An impact-resistant hydraulic valve structure

Abstract

The application belongs to the technical field of hydraulic valve group devices, and particularly relates to an impact-resistant hydraulic valve structure which comprises a direction control valve, a pressure control valve, a flow control valve, an integrated carrier, an oil suction filter and auxiliary accessories; the oil suction filter comprises a shell which is installed on the integrated carrier, an outer filter element is arranged in the shell, and an oil suction port and an oil outlet port are arranged at the bottom of the shell; the oil in the inner filter element is extruded by the rising cleaning plate, the oil passes through the inner filter element and the outer filter element and enters the outer side of the outer filter element, the volume of the pressure bag is synchronously reduced by the pressure pump, so that the oil can smoothly flow in the reverse direction, the purpose of reverse flushing is achieved by the mode that the oil flows in the reverse direction and passes through the inner filter element and the outer filter element, the impurities intercepted on the surface of the inner filter element and the outer filter element are flushed into the outer side of the outer filter element by the oil, the impurities are separated and suspended in the oil, the cleanliness of the filter element is improved, the filtering capacity of the filter element is maintained, and the operation stability of the hydraulic valve is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of hydraulic valve assembly devices, specifically an impact-resistant hydraulic valve structure. Background Technology

[0002] A hydraulic valve assembly is a modular unit that integrates multiple functions of hydraulic valves, such as pressure valves, flow valves, directional valves, and auxiliary components such as connectors and sensors, onto a unified valve body or valve block. Its core function is to centrally control the pressure, flow rate, and oil direction of the hydraulic system, simplify pipeline connections, and improve system reliability and maintenance convenience. The composition of a hydraulic valve assembly can be divided into three main categories: core functional components, integration carrier, and auxiliary accessories. Different types of valve assemblies, such as pressure control valve assemblies, directional control valve assemblies, and multi-functional valve assemblies, may differ in their component combinations, but their basic structural framework remains the same.

[0003] In the actual use of hydraulic valves, the cleanliness of the internal oil directly determines the control accuracy, service life, and system reliability of the valve assembly. The core objective of filtration is to remove impurities from the oil, such as metal shavings, rubber particles, and sludge, to prevent damage to the precision components within the valve assembly. The suction filter is the first stage of filtration in the hydraulic valve assembly, installed at the suction port to filter the oil drawn in from the tank, protecting the subsequent valve assembly from damage by large particles. However, in the initial stages of operation, the water hammer effect or sudden pressure change at the moment the hydraulic pump starts can cause a momentary impact on the filter element, leading to filter element damage. This reduces the filter element's filtration efficiency, damages subsequent valves, and affects the use of the hydraulic valve assembly. Furthermore, after prolonged use, the filter element becomes increasingly clogged. Frequent cleaning may introduce air bubbles into the oil during cleaning and replacement, affecting the use of the hydraulic valve assembly. Delayed cleaning may cause a surge in filter element pressure, resulting in filter element damage. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies and solve the aforementioned technical problems, this invention proposes an impact-resistant hydraulic valve structure.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: This invention proposes an anti-impact hydraulic valve structure, including a directional control valve, a pressure control valve, a flow control valve, an integrated carrier, a suction filter, and auxiliary accessories; the suction filter includes:

[0006] The housing is mounted on an integrated carrier. An external filter element is installed inside the housing. An oil suction port and an oil outlet are respectively provided at the bottom of the housing. One end of the oil suction port is located outside the external filter element and is connected to the oil supply tank of the hydraulic valve. The oil outlet is located inside the external filter element and is connected to the internal pipeline of the hydraulic valve. A top cover is provided on the top cover. A replacement groove is provided on the top cover. A filter frame is slidably connected in the replacement groove. An internal filter element is installed in the filter frame and is located inside the external filter element.

[0007] A lifting rod is slidably connected to the outside of the outer filter element. The lifting rod is connected to an electric actuator mounted on the outer casing, and one end of the lifting rod has a lifting ring that communicates with the inside of the lifting rod. An electromagnet is installed inside the lifting ring. A cleaning plate is slidably connected to the inside of the inner filter element, and the cleaning plate contacts the inside of the inner filter element. A magnetic assembly is installed in the cleaning plate and attracts the energized electromagnet. A filter bag is installed on the lifting ring, and the opening of the filter bag faces the outer filter element. A pressure bladder is installed inside the outer casing, and the pressure bladder is connected to a pressure pump that communicates with the outside.

