Combined filter

Abstract

The utility model relates to the technical field of filters, in particular to a combined filter which comprises a shell and a filter element assembly arranged in the shell, the shell sequentially comprises a top cover, a liquid inlet cylinder and a liquid outlet cylinder which are in threaded sealing connection, and a pipe joint is arranged on one side of the liquid inlet cylinder; the filter element assembly sequentially comprises an I-shaped filter pipe, a supporting pipe and a plug which are in threaded sealing connection; a filter element which is tightly pressed between the I-shaped filter tube and the plug in a sealing manner is sleeved on the supporting tube; the top of the I-shaped filter tube is tightly pressed between the top cover and the liquid inlet cylinder in a sealing manner and is provided with a lifting part, and the bottom is connected with the liquid inlet cylinder in a sealing manner; and a plurality of filtering holes communicated with the pipe joint are uniformly distributed on the I-shaped filtering pipe and the supporting pipe. The filter element assembly can be conveniently taken out by unscrewing the top cover; by unscrewing the plug, the filter element can be conveniently taken out, only the filter element needs to be replaced, and materials for producing the filter element assembly can be saved while convenience in use is guaranteed.

Description

Technical Field

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

[0002] After existing single crystal silicon wafers are subjected to mechanical processing such as slicing and grinding, the damaged layer formed on the surface of the wafer due to processing stress is usually removed by chemical corrosion. For example, corrosion A is acid corrosion, and a mixed acid solution is used to remove the damaged layer, producing hydrogen fluoride, NOX and waste mixed acid; corrosion B is alkaline corrosion, and a sodium hydroxide solution is used to remove the damaged layer, producing waste alkali liquid. These chemical waste liquids are mixed with solid particle impurities and need to be extracted to the filter for filtration and recycling. Existing filters come in a variety of models and specifications, generally including a housing and a filter element assembly in the housing; the housing is usually welded as a whole, and the filter element assembly is an integrated structure. For example, the filter element assembly for a filter disclosed in Chinese utility model patent CN220715041U is composed of a filter element, a bracket and a joint, which is a waste of resources and inconvenient to replace.

[0003] Therefore, it is urgent to design a combined filter that is easy to replace the filter element and saves the production resources of the filter element assembly. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects and shortcomings in the prior art. To this end, the utility model provides a combined filter that can facilitate the replacement of filter elements and save resources.

[0005] In order to achieve the above object, the utility model provides a combined filter, comprising a housing and a filter element assembly arranged in the housing, wherein the housing sequentially comprises a top cover, a liquid inlet cylinder and a liquid outlet cylinder connected by threads and sealing, and a pipe joint is provided on one side of the liquid inlet cylinder;

[0006] The filter element assembly comprises an I-shaped filter tube, a support tube and a plug connected by threads in sequence; a filter element is sleeved on the support tube and sealed and pressed between the I-shaped filter tube and the plug; the top of the I-shaped filter tube is sealed and pressed between the top cover and the liquid inlet cylinder and is provided with a lifting part, and the bottom is sealed and connected to the liquid inlet cylinder; a plurality of filter holes communicating with the pipe joint are evenly distributed on the I-shaped filter tube and the support tube.

[0007] Furthermore, a sealing ring with a skeleton is provided between the bottom of the I-shaped filter tube and the liquid inlet cylinder, and the sealing ring is tightly sealed between the liquid inlet cylinder and the liquid outlet cylinder.

[0008] Furthermore, the bottom of the I-shaped filter tube is a frustum with the large end facing upward.

[0009] Furthermore, the lifting portion is a cylinder with an annular groove.

[0010] Furthermore, the bottom of the I-shaped filter tube and the top of the plug are both provided with an annular boss with a V-shaped cross section, and the annular boss is embedded in the end surface of the filter element.

[0011] Furthermore, a U-shaped handle is provided on the top of the top cover.

[0012] Furthermore, a rubber threaded sleeve is embedded in the top sealing card of the liquid inlet cylinder, and the rubber threaded sleeve is threadedly connected to the top cover.

