Oil supply pipe filter with bypass function

Abstract

The application discloses an oil supply pipeline filter with a bypass function and belongs to the technical field of filters. The filter comprises a cylinder with open ends, and a self-cleaning filter device with a first filter plate is arranged rotatably in the cylinder. A dirt collecting box is arranged below the cylinder, and the dirt collecting box is connected with the cylinder through a blowdown pipe and a reflux pipe. The blowdown pipe and the reflux pipe are connected with the cylinder at both sides of the self-cleaning filter device. The blowdown pipe and the reflux pipe are provided with stop valves. The single-cylinder filter with the bypass cleaning function is adopted, and the cost is lower than that of the double-cylinder parallel filter. The filter has the self-cleaning function, and the filtered solid particles can flow into the dirt collecting box through the self-cleaning means without stopping the machine. The dirt collecting box can be cleaned without stopping the machine.

Description

Technical Field

[0001] This application belongs to the field of filter technology, specifically relating to an oil supply pipeline filter with bypass function. Background Technology

[0002] In oil supply lines, filters, as key components ensuring system cleanliness, play an irreplaceable role in maintaining stable equipment operation and extending component lifespan. These devices are mainly used in industrial fields such as hydraulic systems, fuel injection systems, and high-pressure processing equipment. Their core function is to continuously filter out solid particulate contaminants entrained in the oil, preventing precision components from failing due to particle jamming or wear. Existing filters are mainly single-cylinder filters and parallel twin-cylinder filters, both of which have certain technical shortcomings.

[0003] A single-cylinder filter, where the system contains only a single filtration unit, allows oil to enter the cylinder through the inlet, pass through the filter element, and flow to the working components from the outlet. While this design is simple and low-cost, it has fundamental drawbacks in maintenance and cleaning. When the filter element reaches the end of its service life or becomes clogged and needs replacement, the oil supply line must be completely stopped, and the outer casing must be disassembled for filter element replacement or cleaning. For example, during continuous machining on a hydraulic machine tool, such downtime can disrupt the production process, potentially resulting in thousands of yuan in economic losses per hour. Furthermore, during disassembly, residual high-pressure oil inside the filter element is prone to leakage, polluting the working environment and increasing the cleaning burden. More critically, frequent system start-ups and shutdowns accelerate fatigue wear of hydraulic components, reducing the overall reliability of the system. Technical research indicates that system downtime during maintenance of single-cylinder filters accounts for approximately 15%-30% of the equipment's annual maintenance time, significantly impacting production efficiency.

[0004] To overcome the downtime drawbacks of single-tube filters, the industry has developed a dual-tube parallel filter system (also known as a "one-in-use, one-out-of-charge" system). This system uses two independent filter cartridges, with oil circuit switching achieved through a specially designed three-way valve. Under normal operating conditions, oil flows through the first filter cartridge (the main filter cartridge); when the main filter cartridge becomes clogged or requires cleaning, the valve switches to the standby filter cartridge, allowing maintenance of the main filter cartridge without interrupting the system's oil supply. While this solution solves the problem of continuous operation, it significantly increases costs compared to single-tube filters. Utility Model Content

[0005] The technical problem this application aims to solve is to overcome the shortcomings of existing technologies and provide an oil supply pipeline filter with a bypass function. This application uses a single-cylinder filter with a bypass cleaning function, which is less expensive than a dual-cylinder parallel filter. The filter has a self-cleaning function, and the filtered solid particles can flow into the sludge collection box through self-cleaning without stopping the machine. The sludge collection box can then be cleaned without stopping the machine.

[0006] The technical solution adopted by this application to solve its existing problems is:

[0007] An oil supply pipeline filter with bypass function includes a cylindrical body with open ends, and a self-cleaning filter device with a first filter plate is rotatably installed inside the cylindrical body.