[0008] Preferably, the lifting ring is provided with a lifting frame, and the lifting frame is located at the top of the filter bag. The opening of the filter bag is located on the lifting frame. Swing plates are evenly provided on the lifting frame, and the swing plates are hinged by torsion springs. A squeezing plate is slidably connected to the center of the cleaning plate by a spring, and a connecting membrane is provided between the squeezing plate and the cleaning plate. A pressure sensor is provided between the squeezing plate and the cleaning plate. One-way air nozzles are evenly provided on the cleaning plate.

[0009] Preferably, a slider is slidably connected to the lifting ring via a spring, and the slider is arc-shaped. The outer surface of the outer filter element is uniformly provided with protrusions, and the slider contacts the protrusions.

[0010] Preferably, the inner side of the slider is provided with a cleaning brush, and the cleaning brush is tilted towards the mesh on the outer filter element.

[0011] Preferably, the outer casing is provided with a comb ring near the middle position, and the comb ring is located outside the outer filter element, and the comb ring is inserted into the cleaning brush.

[0012] Preferably, the inner wall of the outer shell is provided with a groove, and a sealing plate is slidably connected in the groove by a spring. The sealing plates are distributed in a ring, are fan-shaped and have a sloping top, and are provided with sealing strips around the sealing plates. The sealing plates contact the bottom of the lifting ring.

[0013] Preferably, a partition is provided above the sealing plate, the partition is slidably connected to the outer shell by a spring, and the lifting rod passes through the partition.

[0014] Preferably, a rotating ring is rotatably connected to the top of the lifting ring, and a blade is provided on the top of the rotating ring; a telescopic tube is sleeved on the lifting rod, and the telescopic tube is rotatably connected to the lifting ring, with one end of the telescopic tube connected to a motor installed on the outer casing.

[0015] Preferably, the lifting ring is provided with rubber scrapers on its outer periphery.

[0016] Preferably, a telescopic rod is provided between the cleaning plate and the top cover, with one end of the telescopic rod fixed to the bottom of the top cover and the other end fixed to the top of the cleaning plate, and a liquid level sensor is provided on the telescopic rod.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The anti-impact hydraulic valve structure of the present invention involves a cleaning plate rising and squeezing the oil in the inner filter element. The oil passes through the inner and outer filter elements and enters the outer side of the outer filter element. The pressure pump controls the volume of the pressure bladder to shrink synchronously, allowing the oil to flow smoothly in the reverse direction. By flowing the oil in the reverse direction through the inner and outer filter elements, the purpose of backwashing is achieved. The oil flushes the impurities intercepted on the surfaces of the inner and outer filter elements into the outer side of the outer filter element, separating and suspending the impurities in the oil, thereby improving the cleanliness of the filter element, maintaining the filtration capacity of the filter element, reducing the impurities contained in the oil in the hydraulic valve assembly, and improving the operational stability of the hydraulic valve.

[0019] 2. The anti-impact hydraulic valve structure of the present invention allows for reverse flow of the oil while the lifting ring drives the filter bag to rise. The space outside the outer filter element is covered by the lifting ring and the filter bag. As the lifting ring rises and squeezes the oil, it scrapes off the filtered impurities and mixes them into the oil. The oil passes through the filter bag and moves from the upper layer to the lower layer. Impurities in the oil after backwashing are collected by pressure filtration, reducing the impurities in the oil and thus improving the cleanliness of the oil, thereby improving the operational stability of the hydraulic valve assembly. When the filter bag rises, the oil is continuously squeezed by the cleaning plate, causing the oil to continuously flow in reverse, preventing the oil from flowing back from the outer filter element above the lifting ring. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 It is a cross-sectional view of the three-dimensional shell;

[0023] Figure 3 This is a schematic diagram showing how the lifting ring drives the cleaning plate to rise and fall.

[0024] Figure 4 yes Figure 3 A schematic diagram of the comb-tooth ring at point A of the brush for cleaning;

[0025] Figure 5 yes Figure 3 A schematic diagram showing the contact between the slider and the protrusion at point A.

[0026] Figure 6yes Figure 2 A top view with the bottom surface of the sealing plate as the reference.

[0027] Figure 7 yes Figure 2 A top view with the top surface of the sealing plate as the reference.

