Press type filter disc device convenient for replacing membrane

Abstract

The invention relates to a push type filter disc device convenient for replacing a membrane, comprising: a filter assembly comprising a filter disc upper disc body (3), a filter disc lower disc body (4), a filter membrane (8), a filter screen lining plate (7), a liquid inlet joint and a liquid outlet joint; the filter screen lining plate (7) is fixedly mounted in the lower disc body (4) of the filter disc through a filter screen lining plate mounting system and provides support for the filter membrane (8); the filter membrane (8) is flatly laid on the surface of the filter screen lining plate (7) and is tightly attached to the filter screen lining plate (7); the liquid inlet joint and the liquid outlet joint are connected with an upper filter disc body (3) and a lower filter disc body (4) of the filter disc device; the upper disc body (3) of the filter disc is a pressure-bearing sealing and fluid guiding component, the lower disc body (4) of the filter disc is used for supporting a filter piece and collecting filtrate, and the filter membrane (8) is used for precisely separating a medium; and the pressing type buckle components are distributed on the edges of the upper filter disc body (3) and the lower filter disc body (4) and are used for pressing, clamping and connecting the upper filter disc body (3) and the lower filter disc body (4).

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of filtering equipment, in particular to a pressing type filter disc device with membrane convenient to replace. BACKGROUND

[0002] In the field of filtration technology, filter discs serve as core components, and the convenience of membrane replacement directly affects the efficiency and cost of filtration work. Traditional filter discs often use screws, clamps, and flanges for installation and fixation. When using threaded connections, the upper and lower discs of the filter disc are tightened through pre-processed matching threads on the edges. This connection method is common in many small laboratory filtration devices. Its advantage is that during initial installation, threaded connections can provide stable tightening force, ensuring a certain degree of sealing of the filter disc and allowing normal filtration work to proceed. However, once the routine maintenance operation of filter membrane replacement is involved, the disadvantages of threaded connections become apparent. Operators must use screwdrivers, wrenches, and other tools to tighten the screws, a process that is extremely tedious and requires a lot of time and effort for each tightening operation. Moreover, since filter equipment may need to replace the filter membrane frequently during daily use, the threads are extremely susceptible to wear and tear during repeated tightening. Once the threads slip, the stability of the connection between the upper and lower discs will be severely compromised, not only failing to ensure the normal sealing of the filter disc, but also possibly rendering the entire filter disc unusable, directly causing damage to the equipment and a significant increase in operating costs. Clamp connection is also one of the commonly used fastening methods. It is often seen on small filter devices in some industrial fields, such as small filter tanks. The operation of clamp connection is relatively simple and does not require complex technology and specialized tools. During installation, the clamp is simply placed on the connection between the upper and lower discs of the filter disc and tightened. This makes clamp connection advantageous in scenarios where installation convenience is required. However, clamp connection has poor stability. During equipment operation, affected by factors such as vibration, temperature changes, and fluctuations in filter liquid pressure, the clamp can gradually loosen. Once the clamp loosens, the seal between the upper and lower discs of the filter disc will fail, causing leaks during the filtration process. This not only reduces filtration efficiency and wastes filter materials, but also can pollute the surrounding environment, severely affecting the normal progress of filtration work. In addition, clamp connection has high requirements for the size accuracy of the connection between the upper and lower discs. If the size is slightly off, it will be difficult to achieve good tightening and sealing effect. Flange connection involves installing flange plates on the upper and lower discs of the filter disc, tightly connecting the two flange plates with bolts, and adding a sealing gasket in between to ensure sealing. This connection method is widely used in large industrial filtration equipment, such as large filter tanks in sewage treatment plants, where sealing and strength requirements are extremely high. Flange connection can withstand high pressure and temperature changes, has excellent sealing performance and high connection strength, and can ensure the stable operation of filtration equipment in harsh conditions. However, it is not to be ignored that flange connection has high cost and complex operation problems. On the one hand, the procurement cost of flange plates, bolts, nuts, and sealing gaskets is high, increasing the overall investment in equipment.On the other hand, during installation and disassembly, multiple people are required to cooperate, and a large number of bolts are tightened or loosened one by one, the operation process is cumbersome, and a large amount of manpower and time is consumed. Moreover, the space occupied by the flange connection is large, and the installation environment and layout of the equipment are relatively strict, which limits the flexibility of its application to a certain extent.

