A double cylinder filter

Abstract

The utility model discloses a double cylinder filter, including filter cylinder, valve shell, valve rod, cam, valve core and connecting rod, still include guiding tape, the one side coaxial arrangement of valve core to the guiding cylinder has the guide portion, the middle part cylinder wall of guide portion is uniformly distributed with a plurality of oil holes on the circumference, the annular guiding tape slot is seted up to guiding tape outer wall outer end, guiding tape is installed in guiding tape slot, and guiding tape and the inner wall sliding contact of guiding cylinder.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a dual-cylinder filter. Background Technology

[0002] In aluminum foil rolling systems, rolling oil is used for lubrication and cooling. The rolling system requires high cleanliness of the rolling oil, leading to frequent filter cleaning, often requiring continuous operation to maintain or replace the filter element. This necessitates the use of a dual-cylinder filter, which allows switching between filter cylinders without shutting down the system, enabling cleaning or replacement of the filter element in the high-pressure cylinder.

[0003] However, the existing rolling oil supply system uses a dual-cylinder filter. If impurities remain on the outer wall of the guide cylinder or valve core, the valve core and the inner wall of the guide cylinder may collide during use, resulting in incomplete closure or damage to the seals by iron filings.

[0004] The utility model patent with announcement number CN216922674U discloses a three-position six-way manual reversing valve, which is used in a dual-cylinder filter. In this technical solution, multiple guide rods are arranged outward on the side wall of the piston. The guide rods are then guided into the central hole of the sealing seat. This guide rod guiding method is not stable and is prone to deflection, which causes the piston to not be able to smoothly enter the sealing seat port.

[0005] Utility model patent CN204004556U discloses a continuous flow three-way switching valve. In its technical solution, the valve core has three claws at its front end, which cooperate with a guide hole. This guiding method is unstable and prone to abrasion at the root of the valve core main plate.

[0006] Utility model patent CN211133216U discloses a dual-cylinder filter. In its technical solution, a circular guide portion is provided on the outer side of the rotating part of the valve core, and the guide portion fits into the valve port. Although it can guide the valve core and valve port well, the friction between the guide portion and the valve port is a sliding friction between steel materials. If a lack of oil occurs, it will greatly increase wear and widen the wear gap.

[0007] To overcome the above problems, a dual-cylinder filter is needed. Utility Model Content

[0008] The purpose of this invention is to provide a dual-cylinder filter in which the valve core can smoothly enter and exit the guide cylinder, reducing wear and jamming, and ensuring smooth switching of the dual-cylinder filter.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0010] This utility model relates to a dual-cylinder filter, comprising a filter cylinder, a valve housing, a valve stem, a cam, a valve core, and a connecting rod, and also includes a guide belt. The valve core has a guide portion coaxially arranged on the side facing the guide cylinder, and the guide portion has multiple oil passage holes evenly distributed around its central cylindrical wall. The outer end of the outer wall of the guide portion has an annular guide belt groove, and the guide belt is installed in the guide belt groove, with the guide belt in sliding contact with the inner wall of the guide cylinder.

[0011] This application for a dual-cylinder filter addresses the operational difficulties and jamming issues encountered during the actual use of existing equipment. The reason lies in the fact that the existing valve core cannot properly align with the guide cylinder, easily causing jamming and resulting in increased wear.

[0012] Furthermore, the guide strip is specifically made of polytetrafluoroethylene bronze composite material.

[0013] Furthermore, the outer wall of the valve core main plate is provided with a main sealing ring and an end sealing ring. The main sealing ring completes radial sealing, and the end sealing ring completes end face sealing.

[0014] Furthermore, the outer edge of the shaft section of the main sealing ring is provided with a chamfer.

[0015] Furthermore, the cam is mounted on the valve stem via a flat key, and the valve stem is fitted with axially limiting snap rings on the upper and lower sides of the cam.

[0016] Furthermore, the cam is provided with a roller on its protrusion. The roller is rotatably mounted in a groove on the outer wall of the protrusion via a spindle. The roller is arranged along the height direction of the cam and can roll to contact the inner wall of the valve core main plate.

[0017] Furthermore, the number of rollers is three; the three rollers are symmetrically arranged on the protrusion.

[0018] The roller is added to the outer contour of the cam. The low rolling friction resistance of the roller improves the situation of high resistance and difficulty in turning the handle during switching.

