Filtering system and working method thereof

Abstract

The invention discloses a filtering system and a working method thereof, and relates to the technical field of fluid filtration, the filtering system comprises a main filter and a standby filter, the main filter and the standby filter are both internally provided with precise filter element mechanisms, and both the main filter and the standby filter are provided with liquid inlets; a liquid inlet of the main filter is communicated with an external liquid feeding main pipeline, and the main filter is provided with a hydraulic detector; the filter further comprises a lifting driving mechanism and a valve switching mechanism, the lifting driving mechanism is arranged on the main filter, and the valve switching mechanism is arranged between the liquid inlets of the main filter and the standby filter. When the precise filter element mechanism is used for filtering, if the internal pressure of the filter cartridge of the main filter exceeds a set value, the standby filter is switched to replace the filtering operation, so that an operator can conveniently replace the precise filter element mechanism in the main filter under the condition that the filtering operation does not need to be stopped.

Description

Technical Field

[0001] The invention relates to the technical field of fluid filtration, and in particular to a filtration system and a working method thereof. Background Art

[0002] Cartridge filters are widely used in pure water, pharmaceuticals, fine chemicals, high-purity electronic chemicals, high-purity electronic gases and other industrial fields. After being equipped with high-precision folded membrane filter elements, they can achieve very high filtration efficiency, that is, precision filtration. In addition, some fluid products contain ferromagnetic impurities, so after precision filtration, the ferromagnetic impurities will also be filtered out by strong magnetic filters.

[0003] The Chinese patent with the authorization announcement number CN215742237U discloses a filter element clamping structure anti-corrosion filter, which discloses that a filter element plug-in fixing structure plate is set at the bottom of the shell, a tension rod is set in the center of the fixed structure plate, and multiple filter elements are evenly arranged on the fixed structure plate around the tension rod, and a clamping porous plate for clamping and fixing the filter element is set above the tension rod. This solution changes the filter element plug-in fixing structure plate to carbon steel or stainless steel, and sprays an anti-corrosion coating on the surface and sintered at high temperature. It has sufficient support strength and can withstand high pressure difference, high temperature and deformation. It can ensure that the plug-in fixing structure plate will not deform and leak due to the influence of working pressure difference and temperature over time.

[0004] The above scheme has the disadvantage that: although the above scheme can effectively reinforce the filter element connection and plug-in structure to ensure that the filter element connection position has a certain support strength, since such filter element filters are generally industrial processing equipment, the amount of liquid products filtered and processed is large, and the internal pressure will also be large. After the filter element is put into use, the impurities are continuously intercepted and filter cakes are produced, and the overall pressure drop of the filter is gradually increasing. This part of the pressure is borne by the filter element. In order to ensure that the filter element is not crushed, it is necessary to check the filter inlet and outlet pressure gauges to calculate the pressure difference value during daily maintenance work. It is necessary to ensure that the pressure difference value is ≤0.1MPa. If the pressure difference is close to or exceeds 0.1MPa, the filter element should be stopped and replaced. Pressure monitoring generally relies mainly on manual monitoring. Once it is not discovered in time, it is easy to cause the filter element to be flattened, thereby affecting the subsequent disassembly and maintenance. Although there is also a pressure monitoring system to monitor the pressure in the filter, even if it can be found in time that the pressure exceeds a certain value, it is necessary to stop the machine and manually replace the filter element, which will lead to production suspension, affect production efficiency, and cannot ensure the continuous and effective operation of the filtration system. Summary of the invention

[0005] The object of the present invention is to provide a filtration system and a working method thereof, so as to solve the technical problem in the prior art that the cartridge filter is not convenient for ensuring the continuous and effective operation of the filtration system when the internal pressure of the filter exceeds a safe value.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solutions:

[0007] A filtering system, comprising a main filter and a spare filter, wherein the main filter and the spare filter are both provided with a precision filter element mechanism, the main filter and the spare filter are both provided with a liquid inlet, and the liquid inlet of the main filter is connected to an external liquid delivery main pipeline, and the main filter is provided with a hydraulic detector; and further comprising:

[0008] A lifting drive mechanism, wherein the lifting drive mechanism is arranged on the main filter and is electrically connected to the hydraulic detector, and the lifting drive mechanism drives the precision filter element mechanism inside the main filter to rise;

[0009] A valve switching mechanism is provided between the liquid inlets of the main filter and the backup filter, and the valve switching mechanism includes a flow direction switching drive mechanism, which is used to switch the connection state between the external liquid supply main pipeline and the main filter and the backup filter.

[0010] As a further solution of the present invention: the main filter and the backup filter both include a filter cartridge, a liquid inlet pipe, a liquid outlet pipe and a pressure relief pipe, the liquid inlet pipe and the pressure relief pipe are both arranged on one side of the filter cartridge, the liquid inlet pipe and the pressure relief pipe of the main filter are both connected to the valve switching mechanism, and the liquid outlet pipe is arranged at the bottom of the filter cartridge.

[0011] As a further solution of the present invention: the valve switching mechanism includes a first steering valve, which is arranged between the liquid inlet pipe of the main filter and the liquid inlet pipe of the backup filter, a second steering valve is arranged on the pressure relief pipe of the main filter, and a linkage mechanism is arranged between the first steering valve and the second steering valve.

[0012] As a further solution of the present invention: the first steering valve includes a first valve cylinder and a first columnar valve core, one side of the first valve cylinder is connected to the liquid inlet pipe of the main filter through a pipeline, and the other side is provided with a transition pipe, and the first valve cylinder is connected to the liquid inlet pipe of the standby filter through the transition pipe, the first columnar valve core is rotatably arranged in the first valve cylinder, a main channel is opened in the first columnar valve core, one side of the main channel is provided with a bypass channel 1 for connecting with the liquid inlet pipe of the main filter, and the other side is provided with a bypass channel 2, and the bypass channel 2 is used to connect with the transition pipe, both bypass channel 1 and bypass channel 2 are connected to the main channel, and one side of the main channel is fixedly connected with a rotating pipe that rotates synchronously with the first columnar valve core.

