High pressure filter with integrated filter cartridge

Abstract

The utility model discloses a high-pressure filter with an integrated filter cartridge, which is assembled from a filter head, a filter cartridge and a filter element assembly. The utility model adopts a cold-extruded integrated filter cartridge, which tightly combines the filter head, the filter cartridge and the filter element assembly, simplifies the structure, improves the pressure resistance of the filter cartridge, and is suitable for ultra-high pressure filtration applications; radial elastic sealing rings are used between the filter head and the filter cartridge, and between the filter head and the filter element assembly, which reduces the requirements for dimensional processing accuracy and process control, reduces costs, and reduces usage requirements, and improves the convenience of manufacturing and use; the filter head is built with a one-way bypass valve, and when the flow pressure difference between the liquid inlet cavity and the liquid outlet cavity is too large, the one-way bypass valve automatically opens to alleviate the flow pressure difference inside the filter and improve safety; the threaded connection hole on the top end face of the filter head is convenient for installing and fixing the filter, can be hoisted, is easy to install and disassemble, and saves space.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure filters, in particular to a high-pressure filter with an integrated filter cartridge. Background Art

[0002] The filter is an indispensable device for conveying medium pipelines, usually installed before the pressure reducing valve, pressure relief valve, and water level valve. When the fluid passes through the filter, its impurities will be blocked. When cleaning is needed, just take out the filter cartridge, clean it, and then reinstall it. The effect is significant and maintenance is convenient.

[0003] A Chinese patent (application number: 202221201277.7, application date: 2022.05.18) discloses a radially sealed high-pressure filter, which uses a radial elastic sealing ring to seal the filter head and the filter cartridge, and has the advantages of reducing dimensional processing accuracy, process control requirements, reducing costs, and reducing usage requirements. A discharge hole is provided at the end of the filter cartridge of the above-mentioned high-pressure filter, and an equipment block is installed. When replacing the filter element, the equipment block is first unscrewed to discharge the liquid in the filter cartridge to prevent the liquid from splashing and polluting the surrounding environment. The disadvantage of this structure is that it reduces the overall sealing performance of the filter cartridge and is not suitable for ultra-high pressure environments; in addition, the filter cartridge is a cylindrical structure, and there is usually a disadvantage that the filter cartridge is difficult to disassemble and assemble. Utility Model Content

[0004] In order to solve the above defects of the existing high-pressure filters, the utility model provides a high-pressure filter with an integrated filter cartridge.

[0005] The technical solution adopted by the utility model is as follows: a high-pressure filter with an integrated filter cartridge, comprising: a filter head, having a liquid inlet chamber, a filter cartridge chamber and a liquid outlet chamber connected in sequence; a filter cartridge, which is a cold-extruded integrated shell with one end open and the other end closed, the open end of the shell being sealed and installed in the filter cartridge chamber; a filter element assembly, which is installed in the shell, the filter element assembly is cylindrical, the outer side is the front filter side, which is connected to the liquid inlet chamber, and the center is the rear filter side, which is connected to the liquid outlet chamber.

[0006] Preferably, the outer end surface of the closed end of the shell has an integral screw head.

[0007] Preferably, the open end of the shell is provided with a sealing section and a threaded connection section axially from outside to inside, and the outer peripheral wall of the sealing section is provided with a first annular groove, and a first sealing ring and a closed retaining ring are installed in the first annular groove.

[0008] Preferably, the filter element assembly includes: a central support tube, which is sealed with a plurality of liquid holes; a filter material, which is installed in a cylindrical shape on the outer periphery of the central support tube; an upper cover and a lower cover, which are clamped at both ends of the filter material and fixed as a whole with the central support tube; and a central hole, which is arranged in the center of the upper cover and is connected to the liquid outlet cavity.

[0009] Preferably, a plug-in tube is provided in the filter cartridge cavity, and the center hole is plug-fitted with the plug-in tube; a second annular groove is provided inside the center hole, and a second sealing ring is installed in the second annular groove.

[0010] Preferably, a gap d between the lower cover and the housing is smaller than a length L of the plug-in tube.

[0011] Preferably, a valve hole plate is provided between the liquid inlet chamber and the liquid outlet chamber, and a one-way bypass valve from the liquid inlet chamber to the liquid outlet chamber is installed in the valve hole plate.

[0012] Preferably, a plurality of threaded connection holes are provided on the top end surface of the filter head.

