Magnetic filter for non-backpressure clogging alarm

Abstract

The utility model relates to the technical field of magnetic filters, and discloses a non-backpressure magnetic filter capable of alarming when being blocked. The magnetic filter comprises a filter cylinder, a medium inlet and an overflow port are formed in the filter cylinder, the medium inlet is formed in the outer side of a top plate of an oil tank, and the overflow port is formed in the inner side of the top plate of the oil tank; the top end of the filter cylinder is provided with a filter top cover, and the tail end of the filter cylinder is provided with a filter element assembly for filtering iron slag and scrap iron; and a liquid level switch extending into the inner cavity of the filter cylinder is mounted on the filter top cover and is provided with an alarm device. The filter comprises the filter cylinder, the permanent magnet assembly, the filter screen, the liquid level switch and other elements, hydraulic oil or lubricating oil enters from the medium inlet and passes through the permanent magnet assembly and the filter screen, iron slag and iron scrap can be filtered out by the permanent magnet assembly and the filter screen, and filtering is more sufficient; meanwhile, after the magnetic filter is blocked, the liquid level switch is triggered to give an alarm, the filter element can be cleaned in time, and the system safety is protected.

Description

Technical Field

[0001] This utility model relates to the field of magnetic filter technology, and in particular to a magnetic filter for use in alarming when there is no back pressure. Background Technology

[0002] Magnetic filters used in oil tanks are primarily applied to the drain ports of hydraulic motors in lubrication systems such as gearboxes or hydraulic systems. These systems are either back-pressure-free or rely on gravity for oil return. Since wear or damage to gearboxes or hydraulic motors generates iron slag and metal filings, which can pose a significant hazard to the entire system, filtering these iron slag and metal filings in hydraulic or lubrication systems is crucial for equipment safety.

[0003] The magnetic filters currently used in fuel tanks mainly consist of magnetic rods and filter baskets, but these filtration devices have the following drawbacks:

[0004] (1) Magnetic rods: When using magnetic rods, several magnetic rods need to be inserted into the oil return pipe in the oil tank. This method cannot completely filter hydraulic oil or lubricating oil, nor can it determine whether the magnetic rods need to be cleaned. The filtering effect cannot be guaranteed.

[0005] (2) Filter basket: When using a filter basket, the oil return chamber needs to be designed in the oil tank for installing the filter basket. The oil tank structure becomes complicated and is also limited by space. At the same time, it is impossible to determine whether the filter basket is blocked. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a magnetic filter with a blockage alarm without back pressure. The integrated magnetic filter structure achieves more thorough oil filtration, better effect, no back pressure, blockage alarm, and better space utilization.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] A magnetic filter for a back pressure-free clogging alarm, installed on the top plate of an oil tank and used to filter iron filings in the filter medium, includes a filter cylinder that passes through the top plate of the oil tank, and the filter cylinder has a medium inlet and an overflow outlet. The medium inlet is located on the outside of the top plate of the oil tank, and the overflow outlet is located on the inside of the top plate of the oil tank.

[0009] The top of the filter cylinder is equipped with a filter top cover, and the bottom of the filter cylinder is equipped with a filter element assembly for filtering iron slag and iron filings.

[0010] The filter top cover is equipped with a liquid level switch that extends into the inner cavity of the filter cylinder, and the liquid level switch has an alarm device.

[0011] Furthermore, the inner surface of the filter top cover is provided with an oil return baffle, the end of which is positioned below the medium inlet. The medium inlet and overflow outlet are located on opposite sides of the oil return baffle. The oil return baffle not only serves to guide the flow but also prevents the backflow of medium from impacting the level switch and causing false alarms.

[0012] Furthermore, the filter element assembly includes a filter screen cylinder installed at the end of the filter cylinder body. A filter screen base plate is provided at the bottom of the filter screen cylinder body, and a pull rod is installed on the upper surface of the filter screen base plate, running through the entire filter screen cylinder body. Multiple permanent magnet assemblies, distributed vertically, are sleeved on the pull rod. Compared to a single magnetic rod, multiple permanent magnet assemblies can significantly increase the adsorption area for iron slag and iron filings, further improving the filtration efficiency of iron slag and iron filings. In addition, if one permanent magnet assembly is damaged, it will not affect the use of the other permanent magnet assemblies.