[0028] In the diagram: Integrated carrier 1, outer shell 11, outer filter element 12, top cover 13, replacement slot 14, filter frame 15, inner filter element 16, lifting rod 17, electric push rod 18, lifting ring 19, electromagnet 2, cleaning plate 21, magnet assembly 22, filter bag 23, pressure bladder 24, lifting frame 25, swing plate 26, squeezing plate 27, connecting membrane 28, pressure sensor 29, one-way air nozzle 3, slider 31, protrusion 32, cleaning brush 33, comb ring 34, groove 35, sealing plate 36, partition 37, rotating ring 38, blade 39, telescopic tube 4, motor 41, rubber scraper 42, telescopic rod 43. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1:

[0031] To effectively solve the above problems, see the attached diagram in the instruction manual. Figures 1-7 As shown, an anti-impact hydraulic valve structure includes a directional control valve, a pressure control valve, a flow control valve, an integrated carrier 1, a suction filter, and auxiliary accessories; the suction filter includes:

[0032] The housing 11 is mounted on the integrated carrier 1. An outer filter element 12 is provided inside the housing 11. An oil suction port and an oil outlet are respectively provided at the bottom of the housing 11. One end of the oil suction port is located outside the outer filter element 12 and is connected to the oil supply tank of the hydraulic valve. The oil outlet is located inside the outer filter element 12 and is connected to the internal pipeline of the hydraulic valve. A top cover 13 is provided on the top cover 13. A replacement groove 14 is provided on the top cover 13. A filter frame 15 is slidably connected in the replacement groove 14. An inner filter element 16 is installed in the filter frame 15. The inner filter element 16 is located inside the outer filter element 12.

[0033] A lifting rod 17 is slidably connected to the outside of the outer filter element 12. The lifting rod 17 is connected to an electric push rod 18 installed on the outer shell 11. One end of the lifting rod 17 is provided with a lifting ring 19, which is in communication with the inside of the lifting rod 17. An electromagnet 2 is provided inside the lifting ring 19. A cleaning plate 21 is slidably connected to the inside of the inner filter element 16, and the cleaning plate 21 is in contact with the inside of the inner filter element 16. A magnet assembly 22 is provided in the cleaning plate 21 and attracts the energized electromagnet 2. A filter bag 23 is provided on the lifting ring 19, and the opening of the filter bag 23 faces the outer filter element 12. A pressure bladder 24 is provided inside the outer shell 11, and the pressure bladder 24 is connected to a pressure pump connected to the outside.

[0034] The integrated carrier 1 is a base conventionally used for installing valves, pipelines, and sensors. The oil inlet of the hydraulic valve assembly is connected to the oil outlet of the suction filter, and the oil suction port of the suction filter is connected to the oil supply tank. The outer filter element 12 is a conventional non-metallic hard filter element that meets both forward and reverse flow requirements, and the inner filter element 16 is a conventional cloth filter element that meets both forward and reverse flow requirements. The electromagnet 2 and the magnet assembly 22 are a conventional adsorption combination. When the electromagnet 2 is energized, it passes through the outer filter element 12 and the inner filter element 16 to attract the magnet assembly 22. The lifting ring 19 achieves synchronous movement through the adsorption effect of the electromagnet 2 and the magnet assembly 22. The filter bag 23... The pressure bladder 24 is a conventional component used for filtering impurities in oil. It is a conventional component for controlling the volume of liquid within a sealed container. For example, when oil in the inner filter element 16 is squeezed into the space between the outer filter element 12 and the outer casing 11, the pressure pump controls the pressure bladder 24 to shrink in volume by pumping water, thus increasing the space outside the outer filter element 12, enough to squeeze the oil in the inner filter element 16 in. When the oil outside the outer filter element 12 returns to the inside of the inner filter element 16, the pressure pump controls the pressure bladder 24 to return to its original volume, restoring the internal working space of the oil suction filter. When the electromagnet 2 is energized, it will not affect the normal operation of other components.

[0035] Specific workflow: After the hydraulic valve group is started, the suction filter draws oil from the oil supply tank into the outer side of the outer filter element 12. After the oil passes through the outer filter element 12 to filter out large particles of impurities, the oil then passes through the inner filter element 16 to filter out small particles of impurities. The multi-layer filter elements with different particle sizes improve the oil filtration efficiency through graded interception. In addition, multi-layer filtration can also share the dirt holding capacity and extend the service life of the filter elements. Moreover, the effect of multi-layer filtration can reduce the impact of water hammer effect generated when the oil just starts to flow, and avoid the filter elements being damaged by impact. The synergistic effect of these three effects can provide more comprehensive and stable pre-protection for the hydraulic valve group compared with traditional single-layer filter elements. By optimizing the suction filtration effect, it reduces valve group failures such as jamming, wear, and decreased accuracy caused by impurities, extends the mean time between failures of the valve group, and improves the reliability of the entire hydraulic system.

