Filter with leakage monitoring and alarming functions and monitoring method thereof

Abstract

The invention belongs to the technical field of filters, and discloses a filter with leakage monitoring and alarming functions and a monitoring method thereof.The filter comprises a filter assembly, the filter assembly comprises a metal shell, the top end of the metal shell fixedly communicates with a liquid inlet, and a filter element is fixedly installed on the outer side face of the metal shell; an extension frame is fixedly installed on one side of the outer side face of the metal shell, and a lateral guide rail is installed in the middle of the extension frame. By utilizing the oil flow increased within a short time during leakage, the pressure change can be converted into the displacement of the permanent magnet through the change of the flow, the action of the alarm assembly and the external Hall current sensor, and the displacement of the permanent magnet is converted into the current change, so that the rapid monitoring process is realized; the whole monitoring process is quick in response, meanwhile, leakage points can be quickly captured through rotation of the movable ring, quick monitoring is achieved, filtering failures are reduced, and the service life is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of filters, and in particular relates to a filter with a leakage monitoring and alarm function and a monitoring method thereof. Background Art

[0002] Filters are key equipment used in the industrial field to handle impurities in liquids or gases. They are designed to meet the needs of large flow and high-precision filtration, and are widely used in water treatment, energy, chemical and other industries. Filters are mainly divided into large filters and small filters according to their volume. Large filters mainly rely on physical interception and material adsorption to separate impurities. They are usually filled with multiple layers of filter materials such as activated carbon, quartz sand, and ceramsite. When water or air flows through, pollutants such as suspended particles, organic matter, and heavy metals are trapped in the pores of the filter material, and the clean medium flows out through the filter layer.

[0003] When the filter is working, it mainly achieves filtration through the filter medium. During normal operation, since the filter flow rate at the filter cutoff is basically the same, the filter flow rate is in a constant state. However, once the filter medium leaks, it will cause an instantaneous increase in flow rate, causing damage to the device. At the same time, some impurities will overflow and cause filtration failure. Therefore, how to maintain leakage monitoring is crucial.

[0004] When the filter is actually used, if a small leak occurs, the small amount of leakage will not cause a major impact on the entire system or device. However, once a larger-scale leak occurs, the instantaneous flow rate will increase instantly, causing a surge in pressure in the entire device. The devices currently used do not monitor larger leaks and have poor safety. Summary of the invention

[0005] The object of the present invention is to provide a filter with leakage monitoring and alarm function and a monitoring method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a filter with a leakage monitoring and alarm function, comprising a filter assembly, the filter assembly comprising a metal shell, the top end of the metal shell is fixedly connected to a liquid inlet, a filter element is fixedly installed on the outer side of the metal shell, an extension frame is fixedly installed on one side of the outer side of the metal shell, a lateral guide rail is installed in the middle of the extension frame, a power assembly is movably sleeved inside the lateral guide rail, a movable ring is movably sleeved on the outer side of the filter element, a driven gear ring is fixedly installed on the bottom end of the movable ring, the driven gear ring is meshedly connected to the power assembly, the outer side of the movable ring is movably connected to the power assembly, the movable ring rotates relative to the power assembly, one side of the movable ring is fixedly connected to an alarm assembly, an adjusting screw is movably installed inside the lateral guide rail, and the adjusting screw is threadedly connected to the power assembly.

[0007] Before use, the liquid inlet must be connected to the filter port of the device, and the filter element must be ensured to be free of blockage. During normal filtration, the oil can enter the filter element through the liquid inlet and be filtered through the filter element. The filtered oil can be discharged through the outer side of the filter element. At the same time, when conducting leakage monitoring, the adjusting screw can be manually turned according to the position to be monitored, driving the power assembly as a whole to move up and down relative to the lateral guide rail, and synchronously driving the movable ring to move up and down until the movable ring is located on the outer side of the position to be monitored at the filter element, thereby completing the adjustment of the monitoring position, and the bottom end of the adjusting screw can be connected to an external motor, and the adjusting screw can be driven by the external motor to rotate in real time to complete the real-time adjustment of the position of the movable ring.