[0013] Furthermore, the liquid level switch is equipped with a liquid level sensing component at its end, which is used to sense the liquid level of the medium, thereby further improving the accuracy and timeliness of the liquid level switch.

[0014] Furthermore, the filter housing is mounted on the top plate of the oil tank via a filter mounting bracket.

[0015] Furthermore, the permanent magnet assembly includes a permanent magnet block, with pads provided on the upper and lower surfaces of the permanent magnet block, and both the permanent magnet block and the pads are sleeved on the pull rod.

[0016] Furthermore, the two adjacent permanent magnet assemblies are separated by washers. A magnetic field channel is formed between the two permanent magnet assemblies, further improving the performance of adsorbing iron slag and iron filings.

[0017] Furthermore, the filter cylinder is provided with a handle at the upper end, and the handle is connected to the pull rod.

[0018] Furthermore, the end of the liquid level sensing component is positioned below the overflow port. When the liquid level sensing component detects a change in the medium level, it issues an alarm, and excess medium flows out from the overflow port, preventing excessive medium from accumulating in the filter cartridge.

[0019] Furthermore, the gasket includes a gasket body sleeved on the pull rod, and the outer edge of the gasket body is uniformly provided with protrusions.

[0020] Furthermore, the upper end of the filter cylinder is provided with an annular handle mounting base, with both ends of the handle connected to the handle mounting base and the middle of the handle connected to the pull rod. The handle, handle mounting base, and pull rod cooperate with each other to make the filter element assembly a whole, which is convenient for disassembly and replacement.

[0021] The beneficial effects of this utility model are as follows: This utility model is reasonably designed and has the following advantages:

[0022] (1) The present invention has a compact and reasonable structure and is suitable for hydraulic or lubrication systems without back pressure or relying on gravity for oil return.

[0023] (2) This utility model includes a filter cylinder, a permanent magnet block assembly, a filter screen, a liquid level switch and other components. Hydraulic oil or lubricating oil enters through the medium inlet and passes through the permanent magnet assembly and the filter screen. Iron slag and iron filings will be filtered out by the permanent magnet assembly and the filter screen, making the filtration more thorough. At the same time, the liquid level switch will trigger an alarm when the magnetic filter is clogged, which can clean the filter element in time and protect the safety of the system.

[0024] (3) The handle, handle mounting base and pull rod work together to make the filter element assembly a whole, which is easy to disassemble and replace. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of Example 1;

[0027] Figure 2 yes Figure 1 A structural diagram from another perspective;

[0028] Figure 3 yes Figure 1 Top view;

[0029] Figure 4 yes Figure 3 Sectional view along the middle AA direction;

[0030] Figure 5 This is a schematic diagram of the filter element assembly in Example 1;

[0031] Figure 6 yes Figure 5 Top view.

[0032] In the diagram: 1. Top plate of oil tank, 2. Filter cylinder, 3. Medium inlet, 4. Overflow port, 5. Liquid level switch, 6. Filter top cover, 7. Oil return baffle, 8. Filter screen cylinder, 9. Filter screen bottom plate, 10. Filter mounting base, 11. Pull rod, 12. Permanent magnet, 13. Gasket, 14. Washer, 15. Handle, 16. Handle mounting base, 51. Liquid level sensing component. Detailed Implementation

[0033] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application. As used herein, the singular form includes the plural form unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this description, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] Example 1

[0037] like Figures 1-6 The magnetic filter shown is used for clogging alarm without back pressure. The arrow indicates the direction of medium flow. It is installed on the top plate 1 of the oil tank and is used to filter iron filings in the medium. It includes a filter cylinder 2 that passes through the top plate 1 of the oil tank. The filter cylinder 2 has a medium inlet 3 and an overflow port 4. The medium inlet 3 is located on the outside of the top plate 1 of the oil tank, and the overflow port 4 is located on the inside of the top plate 1 of the oil tank. A filter top cover 6 is installed at the top of the filter cylinder 2, and a filter element assembly for filtering iron filings is provided at the end of the filter cylinder 2. A liquid level switch 5 that extends into the inner cavity of the filter cylinder 2 is installed on the filter top cover 6. The liquid level switch 5 has an alarm device.

