A diaphragm device for a loudspeaker and a method of manufacturing the same

Abstract

The application discloses a kind of diaphragm equipment with membrane element and its preparation method, it is related to diaphragm equipment technical field, including support plate, two flow guides and two membranes, two flow guides are respectively attached to support plate positive and negative two sides, two membranes are respectively attached to flow guide outside, support plate center is equipped with center water hole, two sides symmetrically are equipped with cow eye flow guide mouth, cow eye and membrane element outer edge are sealed as an organic whole by hot melt welding or adhesive;Its preparation method includes hot melt manufacturing method and adhesive manufacturing method, clearly cutting raw material, positioning sealing, post-processing curing and other core steps and welding, dispensing, key process parameters of compacting.The application dispenses with metal mouth plate and stamping process, manufacturing cost is reduced by 30%-50%, production efficiency is increased by more than 5 times, yield is stabilized at more than 95%, sealing leakage rate is less than 0.1%, service life is extended by more than 30%, suitable for various diaphragm separation equipment.

Description

Technical Field

[0001] This invention relates to the field of vibrating membrane equipment technology, specifically a membrane element for vibrating membrane equipment and its preparation method. Background Technology

[0002] Membrane filtration and separation technology is an important method for material separation and concentration in modern industry, widely used in food and beverage, biomedicine, chemical environmental protection, water treatment and other fields. Vibrating membrane equipment, as a specialized piece of membrane filtration and separation equipment, effectively alleviates concentration polarization and fouling problems on the membrane surface due to its unique vibration and shearing principle, significantly improving membrane flux and separation efficiency. It has irreplaceable advantages in processing high-viscosity, high-solids-content materials.

[0003] The core component of a vibrating diaphragm device is the membrane module, which is assembled from multiple layers of membrane elements through a stacking process. Traditional vibrating diaphragm elements typically consist of two diaphragms, two flow guide nets, and a support plate. Their sealing structure has significant defects: the diaphragms are mainly fixed with glue, while the bullseye flow guide (commonly known in the industry as the "bullseye") is often sealed by stamping metal parts (commonly known as "bullseye plates"), that is, the area around the bullseye is pressed and sealed by metal parts.

[0004] The aforementioned traditional structures and preparation processes have the following problems:

[0005] The process is complex and the production efficiency is low: the upper and lower cover plate accessories need to be made in advance through multiple processes such as mold stamping, flanging, and deburring. Then, the sealing of the bullseye is completed through stamping, pressing and leveling processes. The process is cumbersome and the daily production capacity of a single machine is only a few hundred pieces.

[0006] Low yield: Problems such as diaphragm breakage, die deformation, and poor sealing are prone to occur during the stamping process. The yield of traditional processes is usually only about 70%.

[0007] High production costs: The raw material and processing costs of metal cladding plates are relatively high, and the stamping die wear is large, which further increases the manufacturing cost of membrane elements.

[0008] Unstable sealing performance: Stamped seals rely on mechanical clamping force, which can easily loosen after long-term use, leading to leakage of liquid and affecting the separation effect and the service life of membrane elements.

[0009] Therefore, there is an urgent need for a membrane element for vibrating membrane devices and its preparation method to solve the above problems. Summary of the Invention

[0010] The purpose of this invention is to provide a membrane element for a vibrating diaphragm device and a method for preparing the same, so as to solve the problems mentioned in the background art.

[0011] To achieve the above objectives, the present invention provides the following technical solution:

[0012] A membrane element for a vibrating membrane device includes: a support plate, a flow guide net, and a diaphragm. Two flow guide nets and two diaphragms are provided. The two flow guide nets are respectively attached to the front and back sides of the support plate, and the two diaphragms are respectively attached to the outer sides of the two flow guide nets. A central water outlet is provided at the center of the support plate, and two sets of bullseye flow guides are provided on the support plate, symmetrically arranged on both sides of the central water outlet. Both the flow guide net and the diaphragm have through holes matching the bullseye flow guides and water passage holes matching the central water outlet.

[0013] The diaphragm and the guide net at the bullseye inlet are sealed together by hot-melt welding or adhesive bonding, and the outer edges of the diaphragm, the guide net and the support plate are sealed by hot-melt welding or adhesive bonding.