[0008] A sludge collection box is located at the bottom of the cylinder. The sludge collection box is connected to the cylinder through a drain pipe and a return pipe. The drain pipe and the return pipe are connected to the cylinder at their respective points on both sides of the self-cleaning filter device.

[0009] The sewage pipe and return pipe are equipped with shut-off valves.

[0010] Preferably, the connection point between the drain pipe and the cylinder is located at the end of the self-cleaning filter device facing the oil inlet of the cylinder.

[0011] Preferably, the self-cleaning filter device includes a rotating shaft arranged coaxially with the cylinder, a first filter plate and blades are provided on the rotating shaft, and a number of inclined blades are arranged in a ring array around the axis of the rotating shaft. Two support frames are fixed inside the cylinder, and the two ends of the rotating shaft are rotatably connected to the two support frames respectively.

[0012] Preferably, the first filter plate is located at the oil inlet end of the cylinder, and the impeller is located at the oil outlet end of the cylinder.

[0013] Preferably, the first filter plate has a plurality of scrapers protruding from the end face opposite to the blade.

[0014] Preferably, several scrapers are arranged in a circular array around the axis of the rotating shaft, and the scrapers are arranged opposite to the through connection between the sewage tank and the cylinder.

[0015] Preferably, the outer end face of the scraper abuts against the inner wall of the cylinder.

[0016] Preferably, a sludge collection trough is recessed on the inner wall of the cylinder, and the sludge discharge pipe is connected to the sludge collection trough.

[0017] Preferably, the sludge collection box includes a box body with an open lower end, a limiting ring fixed to the inner wall of the box body, a second filter plate abutting below the limiting ring, and a bottom cover plate fixedly connected to the bottom of the second filter plate by a connecting rod, and the bottom cover plate being detachably connected to the box body.

[0018] Preferably, the bottom cover plate has a protruding insertion tube with threads on the outer wall of the insertion tube and a threaded groove on the inner wall of the box. The insertion tube is inserted into the box and the two are threadedly connected.

[0019] Compared with the prior art, the beneficial effects of this application are as follows:

[0020] (1) The single-tube layout is lower in cost than the double-tube parallel layout.

[0021] (2) The cylinder is equipped with a self-cleaning filter device, which can throw the filtered particles onto the inner wall of the cylinder by centrifugal force while filtering, and then scrape them into the drain pipe by scraper, thus achieving self-cleaning of the first filter plate.

[0022] (3) During the sewage discharge and cleaning process, it is only necessary to open the shut-off valve to control the oil flow into the sewage collection box, and then collect the sewage through the sewage collection box. During the cleaning of the sewage collection box, it is only necessary to close the shut-off valve, which will not affect the oil supply in the pipeline or the normal use of the filter. Attached Figure Description

[0023] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a first structural diagram of an oil supply pipeline filter with bypass function according to this application.

[0025] Figure 2 This is a second structural diagram of an oil supply pipeline filter with bypass function according to this application.

[0026] Figure 3 This is a first cross-sectional view of an oil supply pipeline filter with bypass function according to this application.

[0027] Figure 4 This is a second cross-sectional view of an oil supply pipeline filter with bypass function according to this application.

[0028] Figure 5 This is a first structural diagram of a self-cleaning filter device in an oil supply pipeline filter with bypass function according to this application.

[0029] Figure 6 This is a second structural diagram of a self-cleaning filter device in an oil supply pipeline filter with bypass function according to this application.

[0030] Figure 7 This is an exploded view of the sludge collection box in an oil supply pipeline filter with bypass function according to this application.

[0031] Figure 8 This is a cross-sectional view of the sludge collection box in an oil supply pipeline filter with bypass function according to this application.

[0032] In the diagram: 1-Cylinder, 101-Collection tank, 2-Support frame, 3-Self-cleaning filter device, 301-Rotating shaft, 302-First filter plate, 303-Scraper, 304-Paddle, 4-Drain pipe, 5-Stop valve, 6-Collection box, 601-Box body, 602-Limiting ring, 603-Second filter plate, 604-Connecting rod, 605-Bottom cover, 606-Insert pipe, 607-Handle, 7-Return pipe. Detailed Implementation

[0033] The attached figure shows a preferred embodiment of an oil supply pipeline filter with bypass function. The present application will be further described in detail below with reference to the attached figure.

