Hollow fiber nanofiltration membrane core with replaceable filter element

Abstract

The utility model relates to the technical field of nanofiltration membrane components, and discloses a hollow fiber nanofiltration membrane core with a replaceable filter element, which comprises a plurality of membrane shells arranged in sequence, a central butt joint pipe, nanofiltration membrane cores positioned in the membrane shells, and a butt joint mounting device for butt joint mounting of the end parts of the two membrane shells, the butt-joint mounting device comprises fastening assemblies for fastening the two membrane shells, the fastening assemblies are arranged in a symmetrical structure, the bottoms of the two fastening assemblies are connected with a butt-joint mounting opening and closing assembly through connecting pieces, the nanofiltration membrane core is inserted and mounted in each membrane shell, and the central butt-joint pipe is mounted at the end part of the nanofiltration membrane core in the membrane shell. By arranging the butt-joint mounting device, the single nanofiltration membranes connected in series can be conveniently subjected to butt-joint mounting, and a plurality of components do not need to be disassembled in sequence when a single membrane core is replaced, so that the maintenance difficulty is greatly reduced, and a large amount of time and manpower are saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nanofiltration membrane module technical field, concretely is hollow fiber nanofiltration membrane core of replaceable filter core formula. BACKGROUND

[0002] Nanofiltration (NF) is a membrane separation technology between ultrafiltration (UF) and reverse osmosis (RO), mainly used for separating small relative molecular mass substances, such as inorganic salts, small molecular organic substances, etc. Its molecular weight cut-off is between 100-2000 Dalton, and the pore size is about 1 nanometer. Most nanofiltration membranes are composite membranes, and the surface separation layer is composed of polyelectrolyte, which has high rejection rate for inorganic salts and organic substances.

[0003] Hollow fiber nanofiltration membrane core utilizes the adsorption, diffusion and screening effect of membrane and the charge effect on the membrane surface. Under the driving of pressure difference, solute and solvent molecules in the solution flow through the nanofiltration membrane, allowing only water molecules, beneficial minerals and trace elements to pass through, and rejecting bacteria, colloids, suspended solids, macromolecular organic substances, etc., to achieve separation of different components.

[0004] In actual application, when replacing the nanofiltration membrane core, multiple nanofiltration membrane cores need to be installed in the membrane shell in series to improve the filtration effect. However, when replacing the membrane core in the traditional membrane shell, the single membrane core needs to be manually installed in the membrane shell one by one, and a center joint pipe needs to be installed between the two membrane core end portions. Once a single membrane core needs to be replaced, multiple components need to be disassembled one by one, and the membrane core and the center joint pipe are prone to shift when manually installing the membrane core, which may cause damage to the membrane core. This not only consumes a lot of time and labor, but also greatly increases the maintenance difficulty.

[0005] Therefore, we propose a replaceable filter core type hollow fiber nanofiltration membrane core to solve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model aims to provide a replaceable filter core type hollow fiber nanofiltration membrane core to solve the problem that the membrane shell needs to be manually disassembled one by one when replacing the membrane core, and the membrane core and the center joint pipe are prone to shift when manually installing the membrane core, which may cause damage to the membrane core. This not only consumes a lot of time and labor, but also greatly increases the maintenance difficulty.

[0007] To achieve the above purpose, the utility model provides the following technical scheme:

[0008] The replaceable filter core type hollow fiber nanofiltration membrane core comprises a plurality of membrane shells arranged in sequence, a center butt joint pipe, a nanofiltration membrane core located in the interior of the membrane shell and a butt joint installation device for butt joint installation of the end portions of the two membrane shells.

[0009] The nanofiltration membrane core is inserted and installed in the interior of each membrane shell, and the center butt joint pipe is installed at the end portion of the nanofiltration membrane core in the interior of the membrane shell.