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

[0020] This utility model of a dual-cylinder filter features an annular guide groove on the outer end of the guide section, with a guide belt installed. The guide belt slides in contact with the inner wall of the guide cylinder, reducing the clearance and preventing jamming when the valve core's main plate blocks the port. It also reduces wear during sliding. The appropriate use of the guide belt material further reduces wear and extends the equipment's lifespan. In this dual-cylinder filter, the valve core can smoothly enter and exit the guide cylinder, reducing wear and jamming, and ensuring smooth switching between cylinders.

[0021] Furthermore, the sealing effect is significantly improved by adding two sealing lines, a main sealing ring and an end sealing ring, between the valve core and the guide cylinder port. The addition of a chamfer prevents hard impacts and jamming. The addition of retaining rings on the outer walls of the valve stem on both sides of the cam allows for cam disassembly and replacement. Rollers on the protruding part, which roll against the inner wall of the valve core main plate, transform the original sliding friction into rolling friction, reducing frictional resistance and preventing wear. Three rollers on the protruding part convert sliding friction resistance into rolling friction resistance at the most strenuous angle of valve stem operation, making operation easier and switching smoother. Marking the cam's orientation on the wheel disc helps operators determine if the valve is properly switched, preventing misalignment. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the main structure of the dual-cylinder filter of this utility model;

[0024] Figure 2 This is a schematic diagram of the front cross-sectional structure of the dual-cylinder filter of this utility model;

[0025] Figure 3 for Figure 2 A magnified schematic diagram of a portion of the central I section;

[0026] Figure 4 This is a schematic diagram of the main sectional view of the valve core part of this utility model;

[0027] Figure 5 This is a top view schematic diagram of the cam structure of this utility model.

[0028] Explanation of reference numerals in the attached drawings: 1. Filter cylinder; 101. Top cover; 102. Oil inlet connector; 2. Valve housing; 201. Guide cylinder; 202. External oil pipe connector; 203. Partition plate; 3. Valve stem; 301. Handle; 4. Cam; 401. Keyway; 402. Protrusion; 403. Roller; 404. Spindle; 5. Snap ring; 6. Flat key; 7. Valve core; 701. Main sealing ring; 702. End sealing ring; 703. Guide part; 704. Oil passage hole; 705. Guide groove; 706. Chamfer; 8. Guide band; 9. Connecting rod. Detailed Implementation

[0029] The core of this utility model is to provide a dual-cylinder filter, in which the valve core can smoothly enter and exit the guide cylinder, reducing wear and jamming, and ensuring smooth switching of the dual-cylinder filter.

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "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 simplifying the description, 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.

[0032] Refer to the attached diagram. Figure 1 This is a schematic diagram of the main structure of the dual-cylinder filter of this utility model; Figure 2 This is a schematic diagram of the front cross-sectional structure of the dual-cylinder filter of this utility model; Figure 3 for Figure 2 A magnified schematic diagram of a portion of the central I section; Figure 4 This is a schematic diagram of the main sectional view of the valve core part of this utility model; Figure 5 This is a top view schematic diagram of the cam structure of this utility model.

[0033] In one specific implementation, such as Figures 1-5As shown, this utility model of a dual-cylinder filter includes a filter cylinder 1, a valve housing 2, a valve stem 3, cams 4, valve cores 7, and connecting rods 9. Similar to existing dual-cylinder filters, two filter cylinders 1 are symmetrically arranged on both sides of the valve housing 2. Each filter cylinder 1 contains a filter element and has a detachable top cover 101. The filter cylinders 1 are connected to the flange plates on the guide cylinder 201 on the outer wall of the valve housing 2 via two oil inlets 102 at the top and bottom ends. The two valve cores 7 are arranged back-to-back and connected by multiple connecting rods 9, allowing the valve cores 7 to seal the ports of the guide cylinder 201. Two cams 4 are mounted on the valve stem 3 at corresponding heights to the valve cores 7 and can push the two valve cores 7 left and right to seal or open the ports of the guide cylinder 201. Two external oil pipe joints 202 are also provided on the outer wall of the valve housing 2, used to connect the rolling oil to be filtered and the filtered rolling oil to be output, respectively. A partition plate 203 is horizontally arranged in the middle of the inner cylinder of the valve housing 2 to separate the two sets of valve cores 7.

