Large-flow super-high-pressure anticorrosion self-cleaning filter

Abstract

The utility model relates to a kind of large-flow superhigh pressure anticorrosive self-cleaning filter, it includes cylinder, filter core and orifice plate assembly component and blowdown component, the filter core and orifice plate assembly component and the blowdown component are all set in the cylinder, the cylinder inner wall is provided with anticorrosive layer;The cylinder with the blowdown component detachably fixed connection in the cylinder;The filter core and orifice plate assembly component include multiple filter cores, the filter core adopts wedge structure and is made of corrosion-resistant high-strength material, and its inner and outer wall is equipped with reinforcing ring.The utility model has the effect of large-flow, superhigh pressure, corrosion-resistant, full-automatic cleaning.

Description

Technical Field

[0001] This utility model relates to the field of industrial filtration equipment technology, and in particular to a high-flow, ultra-high-pressure, corrosion-resistant, self-cleaning filter. Background Technology

[0002] In industrial production, the demand for fluid filtration with large flow rates, ultra-high pressure (e.g., ≥10MPa) and corrosive media (e.g., strong acid and strong alkali solutions with pH 0-14) is increasing. Traditional filtration equipment is unable to simultaneously meet the requirements of high pressure resistance, corrosion resistance and continuous filtration efficiency.

[0003] Traditional corrosion-resistant filters often use integral corrosion-resistant materials (such as titanium alloy), which are expensive. The filter element layout is loose and the filtration area is limited, making it difficult to cope with high flow conditions. The sewage discharge system is simply designed, and backwashing can easily lead to cross-contamination of impurities in different layers, resulting in low cleaning efficiency.

[0004] The existing technical solutions described above have the following drawbacks: Although the existing technologies have achieved filtration to a certain extent, they have the following drawbacks when dealing with high-flow-rate, ultra-high-pressure (≥10MPa) and highly corrosive (pH 0-14) media:

[0005] Firstly, the filter element has insufficient pressure resistance: the traditional filter element structure lacks effective support and is easily deformed and fraying under the impact of ultra-high pressure fluid, leading to filtration failure; frequent shutdowns to replace the filter element not only affect the continuity of production, but also increase maintenance costs.

[0006] Secondly, corrosion protection is costly and inefficient: traditional corrosion-resistant filters rely on expensive integral corrosion-resistant materials such as titanium alloys, resulting in high costs. Furthermore, the filter element layout is loose, limiting the filtration area per unit space, making it difficult to meet the demands of high-flow-rate applications.

[0007] Third, maintenance is difficult: traditional filters have a complex structure and a complicated disassembly and assembly process. Once a component is damaged, the entire filter often needs to be replaced, which further increases maintenance costs and downtime. Utility Model Content

[0008] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a high-flow, ultra-high pressure, corrosion-resistant, and fully automatic self-cleaning filter.

[0009] The above-mentioned utility model objective is achieved through the following technical solution:

[0010] A high-flow, ultra-high-pressure corrosion-resistant self-cleaning filter includes a cylindrical body, a filter element and perforated plate assembly, and a sewage discharge assembly. The filter element and perforated plate assembly and the sewage discharge assembly are both disposed within the cylindrical body, and the inner wall of the cylindrical body is provided with an anti-corrosion layer. The cylindrical body and the sewage discharge assembly are detachably and fixedly connected.

[0011] The filter element and perforated plate assembly includes multiple filter elements. The filter elements adopt a wedge-shaped structure and are made of corrosion-resistant and high-strength material. The diameter of the filter elements is 20mm to 100mm, and reinforcing rings are provided on both the inner and outer walls.

[0012] Through the above technical solutions, this filter achieves four core performance characteristics: high corrosion resistance, ultra-high pressure adaptability, large flow rate capacity, and convenient maintenance. Specifically: the anti-corrosion layer on the inner wall of the cylinder directly enhances the overall corrosion resistance of the equipment; the filter element is made of corrosion-resistant, high-strength materials such as duplex stainless steel and Hastelloy, combined with a rigid support structure of inner and outer wall reinforcing rings, effectively strengthening its pressure resistance and ensuring structural stability under ultra-high pressure environments; the sewage discharge component adopts a detachable design, simplifying disassembly, cleaning, and replacement processes, enabling rapid maintenance and reducing downtime; furthermore, the filter element uses a small-diameter (20mm~100mm) wedge structure, which significantly increases the total filtration area through dense arrangement. Its wedge-shaped gap characteristic, wider on the outside and narrower on the inside, ensures that impurities only accumulate on the surface, improving filtration efficiency and making it easier to remove impurities during backwashing, thus guaranteeing continuous filtration capacity under high flow conditions.