[0003] In summary, the traditional upper and lower disc fastening mode of the filter disc has problems such as cumbersome operation, high maintenance cost, poor sealing stability, limited application scenarios, etc. in actual use. Most of the existing filter discs do not have the functions of quick opening and closing, and cannot meet the requirements of quick maintenance and adjustment of the filter device in emergency situations. Therefore, developing a new type of filter disc upper and lower disc fastening mode that can effectively solve the above problems has become a key technical problem that needs to be broken through in the industry. SUMMARY

[0004] The purpose of the present application is to provide a pressing type filter disc device with replaceable membrane, which aims to solve the above problems and provide an innovative pressing type filter disc device to improve the overall performance and user experience of the filter equipment, overcome the defects of the traditional upper and lower disc fastening mode of the filter disc, and provide a pressing type filter disc device with replaceable membrane. Through innovative pressing structure design, the upper and lower discs of the filter disc are quickly opened and closed, greatly improving the convenience of filter membrane replacement, while ensuring good sealing performance and connection stability, reducing maintenance cost and improving the working efficiency of the filter equipment.

[0005] The present application provides a pressing type filter disc device with replaceable membrane, comprising:

[0006] The filter assembly comprises a filter disc upper disc body (3), a filter disc lower disc body (4), a filter membrane (8), a filter screen lining plate (7), a liquid inlet connector and a liquid outlet connector. The filter screen lining plate (7) is fixedly installed in the interior of the filter disc lower disc body (4) through a filter screen lining plate mounting system, and provides a stable support structure for the filter membrane (8). The filter membrane (8) is laid on the surface of the filter screen lining plate (7) and tightly adheres. The liquid inlet connector and the liquid outlet connector are connected with the filter disc upper disc body (3) and the filter disc lower disc body (4) of the filter disc device. The filter disc upper disc body (3) is a core component for pressure sealing and fluid guiding, and the filter disc lower disc body (4) is used for providing support for the filter element and collecting the filtrate. The filter membrane (8) is used for precise separation medium.

[0007] The pressing type buckle assembly is distributed at the edges of the filter disc upper disc body (3) and the filter disc lower disc body (4), and is used for pressing and clamping connection of the filter disc upper disc body (3) and the filter disc lower disc body (4).

[0008] Preferably, the filter screen lining plate mounting system comprises a three-point elastic clamping jaw and a bottom-arranged micro-hole array; the three-point elastic clamping jaw is used to provide clamping force for fixing the filter screen lining plate (7), and the hole groups of the micro-hole array are arranged in a hexagonal close-packed manner.

[0009] Preferably, the filter screen lining plate (7) is mounted below the four-fluorine gasket (5) in which the first sealing ring (6) is embedded, and the edge of the filter screen lining plate (7) is folded downward to be attached to the sidewall of the four-fluorine gasket (5) through the part of the filter screen lining plate mounting system.

[0010] Preferably, the first sealing ring (6) is mounted at the groove of the filter disc upper disc body (3) and the four-fluorine gasket (5), the four-fluorine gasket (5) is placed inside the filter disc lower disc body (4), and the first sealing ring (6) is attached to the inner surface of the filter disc lower disc body (4).

[0011] Preferably, the inlet connector and the outlet connector are mounted with sealing gaskets at the connection positions of the filter disc upper disc body (3) and the filter disc lower disc body (4) of the filter disc device.

[0012] Preferably, the press-type bayonet assembly comprises a plurality of buckles and a plurality of press buckles corresponding to the positions of the buckles, wherein the buckles protrude downward and are arranged at the lower edge positions of the filter disc upper disc body (3), the press buckles are arranged at the edge positions of the filter disc lower disc body (4), the top of each press buckle is designed as an arc surface structure facilitating finger pressing, the lower edge of the filter disc upper disc body (3) is provided with a plurality of self-locking studs (10), the corresponding positions inside the edge of the filter disc lower disc body (4) are provided with clamping grooves matched with the press buckles and embedded reset springs (11), the side edge of the filter disc lower disc body (4) is provided with a check damper (12) at the corresponding position, and the check damper (12), the reset spring (11), the self-locking stud (10) and the clamping groove cooperate to realize the connection and separation of the filter disc upper disc body (3) and the filter disc lower disc body (4).

[0013] Preferably, the positions and quantities of the self-locking studs (10) of the filter disc upper disc body (3) and the clamping grooves of the edge of the filter disc lower disc body (4) are one-to-one corresponding; when the self-locking studs (10) are clamped into the clamping grooves of the edge of the filter disc lower disc body (4), the filter disc upper disc body (3) and the filter disc lower disc body (4) are preliminarily connected.

[0014] Preferably, when starting the filter membrane replacement process, press the plurality of press buttons simultaneously by fingers to press the plurality of check valves arranged at the edge of the lower disc body (4) of the filter disc, so that the reset spring (11) is retracted inward, the buckle of the upper disc body (3) of the filter disc is separated from the clamping groove, the self-locking stud (10) is separated from the clamping groove of the lower disc body (4) of the filter disc, the upper disc body (3) of the filter disc is lifted upward, and the upper disc body and the lower disc body are separated, the old filter membrane (8) is taken out, and a new filter membrane is replaced; when starting the fixed installation process of the upper disc body (3) of the filter disc and the lower disc body (4) of the filter disc, the upper disc body (3) of the filter disc is aligned with the lower disc body (4) of the filter disc, the buckle is aligned with the clamping groove, the upper disc body (3) of the filter disc is pressed slightly, the press button is automatically clamped into the clamping groove under the action of the elasticity of the press button, and the quick fixed installation is completed.

