Hydraulic filter, filtering system and filtering method

Abstract

The invention relates to the technical field of filters, and provides a hydraulic filter, a filtering system and a filtering method.The hydraulic filter comprises a shell, the shell is provided with a first partition plate, and the first partition plate divides the interior of the shell into a first cavity and a second cavity; the first rotating disc is rotationally arranged on the first partition plate, and after the first rotating disc rotates, the first cavity communicates with or does not communicate with the second cavity; the stirring disc is rotationally arranged in the first cavity and located at the bottom of the first cavity, and the stirring disc is provided with a dirt accumulation groove; the dirt scraping box is vertically arranged in the first cavity in a sliding mode, the dirt scraping box is located in the first cavity or the second cavity after the dirt scraping box slides, and a first guide plate is arranged at one end of the dirt scraping box and used for being connected with the dirt accumulation groove in an abutting mode. By means of the technical scheme, the problem that in the prior art, impurities which are prone to floating on the oil surface and solid granular substances which are prone to precipitation in hydraulic oil are discharged respectively, and consequently the filtering efficiency is low is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of filters, and in particular to a hydraulic filter, a filtering system and a filtering method. Background Art

[0002] At present, in hydraulic systems, due to various reasons, impurities are inevitably present in the hydraulic oil used. If these impurities cannot be removed in time, serious consequences will occur during the normal operation of the system. These impurities will contaminate other actuators, causing system parts to malfunction, lose control, or even be damaged, greatly affecting the reliability and stability of the hydraulic system.

[0003] Different types of impurities may appear in hydraulic oil. On the one hand, there are some impurities that easily float on the surface of hydraulic oil, such as emulsified oil. The presence of emulsified oil will reduce the performance of hydraulic oil and affect the normal operation of the system. On the other hand, there will also be some metal particles with a density greater than that of hydraulic oil. These metal particles may be caused by wear and corrosion of system components. When they flow in the hydraulic system, they will cause serious wear and damage to hydraulic components.

[0004] When filtering these two substances, the existing technology usually separates the two substances and then discharges them separately. Although this method can remove impurities to a certain extent, it has obvious shortcomings. First, this method has low filtering efficiency and needs to handle different types of impurities separately, which consumes time and energy. Secondly, the process of handling the two impurities separately is relatively complicated, requiring the use of multiple filtering devices and complex process flows, which increases the cost and maintenance difficulty of the system. In addition, this method may not be able to completely remove all impurities, especially for some tiny impurity particles, the filtering effect is not ideal. Summary of the invention

[0005] The present invention provides a hydraulic filter, a filtering system and a filtering method, which solve the problem in the related art that impurities easily floating on the oil surface and solid granular substances easily precipitated in the hydraulic oil are discharged separately, resulting in low filtering efficiency.

[0006] The technical solution of the present invention is as follows: Hydraulic filter, including: A housing, wherein the housing has a first partition plate, and the first partition plate divides the interior of the housing into a first cavity and a second cavity; a first rotating disk, the first rotating disk being rotatably disposed on the first partition plate, and after the first rotating disk rotates, the first cavity and the second cavity are connected or disconnected; A stirring plate, the stirring plate is rotatably disposed in the first cavity and located at the bottom of the first cavity, and the stirring plate has a dirt storage groove; A scraper box is vertically slidably arranged in the first cavity. After the scraper box slides, the scraper box is located in the first cavity or the second cavity. One end of the scraper box has a first guide plate, and the first guide plate is used to abut against the dirt storage groove.

[0007] Optionally, the shell has a first liquid inlet, a first liquid outlet and a second liquid outlet, the first liquid inlet and the first liquid outlet are both connected to the first cavity, the second liquid outlet is connected to the second cavity, and the first liquid outlet is located at the bottom of the shell and coincides with the center of the shell.

[0008] Optionally, the stirring disc further has a first inner tooth, and further comprises: The fan blades are multiple in number and are evenly spaced and arranged on the stirring disk along the axis of the housing; A first driving member, wherein the first driving member is disposed on the outer wall of the shell, and an output end of the first driving member is located in the first cavity and meshes with the first internal teeth.

[0009] Optionally, it also includes: An air injection pipe, one end of which is located in the first cavity and the other end of which extends out of the shell.

