A method for preparing a glass fiber layer for a reverse osmosis membrane element

Abstract

The present invention relates to the field of reverse osmosis technology and discloses a method for preparing a glass fiber layer of a reverse osmosis membrane element. The method is carried out in a winding device for a reverse osmosis membrane element, comprising: impregnating a glass fiber mesh cloth in a sealant to obtain a glass fiber mesh cloth I, and winding the glass fiber mesh cloth I so that the glass fiber mesh cloth I is wound on the surface of the reverse osmosis membrane element; the mesh size of the glass fiber mesh cloth is not greater than 100 mm. 2 , weight not more than 500g / m 2 The wire diameter is no greater than 3mm; the winding process conditions include at least 4-7 turns, a winding speed of 5-20rpm, and a temperature of 10-30°C. This invention utilizes a glass fiber mesh with specific parameters, which is impregnated in a wide-width adhesive tank and then continuously wound around the outer layer of the reverse osmosis membrane element. This method features simple operation, shortened processing cycles, high efficiency, and controllable quality.

Description

Technical Field

[0001] The present invention relates to the technical field of reverse osmosis, and in particular to a method for preparing a glass fiber layer of a reverse osmosis membrane element. Background Art

[0002] Reverse osmosis membranes are widely used in pure water preparation, sewage treatment, seawater desalination, material separation and concentration due to their advantages of low energy consumption, no phase change and small size.

[0003] Reverse osmosis membrane elements are the core components of reverse osmosis systems. Most commercial reverse osmosis membrane elements are spiral-wound, consisting of a reverse osmosis membrane sheet, a pure water guide mesh, and a raw water guide mesh wound around a water collection pipe. The pore size of reverse osmosis membrane elements is as small as nanometers. Under a certain pressure, water molecules can pass through the RO membrane, while impurities such as inorganic salts, heavy metal ions, organic matter, colloids, bacteria, and viruses in the raw water cannot pass through the membrane. This ensures a strict separation between the pure water that can pass through and the concentrated water that cannot.

[0004] Reverse osmosis membrane elements must be placed in a membrane housing for use and must withstand significant pressure during operation. Therefore, the elements require strong impact resistance and a uniform outer diameter. Existing reverse osmosis membrane production often involves dipping multiple glass fiber strands in a resin, then spirally wrapping them around the membrane element. After curing, they form an impact-resistant and drop-resistant outer shell. This traditional processing method is inefficient, requires a long processing cycle, and produces a poorly flat reverse osmosis membrane surface, prone to the appearance of raised spots and fuzz. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems of low processing efficiency, long cycle and poor surface flatness in the process of preparing the glass fiber layer of the reverse osmosis membrane in the prior art.

[0006] In order to achieve the above object, the present invention provides a method for preparing a glass fiber layer of a reverse osmosis membrane element, the method being carried out in a winding device for a reverse osmosis membrane element, the winding device comprising:

[0007] A bottom plate, on which a support rod is fixedly arranged;

[0008] An impregnation assembly, comprising a plastic box for containing sealant and a pressure roller arranged inside the plastic box, wherein the plastic box is fixedly arranged on the bottom plate, and the impregnation assembly is used to impregnate the glass fiber mesh with the sealant;

[0009] A rotating mechanism, the rotating mechanism being disposed on the support rod and being used to rotate the reverse osmosis membrane element, the rotating mechanism comprising a first rotating shaft assembly and a second rotating shaft assembly, one end of the reverse osmosis membrane element being sleeved on the first rotating shaft assembly and the other end being engaged with the second rotating shaft assembly, wherein under the rotation of the first rotating shaft assembly and the second rotating shaft assembly, the glass fiber mesh cloth impregnated with sealant is wound around the surface of the reverse osmosis membrane element;

[0010] A clamping mechanism, the clamping mechanism is used to clamp the impregnated glass fiber mesh cloth and place it on the reverse osmosis membrane element, including a base and a third drive motor provided on the base, the base is provided on the support rod, the output shaft of the third drive motor is connected to a screw nut assembly, the screw nut assembly is connected to a connecting rod assembly, the front end of the connecting rod assembly is connected to a clamping hand, and the clamping hand is opened and closed under the drive of the connecting rod assembly;