[0015] Preferably, the upper disc body (3) of the filter disc device is a double-layer composite cavity structure, the upper layer of the double-layer composite cavity structure is a circular pressure distribution cavity, and the lower layer is a filter membrane pressing ring groove with a certain depth; the top of the upper disc body (3) of the filter disc is integrated with a conical fluid accelerator, and the bottom has a stepped sealing surface formed by a main sealing ring and an auxiliary elastic sealing groove; the liquid inlet connector adopts a quick plug type clamping sleeve structure and is provided with a vacuum pressure relief valve; and the bottom of the lower disc body (4) of the filter disc comprises a radial flow guide rib and a liquid outlet cavity provided with a vortex deceleration structure.

[0016] Preferably, the upper disc body (3) of the filter disc device and the lower disc body (4) of the filter disc are made of transparent acrylic or stainless steel.

[0017] The press-type filter disc device with a membrane convenient to replace has the following beneficial effects:

[0018] (1) Efficient and convenient replacement of the membrane: the design of the press-type buckle assembly makes the opening and closing operation of the filter disc simple and fast, without the need for any tool, and the replacement of the membrane can be completed in a short time, greatly improving the work efficiency.

[0019] (2) Reliable sealing performance: the arrangement of the plurality of sealing washers effectively prevents liquid leakage, and ensures the stability of the filtration process and the reliability of the filtration effect.

[0020] (3) Strong material adaptability: the transparent acrylic and the stainless steel can be selected, meeting the requirements of different scenes for visibility and strength, and expanding the application range of the filter disc device.

[0021] (4) Stable and durable structure: the press buckle assembly is made of high-strength material, has good elasticity and durability, and the self-locking stud, reset spring, check stop sheet and other components are reasonably designed and applied, which enhances the stability of the overall structure of the filter disc, and the components can maintain stable performance after multiple pressing operations, prolonging the service life of the filter disc device.

[0022] (5) Tool-free operation design: the buckle opening force is 12N, which meets the ergonomics EN 894-3 standard.

[0023] (6) Zero contact filter membrane technology: the micro convex points on the lining plate and the edge boss are used for suspension positioning, which avoids artificial contact pollution, and the microbial control is ≤1 CFU / 100 cm².

[0024] (7) Heat compensation capability: under the condition of ΔT=100℃, the sealing surface pressure drop is less than 5%, which is more than 20% compared with the traditional structure, and the technical effect is obvious. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present application, the drawings needed to be used in the specific embodiments or related technology description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0026] Figure 1 is the front view of the filter disc of the present application;

[0027] Figure 2 is the sectional view of the filter disc of the present application;

[0028] Figure 3 is the top view of the filter disc of the present application;

[0029] Figure 4 is the left view of the filter disc of the present application;

[0030] Figure 5 is the right view of the filter disc of the present application;

[0031] Figure 6 is the bottom view of the filter disc of the present application.

[0032] In the drawings: 1 - filter disc inlet joint; 2 - locking nut; 3 - filter disc upper disc body; 4 - filter disc lower disc body; 5 - fluorine gasket;

[0033] 6 - first sealing ring; 7 - filter screen lining plate; 8 - filter membrane; 9 - second sealing ring; 10 - self-locking stud; 11 - reset spring;

[0034] 12 - check stop sheet. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] like Figures 1 to 6 As shown, this embodiment provides a press-type filter disc device for easy membrane replacement, comprising:

[0039] The filtration assembly includes an upper filter disc 3, a lower filter disc 4, a filter membrane 8, a filter screen liner 7, an inlet connector, and an outlet connector. The filter screen liner 7 is fixedly installed inside the lower filter disc 4 via a filter screen liner installation system, providing a stable support structure for the filter membrane 8. The filter membrane 8 is laid flat on the surface of the filter screen liner 7 and fits tightly. This installation method ensures the stability of the filter membrane during the filtration process and facilitates the removal or installation of the filter membrane when replacing it. The inlet connector and the outlet connector are connected to the upper filter disc 3 and the lower filter disc 4 of the filter disc assembly. The upper filter disc 3 is the core component for pressure sealing and fluid guidance, the lower filter disc 4 provides support for the filter element and filtrate collection, and the filter membrane 8 is used for precise separation of media. The filter screen liner installation system includes three-point elastic claws and a microporous array configured at the bottom.

[0040] Pressing buckle assembly, distributed on the edge of the filter disc upper disc body 3 and the filter disc lower disc body 4, is used for pressing and clamping connection of the filter disc upper disc body 3 and the filter disc lower disc body 4; the connection mode discards the traditional screw or hose clamp fixing, and greatly simplifies the opening and closing operation of the disc body.