[0036] The outer filter element 12 is mostly a rigid filter element, which can be cleaned without damage. The inner filter element 16 is a cloth filter element, which is more difficult to clean and needs to be replaced. Therefore, during long-term use, the electromagnet 2 is energized to attract the magnet assembly 22, causing the lifting ring 19 and the cleaning plate 21 to move synchronously. At this time, the oil suction filter is in a static state, and the oil inside and outside the outer filter element 12 is also in a stagnant state. The electric push rod 18 drives the lifting ring 19 to rise along the outside of the outer filter element 12 through the lifting rod 17. The cleaning plate 21 rises and squeezes the oil in the inner filter element 16. The oil passes through The inner filter element 16 and the outer filter element 12 enter the outer side of the outer filter element 12. The pressure pump controls the volume of the pressure bladder 24 to shrink synchronously, so that the oil can flow smoothly in the reverse direction. By the reverse flow of the oil through the inner filter element 16 and the outer filter element 12, the purpose of backwashing is achieved. The oil flushes the impurities intercepted on the surface of the inner filter element 16 and the outer filter element 12 into the outer side of the outer filter element 12, separates the impurities and suspends them in the oil, thereby improving the cleanliness of the filter element, maintaining the filtration capacity of the filter element, reducing the impurities contained in the oil in the hydraulic valve group, and improving the operational stability of the hydraulic valve.

[0037] Furthermore, as the oil flows in reverse, the lifting ring 19 drives the filter bag 23 to rise. The space outside the outer filter element 12 is covered by the lifting ring 19 and the filter bag 23. As the lifting ring 19 rises and squeezes the oil, it scrapes off the filtered impurities and mixes them into the oil. The oil passes through the filter bag 23 and moves from the upper layer to the lower layer. Impurities in the oil after backwashing are collected by pressure filtration, reducing the impurities in the oil and thus improving the cleanliness of the oil, thereby improving the operational stability of the hydraulic valve group. When the filter bag 23 rises, the oil is continuously squeezed by the cleaning plate 21, causing the oil to flow in reverse continuously, and there will be no backflow of oil from the outer filter element 12 above the lifting ring 19.

[0038] When the inner filter element 16 is replaced, the filter frame 15 containing the inner filter element 16 is loosened and fixed directly through the replacement slot 14 of the top cover 13, and then slid out of the replacement slot 14. After replacing the new inner filter element 16, the filter frame 15 is slid back in to reset and seal, without disassembling the entire filter, thus improving the convenience of replacement. In addition, since the inner filter element 16 is replaced frequently, the replacement opening is narrowed to reduce the degree of exposure between the inside of the housing 11 and the outside, thereby reducing the degree of air entering or affecting the system and improving the operational stability of the hydraulic valve assembly. When the outer filter element 12 is replaced, the outer filter element 12 can be removed and taken out from the housing 11 after opening the top cover 13 for replacement, further improving the convenience of replacement.

[0039] In addition, when filter blockage or system flow fluctuations cause increased oil suction resistance, pressure bladder 24 activates its pressure compensation function. For example, pressure bladder 24, connected to an external pressure pump, can sense pressure changes within housing 11, thereby monitoring oil flow pressure. If the negative pressure within housing 11 is too high, posing a risk of cavitation, the pressure pump inflates pressure bladder 24, causing it to expand and compress the space within housing 11, indirectly balancing the oil suction pressure. Alternatively, the contraction or expansion of pressure bladder 24 can regulate oil flow velocity, preventing the hydraulic pump from cavitating due to excessive suction resistance. This achieves pressure compensation for oil flow, reducing hydraulic slamming caused by sudden changes in oil flow rate. Hydraulic slamming impacts the valve core and body of the valve assembly, potentially leading to loosening of the valve assembly structure and seal failure over time, thus further improving the operational stability of the hydraulic valve assembly.

