Anti-impact defoaming type return oil filter capable of blocking flow

Abstract

The invention discloses a flow-choking impact-resistant defoaming type return oil filter, and relates to the technical field of hydraulic filters, the flow-choking impact-resistant defoaming type return oil filter comprises a filter shell, an oil inlet and an oil outlet, the oil inlet and the oil outlet are formed in the two ends of the filter shell, and a cavity communicated with the oil inlet and the oil outlet is formed in the filter shell; and the connecting column is fixedly connected to the interior of the cavity, the outer wall of the connecting column is fixedly connected with a spiral track, and the spiral track is arranged on one side of the oil inlet. By arranging the switching filtering mechanism, impurities in backflow hydraulic oil are filtered out through the filtering plate, a filtering channel can be switched through the switching filtering mechanism after a period of time, then the backflow hydraulic oil can be intermittently filtered through the filtering box, and the situation that the filtering plate is blocked due to the fact that the impurities are accumulated on the filtering plate is avoided; therefore, the hydraulic oil filtering efficiency is improved, and the overall practicability of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic filters, in particular to a flow-blocking, impact-resistant and foam-removing oil return filter. Background Art

[0002] Hydraulic filters are used to filter various impurities in the hydraulic system and are indispensable devices on the pipeline for conveying medium. Among them, the return oil filter installed on the return oil pipeline at the end of the hydraulic system is used to filter out the pollutants generated or invaded in the system before returning to the hydraulic oil tank. It is an indispensable filter on power devices such as hydraulic oil tanks.

[0003] The existing return oil filter for hydraulic oil is prone to accumulate a large amount of filtered impurities in the process of use, so that the staff needs to regularly shut down the device to replace the filter during use. However, since a large amount of impurities have accumulated inside the return oil filter during the use of the device, the staff cannot replace it in time, and the return oil is prone to blockage, which in turn affects the use of the device. For this reason, we provide a flow-blocking, impact-resistant and defoaming return oil filter to solve the above problem. Summary of the invention

[0004] The purpose of the present invention is to provide a flow-blocking, impact-resistant and defoaming oil return filter in order to solve the problem that a large amount of impurities accumulate inside the oil return filter and cannot be automatically discharged, thereby affecting the filtering effect of the device.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flow-blocking, impact-resistant and defoaming oil return filter, comprising: a filter housing and an oil inlet and an oil outlet opened at both ends of the filter housing, the filter housing having a cavity communicated with the oil inlet and the oil outlet; a connecting column, the connecting column is fixedly connected to the inside of the cavity, the outer wall of the connecting column is fixedly connected with a spiral track, and the spiral track is arranged on one side of the oil inlet; a switching filter mechanism, which is arranged on the inner side of the cavity to filter the oil entering the cavity, the switching filter mechanism comprising a partition plate fixedly connected to the inner side of the cavity, the inner side of the partition plate is fixedly connected with two filter boxes, the bottom outlets of the two filter boxes are fixedly connected with a conical cylinder, and the inner outlet of the conical cylinder is fixedly connected with a filter plate; a particle removal mechanism, the particle removal mechanism is arranged on the outer wall of the filter housing to remove particles filtered by the filter plate.

[0006] As a further solution of the present invention: the switching filter mechanism also includes a limit plate fixedly connected to the inner side of the filter box, the inner side of the limit plate is slidably connected with a connecting plate, and one end of the connecting plate is set as a slope, one end of the connecting plate is fixedly connected with a first blocking plate, and one end of the first blocking plate is provided with a circular groove matching the first blocking plate, a first rectangular plate is provided at the bottom of the conical cylinder, a spherical piston rod is fixedly connected to the top of the first rectangular plate, the top of the spherical piston rod is set as a spherical surface, and a sealing component for sealing the filter plate is provided at the bottom of the conical cylinder.

[0007] As a further solution of the present invention: the blocking assembly includes a first protective shell fixedly connected to one side of the partition plate, a hydraulic cylinder is installed on the inner side of the first protective shell, an output end of the hydraulic cylinder is fixedly connected to a first telescopic rod, and one end of the first telescopic rod passes through the outside of the first protective shell, a second telescopic rod is slidably connected to the inner side of the first telescopic rod, a second blocking plate is fixedly connected to the top of the second telescopic rod, a compression spring is installed between the second blocking plate and the first telescopic rod, and a driving assembly for driving the other first rectangular plate to move is provided on the inner side of the first protective shell.