[0041] In the embodiment:

[0042] (I) the structure design of the filter disc upper disc body

[0043] 1, three-dimensional configuration

[0044] (1) double-layer composite cavity structure is adopted: the upper layer is a circular pressure distribution cavity with a diameter of Φ200mm (wall thickness of 8mm), and the lower layer is a filter membrane pressing ring groove with a depth of 15mm, and the difference between the inner and outer ring diameters is controlled to be ±0.05mm (CNC precision machining is guaranteed).

[0045] (2) the top is integrated with a conical fluid accelerator: the inlet cone angle is 30° (optimized according to Bernoulli equation), which can increase the liquid flow rate from 0.5m / s to 2.8m / s, and reduce the risk of solid particle deposition.

[0046] (3) the bottom is designed with a stepped sealing surface: including a main sealing ring (width of 3mm, Ra≤0.8μm) and an auxiliary elastic sealing groove (trapezoidal cross section, depth of 2mm×width of 4mm).

[0047] 2, connection interface

[0048] (1) the liquid inlet connector adopts a quick plug type sleeve structure (in line with DIN 11851 standard), with an inner diameter of Φ12mm and a threaded part of M22×1.5, and is provided with a 316L stainless steel locking ring (tensile strength≥520MPa).

[0049] (2) a vacuum pressure relief valve (diameter Φ3mm) is arranged: when the pressure in the cavity is greater than 0.35MPa, it is automatically opened to prevent the filter membrane from bursting (the bursting limit is verified by FEA to be 0.8MPa).

[0050] 3, materials

[0051] (1) main material: transparent acrylic (PMMA, polymethyl methacrylate), stainless steel material or medical grade polypropylene (PP), grade PPH-M-030 (in line with USP Class VI standard), melt index 12g / 10min (230℃ / 2.16kg), adding 25% glass fiber reinforcement (flexural modulus 3800MPa), stainless steel material is 316L vacuum melted stainless steel, composition control Cr16.8% / Ni10.2% / Mo2.1%, electrolytic polishing Ra≤0.4μm (in line with ASME BPE standard).

[0052] (2) Sealing element: Perfluoroelastomer (FFKM), grade Chemraz® 585, temperature range -25°C~230°C, resistant to strong acid (pH1), strong base (pH14) and organic solvents (tested by ASTM D471).

[0053] (II) Structure design of the lower disc body of the filter disc

[0054] 1. Hydrodynamic optimization

[0055] (1) Radial flow guide ribs (height 5mm, spacing 10° uniform distribution) are designed at the bottom: guide the filtrate to converge to the liquid outlet along 36 flow channels, pressure drop <0.02MPa (CFD simulation verification).

[0056] (2) The liquid outlet cavity adopts a vortex deceleration structure: an internal spiral guide plate (lead angle 45°) is built in, which converts fluid kinetic energy into static pressure energy, avoiding the mixing of air bubbles (air bubble interception rate >99%).

[0057] 2. Filter screen lining plate installation system

[0058] (1) Three-point elastic clamping jaws (material: 17-4PH stainless steel, hardness HRC45) are set: clamping jaw stroke 3mm, clamping force 35N±2N, allowing thermal expansion compensation of the lining plate (ΔL=α·L·ΔT, α=1.2×10⁻ 4 / ℃).

[0059] (2) Micro-hole array (Φ1.2mm×1200 holes) is configured at the bottom: the hole group is densely packed in a hexagonal shape (porosity 38%), and the edge is rounded R0.1mm to prevent filter membrane abrasion.

[0060] 3. Materials

[0061] (1) Main material: transparent acrylic (PMMA, Polymethyl Methacrylate), stainless steel material or medical grade polypropylene (PP), grade PPH-M-030 (compliant with USP Class VI standard), melt index 12g / 10min (230℃ / 2.16kg), reinforced with 25% glass fiber (flexural modulus 3800MPa), stainless steel material is 316L vacuum melted stainless steel, composition control Cr16.8% / Ni10.2% / Mo2.1%, electrolytic polishing Ra≤0.4μm (compliant with ASME BPE standard).

[0062] (2) Surface treatment: in the case of stainless steel material, the surface is covered with a nano TiN coating (thickness 2μm, hardness HV2200), and the friction coefficient is reduced to 0.15 (ASTM G99 test).

[0063] (III) Filter membrane

[0064] 1. Structure design

[0065] (1) Gradient pore structure: surface layer pore size 0.22 μm (PVDF material), bottom support layer pore size 5 μm (PP material), forming an asymmetric filtration gradient (retention efficiency > 99.9999%, challenge bacteria for defective short-celled bacteria).

[0066] (2) Edge reinforcement treatment: membrane perimeter hot melt composite polyester non-woven fabric ring (width 8 mm, grammage 60 g / m²), tensile strength increased to 45 N / cm (ISO 527-3 test).

