Combined compressed air filter

Abstract

The utility model discloses a combined compressed air filter which comprises a U-shaped shell, a flange cover plate, a filter element bracket, a coarse filter element, a fine filter element, a ball valve, an automatic drainer and a sealing gasket, a filter element seat plate is arranged in the U-shaped shell, the two filter barrels are connected through an air return pipe, and the coarse filter element, the fine filter element and the filter element support are assembled into a whole and are integrally mounted and fixed on the filter element seat plate of the filter barrels. The compressed air filter is small in size, rough filtration and fine filtration of compressed air are achieved at a time, pressure loss of the compressed air can be effectively reduced, separated liquid is convenient to collect and discharge, and the phenomenon of air blockage is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of filters, and in particular relates to a compressed air filter. Background Art

[0002] The compressed air from the air compressor contains a large amount of liquid water, particulate impurities and some liquid oil, and must be filtered through multiple filters before it can be sent to the back end for use. Therefore, before using the air, the compressed air must be filtered through multiple stages using filters of different precision levels, and it can be used after reaching the corresponding cleanliness level. The common compressed air filters on the market are all single-stage filters, as shown in Figure (2). In order to achieve the ideal cleanliness requirements, multiple filters of different filtration precision levels need to be connected in series, resulting in a large filter size, many interfaces, and high installation and investment costs. In addition, after the single-stage filters are assembled in series, the gas flow path has many bends and the overall pressure loss is high. Summary of the invention

[0003] The purpose of the utility model is to provide a combined compressed air filter to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a combined compressed air filter, comprising a U-shaped shell, a flange cover, a filter element bracket, a coarse filter element, a fine filter element, and also comprising a ball valve, an automatic drainer and a sealing gasket; the U-shaped shell and the flange cover press the sealing gasket and then fix and seal it by fastening bolts, and the coarse filter element, the fine filter element and the filter element bracket are threadedly connected and fixedly installed as a whole in the two filter barrels of the U-shaped shell.

[0005] Furthermore, the U-shaped shell is divided into two left and right filter barrels, the two filter barrels share a U-shaped bend at the bottom, a drainage port is provided at the bottom of the U-shaped bend, and a filter element seat plate is provided in each of the two filter barrels.

[0006] Furthermore, the two filter barrels of the U-shaped shell are connected by an air return duct.

[0007] Furthermore, the filter element bracket is fixed to the filter element seat plate of the U-shaped housing by means of bolts or buckles.

[0008] Technical effects and advantages of the utility model:

[0009] The utility model has a compact structure and a small size, and one filter can realize the functions of coarse filtration and fine filtration of compressed air;

[0010] The utility model adopts a U-shaped shell, and the waste water and waste oil generated by coarse filtration and fine filtration will accumulate at the bottom of the U-shaped bend, so that all discharge can be achieved with one automatic drainer, and the overall cost is low;

[0011] The compressed air circulates simply in the structure of the utility model, the flow channel resistance is small, and the overall pressure loss of the system is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] In the figure: 1 U-type housing, 2 flange cover, 3 filter element bracket, 4 coarse filter element, 5 fine filter element, 6 sealing gasket, 7 ball valve, 8 automatic drain, 9 fastening bolts, 10 filter element seat plate, 11 return air pipe;

[0014] Figure 2 A schematic diagram of the structure of an existing filter. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] like Figure 1 A specific embodiment of a combined compressed air filter of the utility model is shown: it includes a U-shaped shell 1, a flange cover plate 2, a filter element bracket 3, a coarse filter element 4 and a fine filter element 5; a filter element seat plate 10 is welded and fixed in the two filter barrels of the U-shaped shell 1, and there is an air return pipe 11 under the filter element seat plate 10 to connect the two filter barrels. The filter element bracket 3 has a screw of a fixed length, which is threadedly connected to the coarse filter element 4 and the fine filter element 5 respectively, and is installed and fixed on the filter element seat plate 10 as a whole, wherein: the filter element bracket 3 and the filter element seat plate 10 can be fixed by screws or by buckles. The U-shaped shell 1 and the flange cover plate 2 are sealed and fixed by a sealing gasket 6 and a fastening bolt 9.

[0017] Compressed air enters the coarse filter element 4 from the filter inlet, enters the fine filter element 5 after coarse filtration, and flows out from the compressed air outlet after two-stage filtration. Liquids such as water and oil in the compressed air will accumulate on the surface of the filter element and drip into the U-shaped bend. A drain port is provided at the lowest point of the U-shaped bend. These waste liquids flow into the automatic drainer 8 through the ball valve 7 on the drain port to achieve automatic discharge of waste liquid. The return air pipe 11 can ensure the structural stability of the U-shaped shell when it is stressed, and at the same time can avoid air blockage when a large amount of liquid water fills the U-shaped bend.

[0018] The applicant further declares that the present invention illustrates the implementation method and device structure of the present invention through the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above methods and structures to be implemented. Those skilled in the art should understand that any improvement to the present invention, equivalent replacement of the implementation method selected by the present invention, addition of steps, selection of specific methods, etc., all fall within the scope of protection and disclosure of the present invention.

[0019] The present invention is not limited to the above-mentioned embodiments, and all methods that use structures and methods similar to the present invention to achieve the purpose of the present invention are within the protection scope of the present invention.

Claims

1. A combined compressed air filter, comprising a U-shaped housing (1), a flange cover (2), a filter element support (3), a coarse filter element (4), and a fine filter element (5), characterized in that: It also includes a sealing gasket (6), a ball valve (7), and an automatic drainer (8); the U-shaped housing (1) and the flange cover plate (2) compress the sealing gasket (6) to seal the housing, and are fixed by fastening bolts (9); the coarse filter element (4), the fine filter element (5) and the filter element bracket (3) are threadedly connected to form an integral body, and the whole is fixedly installed in the two filter barrels of the U-shaped housing (1).

2. The combined compressed air filter according to claim 1, characterized in that: The U-shaped housing (1) is in a U-shape, and a filter element seat plate (10) is provided in each of the left and right filter barrels thereof for supporting and fixing the filter element bracket (3). The left and right filter barrels of the U-shaped housing (1) share a U-shaped bend, and a drainage outlet is provided at the lowest point of the U-shaped bend.

3. The combined compressed air filter according to claim 1, characterized in that: An air return pipe (11) is provided between the left and right filter barrels of the U-shaped housing (1). The air return pipe (11) is located below the filter element seat plate (10) and connects the left and right filter barrels.

4. The combined compressed air filter according to claim 1 or claim 2, characterized in that: The filter element bracket (3) is fixed to the filter element base plate (10) by means of screws or buckles.

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