[0008] As a further technical solution of the present invention, the alarm assembly includes an adjusting tube, the bottom end of the adjusting tube is fixedly connected to a liquid inlet pipe, the bottom end of the liquid inlet pipe is connected to the top of the movable ring, the internal movable sleeve of the adjusting tube is connected to a piston plate, and the top end of the piston plate is fixedly installed with a piston rod located inside the adjusting tube.

[0009] As a further technical solution of the present invention, an alarm tube is fixedly installed on the top of the regulating tube, and the top of the piston rod sequentially penetrates the top of the regulating tube and the bottom of the alarm tube and is fixedly connected to a permanent magnet located inside the piston rod.

[0010] As a further technical solution of the present invention, the outer side surface of the piston rod is movably sleeved with a limit spring, the upper and lower ends of the limit spring are respectively connected to the top of the inner cavity of the adjusting tube and the bottom end of the piston plate, and a return pipe is fixedly connected to the outer side surface of the adjusting tube near the top, and the other end of the return pipe is connected to the outer side surface of the movable ring.

[0011] As a further technical solution of the present invention, a copper coil is fixedly installed in the inner cavity of the alarm tube near the top, a touch switch is fixedly installed at the top of the inner cavity of the alarm tube, an alarm is fixedly installed in the middle of the top of the alarm tube, the output end of the touch switch is connected to the input end of the alarm, and the output end of the copper coil is connected to an external Hall current sensor.

[0012] When a small leak occurs in the filter element, the flow entering the movable ring will be greater than the constant flow, and part of the oil will enter the liquid inlet pipe through the top of the movable ring, and at the same time enter the inside of the regulating pipe, and exert an upward thrust on the piston plate. At this time, the piston plate and the piston rod will move upward accordingly, and the limit spring can be compressed, driving the permanent magnet to move upward.

[0013] As a further technical solution of the present invention, when the limit spring is in an extreme compression state, the piston plate is at the highest point, and the piston plate is located above the output end of the reflux pipe, the permanent magnet is in contact with the touch switch, and a one-way valve is installed inside the liquid inlet pipe and the reflux pipe, and the directions of the valves are inward conduction and outward blockage and outward conduction and inward blockage respectively.

[0014] When the leakage point is too large, the instantaneous flow rate will increase significantly, and the flow rate entering the regulating tube will also increase significantly. At this time, the limit spring can be compressed to the limit position, and the permanent magnet rises to the highest point until it contacts the touch switch. At this time, the power supply of the alarm is turned on, and the alarm sounds an alarm to indicate a large-scale leakage.

[0015] By further utilizing the changes in oil during leakage, that is, utilizing the sudden change in pressure during large-scale leakage to achieve the upward displacement of the permanent magnet, and utilizing its extreme displacement position to trigger the touch switch, the entire process can be completed automatically, and large-scale leakage can be monitored in the first time, significantly improving safety and reducing losses.

[0016] At the same time, when the pressure at the leakage point decreases or the leakage point is dealt with, part of the oil can flow back through the reflux pipe and re-enter the interior of the movable ring. At the same time, the limit spring can automatically reset, driving the piston plate to automatically reset. At this time, the permanent magnet is no longer located inside the copper coil, that is, it no longer cuts its magnetic field, and the device is reset until the leakage point is detected again.

[0017] By further utilizing the oil pressure, that is, when the device restores normal flow, the oil flow is in a constant state, and with the action of the alarm component, the alarm component can be automatically reset. The entire process can be completed automatically and continuous monitoring can be maintained without the need for maintenance operations. All-weather monitoring of the device can be achieved, thereby improving monitoring efficiency.

[0018] As a further technical solution of the present invention, the power assembly includes a mounting frame, an extension card block is fixedly installed on one side of the mounting frame, the extension card block is movably connected to the lateral guide rail, the extension card block is displaced up and down relative to the lateral guide rail, and the middle part of the extension card block is threadedly connected to the adjusting screw.

[0019] As a further technical solution of the present invention, a main motor is fixedly installed on the bottom end of the mounting frame, a driving gear is fixedly installed on the output shaft of the main motor, the driving gear is meshingly connected with the driven gear ring, a synchronous plate is movably sleeved on the output shaft of the main motor, the other end of the synchronous plate is movably connected to the movable ring, and the movable ring rotates relative to the synchronous plate.