[0008] As a further solution of the present invention: the driving assembly includes a first spur rack fixedly connected to the outer wall of the first telescopic rod, the inner side of the first protective shell is rotatably connected to the first rotating rod, the outer wall of the first rotating rod is fixedly connected to a spur gear, and the spur gear is meshed with the first spur rack, one side of another first rectangular plate is fixedly connected to a second rectangular plate, the top of the second rectangular plate is fixedly connected to a connecting rod, the top of the connecting rod is fixedly connected to a second spur rack, and the second spur rack is meshed with the spur gear.

[0009] As a further solution of the present invention: the particle removal mechanism includes an impurity suction barrel fixedly connected to the top of the filter housing, a three-way pipe is arranged on the inner side of the cavity, the three-way pipe is arranged with three ports, two ports of the three-way pipe are respectively installed on one side of the two filter boxes, and the other port of the three-way pipe is installed at the feed port of the impurity suction barrel, a third protective shell is fixedly connected to the inner side of the impurity suction barrel, a second suction pump is installed on the inner side of the third protective shell, the input end of the second suction pump is connected to the three-way pipe, the output end of the second suction pump is fixedly connected to the output pipe, and the inner side of the impurity suction barrel is threadedly connected with a filter sleeve.

[0010] As a further scheme of the present invention: the particle removal mechanism also includes a connecting seat fixedly connected to the inner side of the filter box, the outer wall of the connecting seat is slidably connected to the limited seat, the bottom of the limit seat is fixedly connected to a circular cover plate, the inner side of the connecting seat is rotatably connected to a second rotating rod, a torsion spring is installed between the second rotating rod and the connecting seat, one end of the second rotating rod passes through the outside of the connecting seat and is fixedly connected to a rotating plate, one side of the rotating plate is fixedly connected to a third rotating rod, a rectangular groove is provided on the inner side of the circular cover plate, a sliding bar is slidably connected to the inner side of the rectangular groove, and the sliding bar is rotatably connected to the third rotating rod, a suction pipe is installed on the inner side of the circular cover plate, the output end of the suction pipe is connected to a hose, and one end of the hose is fixedly connected to the three-way pipe, one side of the connecting seat is fixedly connected to a second protective shell with a diameter matching the second rotating rod, and the inner side of the cavity is provided with a discharge component for discharging oil inside the impurity suction barrel.

[0011] As a further solution of the present invention: the discharge assembly includes a power rod fixedly connected to the top of the first rectangular plate, a trapezoidal block is fixedly connected to the top of the power rod, a connecting pipe that penetrates the inner side of the cavity is installed at the bottom discharge port of the impurity suction barrel, a connecting strip is fixedly connected to the inner side of the cavity, one end of the connecting strip is fixedly connected to a third telescopic tube, the inner side of the third telescopic tube is slidably connected to a fourth telescopic tube, one end of the fourth telescopic tube is fixedly connected to a rectangular block, a telescopic spring is installed between the rectangular block and the connecting strip, and one end of the rectangular block is fixedly connected to a spherical rod.

[0012] As a further solution of the present invention: one end of the spherical rod is arranged as a spherical surface, and one end of the spherical rod is arranged as an arched surface.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. By setting a switching filter mechanism, impurities in the refluxed hydraulic oil are filtered out through the filter plate. After a period of time, the filter channel can be switched by switching the filter mechanism, so that the filter box can intermittently filter the refluxed hydraulic oil to avoid the accumulation of impurities on the filter plate to block it, thereby improving the filtration efficiency of the hydraulic oil and thus improving the overall practicality of the device;

[0015] 2. By setting up the cooperation of the second suction pump and other parts, when one of the two filter boxes is blocked, the hydraulic oil containing impurities in the filter box that has filtered out impurities can be sucked into the impurity suction barrel for secondary treatment through the second suction pump, thereby avoiding waste of resources and ensuring the continuous use of the filter box;