[0010] Optionally, the stirring disc further has a first cone tooth, and further comprises: a first transmission wheel, the first transmission wheel is rotatably and slidably arranged on the housing, one end of the first transmission wheel has a second bevel tooth, after the first transmission wheel slides, the second bevel tooth is meshed with or disengaged from the first bevel tooth, the first transmission wheel also has a worm gear tooth; a first mounting rod, the first mounting rod being vertically disposed in the first cavity; A transmission rod, the transmission rod is rotatably sleeved on the first mounting rod, the transmission rod has worm teeth, the worm teeth are meshed with the worm wheel teeth, and the first transmission wheel rotates to drive the transmission rod to rotate; A sliding block is vertically slidably arranged in the first cavity, one end of the sliding block is threadedly connected to the transmission rod, and the scraper box is vertically slidably arranged at the other end of the sliding block.

[0011] Optionally, the first partition plate has a first opening, the first partition plate also has a first channel, the first channel coincides with the first opening, the first rotating disk has a second opening, the first opening coincides with the second opening after the first rotating disk rotates, and the scraping box comprises: A box body, one end of the box body is slidably arranged on the sliding block away from the end of the transmission rod, and the first guide plate is located at the other end of the box body; A first rotating plate, the first rotating plate is rotatably arranged on one end of the box body close to the sliding block, and after the first rotating plate rotates, it forms a plane with the bottom of the box body or is perpendicular to each other; A second rotating plate, one end of which is rotatably arranged on the box body away from the end of the sliding block, and after the second rotating plate rotates, the other end of the second rotating plate abuts against or does not abut against the bottom of the box body; a first torsion spring, which is arranged at the rotational connection between the first rotating plate and the box body, and is used to provide a rotational force for the first rotating plate and the bottom of the box body to form a plane. After the scraper box passes through the first channel and is located in the second cavity, and slides to the uppermost end of the sliding block, the first rotating plate and the sliding block are released from abutment, and the first torsion spring drives the first rotating plate and the box body to form a plane; The second torsion spring is arranged at the rotation connection between the second rotating plate and the box body, and is used to provide a rotation force for the other end of the second rotating plate to abut against the bottom of the box body.

[0012] Optionally, it also includes: a first telescopic member, the first telescopic member being disposed in the second cavity; A scraper is provided at the extended end of the first telescopic member. After the first telescopic member is extended, the scraper abuts against the bottom of the box body.

[0013] Optionally, it also includes: The second rotating disk is rotatably disposed at the bottom of the first cavity, and after the second rotating disk rotates, the first liquid outlet is closed or opened.

[0014] A filtration system, using the hydraulic filter, comprising: a shuttle valve, the shuttle valve being in communication with the first liquid inlet; a reversing valve, the reversing valve being in communication with the first liquid outlet; a first three-way valve, the first three-way valve being in communication with the reversing valve; a second three-way valve, the second three-way valve being communicated with the reversing valve, and the first three-way valve and the second three-way valve being used to be connected with the actuator; a third three-way valve, the third three-way valve being in communication with the shuttle valve; a first one-way valve, one end of which is connected to the first three-way valve, and the other end of which is connected to the third three-way valve; a fourth three-way valve, the fourth three-way valve being in communication with the shuttle valve; a second one-way valve, one end of which is connected to the second three-way valve and the other end of which is connected to the fourth three-way valve; a third one-way valve, one end of which is connected to the hydraulic filter, and the other end of which is connected to the reversing valve; A fifth three-way valve, one end of which is communicated with the fourth three-way valve, and the other end of which is communicated with the reversing valve.

[0015] Filtration method, using the filtration system.

[0016] The working principle and beneficial effects of the present invention are: In the present invention, the first partition plate is vertically installed inside the shell, dividing the shell into a first cavity and a second cavity. The first rotating disk rotates on the first partition plate, and can control the connection state between the first cavity and the second cavity. The stirring disk is located at the bottom of the first cavity. The shape of the stirring disk is optimized and can fully stir the hydraulic oil in the first cavity to form a vortex when rotating. A dirt storage groove is provided on the edge of the stirring disk. When the stirring disk stirs the hydraulic oil, the centrifugal force is used to throw the impurities to the inner wall of the shell 1. After the impurities are precipitated, they will fall into the dirt storage groove, thereby filtering large particles of impurities. The scraper box is installed in the first cavity through a reliable vertical sliding device. A first guide plate is provided at one end of the scraper box, which is tightly matched with the dirt storage groove. When the stirring disk rotates, the scraper box can smoothly scrape the impurities in the dirt storage groove into the scraper box. The scraper box can slide vertically in the shell to accurately transport the collected impurities to the second cavity.