[0014] As a further aspect of the present invention: the membrane is made of any one of polyethersulfone, polyamide, polysulfone, polyvinylidene fluoride, polytetrafluoroethylene, piperazine, cellulose acetate, polyimide, polyetheretherketone, or polyacrylonitrile; the guide net is made of any one of polypropylene, polyester, polytetrafluoroethylene, or polyvinylidene fluoride; the support plate is a metal support plate or a non-metal support plate, wherein the metal support plate is made of any one of stainless steel plate, titanium plate, or other alloy material plate, and the non-metallic support plate is made of any one of polypropylene plate, polypropylene-glass fiber composite plate, polyester plate, polyester-glass fiber composite plate, polyethylene plate, polyethylene-glass fiber composite plate, nylon plate, polyoxymethylene resin plate, polytetrafluoroethylene plate, or ABS plate.

[0015] As a further aspect of the present invention: the outer diameter of the diaphragm and the guide net is 100-1900 mm, the outer diameter of the support plate is 150-2000 mm, and the diameter of the bullseye guide port is 5-300 mm.

[0016] As a further aspect of the present invention: the hot melt welding is one of ultrasonic welding, electromagnetic induction eddy current welding or hot plate welding.

[0017] As a further aspect of the present invention: the adhesive used for bonding is any one of silicone, acrylic, epoxy resin or polyurethane adhesive.

[0018] A method for preparing a membrane element for a vibrating diaphragm device includes preparing a membrane element for a vibrating diaphragm device as described above, which is prepared by a hot melt manufacturing method or an adhesive bonding manufacturing method.

[0019] As a further aspect of the present invention: the hot-melt manufacturing method includes the following steps:

[0020] S1. Cutting and preparing materials: Cut the diaphragm and guide net to the corresponding size, process the bullseye guide hole in the support plate, and place the cut circular diaphragm and guide net on the front and back sides of the support plate respectively, and position them on the mold of the hot melt welding equipment.

[0021] S2. Sealing welding at the bull's eye: The periphery of the bull's eye guide is welded by hot melt welding process, so that the diaphragm and guide mesh form a seal at the bull's eye guide.

[0022] When the support plate is made of metal or non-metal materials, and the diameter of the bullseye guide hole on the support plate is 10 to 100 mm larger than the diameter of the through hole of the diaphragm and the guide net, the diaphragm and the guide net are heat-fused together and not welded to the support plate.

[0023] When the support plate is made of non-metallic material, and the diameter of the bullseye guide hole on the support plate is basically the same as the diameter of the through hole on the diaphragm and the guide net, the diaphragm, the guide net and the support plate are welded together as one piece.

[0024] S3. Outer edge sealing: Apply a ring of adhesive to the annular area 1-100mm inside the outer diameter of the diaphragm, press the outer edge of the diaphragm tightly with the support plate and allow it to cure initially.

[0025] When the support plate is made of non-metallic material, a hot-melt welding process can be used to hot-melt seal the annular area of ​​1 to 100 mm inside the outer diameter of the diaphragm to the support plate.

[0026] S4. Post-treatment curing: Post-treatment is performed on the pre-cured membrane element to ensure complete curing and obtain the finished product.

[0027] As a further aspect of the present invention: the adhesive manufacturing method includes the following steps:

[0028] T1. Single-sided bonding and sealing: Place the support plate with one side facing up on the dispensing equipment, apply glue around the bullseye guide orifice and in the annular area of ​​1-100mm inside the outer diameter of the diaphragm, place a guide net and a diaphragm in sequence and press them together to initially solidify the three into one.

[0029] T2, Sealing the other side: Flip the support plate so that the other side faces up, repeat the operation of step T1, place another guide net and another membrane in sequence and press them to initially solidify, to obtain the initially formed membrane element;

[0030] When the support plate is made of non-metallic material, the outer edge seal can be replaced by a hot melt welding process, which heat melts and welds the annular area of ​​1 to 100 mm inside the outer diameter of the diaphragm to the support plate.

[0031] T3. Post-processing and curing: Post-processing is performed on the initially formed membrane element to ensure complete curing and obtain the finished product.

[0032] As a further aspect of the present invention: the pressing operation in steps S3, T1 and T2 is performed using a hydraulic press or a cylinder, with a pressure of 0.1 to 25 MPa and a holding time of 1 to 200 s; the dispensing operation is performed using a dispensing machine, with a dispensing amount of 0.05 to 0.2 g / s, a dispensing speed of 1 to 50 mm / s, and a glue line width of 0.5 to 10 mm;

[0033] In step S2, the hot melt welding process is an ultrasonic welding process, an electromagnetic induction eddy current welding process, or a hot plate welding process.