[0013] As a further solution of the present invention: the second steering valve includes a second valve cylinder and a second columnar valve core, one side of the second valve cylinder is connected to the pressure relief pipe of the main filter, and a discharge pipe is arranged at the bottom of the second valve cylinder, the second columnar valve core is rotatably connected in the second valve cylinder, and a diverter channel 1 and a diverter channel 2 are provided on the second columnar valve core, the diverter channel 1 and the diverter channel 2 are connected to each other, the diverter channel 1 is used to connect to the pressure relief pipe of the main filter, and the diverter channel 2 is used to connect to the discharge pipe, and the linkage mechanism is connected between the rotating pipe and the second columnar valve core.

[0014] As a further solution of the present invention: the flow direction switching drive mechanism includes a linkage gear and a linkage rack, the linkage rack is connected to the lifting end of the lifting drive mechanism, the linkage gear is coaxially connected to the rotating tube, and the linkage rack is meshed with the linkage gear.

[0015] As a further solution of the present invention: the lifting drive mechanism includes a hydraulic telescopic rod and a connecting cross plate, the hydraulic telescopic rod is vertically fixedly connected to one side of the main filter, the hydraulic telescopic rod is electrically connected to the hydraulic detector, the telescopic end of the hydraulic telescopic rod is fixedly connected to a positioning plate, and there are two positioning plates, a connecting guide rod is fixedly connected between the two positioning plates, the connecting guide rod slides through one end of the connecting cross plate, a lifting cover body is provided on the top of the main filter, the other end of the connecting cross plate is connected to the lifting cover body, and the precision filter element mechanism is connected to the lifting cover body.

[0016] As a further solution of the present invention: a locking mechanism is provided between the lifting cover body and the filter cartridge, the locking mechanism includes a sliding card, a linkage ring and a movable top rod, the sliding card is provided in multiple groups and is equidistantly distributed around the lifting cover body, each group of the sliding card includes a connecting rail, a U-shaped card body and an L-shaped linkage plate, the connecting rail is fixedly connected to the edge of the lifting cover body, the U-shaped card body is slidably connected to the connecting rail, and a limiting spring is cooperatively connected between the U-shaped card body and the corresponding connecting rail, and the edge of the lifting cover body is fixedly connected to the U-shaped card body. The top edges of the filter cartridges are respectively provided with outer convex rings that fit together with each other, and each of the U-shaped card bodies is simultaneously engaged with the two outer convex rings that fit together, and the L-shaped linkage plate is fixedly connected to the side of the U-shaped card body away from the lifting cover body, and the linkage ring is sleeved on the outside of the filter cartridge of the main filter, and the linkage ring is connected to the telescopic end of the hydraulic telescopic rod. There are multiple movable push rods, which are equidistantly distributed on the linkage ring in the circumferential direction, and one end of each movable push rod is movably connected to the linkage ring through a rebound hinge, and the other end is aligned with the bending position of the L-shaped linkage plate.

[0017] As a further solution of the present invention: the precision filter element mechanism includes a filter element body, a magnetic rod, a movable baffle, a pressure plate and a sleeve. A support ring is fixedly connected to the inner side of the filter element near the bottom, and the movable baffle is mounted on the support ring. A plurality of card slots are circumferentially opened on the movable baffle, and a through hole is provided at the bottom of the card slot. The filter element body is provided with multiple and corresponding card slots are placed in the card slots. A support guide rod is vertically fixedly connected to the center position of the movable baffle. The sleeve is fixedly connected to the inner bottom of the lifting cover body, and the top of the support guide rod is slidably inserted in the sleeve. The pressure plate is fixedly connected to the sleeve, and a plurality of positioning grooves are distributed circumferentially around the sleeve on the bottom surface of the pressure plate. A positioning card plate is fixedly connected to the top of each filter element body, and the positioning card plate is correspondingly stuck in the positioning groove. A plurality of magnetic rods are distributed circumferentially on the outer side of each filter element body, and the magnetic rods are fixedly connected to the corresponding positioning card plates.

[0018] A working method of a filtering system, the specific steps are as follows:

[0019] The first step is to transport the liquid product to the external liquid delivery main pipeline through the pump body. The liquid product passes through the external liquid delivery main pipeline into the main filter and is filtered by the precision filter element mechanism. During the transportation process, the flow rate is monitored by the flow meter, and the hydraulic pressure in the main filter is monitored by the hydraulic pressure detector;

[0020] In the second step, the liquid is filtered through a precision filter element mechanism and discharged from the bottom of the main filter to a strong magnetic filter for strong magnetic filtration to remove metal particles in the liquid;

[0021] Step 3: After the hydraulic detector detects that the hydraulic pressure inside the main filter exceeds the set value, the lifting drive mechanism starts and drives the precision filter element mechanism inside the main filter to rise;

[0022] Step 4. The lifting drive mechanism drives the precision filter element mechanism to rise, thereby driving the flow switching drive mechanism to operate. The flow switching drive mechanism switches the external liquid delivery main pipeline to be connected to the liquid inlet of the backup filter, and relies on the backup filter to take over the main filter for filtering operations.

[0023] Beneficial effects of the present invention:

[0024] 1. When filtering is performed through the precision filter element mechanism of the present invention, if the internal pressure of the filter cartridge of the main filter exceeds a set value, the hydraulic telescopic rod drives the linkage rack and the linkage gear to operate, thereby causing the first steering valve between the liquid inlet pipe of the main filter and the spare filter to be turned, so that the first columnar valve core originally connected to the liquid inlet pipe of the main filter is rotated and switched to be connected to the liquid inlet pipe of the spare filter, thereby facilitating the direct use of the spare filter to take over the filtering operation, and facilitating the operator to replace the precision filter element mechanism in the main filter without stopping the filtering operation.

[0025] 2. The hydraulic telescopic rod of the present invention drives the second steering valve on the pressure relief pipe of the main filter to turn when the first steering valve is switched through the linkage rack and the linkage gear, thereby opening the pressure relief pipe, facilitating the pressure relief in the main filter, and avoiding the danger of liquid spraying out due to excessive pressure when the main filter is opened.