[0017] The advantage is that the first rotating disk can timely seal the impurities floating on the oil surface, thus enhancing the filtering effect. The scraper box cooperates with the first guide plate to clean the dirt trough, and then transports the impurities to the second cavity through vertical sliding, thus achieving unified treatment of different types of impurities, avoiding the tediousness of separate treatment, improving work efficiency, making the filtering system easier to operate, reducing maintenance costs and operating difficulties, and improving the practicality and reliability of the hydraulic filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 It is a cross-sectional view of the internal structure of the present invention; Figure 4 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 5 For the present invention Figure 2 Enlarged view of point B in the middle; Figure 6 This is a schematic diagram of the structure of the dirt scraping box of the present invention; Figure 7 It is a partial structural cross-sectional view of the dirt scraping box of the present invention; Figure 8 It is an enlarged view of the local structure of the present invention; Fig. 9 This is an enlarged view of the local structure of the present invention from another angle; Fig.10 It is a flow chart of the hydraulic system of the present invention.

[0020] In the figure: 1, housing, 101, first partition plate, 102, first cavity, 103, second cavity, 2, first rotating disk, 3, stirring disk, 301, dirt storage tank, 4, scraper box, 401, first guide plate, 104, first liquid inlet, 105, first liquid outlet, 106, second liquid outlet, 302, first inner tooth, 5, fan blade, 6, first driving member, 7, air injection pipe, 303, first bevel tooth, 8, first transmission wheel, 801, second bevel tooth, 802, worm gear, 9, first mounting rod, 10, transmission rod, 1001 , worm gear, 11, sliding block, 1011, first opening, 1012, first channel, 201, second opening, 402, box body, 403, first rotating plate, 404, second rotating plate, 12, first telescopic member, 13, scraper, 14, second rotating disk, 16, actuator, 17, shuttle valve, 18, reversing valve, 19, first three-way valve, 20, second three-way valve, 21, third three-way valve, 22, first check valve, 23, fourth three-way valve, 24, second check valve, 25, third check valve, 26, fifth three-way valve. DETAILED DESCRIPTION In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0021] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0022] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] Reference Figure 1 to Figure 10 , which is the first embodiment of the present invention, proposes a hydraulic filter, including a shell 1, the shell 1 has a first partition plate 101, the first partition plate 101 divides the interior of the shell 1 into a first cavity 102 and a second cavity 103; a first rotating disk 2 is rotatably set on the first partition plate 101, after the first rotating disk 2 rotates, the first cavity 102 and the second cavity 103 are connected or disconnected; a stirring disk 3 is rotatably set in the first cavity 102, located at the bottom of the first cavity 102, and the stirring disk 3 has a dirt storage groove 301; a scraper box 4 is vertically slidably set in the first cavity 102, after the scraper box 4 slides, the scraper box 4 is located in the first cavity 102 or the second cavity 103, and one end of the scraper box 4 has a first guide plate 401, and the first guide plate 401 is used to abut against the dirt storage groove 301.

[0025] In this embodiment, the first partition plate 101 is welded and installed inside the housing 1, dividing the housing 1 into a first cavity 102 and a second cavity 103. The first rotating disk 2 rotates on the lower surface of the first partition plate 101, and can control the communication state between the first cavity 102 and the second cavity 103. The stirring disk 3 is located at the bottom of the first cavity 102. The shape of the stirring disk 3 is optimized and can fully stir the hydraulic oil in the first cavity 102 to form a vortex when rotating. A dirt accumulation groove 301 is provided on the edge of the stirring disk 3. When the stirring disk 3 stirs the hydraulic oil, the centrifugal force is used to throw the impurities to the inner wall of the housing 1, and the impurities will fall into the dirt accumulation groove 301 after precipitation. The scraper box 4 is installed in the first cavity 102 by reliable vertical sliding. A first guide plate 401 is provided at one end of the scraper box 4, which is tightly matched with the dirt accumulation groove 301. When the stirring disk 3 rotates, the scraper box 4 can smoothly scrape the impurities in the dirt accumulation groove 301 into the scraper box 4. The scraper box 4 can slide vertically in the housing 1 to transport the collected impurities into the second cavity 103 .

[0026] The advantage is that the first rotating disk 2 can timely seal the impurities floating on the oil surface, thereby enhancing the filtering effect. The scraper box 4 cooperates with the first guide plate 401 to clean the dirt storage tank 301, and then transports the impurities to the second cavity 103 by vertical sliding, thereby achieving unified treatment of different types of impurities, avoiding the tediousness of separate treatment, improving work efficiency, making the filtering system easier to operate, reducing maintenance costs and operating difficulties, and improving the practicality and reliability of the hydraulic filter.

[0027] Furthermore, the shell 1 has a first liquid inlet 104, a first liquid outlet 105 and a second liquid outlet 106. The first liquid inlet 104 and the first liquid outlet 105 are both connected to the first cavity 102, and the second liquid outlet 106 is connected to the second cavity 103. The first liquid outlet 105 is located at the bottom of the shell 1 and coincides with the center of the shell 1.