[0016] 3. By setting up a particle removal mechanism, the circular cover plate can cover the feed port on the inner side of the conical cylinder filled with impurities, so that the suction pipe can be close to the filter plate, thereby improving the suction effect of impurities on the inner side of the conical cylinder and improving the overall practicality of the device;

[0017] 4. By arranging the cooperation of the rectangular plate and other parts, the rectangular block is reset, so that when the spherical surface on one side of the spherical rod and the bottom of the arched inclined surface at the bottom of the trapezoidal block are at the bottom, the discharge port at the bottom of the connecting pipe is closed, so that the device can filter the impurities subsequently sucked into the inner side of the impurity suction barrel, and return to the inner side of the filter housing after a period of time, so that the impurities extracted from the inside of the filter housing are automatically processed, ensuring that there is no excessive hydraulic oil in the impurity suction barrel, so that the device can be used continuously;

[0018] 5. By setting up the coordination of parts such as spiral tracks, the spiral track is composed of dense grid-state filters. When the hydraulic oil refluxes from the spillway of the hydraulic system enters the filter housing through the oil inlet, it is first buffered by the spiral track to reduce the impact caused by the reflux of the hydraulic oil. In the hydraulic system, the oil in the return oil is prone to produce bubbles (foam) due to factors such as high flow rate and gas-liquid mixing. The role of the grid-state filter: the grid filter provides multiple contact points in the spiral track. When the oil passes through the grid, the bubbles are broken in contact with the filter surface. The spiral flow causes the bubbles to be decomposed during the grid contact process, and the gas is released to the outside of the oil, thereby reducing the foam in the oil. Since the spiral track extends the flow path of the oil, the bubbles have more time to break and separate, thereby reducing the erosion of the subsequent filter elements by the foam, thereby improving the fluidity of the subsequent oil filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 is a cross-sectional view of the present invention;

[0021] Figure 3 A cross-sectional view of a switching filter mechanism of the present invention;

[0022] Figure 4 A cross-sectional view of a particle removal mechanism of the present invention;

[0023] Figure 5 It is a schematic diagram of the rotating plate structure of the present invention;

[0024] Figure 6 is a cross-sectional view of a second protective shell of the present invention;

[0025] Figure 7 is a cross-sectional view of a first telescopic rod of the present invention;

[0026] Figure 8 It is a schematic diagram of the first straight rack structure of the present invention;

[0027] Fig. 9 It is a cross-sectional view of the impurity suction barrel of the present invention;

[0028] Fig.10 It is a cross-sectional view of the third telescopic tube and the fourth telescopic tube of the present invention.

[0029] In the figure: 1, filter housing; 2, oil inlet; 3, spiral track; 4, connecting column; 5, cavity; 6, oil outlet; 701, partition plate; 702, filter box; 703, conical cylinder; 704, first rectangular plate; 705, first protective shell; 706, first blocking plate; 707, connecting plate; 708, limit plate; 709, spherical piston rod; 710, first telescopic rod; 711, hydraulic cylinder; 712, second telescopic rod; 713, second blocking plate; 714, compression spring; 715, filter plate; 716, first straight rack; 717, spur gear; 718, second straight rack; 719, first rotating rod; 720, second rectangular plate; 721, connecting rod; 8 01. Impurity suction barrel; 802. Three-way pipe; 803. Rotating plate; 804. Connecting seat; 805. Limiting seat; 806. Sliding bar; 807. Rectangular groove; 808. Circular cover plate; 809. Second rotating rod; 810. Second protective shell; 811. Torsion spring; 812. Second suction pump; 813. Third protective shell; 814. Output pipe; 815. Power rod; 816. Trapezoidal block; 817. Suction pipe; 818. Connecting strip; 819. Spherical rod; 820. Rectangular block; 821. Connecting pipe; 822. Third telescopic tube; 823. Fourth telescopic tube; 824. Telescopic spring; 825. Third rotating rod; 826. Hose; 827. Filter sleeve. DETAILED DESCRIPTION

[0030] 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.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0032] Example 1