[0013] As a further technical solution of this utility model: the cylinder includes an upper cover, an upper cylinder and a lower cylinder, the upper cover and the upper cylinder are detachably connected, and the upper cylinder and the lower cylinder are detachably fixed; the inner walls of the upper cover, the upper cylinder and the lower cylinder are all provided with anti-corrosion material.

[0014] The above technical solution adopts a split design of upper cover, upper cylinder and lower cylinder, and realizes modular assembly and maintenance with the help of detachable connection structure. It not only facilitates segmented hoisting and transportation and reduces the difficulty of equipment installation, but also allows the upper cover to be opened separately to inspect the filter element or the upper and lower cylinders to be separated to replace the sewage discharge components during disassembly. At the same time, all inner walls in contact with fluid (inner side of upper cover, flow channel of upper cylinder, backwash area of ​​lower cylinder) are treated with anti-corrosion to fully resist corrosion, ensure long-term stable operation of equipment in strong corrosive environment and extend service life.

[0015] As a further technical solution of this utility model: the lower cylinder center tube is provided with a sewage discharge fixing ring for fixing the sewage discharge component.

[0016] Through the above technical solutions, the fixed sewage discharge ensures the stable installation and precise positioning of the sewage discharge components under ultra-high pressure conditions to ensure the effectiveness of the self-cleaning function. It disperses the impact force of water flow, enhances the structural strength and pressure resistance of the equipment, and the detachable design facilitates maintenance. In addition, it works in conjunction with the anti-corrosion design of the cylinder to avoid corrosion of the fixing ring and extend the overall life of the equipment.

[0017] As a further technical solution of this utility model, the filter element and perforated plate assembly further includes a filter element perforated plate, a filter element pressure plate, a filter element connecting screw, and a lifting eye nut.

[0018] Both ends of the plurality of filter elements are detachably and fixedly connected to the filter element perforation plate and the filter element pressure plate, respectively.

[0019] Multiple filter element connecting screws pass through the filter element perforated plate and the filter element pressure plate, and one end of each filter element connecting screw is fixed in place with the lifting eye nut.

[0020] Through the above technical solution, the filter element perforated plate and filter element pressure plate are fixed to the filter element by the filter element connecting screw and lifting eye nut, forming a stable axial pre-tightening assembly structure to ensure reliable fixation of the filter element under high pressure conditions.

[0021] As a further technical solution of this utility model: the top of the sewage discharge component is provided with a main shaft, which passes through the central tube of the lower cylinder from bottom to top, and the filter element perforated plate has a central shaft hole and is connected to a transmission shaft assembly.

[0022] Through the above technical solution, the main shaft of the sewage discharge component passes through the central tube of the lower cylinder and the shaft hole of the filter element plate, forming a rigid positioning reference. The rigid connection between the main shaft and the transmission shaft assembly provides vertical support for the upper cylinder, which can withstand the fluid impact force under ultra-high pressure and prevent the filter element from deforming due to top pressure displacement.

[0023] As a further technical solution of this utility model: the sewage discharge assembly includes a plurality of sewage discharge pipes, each of the sewage discharge pipes is provided with a sewage discharge pipe rotating shim, and the sewage discharge pipe rotating shim has holes corresponding to the holes of the filter element perforated plate.

[0024] Through the above technical solution, the combination of multiple drain pipes and the hole alignment mechanism of rotating pads enables precise cleaning of multiple filter elements sequentially or in groups, maintaining filtration continuity while improving self-cleaning efficiency.

[0025] As a further technical solution of this utility model: the bottom end of the sewage discharge component is provided with a sewage collection port, and the sewage collection port is provided with a wear-resistant and corrosion-resistant gasket joint.

[0026] Through the above technical solution, the wear-resistant and corrosion-resistant gasket joint set at the sewage collection port has both corrosion resistance and erosion resistance, ensuring the long-term sealing reliability of the sewage collection port under high pressure medium.

[0027] As a further technical solution of this utility model: it includes a driving device disposed on the top of the upper cover, the driving device being connected to the transmission shaft assembly via the transmission shaft, and an indexing plate being mounted on the transmission shaft for aligning the holes opened on the drain pipe rotating pad with the holes opened on the filter element perforated plate.