[0034] The parameters for ultrasonic welding are: frequency 15-25KHz, power 1-30KW, welding time 0.2-10s / point, and pressure 0.05-2.5MPa.

[0035] The parameters for electromagnetic induction eddy current welding are: power 1-80KW, heating temperature 150-400℃, welding time 1-600s / piece, pressure holding and cooling time 1-300s / piece, pressure 0.1-2.5Mpa, and cooling and settling time 1-600s.

[0036] The parameters for hot plate welding are as follows: power 1-100KW, preheating temperature of hot plate 150-400℃, welding time 1-600s / piece, pressure holding and cooling time 1-300s / piece, pressure 0.1-2.5Mpa, and cooling and settling time 1-600s.

[0037] As a further aspect of the present invention: the post-processing operation described in steps S4 and T3 involves pressing the membrane element with a hydraulic press or cylinder for 1 to 36 hours at a pressure of 0.1 to 25 MPa.

[0038] Compared with the prior art, the beneficial effects of the present invention are:

[0039] Significantly reduces production costs: It completely eliminates the raw material procurement and processing steps of metal cladding plates in traditional processes, and eliminates the need to make stamping dies. The manufacturing cost of a single membrane element can be reduced by 30% to 50%.

[0040] Significantly improves production efficiency: Both hot melt welding and adhesive bonding processes are automated or semi-automated, with simple procedures. The daily production capacity of a single machine can be increased to several thousand pieces, improving production efficiency by more than 5 times.

[0041] Excellent sealing performance: Hot melt welding integrates the diaphragm, guide net and support plate into one unit at the molecular level, and adhesive sealing forms a continuous and uniform sealing layer. There is no loosening problem of traditional stamping seals, and the leakage rate is reduced to below 0.1%.

[0042] Significantly improved yield: Problems such as diaphragm breakage and end plate deformation during stamping are avoided, and the yield can be stabilized at over 95%.

[0043] Extended service life: The integrated sealing structure improves the mechanical stability of the membrane element, enabling it to withstand high-frequency vibrations in vibrating membrane equipment, and extending its service life by more than 30% compared to traditional membrane elements. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of a membrane element for a vibrating membrane device according to an embodiment of the present invention.

[0045] In the diagram: 1. Diaphragm; 2. Guide net; 3. Support plate; 4. Bullseye guide port; 5. Central outlet. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Please see Figure 1 The membrane element of the vibrating membrane device of the present invention has a symmetrical stacked structure, with a support plate 3 as the intermediate support substrate. A guide net 2 and a membrane sheet 1 are sequentially attached to the front and back sides of the support plate 3, i.e., a guide net 2 is set on each side of the support plate 3, and a membrane sheet 1 is covered on the outer side of each guide net 2. A through-hole 5 is opened at the center of the support plate 3 for the collection and discharge of filtered water. Two sets of through-holes 4 are symmetrically opened on the left and right sides of the through-hole 5. The guide net 2 and the membrane sheet 1 are respectively provided with bull's-eye through holes matching the bull's-eye through holes 4 and central water through holes matching the through-hole 5. The membrane sheet 1 and the guide net 2 around the bull's-eye through holes 4 form a seal, and the outer edge area of ​​the membrane element is also sealed, forming a complete filtration chamber.

[0048] Example 1: Fabrication of non-metallic support plate membrane element using ultrasonic welding process (co-welding of three components + outer edge hot melting)

[0049] The components of the membrane element in this embodiment are as follows:

[0050] Membrane 1: Made of polyethersulfone (PES), with an outer diameter of 200 mm and a bullseye aperture diameter of 15 mm.

[0051] Guide net 1: The material is polypropylene (PP), the outer diameter is the same as that of the diaphragm, which is 200mm, and the size of the bullseye holes is the same as that of diaphragm 1.

[0052] Support plate: It is a non-metallic polypropylene (PP) plate with an outer diameter of 250mm and a bullseye guide port 4 with a diameter of 15mm, which is basically the same as the bullseye through-hole diameter of diaphragm 1 and guide net 2.

