High-pressure fatigue-resistant filter

Abstract

The utility model discloses a high-pressure anti-fatigue filter, which belongs to the technical field of filters and comprises an outer shell, a liquid inlet and a liquid outlet are respectively arranged at two opposite ends of the outer shell, and the liquid inlet and the liquid outlet are respectively communicated with an inner cavity of the outer shell; the filter element assembly comprises a filter element framework, a barrel-shaped filter screen and a pressing frame, the barrel-shaped filter screen covers the liquid outlet, and a gap is formed between the outer side wall of the barrel-shaped filter screen and the side wall of the inner cavity of the outer shell; the filter element framework is supported in the cylindrical filter screen and connected with an inner cavity of the outer shell, the pressing frame is supported outside the cylindrical filter screen and connected with the filter element framework, and the cylindrical filter screen is fixed between the filter element framework and the pressing frame. According to the utility model, the cylindrical filter screen can keep higher supporting strength, the service life of the cylindrical filter screen is prolonged, the reliability of the cylindrical filter screen is improved, and the cylindrical filter screen can be stably used in a high-pressure environment for a long time.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter technical field especially is related to a high pressure fatigue filter. BACKGROUND

[0002] In all kinds of equipment of fluid doing work need stable and reliable supply clean fluid medium, facilitate power equipment can provide power efficiently and reliably. However, the medium supplied will inevitably have impurities, and it is particularly important to filter out all the impurities before the fluid does work. The conventional filter can significantly remove impurities in low-pressure equipment, but the service life and reliability of the conventional filter in high-pressure field are generally low, and the filter needs to be replaced frequently.

[0003] Therefore, a high-pressure fatigue filter is provided. SUMMARY

[0004] The utility model discloses a high pressure fatigue filter, and aims at solving or improving at least one of the above technical problems.

[0005] To achieve the above-mentioned purpose, the utility model provides the following scheme: the utility model provides a high pressure fatigue filter, comprising:

[0006] The outer shell body is provided with a liquid inlet and a liquid outlet at opposite ends, respectively, and the liquid inlet and the liquid outlet are communicated with the inner cavity of the outer shell body;

[0007] The filter cartridge assembly includes a filter cartridge skeleton, a cylindrical filter screen and a pressure frame. The cylindrical filter screen is arranged outside the liquid outlet, and the outer side wall of the cylindrical filter screen and the inner cavity side wall of the outer shell body have a gap. The filter cartridge skeleton is supported inside the cylindrical filter screen and connected with the inner cavity of the outer shell body. The pressure frame is supported outside the cylindrical filter screen and connected with the filter cartridge skeleton. The cylindrical filter screen is fixed between the filter cartridge skeleton and the pressure frame.

[0008] Optionally, the filter cartridge skeleton includes a filter cartridge support body, which is arranged in the inner cavity of the outer shell body and covers the liquid outlet. One end of the filter cartridge support body near the liquid outlet is provided with a liquid passage communicated with the liquid outlet. A plurality of openings communicated with the liquid passage are circumferentially arranged on the side wall of the filter cartridge support body. The pressure frame is arranged outside the filter cartridge support body, and the cylindrical filter screen is clamped between the filter cartridge support body and the pressure frame, and wrapped outside the openings.

[0009] Optionally, the pressing frame comprises two annular pressing rings, a plurality of pressing rods are fixedly connected between the two annular pressing rings, the two ends of the cylindrical filter screen are tightly pressed between the two annular pressing rings and the outer side wall of the filter core support body, and the plurality of openings are located between the two annular pressing rings.

[0010] Optionally, two bosses are fixedly connected on the outer side wall of the filter core support body, and the two bosses are located on the two sides of the two annular pressing rings, respectively.

[0011] Optionally, the outer shell comprises an inlet shell and an outlet shell, one end of the inlet shell is provided with the liquid inlet, the other end of the inlet shell is provided with a first groove in communication with the liquid inlet, one end of the outlet shell is provided with the liquid outlet, the other end of the outlet shell is provided with a second groove in communication with the liquid outlet, and the end of the outlet shell provided with the second groove extends into the first groove and is threadedly connected with the first groove.