[0028] In this embodiment, the first liquid inlet 104 is arranged on the side of the housing 1 to guide the hydraulic oil to flow smoothly into the first cavity 102. The first liquid outlet 105 is located at the center of the bottom of the housing 1 to ensure that the hydraulic oil can flow out at a suitable flow rate. The second liquid outlet 106 is arranged on the side of the housing 1 near the top and is connected to the second cavity 103.

[0029] The stirring disc 3 rotates at the bottom of the first cavity 102. When the stirring disc 3 rotates, it can drive the hydraulic oil in the first cavity 102 to form a vortex. Since the first liquid outlet 105 coincides with the center of the outer shell 1, under the action of the vortex, the hydraulic oil can flow quickly and concentratedly to the first liquid outlet 105. At the same time, the pressure at the center of the vortex is relatively high, which can effectively prevent impurities from entering the first liquid outlet 105, thereby ensuring the quality of the outflowing hydraulic oil. With the continuous injection of hydraulic oil, the hydraulic oil level will gradually rise to the second cavity 103. With the continuous stirring, impurities with a density less than that of the hydraulic oil will gradually float on the surface of the hydraulic oil. At this time, the first rotating disc 2 is rotated to seal the impurities floating on the hydraulic oil surface in the second cavity 103, and the second liquid outlet 106 can discharge the impurities in the second cavity 103.

[0030] Furthermore, the stirring disk 3 also has a first inner tooth 302, and also includes a plurality of blades 5, which are evenly spaced on the stirring disk 3 along the axis of the outer shell 1; the first driving member 6 is arranged on the outer wall of the outer shell 1, and the output end of the first driving member 6 is located in the first cavity 102 and meshes with the first inner tooth 302.

[0031] In this embodiment, the number of blades 5 on the stirring disc 3 is multiple. The blades 5 can generate strong vortexes during the stirring process. The first driving member 6 is installed on the outside of the housing 1 and is connected to the stirring disc 3 through a transmission shaft. A first inner tooth 302 is provided at a specific position of the stirring disc 3. The tooth shape of the first inner tooth 302 is precise and can be tightly meshed with the gear at the output end of the first driving member 6. The first inner tooth 302 has high strength and wear resistance and can withstand long-term meshing transmission. The advantage is that the number and distribution design of the fan blades 5 enable the hydraulic oil to form a vortex more quickly, thereby increasing the working efficiency of the equipment.

[0032] Furthermore, it also includes an air injection pipe 7 , one end of which is located in the first cavity 102 , and the other end of which extends out of the housing 1 .

[0033] In this embodiment, the gas injection pipe 7 is made of a corrosion-resistant and pressure-resistant high-strength material, and one end of the gas injection pipe 7 is installed in the first cavity 102 through a sealing connection device to ensure a tight connection and prevent gas leakage. The other end of the gas injection pipe 7 extends out of the housing 1 and is connected to an external gas source. A valve and a pressure regulating device are provided at the connection portion to accurately control the injection amount and injection pressure of the gas.

[0034] When the hydraulic filter is working, the valve on the air injection pipe 7 is opened, and the gas in the external air source is slowly injected into the hydraulic oil in the first cavity 102 through the air injection pipe 7. The gas is evenly dispersed in the hydraulic oil in the form of tiny bubbles, so that uniform oil bubbles are formed in the hydraulic oil. These oil bubbles continue to rise in the hydraulic oil, driving the impurities in the hydraulic oil that can float on the surface of the hydraulic oil to float up quickly. As the impurities continue to rise and reach the surface of the hydraulic oil, due to the flow of the hydraulic oil and the driving effect of the oil bubbles, the impurities enter the second cavity 103.

[0035] Furthermore, the stirring disc 3 also has a first bevel tooth 303, and also includes a first transmission wheel 8, which is rotatably and slidably arranged on the outer shell 1, and one end of the first transmission wheel 8 has a second bevel tooth 801. After the first transmission wheel 8 slides, the second bevel tooth 801 engages or disengages with the first bevel tooth 303, and the first transmission wheel 8 also has a worm gear tooth 802; the first mounting rod 9 is vertically arranged in the first cavity 102; the transmission rod 10 is rotatably sleeved on the first mounting rod 9, and the transmission rod 10 has a worm gear tooth 1001, which engages with the worm gear tooth 802, and the rotation of the first transmission wheel 8 drives the transmission rod 10 to rotate; the sliding block 11 is vertically slidably arranged in the first cavity 102, one end of the sliding block 11 is threadedly connected to the transmission rod 10, and the scraper box 4 is vertically slidably arranged at the other end of the sliding block 11.