[0053] This embodiment uses ultrasonic welding process, and the steps are as follows:

[0054] S1. Cutting and material preparation: Use a die-cutting machine to cut the polyethersulfone film and polypropylene guide net into circular pieces with an outer diameter of 200mm and a bullseye hole diameter of 15mm; use CNC machining equipment to process two sets of bullseye guide holes with a diameter of 15mm on the polypropylene support plate; place the support plate on the lower mold of the ultrasonic welding equipment for positioning, and place the guide net 2 and film 1 on the front of the support plate 3 in sequence, align the holes, and then press them together with the mold for positioning;

[0055] S2. Sealing welding at the bullseye: Ultrasonic welding is used to weld the annular area around the two sets of bullseye guides. The welding parameters are: frequency 20KHz, power 3KW, welding time 2s / point, and welding pressure 0.5MPa. Since the support plate is made of non-metallic material and the diameter of the bullseye guide is consistent with the diameter of the diaphragm and the through hole of the guide net, the diaphragm, the guide net and the support plate are fused together after welding, forming a reliable seal at the bullseye.

[0056] S3. Outer edge sealing: The 10mm inner annular area of ​​the diaphragm is welded using ultrasonic welding. The welding parameters are the same as those for the bullseye welding, so that the outer edges of the diaphragm, the guide net and the support plate are fused and sealed. After completing the welding on one side, the workpiece is flipped over and the above operation is repeated to complete the bullseye welding and outer edge welding on the other side.

[0057] S4. Post-treatment curing: Place the welded membrane element in a hydraulic press and hold it under 0.5MPa pressure for 2 hours to allow the welded fusion zone to cool and solidify fully, thus obtaining the finished membrane element.

[0058] Example 2: Fabrication of metal support plate membrane element using ultrasonic welding process (membrane mesh co-welding + outer edge adhesive bonding)

[0059] The components of the membrane element in this embodiment are as follows:

[0060] Membrane 1: The material is polyamide (PA, nylon membrane), with an outer diameter of 500mm and a bullseye flow port corresponding to a through-hole diameter of 40mm.

[0061] Flow guide net 2: The material is polyester (PET), the outer diameter is the same as that of membrane 1, which is 500mm, and the through hole size is the same as that of membrane 1.

[0062] Support plate: made of 304 stainless steel plate with an outer diameter of 600mm. The diameter of the bullseye guide port 4 is 70mm, which is 30mm larger than the diameter of the bullseye through hole of the diaphragm and guide mesh.

[0063] This embodiment uses ultrasonic welding process, and the steps are as follows:

[0064] S1. Cutting and preparing materials: Cut polyamide membrane and polyester guide net into round pieces with an outer diameter of 500mm and a bullseye hole diameter of 40mm; laser process the center water outlet 5 and bullseye guide port 4 of stainless steel support plate; position support plate 3 in welding mold, and place the front guide net and membrane in sequence, aligning the center hole.

[0065] S2. Sealing welding at the bullseye: Ultrasonic welding is used to continuously weld along the annular area around the bullseye through-hole of the diaphragm. Welding parameters: frequency 20KHz, power 8KW, welding time 5s / revolution, pressure 0.8MPa. Since the support plate 3 is made of metal and the diameter of the bullseye guide port 4 is larger than the through-hole of the diaphragm 1 and the guide net 2, the welding only fuses the diaphragm 1 and the guide net 2 into one piece, without welding to the support plate 3. The bullseye is sealed by the fusion of the membrane and the net.

[0066] S3. Outer edge sealing: Apply epoxy resin evenly to a 20mm annular area inside the outer diameter of the diaphragm using a dispensing machine. Dispensing parameters: dispensing amount 0.1g / s, dispensing speed 20mm / s, adhesive line width 3mm. After dispensing, press with a cylinder at a pressure of 2MPa for 60s to allow the adhesive to initially cure. After completing the single-sided sealing, flip the workpiece to complete the bullseye welding and outer edge bonding on the other side.

[0067] S4. Post-treatment curing: Place the pre-cured membrane element in a hydraulic press and hold it under 1MPa pressure for 12 hours to allow the epoxy resin to fully cure and obtain the finished product.

[0068] Example 3: Fabrication of fiberglass support plate film element by electromagnetic induction eddy current welding process (co-welding of three components + outer edge adhesive bonding)

[0069] The components of the membrane element in this embodiment are as follows:

[0070] Membrane 1: Made of polyvinylidene fluoride (PVDF), with an outer diameter of 800 mm and a bullseye flow port corresponding to a through-hole diameter of 100 mm.

[0071] Flow guide net 2: made of polypropylene (PP), with an outer diameter of 800mm and through hole size the same as diaphragm 1.