[0012] Optionally, a sealing gasket is arranged between the end of the outlet shell provided with the second groove and the inner wall of the first groove.

[0013] Optionally, the end of the filter core support body close to the liquid outlet is threadedly connected with the second groove, and a gap is formed between the cylindrical filter screen and the side wall of the second groove.

[0014] The utility model discloses the following technical effects: fluid enters the inner chamber of the outer shell from the liquid inlet, and flows out from the liquid outlet after being filtered by the cylindrical filter screen, wherein the cylindrical filter screen is supported by the filter core framework inside and the pressing frame outside, so that the cylindrical filter screen maintains high support strength, the service life and reliability of the cylindrical filter screen are improved, and the cylindrical filter screen can be used stably for a long time in a high-pressure environment. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings constituting a part of the present application are used to provide further understanding of the present application, and the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0016] Figure 1 It is a structural schematic view of the utility model;

[0017] Figure 2 It is a structural schematic view of the filter core assembly in the utility model;

[0018] Figure 3 It is a structural schematic view of the filter core framework in the utility model;

[0019] Figure 4 It is the structure schematic view of the pressure frame in the utility model;

[0020] Figure 5 It is the structure schematic view of the inlet shell in the utility model;

[0021] Figure 6 It is the structure schematic view of the outlet shell in the utility model;

[0022] Figure 7 It is the structure schematic view of the sealing gasket in the utility model.

[0023] In the drawing: 100, inlet shell; 110, liquid inlet; 120, first groove; 200, outlet shell; 210, liquid outlet; 220, second groove; 300, filter element assembly; 310, element skeleton; 311, element support; 312, liquid channel; 313, opening; 314, boss; 320, pressure frame; 321, annular pressure ring; 322, pressure rod; 330, cylindrical filter screen; 400, sealing gasket. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more apparent, obvious and easy to understand, the utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0026] With reference to Figures 1-7 The utility model provides a kind of high-pressure fatigue-resistant filter, comprising:

[0027] Outer shell, the opposite two ends of outer shell are respectively provided with liquid inlet 110 and liquid outlet 210, and liquid inlet 110 and liquid outlet 210 are communicated with the inner cavity of outer shell respectively;

[0028] Filter element assembly 300, including element skeleton 310, cylindrical filter screen 330 and pressure frame 320, cylindrical filter screen 330 is arranged in the inner cavity of outer shell and covers in liquid outlet 210, and there is gap between the outer lateral wall of cylindrical filter screen 330 and the inner cavity lateral wall of outer shell;Element skeleton 310 is supported inside cylindrical filter screen 330 and is connected with the inner cavity of outer shell, and pressure frame 320 is supported outside cylindrical filter screen 330 and is connected with element skeleton 310, and cylindrical filter screen 330 is fixed between element skeleton 310 and pressure frame 320.

[0029] The cylindrical filter screen 330 can be, but is not limited to, using stainless steel mesh. In this embodiment, the material of the cylindrical filter screen 330 is 00Cr17Ni14Mo2 (ultra-low carbon austenitic stainless steel), with specifications of 0.05 / 0.036A and the execution standard is HB1862-93. The filter element frame 310 and the pressure frame 320 are made of stainless steel, which can be, but is not limited to, 304 stainless steel or 316L stainless steel.

[0030] Fluid enters the inner cavity of the outer casing through the inlet 110 and is filtered by the cylindrical filter screen 330. Impurities in the fluid are blocked by the cylindrical filter screen 330, and the filtered fluid flows out through the outlet 210. The cylindrical filter screen 330 is supported internally by the filter element skeleton 310 and externally by the pressure frame 320, which makes the cylindrical filter screen 330 maintain a high support strength, improves the service life and reliability of the cylindrical filter screen 330, and enables long-term stable use in high-pressure environments.