[0036] In this embodiment, the first transmission wheel 8 is telescopically slidable and rotated on the housing 1. One end of the first transmission wheel 8 is designed with a second bevel gear 801, whose shape and size match the first bevel gear 303 on the stirring disk 3 so that it can be accurately meshed when needed. The first transmission wheel 8 is also provided with a worm gear 802. The first mounting rod 9 is vertically mounted in the first cavity 102 to ensure that it can stably support the rotation of the transmission rod 10. The worm gear 1001 on the transmission rod 10 is meshed with the worm gear 802 of the first transmission wheel 8, and efficient power transmission can be achieved. The rotation of the transmission rod 10 is driven by the rotation of the first transmission wheel 8. The sliding block 11 is vertically slidably arranged in the first cavity 102. One end of the sliding block 11 is provided with an internal thread, which is threadedly connected to the transmission rod 10. When the transmission rod 10 rotates, the sliding block 11 can slide vertically and stably in the first cavity 102. The scraping box 4 is vertically slidably arranged at the other end of the sliding block 11.

[0037] The advantage is that the sliding and telescopic setting of the first transmission wheel 8 can be engaged or disengaged with the stirring disk 3 at any time. The design of the second bevel teeth 801 and the worm gear teeth 802 enables the first transmission wheel 8 to transmit power to the stirring disk 3 and the transmission rod 10 at the same time, thereby improving the integration and efficiency of the system. The precise design of the first mounting rod 9 provides a stable support for the transmission rod 10, ensuring that the transmission rod 10 does not shake or deviate during rotation. The scraper box 4 is connected to the transmission rod 10 through the sliding block 11, thereby realizing precise vertical movement in the first cavity 102, which can effectively collect and clean impurities and improve the filtering effect and working efficiency of the filtration system.

[0038] Furthermore, the first partition plate 101 has a first opening 1011, and the first partition plate 101 also has a first channel 1012, the first channel 1012 coincides with the first opening 1011, the first rotating disk 2 has a second opening 201, and after the first rotating disk 2 rotates, the first opening 1011 coincides with the second opening 201, and the scraper box 4 includes a box body 402, one end of the box body 402 is slidably arranged on the end of the sliding block 11 away from the transmission rod 10, and the first guide plate 401 is located at the other end of the box body 402; the first rotating plate 403 is rotatably arranged on the end of the box body 402 close to the sliding block 11, and after the first rotating plate 403 rotates, it forms a plane or is perpendicular to the bottom of the box body 402; one end of the second rotating plate 404 is rotatably arranged on the end of the box body 402 away from the transmission rod 10 After the second rotating plate 404 rotates away from one end of the sliding block 11, the other end of the second rotating plate 404 is in contact with or not in contact with the bottom of the box body 402; the first torsion spring is arranged at the rotation connection between the first rotating plate 403 and the box body 402, and is used to provide a rotational force for the first rotating plate 403 and the bottom of the box body 402 to form a plane. The scraper box 4 passes through the first channel 1012 and is located in the second cavity 103, and after sliding to the uppermost end of the sliding block 11, the first rotating plate 403 is released from the abutment with the sliding block 11, and the first torsion spring drives the first rotating plate 403 and the box body 402 to form a plane; the second torsion spring is arranged at the rotation connection between the second rotating plate 404 and the box body 402, and is used to provide a rotational force for the other end of the second rotating plate 404 to abut against the bottom of the box body 402.

[0039] In this embodiment, a well-designed first opening 1011 and a first channel 1012 that coincides with the first opening 1011 are provided on the first partition plate 101. The first opening 1011 has a regular shape to ensure that the scraper box 4 can pass through smoothly. The inner wall of the first channel 1012 is smooth, providing a smooth path for the scraper box 4 to move between the two cavities. The second opening 201 on the first rotating disk 2 corresponds to the first opening 1011 of the first partition plate 101, and can be precisely coincident with the first opening 1011 when appropriate.