[0011] The method comprises: impregnating a glass fiber mesh cloth in a sealant to obtain a glass fiber mesh cloth I, and winding the glass fiber mesh cloth I so that the glass fiber mesh cloth I is wound on the surface of the reverse osmosis membrane element; the sealant is a two-component epoxy resin adhesive having a viscosity of 800-5000 mPa·s at 25° C. and a curing shrinkage rate of no more than 0.4%;

[0012] The mesh size of the glass fiber mesh is not greater than 100mm 2 , weight not more than 500g / m 2 , the diameter of the mesh wire is not greater than 3mm; the conditions of the winding process include at least: the number of winding turns is 4-7 turns, the winding speed is 5-20rpm, and the temperature is 10-30℃.

[0013] The present invention adopts glass fiber mesh cloth with specific parameters and types, which is continuously wound on the outer layer of the reverse osmosis membrane element after being soaked in a wide-width glue tank. It has the characteristics of simple operation, shortened processing cycle, high efficiency and controllable quality. Specifically, the surface flatness of the reverse osmosis membrane glass fiber layer prepared by the method of the present invention is high, the protrusions and hairs are greatly reduced, and it also has the advantages of high impact strength and hardness.

[0014] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 2. It is a schematic structural diagram of a winding device for a reverse osmosis membrane element according to the present invention;

[0016] Figure 2 is a schematic structural diagram of a clamping mechanism in a winding device for a reverse osmosis membrane element according to the present invention;

[0017] Figure 3 It is a schematic structural diagram of a stirring mechanism in a winding device for a reverse osmosis membrane element according to the present invention.

[0018] Description of Reference Numerals

[0019] DETAILED DESCRIPTION

[0020] The endpoints of the ranges and any values ​​disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoints of each range, the endpoints of each range and individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered to be specifically disclosed herein.

[0021] In the present invention, unless otherwise specified, the room temperature or normal temperature refers to 25±2°C.

[0022] As mentioned above, the present invention provides a method for preparing a glass fiber layer of a reverse osmosis membrane element, which is carried out in a winding device for a reverse osmosis membrane element, such as Figure 1 、 Figure 2 and Figure 3 As shown, the winding device includes:

[0023] A base plate 100 , on which a support rod 200 is fixedly provided;

[0024] The impregnation assembly 300 includes a plastic box 301 for containing sealant and a pressure roller 302 disposed inside the plastic box 301. The plastic box 301 is fixedly disposed on the bottom plate 100. The impregnation assembly 300 is used to impregnate the glass fiber mesh cloth B with sealant.

[0025] A rotating mechanism 400 is provided on the support rod 200 and is used to rotate the reverse osmosis membrane element A. The rotating mechanism 400 includes a first rotating shaft assembly 401 and a second rotating shaft assembly 402. One end of the reverse osmosis membrane element A is sleeved on the first rotating shaft assembly 401, and the other end is engaged with the second rotating shaft assembly 402. Under the rotation of the first rotating shaft assembly 401 and the second rotating shaft assembly 402, the glass fiber mesh cloth B impregnated with sealant is wrapped around the surface of the reverse osmosis membrane element A.

[0026] A clamping mechanism 500 is used to clamp the soaked glass fiber mesh cloth B and place it on the reverse osmosis membrane element A. The clamping mechanism 500 includes a base 501 and a third drive motor 502 provided on the base 501. The base 501 is provided on the support rod 200. A screw nut assembly 503 is connected to the output shaft of the third drive motor 502. The screw nut assembly 503 is connected to a connecting rod assembly 504. A gripper 505 is connected to the front end of the connecting rod assembly 504. The gripper 505 is opened and closed under the drive of the connecting rod assembly 504.