[0028] Through the above technical solution, the drive device drives the indexing plate through the transmission shaft. The contacts of the indexing plate correspond one-to-one with the outer ring holes of the filter element orifice plate, so as to achieve precise synchronous alignment between the holes of the drain pipe rotating gasket and the corresponding holes of the filter element orifice plate. This forms a smooth fluid channel during backwashing, ensuring that the high-pressure backwashing fluid accurately acts on the target filter element area.

[0029] In summary, this utility model has at least one of the following beneficial technical effects:

[0030] 1. This utility model discloses a high-flow-rate, ultra-high-pressure, corrosion-resistant, self-cleaning filter, which achieves high-flow-rate filtration under ultra-high-pressure and corrosion-resistant conditions by setting an anti-corrosion layer on the inner wall of the cylinder, using a high-pressure, corrosion-resistant, high-strength filter element with a reinforcing ring, thereby improving filtration efficiency and equipment life.

[0031] 2. This utility model discloses a high-flow, ultra-high pressure, corrosion-resistant, and self-cleaning filter, which achieves convenient installation and maintenance, high-pressure stability of the filter element, precise cleaning of multiple filter elements, and reliable backwashing through a modular and detachable cylindrical structure, axial fixing of the filter element, a multi-drainage pipe rotating gasket hole alignment mechanism, automatic positioning of the indexing plate, and wear-resistant and corrosion-resistant joints.

[0032] 3. This utility model discloses a high-flow-rate, ultra-high-pressure corrosion-resistant self-cleaning filter, which uses the main shaft of the sewage discharge component to pass through the central tube of the lower cylinder, the central shaft hole of the filter element perforated plate, and connect with the transmission shaft, thereby achieving precise coaxial positioning of the sewage discharge component and the cylinder, transmission stability, and unified assembly benchmark of the upper cylinder. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0034] Figure 2 This is a front view of the upper end cap in Embodiment 1 of this utility model.

[0035] Figure 3 This is a top view of the upper end cap in Embodiment 1 of this utility model.

[0036] Figure 4 This is a front view of the upper cylinder in Embodiment 1 of this utility model.

[0037] Figure 5 This is a top view of the upper cylinder in Embodiment 1 of this utility model.

[0038] Figure 6 This is a front view of the lower cylinder in Embodiment 1 of this utility model.

[0039] Figure 7 This is a top view of the lower cylinder in Embodiment 1 of this utility model.

[0040] Figure 8This is a front view of the filter element and perforated plate assembly in Embodiment 1 of this utility model.

[0041] Figure 9 This is a top view of the filter element and perforated plate assembly in Embodiment 1 of this utility model.

[0042] Figure 10 This is a front view of the sewage discharge fixing ring in Embodiment 1 of this utility model.

[0043] Figure 11 This is a top view of the sewage fixing ring in Embodiment 1 of this utility model.

[0044] Figure 12 This is a front view of the sewage discharge component in Embodiment 1 of this utility model.

[0045] Figure 13 This is a top view of the sewage discharge component in Embodiment 1 of this utility model.

[0046] Figure 14 This is a front view of the drive shaft assembly in Embodiment 1 of this utility model.

[0047] Figure 15 This is a front view of the indexing plate in Embodiment 1 of this utility model.

[0048] Reference numerals: 1. Lower end cap; 2. Drain port; 3. Feed port; 4. Filter element perforated plate; 5. Filter element; 6. Drive unit; 7. Upper end cap; 8. Discharge port; 9. Sewage outlet; 10. Sewage discharge assembly; 11. Rotary joint; A1. Upper cover; A11. Motor reducer bracket; A2. Upper cylinder; A3. Lower cylinder; A31. Sewage discharge fixing ring; A4. Filter element and perforated plate assembly assembly; A43. Filter element pressure plate; A44. Filter element connecting screw; A45. Lifting eye nut; A51. Sewage discharge pipe rotating gasket; A52. Wear-resistant and corrosion-resistant gasket joint; A53. Main shaft; A6. Transmission shaft assembly; A61. Transmission shaft; A7. Indexing plate; A71. Indexing plate fixing ring. Detailed Implementation

[0049] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0050] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0052] Example 1:

[0053] Reference Figure 1 This utility model discloses a high-flow, ultra-high pressure, corrosion-resistant, self-cleaning filter, comprising a cylinder, a filter element and perforated plate assembly A4, and a drain assembly 10. The drain assembly 10 is detachably fixed to the cylinder via a flange connection, facilitating overall disassembly for cleaning or replacement of components during maintenance, thus shortening downtime. The filter element and perforated plate assembly A4 is installed inside the cylinder and performs the core filtration function.