[0072] Support plate 3: It is a non-metallic polypropylene fiberglass hybrid plate (PP+GF30) with an outer diameter of 900mm and a bullseye guide port diameter of 100mm, which is consistent with the through hole diameter of diaphragm 1 and guide net 2.

[0073] This embodiment uses electromagnetic induction eddy current welding process, and the steps are as follows:

[0074] S1. Cutting and material preparation: Cut polyvinylidene fluoride membrane and polypropylene guide net to the specified size; process the center water outlet 5 and bullseye guide port 4 of polypropylene fiberglass support plate; position the workpiece in the electromagnetic induction welding mold, lay the front guide net 2 and membrane 1 and align the holes.

[0075] S2. Sealing welding at the bullseye: Electromagnetic induction eddy current welding process is used to weld the area around the bullseye. Welding parameters: power 8KW, heating temperature 290℃, welding time 30s / piece, pressure holding and cooling time 20s / piece, pressure 0.6MPa, cooling and standing for 60s; the support plate 3 is non-metallic and has a uniform aperture. After welding, the diaphragm 1, the guide net 2 and the support plate 3 are fused and sealed.

[0076] S3. Outer edge sealing: Apply polyurethane adhesive to a 30mm annular area inside the outer diameter of the diaphragm using a dispensing machine. The dispensing amount is 0.12g / s, the dispensing speed is 15mm / s, and the adhesive line width is 4mm. Press the adhesive with a hydraulic press at a pressure of 3MPa and a holding time of 90s for initial curing. Flip the workpiece to complete the welding and bonding on the other side.

[0077] S4. Post-treatment curing: The membrane element is held under pressure of 1.5MPa for 18 hours to allow the adhesive to fully cure and obtain the finished product.

[0078] Example 4: Fabrication of titanium plate support plate membrane element by electromagnetic induction eddy current welding process (membrane mesh co-welding + outer edge adhesive bonding)

[0079] The components of the membrane element in this embodiment are as follows:

[0080] Membrane 1: Made of polyacrylonitrile (PAN), with an outer diameter of 1000mm and a bullseye flow port corresponding to a through-hole diameter of 130mm.

[0081] Flow guide net 2: made of polypropylene (PP), with an outer diameter of 1000mm and through-hole size the same as the diaphragm.

[0082] Support plate 3: is a titanium plate (TA2) with an outer diameter of 1150mm. Bullseye guide port 4 has a diameter of 180mm, which is 50mm larger than the diameter of the through hole of diaphragm 1.

[0083] This embodiment uses electromagnetic induction eddy current welding process, and the steps are as follows:

[0084] S1. Cutting and material preparation: Cut the PAN membrane and PP guide net to the required size; CNC machine the center water outlet 5 and bullseye guide port 4 of the titanium plate; After the mold is positioned, lay out the front guide net and membrane;

[0085] S2. Sealing welding at the bullseye: Electromagnetic induction eddy current welding is adopted. Parameters: power 15KW, heating temperature 285℃, welding time 60s / piece, pressure holding and cooling time 40s / piece, pressure 1.0MPa, cooling and standing for 120s; Since the titanium plate is metal and has a larger aperture, only the diaphragm 1 and the guide net 2 are fused and sealed, and it is not welded to the support plate 3.

[0086] S3. Outer edge sealing: Apply silicone to the annular area 40mm inside the outer diameter of the diaphragm, with a dispensing amount of 0.15g / s, a speed of 10mm / s, and a glue line width of 5mm; press with a hydraulic press at a pressure of 4MPa, and hold the pressure for 120s for initial curing; flip to complete the other side.

[0087] S4. Post-treatment curing: Hold at 2MPa pressure for 24 hours to fully cure and obtain the finished product.

[0088] Example 5: Preparation of ABS support plate film element by hot plate welding process (co-welding of three components + hot melting of outer edge)

[0089] The components of the membrane element in this embodiment are as follows:

[0090] Membrane 1: Made of cellulose acetate (CA), with an outer diameter of 400 mm and a corresponding through-hole diameter of 80 mm for the bullseye flow port.

[0091] Flow guide net 2: made of polypropylene (PP), with an outer diameter of 400mm and through hole size the same as diaphragm 1.

[0092] Support plate 3: It is a non-metallic ABS plate with an outer diameter of 480mm and a bullseye guide port diameter of 80mm, which is consistent with the through hole of diaphragm 1.