[0067] (3) Material

[0068] A. Core material: hydrophilic polyvinylidene fluoride (PVDF), grafted with hydroxyethyl methacrylate (HEMA) by plasma, contact angle reduced to 25° (ASTM D7334 test).

[0069] B. Support layer: melt-blown ultra-fine polypropylene fibers, fiber diameter distribution 1-5 μm (SEM detection), porosity 85%±3%.

[0070] (Four) Filter screen lining

[0071] 1. Structure design

[0072] (1) Biomimetic bearing structure

[0073] A. Adopting honeycomb-shaped reinforcement mesh (rib height 2 mm, wall thickness 0.8 mm): unit size Φ3 mm regular hexagon (imitating honeycomb structure), compressive strength up to 18 MPa (ISO 604 test).

[0074] B. Surface with micro-bump array (height 0.3 mm, pitch 2 mm), reducing filter membrane contact area by 60%, reducing adsorption force to ≤0.5 N (facilitating peeling during replacement).

[0075] C. Thermal deformation control, by setting annular expansion joint (width 0.2 mm, depth 1.5 mm), compensating for size fluctuation caused by temperature change (ΔT=80℃, deformation <0.01 mm).

[0076] 2. Material science

[0077] A. Main material: polyether ether ketone (PEEK), grade 450G (Victrex), adding 30% carbon fiber reinforcement (thermal deformation temperature 316℃@1.8 MPa).

[0078] B. Antibacterial treatment: surface coated with nano-silver-titanium dioxide composite layer (Ag 50 ppm, TiO2 100 nm thick), inhibition rate > 99.9% (ISO 22196 test).

[0079] (5) Inlet and outlet connections

[0080] 1. Structure design

[0081] (1) Inlet connection (high-pressure side)

[0082] A. Double sealing structure: front fluororubber O-ring (AS568-214 standard), rear metal face seal (cone angle 60°, surface roughness Ra 0.2 μm).

[0083] B. Anti-siphon design: built-in check valve (spring pre-tightening force 0.15 MPa), automatically locked when the pressure difference is <0.05 MPa (to prevent backflow of filtrate).

[0084] (2) Outlet connection (low-pressure side)

[0085] A. Turbulence suppressor: porous sintered titanium filter element (pore size 10 μm, length 30 mm), reducing Reynolds number from >4000 to <2100 (laminar flow state).

[0086] B. Quick sampling port: integrated Luer lock connector (ISO 594-1 standard), allowing aseptic collection of filtrate samples.

[0087] (3) Materials of inlet and outlet connections

[0088] A. Housing material: Hastelloy C-276 (UNS N10276), with pitting resistance equivalent PREN=68.

[0089] B. Seals: filled graphite polytetrafluoroethylene (PTFE), with compression rate 18%±2% (ASTM F36 test).

[0090] (6) Assembly connection relationship

[0091] 1. Interface coupling of filter membrane 8 and filter screen backing plate 7

[0092] (1) Physical adsorption mechanism: adhesion by surface tension (adhesion force F=2γcosθ / r when contact angle θ<30°, γ being surface tension, r being radius of curvature).

[0093] (2) Anti-displacement structure: positioning boss (height 0.5 mm) provided at the edge of the backing plate, cooperating with the filter membrane punch (Φ199.8 mm) (H7 / g6 class).

[0094] 2. Sealing linkage structure of upper and lower disc bodies is shown in Table 1.

[0095] Table 1

[0096] Assembly Connection parameters Technical role Main sealing ring Interference 0.3mm (Shore hardness 80A) Realize static sealing (pressure resistance 0.6MPa) Elastic sealing groove Pre-compression rate 25% Compensate for ±0.15mm flatness error Buckle pressing surface Linear pressure gradient 8~12N / mm Ensure the uniformity of circumferential sealing

[0097] 3. Mechanical optimization of press-in buckle assembly

[0098] (1) Lever ratio design: fulcrum distance L1 = 8 mm, force arm L2 = 32 mm, mechanical gain K = L2 / L1 = 4 (actual operating force ≤ 15 N).

[0099] (2) Self-locking angle control: buckle slope angle a = 7° (< friction angle f = 8.5°), to ensure that it does not come loose under vibration conditions.

[0100] (3) Fatigue life: after 5000 opening and closing tests, the deformation is less than 0.02 mm (ISO 7500-1 standard).

[0101] 4. Fluid seal of joint and disc body

[0102] (1) Metal surface sealing: lens gasket structure (R = 30 mm spherical surface) is used, contact stress > 200 MPa when bolt pre-tightening force is 35 kN (satisfies ASME B16.20).

[0103] (2) Dynamic sealing ring: combined Y-ring (material FKM), lip interference amount 0.4 mm, friction resistance < 5 N (ISO 3601-3 test).