[0020] When monitoring the leakage on the outer side of the filter element, the main motor can be started to drive the driving gear at the bottom to rotate. At this time, the driven gear ring on the side of the driving gear rotates synchronously and drives the movable ring at the top to rotate relative to the filter element. At this time, the movable ring can rotate around the monitoring position until a point at the monitoring position leaks, and the oil flow entering the movable ring increases accordingly. When the oil flow increases, that is, when the permanent magnet moves upward, the permanent magnet extends into the interior of the copper coil and cuts the magnetic field inside the copper coil. The copper coil then generates an induced current and transmits it to the external Hall current sensor. The sensor then operates, indicating that a leak has occurred at the monitoring location, and the monitoring process is completed.

[0021] By utilizing the oil flow rate that increases in a short period of time during leakage, through the change in flow rate, in conjunction with the action of the alarm component and an external Hall current sensor, the pressure change can be converted into the displacement of the permanent magnet, and the displacement of the permanent magnet can be converted into current change, thereby achieving a rapid monitoring process. The entire monitoring process responds quickly, and the rotation of the movable ring can also quickly capture the leakage point, achieving rapid monitoring, thereby reducing filtration failures and increasing service life.

[0022] A filter monitoring method with a leakage monitoring and alarm function comprises the following steps: S1: Before use, connect the liquid inlet to the filter port. During normal use, the oil enters the filter element through the liquid inlet and is filtered by the filter element. At the same time, before monitoring, the power assembly and the movable ring are driven to descend as a whole by rotating the adjusting screw until they are adjusted to the position to be monitored; S2: During monitoring, the extended card block is opened to drive the active gear to rotate, and the driven gear ring rotates accordingly, and synchronously drives the movable ring to rotate relative to the filter element. If the filter element at the position to be monitored leaks, the oil with a flow rate greater than the normal flow rate enters the inside of the movable ring; S3: At the same time, the liquid enters the inside of the regulating tube through the liquid inlet pipe and applies pressure to the piston plate. At this time, the limit spring can be compressed and drives the piston plate and the piston rod to move upward. At the same time, the permanent magnet moves upward until it enters the inside of the copper coil, cutting the magnetic field of the copper coil and generating an induced current. The external Hall current sensor detects the current, indicating that a leakage has occurred. S4: If the leakage is too large, the instantaneous flow entering the regulating tube will increase significantly. At this time, the limit spring is compressed to the limit position, and the permanent magnet rises to the highest point. At this time, the permanent magnet can contact the touch switch, and the power supply of the alarm is turned on, completing the alarm. When the flow at the leakage point decreases, the oil can complete the reflux through the reflux pipe, and the alarm component automatically resets.

[0023] The beneficial effects of the present invention are as follows: (1) The present invention utilizes the oil flow rate that increases in a short period of time when a leak occurs. Through the change in flow rate, in conjunction with the function of an alarm component and an external Hall current sensor, the pressure change can be converted into the displacement of a permanent magnet, and the displacement of the permanent magnet can be converted into a current change, thereby realizing a rapid monitoring process. The entire monitoring process responds quickly, and at the same time, the rotation of the movable ring can also quickly capture the leakage point, realize rapid monitoring, and thus reduce filtration failures and increase service life.

[0024] (2) The present invention further utilizes the changes in oil during leakage, that is, utilizes the sudden change in pressure during large-scale leakage to achieve the upward displacement of the permanent magnet, and utilizes its extreme displacement position to trigger the touch switch. The entire process can be completed automatically, and large-scale leakage can be monitored in the first time, which significantly improves safety and reduces losses.

[0025] (3) The present invention further utilizes the pressure of the oil. That is, when the device restores normal flow, the oil flow is in a constant state. Together with the function of the alarm component, the alarm component can be automatically reset. The entire process can be completed automatically and a continuous monitoring process can be maintained without the need for maintenance operations. This allows all-weather monitoring of the device and improves monitoring efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is an exploded schematic diagram of the lateral guide rail, power assembly and adjusting screw structure of the present invention; Figure 3 It is a schematic diagram of the coordination of the movable ring and the driven gear ring structure of the present invention; Figure 4 It is a cross-sectional schematic diagram of the internal structure of the movable ring of the present invention; Figure 5 It is a cross-sectional schematic diagram of the internal structure of the alarm assembly of the present invention; Figure 6 for Figure 5 A magnified schematic diagram of the structure at center A; Figure 7 It is a separate cross-sectional schematic diagram of the filter assembly structure of the present invention.