[0033] See also Figures 1 to 10 , the present embodiment provides a flow-blocking, impact-resistant and defoaming oil return filter, comprising: a filter housing 1 and an oil inlet 2 and an oil outlet 6 provided at both ends of the filter housing 1, a cavity 5 communicating with the oil inlet 2 and the oil outlet 6 is provided inside the filter housing 1; a connecting column 4, the connecting column 4 is fixedly connected to the inside of the cavity 5, a spiral track 3 is fixedly connected to the outer wall of the connecting column 4, and the spiral track 3 is arranged on one side of the oil inlet 2; a switching filter mechanism is arranged on the inner side of the cavity 5, and the oil entering the cavity 5 is filtered, the switching filter mechanism comprises a partition plate 701 fixedly connected to the inner side of the cavity 5, two filter boxes 702 are fixedly connected to the inner side of the partition plate 701, a conical cylinder 703 is fixedly connected to the bottom discharge port of the two filter boxes 702, and a filter plate 715 is fixedly connected to the inner discharge port of the conical cylinder 703;

[0034] The spiral track 3 is composed of a dense mesh filter. When the hydraulic oil of the spillway of the hydraulic system flows back through the oil inlet 2 and enters the filter housing 1, it is first buffered by the spiral track 3 to reduce the impact caused by the hydraulic oil return. In the hydraulic system, the oil in the return oil is prone to bubbles (foam) due to factors such as high flow rate and gas-liquid mixing. The role of the mesh filter: the mesh filter provides multiple contact points in the spiral track. When the oil passes through the mesh, the bubbles are broken when in contact with the filter surface. The spiral flow causes the bubbles to be decomposed during the mesh contact process, and the gas is released to the outside of the oil, thereby reducing the foam in the oil. Since the spiral track 3 extends the flow path of the oil, the bubbles have more time to break and separate, thereby reducing the erosion of the subsequent filter elements by the foam, thereby improving the fluidity of the subsequent oil filtration;

[0035] When the hydraulic oil returning through the buffering and foam elimination operation is OK, it can be filtered through the filter plate 715 inside the filter box 702;

[0036] Example 2

[0037] The switching filter mechanism also includes a limit plate 708 fixedly connected to the inner side of the filter box 702, a connecting plate 707 is slidably connected to the inner side of the limit plate 708, and one end of the connecting plate 707 is set as a slope, one end of the connecting plate 707 is fixedly connected to the first blocking plate 706, and one end of the first blocking plate 706 is provided with a circular groove matching the first blocking plate 706, a first rectangular plate 704 is provided at the bottom of the conical cylinder 703, a spherical piston rod 709 is fixedly connected to the top of the first rectangular plate 704, and the top of the spherical piston rod 709 is set as a spherical surface, and a blocking component for blocking the filter plate 715 is provided at the bottom of the conical cylinder 703

[0038] The blocking assembly includes a first protective shell 705 fixedly connected to one side of the partition plate 701, a hydraulic cylinder 711 is installed on the inner side of the first protective shell 705, a first telescopic rod 710 is fixedly connected to the output end of the hydraulic cylinder 711, and one end of the first telescopic rod 710 passes through the outside of the first protective shell 705, a second telescopic rod 712 is slidably connected to the inner side of the first telescopic rod 710, a second blocking plate 713 is fixedly connected to the top of the second telescopic rod 712, a compression spring 714 is installed between the second blocking plate 713 and the first telescopic rod 710, and a first rectangular spring 714 is installed on the inner side of the first protective shell 705 to drive another first rectangular spring 714. The driving assembly for moving the plate 704 includes a first spur rack 716 fixedly connected to the outer wall of the first telescopic rod 710, a first rotating rod 719 is rotatably connected to the inner side of the first protective shell 705, a spur gear 717 is fixedly connected to the outer wall of the first rotating rod 719, and the spur gear 717 is meshed with the first spur rack 716, and a second rectangular plate 720 is fixedly connected to one side of the other first rectangular plate 704, a connecting rod 721 is fixedly connected to the top of the second rectangular plate 720, and a second spur rack 718 is fixedly connected to the top of the connecting rod 721, and the second spur rack 718 is meshed with the spur gear 717;