[0026] 3. When the hydraulic telescopic rod of the present invention is operated because the internal pressure of the main filter exceeds the set value, the first steering valve and the second steering valve are first turned to operate, the liquid inlet pipeline of the main filter is disconnected, and the pressure relief pipe is opened at the same time. Then, as the hydraulic telescopic rod keeps operating, the provided linkage ring is driven to rise. The linkage ring relies on the movable push rod to act on the L-shaped linkage plate connected to the U-shaped card bodies at various positions, and relies on the extrusion effect to make all the U-shaped card bodies separate from the lifting cover body and the outer convex ring between the filter cartridge, thereby realizing the unlocking of the lifting cover body, so that it is convenient for the hydraulic telescopic rod to drive the lifting cover body to rise, and the lifting cover body drives the internal precision filter element mechanism to rise and separate, so as to facilitate replacement.

[0027] 4. The precision filter element mechanism of the present invention relies on the set magnetic rod to filter the ferromagnetic impurities in the liquid, and relies on the filter element body as a folded filter element to perform further precision filtration to ensure the filtering effect, and when each filter element body is raised with the movable partition, its top has been separated from the set pressure plate, which is convenient for the operator to quickly remove the distributed filter element bodies and improve the replacement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a structural schematic diagram of the hydraulic telescopic rod and the rotating tube in the present invention;

[0031] Figure 3 It is a schematic diagram of the cross-sectional structure of the first columnar valve core in the present invention;

[0032] Figure 4 is a schematic cross-sectional structure diagram of the second columnar valve core in the present invention;

[0033] Figure 5 It is a schematic diagram of the positions of the first columnar valve core and the second columnar valve core when the main filter of the present invention performs liquid filtering;

[0034] Figure 6 It is a schematic diagram of the positions of the first columnar valve core and the second columnar valve core when the standby filter in the present invention performs liquid filtering;

[0035] Figure 7It is a schematic cross-sectional structure diagram of the connection between the filter element body and the filter cartridge in the present invention;

[0036] Figure 8 It is a schematic structural diagram of the filter element body, the movable partition plate and the pressure plate in the present invention;

[0037] Fig. 9 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0038] Fig.10 It is a schematic diagram of the state in which the U-shaped card body is separated from the lifting cover body after the hydraulic telescopic rod drives the linkage ring to rise in the present invention;

[0039] Fig.11 It is a schematic diagram of the state when the hydraulic telescopic rod drives the lifting cover body to separate from the filter cartridge in the present invention.

[0040] In the figure: 1, main filter; 2, filter cartridge; 3, hydraulic detector; 4, liquid outlet pipe; 5, lifting cover; 6, liquid inlet pipe; 7, pressure relief pipe; 8, spare filter; 9, hydraulic telescopic rod; 10, external liquid delivery main pipeline; 11, rotating pipe; 12, linkage rack; 13, linkage gear; 14, synchronous wheel; 15, synchronous belt; 16, first valve cylinder; 17, second valve cylinder; 18, first columnar valve core; 19, second columnar valve core; 20, bypass channel 1; 21, bypass channel 2; 22, main channel; 23, diversion channel one; 24, diversion channel two; 25, sleeve; 26, support guide rod; 27, filter element body; 28, magnetic rod; 29, positioning groove; 30, positioning card plate; 31, pressure plate; 32, movable partition; 33, support ring; 34, card groove; 35, outer convex ring; 36, U-shaped card body; 37, connecting guide rail; 38, L-shaped linkage plate; 39, linkage ring; 40, movable top rod; 41, transition pipe; 42, connecting cross plate; 43, positioning plate; 44, connecting guide rod. DETAILED DESCRIPTION

[0041] 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.

[0042] like Figure 1-Figure 11 As shown, a filtering system includes a main filter 1 and a spare filter 8, wherein the main filter 1 and the spare filter 8 are both provided with a precision filter element mechanism, and the main filter 1 is provided with a hydraulic detector 3 for detecting the internal hydraulic pressure of the main filter 1; the system also includes a lifting drive mechanism and a valve switching mechanism;

[0043] The lifting drive mechanism is arranged on the main filter 1, and the lifting drive mechanism is electrically connected to the hydraulic detector 3. When the precision filter element mechanism inside the main filter 1 is clogged with filter residue due to long-term use, affecting the filtering effect, the pressure inside the main filter 1 will gradually rise. When it exceeds a certain value, the hydraulic detector 3 detects that the pressure inside the main filter 1 exceeds the set value, and the controller collects data signals, performs logical judgment, and then sends a control instruction to control the lifting drive mechanism to drive the precision filter element mechanism inside the main filter 1 to rise, so that the operator can replace the precision filter element mechanism that cannot effectively filter in time, and avoid the precision filter element mechanism being flattened or collapsed by pressure.

[0044] Both the main filter 1 and the spare filter 8 are provided with a liquid inlet, and the liquid inlet of the main filter 1 is connected with the external liquid supply main pipeline 10. The valve switching mechanism is arranged between the liquid inlets of the main filter 1 and the spare filter 8, and the valve switching mechanism includes a flow direction switching driving mechanism. When the lifting driving mechanism drives the precision filter element mechanism in the main filter 1 to rise, the flow direction switching driving mechanism switches the external liquid supply main pipeline 10 to be connected with the liquid inlet of the spare filter 8, thereby avoiding suspension of the filtering work, and the precision filter element mechanism inside the main filter 1 can be replaced when the spare filter 8 is used for filtering.

[0045] In some specific embodiments, in combination Figure 1 and Figure 2 As shown, the main filter 1 and the backup filter 8 both include a filter cartridge 2, a liquid inlet pipe 6, a liquid outlet pipe 4 and a pressure relief pipe 7. The liquid inlet pipe 6 and the pressure relief pipe 7 are both arranged on one side of the filter cartridge 2 near the bottom, and the liquid inlet pipe 6 and the pressure relief pipe 7 are arranged in parallel up and down. Here, the liquid inlet pipe 6 is connected with the liquid inlet mentioned above. The liquid inlet pipe 6 and the pressure relief pipe 7 of the main filter 1 are both connected with the valve switching mechanism. The liquid outlet pipe 4 is arranged at the bottom of the filter cartridge 2. The liquid entering the filter cartridge 2 through the liquid inlet pipe 6 is filtered by the precision filter element mechanism. The filtered liquid is discharged through the liquid outlet pipe 4. The liquid outlet pipe 4 can be connected to a strong magnetic filter to facilitate the liquid after precision filtration to enter the strong magnetic filter for magnetic filtration.