[0093] This embodiment uses a hot plate welding process for preparation, and the steps are as follows:

[0094] S1. Cutting and material preparation: Cut cellulose acetate film and polypropylene guide net to the required size; process the holes in the ABS support plate; position and place the workpiece in the mold;

[0095] S2. Sealing welding at the bullseye: Hot plate welding process is adopted. The hot plate is preheated to 280℃. Welding parameters: power 15KW, welding time 20s / piece, pressure holding and cooling time 15s / piece, pressure 0.7MPa, cooling and standing for 60s; the support plate 3 is non-metallic and has the same aperture. The diaphragm 1, the guide net 2, and the support plate 3 are fused and sealed.

[0096] S3, outer edge sealing: The hot plate welding process is also used to weld the annular area 15mm inside the outer diameter of the diaphragm, with the same parameters as bullseye welding, so that the three parts of the outer edge are fused together and sealed; flip the workpiece to complete the welding on the other side.

[0097] S4. Post-treatment curing: Hold at 0.8MPa pressure for 6 hours, then cool and set to obtain the finished product.

[0098] Example 6: Preparation of nylon support plate membrane element by adhesive bonding method (double-sided adhesive bonding)

[0099] The components of the membrane element in this embodiment are as follows:

[0100] Membrane 1: The material is polyethersulfone (PES), the outer diameter is 300mm, and the diameter of the through hole corresponding to the bullseye flow port is 20mm.

[0101] Guide net 2: Made of polyester (PET), with an outer diameter of 300mm and through hole size the same as diaphragm 1.

[0102] Support plate 3: is a non-metallic nylon plate (PA66) with an outer diameter of 360mm and a bullseye guide port diameter of 20mm.

[0103] This embodiment uses an adhesive manufacturing method, and the steps are as follows:

[0104] T1. Single-sided bonding and sealing: Place the nylon support plate face up on the dispensing equipment workbench, and apply acrylic glue to the annular area around the bullseye guide orifice and the annular area 15mm inside the outer diameter of the diaphragm. Dispensing parameters: dispensing amount 0.08g / s, dispensing speed 25mm / s, glue line width 2mm; after dispensing, place a polyester guide net and a polyethersulfone diaphragm in sequence, align the holes, and press them together with a cylinder at a pressure of 1.5MPa for 30s to initially solidify the three parts together.

[0105] T2, Sealing the other side: Flip the support plate over so that the back is facing up, and repeat the dispensing, mesh laying, film laying, and pressing operations of step T1 to complete the initial bonding and solidification of the other side, and obtain the initial formed film element.

[0106] T3. Post-treatment curing: Place the pre-formed membrane element in a hydraulic press and hold it under 1MPa pressure for 10 hours to allow the acrylic adhesive to fully cure and obtain the finished membrane element.

[0107] Example 7: Preparation of alloy support plate membrane element by hot plate welding process (membrane mesh co-welding + outer edge adhesive bonding)

[0108] The components of the membrane element in this embodiment are as follows:

[0109] Membrane 1: Made of polysulfone (PS), with an outer diameter of 1200mm and a bullseye flow port corresponding to a through-hole diameter of 220mm.

[0110] Flow guide net 2: made of polypropylene (PP), with an outer diameter of 1200mm and through hole size the same as diaphragm 1.

[0111] Support plate 3: It is a metal Hastelloy plate with an outer diameter of 1350mm and a bullseye guide port diameter of 280mm, which is 60mm larger than the diaphragm through hole.

[0112] This embodiment uses a hot plate welding process for preparation, and the steps are as follows:

[0113] S1. Cutting and material preparation: Cut the PS membrane and PP guide net to the required size; laser process the center water outlet 5 and bullseye guide port 4 of the alloy support plate; position and lay the front guide net 2 and membrane 1 in the mold;

[0114] S2. Sealing welding at the bullseye: Hot plate welding is used. The hot plate preheating temperature is 290℃. Welding parameters: power 25KW, welding time 120s / piece, pressure holding and cooling time 80s / piece, pressure 1.2MPa, cooling and standing for 300s; the alloy support plate is metal and has a larger aperture. Only the diaphragm 1 and the guide net 2 are fused together to form a seal.

[0115] S3. Outer edge sealing: Apply epoxy resin adhesive in a 50mm annular area inside the outer diameter of the diaphragm, with an application rate of 0.18g / s, a speed of 8mm / s, and an adhesive line width of 6mm; press with a hydraulic press at a pressure of 5MPa, hold the pressure for 150s for initial curing; flip to complete the other side.