[0039] The hydraulic cylinder 711 is controlled by a PLC, and the intermittent start of the hydraulic cylinder 711 can be controlled by the PLC control. After the reflux hydraulic oil is filtered from one of the filter boxes 702 for a period of time, the PLC controller controls the hydraulic cylinder 711 to start, so that the output end of the hydraulic cylinder 711 drives the first telescopic rod 710 to move downward, thereby driving the first rectangular plate 704 to move downward, thereby driving the spherical piston rod 709 to move downward. When the spherical piston rod 709 is separated from the connecting plate 707, the connecting plate 707 is pushed to move to the circular groove away from the side of the filter box 702 under the pressure of the external reflux hydraulic oil. At this time, the connecting plate 707 can completely open the circular groove inside the filter box 702, so that the reflux hydraulic oil can enter the inner side of the filter box 702 for filtration. When the first telescopic rod 710 moves downward, At the same time, the first spur rack 716 will be driven to move downward, thereby driving the spur gear 717 to rotate, thereby driving the second spur rack 718 to drive the second rectangular plate 720 to move upward, so that the other first rectangular plate 704 can move upward, so that the other spherical piston rod 709 moves upward and contacts the slope on one side of the other connecting plate 707, thereby pushing the other connecting plate 707 to drive the other connecting plate 707 to move to the circular groove on one side of the other filter box 702, and the circular groove on one side of the other filter box 702 can be blocked, so that the filter channel can be switched, so that the filter box 702 can perform intermittent filtering on the refluxed hydraulic oil, thereby improving the overall filtering efficiency of the device, avoiding blockage inside one of the filter boxes 702 that affects the subsequent filtering effect, thereby improving the overall practicality of the device;

[0040] When the first telescopic rod 710 begins to move downward, the compression spring 714 is in a compressed state at this time, and gradually resets as the first telescopic rod 710 gradually moves, and the other first blocking plate 706 blocks the circular groove inside the other filter box 702, at this time the compression spring 714 resets to the initial position and fits against the bottom of the filter plate 715 located above, and the first telescopic rod 710 continues to move downward, thereby driving the second blocking plate 713 to move downward, thereby opening the filter port inside the conical tube 703 located above the hydraulic cylinder 711, and when the first telescopic rod 710 begins to move downward, at this time the other first rectangular plate 704 can drive the other first telescopic rod 710 to move upward, and when the other connecting plate 707 blocks the circular groove inside the other filter box 702, ... 02 is blocked, at this time, another second blocking plate 713 located under the hydraulic cylinder 711 can block the filter port inside the other conical cylinder 703, thereby ensuring that the openings of the two groups of filter boxes 702 will not be fully opened, thereby facilitating the cleaning of the other blocked filter box 702. Through the ingenious design of mechanical components, the two groups of filter boxes 702 and the filter ports of the filter plates 715 inside them are alternately used and cleaned. When one group of filter components is in use, the other group can be safely blocked and cleaned, thereby improving the efficiency and reliability of the filtration system. Since one group of filter components is always in a closed state, this can prevent impurities or particulate matter from entering the system during the cleaning process, avoiding possible blockage problems, thereby improving the stability and reliability of the device.

[0041] Example 3

[0042] A particle removal mechanism, which includes an impurity suction barrel 801 fixedly connected to the top of the filter housing 1, a three-way pipe 802 is provided on the inner side of the cavity 5, and the three-way pipe 802 is provided with three ports, wherein two ports of the three-way pipe 802 are respectively installed on one side of the two filter boxes 702, and a port of the other three-way pipe 802 is installed at the feed port of the impurity suction barrel 801, a third protective shell 813 is fixedly connected to the inner side of the impurity suction barrel 801, a second suction pump 812 is installed on the inner side of the third protective shell 813, an input end of the second suction pump 812 is connected to the three-way pipe 802, an output end of the second suction pump 812 is fixedly connected to an output pipe 814, and a filter sleeve 827 is threadedly connected to the inner side of the impurity suction barrel 801;