[0046] In other specific embodiments, in combination Figures 1 to 6 As shown, the valve switching mechanism includes a first steering valve, which is arranged between the liquid inlet pipe 6 of the main filter 1 and the liquid inlet pipe 6 of the backup filter 8, a second steering valve is arranged on the pressure relief pipe 7 of the main filter 1, and a linkage mechanism is arranged between the first steering valve and the second steering valve.

[0047] The first steering valve includes a first valve cylinder 16 and a first columnar valve core 18. One side of the first valve cylinder 16 is connected to the liquid inlet pipe 6 of the main filter 1 through a pipeline, and the other side is provided with a transition pipe 41. The first valve cylinder 16 is connected to the liquid inlet pipe 6 of the standby filter 8 through the transition pipe 41. The first columnar valve core 18 is rotatably arranged in the first valve cylinder 16. The first columnar valve core 18 can rotate in the first valve cylinder 16. A main channel 22 is opened at the central axial position of the first columnar valve core 18. The main channel 22 is A bypass channel 1 20 is provided on one side for communicating with the liquid inlet pipe 6 of the main filter 1, and a bypass channel 21 is provided on the other side which is perpendicular to the bypass channel 1 20, and the bypass channel 21 is used to communicate with the transition pipe 41, and the bypass channel 1 20 and the bypass channel 21 are both distributed along the radial position of the first columnar valve core 18 and are connected with the main channel 22, and a rotating tube 11 which rotates synchronously with the first columnar valve core 18 is fixedly connected to one side of the main channel 22, and the rotating tube 11 is rotatably connected to the external liquid supply main pipeline 10 and are connected with each other.

[0048] When filtering liquid through the main filter 1, the bypass channel 1 20 is in a connected state with the liquid inlet pipe 6 of the main filter 1, and the bypass channel 2 21 is in a closed state facing the inner wall of the first valve cylinder 16. The liquid to be filtered is transported to the transfer tube 11 by relying on the external liquid delivery main pipeline 10, and then diverted to the bypass channel 1 20 through the main channel 22, and then enters the filter cylinder 2 of the main filter 1 through the liquid inlet pipe 6 for filtration. When the first columnar valve core 18 rotates ninety degrees clockwise, the bypass channel 1 20 is disconnected from the liquid inlet pipe 6 of the main filter 1, and the bypass channel 2 21 is in a connected state with the transition pipe 41, so that the introduced liquid can enter the spare filter 8 through the transition pipe 41.

[0049] In addition, the second steering valve includes a second valve cylinder 17 and a second columnar valve core 19. One side of the second valve cylinder 17 is connected to the pressure relief pipe 7 of the main filter 1 through a pipeline, and a discharge pipe is arranged at the bottom of the second valve cylinder 17. The second columnar valve core 19 is rotatably connected in the second valve cylinder 17. A diverter channel 1 23 and a diverter channel 2 24 are provided on the second columnar valve core 19. The diverter channel 1 23 and the diverter channel 2 24 are perpendicular to each other and are radially distributed along the second columnar valve core 19. The two are connected to each other. The diverter channel 1 23 is used to connect to the pressure relief pipe 7 of the main filter 1, and the diverter channel 2 24 is used to connect to the discharge pipe. The linkage mechanism is connected between the rotating tube 11 and the second columnar valve core 19.

[0050] When the main filter 1 is filtering liquid, the shunt channel 1 23 on the second columnar valve core 19 faces the discharge pipe, and the shunt channel 2 24 faces the inner wall of the second valve cylinder 17, and is in a closed state. At this time, the pressure relief pipe 7 is closed by the second columnar valve core 19. When the rotating tube 11 drives the first columnar valve core 18 to rotate ninety degrees clockwise, the second columnar valve core 19 rotates ninety degrees synchronously, so that the shunt channel 1 23 on the second columnar valve core 19 is connected with the pressure relief pipe 7, and the shunt channel 2 24 is connected with the discharge pipe, so that when the internal pressure of the main filter 1 is too large, the external liquid supply main pipeline 10 is connected with the liquid inlet pipe 6 of the spare filter 8, that is, the pipeline for continuing to supply liquid to the main filter 1 is disconnected, and the pressure relief pipe 7 can also be connected with the discharge pipe through the shunt channel 1 23 and the shunt channel 2 24, so as to release the liquid inside the main filter 1 and reduce its internal pressure, so as to avoid liquid spraying when disassembling the precision filter element mechanism inside the main filter 1, which may cause danger.

[0051] In some specific implementation schemes, the linkage mechanism includes a synchronous wheel 14 and a synchronous belt 15. The rotating tube 11 and the second columnar valve core 19 are coaxially fixedly connected with the synchronous wheel 14. It should be noted that one end of the second columnar valve core 19 is coaxially provided with an extension shaft extending from the inside of the second valve cylinder 17. The corresponding synchronous wheel 14 can be coaxially connected to the second columnar valve core 19 through the extension shaft. The synchronous belt 15 is connected between the two synchronous wheels 14. The synchronous wheel 14 and the synchronous belt 15 can keep the first columnar valve core 18 and the second columnar valve core 19 rotating synchronously.

[0052] In some specific embodiments, the flow direction switching drive mechanism includes a linkage gear 13 and a linkage rack 12. The linkage rack 12 is connected to the lifting end of the lifting drive mechanism. The linkage gear 13 is coaxially connected to the rotating tube 11, and the linkage rack 12 is meshed with the linkage gear 13. When the lifting drive mechanism starts to drive the precision filter element mechanism to rise, the linkage rack 12 is driven to rise, and the linkage rack 12 drives the linkage gear 13 to rotate, and the linkage gear 13 drives the rotating tube 11 to rotate.

[0053] In some specific embodiments, in combination Figure 1 and Fig.10 As shown, the lifting drive mechanism includes a hydraulic telescopic rod 9 and a connecting cross plate 42. The hydraulic telescopic rod 9 is vertically fixedly connected to one side of the main filter 1, and the telescopic end is facing upward. The hydraulic telescopic rod 9 is electrically connected to the hydraulic detector 3. The telescopic end of the hydraulic telescopic rod 9 is fixedly connected to a positioning plate 43, and two positioning plates 43 are provided, which are distributed parallel to each other up and down. A connecting guide rod 44 is fixedly connected between the two positioning plates 43. The connecting guide rod 44 slides through one end of the connecting cross plate 42. Two connecting guide rods 44 are provided in pairs. A lifting cover body 5 is provided on the top of the main filter 1. The other end of the connecting cross plate 42 is connected to the lifting cover body 5 through a connecting piece, and the precision filter element mechanism is connected to the lifting cover body 5.