[0034] The important improvements of this novel dual-cylinder filter compared to existing technologies are as follows: Figure 3 and Figure 4 As shown, the dual-cylinder filter of this utility model also includes a guide belt 8. A guide portion 703 is coaxially arranged on the side of the valve core 7 facing the guide cylinder 201. The guide portion 703 is cylindrical, and multiple oil passage holes 704 are evenly distributed around the circumference of the central cylindrical wall of the guide portion 703. An annular guide belt groove 705 is opened at the outer end of the outer wall of the guide portion 703. The guide belt 8 is installed in the guide belt groove 705 around its entire circumference, and the guide belt 8 slides in contact with the inner wall of the guide cylinder 201. During normal operation, the guide belt 8 is always inside the guide cylinder 201 and will not come out from the port.

[0035] Specifically, such as Figure 4 The guide belt 8 is made of polytetrafluoroethylene bronze composite strip in strip shape, which has good wear resistance. At the interface, the ends are spliced ​​at a 45-degree bevel.

[0036] By creating an annular guide groove 705 on the outer end of the guide section 703 and installing a guide belt 8, the guide belt 8 slides in contact with the inner wall of the guide cylinder 201. This reduces the mating clearance, preventing jamming when the valve core 7's main board blocks the port, and also reduces wear during sliding. The appropriate use of the guide belt 8's material reduces wear and extends the equipment's service life. In this dual-cylinder filter, the valve core can smoothly enter and exit the guide cylinder, reducing wear and jamming, and ensuring smooth switching of the dual-cylinder filter.

[0037] In one specific embodiment of this utility model, such as Figures 2-5As shown, the outer wall of the main valve core 7 is provided with a main sealing ring 701 and an end sealing ring 702. The main sealing ring 701 is an O-ring and provides radial sealing. The end sealing ring 702 is a rectangular sealing gasket that provides end face sealing.

[0038] Specifically, such as Figure 4 As shown, the diameter of the mounting shaft section of the main sealing ring 701 is slightly larger than the outer diameter of the guide portion 703, thus reducing the mating clearance and achieving a better sealing effect. A chamfer 706 is provided at the outer edge of the shaft section of the main sealing ring 701.

[0039] By adding two sealing lines, a main sealing ring 701 and an end sealing ring 702, between the valve core 7 and the guide cylinder 201 port, the sealing effect is significantly improved. The addition of a chamfered angle 706 prevents hard impacts and jamming.

[0040] In one specific embodiment of this utility model, such as Figure 2 and Figure 3 As shown, the cam 4 is mounted on the valve stem 3 via a flat key 6, and the valve stem 3 is fitted with axially limiting snap rings 5 ​​on the upper and lower sides of the cam 4.

[0041] Specifically, such as Figure 2 As shown, the valve stem 3 is equipped with sealing rings at the top plate of the valve body 2 and the partition plate 203 to prevent the crossflow of rolling oil.

[0042] By adding snap rings 5 ​​on the outer walls of valve stems 3 on both the upper and lower sides of cam 4, cam 4 can be disassembled and replaced.

[0043] In one specific embodiment of this utility model, such as Figure 3 and Figure 5 As shown, the cam 4 has a roller 403 on its protrusion 402. The roller 403 is rotatably mounted in the groove on the outer wall of the protrusion 402 via a spindle 404. The roller 403 is arranged along the height direction of the cam 4 and can roll to contact the inner side wall of the main board of the valve core 7.

[0044] Specifically, such as Figure 5 As shown, there are three rollers 403; the three rollers 403 are symmetrically arranged on the protrusion 402.

[0045] Obviously, the number of rollers 403 can be greater, and they can be evenly spaced along the entire outer contour of the cam 4. Similar simple variations also fall within the protection scope of this utility model.

[0046] By setting rollers 403 on the protrusion 402, the rollers 403 roll in contact with the inner wall of the valve core 7 main board, improving the original sliding scraping friction to rolling friction, reducing frictional resistance, and thus avoiding wear. Setting three rollers 403 on the protrusion 402 can convert sliding frictional resistance into rolling frictional resistance at the most strenuous angle when actuating the valve stem 3, making operation easier and switching smoother.

[0047] In one specific embodiment of this utility model, the handle 301 at the top of the valve stem 3 can also be changed to a handwheel, and the handwheel disc is marked with the orientation of the protrusion 402 of the cam 4.

[0048] By marking the orientation of cam 4 on the wheel, operators can easily determine whether it has been switched to the correct position, thus avoiding misalignment during rotation.

