings:

[0034] This embodiment provides, as follows: Figure 1-5 A high-precision filter device is shown, comprising a housing 1, a top cover 2, and a receiving cavity 11 disposed within the housing 1. The housing 1 is provided with an air inlet 6 and an air outlet 7 connecting the receiving cavity 11. The device also includes:

[0035] The filter element 3 is a cylindrical structure that is vertically arranged in the accommodating cavity 11. It surrounds and closes to form a hollow filter cavity 30 through which the gas medium can pass. The two ends of the filter element are tightly connected to the housing 1 and the upper cover 2 respectively through positioning structures.

[0036] The connector structure 4 is sealed between the air outlet 7 and the filter screen component 3, and has an air passage 5 that connects the air outlet 7 and the hollow filter cavity 30.

[0037] The above-described implementation method is the core technical solution of this embodiment. This filter element 3 is designed as a hollow cylindrical structure with a hollow filter cavity 30. A joint structure 4 is sealed between the air outlet 7 and the filter element 3. The advantage of this design is that the gas medium input from the air inlet 6 enters the hollow filter cavity 30 after being filtered by the filter element 3, and then enters the ventilation pipeline 5 after secondary filtration by the filter element 3. Finally, it is output from the air outlet 7. Since only two ends of the filter element 3 are tightly connected to the housing 1 and the top cover 2, while the rest of the part is in full contact with the gas medium in the accommodating cavity 11, this ensures that the gas medium can only flow into the joint structure after being filtered by the filter element 3, thus ensuring the filtration effect of the product. The filter device using this technical solution, through reasonable optimization of its own structural layout, is conducive to increasing the contact area between the filter element and the gas medium, avoiding the use of traditional V-shaped or flat filter screens that are installed and connected to the inner wall of the housing. The structure is simple, the installation is convenient, the filtration accuracy is improved, and the product performance is enhanced.

[0038] The following is combined with Figure 2-5 The specific arrangement of the joint structure is described in detail below:

[0039] The extension direction of the connector structure 4 is perpendicular to the extension direction of the filter screen component 3. Specifically, the connector structure 4 includes a connecting pipe 41 connected to the air outlet 7, a movable connector 42 movably sleeved on the connecting pipe 41, and an elastic element 43 disposed between the connecting pipe 41 and the movable connector 42. The movable connector 42 is tightly connected to the side wall of the filter screen component 3 under the pressure of the spring element. The ventilation pipe 5 extends through the connecting pipe 41 and the movable connector 42, thus realizing the installation connection between the movable connector 42 and the filter screen component 3. The installation stability is good. According to the gas medium, it can pass through the filter screen component 3 and enter the movable connector 42 from one side of the hollow filter cavity 30. The hollow filter cavity 30 of the filter screen component 3 is connected to the ventilation pipe 5 through the movable connector 42, thereby ensuring that the gas medium enters the hollow filter cavity 30 after being filtered by the filter screen component 3, and then is discharged from the air outlet 7 after being transmitted through the movable connector 42 and the connecting pipe 41. During this process, impurities in the gas medium are filtered out.

[0040] In a further preferred configuration, one end of the connecting pipe 41 is fastened to the air outlet 7 via a threaded structure, and the other end is slidably connected to the movable joint 42. The connecting pipe 41 extends a predetermined distance along the axial direction of the air outlet 7 and serves as a guide for the sliding of the movable joint 42. The elastic element 43 is a compression spring structure sleeved on the connecting pipe 41. The specific arrangement of this compression spring structure is as follows: a positioning groove 45 for connecting the compression spring structure is provided on the connecting pipe 41, one end of the compression spring structure abuts against the inner wall of the housing 1, and the other end abuts against the positioning groove 45, thereby achieving the positioning and installation of the compression spring structure; or the connecting pipe 41... A positioning boss is provided on the side wall opposite to the positioning groove 45. The two ends of the compression spring structure are respectively set in the positioning boss and the positioning groove 45, which can also realize the positioning and installation of the compression spring structure. The installation force is balanced. The direction of the elastic force of the compression spring structure is consistent with the movement direction of the movable joint, thereby ensuring that the movable joint 42 moves along the connecting pipe 41 under the action of the elastic force of the compression spring structure and tightly abuts against the filter screen component 3, so as to realize the reliable connection between the movable joint 42 and the filter screen component 3, improve the installation connection strength between the movable joint 42 and the filter screen component 3, and enable the movable joint to resist the impact of high-speed gas without causing any loosening. The installation stability is good.

[0041] like Figure 2As shown, one end of the connecting pipe 41 is connected to the air outlet 7 by a threaded connection to achieve a sealed installation, preventing unfiltered gas from flowing directly out of the air outlet 7. In addition, a sealing ring 8 is provided between the connecting pipe 41 and the movable joint 42. An annular groove suitable for accommodating the sealing ring 8 is formed on the side wall of the other end of the connecting pipe 41. The annular groove is used to position and install the sealing ring 8. The sealing ring 8 achieves a sealed connection between the connecting pipe 41 and the movable joint 42, preventing unfiltered gas from seeping into the ventilation pipe 5 through the gap between the connecting pipe 41 and the movable joint 42. This ensures the sealing connection effect at both ends of the connecting pipe 41, ensuring that the gas can only enter the passage between the movable joint 42 and the connecting pipe 41 after multiple filtrations by the filter screen component 3, thus preventing filter leakage.

