Gas filter

Abstract

The utility model discloses a fuel gas filter, which belongs to the field of filters, and comprises a shell, a filter cavity, a gas inlet, a gas outlet, a gas outlet, a gas inlet pipe, a gas outlet pipe, a gas inlet pipe and a gas outlet pipe, the filter element is arranged in the filter cavity, the filter element is located between the gas inlet and the outlet, the filter element comprises a frame and a filter body located in the frame, and the two sides of the frame are attached to the inner wall of the filter cavity. Fuel gas passes through two layers of filter screens with different pore diameters in sequence and then passes through the filter part, the filter screens achieve coarse filtration and fine filtration of the fuel gas, the filter part is used for adsorbing colloidal impurities in the fuel gas, and the filter part and the filter part are matched to enhance the filtering effect of the fuel gas filter. The filter screen and the filter piece are separated and can be replaced independently, and a gap is formed between the filter screen and the filter piece and facilitates replacement of the filter screen and the filter piece.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a fuel gas filter. Background Art

[0002] The gas purification filter is a device that purifies gas during gas transportation. It is often installed at the air inlet end of a pressure reducing valve, a pressure relief valve, a positioning valve or other equipment to eliminate impurities in the medium to protect the normal use of valves and equipment and reduce equipment maintenance costs.

[0003] Gas filters usually use filter meshes for filtering, which can effectively filter out particulate impurities. However, there may also be colloidal impurities in the gas, and the colloidal impurities can pass through the filter mesh and affect the equipment in the gas pipeline network. Utility Model Content

[0004] The purpose of the utility model is to solve the problem mentioned in the prior art that colloidal impurities may also exist in the gas, and the colloidal impurities can pass through the filter screen to affect the equipment in the gas network.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A gas filter comprises: a shell having a filter cavity arranged thereon, an air inlet and an outlet connected to the filter cavity arranged on the shell, the air inlet and the outlet being both connected to a pipeline; a filter element arranged in the filter cavity, the filter element being located between the air inlet and the outlet, the filter element comprising a frame and a filter body located in the frame, the two sides of the frame being in contact with the inner wall of the filter cavity.

[0007] Preferably, a filter screen is provided between the filter element and the air inlet, and the filter screen filters particulate impurities.

[0008] Preferably, a shell is arranged around the filter screen, the shell is fitted with the filter cavity, two layers of filter screens are arranged inside the shell, and the apertures of the two layers of filter screens are different to achieve the coordination of coarse filtration and fine filtration.

[0009] Preferably, there is a gap between the filter screen and the filter element, and the gap facilitates replacement of the filter screen and the filter element.

[0010] Preferably, two side surfaces of the filter body are provided with support bars, the support bars are connected to the frame, and the support bars are used to protect the filter body.

[0011] Preferably, the bottom of the filter cavity is provided with limiting strips distributed on both sides of the frame and the shell, and the limiting strips limit the filter element and the filter screen.

[0012] Preferably, an opening is provided on the upper side of the shell, and a sealing cover for sealing the opening is provided on the shell. The sealing cover is detachably connected, and the filter screen and the filter element can be replaced after the sealing cover is removed.

[0013] Preferably, a sealing gasket 1 is provided on the sealing cover, and the sealing gasket 1 is arranged on the lower surface of the sealing cover. The sealing gasket 1 is adapted to the opening, and the sealing gasket 1 is elastic and is used to seal the opening.

[0014] Preferably, the tops of the filter element and the filter screen are flush, the distance between the top surface of the filter element and the open end surface is less than the thickness of the sealing gasket 1, and the sealing gasket 1 can be brought into close contact with the tops of the filter element and the filter screen by tightening the bolts.

[0015] Preferably, a sealing gasket 2 is provided in the filter cavity, the sealing gasket 2 is symmetrically arranged, and the sealing gasket 2 is also elastic. When the filter element and the filter net are installed, the two sides of the shell and the frame can be in close contact with the sealing gasket 2 through interference fit, thereby ensuring the sealing.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] By arranging the filter screen in front of the filter element, when in use, after the gas enters the filter cavity from the air inlet, it passes through two layers of filter screens with different apertures, and then passes through the filter element. The filter screen performs coarse and fine filtration, and the filter element is used to absorb colloidal impurities in the gas. The combination of the two enhances the filtering effect of the gas filter.

[0018] By separating the filter screen and the filter element, the two can be replaced separately, and there is a gap between the filter screen and the filter element, which facilitates the replacement of the filter screen and the filter element;

[0019] The connection between the housing, the filter element and the filter screen is sealed by the sealing gasket 1 and the sealing gasket 2, so that all the passing gas is filtered. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Figure 2 This is a schematic diagram of the installation of the filter element and filter screen of the utility model.

[0023] Figure 3For the utility model Figure 2 Enlarged schematic diagram at point A in the middle.

[0024] Figure 4 It is a schematic diagram of the interior of the shell of the utility model.

[0025] Figure 5 It is a schematic diagram of the filter element and filter screen of the utility model.

[0026] Explanation of the figure numbers: 1. Shell; 11. Filter chamber; 12. Air inlet; 13. Outlet; 2. Filter element; 21. Frame; 22. Filter body; 3. Filter screen; 4. Shell; 5. Support bar; 6. Limit bar; 7. Sealing cover; 8. Sealing gasket 1; 9. Sealing gasket 2. DETAILED DESCRIPTION

[0027] The utility model is described in further detail below in conjunction with the accompanying drawings.