[0104] (Seven) Technical effect verification of specific implementation

[0105] Filtering efficiency comparison (using 0.22 μm filter membrane), as shown in Table 2 below.

[0106] Table 2

[0107] Parameters Traditional screw fixing This pressing device Lifting amplitude Maximum operating pressure 0.4MPa 0.6MPa +50% Filter membrane replacement time 180±30s 35±5s -80% Dead volume ratio 18% 9.5% -47% Integrity test pass rate 92% 100% +8%

[0108] (Eight) Manufacturing process and quality control standard

[0109] 1. Injection molding process

[0110] (1) The disc body uses variable mold temperature control (T1 = 110°C / T2 = 30°C) to eliminate anisotropy caused by glass fiber orientation (warping amount < 0.15 mm / m).

[0111] (2) Micro-foaming injection molding of filter screen backing plate: supercritical N2 foaming (pressure 25 MPa), density reduction 15% and rigidity maintained.

[0112] 2. Surface treatment

[0113] (1) Electrolytic polishing of stainless steel parts: electrolyte H3PO4: H2SO4 = 3:1, current density 40 A / dm², surface passivation film thickness 2.3 nm (XPS verification).

[0114] (2) Hydrophilic modification of filter membrane: atmospheric pressure plasma treatment (power 800 W, O2 flow rate 50 sccm), hydrophilicity maintained for >12 months.

[0115] 3. Detection standard

[0116] (1) White light interference detection of sealing surface: flatness ≤0.001 mm (ISO 12181 standard).

[0117] (2) Flow laser Doppler verification: flow deviation <±3% (relative to design value) at 0.3 MPa.

[0118] As a preferred embodiment, a first sealing ring 6 is arranged on the contact surface of the upper filter disc body 3 and the lower filter disc body 4, and a second sealing ring 9 is arranged at the connection between the filter disc inlet joint 1 and the upper filter disc body 3, which is in communication with the inside of the filter disc device, for enhancing the overall sealing performance and ensuring that liquid does not leak during the filtration process.

[0119] As a preferred embodiment, a four-fluorine gasket 5 in which the first sealing ring 6 is embedded is installed below the filter screen backing plate 7, wherein the edge of the filter screen backing plate 7 is downwardly turned and adheres to the sidewall of the four-fluorine gasket 5 through the part of the filter screen backing plate mounting system, so as to further improve the sealing effect by utilizing the excellent chemical stability and sealing performance of the four-fluorine gasket.

[0120] As a preferred embodiment, the first sealing ring 6 is installed at the groove of the upper filter disc body 3 and the four-fluorine gasket 5, the four-fluorine gasket 5 is placed inside the lower filter disc body 4, and the first sealing ring 6 is in close contact with the inner surface of the lower filter disc body 4.

[0121] As a preferred embodiment, sealing gaskets are installed at the connection between the liquid inlet joint and the liquid outlet joint and the upper filter disc body 3 and the lower filter disc body 4 of the filter disc device.

[0122] As a preferred embodiment, the press-type bayonet assembly includes a plurality of buckles and a plurality of press buckles corresponding to the positions of the buckles, wherein the buckles protrude downward and are arranged at the lower edge positions of the upper filter disc body 3, the press buckles are arranged at the edge positions of the lower filter disc body 4, the top of each press buckle is designed as an arc surface structure facilitating finger pressing, the lower edge of the upper filter disc body 3 is provided with a plurality of self-locking studs 10, the edge inside of the lower filter disc body 4 is provided with a buckle slot matching the press buckle at the corresponding position, and a reset spring 11 is embedded, the side edge of the lower filter disc body 4 is provided with a check stopper 12 at the corresponding position, and the check stopper 12, the reset spring 11, the self-locking stud 10, and the buckle slot cooperate to realize the connection and separation of the upper filter disc body 3 and the lower filter disc body 4.

[0123] As a preferred embodiment, the self-locking studs 10 of the upper disc body 3 of the filter disc correspond one-to-one with the positions and number of the clamping grooves on the edge of the lower disc body 4 of the filter disc; when the self-locking studs 10 are clamped into the clamping grooves on the edge of the lower disc body 4 of the filter disc, the upper disc body 3 of the filter disc and the lower disc body 4 of the filter disc are preliminarily connected.

[0124] As a preferred embodiment, when starting the filter membrane replacement process, the multiple pressing buckles are pressed simultaneously by fingers to press the multiple non-return flaps 12 arranged on the edge of the lower disc body 4 of the filter disc, so that the reset spring 11 is retracted inwardly, the clamping buckle of the upper disc body 3 of the filter disc is disengaged from the clamping groove, the self-locking stud 10 is disengaged from the clamping groove of the lower disc body 4 of the filter disc, the upper disc body 3 of the filter disc is lifted upward, and the upper disc body and the lower disc body are separated, the old filter membrane 8 is taken out, and a new filter membrane is replaced; when starting the fixed installation process of the upper disc body 3 of the filter disc and the lower disc body 4 of the filter disc, the upper disc body 3 of the filter disc is aligned with the lower disc body 4 of the filter disc, the clamping buckle is aligned with the clamping groove, and the upper disc body 3 of the filter disc is gently pressed, so that the pressing buckle is automatically clamped into the clamping groove under the elastic action of itself, and the fixed installation is completed quickly.