[0054] Reference Figure 1 , Figure 2 , Figure 4 and Figure 6 The cylinder body includes an upper cover A1, an upper cylinder A2, and a lower cylinder A3. The inner walls of all three parts are equipped with anti-corrosion layers (such as Teflon coating or stainless steel lining) or are made of anti-corrosion materials such as 316L stainless steel. It can resist the corrosion of corrosive media such as acids, alkalis, and salts, such as 10% HCl and 48% HF solutions, extend the service life of the equipment, and avoid corrosion products from contaminating the filter media. Compared with the overall anti-corrosion material, the cost is reduced by more than 50%.

[0055] Reference Figure 3 , Figure 5 and Figure 7The upper cover A1 is connected to the upper cylinder A2, and the upper cylinder A2 is connected to the lower cylinder A3 via flange structures. Sealing gaskets, such as spiral wound gaskets and fluororubber O-rings, are installed at the connection points between each component. Combined with bolt tightening, this ensures no leakage under extreme high-pressure environments and guarantees that the seal can be repeatedly disassembled without compromising its sealing performance. Furthermore, corrosion protection can be achieved using techniques such as thermal spraying of a ceramic layer, electroplating of corrosion-resistant metal, lining with glass flake putty, or composite coatings (base layer electroplating + top layer spraying). These treatment methods significantly improve the inner wall surface hardness to ≥HV500 and surface roughness Ra≤0.8μm, effectively reducing impurity adhesion, lowering fluid resistance, and thus optimizing filtration efficiency.

[0056] Reference Figure 1 and Figure 6 The lower cylinder A3 includes a lower end cap 1, with a drain port 2 and a feed port 3 on one side. The feed port 3 is located on the bottom side of the filter, allowing the filter medium to be smoothly fed into the filter element 5 using fluid pressure or gravity. The drain port 2 is located at the bottom of the filter and is mainly used to drain residual liquid during filter maintenance and repair. The other side of the lower cylinder A3 has a drain port 9, located on the bottom side of the filter and close to the filter element 5. It is connected to the drain collection port at the bottom of the drain assembly 10 through a drain pipe, facilitating the discharge of impurities, contaminants, and wastewater flushed down from the filter element 5.

[0057] Reference Figure 7 , Figure 10 and Figure 11 A drain fixing ring A31 is provided on the central pipe of the lower cylinder A3. Its function is to fix the drain assembly 10 stably installed in the lower cylinder A3, ensuring that the drain assembly 10 maintains the correct position during equipment operation and preventing displacement of the drain assembly 10 due to vibration, high pressure, or other factors, thus ensuring the stable and reliable drain function. In addition, the drain fixing ring A31 can be made of corrosion-resistant materials (such as stainless steel, fluoroplastics, etc.) or coated with an anti-corrosion layer, which together with the anti-corrosion layer on the inner wall of the cylinder forms an anti-corrosion sealing system to prevent corrosive media (such as fluids containing acids, alkalis, and salts) from leaking from the connection.

[0058] Reference Figure 1 , Figure 4 and Figure 5 The upper cylinder A2 has an outlet 8 on one side. The outlet 8 is located on the top side of the filter and is diagonally distributed with the inlet 3 to ensure that the fluid is fully filtered by the filter element 5.

[0059] Reference Figure 2 and Figure 3The upper cover A1 includes an upper end cap 7, with a motor and reducer bracket A11 mounted on the top of the upper end cap 7. The drive unit 6 is placed on the motor and reducer bracket A11. The drive unit 6 is the core of the power control for the high-pressure corrosion-resistant filter and typically includes a motor, a reducer, and a transmission shaft assembly A6. The motor provides power, and the reducer is responsible for reducing speed and increasing torque, driving the filter element 5 or valve to operate stably under high pressure. The backwashing sequence is controlled by precisely adjusting the speed and direction.