[0054] When the hydraulic detector 3 detects that the pressure in the filter cartridge 2 of the main filter 1 is greater than the set value, the supporting controller controls the hydraulic telescopic rod 9 to extend. When the hydraulic telescopic rod 9 begins to extend, it drives the connecting guide rod 44 to rise relative to the connecting cross plate 42 through the positioning plate 43. At this time, the lifting cover 5 will not directly open the top of the filter cartridge 2 to prevent the filter cartridge 2 from opening directly and spraying liquid without removing the internal pressure. At this time, the linkage rack 12 drives the linkage gear 13, and the linkage first columnar valve core 18 and the second columnar valve core 19 are deflected to achieve switching, that is, the filter cartridge of the main filter 1 is firstly opened. 2 The liquid supply pipeline is disconnected, and the pressure relief pipe 7 is opened at the same time to discharge the liquid in the filter cartridge 2 and relieve its internal pressure. When the hydraulic telescopic rod 9 brings the positioning plate 43 at the lower end of the telescopic rod 9 to contact the connecting transverse plate 42, the connecting transverse plate 42 can be pushed up and raised. At this time, the linkage rack 12 has been separated from the linkage gear 13 in advance, and the first columnar valve core 18 and the second columnar valve core 19 have completed a ninety-degree clockwise rotation. Then, the hydraulic telescopic rod 9 can drive the lifting cover 5 to rise through the connecting transverse plate 42, thereby driving the precision filter element mechanism to rise, which is convenient for replacement.

[0055] In some specific embodiments, when the lifting cover 5 on the main filter 1 is covered on the filter cartridge 2, there is a relative sliding between the telescopic end of the hydraulic telescopic rod 9 and the connecting cross plate 42. In order to prevent the lifting cover 5 from accidentally opening during the operation of the filter cartridge 2, the lifting cover 5 is combined with the hydraulic telescopic rod 9 to prevent the lifting cover 5 from accidentally opening during the operation of the filter cartridge 2. Figure 1 , Fig. 9 and Fig.10As shown, a locking mechanism is provided between the lifting cover body 5 and the filter cartridge 2, and the locking mechanism includes a sliding card, a linkage ring 39 and a movable top rod 40. There are multiple groups of sliding cards, which are equidistantly distributed around the lifting cover body 5. Each group of sliding cards includes a connecting guide rail 37, a U-shaped card body 36 and an L-shaped linkage plate 38. The connecting guide rail 37 is fixedly connected to the edge of the lifting cover body 5, and the U-shaped card body 36 is slidably connected to the connecting guide rail 37. A compressible limit spring is cooperatively connected between the U-shaped card body 36 and the corresponding connecting guide rail 37. The edge of the lifting cover body 5 and the top edge of the filter cartridge 2 are respectively provided with outer convex rings 35 that fit each other, and each U-shaped card body 36 is simultaneously engaged with two outer convex rings 35 that fit each other. An insert sleeve is provided on the inner side of the lifting cover body 5, and the insert sleeve is inserted into the filter cartridge 2, so that the longitudinal and lateral position of the lifting cover body 5 can be limited; the L-shaped linkage plate 38 is fixedly connected to the side of the U-shaped card body 36 away from the lifting cover body 5, and the linkage ring 39 is sleeved on the outer side of the filter cartridge 2 of the main filter 1, and the inner diameter of the linkage ring 39 is larger than the outer diameter of the outer convex ring 35, which is convenient for lifting and passing; the linkage ring 39 is connected to the telescopic end of the hydraulic telescopic rod 9, and a plurality of movable push rods 40 are provided, and are equidistantly distributed on the linkage ring 39 in the circumferential direction. One end of each movable push rod 40 is movably connected to the linkage ring 39 through a rebound hinge, and the other end is aligned with the bending position of the L-shaped linkage plate 38, and each movable push rod 40 is in an inclined state as a whole.

[0056] When the hydraulic telescopic rod 9 drives the positioning plate 43 and the connecting guide rod 44 to rise relative to the connecting cross plate 42, and the positioning plate 43 at the lower position has not yet contacted the connecting cross plate 42, the lifting cover 5 and the filter cartridge 2 rely on the distributed U-shaped card bodies 36 to bite the fitting outer convex ring 35 and maintain a locked state to prevent the internal pressure of the filter cartridge 2 from dropping and the lifting cover 5 from opening. During this process, the hydraulic telescopic rod 9 drives the linkage ring 39 to rise, and the linkage ring 39 drives the distributed movable push rods 40 to rise. When each movable push rod 40 rises to the height position where the L-shaped linkage plate 38 is located, the movable push rod 4 0 contacts the bent position of the L-shaped linkage plate 38, and then due to the extrusion effect, the movable push rod 40 is deflected relative to the linkage ring 39, thereby pushing the L-shaped linkage plate 38, and the L-shaped linkage plate 38 drives the connected U-shaped card body 36 to slide along the connecting guide rail 37 in the direction away from the lifting cover body 5, so that the U-shaped card body 36 can be separated from the fitted outer convex ring 35 and unlocked. After the U-shaped card body 36 is separated from the outer convex ring 35, the positioning plate 43 in the lower position just contacts the connecting cross plate 42, thereby driving the unlocked lifting cover body 5 to rise.