[0027] The method comprises: impregnating a glass fiber mesh cloth in a sealant to obtain a glass fiber mesh cloth I, and winding the glass fiber mesh cloth I so that the glass fiber mesh cloth I is wound on the surface of the reverse osmosis membrane element; the sealant is a two-component epoxy resin adhesive having a viscosity of 300-10000 mPa·s at 25° C. after mixing and a curing shrinkage rate of no more than 2%;

[0028] The mesh size of the glass fiber mesh is not greater than 100mm 2 , weight not more than 500g / m 2 , the diameter of the mesh wire is not greater than 3mm; the conditions of the winding process include at least: the number of winding turns is 4-7 turns, the winding speed is 5-20rpm, and the temperature is 10-30℃.

[0029] In the above-mentioned winding device, after the glass fiber mesh cloth B is impregnated with sealant in the glue box 301 through the impregnation component 300, one end of the glass fiber mesh cloth B impregnated with sealant is placed on the surface of the reverse osmosis membrane element A through the clamping hand 505 of the clamping mechanism 500, and then, with the cooperation of the rotating mechanism 400, the glass fiber mesh cloth B impregnated with sealant is continuously wound on the surface of the reverse osmosis membrane element A, which has the characteristics of simple operation, high efficiency and controllable quality.

[0030] It should be noted that one end of the glass fiber mesh cloth B is extended into the plastic box 301 to be soaked in sealant, and the glass fiber mesh cloth B is clamped out of the plastic box 301 by the clamping hand 505 of the clamping mechanism 500. The clamping hand 505 of the clamping mechanism 500 is always in a clamping state until the glass fiber mesh cloth B soaked in sealant is placed on the surface of the reverse osmosis membrane element A. The clamping hand 505 is opened, and at the same time, under the action of the pressure roller 302, the wide glass fiber mesh cloth B can be soaked and wound at the same time.

[0031] Preferably, the mesh size of the glass fiber mesh is 10-30 mm. 2 , weight is 200-300g / m 2The diameter of the mesh wire is 1-1.5 mm. The inventors found during the research process that the surface smoothness of the glass fiber layer of the reverse osmosis membrane obtained by adopting the specific embodiment under this preferred case is better, and it also has better impact resistance and hardness.

[0032] According to a particularly preferred embodiment of the present invention, the two-component epoxy resin adhesive is selected from at least one of Fuller FE7258C, Huitian 6321G, Huili 5011-11, and Jinglu JLEP-708. The inventors have discovered that this preferred embodiment can produce a fiberglass layer of a permeable membrane with superior overall performance.

[0033] Preferably, the method further comprises: curing the reverse osmosis membrane element wound with the glass fiber mesh cloth I.

[0034] Preferably, the curing treatment conditions at least include: a temperature of 10-30° C. and a time of 24-48 hours.

[0035] According to a particularly preferred embodiment of the present invention, the reverse osmosis membrane element has a length of 0.5-1.5 m and a diameter of 0.06-0.3 m.

[0036] Preferably, the first rotating shaft assembly 401 includes a first rotating shaft 4011 and a first driving motor 4012 for driving the first rotating shaft 4011 to rotate, the first rotating shaft 4011 is used to sleeve the reverse osmosis membrane element A and drive the reverse osmosis membrane element A to rotate, and one end of the first rotating shaft 4011 is set on the support rod 200, and the other end extends in a direction away from the support rod 200.

[0037] Preferably, the second rotating shaft assembly 402 includes a second rotating shaft 4021 engaged with the reverse osmosis membrane element A and an adjusting assembly for enabling the second rotating shaft 4021 to move left and right.

[0038] More preferably, the adjustment assembly includes a first sliding rod 4022 fixedly provided on the support rod 200, a first slider 4023 sleeved on the first sliding rod 4022, and a second drive motor 4024 driving the first slider 4023 to move left and right along the first sliding rod 4022. The second rotating shaft 4021 is fixedly provided on the first slider 4023. Under the action of the second drive motor 4024, the second rotating shaft 4021 is moved away from or close to the reverse osmosis membrane element A.