[0034] Depend on Figures 1 to 8 As shown, an oil supply pipeline filter with bypass function includes a cylindrical body 1 with open ends. The ends of the cylindrical body 1 are provided with mounting flanges, which are connected in series with the oil supply pipeline. A self-cleaning filter device 3 with a first filter plate 302 is rotatably installed inside the cylindrical body 1. The first filter plate 302 is coaxially arranged with the cylindrical body 1, and the outer diameter of the first filter plate 302 is the same as the inner diameter of the cylindrical body 1.

[0035] In this embodiment, by Figure 5 as well as Figure 6 As shown, the self-cleaning filter device 3 includes a rotating shaft 301 arranged coaxially with the cylinder 1. The rotating shaft 301 is provided with a first filter plate 302 and a blade 304. Several inclined blades 304 are arranged in a ring array around the axis of the rotating shaft 301. Two support frames 2 are fixed inside the cylinder 1. The two ends of the rotating shaft 301 are rotatably connected to the two support frames 2 respectively.

[0036] The first filter plate 302 is located at the oil inlet end of the cylinder 1, and the impeller 304 is located at the oil outlet end of the cylinder 1. After the oil enters the cylinder 1, it is first filtered by the first filter plate 302, and then impacts the impeller 304. During the impact process, a lateral force is generated, which in turn drives the impeller 304 and the shaft 301 to rotate. Since the oil is filtered by the first filter plate 302 first, it does not contain particulate impurities, and there are no particulate objects impacting the impeller 304, thus improving the service life of the impeller 304.

[0037] The first filter plate 302 has several scrapers 303 protruding from its end face away from the impeller 304. These scrapers 303 are arranged in a circular array around the axis of the rotating shaft 301, and are positioned opposite to the connection points between the scrapers 303 and the drain tank 4 and the cylinder 1. The outer end faces of the scrapers 303 abut against the inner wall of the cylinder 1. A sludge collection box 6 is located below the cylinder 1, and is connected to the cylinder 1 via a drain pipe 4 and a return pipe 7. A shut-off valve 5 is installed on the drain pipe 4 and the return pipe 7. The connection points between the drain pipe 4 and the return pipe 7 and the cylinder 1 are located on opposite sides of the self-cleaning filter device 3, with the drain pipe 4 located at the end of the self-cleaning filter device 3 facing the oil inlet of the cylinder 1.

[0038] The scraper 303 is used in conjunction with the drain pipe 4. During the rotation of the self-cleaning filter device 3, the particles filtered on the first filter plate 302 are thrown outward under the action of centrifugal force, gradually approaching the inner wall of the cylinder 1, and then scraped into the drain pipe 4 by the scraper 303.

[0039] In order to facilitate the entry of filtered and trapped particles into the back drain pipe 4, a sludge collection groove 101 is recessed on the inner wall of the cylinder 1, and the drain pipe 4 is connected to the sludge collection groove 101.

[0040] Depend on Figure 7 as well as Figure 8 As shown, the sludge collection box 6 includes a box body 601 with an open bottom, and the bottom opening of the box body 601 is sealed by a detachably connected bottom cover plate 605.

[0041] A coaxially arranged limiting ring 602 is fixed to the inner wall of the box body 601. A second filter plate 603 abuts against the lower part of the limiting ring 602. The lower part of the second filter plate 603 is fixedly connected to the bottom cover plate 605 via a connecting rod 604. A tube 606 protrudes from the bottom cover plate 605. The outer wall of the tube 606 is threaded, and the inner wall of the box body 601 is threaded. The tube 606 is inserted into the box body 601, and the two are threaded together. A handle 607 is fixed to the bottom surface of the bottom cover plate 605 for easy removal.