[0060] Reference Figure 8 The filter element and perforated plate assembly A4 includes filter element 5, filter element perforated plate 4, filter element pressure plate A43, filter element connecting screw A44, and lifting eye nut A45. (Refer to...) Figure 9 Both the filter element perforated plate 4 and the filter element pressure plate A43 have multiple mounting holes, multiple fixing holes, and a central shaft hole. The central shaft hole is located at the center of the filter element perforated plate 4 and the filter element pressure plate A43. The mounting holes are evenly distributed in a ring around the central shaft hole. The fixing holes are also evenly distributed in a ring between the mounting holes, with the central shaft hole as the center. The two ends of the filter element 5 are connected to the mounting holes on the filter element perforated plate 4 and the filter element pressure plate A43 by a detachable fixing connection, and can be fixed by nuts. The filter element connecting screw A44 passes through the fixing holes on the filter element perforated plate 4 and the filter element pressure plate A43. The top end of the filter element connecting screw A44 passes through the filter element pressure plate A43 and is threaded into and fixed with the eye nut A45, while its bottom end is threaded and fixedly connected to the filter element pressure plate A43.

[0061] Filter element 5 employs a wedge-shaped structure, made of corrosion-resistant, high-strength materials such as 316L stainless steel and Hastelloy. Stable operation under ultra-high pressure conditions is achieved through material and structural optimization. Its materials can withstand long-term corrosion from highly corrosive media such as 10% HCl and 48% HF solutions. For ultra-high pressure conditions ≥10MPa, duplex stainless steel or carbon fiber composite reinforcing rings are added to the inner and outer walls, using annular ribs (for continuous overall support and uniform pressure distribution) or spirally wound steel wire (to enhance resistance to deformation) structures to improve compressive strength and effectively prevent wire stripping, deformation, or breakage caused by high-pressure impact. The wedge-shaped structure with a wide outer and narrow inner gap design ensures that impurities only accumulate on the surface, preventing clogging, resulting in stable filtration accuracy, low pressure loss, and strong metal frame support. During backwashing, the water flow can quickly remove impurities and restore filtration capacity, eliminating the need for frequent element replacement. Furthermore, small-diameter filter elements of 20mm to 100mm replace conventional sizes, and the high-density annular partitioned array layout within the cylinder increases the total filtration area, meeting the requirements of ≥1000m². 3 To meet the high flow rate filtration requirements, continuous online filtration and efficient backwashing under ultra-high pressure are achieved.

[0062] The filter element connecting screw A44 is made of duplex stainless steel. Its bottom end connects to the filter element perforated plate 4 via a fine-pitch thread and anti-loosening washer. The top end passes through the filter element pressure plate A43 and is secured by the eye nut A45, creating an axial preload of 500–1000 N. This preload withstands ultra-high pressure fluid impact and allows for stable operation in highly corrosive media with pH values ​​of 1–14. The eye nut A45 supports rapid hoisting of the filter element and perforated plate assembly A4, improving installation efficiency by over 50%. The preload can be finely adjusted by tightening to accommodate pressure fluctuations of ±2 MPa. A lock nut provides secondary fixation, ensuring a stable connection even under high-frequency vibration.

[0063] Reference Figure 12 and Figure 13 The main shaft A53 at the top of the sewage discharge assembly 10 serves as the core positioning component. It passes sequentially through the central tube of the lower cylinder A3 and the central shaft hole in the filter element perforated plate 4, and is then rigidly connected to the drive shaft A61 before being hoisted onto the upper cylinder A2. During this process, the main shaft A53 is rotatably connected to the drive component via a rotary joint 11, ensuring no leakage during rotation. The fit accuracy between the main shaft A53 and the central tube of the lower cylinder A3 is controlled to a coaxiality ≤0.05mm, and the radial clearance between the main shaft A53 and the central shaft hole of the filter element perforated plate 4 is ≤0.1mm. This double constraint ensures that the sewage discharge assembly 10 is completely aligned with the cylinder axis, preventing rotational jamming or leakage due to eccentricity and wear of the sealing surface. The main shaft A53 is made of high-strength alloy steel such as 42CrMo. Its connection with the drive shaft A61 can withstand a driving torque of ≥800 N·m. Driven by a motor and reducer, it ensures smooth rotation of the sewage discharge assembly 10 with a speed fluctuation of ≤±1%, guaranteeing precise alignment of the sewage discharge pipe rotating shim A51 with the filter element perforated plate 4 holes during backwashing with a deviation of ≤±0.5°. Furthermore, the main shaft A53 serves as a positioning reference when hoisting the upper cylinder A2, ensuring a pipe orifice orientation deviation of ≤1 mm. A copper alloy guide sleeve reduces friction between the main shaft and the filter element perforated plate 4 holes, improving wear resistance.