[0028] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be used for other implementation schemes, variations, improvements, equivalent schemes, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0029] Those skilled in the art should understand that, in the disclosure of the present invention, the directions or positions indicated by the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0030] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0031] See also Figure 1 - Figure 5A gas filter comprises: a shell 1, on which a filter chamber 11 is arranged, and an air inlet 12 and an outlet 13 connected to the filter chamber 11 are arranged on the shell 1, the air inlet 12 and the outlet 13 are both connected to a pipeline, and the gas enters from the air inlet 12; a filter element 2, which is arranged in the filter chamber 11, the filter element 2 is located between the air inlet 12 and the outlet 13, the filter element 2 comprises a frame 21 and a filter body 22 located in the frame 21, the filter body 22 can be made of cotton wool, or other materials that can absorb colloidal impurities in the gas, such as activated carbon, and both sides of the frame 21 are in contact with the inner wall of the filter chamber 11.

[0032] A filter screen 3 is provided between the filter element 2 and the air inlet 12, and the filter screen 3 filters particulate impurities in the fuel gas.

[0033] A shell 4 is arranged around the filter 3, and the shell 4 fits the filter cavity 11. Two layers of filter 3 are arranged inside the shell 4. The apertures of the two layers of filter 3 are different, so as to achieve coarse and fine filtering of the fuel gas.

[0034] There is a gap between the filter screen 3 and the filter element 2, and the gap facilitates the replacement of the filter screen 3 and the filter element 2.

[0035] The two side surfaces of the filter body 22 are provided with support bars 5 , which are connected to the frame 21 . During installation, the support bars 5 prevent the filter body 22 from being pinched, thereby ensuring that the filter body 22 can be used normally.

[0036] The bottom of the filter cavity 11 is provided with limiting strips 6 distributed on both sides of the frame 21 and the shell 4. The limiting strips 6 limit the filter element 2 and the filter screen 3 to make them stable.

[0037] An opening is provided on the upper side of the shell 1, and a sealing cover 7 for sealing the opening is provided on the shell 1. The sealing cover 7 is detachably connected. After removing the sealing cover, the filter 3 and the filter element 2 can be replaced. The filter 3 for filtering gas particles and the filter element 2 for filtering colloidal impurities are separated and can be replaced separately. For example, when the filter 3 needs to be replaced, only the filter 3 is replaced.

[0038] A sealing gasket 8 is arranged on the sealing cover 7, and the sealing gasket 8 is arranged on the lower surface of the sealing cover 7. The sealing gasket 8 is adapted to the opening, and the sealing gasket 8 is elastic. The sealing cover 7 is connected to the shell 1 by bolts, and the sealing gasket 8 is in contact with the outer shell 4 and the frame 21, thereby sealing the opening to prevent the gas from passing through here.

[0039] The tops of the filter element 2 and the filter screen 3 are flush, and the distance between the top surface of the filter element 2 and the open end surface is less than the thickness of the sealing gasket 8. When the sealing cover 7 is connected, the sealing gasket 8 can be brought into close contact with the tops of the filter element 2 and the filter screen 3 through bolts, thereby ensuring the sealing performance and increasing the stability of the filter element 2 and the filter screen 3.

[0040] A sealing gasket 29 is provided in the filter chamber 11. The sealing gasket 29 is symmetrically arranged and is also elastic. A sealing gasket 29 is provided on both sides of the outer shell 4 and the frame 21. When the filter element 2 and the filter net 3 are installed, the outer shell 4 and the frame 21 can be in close contact with the sealing gasket 29 on both sides through interference fit, thereby ensuring the sealing.

[0041] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed or modified in any way.

Claims

1. A gas filter, characterized in that: include: A housing (1) having a filter chamber (11) disposed thereon, wherein the housing (1) is provided with an air inlet (12) and an outlet (13) which are in communication with the filter chamber (11); A filter element (2) is arranged in a filter cavity (11), the filter element (2) being located between an air inlet (12) and an outlet (13), the filter element (2) comprising a frame (21) and a filter body (22) located in the frame (21), the two sides of the frame (21) being in contact with the inner wall of the filter cavity (11), a filter screen (3) being arranged between the filter element (2) and the air inlet (12), an opening being arranged on the upper side of the shell (1), a sealing cover (7) for sealing the opening being arranged on the shell (1), the sealing cover (7) being detachably connected, a sealing gasket (8) being arranged on the sealing cover (7), the sealing gasket (8) being adapted to the opening, the tops of the filter element (2) and the filter screen (3) being flush, the distance between the top surface of the filter element (2) and the end surface of the opening being less than the thickness of the sealing gasket (8).

2. A gas filter according to claim 1, characterized in that: Support bars (5) are provided on both side surfaces of the filter body (22), and the support bars (5) are connected to the frame (21).

3. A gas filter according to claim 2, characterized in that: An outer shell (4) is arranged around the filter screen (3), and the outer shell (4) is fitted with the filter cavity (11).

4. A fuel gas filter according to claim 3, characterized in that: There is a gap between the filter screen (3) and the filter element (2).

5. A fuel gas filter according to claim 4, characterized in that: The bottom of the filter cavity (11) is provided with limiting strips (6) distributed on both sides of the frame (21) and the outer shell (4).

6. A fuel gas filter according to claim 5, characterized in that: A second sealing gasket (9) is arranged in the filter cavity (11), and the second sealing gasket (9) is symmetrically arranged.

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