[0043] The particle removal mechanism also includes a connection seat 804 fixedly connected to the inner side of the filter box 702, the outer wall of the connection seat 804 is slidably connected to a limit seat 805, the bottom of the limit seat 805 is fixedly connected to a circular cover plate 808, the inner side of the connection seat 804 is rotatably connected to a second rotating rod 809, a torsion spring 811 is installed between the second rotating rod 809 and the connection seat 804, one end of the second rotating rod 809 passes through the outside of the connection seat 804 and is fixedly connected to a rotating plate 803, one side of the rotating plate 803 is fixedly connected to a third rotating rod 825, and the circular cover plate A rectangular groove 807 is provided on the inner side of 808, a sliding bar 806 is slidably connected to the inner side of the rectangular groove 807, and the sliding bar 806 is rotatably connected to the third rotating rod 825, a suction pipe 817 is installed on the inner side of the circular cover plate 808, a hose 826 is connected to the output end of the suction pipe 817, and one end of the hose 826 is fixedly connected to the three-way pipe 802, a second protective shell 810 with a diameter matching the second rotating rod 809 is fixedly connected to one side of the connecting seat 804, and a discharge component for discharging the oil inside the impurity suction barrel 801 is provided on the inner side of the cavity 5;

[0044] When the other first blocking plate 706 at the bottom of the hydraulic cylinder 711 blocks the circular groove inside the other filter box 702, the output end of the hydraulic cylinder 711 continues to contract, causing the other spherical piston rod 709 to continue to move upward. When the spherical surface at the top of the other spherical piston rod 709 contacts the bottom surface of the other rotating plate 803, the other rotating plate 803 is pushed to rotate along the other second rotating rod 809 under the action of the other spherical piston rod 709, thereby driving the other sliding bar 806 to move downward, so that the other circular cover plate 808 moves toward the direction of the other conical cylinder 703, so that the other circular cover plate 808 can cover the feed port inside the other conical cylinder 703, so that the suction pipe 817 can be close to the filter plate 715, thereby improving the suction effect of the impurities inside the conical cylinder 703 and improving the overall practicality of the device.

[0045] When the spherical piston rod 709 moves downward, the pressure on the torsion spring 811 above the hydraulic cylinder 711 gradually decreases, which can push the rotating plate 803 to reset, so that the circular cover plate 808 is reset, so that the feed port on the top of the conical cylinder 703 can be opened, thereby realizing the opening and closing of the inner side of the conical cylinder 703, so that the device can more conveniently suck the impurities on the top of the filter plate 715;

[0046] Two of the pipe openings of the three-way pipe 802 are connected to a hose 826 port through solenoid valves, respectively. The two solenoid valves are controlled by the PLC controller to open alternately. When the circular cover plate 808 moves to the feed port at the top of the conical cylinder 703 and completely blocks the feed port at the top of the conical cylinder 703, the PLC controller controls one of the solenoid valves to open, and at the same time the second suction pump 812 is started to suck the hydraulic oil containing impurities on the filter plate 715 to be cleaned into the impurity suction barrel 801 and filter it through the filter sleeve 827, so that the impurities will not block the filter plate 715, and the filter plate 715 can continue to filter the refluxed hydraulic oil, thereby improving the overall practicality of the device;

[0047] The staff can regularly dismantle the filter sleeve 827 filled with impurities for replacement without shutting down the equipment for cleaning operations, thereby improving the overall practicality of the device.

[0048] Example 4

[0049] The discharge assembly includes a power rod 815 fixedly connected to the top of the first rectangular plate 704, a trapezoidal block 816 fixedly connected to the top of the power rod 815, a connecting pipe 821 that penetrates to the inner side of the cavity 5 is installed at the bottom discharge port of the impurity suction barrel 801, a connecting strip 818 is fixedly connected to the inner side of the cavity 5, one end of the connecting strip 818 is fixedly connected to a third telescopic tube 822, the inner side of the third telescopic tube 822 is slidably connected to a fourth telescopic tube 823, one end of the fourth telescopic tube 823 is fixedly connected to a rectangular block 820, a telescopic spring 824 is installed between the rectangular block 820 and the connecting strip 818, one end of the rectangular block 820 is fixedly connected to a spherical rod 819, one end of the spherical rod 819 is set to a spherical surface, and one end of the spherical rod 819 is set to an arched surface.