[0040] The dirt scraping box 4 is mainly composed of a box body 402, a first rotating plate 403, a second rotating plate 404, a first torsion spring and a second torsion spring. One end of the box body 402 is installed at the end of the sliding block 11 away from the transmission rod 10 through a reliable sliding connection device, so as to ensure that the box body 402 can slide stably with the sliding block 11. The first guide plate 401 is located at the other end of the box body 402, and its shape and size can fit the dirt storage tank 301 closely. The first rotating plate 403 is installed at one end of the box body 402 close to the sliding block 11 through a flexible rotating connection. When the dirt scraping box 4 is not at the uppermost end of the sliding block 11, the first rotating plate 403 abuts against the sliding block 11, so that the first rotating plate 403 and the box body 402 maintain a vertical state. When the dirt scraping box 4 slides to the second cavity 103 and is located at the uppermost end of the sliding block 11, the contact between the first rotating plate 403 and the sliding block 11 is released, and at this time, the first torsion spring plays a role, driving the first rotating plate 403 and the box body 402 to form a plane. A limit plate is provided at the rotation connection between the box body 402 and the second rotating plate 404, and the limit plate can effectively prevent the second rotating plate 404 from rotating toward the first guide plate 401, ensuring that the second rotating plate 404 can only rotate toward the inside of the box body 402. When the scraper box 4 is located in the dirt storage tank 301 and the stirring plate 3 rotates, the impurities in the dirt storage tank 301 will gradually enter the scraper box 4 through the first guide plate 401. During this process, the impurities can push the second rotating plate 404 to open it, allowing the impurities to smoothly enter the scraper box 4. When the scraper box 4 rises vertically, the second rotating plate 404 is in a vertical state with the box body 402 under the action of the second torsion spring, thereby effectively preventing the impurities in the scraper box 4 from leaking.

[0041] Furthermore, it also includes a first telescopic member 12, which is arranged in the second cavity 103; a scraper 13 is arranged at the extended end of the first telescopic member 12, and after the first telescopic member 12 is extended, the scraper 13 abuts against the bottom of the box body 402.

[0042] In this embodiment, a first telescopic member 12, such as a small hydraulic telescopic cylinder, is installed in the second cavity 103. A scraper 13 is installed at the extended end of the first telescopic member 12. The scraper 13 can be made of a rubber material with certain elasticity and wear resistance to ensure that when it contacts the bottom of the box body 402 of the scraper box 4, it can effectively scrape away dirt without causing excessive wear to the box body 402.

[0043] When the scraper box 4 passes through the passage of the first partition plate 101 into the second cavity 103 and slides to the uppermost position of the sliding block 11, the control system sends a signal to start the first telescopic member 12 to extend. At this time, the scraper 13 is in close contact with the bottom of the box body 402. With the continuous extension and retraction of the first telescopic member 12, the dirt accumulated at the bottom of the box body 402 can be further scraped off, ensuring that the scraper box 4 can remove the dirt to the greatest extent after completing a scraping operation, and prepare for the next filtering and scraping cycle.

[0044] The advantage is that by providing the first telescopic member 12 and the scraper 13, the dirt at the bottom of the scraper box 4 can be cleaned. The elastic material selection and reasonable installation method of the scraper 13 prevent the scraper box 4 from being damaged during the process of scraping the dirt, thereby improving the reliability and service life of the entire filter.

[0045] Furthermore, it also includes a second rotating disk 14 , which is rotatably disposed at the bottom of the first cavity 102 . After the second rotating disk 14 rotates, the first liquid outlet 105 is closed or opened.

[0046] In this embodiment, a second rotating disk 14 capable of rotating is added to the bottom of the first cavity 102. The diameter of the second rotating disk 14 is slightly larger than the diameter of the first liquid outlet 105, and the disk surface is parallel to the plane where the first liquid outlet 105 is located. The second rotating disk 14 can completely close the first liquid outlet 105 after rotating; when rotating to another angle, the second rotating disk 14 is completely offset from the first liquid outlet 105, thereby opening the first liquid outlet 105.

[0047] The advantage is that, through the rotation of the second rotating disk 14, the opening and closing of the first liquid outlet 105 can be flexibly controlled according to actual needs.

[0048] The filtering system uses a hydraulic filter and also includes a shuttle valve 17, which is connected to the first liquid inlet 104; the reversing valve 18 is connected to the first liquid outlet 105; the first three-way valve 19 is connected to the reversing valve 18; the second three-way valve 20 is connected to the reversing valve 18, and the first three-way valve 19 and the second three-way valve 20 are used to connect with the actuator; the third three-way valve 21 is connected to the shuttle valve 17; one end of the first check valve 22 is connected to the first three-way valve 19, and the other end is connected to the third three-way valve 21; the fourth three-way valve 23 is connected to the shuttle valve 17; one end of the second check valve 24 is connected to the second three-way valve 20, and the other end is connected to the fourth three-way valve 23; one end of the third check valve 25 is connected to the hydraulic filter, and the other end is connected to the reversing valve 18; one end of the fifth three-way valve 26 is connected to the fourth three-way valve 23, and the other end is connected to the reversing valve 18.

[0049] In this embodiment, first, a shuttle valve 17 is provided, one inlet of the shuttle valve 17 is connected to the main oil circuit of the hydraulic system, the other inlet is connected to the standby oil circuit or other auxiliary oil circuit, and the outlet of the shuttle valve 17 is connected to the first liquid inlet 104 of the hydraulic filter. In this way, a suitable oil circuit can be automatically selected according to different pressure conditions to deliver the hydraulic oil to be filtered to the filter.