[0040] When the oil flows in reverse, the filter frame 15 is set so that the oil can be supported and fixed when it flows. When the oil passes through, the inner filter element 16 can remain fixed and maintain a set gap with the outer filter element 12. This helps impurities on the inner filter element 16 to pass through the mesh in the outer filter element 12, thus improving the impurity removal efficiency.

[0041] Example 2:

[0042] Based on Embodiment 1, the lifting ring 19 is provided with a lifting frame 25, and the lifting frame 25 is located at the top of the filter bag 23. The opening of the filter bag 23 is located on the lifting frame 25. The lifting frame 25 is uniformly provided with swing plates 26, and the swing plates 26 are hinged by torsion springs. The center of the cleaning plate 21 is slidably connected to a squeezing plate 27 by a spring, and a connecting membrane 28 is provided between the squeezing plate 27 and the cleaning plate 21. A pressure sensor 29 is provided between the squeezing plate 27 and the cleaning plate 21. One-way air nozzles 3 are uniformly provided on the cleaning plate 21. The one-way air nozzles 3 are conventional valves used to realize one-way flow of liquid, so that when the cleaning plate 21 descends, the oil can pass through the one-way air nozzles 3 through the cleaning plate 21.

[0043] The lifting ring 19 is slidably connected to a slider 31 by a spring, and the slider 31 is arc-shaped. The outer surface of the outer filter element 12 is uniformly provided with protrusions 32, and the slider 31 contacts the protrusions 32.

[0044] The slider 31 is provided with a cleaning brush 33 on its inner side, and the cleaning brush 33 is tilted towards the mesh on the outer filter element 12.

[0045] The outer casing 11 is provided with a comb ring 34 near the middle position, and the comb ring 34 is located outside the outer filter element 12. The comb ring 34 is inserted into the cleaning brush 33.

[0046] Specific workflow: The lifting ring 19 is stationary on the top of the outer casing 11. When the lifting ring 19 drives the cleaning plate 21 to descend synchronously, the swing plate 26 is set to rotate in one direction, so that when the lifting frame 25 descends, the swing plate 26 is limited and fixed. The lifting ring 19 pressurizes the oil on the outside of the outer filter element 12 into the middle of the inner filter element 16. When the cleaning plate 21 descends, it is affected by the one-way air nozzle 3. The oil passes through the one-way air nozzle 3, passes through the cleaning plate 21, and passes through the inner filter element 16 and the outer filter element 12 in sequence. This causes the inner filter element 16 and the outer filter element 12 to be pre-compressed in advance, avoiding damage to the inner filter element 16 by the sudden compressive force, thereby improving the stability of the inner filter element 16. When the lifting ring 19 and the cleaning plate 21 rise, the oil in the inner filter element 16 can no longer pass through the one-way air nozzle 3 and be squeezed by the cleaning plate 21. This causes the oil to flow in reverse when the cleaning plate 21 rises or falls, prolonging the oil backwashing time, improving the cleaning effect of the filter element, and thus improving the operational stability of the hydraulic valve group.

[0047] When the lifting ring 19 rises, the swing plate 26 is affected by the unidirectional rotation and the oil pressure. The swing plate 26 is squeezed and swings to open the filter bag 23. When the lifting ring 19 rises, the filter bag 23 opens, and the oil flows from top to bottom through the filter bag 23 and into the impurity filter bag 23. When it falls, the filter bag 23 closes, and the oil will not backflow to flush the filter bag 23. This allows the impurities collected in the filter bag 23 to be stored inside, preventing the impurities from scattering, improving the cleanliness of the oil, and thus improving the operational stability of the hydraulic valve group.

[0048] When the cleaning plate 21 descends, the extrusion plate 27 descends synchronously with it. When the cleaning plate 21 rises, the oil extrudes the extrusion plate 27, pressing it into the cleaning plate 21. The connecting membrane 28 between the extrusion plate 27 and the cleaning plate 21 is stretched. The force generated when the extrusion plate 27 is pressed against the cleaning plate 21 is detected by a conventional pressure sensor 29. The pressure sensor 29 sends and displays the pressure value to the personnel, enabling them to monitor the pressure of the oil extrusion backwash and avoid excessive backwash pressure that could damage the inner filter element 16. This improves the oil backwash cleaning effect, shortens the cleaning time, and enhances practicality.