[0125] As a preferred embodiment, in order to meet the needs of different use scenarios, the upper disc body 3 and the lower disc body 4 of the filter disc device are made of transparent acrylic or stainless steel. The transparent acrylic material is convenient for the operator to observe the working state of the filter membrane at any time, such as whether the membrane is blocked or damaged, and problems can be found and handled in time. The stainless steel material has the advantages of high strength, high pressure resistance and corrosion resistance, and is suitable for harsh working environments, such as industrial wastewater filtration, high-pressure liquid filtration and the like.

[0126] Installation and use method:

[0127] Taking the filter disc made of stainless steel as an example, first, check whether the first sealing ring 6, the second sealing ring 9, the PTFE gasket 5, the filter screen lining plate 7 and the filter membrane 8 and the like are intact;

[0128] Ensure that the first sealing ring 6 is correctly installed at the recess of the upper disc body 3 of the filter disc and the PTFE gasket 5, ensure that the second sealing ring 9 is correctly installed at the connection between the filter disc inlet joint 1 and the filter disc device, and confirm that the PTFE gasket 5 is placed inside the lower disc body 4 of the filter disc, and that the first sealing ring 6 is in close contact with the inner surface of the lower disc body 4 of the filter disc;

[0129] Place the filter screen lining plate 7 stably inside the lower disc body 4 of the filter disc, and turn down the edge of the filter screen lining plate 7 to fit the side wall of the PTFE gasket 5, so as to ensure firm installation and accurate position;

[0130] Carefully lay the filter membrane 8 on the filter screen lining plate 7, and pay attention to avoid wrinkles or damage to the filter membrane 8, which will affect the filtering effect;

[0131] Align the upper disc body 3 with the lower disc body 4, and make the self-locking stud 10 of the upper disc body 3 correspond to the clamping groove on the edge of the lower disc body 4 one by one.

[0132] Gently press the upper disc body 4, and hear the "click" sound, indicating that the self-locking stud 10 has been successfully clamped into the clamping groove on the edge of the lower disc body 4, completing the initial connection of the upper disc body 3 and the lower disc body 4 of the filter disc device.

[0133] Install a sealing washer at the connection between the liquid inlet connector and the liquid outlet connector and the disc body of the filter disc device, and install the liquid inlet connector and the liquid outlet connector to the designated position and tighten them.

[0134] The assembly steps of the filter disc made of transparent acrylic material are similar, but attention should be paid to avoid scratching the surface of the acrylic material during operation.

[0135] Install the assembled filter disc device into the filtration system, and connect the liquid inlet connector and the liquid outlet connector to the liquid inlet and liquid outlet pipelines respectively.

[0136] Open the liquid inlet valve, and wait for the filtered liquid to enter the filter disc device through the liquid inlet connector.

[0137] Under the action of pressure, the filtered liquid passes through the filter membrane 8 for filtration, and the impurities are trapped on the surface of the filter membrane 8, and the filtered liquid is discharged through the liquid outlet connector.

[0138] When the filter membrane 8 needs to be replaced, close the liquid inlet valve, press the multiple check flaps 12 arranged on the edge of the lower disc body 4 with fingers at the same time, make the return spring 11 contract inward, and make the self-locking stud 10 disengage from the clamping groove of the lower disc body 4, then lift the upper disc body 3 upward to take out the old filter membrane 8 and replace it with a new one.

[0139] According to the above steps, reassemble and continue the filtration work.

[0140] Note that for the filter disc device made of transparent acrylic material, the state of the filter membrane can be observed at any time during the filtration process, and the filter membrane can be replaced in a timely manner according to the actual situation.

[0141] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiments can be implemented by software, or by means of software plus necessary general hardware platform. Based on such understanding, the technical solutions of the above embodiments can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a U disk, a mobile hard disk, etc.), and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments of the present application.

[0142] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A push filter disc device with a membrane that is easy to replace, characterized in that The application relates to a filter disc device. The filter disc device comprises a filter assembly, a press-type buckle assembly and a filter screen lining plate mounting system; the filter assembly comprises an upper filter disc body (3), a lower filter disc body (4), a filter membrane (8), a filter screen lining plate (7), an inlet joint and an outlet joint; the filter screen lining plate (7) is fixedly installed in the lower filter disc body (4) through the filter screen lining plate mounting system, and provides support for the filter membrane (8); the filter membrane (8) is laid on the surface of the filter screen lining plate (7) and closely adheres to the filter screen lining plate (7); the inlet joint and the outlet joint are connected with the upper filter disc body (3) and the lower filter disc body (4) of the filter disc device; the upper filter disc body (3) is a core component for pressure-bearing sealing and fluid guiding; the lower filter disc body (4) is used for providing support for a filter element and collecting filtrate; and the filter membrane (8) is used as a precise separation medium. The press-type buckle assembly is distributed at the edges of the upper filter disc body (3) and the lower filter disc body (4), and is used for press-buckling connection of the upper filter disc body (3) and the lower filter disc body (4).