[0031] In some optional embodiments, the filter element frame 310 includes a filter element support 311, which is disposed in the inner cavity of the outer shell and covers the liquid outlet 210. The filter element support 311 has a liquid channel 312 communicating with the liquid outlet 210 at one end near the liquid outlet 210. The side wall of the filter element support 311 has a plurality of openings 313 communicating with the liquid channel 312. A pressure frame 320 is disposed outside the filter element support 311, and a cylindrical filter screen 330 is sandwiched between the filter element support 311 and the pressure frame 320. The cylindrical filter screen 330 is wrapped around the plurality of openings 313.

[0032] During filtration, the fluid passes sequentially through the cylindrical filter screen 330, the opening 313, and the liquid channel 312, and then flows out through the liquid outlet 210.

[0033] In some optional embodiments, the pressure frame 320 includes two annular pressure rings 321, and a plurality of pressure rods 322 are fixedly connected between the two annular pressure rings 321. The two ends of the cylindrical filter screen 330 are respectively pressed between the two annular pressure rings 321 and the outer wall of the filter element support 311. A plurality of openings 313 are located between the two annular pressure rings 321. Both ends of the annular pressure rings 321 and the cylindrical filter screen 330 are welded to the outer wall of the filter element support 311.

[0034] In some alternative embodiments, two protrusions 314 are fixed to the outer side wall of the filter element support 311. The two protrusions 314 are located on both sides of the two annular pressure rings 321, and the two annular pressure rings 321 are welded to the two protrusions 314 respectively.

[0035] The filter element support 311 is integrally formed with two protrusions 314. The shaft with several openings 313 on the filter element support 311 has a small size, thus forming protrusions 314 on both sides, which wrap around the filter element support 311. The cylindrical filter screen 330 is located between the two protrusions 314. Two annular pressure rings 321 press down on both ends of the cylindrical filter screen 330 respectively. The annular pressure rings 321, the two ends of the cylindrical filter screen 330 and the filter element support 311 are partially welded. The overlap length of the cylindrical filter screen 330 is required to be not less than 1mm and to avoid the openings 313 of the filter element support 311. Before welding, the welded parts are cleaned with gasoline and alcohol.

[0036] In this embodiment, the overlap length of the cylindrical filter screen 330 is 1.5mm.

[0037] Furthermore, after the cylindrical filter screen 330 is wrapped around the filter element support 311, it is pressed and spot-welded in place by an annular pressure ring 321. The annular pressure ring 321 must cover the overlap of the cylindrical filter screen 330 along the axial direction of the filter element support 311, and the cylindrical filter screen 330 must not be burned through during welding.

[0038] Furthermore, after the filter element assembly 300 is welded, it is necessary to inspect the filter element assembly 300 with a 10x magnifying glass, and it is required that there be no excess material in the interlayer between the filter element support 311 and the cylindrical filter screen 330.

[0039] Furthermore, after the filter element assembly 300 is welded, three pieces are randomly selected for use. The small rod undergoes a destructive test, requiring that the cylindrical filter screen 330 protrudes significantly without the weld seam falling off, ensuring a reliable weld and preventing failure during long-term use.

[0040] In some alternative embodiments, the outer shell includes an inlet shell 100 and an outlet shell 200. The inlet shell 100 has an inlet port 110 at one end and a first groove 120 communicating with the inlet port 110 at the other end. The outlet shell 200 has an outlet port 210 at one end and a second groove 220 communicating with the outlet port 210 at the other end. The end of the outlet shell 200 with the second groove 220 extends into the first groove 120 and is threadedly connected to the first groove 120. The first groove 120 and the second groove 220 together form the inner cavity of the outer shell. The filter element support 311 is disposed in the second groove 220.

[0041] Furthermore, the inlet housing 100 and the outlet housing 200 are made of stainless steel, which may be, but is not limited to, 304 stainless steel or 316L stainless steel; the inlet housing 100 and the outlet housing 200 are connected by threads, and the housing thickness is not less than 1mm. The specific thickness is determined by the fluid pressure and the inner diameter of the filter, as shown in Table 1.