[0057] In some specific embodiments, in combination Figure 7 and Figure 8As shown, the precision filter element mechanism includes a filter element body 27, a magnetic rod 28, a movable partition 32, a pressure plate 31 and a sleeve 25. A support ring 33 is fixedly connected to the inner side of the filter cartridge 2 near the bottom, and the movable partition 32 is mounted on the support ring 33. It should be noted that the positions of the liquid inlet pipe 6 and the pressure relief pipe 7 are higher than the position of the movable partition 32 after installation. A plurality of card slots 34 are opened on the movable partition 32 in the circumferential direction, and a through hole is provided at the bottom of the card slot 34. The through hole connects the upper and lower sides of the movable partition 32. The filter element body 27 is provided with multiple card slots 34, and the corresponding card slots are placed in the card slots 34. The through hole at the bottom of the filter element body 27 passes through the through hole, which is convenient for connecting with the liquid outlet pipe 4 at the bottom of the filter cartridge 2; the filter element body 27 is a folded filter element, which is usually folded by multiple layers of filter paper or non-woven fabrics of different materials to form a fan-shaped structure. This design can greatly increase the filtration area, improve the filtration efficiency and the dirt holding capacity, and facilitate the precise filtration of the liquid; the center position of the movable partition 32 is vertically fixedly connected with a support guide rod 26, the sleeve 25 is fixedly connected to the inner bottom of the lifting cover body 5, and the top of the support guide rod 26 slides and inserts into the sleeve 25, and at the same time, a limiting convex edge is provided at the end of the support guide rod 26, and the outer diameter of the limiting convex edge is equal to the inner diameter of the sleeve 25, which is convenient for the support guide rod 26 to slide up and down smoothly relative to the sleeve 25, and the edge of the bottom port of the sleeve 25 is folded inwards, cooperating with the limiting convex edge to prevent the support guide rod 26 from separating from the sleeve 25; the pressure plate 31 It is fixedly connected to the sleeve 25, and the bottom surface of the pressure plate 31 is circumferentially distributed with multiple positioning grooves 29 around the sleeve 25. The top of each filter element 27 is fixedly connected with a positioning card plate 30, and the positioning card plate 30 is correspondingly clamped in the positioning groove 29. A plurality of magnetic rods 28 are circumferentially distributed on the outer side of each filter element 27, and the magnetic rods 28 are fixedly connected to the corresponding positioning card plates 30. The set magnetic rods 28 generate a magnetic field, which can rely on magnetic force to preliminarily adsorb ferromagnetic impurities in the liquid that is about to enter the filter element 27, and then the fluid passes through the filter element 27 as a folded filter element for precise filtration, thereby ensuring the filtering effect.

[0058] It should be noted that when the lifting cover 5 is covered on the filter cartridge 2, the movable partition 32 is supported on the support ring 33, and at this time, the top of the support guide rod 26 is completely inserted into the sleeve 25 and contacts the top of the sleeve 25, and the positioning groove 29 of the pressure plate 31 is docked with the positioning card plate 30 at the top of the filter element 27, and the filter element 27 is firmly pressed on the movable partition 32, which is convenient for filtering operations. When the lifting cover 5 is raised, it first drives the sleeve 25 relative to the support guide rod 26. 6 slides and rises, and the pressure plate 31 rises accordingly, so that the pressure plate 31 is separated from the top of each filter element 27. When the top of the support guide rod 26 slides relative to the sleeve 25 to the bottom and cannot slide and is limited, the sleeve 25 drives the movable partition plate 32 to rise through the support guide rod 26, thereby driving the filter element 27 distributed on the movable partition plate 32 to rise. Since the top of the filter element 27 has been separated from the pressure plate 31, the limit of the filter element 27 is released at this time, so as to facilitate the accelerated replacement.

[0059] A working method of a filtering system, the specific steps are as follows:

[0060] The first step is to transport the liquid material in the liquid product tank through the pipe gallery to the external liquid delivery main pipeline 10 through the pump body, and the liquid to be filtered is introduced into the main filter 1 through the external liquid delivery main pipeline 10. The pipe gallery is equipped with a flow meter to monitor the flow rate. The delivery speed is set to 35 cubic meters per hour, and the hydraulic pressure in the main filter 1 is monitored by the hydraulic pressure detector 3;

[0061] In the second step, the liquid is filtered through the precision filter element mechanism and discharged from the bottom of the main filter 1 to the strong magnetic filter. The strong magnetic filter uses 12000 Gaussian magnetic force to perform strong magnetic filtration on the liquid to remove metal particles in the liquid. That is, after being processed by two filtering devices, the precision filtration equipment and the strong magnetic filtration equipment, the impurities and metal particles contained in the liquid product meet the standards.

[0062] Step 3: After the hydraulic pressure detector 3 detects that the hydraulic pressure inside the main filter 1 exceeds the set value, the lifting drive mechanism is started and drives the precision filter element mechanism inside the main filter 1 to rise;

[0063] Step 4: The lifting drive mechanism drives the precision filter element mechanism to rise, thereby driving the flow switching drive mechanism to operate. The flow switching drive mechanism switches the external liquid delivery main pipeline 10 to be connected to the liquid inlet of the spare filter 8, and relies on the spare filter 8 to take over the main filter 1 for filtering operations.

[0064] In order to facilitate the understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is briefly described in combination with specific application scenarios:

[0065] First, the liquid to be filtered is transported to the rotating tube 11 by means of the external liquid delivery main pipeline 10, and then diverted to the side channel 20 through the main channel 22, and then enters the filter cartridge 2 of the main filter 1 through the liquid inlet pipe 6. The liquid passes through the magnetic field generated by the magnetic rod 28, and the ferromagnetic impurities of the liquid about to enter the filter element body 27 can be adsorbed by magnetic force to achieve magnetic filtration, and then further fine filtration is performed in conjunction with the filter element body 27 as a folded filter element, thereby ensuring the filtering effect, and the filtered liquid is discharged through the liquid outlet pipe 4.