[0050] The reversing valve 18 is arranged downstream of the filter and communicated with the first liquid outlet 105 of the hydraulic filter. The reversing valve 18 can change the flow direction of the hydraulic oil according to the control signal of the system to realize the switching of different working states.

[0051] The first three-way valve 19 and the second three-way valve 20 are respectively communicated with the reversing valve 18, and are used to be connected with the actuator 16. In actual work, according to the working requirements of the actuator 16, by controlling the states of the first three-way valve 19 and the second three-way valve 20, the filtered hydraulic oil is delivered to different parts of the actuator 16 to realize various actions of the actuator 16.

[0052] The third three-way valve 21 is connected to the shuttle valve 17, one end of the first check valve 22 is connected to the first three-way valve 19, and the other end is connected to the third three-way valve 21, forming a loop, which can achieve reverse flow or pressure balance of hydraulic oil under certain circumstances.

[0053] The fourth three-way valve 23 is also connected to the shuttle valve 17. One end of the second one-way valve 24 is connected to the second three-way valve 20, and the other end leads to the fourth three-way valve 23, which also plays a role in regulating the flow direction and pressure of the hydraulic oil.

[0054] One end of the third one-way valve 25 is connected to the hydraulic filter, and the other end is connected to the reversing valve 18, so as to ensure that the hydraulic oil can only flow from the filter to the reversing valve 18 in one direction to prevent backflow.

[0055] One end of the fifth three-way valve 26 is connected to the fourth three-way valve 23, and the other end is connected to the reversing valve 18, thereby improving the flexibility and reliability of the system.

[0056] When the hydraulic actuator 16 needs to move forward, the shuttle valve 17 selects the main oil circuit to deliver hydraulic oil to the hydraulic filter. After being filtered by the filter, the hydraulic oil enters the reversing valve 18 through the first liquid outlet 105, and then flows to the actuator 16 through the first three-way valve 19 according to the control signal, pushing the actuator 16 to complete the corresponding action. When the actuator 16 needs to move in the reverse direction or adjust the pressure, the reverse flow of the hydraulic oil or the pressure balance is achieved by controlling the states of each three-way valve and the one-way valve.

[0057] Filtration method, using a filtration system.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. Hydraulic filter, characterized in that: include: A housing (1), the housing (1) having a first partition plate (101), the first partition plate (101) dividing the interior of the housing (1) into a first cavity (102) and a second cavity (103); a first rotating disk (2), the first rotating disk (2) being rotatably disposed on the first partition plate (101), and after the first rotating disk (2) rotates, the first cavity (102) and the second cavity (103) are connected or disconnected; a stirring disc (3), the stirring disc (3) being rotatably disposed in the first cavity (102) and located at the bottom of the first cavity (102), the stirring disc (3) having a dirt collection groove (301); A dirt scraping box (4), the dirt scraping box (4) being vertically slidably arranged in the first cavity (102), the dirt scraping box (4) being located in the first cavity (102) or the second cavity (103) after the dirt scraping box (4) slides, the dirt scraping box (4) having a first guide plate (401) at one end, the first guide plate (401) being used to abut against the dirt storage groove (301).

2. The hydraulic filter according to claim 1, characterized in that: The housing (1) has a first liquid inlet (104), a first liquid outlet (105) and a second liquid outlet (106); the first liquid inlet (104) and the first liquid outlet (105) are both connected to the first cavity (102); the second liquid outlet (106) is connected to the second cavity (103); and the first liquid outlet (105) is located at the bottom of the housing (1) and coincides with the center of the housing (1).

3. The hydraulic filter according to claim 2, characterized in that: The stirring disc (3) further comprises a first inner tooth (302), and further comprises: Fan blades (5), the number of the fan blades (5) being multiple, and the fan blades (5) being evenly spaced and arranged on the stirring disk (3) along the axis of the housing (1); A first driving member (6), the first driving member (6) being arranged on the outer wall of the housing (1), the output end of the first driving member (6) being located in the first cavity (102) and meshing with the first inner tooth (302).

4. The hydraulic filter according to claim 3, characterized in that: Also includes: An air injection pipe (7), one end of the air injection pipe (7) being located in the first cavity (102) and the other end extending out of the housing (1).