[0042] Table 1

[0043]

[0044] In this embodiment, the inlet housing 100 and the outlet housing 200 are made of 316L stainless steel; the inlet housing 100 and the outlet housing 200 are connected by threads, the housing thickness is 2mm, the fluid pressure is 8MPa, and the filter inner diameter is 20mm.

[0045] In some alternative embodiments, a sealing gasket 400 is sandwiched between the end of the outlet housing 200 where the second groove 220 is formed and the inner wall of the first groove 120.

[0046] The sealing gasket 400 may be, but is not limited to, made of polytetrafluoroethylene (PTFE). All materials used in this application must be compatible with the fluid medium. The sealing gasket 400 is used for sealing to prevent leakage of high-pressure fluids.

[0047] In some alternative embodiments, the end of the filter element support 311 near the liquid outlet 210 is threadedly connected to the second groove 220, and there is a gap between the cylindrical filter screen 330 and the side wall of the second groove 220.

[0048] The assembly process is as follows:

[0049] Before assembly, all parts must be cleaned with gasoline and alcohol. First, screw the filter element assembly 300 into the outlet housing 200, making sure it is fully screwed in. Then, install the sealing gasket 400 onto the outlet housing 200. Finally, screw the inlet housing 100 onto the outlet housing 200. A suitable torque wrench must be used during the assembly process. No foreign objects are allowed inside the product cavity during the assembly process.

[0050] After assembly, the product needs to undergo airtightness and hydraulic strength tests: For the airtightness test, the product outlet end is plugged with a plug, the inlet end is filled with nitrogen at 1.5 times the fluid pressure, and then the product is immersed in water, requiring 3 minutes without any bubbles.

[0051] In this embodiment, the tightening torque is 25±5 N·m, and the inlet end is filled with nitrogen gas at 12 MPa.

[0052] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0053] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A high pressure fatigue resistant filter characterized by, The utility model relates to a filter cartridge assembly and a filter cartridge. The filter cartridge assembly comprises an outer shell, a filter cartridge support body, a cylindrical filter screen and a pressing frame. The filter cartridge support body is provided in the inner cavity of the outer shell and covers the liquid outlet.

2. The high pressure fatigue resistant filter of claim 1, wherein: The filter cartridge support body is provided with the pressing frame outside.

3. The high pressure fatigue resistant filter of claim 2, wherein: The pressing frame comprises two annular pressing rings.

4. The high pressure fatigue resistant filter of claim 3, wherein: The two annular pressing rings are fixedly connected with a plurality of pressing rods. The cylindrical filter screen is tightly pressed between the two annular pressing rings and the outer side wall of the filter cartridge support body. The annular pressing rings, the cylindrical filter screen and the filter cartridge support body are all welded with the outer side wall of the filter cartridge support body. The filter cartridge support body is provided with two bosses on the outer side wall. The two bosses are respectively located on the two sides of the two annular pressing rings. The two annular pressing rings are respectively welded with the two bosses.

5. The high pressure fatigue resistant filter of claim 2, wherein: The outer shell comprises an inlet shell (100) and an outlet shell (200), one end of the inlet shell (100) is provided with the liquid inlet (110), the other end is provided with a first groove (120) communicated with the liquid inlet (110), one end of the outlet shell (200) is provided with the liquid outlet (210), the other end is provided with a second groove (220) communicated with the liquid outlet (210), one end of the outlet shell (200) provided with the second groove (220) extends into the first groove (120) and is threadedly connected with the first groove (120), the first groove (120) and the second groove (220) form the inner cavity of the outer shell, and the filter core support (311) is arranged in the second groove (220).

6. The high pressure fatigue resistant filter of claim 5, wherein: The end of the outlet shell (200) provided with the second groove (220) and the inner wall of the first groove (120) are clamped with a sealing gasket (400).

7. The high pressure fatigue resistant filter of claim 5, wherein: One end of the filter core support (311) close to the liquid outlet (210) is threadedly connected with the second groove (220), and the cylindrical filter screen (330) has a gap with the sidewall of the second groove (220).

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