[0042] The connection between the return pipe 7 and the box 601 is located on the top surface of the box 601, and the connection between the drain pipe 4 and the box 601 is located on the side wall of the box 601, in the area between the second filter plate 603 and the insertion pipe 606.

[0043] When sewage needs to be discharged, open both shut-off valves 5. Under the action of oil flow, the particles inside the sewage collection tank 101 will flow into the sewage collection box 6 and be intercepted by the second filter plate 603. After the shut-off valve 5 has reached the threshold time, close the shut-off valve 5, then remove the bottom cover plate 605 and remove the second filter plate 603 for cleaning.

[0044] Oil supply can be maintained throughout the entire sewage discharge and cleanup process.

[0045] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. An oil supply pipeline filter with bypass function, characterized in that: It includes a cylindrical body (1) with open ends, and a self-cleaning filter device (3) with a first filter plate (302) is rotatably installed inside the cylindrical body (1); A sludge collection box (6) is provided below the cylinder (1). The sludge collection box (6) is connected to the cylinder (1) through a drain pipe (4) and a return pipe (7). The drain pipe (4) and the return pipe (7) are connected to the cylinder (1) on both sides of the self-cleaning filter device (3). The drain pipe (4) and return pipe (7) are equipped with shut-off valves (5).

2. The oil supply pipeline filter with bypass function according to claim 1, characterized in that: The connection point between the drain pipe (4) and the cylinder (1) is located at the end of the self-cleaning filter device (3) facing the oil inlet of the cylinder (1).

3. The oil supply pipeline filter with bypass function according to claim 2, characterized in that: The self-cleaning filter device (3) includes a rotating shaft (301) arranged coaxially with the cylinder (1). The rotating shaft (301) is provided with a first filter plate (302) and blades (304). Several inclined blades (304) are arranged in a ring array around the axis of the rotating shaft (301). Two support frames (2) are fixed inside the cylinder (1). The two ends of the rotating shaft (301) are rotatably connected to the two support frames (2) respectively.

4. The oil supply pipeline filter with bypass function according to claim 3, characterized in that: The first filter plate (302) is located at the oil inlet end of the cylinder (1), and the impeller (304) is located at the oil outlet end of the cylinder (1).

5. An oil supply pipeline filter with bypass function according to claim 3 or 4, characterized in that: The first filter plate (302) has several scrapers (303) protruding from its end face away from the blade (304).

6. The oil supply pipeline filter with bypass function according to claim 5, characterized in that: Several scrapers (303) are arranged in a ring array around the axis of the rotating shaft (301), and the scrapers (303) are arranged opposite to the through connection between the sewage pipe (4) and the cylinder (1).

7. An oil supply pipeline filter with bypass function according to claim 6, characterized in that: The outer end face of the scraper (303) abuts against the inner wall of the cylinder (1).

8. An oil supply pipeline filter with bypass function according to claim 1, 2, 3, 4, 6, or 7, characterized in that: The inner wall of the cylinder (1) is recessed with a sludge collection trough (101), and the drain pipe (4) is connected to the sludge collection trough (101).

9. An oil supply pipeline filter with bypass function according to claim 8, characterized in that: The sludge collection box (6) includes a box body (601) with an open lower end. A limiting ring (602) is fixed on the inner wall of the box body (601) and is arranged coaxially. A second filter plate (603) is abutted below the limiting ring (602). A bottom cover plate (605) is fixedly connected below the second filter plate (603) through a connecting rod (604). The bottom cover plate (605) is detachably connected to the box body (601).

10. An oil supply pipeline filter with bypass function according to claim 9, characterized in that: The bottom cover plate (605) has a protruding insertion tube (606), the outer wall of the insertion tube (606) is threaded, the inner wall of the box body (601) is threaded, the insertion tube (606) is inserted into the box body (601), and the two are threadedly connected.

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