[0116] S4. Post-treatment curing: Hold the adhesive under 3MPa pressure for 30 hours to fully cure and obtain the finished product.

[0117] The working principle of this invention is as follows: The membrane element described in this invention is the core unit for material separation in a vibrating membrane device. Multiple membrane elements are stacked and assembled to form a membrane module. During operation, the feed liquid to be treated enters the feed channel of the membrane module. Under the high-frequency vibration of the vibrating membrane device, the feed liquid forms a strong turbulent shear force on the membrane surface, effectively destroying the concentration polarization layer and filter cake layer on the membrane surface. This allows small molecule solutes or solvents in the feed liquid to pass through the membrane and enter the permeate side, while large molecule solutes, suspended solids, etc., are retained, thereby achieving material separation and concentration. After the permeate passes through the membrane, it enters the flow guide net, which provides a flow channel for the permeate, guiding it to converge towards the central outlet hole 5, and finally flowing out of the membrane module through the central outlet hole 5, completing the separation process.

[0118] This invention achieves a double seal at four points of the bullseye guide opening and at the outer edge through hot-melt welding or adhesive bonding:

[0119] The bullseye inlet 4 is sealed using two methods: hot-melt welding, which melts the polymer materials of the diaphragm 1 and the guide net 2 with heat, and after cooling, forms a strong molecular bond with the support plate 3 (metal or non-metal); and adhesive bonding, which uses glue to tightly connect the three components. Both methods form a continuous and uniform sealing layer, effectively preventing leakage of the liquid from the bullseye inlet 4 and ensuring that all permeate flows out after being collected through the guide net 2.

[0120] Outer edge sealing: Similarly, hot-melt welding or adhesive bonding is used to form an annular sealing strip on the outer edge of the membrane element, which completely seals the edges of the membrane 1, the flow guide net 2 and the support plate 3, preventing the liquid from leaking from the side of the membrane element, ensuring that the liquid can only permeate and separate through the membrane 1, avoiding the generation of short-circuit flow and ensuring the separation effect.

[0121] The integrated sealing structure can withstand the high-frequency vibration of the vibrating membrane equipment and the pressure impact of the feed liquid. It will not loosen or fail during long-term use, which significantly improves the operational stability and service life of the membrane element.

[0122] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0123] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A membrane element for a vibrating diaphragm device, characterized in that, include: The system comprises a support plate, a guide net, and a diaphragm. Two guide nets and two diaphragms are provided, with the two guide nets respectively attached to the front and back sides of the support plate. The two diaphragms are respectively attached to the outer sides of the two guide nets. A central water outlet is provided at the center of the support plate. Two sets of bullseye guide ports are provided on the support plate, symmetrically arranged on both sides of the central water outlet. Both the guide net and the diaphragm have through holes matching the bullseye guide ports and water passage holes matching the central water outlet. The diaphragm and the guide net at the bullseye inlet are sealed together by hot-melt welding or adhesive bonding, and the outer edges of the diaphragm, the guide net and the support plate are sealed by hot-melt welding or adhesive bonding.

2. The membrane element for a vibrating diaphragm device according to claim 1, characterized in that, The diaphragm is made of any one of polyethersulfone, polyamide, polysulfone, polyvinylidene fluoride, polytetrafluoroethylene, piperazine, cellulose acetate, polyimide, polyetheretherketone, or polyacrylonitrile; the guide net is made of any one of polypropylene, polyester, polytetrafluoroethylene, or polyvinylidene fluoride; the support plate is a metal support plate or a non-metal support plate. The metal support plate is made of any one of stainless steel, titanium, or other alloy materials. The non-metal support plate is made of any one of polypropylene, polypropylene-glass fiber composite, polyester, polyester-glass fiber composite, polyethylene, polyethylene-glass fiber composite, nylon, polyoxymethylene resin, polytetrafluoroethylene, or ABS.

3. The membrane element for a vibrating diaphragm device according to claim 1, characterized in that, The outer diameter of the diaphragm and the guide net is 100-1900 mm, the outer diameter of the support plate is 150-2000 mm, and the diameter of the bullseye guide port is 5-300 mm.

4. The membrane element for a vibrating diaphragm device according to claim 1, characterized in that, The hot melt welding is one of ultrasonic welding, electromagnetic induction eddy current welding, or hot plate welding.