[0013] The utility model has the following beneficial effects:

[0014] 1. The cold extruded integrated filter cartridge is used to tightly combine the filter head, filter cartridge and filter element components, which simplifies the structure and improves the pressure resistance of the filter cartridge, making it suitable for ultra-high pressure filtration applications;

[0015] 2. The radial elastic sealing ring is used between the filter head and the filter cartridge, and between the filter head and the filter element assembly, which reduces the requirements for dimensional processing accuracy and process control, reduces costs, reduces usage requirements, and improves the convenience of manufacturing and use;

[0016] 3. The filter head is equipped with a one-way bypass valve. When the flow pressure difference between the inlet chamber and the outlet chamber is too large, the one-way bypass valve automatically opens to alleviate the flow pressure difference inside the filter and improve safety;

[0017] 4. The threaded connection hole on the top end face of the filter head is convenient for installing and fixing the filter, which can be hoisted, easy to install and disassemble, and saves space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the appearance of an embodiment of the utility model.

[0019] Figure 2 It is an installation schematic diagram of an embodiment of the utility model.

[0020] Figure 3 It is a schematic diagram of a filter head in an embodiment of the utility model.

[0021] Figure 4 It is a cross-sectional schematic diagram of an embodiment of the utility model.

[0022] Figure 5 It is a top view schematic diagram of an embodiment of the utility model.

[0023] Filter head 1, liquid inlet cavity 101, filter cartridge cavity 102, liquid outlet cavity 103, plug-in tube 104, valve hole plate 105, threaded connection hole 106;

[0024] Filter cartridge 2, housing 201, screw head 202, sealing section 203, threaded connection section 204, first annular groove 205;

[0025] Filter element assembly 3, central support tube 301, liquid passage hole 302, filter material 303, upper cover 304, lower cover 305, central hole 306;

[0026] The first sealing ring 4;

[0027] Closed retaining ring 5;

[0028] Second sealing ring 6;

[0029] One-way bypass valve 7. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the embodiments and drawings.

[0031] In the embodiment, Figures 1 to 5 As shown, a high-pressure filter with an integrated filter cartridge comprises: a filter head 1 having a liquid inlet chamber 101, a filter cartridge chamber 102 and a liquid outlet chamber 103 connected in sequence; a filter cartridge 2, which is a cold-extruded integrated housing 201 with one end open and the other end closed, and the open end of the housing 201 is sealed and installed in the filter cartridge chamber 102; a filter element assembly 3, which is installed in the housing 201, and the filter element assembly 3 is cylindrical, with the outer side being the filter front side, which is connected to the liquid inlet chamber 101, and the center being the filter rear side, which is connected to the liquid outlet chamber 103. This embodiment adopts a cold-extruded integrated filter cartridge 2, which tightly combines the filter head 1, the filter cartridge 2 and the filter element assembly 3, simplifies the structure, and improves the pressure resistance performance (52.5MPa) of the filter cartridge 2, which is suitable for ultra-high pressure filtration applications.

[0032] In the embodiment, Figure 4 As shown, the outer end surface of the closed end of the housing 201 has an integral screw head 202. The filter cartridge 2 is generally a cylindrical structure, which has the disadvantage of being difficult to disassemble and assemble. In this embodiment, an integral screw head 202 is provided at the end of the filter cartridge 2, and the housing 201 is greatly reduced in difficulty when used with tools such as a wrench or a socket.

[0033] In the embodiment, Figure 2 , 4As shown, the open end of the housing 201 is provided with a sealing section 203 and a threaded connection section 204 along the axial direction from the outside to the inside, and the outer peripheral wall of the sealing section 203 is provided with a first annular groove 205, in which the first sealing ring 4 and the closed retaining ring 5 are installed. The housing thickness of the housing 201 of this embodiment is basically unchanged, and the threaded connection section 204 is connected to the internal thread of the filter cartridge cavity 102 of the filter head 1, and has good structural strength and pressure resistance. The sealing section 203 realizes radial elastic sealing through the first sealing ring 4, the closed retaining ring 5 and the inner wall of the filter cartridge cavity 102, and has good sealing performance, while reducing the requirements for dimensional processing accuracy and process control, reducing costs, and at the same time reducing usage requirements, and improving the convenience of manufacturing and use.