[0027] In the figure: 1. filter assembly; 101. metal shell; 102. liquid inlet; 103. filter element; 2. extension frame; 3. lateral guide rail; 4. power assembly; 401. mounting frame; 402. extension block; 403. main motor; 404. synchronization plate; 405. driving gear; 5. adjusting screw; 6. movable ring; 7. driven gear ring; 8. alarm assembly; 801. adjusting pipe; 802. liquid inlet pipe; 803. piston plate; 804. piston rod; 805. limit spring; 806. return pipe; 807. alarm pipe; 808. copper coil; 809. permanent magnet; 8010. touch switch; 8011. alarm. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figures 1 to 7 As shown, in an embodiment of the present invention, a filter with a leakage monitoring and alarm function includes a filter assembly 1, and the filter assembly 1 includes a metal shell 101. The top of the metal shell 101 is fixedly connected to a liquid inlet 102, and a filter element 103 is fixedly installed on the outer side of the metal shell 101. An extension frame 2 is fixedly installed on one side of the outer side of the metal shell 101, and a lateral guide rail 3 is installed in the middle of the extension frame 2. A power assembly 4 is movably sleeved inside the lateral guide rail 3, and a movable ring 6 is movably sleeved on the outer side of the filter element 103. A driven gear ring 7 is fixedly installed on the bottom end of the movable ring 6, and the driven gear ring 7 is meshed with the power assembly 4. The outer side of the movable ring 6 is movably connected to the power assembly 4, and the movable ring 6 rotates relative to the power assembly 4. One side of the movable ring 6 is fixedly connected to an alarm assembly 8, and an adjusting screw rod 5 is movably installed inside the lateral guide rail 3, and the adjusting screw rod 5 and the power assembly 4 are threadedly connected.

[0030] Before use, the liquid inlet 102 needs to be connected to the filter port of the device, and the filter element 103 needs to be ensured to be free of blockage. During normal filtration, the oil can enter the interior of the filter element 103 through the liquid inlet 102 and be filtered by the filter element 103. The filtered oil can be discharged through the outer side of the filter element 103. At the same time, when conducting leakage monitoring, the adjusting screw 5 can be manually turned according to the position to be monitored, driving the power component 4 as a whole to move up and down relative to the lateral guide rail 3, and synchronously driving the movable ring 6 to move up and down until the movable ring 6 is located on the outer surface of the position to be monitored of the filter element 103, thereby completing the adjustment of the monitoring position, and the bottom end of the adjusting screw 5 can be connected to an external motor, and the adjusting screw 5 can be driven by the external motor to rotate in real time to complete the real-time adjustment of the position of the movable ring 6.

[0031] like Figure 3 and Figure 5 as well as Figure 6 As shown, the alarm component 8 includes a regulating tube 801, the bottom end of the regulating tube 801 is fixedly connected to a liquid inlet tube 802, the bottom end of the liquid inlet tube 802 is connected to the top of the movable ring 6, the inside of the regulating tube 801 is movably sleeved with a piston plate 803, the top of the piston plate 803 is fixedly installed with a piston rod 804 located inside the regulating tube 801, the top of the regulating tube 801 is fixedly installed with an alarm tube 807, the top of the piston rod 804 sequentially penetrates the top of the regulating tube 801 and the bottom end of the alarm tube 807 and is fixedly connected with a permanent magnet 809 located inside the piston rod 804, the outer side of the piston rod 804 is movably sleeved with a limit spring 805, the limit spring The upper and lower ends of 805 are respectively connected to the top of the inner cavity of the regulating tube 801 and the bottom end of the piston plate 803. A return pipe 806 is fixedly connected to the outer side of the regulating tube 801 near the top. The other end of the return pipe 806 is connected to the outer side of the movable ring 6. A copper coil 808 is fixedly installed near the top of the inner cavity of the alarm tube 807. A touch switch 8010 is fixedly installed at the top of the inner cavity of the alarm tube 807. An alarm 8011 is fixedly installed in the middle of the top of the alarm tube 807. The output end of the touch switch 8010 is connected to the input end of the alarm 8011. The output end of the copper coil 808 is connected to an external Hall current sensor.