[0066] When the hydraulic detector 3 detects that the pressure in the filter cartridge 2 of the main filter 1 is greater than the set value, the supporting controller controls the hydraulic telescopic rod 9 to extend. When the hydraulic telescopic rod 9 begins to extend, it drives the connecting guide rod 44 to rise relative to the connecting cross plate 42 through the positioning plate 43. At this time, the lifting cover 5 will not directly open the top of the filter cartridge 2 to prevent the filter cartridge 2 from opening directly and spraying liquid without removing the internal pressure. At this time, the linkage rack 12 drives the linkage gear 13 to rotate, and the linkage gear 13 drives the rotating tube 11 to rotate, and the rotating tube 11 drives the first columnar valve core 18 to rotate. The second columnar valve core 19 is also driven to rotate by the synchronous wheel 14 and the synchronous belt 15, and before the positioning plate 43 at the lower position rises and contacts the connecting horizontal plate 42, the first columnar valve core 18 and the second columnar valve core 19 have completed a 90-degree clockwise rotation, and the linkage rack 12 has been separated from the linkage gear 13, and the bypass channel 1 20 on the first columnar valve core 18 is disconnected from the liquid inlet pipe 6 of the main filter 1, and the bypass channel 2 21 is in a connected state with the transition pipe 41, so that the introduced liquid can enter the spare filter 8 through the transition pipe 41;

[0067] The bypass channel 1 23 on the second columnar valve core 19 is connected to the pressure relief pipe 7, and the bypass channel 2 24 is connected to the discharge pipe, so that when the internal pressure of the main filter 1 is too high, the external liquid supply main pipeline 10 is connected to the liquid inlet pipe 6 of the backup filter 8, that is, the pipeline that continues to supply liquid to the main filter 1 is disconnected. At the same time, the pressure relief pipe 7 can also be connected to the discharge pipe through the bypass channel 1 23 and the bypass channel 2 24, so as to release the liquid inside the main filter 1 and reduce its internal pressure, so as to avoid liquid spraying when disassembling the precision filter element mechanism inside the main filter 1, which may cause danger.

[0068] When the hydraulic telescopic rod 9 drives the positioning plate 43 and the connecting guide rod 44 to rise relative to the connecting cross plate 42, and the positioning plate 43 at the lower position has not yet contacted the connecting cross plate 42, the lifting cover body 5 and the filter cartridge 2 rely on the distributed U-shaped card body 36 to bite the fitting outer convex ring 35 and maintain a locked state to prevent the internal pressure of the filter cartridge 2 from dropping and the lifting cover body 5 from opening. During this process, the hydraulic telescopic rod 9 drives the linkage ring 39 to rise, and the linkage ring 39 drives the distributed movable push rods 40 to rise. When each movable push rod 40 rises to the height position where the L-shaped linkage plate 38 is located, the end of the movable push rod 40 contacts the bending position of the L-shaped linkage plate 38, and then due to the squeezing effect, The movable push rod 40 deflects relative to the linkage ring 39, thereby pushing the L-shaped linkage plate 38, and the L-shaped linkage plate 38 drives the connected U-shaped card body 36 to slide along the connecting guide rail 37 in the direction away from the lifting cover body 5, so that the U-shaped card body 36 can be separated from the fitted outer convex ring 35 to achieve unlocking. After the U-shaped card body 36 is separated from the outer convex ring 35, the positioning plate 43 at the lower position just contacts the connecting cross plate 42, and at this time, the linkage rack 12 has been separated from the linkage gear 13 in advance, and the first columnar valve core 18 and the second columnar valve core 19 have completed a clockwise rotation of 90 degrees, and then the connecting cross plate 42 drives the unlocked lifting cover body 5 to rise;

[0069] When the lifting cover 5 is lifted, it first drives the sleeve 25 to slide and lift relative to the support guide rod 26, and the pressure plate 31 is lifted accordingly, thereby facilitating the separation of the pressure plate 31 from the top of each filter element 27. When the top of the support guide rod 26 slides relative to the sleeve 25 to the bottom and cannot slide and is limited, the sleeve 25 drives the movable partition 32 to lift through the support guide rod 26, thereby driving the filter element 27 distributed on the movable partition 32 to lift. Since the top of the filter element 27 has been separated from the pressure plate 31, the limit of the filter element 27 is released at this time, thereby facilitating accelerated replacement.

[0070] Several embodiments of the present invention are described in detail above, but the embodiments of the present invention are not limited thereto and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A filtering system, comprising a main filter (1) and a spare filter (8), wherein the main filter (1) and the spare filter (8) are both provided with a precision filter element mechanism, the main filter (1) and the spare filter (8) are both provided with a liquid inlet, and the liquid inlet of the main filter (1) is connected to an external liquid supply main pipeline (10), and the main filter (1) is provided with a hydraulic detector (3); characterized in that: Also includes: A lifting drive mechanism, the lifting drive mechanism is arranged on the main filter (1), the lifting drive mechanism is electrically connected to the hydraulic detector (3), and the lifting drive mechanism drives the precision filter element mechanism inside the main filter (1) to lift; A valve switching mechanism, the valve switching mechanism is arranged between the liquid inlets of the main filter (1) and the spare filter (8), and the valve switching mechanism includes a flow direction switching drive mechanism, the flow direction switching drive mechanism is used to switch the connection state between the external liquid delivery main pipeline (10) and the main filter (1) and the spare filter (8).

2. A filtration system according to claim 1, characterized in that: The main filter (1) and the backup filter (8) both comprise a filter cartridge (2), a liquid inlet pipe (6), a liquid outlet pipe (4) and a pressure relief pipe (7); the liquid inlet pipe (6) and the pressure relief pipe (7) are both arranged on one side of the filter cartridge (2); the liquid inlet pipe (6) and the pressure relief pipe (7) of the main filter (1) are both connected to a valve switching mechanism; and the liquid outlet pipe (4) is arranged at the bottom of the filter cartridge (2).

3. A filtration system according to claim 2, characterized in that: The valve switching mechanism comprises a first steering valve, the first steering valve being arranged between a liquid inlet pipe (6) of a main filter (1) and a liquid inlet pipe (6) of a backup filter (8), a second steering valve being arranged on a pressure relief pipe (7) of the main filter (1), and a linkage mechanism being arranged between the first steering valve and the second steering valve.

4. A filtration system according to claim 3, characterized in that: The first steering valve comprises a first valve cylinder (16) and a first columnar valve core (18); one side of the first valve cylinder (16) is connected to a liquid inlet pipe (6) of a main filter (1) through a pipeline, and the other side is provided with a transition pipe (41), and the first valve cylinder (16) is connected to a liquid inlet pipe (6) of a standby filter (8) through the transition pipe (41); the first columnar valve core (18) is rotatably arranged in the first valve cylinder (16), and a first columnar valve core (18) is provided in the first valve cylinder (16). A main channel (22) is provided, one side of the main channel (22) is provided with a bypass channel 1 (20) for communicating with a liquid inlet pipe (6) of a main filter (1), and the other side is provided with a bypass channel 2 (21), and the bypass channel 2 (21) is used to communicate with a transition pipe (41), the bypass channel 1 (20) and the bypass channel 2 (21) are both communicated with the main channel (22), and one side of the main channel (22) is fixedly connected with a rotating pipe (11) that rotates synchronously with a first columnar valve core (18).