[0064] Reference Figure 12 and Figure 13 The drain assembly 10 is equipped with three drain pipes, corresponding to the inner, middle, and outer rings of filter elements 5 respectively. Each pipe is equipped with a drain pipe rotating shim A51, which can achieve high-precision rotation of ±0.5° to accurately align with the corresponding ring holes of the filter element perforation plate 4. Independent backwashing is performed on each ring of filter elements 5 to avoid flow interruption caused by simultaneous cleaning of all filter elements 5 and to prevent cross-contamination of impurities between rings, thus improving cleaning efficiency and filtration accuracy. Furthermore, a fluororubber sealing ring is installed between the drain pipe rotating shim A51 and the filter element perforation plate 4 to isolate the drain channel when the holes are not aligned, preventing the direct discharge of insufficiently filtered media.

[0065] The bottom of the sewage collection port of the sewage discharge assembly 10 is equipped with a wear-resistant and corrosion-resistant gasket connector A52, which can be made of high-hardness materials such as tungsten carbide or ceramics (surface hardness ≥ HV1000). It can withstand the erosion of high-speed impurities at speeds ≥15 m / s, and its service life is more than 5 times longer than that of ordinary stainless steel connectors. The connector of the sewage collection port is independently detachable through a flange connection, and can be replaced individually after wear, reducing maintenance costs. At the same time, it adopts a metal bellows seal or a tongue and groove seal structure, maintaining zero leakage even under ultra-high pressure of 30 MPa. Impurities collected in the sewage collection port are discharged through the sewage discharge port 9.

[0066] Reference Figure 1 , Figure 14 and Figure 15 The motor and reducer on the top of the cover A1 are connected to the drive shaft assembly A6 via the drive shaft A61. An indexing plate A7 is mounted on the drive shaft A61, and A7 is securely fixed to the drive shaft A61 by an indexing plate retaining ring A71. The indexing plate retaining ring A71 is made of high-strength metal and is tightly connected to the drive shaft A61 with bolts to prevent displacement or loosening of the indexing plate A7 under high-speed rotation and high-pressure conditions, ensuring its positioning accuracy.

[0067] To achieve high-precision automatic positioning of the rotating shim A51 in the drain pipe and the holes in the filter element perforated plate 4, the high-flow, ultra-high pressure corrosion-resistant self-cleaning filter also incorporates precision position detection elements, such as proximity switches or encoders. These sensors possess high-precision sensing capabilities and, through a "signal trigger-mechanical locking" mechanism, strictly control the positioning error within ±0.5°. The contacts of the indexing plate A7 correspond one-to-one with the holes on the filter element perforated plate 4. During operation, the sensor monitors the rotation angle and position of the indexing plate A7 in real time, aligning it with the holes in different rings of the filter element perforated plate 4. For example, rotating the contacts of the indexing plate A7 by 12° will align them with the middle ring hole of the filter element perforated plate 4. When the system receives a cleaning command, the motor reducer drives the transmission shaft A61 to rotate, and the indexing plate A7 rotates synchronously under the fixing action of the indexing plate fixing ring A71 until the holes of the rotating shim A51 in the drain pipe are precisely aligned with the corresponding ring holes of the filter element perforated plate 4. At this point, the mechanical locking device is activated to ensure precise opening and closing of the drain channel during backwashing, guaranteeing an efficient and stable washing process.

[0068] The assembly steps of this utility model for a high-flow, ultra-high pressure, corrosion-resistant, self-cleaning filter are as follows:

[0069] 1. Installation of lower cylinder A3 and sewage discharge assembly 10

[0070] Place a gasket on the flange face of the lower cylinder A3, and insert the main shaft A53 of the sewage discharge assembly 10 into the center tube of the lower cylinder A3 to ensure coaxiality ≤0.05mm.

[0071] 2. Hoisting of filter element and perforated plate assembly A4

[0072] The filter element and perforated plate assembly A4 is hoisted into the lower cylinder A3 as a whole, so that the main shaft A53 at the top of the sewage discharge assembly 10 passes through the central shaft hole of the filter element perforated plate 4 from bottom to top, ensuring that the radial positioning accuracy of the sewage discharge assembly 10 is ≤±0.1mm. The circumferential position of the filter element perforated plate 4 is adjusted so that the mounting holes on the filter element perforated plate 4 are completely aligned with the mounting holes of the filter element pressure plate A43.