[0032] When a slight leakage occurs in the filter element 103, the flow rate entering the movable ring 6 will be greater than the constant flow rate, and part of the oil will enter the liquid inlet pipe 802 through the top of the movable ring 6, and at the same time enter the inside of the regulating pipe 801, and exert an upward thrust on the piston plate 803. At this time, the piston plate 803 and the piston rod 804 will move upward accordingly, and the limit spring 805 can be compressed, and drive the permanent magnet 809 to move upward.

[0033] like Figure 5 and Figure 6As shown, when the limit spring 805 is in the extreme compression state, the piston plate 803 is at the highest point, and the piston plate 803 is located above the output end of the return pipe 806, the permanent magnet 809 is in contact with the touch switch 8010, and a one-way valve is installed inside the liquid inlet pipe 802 and the return pipe 806, and the directions of the valves are inward conduction and outward blockage and outward conduction and inward blockage respectively.

[0034] Embodiment: When the leakage point is too large, the instantaneous flow rate will increase significantly, and the flow rate entering the regulating tube 801 will also increase significantly. At this time, the limit spring 805 can be compressed to the extreme position, and the permanent magnet 809 rises to the highest point until it contacts the touch switch 8010. At this time, the power supply of the alarm 8011 is turned on, and the alarm 8011 sounds an alarm to indicate a large-scale leakage.

[0035] By further utilizing the changes in oil during leakage, that is, utilizing the sudden change in pressure during large-scale leakage, the upward displacement of permanent magnet 809 can be achieved, and the touch switch 8010 can be triggered by utilizing its extreme displacement position. The entire process can be completed automatically, and large-scale leakage can be monitored in the first time, which significantly improves safety and reduces losses.

[0036] At the same time, when the pressure at the leakage point decreases or the leakage point is dealt with, part of the oil can complete the reflux through the reflux pipe 806 and re-enter the interior of the movable ring 6. At the same time, the limit spring 805 can automatically reset, driving the piston plate 803 to automatically reset. At this time, the permanent magnet 809 is no longer located inside the copper coil 808, that is, it no longer cuts its magnetic field, and the device is reset until the leakage point is detected again.

[0037] By further utilizing the oil pressure, that is, when the device restores normal flow, since the oil flow is in a constant state, combined with the action of the alarm component 8, the alarm component 8 can be automatically reset, and the entire process can be completed automatically. Continuous monitoring can be maintained without the need for maintenance operations, thereby achieving all-weather monitoring of the device and improving monitoring efficiency.

[0038] like Figure 1 and Figure 2As shown, the power assembly 4 includes a mounting frame 401, and an extension block 402 is fixedly installed on one side of the mounting frame 401. The extension block 402 is movably connected with the lateral guide rail 3, and the extension block 402 moves up and down relative to the lateral guide rail 3. The middle part of the extension block 402 is threadedly sleeved with the adjusting screw rod 5. A main motor 403 is fixedly installed on the bottom end of the mounting frame 401, and a driving gear 405 is fixedly installed on the output shaft of the main motor 403. The driving gear 405 is meshedly connected with the driven gear ring 7. A synchronous plate 404 is movably sleeved on the output shaft of the main motor 403, and the other end of the synchronous plate 404 is movably connected with the movable ring 6, and the movable ring 6 rotates relative to the synchronous plate 404.

[0039] Embodiment: When monitoring the leakage of the outer side of the filter element 103, the main motor 403 can be started to drive the driving gear 405 at the bottom to rotate. At this time, the driven gear ring 7 on one side of the driving gear 405 rotates synchronously and drives the movable ring 6 at the top to rotate relative to the filter element 103. At this time, the movable ring 6 can rotate around the monitoring position until a point at the monitoring position leaks, and the oil flow entering the movable ring 6 increases accordingly; When the oil flow increases, that is, when the permanent magnet 809 moves upward, the permanent magnet 809 extends into the interior of the copper coil 808 and cuts the magnetic field inside the copper coil 808. The copper coil 808 then generates an induced current and transmits it to the external Hall current sensor. The sensor then operates, indicating that a leak has occurred at the monitoring position, and the monitoring process is completed.