5. A filtration system according to claim 4, characterized in that: The second steering valve comprises a second valve cylinder (17) and a second columnar valve core (19); one side of the second valve cylinder (17) is connected to the pressure relief pipe (7) of the main filter (1), and a discharge pipe is arranged at the bottom of the second valve cylinder (17); the second columnar valve core (19) is rotatably connected in the second valve cylinder (17); a diverter channel 1 (23) and a diverter channel 2 (24) are provided on the second columnar valve core (19); the diverter channel 1 (23) and the diverter channel 2 (24) are connected to each other; the diverter channel 1 (23) is used to connect to the pressure relief pipe (7) of the main filter (1), and the diverter channel 2 (24) is used to connect to the discharge pipe; the linkage mechanism is connected between the steering pipe (11) and the second columnar valve core (19).

6. A filtration system according to claim 4, characterized in that: The flow direction switching drive mechanism comprises a linkage gear (13) and a linkage rack (12); the linkage rack (12) is connected to the lifting end of the lifting drive mechanism; the linkage gear (13) is coaxially connected to the rotating tube (11), and the linkage rack (12) is meshed with the linkage gear (13).

7. A filtration system according to claim 2, characterized in that: The lifting drive mechanism comprises a hydraulic telescopic rod (9) and a connecting transverse plate (42), wherein the hydraulic telescopic rod (9) is vertically fixedly connected to one side of the main filter (1), the hydraulic telescopic rod (9) is electrically connected to the hydraulic detector (3), the telescopic end of the hydraulic telescopic rod (9) is fixedly connected to a positioning plate (43), and two positioning plates (43) are provided, a connecting guide rod (44) is fixedly connected between the two positioning plates (43), and the connecting guide rod (44) slides through one end of the connecting transverse plate (42), a lifting cover body (5) is provided on the top of the main filter (1), the other end of the connecting transverse plate (42) is connected to the lifting cover body (5), and the precision filter element mechanism is connected to the lifting cover body (5).

8. A filtration system according to claim 7, characterized in that: A locking mechanism is provided between the lifting cover body (5) and the filter cartridge (2), and the locking mechanism comprises a sliding clamp, a linkage ring (39) and a movable top rod (40). The sliding clamp is provided in multiple groups and is equidistantly distributed around the lifting cover body (5). Each group of the sliding clamp comprises a connecting rail (37), a U-shaped clamp body (36) and an L-shaped linkage plate (38). The connecting rail (37) is fixedly connected to the edge of the lifting cover body (5). The U-shaped clamp body (36) is slidably connected to the connecting rail (37). A limit spring is cooperatively connected between the U-shaped clamp body (36) and the corresponding connecting rail (37). The edge of the lifting cover body (5) and the top edge of the filter cartridge (2) are locked. The edges of the two U-shaped card bodies (36) are respectively provided with outer convex rings (35) that fit together, and each of the U-shaped card bodies (36) is simultaneously engaged with two outer convex rings (35) that fit together. The L-shaped linkage plate (38) is fixedly connected to the side of the U-shaped card body (36) away from the lifting cover body (5). The linkage ring (39) is sleeved on the outside of the filter cartridge (2) of the main filter (1). The linkage ring (39) is connected to the telescopic end of the hydraulic telescopic rod (9). A plurality of movable push rods (40) are provided and are equidistantly distributed on the linkage ring (39) in the circumferential direction. One end of each movable push rod (40) is movably connected to the linkage ring (39) through a rebound hinge, and the other end is aligned with the bending position of the L-shaped linkage plate (38).

9. A filtration system according to claim 7, characterized in that: The precision filter element mechanism comprises a filter element body (27), a magnetic rod (28), a movable baffle (32), a pressure plate (31) and a sleeve (25); a support ring (33) is fixedly connected to the inner side of the filter cartridge (2) near the bottom; the movable baffle (32) is mounted on the support ring (33); a plurality of slots (34) are circumferentially opened on the movable baffle (32); and a through opening is provided at the bottom of the slot (34); the filter element body (27) is provided with a plurality of slots (34) correspondingly placed in the slots (34); a support guide rod (26) is vertically fixedly connected to the center of the movable baffle (32); The sleeve (25) is fixedly connected to the inner bottom of the lifting cover body (5), and the top of the support guide rod (26) is slidably inserted into the sleeve (25); the pressure plate (31) is fixedly connected to the sleeve (25), and the bottom surface of the pressure plate (31) is circumferentially distributed with a plurality of positioning grooves (29) around the sleeve (25); the top of each filter element (27) is fixedly connected with a positioning card plate (30), and the positioning card plate (30) is correspondingly clamped in the positioning groove (29); the outer side of each filter element (27) is circumferentially distributed with a plurality of magnetic bars (28), and the magnetic bars (28) are fixedly connected to the corresponding positioning card plate (30).

10. A working method of a filtration system, operated by a filtration system according to claim 1, characterized in that: The specific steps are as follows: The first step is to transport the liquid product to the external liquid delivery main pipeline (10) through the pump body, and the liquid product is passed into the main filter (1) through the external liquid delivery main pipeline (10), and then filtered by the precision filter element mechanism. During the transportation process, the liquid flow rate is monitored by a flow meter, and the hydraulic pressure in the main filter (1) is monitored by a hydraulic pressure detector (3); In the second step, the liquid is filtered through a precision filter element mechanism and discharged from the bottom of the main filter (1) to a strong magnetic filter for strong magnetic filtration to remove metal particles in the liquid; Step 3: After the hydraulic pressure detector (3) detects that the hydraulic pressure inside the main filter (1) exceeds the set value, the lifting drive mechanism is started and drives the precision filter element mechanism inside the main filter (1) to rise; Step 4: The lifting drive mechanism drives the precision filter element mechanism to rise, thereby driving the flow switching drive mechanism to operate. The flow switching drive mechanism switches the external liquid delivery main pipeline (10) to be connected to the liquid inlet of the backup filter (8), and relies on the backup filter (8) to replace the main filter (1) to perform filtering operations.

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