[0050] When the first rectangular plate 704 moves downward, it will drive the trapezoidal block 816 to move downward, so that the spherical rod 819 is pushed by the inclined surface at one end of the trapezoidal block 816 to move toward the side of the connecting strip 818, so that the rectangular block 820 can move toward the side of the connecting strip 818. When the spherical rod 819 separates from the inclined surface on one side of the trapezoidal block 816 and abuts against the plane on one side of the trapezoidal block 816, the rectangular block 820 can open the discharge port at the bottom of the connecting pipe 821, so that the hydraulic oil filtered again in the impurity suction barrel 801 can be discharged. It flows back to the inner side of the cavity 5, thereby ensuring that the hydraulic oil with impurities can continue to enter the inside of the filter sleeve 827, thereby not affecting the operation of the device. Since there is a plane in the middle of the trapezoidal block 816, the discharge port of the connecting pipe 821 can be in an open state for a certain period of time. When the trapezoidal block 816 is separated from the spherical rod 819, the rectangular block 820 will be pushed to reset under the action of the telescopic spring 824, so that the discharge port at the bottom of the connecting pipe 821 is closed when the spherical surface on one side of the spherical rod 819 and the bottom of the arched inclined surface at the bottom of the trapezoidal block 816 are at the bottom.

[0051] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A flow-blocking, impact-resistant and defoaming oil return filter, characterized in that: include: A filter housing (1) and an oil inlet (2) and an oil outlet (6) provided at two ends of the filter housing (1); a cavity (5) communicating with the oil inlet (2) and the oil outlet (6) is provided inside the filter housing (1); A connecting column (4), the connecting column (4) being fixedly connected to the interior of the cavity (5), the outer wall of the connecting column (4) being fixedly connected to a spiral track (3), and the spiral track (3) being arranged on one side of the oil inlet (2); A switching filter mechanism is arranged on the inner side of the cavity (5) and filters the oil entering the cavity (5), the switching filter mechanism comprising a partition plate (701) fixedly connected to the inner side of the cavity (5), two filter boxes (702) are fixedly connected to the inner side of the partition plate (701), a conical cylinder (703) is fixedly connected at the bottom discharge port of each of the two filter boxes (702), and a filter plate (715) is fixedly connected at the inner discharge port of the conical cylinder (703); A particle removal mechanism, the particle removal mechanism is arranged on the outer wall of the filter housing (1) and is used to remove particles filtered by the filter plate (715).

2. The flow-blocking, impact-resistant and defoaming oil return filter according to claim 1 is characterized in that: The switching filter mechanism also includes a limit plate (708) fixedly connected to the inner side of the filter box (702), the inner side of the limit plate (708) is slidably connected to a connecting plate (707), and one end of the connecting plate (707) is set as a slope, one end of the connecting plate (707) is fixedly connected to a first blocking plate (706), and one end of the first blocking plate (706) is provided with a circular groove matching the first blocking plate (706), the bottom of the conical cylinder (703) is provided with a first rectangular plate (704), the top of the first rectangular plate (704) is fixedly connected to a spherical piston rod (709), the top of the spherical piston rod (709) is set as a spherical surface, and the bottom of the conical cylinder (703) is provided with a blocking component for blocking the filter plate (715).

3. The flow-blocking, impact-resistant and defoaming oil return filter according to claim 2 is characterized in that: The blocking component comprises a first protective shell (705) fixedly connected to one side of the partition plate (701); a hydraulic cylinder (711) is installed on the inner side of the first protective shell (705); an output end of the hydraulic cylinder (711) is fixedly connected to a first telescopic rod (710), and one end of the first telescopic rod (710) passes through the outside of the first protective shell (705); a second telescopic rod (712) is slidably connected to the inner side of the first telescopic rod (710); a second blocking plate (713) is fixedly connected to the top of the second telescopic rod (712); a compression spring (714) is installed between the second blocking plate (713) and the first telescopic rod (710); and a driving component for driving another of the first rectangular plates (704) to move is provided on the inner side of the first protective shell (705).