[0049] Furthermore, the connecting membrane 28 does not generate a pulling force between the extrusion plate 27 and the cleaning plate 21, thus avoiding any impact on the detection results. Moreover, the connecting membrane 28 can block the oil from the pressure sensor 29, preventing interference from the oil. Additionally, when the extrusion plate 27 is pressed into the cleaning plate 21, the space between them shrinks. This shrinkage forces air into the space surrounding the connecting membrane 28. The elongation or contraction of the connecting membrane 28 satisfies the gas flow effect generated by the mutual movement of the extrusion plate 27 and the cleaning plate 21, preventing the air between them from scattering and causing the extrusion plate 27 to be blocked by air pressure, which could affect the detection of the pressure sensor 29. This further improves the oil backflushing cleaning effect, thereby enhancing the operational stability of the hydraulic valve assembly.

[0050] When the lifting ring 19 rises and falls, it drives the slider 31 to rise and fall past the protrusion 32. When the slider 31 contacts the protrusion 32, it is squeezed into the lifting ring 19. When the slider 31 passes the protrusion 32, it is affected by the spring and moves quickly to reset. When the slider 31 resets, it collides with the outer filter element 12, causing the outer filter element 12 to vibrate, thereby loosening the adhesion between the outer filter element 12 and the impurities. Combined with the backwashing effect of the oil, it improves the impurity removal efficiency and speeds up the impurity collection efficiency. Furthermore, since the slider 31 is arc-shaped and multiple sliders 31 surround the outer filter element 12, the slider 31 can tap the surface of the outer filter element 12 evenly along the path from bottom to top, further improving the impurity removal efficiency.

[0051] Furthermore, the cleaning brush 33 on the inner side of the slider 31 contacts the outer filter element 12 as the slider 31 moves back and forth. Since the cleaning brush 33 is tilted towards the mesh of the outer filter element 12, the tilted bristles penetrate deep into the mesh of the outer filter element 12 multiple times, brushing out the impurities stuck in the mesh, reducing the blockage on the outer filter element 12, avoiding the situation where the mesh blockage leads to the failure of coarse filtration, maintaining the filtration capacity of the outer filter element 12, thereby improving the operational stability of the hydraulic valve group. In addition, the comb ring 34 at the bottom of the housing 11 is fixed outside the outer filter element 12. When the cleaning brush 33 moves up and down with the lifting frame 25, the comb ring 34 inserts into the gap between the bristles of the cleaning brush 33 to clean the impurities on the bristles. The cleaned impurities are suspended in the oil and are collected and removed by the filter bag 23 when the lifting ring 19 rises. During the reciprocating movement of the slider 31, some oil passes through, but this does not affect the remaining oil being pressed into the middle of the inner filter element 16.

[0052] Example 3:

[0053] Based on Embodiment 2, the inner wall of the outer shell 11 is provided with a groove 35, and a sealing plate 36 is slidably connected in the groove 35 by a spring. The sealing plate 36 is distributed in a ring, is fan-shaped and has a sloping top. A sealing strip is provided around the sealing plate 36, and the sealing plate 36 contacts the bottom of the lifting ring 19.

[0054] A partition 37 is provided above the sealing plate 36. The partition 37 is slidably connected to the outer casing 11 by a spring. The lifting rod 17 passes through the partition 37.

[0055] The top of the lifting ring 19 is rotatably connected to a rotating ring 38, and the top of the rotating ring 38 is provided with a blade 39; a telescopic tube 4 is sleeved on the lifting rod 17, and the telescopic tube 4 is rotatably connected to the lifting ring 19. One end of the telescopic tube 4 is connected to a motor 41 installed on the outer casing 11; the telescopic tube 4 is installed on one of the multiple lifting rods 17, and the telescopic tube 4 is a conventional tool with telescopic function. For example, a second tube is sleeved inside a first tube, and a third tube is sleeved inside a second tube. The first tube, the second tube, and the third tube can only slide relative to each other and cannot rotate, so that when the motor 41 drives the telescopic tube 4 to rotate through the transmission belt, the telescopic tube 4 can drive the rotating ring 38 to rotate.