[0049] In this embodiment, the dual-cylinder filter is used as follows: When the oil pressure difference of one filter cylinder 1 exceeds the set range, it indicates that the filter element in this filter cylinder 1 is severely clogged. In this case, it is necessary to switch to the other filter cylinder 1. After the operator releases air and balances the oil pressure, they turn the handle 301, which rotates the valve stem 3 180 degrees. The cam 4 follows the 180-degree rotation, and the protrusion 402 gradually detaches from the inner wall of the main valve core 7 on one side and contacts the inner wall of the main valve core 7 on the other side. The outer roller 403 first rolls and contacts the inner wall of the main valve core 7, followed by the middle roller 403, continuously pushing the main valve core 7 forward during this process. The guide belt 8 slides in contact with the inner wall of the guide cylinder 201, and the main sealing ring 701 and the end sealing ring 702 abut against the original oil-guiding port of the guide cylinder 201, completing a double-line seal, thus sealing the original oil-guiding channel. At the same time, due to the pulling action of the connecting rod 9, the main plate of the valve core 7 and the port of the spare guide cylinder 201 on the other side open, and the rolling oil passes through the oil passage 704. This completes the switching of the working state of the two filter cylinders 1. At this time, the oil draining and filter element replacement operations are performed on the filter cylinder 1 that was previously clogged.

[0050] In summary, this utility model of a dual-cylinder filter, by creating an annular guide groove 705 at the outer end of the outer wall of the guide section 703 and installing a guide belt 8, allows the guide belt 8 to slide in contact with the inner wall of the guide cylinder 201. This reduces the mating clearance, preventing jamming when the valve core 7's main board seals the port, and also reduces wear during the sliding process. The appropriate use of the guide belt 8 material reduces wear and extends the service life of the equipment. In this utility model of a dual-cylinder filter, the valve core can smoothly enter and exit the guide cylinder, reducing wear and jamming, and ensuring smooth switching of the dual-cylinder filter. Furthermore, by adding two sealing lines, a main sealing ring 701 and an end sealing ring 702, between the valve core 7 and the port of the guide cylinder 201, the sealing effect is significantly improved. The addition of a chamfered angle 706 prevents hard jamming. The addition of a retaining spring 5 on the outer wall of the valve stem 3 on both sides of the cam 4 allows for the disassembly and replacement of the cam 4. By installing rollers 403 on the protrusion 402, the rollers 403 roll in contact with the inner wall of the valve core 7 main board, transforming the original sliding scraping friction into rolling friction, reducing frictional resistance and thus preventing wear. Installing three rollers 403 on the protrusion 402 converts sliding friction resistance into rolling friction resistance at the most strenuous angle when actuating the valve stem 3, making operation easier and switching smoother. Marking the orientation of the cam 4 on the wheel disc helps operators determine if the valve is properly switched, preventing misalignment.

[0051] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0052] 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 dual-cylinder filter, comprising a filter cylinder (1), a valve housing (2), a valve stem (3), a cam (4), a valve core (7), and a connecting rod (9), characterized in that, It also includes a guide belt (8), and a guide part (703) is coaxially provided on the side of the valve core (7) facing the guide cylinder (201). Multiple oil passage holes (704) are evenly distributed on the circumference of the middle cylindrical wall of the guide part (703). An annular guide belt groove (705) is opened at the outer end of the outer wall of the guide part (703). The guide belt (8) is installed in the guide belt groove (705) and the guide belt (8) slides in contact with the inner wall of the guide cylinder (201).

2. The dual-cylinder filter according to claim 1, characterized in that: The guide strip (8) is specifically made of polytetrafluoroethylene bronze composite material.

3. The dual-cylinder filter according to claim 1, characterized in that: The outer side wall of the main body of the valve core (7) is provided with a main sealing ring (701) and an end sealing ring (702). The main sealing ring (701) completes radial sealing, and the end sealing ring (702) completes end face sealing.

4. The dual-cylinder filter according to claim 3, characterized in that: The main sealing ring (701) has a chamfer (706) at the outer edge of the shaft section.

5. The dual-cylinder filter according to claim 1, characterized in that: The cam (4) is mounted on the valve stem (3) via a flat key (6), and the valve stem (3) is fitted with axially limiting snap rings (5) on the upper and lower sides of the cam (4).

6. The dual-cylinder filter according to claim 5, characterized in that, The cam (4) has a roller (403) on its protrusion (402). The roller (403) is rotatably mounted in the groove on the outer wall of the protrusion (402) via a spindle (404). The roller (403) is arranged along the height direction of the cam (4). The roller (403) can roll and contact the inner wall of the main board of the valve core (7).

7. The dual-cylinder filter according to claim 6, characterized in that: The number of rollers (403) is three; the three rollers (403) are symmetrically arranged on the protrusion (402).

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