[0040] By utilizing the oil flow rate that increases in a short period of time during leakage, through the change in flow rate, in conjunction with the action of the alarm component 8, and the external Hall current sensor, the pressure change can be converted into the displacement of the permanent magnet 809, and the displacement of the permanent magnet 809 can be converted into current change, thereby realizing a rapid monitoring process. The entire monitoring process responds quickly, and at the same time, the rotation of the movable ring 6 can also quickly capture the leakage point, realize rapid monitoring, thereby reducing filtration failures and increasing service life.

[0041] A filter monitoring method with a leakage monitoring and alarm function comprises the following steps: S1: Before use, the liquid inlet 102 is connected to the filter port. In normal use, the oil enters the interior of the filter element 103 through the liquid inlet 102 and is filtered by the filter element 103. At the same time, before monitoring, the power assembly 4 and the movable ring 6 are driven to descend as a whole by rotating the adjusting screw rod 5 until they are adjusted to the position to be monitored; S2: During monitoring, the extended block 402 is opened to drive the driving gear 405 to rotate, and the driven gear ring 7 rotates accordingly, and synchronously drives the movable ring 6 to rotate relative to the filter element 103. If the filter element 103 at the position to be monitored leaks, the oil with a flow rate greater than the normal flow rate enters the interior of the movable ring 6; S3: At the same time, the liquid enters the inside of the regulating tube 801 through the liquid inlet pipe 802 and applies pressure to the piston plate 803. At this time, the limit spring 805 can be compressed, and the piston plate 803 and the piston rod 804 are driven to move upward. At the same time, the permanent magnet 809 moves upward until it enters the inside of the copper coil 808, cutting the magnetic field of the copper coil 808, generating an induced current, and the external Hall current sensor detects the current, indicating that a leakage phenomenon has occurred; S4: If the leakage is too large, the instantaneous flow entering the regulating tube 801 will increase significantly. At this time, the limit spring 805 is compressed to the extreme position, and the permanent magnet 809 rises to the highest point. At this time, the permanent magnet 809 can contact the touch switch 8010, and the power of the alarm 8011 is turned on to complete the alarm. When the flow at the leakage point decreases, the oil can complete the reflux through the reflux pipe 806, and the alarm component 8 is automatically reset.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter with a leakage monitoring and alarm function, comprising a filter assembly (1), characterized in that: The filter assembly (1) comprises a metal shell (101), the top end of the metal shell (101) is fixedly connected to a liquid inlet (102), a filter element (103) is fixedly mounted on the outer side of the metal shell (101), an extension frame (2) is fixedly mounted on one side of the outer side of the metal shell (101), a lateral guide rail (3) is mounted in the middle of the extension frame (2), a power assembly (4) is movably sleeved inside the lateral guide rail (3), and a filter element (103) is movably sleeved on the outer side of the filter element (103). A ring (6), a driven gear ring (7) is fixedly mounted on the bottom end of the movable ring (6), the driven gear ring (7) is meshingly connected to the power assembly (4), the outer side surface of the movable ring (6) is movably connected to the power assembly (4), the movable ring (6) rotates relative to the power assembly (4), one side of the movable ring (6) is fixedly connected to the alarm assembly (8), and an adjusting screw rod (5) is movably mounted inside the lateral guide rail (3), and the adjusting screw rod (5) is threadedly connected to the power assembly (4).

2. A filter with leakage monitoring and alarm function according to claim 1, characterized in that: The alarm assembly (8) comprises a regulating tube (801), the bottom end of the regulating tube (801) being fixedly connected to a liquid inlet tube (802), the bottom end of the liquid inlet tube (802) being connected to the top end of the movable ring (6), the inside of the regulating tube (801) being movably sleeved with a piston plate (803), the top end of the piston plate (803) being fixedly mounted with a piston rod (804) located inside the regulating tube (801).

3. A filter with leakage monitoring and alarm function according to claim 2, characterized in that: An alarm tube (807) is fixedly mounted on the top end of the regulating tube (801), and the top end of the piston rod (804) sequentially passes through the top end of the regulating tube (801) and the bottom end of the alarm tube (807) and is fixedly connected to a permanent magnet (809) located inside the piston rod (804).