[0056] The lifting ring 19 is provided with a rubber scraper 42 on its outer periphery;

[0057] Specific workflow: Before cleaning, the lifting ring 19 descends, pressing the top slope of the sealing plate 36 and squeezing the sealing plate 36 into the groove 35. After the lifting ring 19 passes the sealing plate 36, the sealing plate 36 extends out and abuts against the surface of the lifting rod 17 under the influence of the spring. After cleaning, the lifting ring 19 rises and pushes open the sealing plate 36. After the lifting ring 19 passes the sealing plate 36, the sealing plate 36 scrapes over the filter bag 23 at the bottom of the lifting ring 19, squeezing out excess oil from the filter bag 23 to prevent the filter bag 23 from carrying too much oil, which would reduce the amount of oil in the hydraulic valve and cause an impact. After the lifting ring 19 passes the sealing plate 36, the sealing plates 36 reset and contact each other through the sealing strip to achieve a sealing effect, sealing the outside of the outer filter element 12 and preventing it from affecting the operation of the hydraulic valve assembly.

[0058] As the lifting rod 17 lowers the lifting ring 19, the partition 37 also lowers until it touches the top of the sealing plate 36. The partition 37 seals the opening sealing plate 36, preventing insufficient sealing when the lifting plate rises and squeezes the oil on the outside of the outer filter element 12, thus improving the filtration efficiency of the oil.

[0059] Furthermore, when the lifting ring 19 rises and falls, the motor 41 drives the telescopic tube 4 to rotate, the telescopic tube 4 drives the rotating ring 38 to rotate, the rotating ring 38 drives the blades 39 to rotate, and the blades 39 drive the oil to rotate. The rotation of the oil generates centrifugal force, which throws impurities toward the inner wall of the outer shell 11. This allows the impurities to be moved away from the filter element by centrifugal force as soon as they are flushed away, preventing them from re-contacting the filter element, thereby improving the filtration efficiency of impurities and thus improving the operational stability of the hydraulic valve group. In addition, during the rotation of the oil, the motor 41 can control the blades 39 to stop rotating. The oil is guided by the inclined blades 39 and flows toward the surface of the outer filter element 12, which plays a flushing role on the surface of the outer filter element 12, increasing the cleanliness of the outer filter element 12 and thus maintaining the filtration capacity of the outer filter element 12.

[0060] During the lifting process, the lifting ring 19 drives the rubber scraper 42 to scrape the inner wall of the housing 11, removing impurities that are close to it due to centrifugal force, thus preventing them from adhering to the inner wall of the housing 11 and contaminating the filtered oil. In addition, the rubber scraper 42 can also reduce the friction between the lifting ring 19 and the sealing plate 36, preventing friction debris from being generated by rigid contact and contaminating the oil.

[0061] Example 4:

[0062] Based on Embodiment 3, a telescopic rod 43 is provided between the cleaning plate 21 and the top cover 13, and one end of the telescopic rod 43 is fixed to the bottom of the top cover 13 and the other end is fixed to the top of the cleaning plate 21. A liquid level sensor is provided on the telescopic rod 43. The telescopic rod 43 is a conventional telescopic tool, and conventional liquid level sensors are distributed on the telescopic rod 43.