[0038] The inner surface of the filter top cover 6 is provided with an oil return baffle 7. The end of the oil return baffle 7 is set below the medium inlet 3. The medium inlet 3 and the overflow port 4 are respectively located on both sides of the oil return baffle 7.

[0039] The liquid level switch 5 is equipped with a liquid level sensing component 51 at its end. The end of the liquid level sensing component 51 is set below the overflow port 4; the filter cylinder 2 is mounted on the top plate 1 of the oil tank through the filter mounting base 10.

[0040] The filter cartridge assembly includes a filter screen cylinder 8 installed at the end of the filter cylinder 2. A filter screen base plate 9 is located at the bottom of the filter screen cylinder 8. A pull rod 11, running through the entire filter screen cylinder 8, is installed on the upper surface of the filter screen base plate 9. Multiple permanent magnet assemblies, distributed vertically, are mounted on the pull rod 11. Adjacent permanent magnet assemblies are separated by washers 14. Both the filter screen cylinder 8 and the filter screen base plate 9 use 80-mesh filter screens.

[0041] The permanent magnet assembly includes a permanent magnet block 12, with gaskets 13 on its upper and lower surfaces. Both the permanent magnet block 12 and the gaskets 13 are fitted onto the pull rod 11. Each gasket 13 includes a main body fitted onto the pull rod 11, with evenly distributed protrusions along its outer edge. The permanent magnet block 12 ensures that the pull rod 11, gaskets 13, and washers 14 all possess a magnetic field, significantly increasing the adsorption area for iron slag and iron filings, and further improving the filtration efficiency of iron slag and iron filings.

[0042] The filter cylinder 8 has a handle 15 at its upper end, which is connected to the pull rod 11. The filter cylinder 8 also has an annular handle mounting seat 16 at its upper end. Both ends of the handle 15 are connected to the handle mounting seat 16, and the middle of the handle 15 is connected to the pull rod 11. The handle 15, handle mounting seat 16, and pull rod 11 cooperate to make the filter element assembly a single unit, facilitating disassembly and replacement.

[0043] The working process of this magnetic filter used for back pressure-free clogging alarms is as follows:

[0044] The medium to be treated, which is returned from equipment such as gearbox or hydraulic motor, enters the filter cylinder 2 through the medium inlet 3. After passing through the oil return baffle 7, it falls into the filter element assembly at the end of the filter cylinder 2. The permanent magnet assembly causes the filter element assembly to generate a medium-strong magnetic field. The iron slag and iron filings in the medium to be treated are adsorbed on the permanent magnet assembly. The filter screen cylinder 8 and the filter screen bottom plate 9 perform secondary filtration on the medium to be treated. After filtration, the medium enters the oil tank.

[0045] After prolonged use, the filter element assembly will become clogged, causing the liquid level inside the filter element assembly to rise. As the liquid level continues to rise, it enters the filter housing 2. When the liquid level rises to the alarm line height (i.e., when the liquid level sensing component 51 senses the liquid level), it triggers the liquid level switch 5 on the filter and sends an alarm signal to notify the central control room that the magnetic filter is clogged and needs to be replaced in time. If the liquid level inside the filter housing 2 continues to rise, it will flow back to the oil tank through the overflow port 4 on the filter housing 2 to prevent back pressure from causing system failure.

[0046] In addition, the filter assembly is equipped with a handle 15. When the filter assembly needs to be replaced, simply hold the handle 15 to remove the entire filter assembly, making disassembly and replacement easier.

[0047] In summary, this utility model is reasonably designed and has the following advantages:

[0048] (1) The present invention has a compact and reasonable structure and is suitable for hydraulic or lubrication systems without back pressure or relying on gravity for oil return.