[0042] Combination Figure 2-3 As shown, the movable connector 42 includes two hooks 44 on its two side walls and a mounting contact surface 46 located at one end of the movable connector 42 and mating against the filter screen component 3. The mounting contact surface 46 can be designed as an arc surface or a flat surface depending on the shape of the filter screen component 3. This hook 44 design facilitates the operator to pull the movable connector 42. Therefore, when the filter screen component 3 needs to be replaced, simply pulling on the two hooks will cause the movable connector 42 to overcome the spring force and move away from the filter screen body 32, thereby separating the filter screen body 32 from the movable connector 42, allowing the filter screen component to be replaced.

[0043] The following is combined with Figure 2-5 The specific structure of the filter component is described in detail below:

[0044] The filter element 3 and the hollow filter cavity 30 are respectively cylindrical or prismatic. The filter element 3 is positioned at the center of the receiving cavity, which is a circular cavity, so that the filter element and the receiving cavity are concentrically arranged. The filter element 3 designed in this way has no contact with the inner wall of the housing 1, and only its two ends are connected to the housing 1 and the top cover 2 for installation. This can effectively increase the contact area with the gas, and the structure is simple, easy to install, and has high filtration accuracy.

[0045] As a specific structural arrangement, the filter component 3 includes a hollow filter support 31 and a filter body 32 that is fitted onto the outside of the filter support 31. The filter support 31 has several air vents, and the hollow filter cavity 30 is disposed inside the filter support 31, allowing the gas medium to pass through the filter support 31 and the filter body 32 sequentially before entering the hollow filter cavity 30. In this embodiment, both the filter support 31 and the filter body 32 preferably adopt a hollow cylindrical structure design, and the filter support 31 provides installation support for the filter body 32. This filter body 32 is preferably made of multi-layer filter cotton, which is made of polyester fiber that is progressively denser, combed, and laid out with hot air. It has the characteristics of high dust holding capacity, low resistance, and strong flame retardancy, and can filter particulate dust larger than 1 micrometer and various suspended solids, with good filtration effect.

[0046] Combination Figure 2 and Figure 4 As shown, the positioning structure includes two annular positioning grooves 9 respectively disposed opposite to the housing 1 and the upper cover 2. The two ends of the filter screen bracket 31 and the filter screen body 32 are respectively inserted into the two annular positioning grooves 9. When the upper cover 2 is fixedly installed with the housing 1, the upper cover and the housing play a positioning and installation role for the two ends of the filter screen component 3 through the two annular positioning grooves 9, thereby realizing the installation and fixation of the filter screen component 3 in the accommodating cavity. The installation structure is simple. This installation can avoid the filter layer structure from shaking and tilting due to the impact of high pressure gas in the housing 1. The fixed fit is reliable, ensuring the filtration effect of the filter. The filter device provided in this embodiment has a simple structure and is easy to assemble and maintain.

[0047] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A high-precision filter device, comprising a housing (1), a top cover (2), and a receiving cavity (11) disposed within the housing (1), wherein the housing (1) is provided with an air inlet (6) and an air outlet (7) connecting the receiving cavity (11), characterized in that, Also includes: The filter element (3) is arranged vertically in the accommodating cavity (11) in a cylindrical structure. It surrounds and closes to form a hollow filter cavity (30) through which the gas medium can pass. The two ends of the filter element are tightly connected to the shell (1) and the top cover (2) respectively through positioning structures. The connector structure (4) is sealed between the air outlet (7) and the filter screen component (3), and has an air passage (5) that connects the air outlet (7) and the hollow filter cavity (30). The extension direction of the connector structure (4) is perpendicular to the extension direction of the filter screen component (3); The connector structure (4) includes a connecting pipe (41) connected to the air outlet (7), a movable connector (42) movably sleeved on the connecting pipe (41), and an elastic element (43) disposed between the connecting pipe (41) and the movable connector (42). The movable connector (42) is tightly attached to the side wall of the filter screen component (3) under the pressure of the spring element.

2. The high-precision filter device according to claim 1, characterized in that: The ventilation pipe (5) extends through the connecting pipe (41) and the movable joint (42). One end of the connecting pipe (41) is fastened to the air outlet (7) by a threaded structure, and the other end is slidably connected to the movable joint (42).

3. The high-precision filter device according to claim 2, characterized in that: The elastic element (43) is a compression spring structure sleeved on the connecting pipe (41). The connecting pipe (41) is provided with a positioning groove (45). One end of the compression spring structure abuts against the inner wall of the housing (1), and the other end abuts against the positioning groove (45).

4. The high-precision filter device according to claim 3, characterized in that: At least one sealing ring (8) is provided between the connecting pipe (41) and the movable joint (42), and an annular groove suitable for accommodating the sealing ring (8) is formed on the side wall of the other end of the connecting pipe (41).

5. A high-precision filter device according to any one of claims 1-4, characterized in that: The filter element (3) and the hollow filter cavity (30) are respectively cylindrical or prismatic, and the filter element (3) is located at the center of the accommodating cavity.

6. A high-precision filter device according to claim 5, characterized in that: The filter component (3) includes a hollow filter support (31) and a filter body (32) that is fitted on the outside of the filter support (31). The filter support (31) has several air holes, and the hollow filter cavity (30) is located inside the filter support (31).

7. A high-precision filter device according to claim 6, characterized in that: The movable connector (42) includes two hooks (44) on its two side walls and an installation contact surface (46) on one end of the movable connector (42) and fitted onto the filter body (32). The installation contact surface (46) is an arc surface structure or a planar structure.

8. A high-precision filter device according to claim 6, characterized in that: The positioning structure includes two annular positioning grooves (9) respectively disposed opposite to the housing (1) and the top cover (2), and the two ends of the filter support (31) and the filter body (32) are respectively inserted into the two annular positioning grooves (9).

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