[0034] In the embodiment, Figure 2 , 4 As shown, the filter element assembly 3 includes: a central support tube 301, which is sealed with a plurality of liquid holes 302; a filter material 303, which is cylindrically installed on the outer periphery of the central support tube 301; an upper cover 304 and a lower cover 305, which are clamped at both ends of the filter material 303 and fixed to the central support tube 301 as a whole; a central hole 306, which is arranged at the center of the upper cover 304 and communicates with the liquid outlet cavity 103. A plug-in tube 104 is arranged in the filter cartridge cavity 102, and the central hole 306 is plugged and matched with the plug-in tube 104; a second annular groove 307 is arranged inside the central hole 306, and a second sealing ring 6 is installed in the second annular groove 307. The gap d between the lower cover 305 and the housing 201 is less than the length L of the plug-in tube 104. In the above structure, the radial elastic seal is achieved between the filter element assembly 3 and the plug-in tube 104 through the second sealing ring 6, which has the advantages of good sealing performance, convenient manufacturing and use. Moreover, the filter element assembly 3 and the plug-in tube 104 are in a slidable structure and do not need to be tightly fitted, so the filter element assembly 3 is very convenient to disassemble and assemble, and the filter element assembly 3 is convenient to clean and replace.

[0035] In the embodiment, Figure 2 , 4 As shown, a valve hole plate 105 is provided between the liquid inlet chamber 101 and the liquid outlet chamber 103, and a one-way bypass valve 7 from the liquid inlet chamber 101 to the liquid outlet chamber 103 is installed in the valve hole plate 105. When the flow pressure difference between the liquid inlet chamber 101 and the liquid outlet chamber 103 is too large, the one-way bypass valve 7 built into the filter head 1 automatically opens to alleviate the flow pressure difference inside the filter and improve safety.

[0036] In the embodiment, Figure 2 , 5 As shown, the top end surface of the filter head 1 is provided with a plurality of threaded connection holes 106. The threaded connection holes 106 are used to install and fix the filter, and can realize the hoisting of the filter, which has the advantages of convenient installation and disassembly, and can save installation space.

[0037] Obviously, the above embodiments of the present invention are only examples for explaining the present invention, and are not intended to limit the implementation methods of the present invention. Other obvious changes or modifications derived from the essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A high pressure filter with an integrated filter cartridge, characterized in that: include: The filter head (1) comprises a liquid inlet cavity (101), a filter cartridge cavity (102) and a liquid outlet cavity (103) which are connected in sequence; The filter cartridge (2) is a cold-extruded one-piece shell (201) with one end open and the other end closed, and the open end of the shell (201) is sealed and installed in the filter cartridge cavity (102); The filter element assembly (3) is installed in the housing (201); the filter element assembly (3) is cylindrical, the outer side is the front filter side, which is connected to the liquid inlet chamber (101), and the center is the rear filter side, which is connected to the liquid outlet chamber (103).

2. The high pressure filter with an integrated filter cartridge according to claim 1, characterized in that: The outer end surface of the closed end of the shell (201) has an integral screw head (202).

3. The high pressure filter with an integrated filter cartridge according to claim 1, characterized in that: The open end of the housing (201) is provided with a sealing section (203) and a threaded connection section (204) axially from outside to inside, and the outer peripheral wall of the sealing section (203) is provided with a first annular groove (205). A first sealing ring (4) and a closed retaining ring (5) are installed in the first annular groove (205).

4. The high pressure filter with an integrated filter cartridge according to claim 1, characterized in that: The filter element assembly (3) comprises: The central support tube (301) is sealed with a plurality of liquid holes (302); The filter material (303) is in a cylindrical shape and is installed on the outer periphery of the central support tube (301); An upper cover (304) and a lower cover (305) are clamped at two ends of the filter material (303) and fixed integrally with the central support tube (301); A central hole (306) is arranged at the center of the upper cover (304) and is connected to the liquid outlet cavity (103).

5. The high pressure filter with an integrated filter cartridge according to claim 4, characterized in that: A plug-in tube (104) is provided in the filter cartridge cavity (102), and the central hole (306) is plugged into and matched with the plug-in tube (104); a second annular groove (307) is provided inside the central hole (306), and a second sealing ring (6) is installed in the second annular groove (307).

6. The high pressure filter with an integrated filter cartridge according to claim 5, characterized in that: The gap d between the lower cover (305) and the housing (201) is smaller than the length L of the plug-in tube (104).

7. The high pressure filter with an integrated filter cartridge according to claim 1, characterized in that: A valve hole plate (105) is provided between the liquid inlet chamber (101) and the liquid outlet chamber (103), and a one-way bypass valve (7) from the liquid inlet chamber (101) to the liquid outlet chamber (103) is installed in the valve hole plate (105).

8. The high pressure filter with an integrated filter cartridge according to claim 1, characterized in that: A plurality of threaded connection holes (106) are provided on the top end surface of the filter head (1).

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