[0013] Furthermore, the top cover and the top end of the liquid inlet cylinder are provided with matching chamfered surfaces.

[0014] Furthermore, a connecting flange is provided on the liquid outlet cylinder.

[0015] Compared with the prior art, the beneficial effects of the utility model are: when disassembling and assembling the filter element, under the premise that other parts do not need to be replaced, it is only necessary to twist open the top cover, take out the filter element assembly by lifting the step, unscrew the plug and replace it, which is very convenient for disassembly and assembly, saving the production resources of the filter element assembly; and it is possible to install filter elements of different thicknesses and filter materials, and select the appropriate liquid outlet cylinder and liquid inlet cylinder connection combination, thereby improving the overall practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a cross-sectional schematic diagram of the utility model.

[0018] Among them: 1. Top cover; 2. Liquid inlet cylinder; 3. Liquid outlet cylinder; 4. Pipe joint; 5. I-shaped filter tube; 6. Support tube; 7. Filter element; 8. Sealing ring; 9. Plug; 11. U-shaped handle; 12. Rubber threaded sleeve; 31. Connecting flange; 51. Lifting part. DETAILED DESCRIPTION

[0019] 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.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] Example

[0022] See also Figure 1 and Figure 2 The utility model provides a combined filter, including a housing and a filter element assembly arranged in the housing. The housing includes a top cover 1, a liquid inlet cylinder 2 and a liquid outlet cylinder 3 connected by threads and seals in sequence, and a pipe joint 4 is provided on one side of the liquid inlet cylinder 2; the filter element assembly includes an I-shaped filter tube 5, a support tube 6 and a plug 9 connected by threads and seals in sequence; a filter element 7 sealed and pressed between the I-shaped filter tube 5 and the plug 9 is sleeved on the support tube 6; the top of the I-shaped filter tube 5 is sealed and pressed between the top cover 1 and the liquid inlet cylinder 2 and is provided with a lifting part 51, and the bottom is sealed and connected with the liquid inlet cylinder 2; a plurality of filter holes communicating with the pipe joint 4 are evenly distributed on the I-shaped filter tube 5 and the support tube 6.

[0023] The lifting portion 51 is preferably a cylinder with an annular groove. When replacing, unscrew the top cover 1, and the worker grabs the annular groove and takes out the entire filter element assembly.

[0024] As an embodiment of the utility model, a sealing ring 8 with a skeleton is provided between the bottom of the I-shaped filter tube 5 and the liquid inlet cylinder 2. The sealing ring 8 is sealed and pressed between the liquid inlet cylinder 2 and the liquid outlet cylinder 3 to prevent the waste liquid flowing in from the pipe joint 4 from entering the liquid outlet cylinder 3.

[0025] The bottom of the I-shaped filter tube 5 is preferably a frustum with the large end facing upwards, so as to facilitate the extraction and placement of the filter element assembly.

[0026] As an embodiment of the utility model, the bottom of the I-shaped filter tube 5 and the top of the plug 9 are both provided with an annular boss with a V-shaped cross section, and the annular boss is embedded in the end surface of the filter element 7. The annular boss here plays the role of positioning and assisting in compression and sealing, thereby improving the stability of the filter element 7.

[0027] In addition, the top of the top cover 1 can be provided with a U-shaped handle 11 for overall carrying. The top of the liquid inlet cylinder 2 can be sealed and embedded with a rubber threaded sleeve 12, which is threadedly connected to the top cover 1 to further improve the sealing between the top cover 1 and the liquid inlet cylinder 2. A matching chamfered surface can be provided between the top cover 1 and the top outside of the liquid inlet cylinder 2 to further ensure the sealing. A connecting flange 31 can be provided on the liquid outlet cylinder 3 to facilitate overall installation and fixing. The top of the above-mentioned filter element 7 can be embedded in the top of the liquid inlet cylinder 2 to improve the stability of the filter element 7.