2. The push filter disc device of claim 1, wherein, The filter screen lining plate mounting system comprises a three-point elastic clamping jaw and a bottom micro-pore array; the three-point elastic clamping jaw is used for providing clamping force for fixing the filter screen lining plate (7); and the hole groups of the micro-pore array are hexagonally densely arranged.

3. The push filter disc device of claim 2, wherein, A fluorine pad (5) with the first sealing ring (6) embedded in the lower part of the filter screen lining plate (7) is installed; the edge of the filter screen lining plate (7) is downwardly turned and closely adheres to the side wall of the fluorine pad (5) through the part of the filter screen lining plate mounting system.

4. The push filter disc device of claim 3, wherein, The first sealing ring (6) is installed at the recess of the upper filter disc body (3) and the fluorine pad (5); the fluorine pad (5) is placed in the lower filter disc body (4); and the first sealing ring (6) closely adheres to the inner surface of the lower filter disc body (4).

5. The push filter disc device of claim 4, wherein, A sealing gasket is installed at the connection position of the inlet joint and the outlet joint with the upper filter disc body (3) and the lower filter disc body (4) of the filter disc device.

6. The push filter disc device of claim 5, wherein, The press-type buckle assembly comprises a plurality of buckles and a plurality of press buckles corresponding to the positions of the buckles; the buckles protrude downward and are arranged at the lower edge positions of the upper filter disc body (3); the press buckles are arranged at the edge positions of the lower filter disc body (4); the top of each press buckle is designed as an arc surface structure facilitating finger pressing; the lower edge of the upper filter disc body (3) is provided with a plurality of self-locking studs (10); the inner edge of the lower filter disc body (4) is provided with a buckle groove corresponding to the press buckle; a reset spring (11) is embedded in the buckle groove; a check stopper (12) is arranged at the side edge of the lower filter disc body (4); and the check stopper (12), the reset spring (11), the self-locking stud (10) and the buckle groove are matched to realize the connection and separation of the upper filter disc body (3) and the lower filter disc body (4).

7. The push filter disc device of claim 6, wherein, The positions and quantities of the self-locking studs (10) of the upper filter disc body (3) and the buckle grooves of the edge of the lower filter disc body (4) are one-to-one corresponding; when the self-locking studs (10) are buckled into the buckle grooves of the edge of the lower filter disc body (4), the upper filter disc body (3) and the lower filter disc body (4) are preliminarily connected.

8. The push filter disc device of claim 7, wherein, When the filter membrane replacement process is started, the plurality of pressing buckles are pressed by fingers at the same time to press the plurality of check flaps (12) arranged at the edge of the lower disc body (4) of the filter disc, so that the reset spring (11) is retracted inwardly, the buckle of the upper disc body (3) of the filter disc is separated from the clamping groove, the self-locking stud (10) is separated from the clamping groove of the lower disc body (4) of the filter disc, the upper disc body (3) of the filter disc is lifted upward, and the upper disc body and the lower disc body are separated, the old filter membrane (8) is taken out, and a new filter membrane is replaced; when the fixing and mounting process of the upper disc body (3) of the filter disc and the lower disc body (4) of the filter disc is started, the upper disc body (3) of the filter disc is aligned with the lower disc body (4) of the filter disc, the buckle is aligned with the clamping groove, the upper disc body (3) of the filter disc is gently pressed, the pressing buckle is automatically clamped into the clamping groove under the action of the elasticity of the pressing buckle, and the quick fixing and mounting is completed.

9. The push filter disc device of claim 8, wherein, The upper disc body (3) of the filter disc device is a double-layer composite cavity structure, the upper layer of the double-layer composite cavity structure is a circular pressure distribution cavity, and the lower layer is a filter membrane pressing ring groove with a certain depth; the top of the upper disc body (3) of the filter disc is integrated with a conical fluid accelerator, and the bottom has a stepped sealing surface formed by a main sealing ring and an auxiliary elastic sealing groove; the liquid inlet connector adopts a quick insertion type clamping sleeve structure and is provided with a vacuum pressure relief valve; the bottom of the lower disc body (4) of the filter disc comprises a radial flow guide rib and a liquid outlet cavity provided with a vortex deceleration structure.

10. The push filter disc device of claim 9, wherein, The upper disc body (3) of the filter disc device and the lower disc body (4) of the filter disc are made of transparent acrylic or stainless steel.

Images