4. The flow-blocking, impact-resistant and defoaming oil return filter according to claim 3 is characterized in that: The driving assembly includes a first spur rack (716) fixedly connected to the outer wall of the first telescopic rod (710); the inner side of the first protective shell (705) is rotatably connected to a first rotating rod (719); the outer wall of the first rotating rod (719) is fixedly connected to a spur gear (717), and the spur gear (717) is meshed with the first spur rack (716); one side of another first rectangular plate (704) is fixedly connected to a second rectangular plate (720); the top of the second rectangular plate (720) is fixedly connected to a connecting rod (721); the top of the connecting rod (721) is fixedly connected to a second spur rack (718), and the second spur rack (718) is meshed with the spur gear (717).

5. The flow-blocking, impact-resistant and defoaming oil return filter according to claim 2 is characterized in that: The particle removal mechanism comprises an impurity suction barrel (801) fixedly connected to the top of the filter housing (1); a three-way pipe (802) is arranged on the inner side of the cavity (5); the three-way pipe (802) is provided with three ports, wherein two ports of the three-way pipe (802) are respectively installed on one side of the two filter boxes (702), and another port of the three-way pipe (802) is installed at the feed port of the impurity suction barrel (801); a third protective shell (813) is fixedly connected to the inner side of the impurity suction barrel (801); a second suction pump (812) is installed on the inner side of the third protective shell (813); an input end of the second suction pump (812) is connected to the three-way pipe (802); an output end of the second suction pump (812) is fixedly connected to an output pipe (814); and a filter sleeve (827) is threadedly connected to the inner side of the impurity suction barrel (801).

6. The flow-blocking, impact-resistant and defoaming oil return filter according to claim 5, characterized in that: The particle removal mechanism also includes a connecting seat (804) fixedly connected to the inner side of the filter box (702); the outer wall of the connecting seat (804) is slidably connected to a limit seat (805); the bottom of the limit seat (805) is fixedly connected to a circular cover plate (808); the inner side of the connecting seat (804) is rotatably connected to a second rotating rod (809); a torsion spring (811) is installed between the second rotating rod (809) and the connecting seat (804); one end of the second rotating rod (809) passes through the outside of the connecting seat (804) and is fixedly connected to a rotating plate (803); one side of the rotating plate (803) is fixedly connected to a third rotating rod (825); the circular cover plate (811) is fixedly connected to the inner side of the connecting seat (804); A rectangular groove (807) is provided on the inner side of the rectangular groove (807), a sliding bar (806) is slidably connected to the inner side of the rectangular groove (807), and the sliding bar (806) is rotatably connected to the third rotating rod (825), a suction pipe (817) is installed on the inner side of the circular cover plate (808), the output end of the suction pipe (817) is connected to a hose (826), and one end of the hose (826) is fixedly connected to the three-way pipe (802), one side of the connecting seat (804) is fixedly connected to a second protective shell (810) whose diameter matches the second rotating rod (809), and a discharge component for discharging the oil inside the impurity suction barrel (801) is provided on the inner side of the cavity (5).

7. The flow-blocking, impact-resistant and defoaming oil return filter according to claim 6 is characterized in that: The discharge assembly comprises a power rod (815) fixedly connected to the top of the first rectangular plate (704), a trapezoidal block (816) being fixedly connected to the top of the power rod (815), a connecting pipe (821) penetrating to the inner side of the cavity (5) being installed at the bottom discharge port of the impurity suction barrel (801), a connecting strip (818) being fixedly connected to the inner side of the cavity (5), one end of the connecting strip (818) being fixedly connected to a third telescopic tube (822), the inner side of the third telescopic tube (822) being slidably connected to a fourth telescopic tube (823), one end of the fourth telescopic tube (823) being fixedly connected to a rectangular block (820), a telescopic spring (824) being installed between the rectangular block (820) and the connecting strip (818), and one end of the rectangular block (820) being fixedly connected to a spherical rod (819).

8. The flow-blocking, impact-resistant and defoaming oil return filter according to claim 7, characterized in that: One end of the spherical rod (819) is arranged as a spherical surface, and one end of the spherical rod (819) is arranged as an arched surface.

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