[0039] It should be noted that the second driving motor 4024 drives the first sliding block 4023 to move linearly on the first sliding rod 4022, and under the action of the second driving motor 4024, when the first sliding block 4023 moves along the first sliding rod 4022 towards the support rod 200, the second rotating shaft 4021 approaches the clamping end of the reverse osmosis membrane element A, until the second rotating shaft 4021 is clamped with the reverse osmosis membrane element A, and the second driving motor 4024 stops running; on the contrary, when the first sliding block 4023 moves along the first sliding rod 4022 away from the support rod 200, the clamping end of the second rotating shaft 4021 and the reverse osmosis membrane element A is opened, and under the continuous action of the second driving motor 4024, the second rotating shaft 4021 and the reverse osmosis membrane element A are away from the preset position, and then the second driving motor 4024 stops running.

[0040] In the application, one end of the reverse osmosis membrane element A is sleeved on the first rotating shaft 4011, the other end is clamped with the second rotating shaft 4021, then under the action of the first driving motor 4012, the first rotating shaft 4011 rotates, so that the reverse osmosis membrane element A sleeved on the first rotating shaft 4011 rotates together, so that the glass fiber mesh cloth B is continuously wound on the surface of the reverse osmosis membrane element A, forming an impact-resistant and hard shell, which plays a protective role for the reverse osmosis membrane element A.

[0041] Preferably, the support rod 200 is further provided with a sliding rail (not shown in the drawings), the base 501 is slidingly arranged on the sliding rail, and the base 501 is further provided with a fifth driving motor (not shown in the drawings) to drive the base 501 to move reciprocatingly along the support rod 200 in the vertical direction.

[0042] Preferably, the screw rod 5031 nut assembly 503 includes a screw rod 5031 and a sliding nut 5032 screwed on the screw rod 5031, and the base 501 is provided with a sliding groove, and the bottom of the sliding nut 5032 is provided with a second sliding block matched with the sliding groove.

[0043] Preferably, the connecting rod assembly 504 includes a first connecting rod 5041, a second connecting rod 5042 and a third connecting rod 5043, one end of the first connecting rod 5041 is fixed to the base 501, the other end of the first connecting rod 5041 is hinged to the middle segment of the second connecting rod 5042, the second connecting rod 5042 is provided with two parallel to each other, one end of the second connecting rod 5042 is fixed to one side of the sliding nut 5032, the other end of the second connecting rod 5042 is hinged to one end of the third connecting rod 5043, and the other end of the third connecting rod 5043 is connected with the clamping hand 505.

[0044] In the present invention, the third drive motor 502 drives the screw rod 5031 to rotate, and the rotation of the screw rod 5031 is converted into the forward and backward sliding of the sliding nut 5032 through the internal thread of the sliding nut 5032 and the external thread of the screw rod 5031. The forward and backward sliding of the sliding nut 5032 drives one end of the first connecting rod 5041 to move. The other end of the first connecting rod 5041 is respectively connected to the middle part of the second connecting rod 5042, converting the movement of the second connecting rod 5042 into the opening and closing movement of the third connecting rod 5043. The opening and closing of the third connecting rod 5043 drives the clamping hand 50 5 opens and closes to complete the clamping and releasing actions; at the same time, the fifth drive motor drives the base 501 to move back and forth in the vertical direction along the support rod 200 on the slide rail. When the clamping hand 505 clamps the glass fiber mesh cloth B, the fifth drive motor drives the base 501 to move upward along the support rod 200 so that one end of the glass fiber mesh cloth B is placed on the surface of the reverse osmosis membrane element A; when the clamping hand 505 releases the glass fiber mesh cloth B, the fifth drive motor drives the base 501 to move downward along the support rod 200.

[0045] In the present invention, the gripper 505 includes a left gripper and a right gripper, wherein the left gripper grips the left side of the glass fiber mesh cloth B, and the right gripper grips the right side of the same glass fiber mesh cloth B.

[0046] The clamping mechanism 500 of the present invention has the characteristics of simple structure and convenient control, and can meet the requirements of automated control, thereby significantly improving processing efficiency.