5. The hydraulic filter according to claim 4, characterized in that: The stirring disc (3) further comprises a first cone tooth (303), and further comprises: a first transmission wheel (8), the first transmission wheel (8) being rotatably and slidably arranged on the housing (1), one end of the first transmission wheel (8) having second bevel teeth (801), after the first transmission wheel (8) slides, the second bevel teeth (801) are meshed with or disengaged from the first bevel teeth (303), and the first transmission wheel (8) further has worm gear teeth (802); a first mounting rod (9), the first mounting rod (9) being vertically arranged in the first cavity (102); a transmission rod (10), the transmission rod (10) being rotatably sleeved on the first mounting rod (9), the transmission rod (10) having worm teeth (1001), the worm teeth (1001) being meshed with the worm wheel teeth (802), and the first transmission wheel (8) rotating drives the transmission rod (10) to rotate; A sliding block (11), the sliding block (11) being vertically slidably disposed in the first cavity (102), one end of the sliding block (11) being threadedly connected to the transmission rod (10), and the scraper box (4) being vertically slidably disposed at the other end of the sliding block (11).

6. The hydraulic filter according to claim 5, characterized in that: The first partition plate (101) has a first opening (1011), the first partition plate (101) also has a first channel (1012), the first channel (1012) coincides with the first opening (1011), the first rotating disk (2) has a second opening (201), and after the first rotating disk (2) rotates, the first opening (1011) coincides with the second opening (201), and the scraping box (4) comprises: a box body (402), one end of the box body (402) being slidably disposed on an end of the sliding block (11) away from the transmission rod (10), and the first guide plate (401) being located at the other end of the box body (402); a first rotating plate (403), the first rotating plate (403) being rotatably arranged at one end of the box body (402) close to the sliding block (11), and the first rotating plate (403) and the bottom of the box body (402) forming a plane or being perpendicular to each other after rotation; a second rotating plate (404), one end of the second rotating plate (404) being rotatably arranged at an end of the box body (402) away from the sliding block (11), and after the second rotating plate (404) rotates, the other end of the second rotating plate (404) abuts against or does not abut against the bottom of the box body (402); a first torsion spring, the first torsion spring being arranged at a rotational connection between the first rotating plate (403) and the box body (402), and being used for providing a rotational force so that the first rotating plate (403) and the bottom of the box body (402) form a plane; after the scraper box (4) passes through the first passage and is located in the second cavity (103), and slides to the uppermost end of the sliding block (11), the first rotating plate (403) and the sliding block (11) are released from contact, and the first torsion spring drives the first rotating plate (403) and the box body (402) to form a plane; A second torsion spring, wherein the second torsion spring is arranged at the rotational connection between the second rotating plate (404) and the box body (402), and is used to provide a rotational force for the other end of the second rotating plate (404) to abut against the bottom of the box body (402).

7. The hydraulic filter according to claim 6, characterized in that: Also includes: a first telescopic member (12), wherein the first telescopic member (12) is arranged in the second cavity (103); A scraper (13), wherein the scraper (13) is arranged at the extended end of the first telescopic member (12); after the first telescopic member (12) is extended, the scraper (13) abuts against the bottom of the box body (402).

8. The hydraulic filter according to claim 7, characterized in that: Also includes: A second rotating disk (14), wherein the second rotating disk (14) is rotatably disposed at the bottom of the first cavity (102), and when the second rotating disk (14) rotates, the first liquid outlet (105) is closed or opened.

9. A filtering system for filtering hydraulic oil of a hydraulic actuator (16), using the hydraulic filter according to claim 8, characterized in that: include: a shuttle valve (17), the shuttle valve (17) being in communication with the first liquid inlet (104); a reversing valve (18), the reversing valve (18) being in communication with the first liquid outlet (105); a first three-way valve (19), the first three-way valve (19) being in communication with the reversing valve (18); a second three-way valve (20), the second three-way valve (20) being in communication with the reversing valve (18), and the first three-way valve (19) and the second three-way valve (20) being used to be connected to the actuator; a third three-way valve (21), the third three-way valve (21) being in communication with the shuttle valve (17); a first one-way valve (22), one end of the first one-way valve (22) being in communication with the first three-way valve (19), and the other end of the first one-way valve (22) being in communication with the third three-way valve (21); a fourth three-way valve (23), the fourth three-way valve (23) being in communication with the shuttle valve (17); a second one-way valve (24), one end of the second one-way valve (24) being in communication with the second three-way valve (20), and the other end of the second one-way valve (24) being in communication with the fourth three-way valve (23); a third one-way valve (25), one end of the third one-way valve (25) being in communication with the hydraulic filter, and the other end of the third one-way valve (25) being in communication with the reversing valve (18); A fifth three-way valve (26), one end of the fifth three-way valve (26) being in communication with the fourth three-way valve (23), and the other end of the fifth three-way valve (26) being in communication with the reversing valve (18).

10. A filtration method using the filtration system according to claim 9.

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