[0073] Next, fix filter element 5, place a fluororubber O-ring on the flange sealing surface of filter element perforated plate 4, and insert the lower end interface of filter element 5 into the mounting hole of filter element perforated plate 4 to form a radial seal. Filter element connecting screw A44 passes through the fixing hole of filter element pressure plate A43 and the fixing hole of filter element perforated plate 4. The bottom end of filter element connecting screw A44 is pre-tightened to the threaded hole of filter element perforated plate 4 using a torque wrench. Screw the lifting eye nut A45 into the top extension of filter element connecting screw A44 above filter element pressure plate A43, apply pre-tightening force to filter element connecting screw A44, and ensure that the gap between lifting eye nut A45 and the upper surface of pressure plate is ≤0.05mm.

[0074] 3. Connection between lower cylinder A3 and upper cylinder A2, and connection between upper cylinder A2 and upper cover A1:

[0075] Hoist the upper cylinder A2 above the lower cylinder A3, adjust the position of the bolt holes and pay attention to the orientation of the pipe openings. After the bolt holes are aligned, tighten the bolts and nuts. Tighten the high-strength bolts diagonally.

[0076] Similarly, after installing the top cover A1, place a sealing gasket on the flange face of the cylinder A2 to ensure a sealed connection with the flange of the upper cylinder A2.

[0077] 4. Installation of transmission and control components

[0078] Connect the drive shaft A61 to the motor reducer, install the indexing plate A7, adjust the hole position of the drain pipe rotating shim A51 to align with the corresponding ring hole position of the filter element plate 4 (accuracy ≤ ±0.5°), and complete the assembly after fixing.

[0079] The working process of this utility model's high-flow-rate, ultra-high-pressure, corrosion-resistant, self-cleaning filter is as follows:

[0080] The filtration process of this invention is as follows: The liquid to be filtered enters the cylinder, which consists of an upper cover A1, an upper cylinder A2, and a lower cylinder A3, through the inlet. The inner walls of each component are coated with anti-corrosion material to resist strong corrosive media. After entering, the liquid is evenly distributed on the surface of the filter element 5 inside the cylinder. The filter element 5 is made of corrosion-resistant material and has reinforcing rings on its inner and outer walls, enabling it to withstand ultra-high pressure of ≤30MPa while achieving high-precision filtration. When the liquid passes through the filter element 5, impurities are effectively intercepted on the outside of the filter element, while the clean liquid is collected through the inner channel of the filter element 5 to the outlet for use in subsequent processes. During this process, the two ends of the filter element 5 are detachably fixed by the filter element perforated plate 4 and the filter element pressure plate A43, and are rigidly supported by the filter element connecting screw A44 and the lifting nut A45, ensuring structural stability and reliability under high-pressure conditions and guaranteeing the continuous and stable operation of the filtration process.

[0081] The backwashing process of this utility model is as follows: multiple wedge-shaped filter elements 5 are integrated inside the cylinder. When impurities accumulate on the surface of the filter element 5, when the pressure difference between the inlet and outlet of the filter element 5 reaches a preset value, such as 0.3MPa, or when the time controller is triggered, the control system starts the backwashing process.

[0082] Simultaneously, the motor reducer on the top of the cover A1 drives the transmission shaft A61 to rotate. The angle is precisely controlled by the indexing plate A7. The transmission shaft A61 drives the main shaft A53, causing the drain pipe rotating pad A51 of the drain assembly 10 to precisely align with the target hole of the filter element plate 4. Then, the backwashing process is initiated. The drain valve opens, and the pressure inside the filter element 5 rapidly decreases, creating a negative pressure environment relative to the outside. Under this negative pressure, clean circulating water flows back from the outside of the filter element 5 to the inside, peeling off attached impurities and flushing them to the drain pipe. The impurities are collected through the drain collection port at the bottom of the drain assembly 10, and discharged through the drain pipe into the drain port 9 via the wear-resistant and corrosion-resistant gasket joint A52, ultimately exiting the equipment. After the target filter element 5 has been backwashed, the backwash valve is closed, and the drain pipe rotating pad A51 of the drain assembly 10 aligns with the next set of filter elements 5 for continued backwashing. Once all filter elements 5 have been backwashed group by group, the entire cleaning process is complete. After backwashing is completed, the indexing plate A7 drives the sewage discharge component 10 to reset and close the sewage discharge channel.