[0047] Preferably, the winding device also includes a stirring mechanism 303 arranged inside the plastic box 301, and the stirring mechanism 303 includes a fourth drive motor 3031, a stirring assembly, a mounting frame 3032 and a support seat 3033. One end of the mounting frame 3032 is fixedly set on the support rod 200, and the support seat 3033 is set on the mounting frame 3032. The stirring assembly passes through the bearing hole of the support seat 3033, and the fourth drive motor 3031 is connected to the stirring assembly.

[0048] The stirring mechanism 303 provided by the present invention adopts the fourth drive motor 3031 to drive the stirring component to force the sealant in the glue box 301 to circulate and stir, so as to achieve the purpose of improving the curing efficiency. When the stirring component is in motion, the support seat 3033 can not only support the stirring component, but also avoid radial movement, thereby ensuring the stability of the stirring movement.

[0049] In a specific embodiment of the present invention, the support seat 3033 may include a bearing seat connected to the mounting frame 3032 and a bearing body arranged on the bearing seat, and the stirring assembly is inserted into the bearing hole of the bearing body.

[0050] Preferably, the stirring assembly includes a transmission shaft 3034, a coupling 3035, and a stirring shaft 3036. The transmission shaft 3034 is connected to the fourth drive motor 3031, the stirring shaft 3036 passes through the bearing hole of the support base 3033, and the coupling 3035 connects the lower end of the transmission shaft 3034 and the upper end of the stirring shaft 3036. That is, the stirring assembly can be divided into two shafts by the coupling 3035. Compared with a single shaft, the length of the transmission shaft 3034 and the stirring shaft 3036 is significantly shortened, thereby facilitating the disassembly, maintenance, or replacement of the transmission shaft 3034 and the stirring shaft 3036.

[0051] More preferably, the stirring shaft 3036 includes a shaft body connected to the transmission shaft 3034 through the coupling 3035 and a first blade bracket 3037 arranged on the shaft body, and the first blade bracket 3037 includes a mounting ring 3038 sleeved on the shaft body and at least two stirring blades 3039 evenly spaced along the circumference of the mounting ring 3038 on the mounting ring 3038.

[0052] According to a particularly preferred embodiment of the present invention, the first blade support 3037 includes a mounting ring 3038 sleeved on the shaft body and at least two stirring blades 3039 evenly spaced along the circumference of the mounting ring 3038. The stirring blades 3039 can be detachably mounted on the mounting ring 3038, thereby facilitating replacement and maintenance of the stirring blades 3039. Furthermore, a first externally threaded section is formed on the shaft body, and an internal thread is formed on the inner side of the mounting ring 3038, which is threadably connected to the first externally threaded section on the shaft body, thereby facilitating assembly and disassembly of the mounting ring 3038 and adjustment of its position.

[0053] Preferably, the stirring shaft 3036 also includes a second blade support 3040, which is disposed on the free end of the shaft body. This second blade support 3040 can further circulate and stir the sealant in the plastic cartridge 301. Specifically, a second externally threaded section is formed on the free end of the shaft body, and an internal thread is formed on the inner side of the mounting ring 3038 of the second blade support 3040, which is threadably connected to the second externally threaded section. This facilitates assembly and disassembly of the second blade support 3040 and adjustment of its position.

[0054] Preferably, the winding device further includes a PLC controller (not shown in the drawings), and the PLC controller is communicatively connected to the rotating mechanism 400 and the clamping mechanism 500 respectively.

[0055] The present invention will be described in detail below through examples. In the following examples, the raw materials involved are all commercially available products.

[0056] Fiberglass mesh-1: mesh size is 16mm 2 , weight is 300g / m 2 , the diameter of the network cable is 1.0mm;

[0057] Fiberglass mesh-2: mesh size is 25mm 2 , weight is 200g / m 2 , the diameter of the network cable is 1.5mm;

[0058] Fiberglass mesh-3: mesh size 50mm 2 , weight is 130g / m 2 , the diameter of the network cable is 2mm;

[0059] Fiberglass mesh-4: mesh size is 110mm 2 , weight is 130g / m 2 , the diameter of the network cable is 4mm;

[0060] Epoxy resin adhesive-1: FE7258C, purchased from Fule (China) Adhesive Co., Ltd.;

[0061] Epoxy resin glue-2: 6321G, purchased from Huitian New Materials Co., Ltd.;

[0062] Epoxy resin glue-3: FE7004B, purchased from Fule (China) Adhesive Co., Ltd.