[0049] (2) This utility model includes a filter cylinder 2, a permanent magnet block assembly, a filter screen, a liquid level switch 5 and other components. Hydraulic oil or lubricating oil enters through the medium inlet and passes through the permanent magnet assembly and the filter screen. Iron slag and iron filings will be filtered out by the permanent magnet assembly and the filter screen, making the filtration more thorough. At the same time, the liquid level switch 5 will be triggered to alarm when the magnetic filter is clogged, so that the filter element can be cleaned in time and the system safety can be protected.

[0050] (3) The handle 15, handle mounting base 16 and pull rod 11 work together to make the filter element assembly a whole, which is easy to disassemble and replace.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A magnetic filter for a back pressure-free clogging alarm, mounted on the top plate (1) of an oil tank and used to filter iron filings in the filter medium, characterized in that: Includes a filter cylinder (2) that passes through the top plate (1) of the oil tank. The filter cylinder (2) has a medium inlet (3) and an overflow port (4). The medium inlet (3) is located on the outside of the top plate (1) of the oil tank, and the overflow port (4) is located on the inside of the top plate (1) of the oil tank. The filter cylinder (2) is equipped with a filter top cover (6) at the top and a filter element assembly for filtering iron slag and iron filings at the end. The filter top cover (6) is equipped with a liquid level switch (5) that extends into the inner cavity of the filter cylinder (2), and the liquid level switch (5) has an alarm device.

2. A magnetic filter for a back pressure-free, clog-prone alarm according to claim 1, characterized in that: The filter top cover (6) has an oil return baffle (7) on its inner surface. The end of the oil return baffle (7) is set lower than the medium inlet (3). The medium inlet (3) and the overflow port (4) are respectively located on both sides of the oil return baffle (7).

3. A magnetic filter for a back pressure-free, clog-prone alarm according to claim 1, characterized in that: The filter element assembly includes a filter screen cylinder (8) installed at the end of the filter cylinder (2). The bottom of the filter screen cylinder (8) is provided with a filter screen base plate (9). A pull rod (11) that runs through the entire filter screen cylinder (8) is installed on the upper surface of the filter screen base plate (9). Multiple permanent magnet assemblies distributed vertically are sleeved on the pull rod (11).

4. A magnetic filter for a back pressure-free, clog-prone alarm according to claim 1, characterized in that: The liquid level switch (5) is provided with a liquid level sensing component (51) at its end.

5. A magnetic filter for a back pressure-free, clog-prone alarm according to claim 1, characterized in that: The filter cylinder (2) is mounted on the top plate (1) of the oil tank via the filter mounting base (10).

6. A magnetic filter for a back pressure-free, clog-prone alarm according to claim 3, characterized in that: The permanent magnet assembly includes a permanent magnet block (12), and the upper and lower surfaces of the permanent magnet block (12) are respectively provided with pads (13). The permanent magnet block (12) and the pads (13) are both sleeved on the pull rod (11).

7. A magnetic filter for a back pressure-free, clog-prone alarm according to claim 3, characterized in that: The two adjacent permanent magnet components are separated by a washer (14).

8. A magnetic filter for a back pressure-free, clog-prone alarm according to claim 3, characterized in that: The filter cylinder (8) is provided with a handle (15) at the upper end, and the handle (15) is connected to the pull rod (11).

9. A magnetic filter for a back pressure-free, clog-prone alarm according to claim 4, characterized in that: The liquid level sensing component (51) is positioned below the overflow port (4) at its end.

10. A magnetic filter for a back pressure-free, clog-prone alarm according to claim 6, characterized in that: The gasket (13) includes a gasket body sleeved on the pull rod (11), and the outer edge of the gasket body is uniformly provided with protrusions.

11. A magnetic filter for a back pressure-free, clog-prone alarm according to claim 8, characterized in that: The filter cylinder (8) is provided with an annular handle mounting seat (16) at the upper end. The two ends of the handle (15) are connected to the handle mounting seat (16), and the middle part of the handle (15) is connected to the pull rod (11).

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