[0028] The above-mentioned sealing compression and sealing card embedding connection methods can be completed by applying sealant, and the details are not repeated here.

[0029] When the utility model is in use, the waste liquid enters the I-shaped filter tube 5 in the liquid inlet cylinder 2 from the pipe joint 4 to complete the preliminary filtration of large particles of solid impurities, and the waste liquid enters the support tube 6 through the corresponding filter holes, and is filtered through the filter core 7 from the filter holes on the support tube 6, and the filtered waste liquid flows out from the bottom of the liquid outlet cylinder 3; the whole can withstand 10 kg of pressure for operation. When it is necessary to replace the filter core 7, unscrew the top cover, extract the filter core assembly and unscrew the plug 9, and pull the filter core 7 out of the support tube 6 to complete the replacement process. Only the filter core 7 needs to be replaced as a whole, so that the resources required for the production of the filter core assembly can be saved.

[0030] The utility model is convenient and quick to use as a whole, and the shell and filter element assembly can be replaced with materials according to the use requirements and integrated into one, ensuring acid resistance, alkali resistance, and high pressure resistance; for example, replacing the filter element 7 with different thicknesses and materials and the liquid outlet cylinder 3 with matching sizes can improve the overall practicality.

[0031] The utility model can be summarized in other specific forms that do not violate the spirit or main features of the utility model. Therefore, no matter from which point of view, the above embodiments of the utility model can only be regarded as an explanation of the utility model and cannot limit the utility model. The claims indicate the scope of the utility model, while the above description does not indicate the scope of the utility model. Therefore, any changes within the meaning and scope equivalent to the claims of the utility model should be considered to be included in the scope of the claims of the utility model.

Claims

1. A combined filter, comprising a housing and a filter element assembly disposed in the housing, characterized in that: The housing comprises in sequence a top cover (1), a liquid inlet cylinder (2) and a liquid outlet cylinder (3) which are threadedly sealed, and a pipe joint (4) is provided on one side of the liquid inlet cylinder (2); The filter element assembly comprises, in sequence, an I-shaped filter tube (5), a support tube (6) and a plug (9) which are threadedly sealed and connected; a filter element (7) is sleeved on the support tube (6) and is sealed and pressed between the I-shaped filter tube (5) and the plug (9); the top of the I-shaped filter tube (5) is sealed and pressed between the top cover (1) and the liquid inlet cylinder (2) and is provided with a lifting portion (51), and the bottom is sealed and connected to the liquid inlet cylinder (2); a plurality of filter holes which are in communication with the pipe joint (4) are evenly distributed on the I-shaped filter tube (5) and the support tube (6).

2. The combined filter according to claim 1, characterized in that: A sealing ring (8) with a skeleton is provided between the bottom of the I-shaped filter tube (5) and the liquid inlet cylinder (2), and the sealing ring (8) is tightly sealed between the liquid inlet cylinder (2) and the liquid outlet cylinder (3).

3. The combined filter according to claim 2, characterized in that: The bottom of the I-shaped filter tube (5) is a frustum with the large end facing upward.

4. The combined filter according to any one of claims 1 to 3, characterized in that: The lifting part (51) is a cylinder with an annular groove.

5. The combined filter according to claim 4, characterized in that: The bottom of the I-shaped filter tube (5) and the top of the plug (9) are both provided with an annular boss with a V-shaped cross section, and the annular boss is embedded in the end surface of the filter element (7).

6. The combined filter according to claim 5, characterized in that: A U-shaped handle (11) is provided on the top of the top cover (1).

7. The combined filter according to claim 6, characterized in that: A rubber threaded sleeve (12) is embedded in the top sealing card of the liquid inlet cylinder (2), and the rubber threaded sleeve (12) is threadedly connected to the top cover (1).

8. The combined filter according to claim 6, characterized in that: The top cover (1) and the top end of the liquid inlet cylinder (2) are provided with matching chamfered surfaces.

9. The combined filter according to claim 6, characterized in that: The liquid outlet cylinder (3) is provided with a connecting flange (31).

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