[0063] Example 1

[0064] This embodiment provides a method for preparing a glass fiber layer of a reverse osmosis membrane element. Figure 1 、 Figure 2 and Figure 3 The method is performed in a winding device for a reverse osmosis membrane element as shown, and comprises:

[0065] The fourth drive motor 3031 is turned on, driving the stirring assembly to continuously stir the epoxy resin in the plastic box 301 (300 rpm). First, one end of the reverse osmosis membrane element A to be wound is placed on the first rotating shaft 4011. The second drive motor 4024 is controlled by the PLC controller to drive the second rotating shaft 4021 toward the support rod 200, close to the engaging end of the reverse osmosis membrane element A, and engages with the reverse osmosis membrane element A. The second drive motor is then stopped.

[0066] Then, one end of the glass fiber mesh cloth B is inserted into the glue box 301 and infiltrated with epoxy resin glue. The PLC controller controls the clamping hands 505 to clamp the two ends of the glass fiber mesh cloth B infiltrated with epoxy resin glue until the fiber mesh cloth B is placed on the surface of the reverse osmosis membrane element A. After releasing the clamping hands 505, the fifth drive motor drives the base 501 to move downward along the support rod 200. Then, under the action of the PLC controller, the first drive motor is turned on to drive the first rotating shaft to rotate, thereby driving the reverse osmosis membrane element A to rotate. At the same time, under the action of the pressure roller, the glass fiber mesh cloth I is wound so that the glass fiber mesh cloth I is wound on the surface of the reverse osmosis membrane element.

[0067] The reverse osmosis membrane element wound with the glass fiber mesh cloth 1 is subjected to a curing treatment;

[0068] The glass fiber mesh cloth B is glass fiber mesh cloth-1; the epoxy resin glue is epoxy resin glue-1;

[0069] The conditions of the winding process are: the number of winding turns is 5 turns, the winding speed is 10 rpm, and the temperature is room temperature;

[0070] The curing conditions are as follows: room temperature and 48 hours.

[0071] Example 2

[0072] This embodiment refers to the method of embodiment 1. Figure 1 、 Figure 2 and Figure 3 The method is carried out in the winding device for reverse osmosis membrane elements shown in the figure, except that the glass fiber mesh cloth B is glass fiber mesh cloth-2, and the epoxy resin glue is epoxy resin glue-2;

[0073] The conditions of the winding process are: the number of winding turns is 4 turns, the winding speed is 5 rpm, and the temperature is room temperature;

[0074] The curing conditions are as follows: room temperature and 48 hours.

[0075] Example 3

[0076] This embodiment refers to the method of Example 1, except that the glass fiber mesh cloth B is glass fiber mesh cloth-3.

[0077] Comparative Example 1

[0078] This comparative example refers to the method of Example 1, except that the glass fiber mesh cloth B is glass fiber mesh cloth-4.

[0079] Comparative Example 2

[0080] The comparative example 1 was prepared according to the method of the example 1, except that the winding speed was 25 rpm in the winding process.

[0081] Comparative example 3

[0082] The comparative example 1 was prepared according to the method of the example 1, except that the winding speed was 25 rpm in the winding process.

[0083] Comparative example 4

[0084] The comparative example 1 was prepared according to the method of the example 1, except that the epoxy resin glue was epoxy resin glue-3.

[0085] Test example

[0086] The performance of the prepared reverse osmosis membrane glass fiber layer was tested, and the specific test results are shown in Table 1.