5. A membrane element for a vibrating diaphragm device according to claim 1, characterized in that, The adhesive used for bonding is any one of silicone, acrylic, epoxy resin, or polyurethane adhesive.

6. A method for preparing a membrane element for a vibrating membrane device, comprising a membrane element for a vibrating membrane device as described in any one of claims 1-5, characterized in that, It is produced by hot-melt manufacturing or adhesive manufacturing.

7. The method for preparing a membrane element for a vibrating diaphragm device according to claim 6, characterized in that, The hot-melt manufacturing method includes the following steps: S1. Cutting and preparing materials: Cut the diaphragm and guide net to the corresponding size, process the bullseye guide hole in the support plate, and place the cut circular diaphragm and guide net on the front and back sides of the support plate respectively, and position them on the mold of the hot melt welding equipment. S2. Sealing welding at the bull's eye: The periphery of the bull's eye guide is welded by hot melt welding process, so that the diaphragm and guide mesh form a seal at the bull's eye guide. When the support plate is made of metal or non-metal materials, and the diameter of the bullseye guide hole on the support plate is 10 to 100 mm larger than the diameter of the through hole on the diaphragm and the guide net, the diaphragm and the guide net are heat-fused together and not welded to the support plate. When the support plate is made of non-metallic material, and the diameter of the bullseye guide hole on the support plate is basically the same as the diameter of the through hole on the diaphragm and the guide net, the diaphragm, the guide net and the support plate are welded together as one piece. S3. Outer edge sealing: Apply a ring of adhesive to the annular area 1-100mm inside the outer diameter of the diaphragm, press the outer edge of the diaphragm tightly with the support plate and allow it to cure initially. When the support plate is made of non-metallic material, a hot-melt welding process can be used to hot-melt seal the annular area of ​​1 to 100 mm inside the outer diameter of the diaphragm to the support plate. S4. Post-treatment curing: Post-treatment is performed on the pre-cured membrane element to ensure complete curing and obtain the finished product.

8. The method for preparing a membrane element for a vibrating diaphragm device according to claim 7, characterized in that, The adhesive manufacturing method includes the following steps: T1. Single-sided bonding and sealing: Place the support plate with one side facing up on the dispensing equipment, apply glue around the bullseye guide orifice and in the annular area of ​​1-100mm inside the outer diameter of the diaphragm, place a guide net and a diaphragm in sequence and press them together to initially solidify the three into one. T2, Sealing the other side: Flip the support plate so that the other side faces up, repeat the operation of step T1, place another guide net and another membrane in sequence and press them to initially solidify, to obtain the initially formed membrane element; When the support plate is made of non-metallic material, the outer edge seal can be replaced by a hot melt welding process, which heat melts and welds the annular area of ​​1 to 100 mm inside the outer diameter of the diaphragm to the support plate. T3. Post-processing and curing: Post-processing is performed on the initially formed membrane element to ensure complete curing and obtain the finished product.

9. A method for preparing a membrane element for a vibrating diaphragm device according to claim 8, characterized in that, The pressing operation in steps S3, T1 and T2 uses a hydraulic press or cylinder with a pressure of 0.1 to 25 MPa and a holding time of 1 to 200 s; the dispensing operation uses a dispensing machine with a dispensing amount of 0.05 to 0.2 g / s, a dispensing speed of 1 to 50 mm / s and a glue line width of 0.5 to 10 mm. In step S2, the hot melt welding process is an ultrasonic welding process, an electromagnetic induction eddy current welding process, or a hot plate welding process. The parameters for ultrasonic welding are: frequency 15-25KHz, power 1-30KW, welding time 0.2-10s / point, and pressure 0.05-2.5MPa. The parameters for electromagnetic induction eddy current welding are: power 1-80KW, heating temperature 150-400℃, welding time 1-600s / piece, pressure holding and cooling time 1-300s / piece, pressure 0.1-2.5Mpa, and cooling and settling time 1-600s. The parameters for hot plate welding are as follows: power 1-100KW, preheating temperature of hot plate 150-400℃, welding time 1-600s / piece, pressure holding and cooling time 1-300s / piece, pressure 0.1-2.5Mpa, and cooling and settling time 1-600s.

10. A method for preparing a membrane element for a vibrating diaphragm device according to claim 8, characterized in that, The post-processing operations described in steps S4 and T3 involve pressing the membrane element with a hydraulic press or cylinder for 1 to 36 hours at a pressure of 0.1 to 25 MPa.

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