[0063] Specific workflow: During the lifting and lowering of the cleaning plate 21, the telescopic rod 43 between the top of the cleaning plate 21 and the bottom of the top cover 13, such as a multi-stage sleeve telescopic rod 43, plays an axial guiding and stabilizing support role as the cleaning plate 21 moves up and down with the lifting ring 19. This prevents the cleaning plate 21 from radially shifting due to the attraction of the electromagnet 2 or the impact of the oil, ensuring that the edge of the cleaning plate 21 is always in close contact with the inner side of the inner filter element 16, thus guaranteeing the pressure filtration effect. Furthermore, the liquid level sensor integrated on the telescopic rod 43 synchronously monitors the oil level height inside the filter housing 11 as the telescopic rod 43 extends and retracts, and transmits the liquid level signal to the system controller in real time to monitor the oil volume, preventing insufficient oil volume from affecting the operation of the hydraulic valve group. Moreover, the electromagnet 2 can also adsorb metallic impurities in the oil, preventing the inner filter element 16 from being scratched when the oil flows.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shock-resistant hydraulic valve structure comprising a directional control valve, a pressure control valve, a flow control valve, an integrated carrier (1), an oil suction filter, and auxiliary fittings; characterized in that, The oil absorption filter comprises: An outer shell (11) is mounted on an integrated carrier (1), an outer filter element (12) is arranged in the outer shell (11), an oil suction port and an oil outlet port are arranged at the bottom of the outer shell (11), one end of the oil suction port is located outside the outer filter element (12) and is communicated with an oil supply tank of a hydraulic valve, the oil outlet port is located inside the outer filter element (12) and is communicated with an inner pipeline of the hydraulic valve, a top cover (13) is arranged at the top of the outer shell (11), a replacement groove (14) is arranged on the top cover (13), a filter frame (15) is slidably connected in the replacement groove (14), an inner filter element (16) is arranged in the filter frame (15), and the inner filter element (16) is located inside the outer filter element (12); A lifting rod (17) is slidably connected outside the outer filter element (12), the lifting rod (17) is connected with an electric push rod (18) arranged on the outer shell (11), one end of the lifting rod (17) is provided with a lifting ring (19), the lifting ring (19) is communicated with the inside of the lifting rod (17), an electromagnet (2) is arranged in the lifting ring (19), a cleaning plate (21) is slidably connected inside the inner filter element (16), the cleaning plate (21) is in contact with the inner side of the inner filter element (16), a magnet assembly (22) is arranged in the cleaning plate (21) and is attracted by the electrified electromagnet (2), a filter cloth bag (23) is arranged on the lifting ring (19), and the opening of the filter cloth bag (23) faces the outside of the outer filter element (12); a pressure capsule (24) is arranged in the outer shell (11), and the pressure capsule (24) is communicated with a pressure pump communicated with the outside; A lifting frame (25) is arranged on the lifting ring (19), the lifting frame (25) is located at the top of the filter cloth bag (23), the opening of the filter cloth bag (23) is located on the lifting frame (25), swing plates (26) are uniformly arranged on the lifting frame (25), the swing plates (26) are located on the opening of the filter cloth bag (23), and the swing plates (26) are hingedly arranged through torsional springs; one-way air nozzles (3) are uniformly arranged on the cleaning plate (21); A sliding block (31) is slidably connected in the lifting ring (19) through a spring, the sliding block (31) is arc-shaped, and protrusions (32) are uniformly arranged on the outer surface of the outer filter element (12), and the sliding block (31) is in contact with the protrusions (32).

2. The impact-resistant hydraulic valve structure of claim 1, wherein: A pressing plate (27) is slidably connected in the center of the cleaning plate (21) through a spring, a connecting film (28) is arranged between the pressing plate (27) and the cleaning plate (21), and a pressure sensor (29) is arranged between the pressing plate (27) and the cleaning plate (21).

3. The impact-resistant hydraulic valve structure of claim 1, wherein: A cleaning brush (33) is arranged on the inner side of the sliding block (31), and the cleaning brush (33) is inclined towards the mesh on the outer filter element (12).

4. The impact-resistant hydraulic valve structure of claim 3, wherein: A comb tooth ring (34) is arranged near the middle position of the outer shell (11), the comb tooth ring (34) is located outside the outer filter element (12), and the comb tooth ring (34) is inserted into the cleaning brush (33).

5. The impact-resistant hydraulic valve structure of claim 1, wherein: The outer shell (11) is provided with a groove (35) on the inner wall, a sealing plate (36) is slidably connected in the groove (35) by a spring, the sealing plate (36) is annularly distributed, the sealing plate (36) is fan-shaped and the top is beveled, the sealing plate (36) is provided with a sealing strip around, and the sealing plate (36) contacts the bottom of the lifting ring (19).

6. A shock resistant hydraulic valve structure according to claim 5, characterized in that: A partition plate (37) is arranged above the sealing plate (36), the partition plate (37) is slidably connected to the outer shell (11) by a spring, and the lifting rod (17) penetrates through the partition plate (37).

7. A shock resistant hydraulic valve structure according to claim 6, characterized in that: A rotating ring (38) is rotatably connected to the top of the lifting ring (19), the rotating ring (38) is provided with a blade (39) on the top; a telescopic pipe (4) is sleeved on the lifting rod (17), and the telescopic pipe (4) is rotatably connected with the lifting ring (19), one end of the telescopic pipe (4) is connected with a motor (41) installed on the outer shell (11).

8. A shock resistant hydraulic valve structure according to claim 7, characterized in that: The outer periphery of the lifting ring (19) is provided with a rubber scraping block (42).

9. The impact-resistant hydraulic valve structure of claim 1, wherein: A telescopic rod (43) is arranged between the cleaning plate (21) and the top cover (13), one end of the telescopic rod (43) is fixed to the bottom of the top cover (13), the other end is fixed to the top of the cleaning plate (21), and a liquid level sensor is arranged on the telescopic rod (43).

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