[0087] The test method of the processing cycle is as follows: from the completion of the installation of the reverse osmosis membrane element on the winding device to the end of the winding process;

[0088] The test method of the maximum deviation of the diameter is as follows: the outer diameter of the reverse osmosis membrane element is measured by using a vernier caliper (the division value is 0.02 mm), and the measurement method is as follows: first, select a position at a distance of about 10 mm from the water inlet end face of the reverse osmosis membrane element, measure the first data, rotate the vernier caliper by 60°, measure the second data, and rotate the vernier caliper by 60° in the same direction, measure the third data; then, the outer diameter of the position at a distance of about 10 mm from the water outlet end face is measured by using the same method; and the deviation from the nominal outer diameter of the reverse osmosis membrane element is calculated;

[0089] The test method of the impact strength is as follows: the reverse osmosis element glass fiber layer is cut into a sample with a length of 80 mm and a width of 10 mm by using an angle grinder, and the impact resistance test is performed according to GB / T 1043.1-2008;

[0090] The test method of the hardness is as follows: the hardness of the reverse osmosis element glass fiber layer is tested by using a Shore D hardness tester.

[0091] Table 1

[0092]

[0093] It can be seen from the above table that the glass fiber mesh cloth is directly immersed in the epoxy resin glue and wound on the outer layer of the reverse osmosis membrane element according to the method of the present application, the processing cycle is significantly shortened, the efficiency is high, the surface flatness of the reverse osmosis membrane glass fiber layer prepared by using the method of the present application is high, the number of surface protrusions and hairs is greatly reduced, and the impact strength and hardness are high.

[0094] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, various simple variations of the technical solution of the present invention may be made, including combining the various technical features in any other appropriate manner. These simple variations and combinations should also be regarded as disclosed in the present invention and fall within the scope of protection of the present invention.

Claims

1. A method for preparing a glass fiber layer of a reverse osmosis membrane element, characterized in that: The method is carried out in a winding device for a reverse osmosis membrane element, the winding device comprising: A bottom plate (100), wherein a support rod (200) is fixedly provided on the bottom plate (100); An impregnation assembly (300) comprises a plastic box (301) for containing sealant and a pressure roller (302) arranged inside the plastic box (301), wherein the plastic box (301) is fixedly arranged on the bottom plate (100), and the impregnation assembly (300) is used to impregnate the glass fiber mesh cloth (B) with the sealant; A rotating mechanism (400), the rotating mechanism (400) being arranged on the support rod (200) and being used for rotating the reverse osmosis membrane element (A), the rotating mechanism (400) comprising a first rotating shaft assembly (401) and a second rotating shaft assembly (402), one end of the reverse osmosis membrane element (A) being sleeved on the first rotating shaft assembly (401), and the other end being engaged with the second rotating shaft assembly (402), and under the rotation of the first rotating shaft assembly (401) and the second rotating shaft assembly (402), the glass fiber mesh cloth (B) soaked in sealant is wound around the surface of the reverse osmosis membrane element (A); A clamping mechanism (500), the clamping mechanism (500) is used to clamp the soaked glass fiber mesh cloth (B) and place it on the reverse osmosis membrane element (A), comprising a base (501) and a third drive motor (502) provided on the base (501), the base (501) being provided on the support rod (200), a screw nut assembly (503) being connected to the output shaft of the third drive motor (502), the screw nut assembly (503) being connected to a connecting rod assembly (504), a clamping hand (505) being connected to the front end of the connecting rod assembly (504), and the clamping hand (505) being opened and closed under the drive of the connecting rod assembly (504); The method comprises: impregnating a glass fiber mesh cloth in a sealant to obtain a glass fiber mesh cloth I, and winding the glass fiber mesh cloth I so that the glass fiber mesh cloth I is wound on the surface of the reverse osmosis membrane element; the sealant is a two-component epoxy resin adhesive having a viscosity of 300-10000 mPa·s at 25° C. after mixing and a curing shrinkage rate of no more than 2%; The mesh size of the glass fiber mesh is not greater than 100mm 2 , weight not more than 500g / m 2 , the diameter of the mesh wire is not greater than 3mm; the conditions of the winding process include at least: the number of winding turns is 4-7 turns, the winding speed is 5-20rpm, and the temperature is 10-30℃.

2. The method according to claim 1, wherein The mesh size of the glass fiber mesh is 10-30mm 2 , weight is 200-300g / m 2 , the diameter of the network cable is 1-1.5mm.