[0083] The implementation principle of this utility model is as follows: This utility model achieves modular maintenance through a split cylindrical structure (the upper cover A1, the upper cylinder A2, and the lower cylinder A3 are detachably connected). The inner wall of the cylinder is provided with an anti-corrosion coating to resist strong corrosive media. It adopts a wedge-shaped filter element 5 with a diameter of 20mm to 100mm, and its inner and outer walls are welded with reinforcing rings. The high-density arrangement (≥35 elements / cylinder) improves the compressive strength and filtration area. Combined with the indexing plate A7 driving the drain pipe to rotate the gasket A51 for precise positioning, it realizes zoned backwashing (time <30 seconds), ensuring online continuous filtration under ultra-high pressure conditions, and overcoming the technical bottlenecks of traditional equipment such as poor high pressure resistance, high anti-corrosion cost, and low cleaning efficiency.

[0084] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A high-flow-rate, ultra-high-pressure corrosion-resistant self-cleaning filter, comprising a cylindrical body, a filter element and perforated plate assembly (A4), and a drain assembly (10), wherein the filter element and perforated plate assembly (A4) and the drain assembly (10) are both disposed within the cylindrical body, characterized in that, The inner wall of the cylinder is provided with an anti-corrosion layer; The cylinder body and the sewage discharge component (10) are detachably and fixedly connected inside the cylinder body; The filter element and perforated plate assembly (A4) includes multiple filter elements (5). The filter elements (5) adopt a wedge structure and are made of corrosion-resistant and high-strength material. The diameter of the filter elements (5) is 20mm to 100mm, and reinforcing rings are provided on both the inner and outer walls.

2. The high-flow-rate, ultra-high-pressure, corrosion-resistant, self-cleaning filter according to claim 1, characterized in that, The cylinder includes an upper cover (A1), an upper cylinder (A2), and a lower cylinder (A3). The upper cover (A1) is detachably and fixedly connected to the upper cylinder (A2), and the upper cylinder (A2) is detachably and fixedly connected to the lower cylinder (A3). The inner walls of the upper cover (A1), the upper cylinder (A2), and the lower cylinder (A3) are all provided with anti-corrosion material.

3. The high-flow-rate, ultra-high-pressure, corrosion-resistant, self-cleaning filter according to claim 2, characterized in that, The lower cylinder (A3) is equipped with a sewage discharge fixing ring (A31) in the central tube for fixing the sewage discharge assembly (10).

4. The high-flow-rate, ultra-high-pressure, corrosion-resistant, self-cleaning filter according to claim 2, characterized in that, The filter element and perforated plate assembly (A4) also includes a filter element perforated plate (4), a filter element pressure plate (A43), multiple filter element connecting screws (A44), and eye bolt nuts (A45). Both ends of the plurality of filter elements (5) are detachably and fixedly connected to the filter element perforated plate (4) and the filter element pressure plate (A43); Multiple filter element connecting screws (A44) pass through the filter element perforated plate (4) and the filter element pressure plate (A43), and one end of the filter element connecting screw (A44) is fixed with the eye nut (A45).

5. A high-flow-rate, ultra-high-pressure, corrosion-resistant, self-cleaning filter according to claim 4, characterized in that, The top of the sewage discharge component (10) is provided with a main shaft (A53). The main shaft (A53) passes through the central tube of the lower cylinder (A3) and the central shaft hole of the filter element plate (4) from bottom to top, and is connected to the transmission shaft assembly (A6).

6. A high-flow-rate, ultra-high-pressure, corrosion-resistant, self-cleaning filter according to claim 5, characterized in that, The sewage discharge assembly (10) includes multiple sewage discharge pipes, each of which is provided with a sewage discharge pipe rotating shim (A51), and the sewage discharge pipe rotating shim (A51) has holes corresponding to the holes of the filter element perforated plate (4).

7. A high-flow-rate, ultra-high-pressure, corrosion-resistant, self-cleaning filter according to claim 1, characterized in that, The bottom end of the sewage discharge component (10) is provided with a sewage collection port, and the sewage collection port is provided with a wear-resistant and corrosion-resistant gasket joint (A52).

8. A high-flow-rate, ultra-high-pressure, corrosion-resistant, self-cleaning filter according to claim 6, characterized in that, It also includes a drive device (6) disposed on the top of the upper cover (A1), the drive device (6) being connected to the drive shaft assembly (A6) via a drive shaft (A61), on which a dividing plate (A7) is mounted for aligning the holes of the drain pipe rotating pad (A51) with the holes of the filter element perforated plate (4).

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