4. A filter with leakage monitoring and alarm function according to claim 3, characterized in that: The outer side surface of the piston rod (804) is movably sleeved with a limit spring (805), and the upper and lower ends of the limit spring (805) are respectively connected to the top end of the inner cavity of the regulating tube (801) and the bottom end of the piston plate (803). A return pipe (806) is fixedly connected to a position near the top end of the outer side surface of the regulating tube (801), and the other end of the return pipe (806) is connected to the outer side surface of the movable ring (6).

5. The filter with leakage monitoring and alarm function according to claim 4, characterized in that: A copper coil (808) is fixedly mounted in a position near the top of the inner cavity of the alarm tube (807), a touch switch (8010) is fixedly mounted at the top of the inner cavity of the alarm tube (807), an alarm (8011) is fixedly mounted in the middle of the top of the alarm tube (807), an output end of the touch switch (8010) is connected to an input end of the alarm (8011), and an external Hall current sensor is connected to the output end of the copper coil (808).

6. A filter with leakage monitoring and alarm function according to claim 5, characterized in that: When the limit spring (805) is in an extreme compression state, the piston plate (803) is at the highest point, and the piston plate (803) is located above the output end of the return pipe (806), the permanent magnet (809) is in contact with the touch switch (8010), and one-way valves are installed inside the liquid inlet pipe (802) and the return pipe (806), and the directions of the valves are inward conduction and outward blockage and outward conduction and inward blockage, respectively.

7. The filter with leakage monitoring and alarm function according to claim 1, characterized in that: The power assembly (4) comprises a mounting frame (401), an extension block (402) being fixedly mounted on one side of the mounting frame (401), the extension block (402) being movably engaged with the lateral guide rail (3), the extension block (402) being displaced up and down relative to the lateral guide rail (3), and the middle portion of the extension block (402) being threadedly sleeved with the adjusting screw rod (5).

8. The filter with leakage monitoring and alarm function according to claim 7, characterized in that: A main motor (403) is fixedly mounted on the bottom end of the mounting frame (401); a driving gear (405) is fixedly mounted on the output shaft of the main motor (403); the driving gear (405) is meshingly connected with a driven gear ring (7); a synchronizing plate (404) is movably sleeved on the output shaft of the main motor (403); the other end of the synchronizing plate (404) is movably connected to a movable ring (6); and the movable ring (6) rotates relative to the synchronizing plate (404).

9. A monitoring method using the filter according to claims 1-8, characterized in that: The following steps are involved: S1: Before use, the liquid inlet (102) is connected to the filter port. During normal use, the oil enters the interior of the filter element (103) through the liquid inlet (102) and is filtered by the filter element (103). At the same time, before monitoring, the power assembly (4) and the movable ring (6) are driven to descend as a whole by rotating the adjusting screw rod (5) until they are adjusted to the position to be monitored; S2: During monitoring, the extended clamp (402) is opened to drive the driving gear (405) to rotate, and the driven gear ring (7) rotates accordingly, and synchronously drives the movable ring (6) to rotate relative to the filter element (103). If the filter element (103) at the position to be monitored leaks, oil with a flow rate greater than the normal flow rate enters the interior of the movable ring (6); S3: At the same time, the liquid enters the interior of the regulating tube (801) through the liquid inlet pipe (802) and applies pressure to the piston plate (803). At this time, the limit spring (805) can be compressed, and the piston plate (803) and the piston rod (804) are driven to move upward. At the same time, the permanent magnet (809) moves upward until it enters the interior of the copper coil (808), cuts the magnetic field of the copper coil (808), generates an induced current, and the external Hall current sensor detects the current, indicating that a leakage phenomenon has occurred; S4: If the leakage is too large, the instantaneous flow rate entering the regulating tube (801) increases significantly. At this time, the limit spring (805) is compressed to the limit position, and the permanent magnet (809) rises to the highest point. At this time, the permanent magnet (809) can contact the touch switch (8010), and the power supply of the alarm (8011) is turned on, completing the alarm. When the flow rate at the leakage point decreases, the oil can complete the reflux through the return pipe (806), and the alarm component (8) is automatically reset.

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