3. The method according to claim 1 or 2, wherein: The two-component epoxy resin glue is selected from at least one of Fuller FE7258C, Huitian 6321G, Huili 5011-11, and Jinglu JLEP-708.

4. The method according to claim 1 or 2, wherein: The method further comprises: curing the reverse osmosis membrane element wound with the glass fiber mesh cloth 1; and / or The curing treatment conditions at least include: a temperature of 10-30° C. and a time of 24-48 hours.

5. The method according to claim 1 or 2, wherein: The reverse osmosis membrane element has a length of 0.5-1.5 m and a diameter of 0.06-0.3 m.

6. The method according to claim 1 or 2, wherein: The first rotating shaft assembly (401) comprises a first rotating shaft (4011) and a first driving motor (4012) for driving the first rotating shaft (4011) to rotate, the first rotating shaft (4011) being used to sleeve the reverse osmosis membrane element (A) and drive the reverse osmosis membrane element (A) to rotate, and one end of the first rotating shaft (4011) is arranged on the support rod (200), and the other end extends in a direction away from the support rod (200); and / or The second rotating shaft assembly (402) comprises a second rotating shaft (4021) engaged with the reverse osmosis membrane element (A) and an adjusting assembly for enabling the second rotating shaft (4021) to move left and right; and / or The adjustment component includes a first sliding rod (4022) fixedly arranged on the support rod (200), a first slider (4023) sleeved on the first sliding rod (4022), and a second driving motor (4024) driving the first slider (4023) to move left and right along the first sliding rod (4022); the second rotating shaft (4021) is fixedly arranged on the first slider (4023); under the action of the second driving motor (4024), the second rotating shaft (4021) is moved away from or close to the reverse osmosis membrane element (A).

7. The method according to claim 1 or 2, wherein: The screw-nut assembly (503) comprises a screw (5031) and a sliding nut (5032) screwed onto the screw (5031); a sliding groove is provided on the base (501); and a second sliding block is provided at the bottom of the sliding nut (5032) to cooperate with the sliding groove; and / or The connecting rod assembly (504) includes a first connecting rod (5041), a second connecting rod (5042) and a third connecting rod (5043), one end of the first connecting rod (5041) is fixed to the base (501), the other end of the first connecting rod (5041) is hinged to the middle section of the second connecting rod (5042), two second connecting rods (5042) are provided and are parallel to each other, one end of the second connecting rod (5042) is fixed to one side of the sliding nut (5032), the other end of the second connecting rod (5042) is hinged to one end of the third connecting rod (5043), and the other end of the third connecting rod (5043) is connected to a clamping hand (505).

8. The method according to claim 1 or 2, wherein: The winding device further comprises a stirring mechanism (303) arranged inside the plastic box (301), the stirring mechanism (303) comprising a fourth drive motor (3031), a stirring component, a mounting frame (3032) and a support seat (3033), one end of the mounting frame (3032) being fixedly arranged on the support rod (200), the support seat (3033) being arranged on the mounting frame (3032), the stirring component passing through a bearing hole of the support seat (3033), and the fourth drive motor (3031) being connected to the stirring component.

9. The method according to claim 8, wherein The stirring assembly comprises a transmission shaft (3034), a coupling (3035) and a stirring shaft (3036), wherein the transmission shaft (3034) is connected to the fourth drive motor (3031), the stirring shaft (3036) passes through the bearing hole of the support seat (3033), and the coupling (3035) connects the lower end of the transmission shaft (3034) and the upper end of the stirring shaft (3036); and / or The stirring shaft (3036) includes a shaft body connected to the transmission shaft (3034) through the coupling (3035) and a first blade bracket (3037) arranged on the shaft body, and the first blade bracket (3037) includes a mounting ring (3038) sleeved on the shaft body and at least two stirring blades (3039) evenly spaced along the circumference of the mounting ring (3038) and arranged on the mounting ring (3038).

10. The method according to claim 1 or 2, wherein: The winding device further comprises a PLC controller, and the PLC controller is communicatively connected to the rotating mechanism (400) and the clamping mechanism (500) respectively.

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