[0010] Preferably, each fastening assembly comprises a fastening clamp for fastening the outer circumferential wall of the end portion of the butt joint of the membrane shell, one of the fastening clamps is provided with an anti-deviation through hole, the outer wall of the other fastening clamp located on one side of the anti-deviation through hole is provided with an anti-deviation correction plug, and the anti-deviation correction plug is inserted into the anti-deviation through hole.

[0011] Preferably, the connecting piece comprises a base, a driving connecting rod and a driven connecting rod, the base is connected to the bottom of the fastening clamp, the driving connecting rod is parallel to one side of the driven connecting rod, the driving connecting rod and the driven connecting rod are symmetrically arranged on the two outer walls of the base, and one end of the driving connecting rod and the driven connecting rod is rotatably connected to the base through a rotating shaft.

[0012] Preferably, the butt joint opening and closing assembly comprises a support base and a driving piece located in the interior of the support base, the driving piece comprises a driving gear, a driven gear, a rack and a shaft rod, the shaft rod is symmetrically arranged in the interior of the support base, the two ends of each shaft rod are connected to the support base through a bearing seat, the driven gear is sleeved on the outer circumferential wall of one end of each shaft rod, the outer wall of one side of the driving gear is connected with an operation shaft, the end of the operation shaft penetrates through the support base and extends to the outside of the support base, the rack is symmetrically arranged on the two sides of the driving gear, one of the racks is connected with the driven gear on one of the shaft rods, and the other rack is connected with the driven gear on the other shaft rod.

[0013] Preferably, one end of the driving connecting rod away from the base is fixedly connected with the end of the shaft rod close to the base, and the other end of the other driving connecting rod away from the base is fixedly connected with the end of the other shaft rod close to the base.

[0014] Preferably, the end of the operation shaft is connected with an external driving motor.

[0015] Compared with the prior art, the nanofiltration membrane core of the utility model has the advantages that

[0016] 1、The traditional membrane shell needs to disassemble multiple components in sequence when replacing the membrane core, and the application facilitates the replacement and butt joint installation of the single membrane shell in series through the butt joint installation device, so that the single membrane core can be replaced without disassembling multiple components in sequence, thereby greatly reducing the maintenance difficulty and saving a large amount of time and manpower.

[0017] 2、In the butt joint installation device of the application, the fastening assembly includes fastening clamps, one of the fastening clamps is provided with an anti-offset through hole, and the other fastening clamp is provided with an anti-offset correction plug rod, the anti-offset correction plug rod is inserted into the anti-offset through hole, the center butt joint pipe can be effectively prevented from being offset due to the offset of one of the membrane shells during the installation of the end portions of the two membrane shells, damage to the membrane core is avoided, and the replacement process is simplified.

[0018] 3、The butt joint installation opening and closing assembly of the butt joint installation device includes a support seat and a driving piece, the driving piece is provided with a driving gear, a driven gear, a rack and a shaft rod, the driving gear is rotated by operating the shaft, the rack is driven to move, and the shaft rod is rotated, the butt joint installation and opening and closing of the two membrane shells can be realized through the connection of the driving connecting rod and the driven connecting rod 423, and the operation is relatively convenient. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole three-dimensional structure schematic view of the utility model;

[0020] Figure 2 It is an isometric view of the butt joint installation device of the utility model;

[0021] Figure 3 It is a structure schematic view of the fastening assembly of the utility model;

[0022] Figure 4 It is a schematic view of the connecting piece and the driving piece of the utility model;

[0023] Figure 5 It is a three-dimensional structure schematic view of the driving piece of the utility model.

[0024] In the drawing: 1, membrane shell; 2, center butt joint pipe; 3, nanofiltration membrane core; 4, butt joint installation device; 41, fastening assembly; 411, fastening clamp; 4111, anti-offset through hole; 4112, anti-offset correction plug rod; 42, connecting piece; 421, base; 422, driving connecting rod; 423, driven connecting rod; 43, butt joint installation opening and closing assembly; 431, support seat; 432, driving gear; 4321, operating shaft; 433, driven gear; 434, rack; 435, shaft rod. DETAILED DESCRIPTION

[0025] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0026] Please refer to Figures 1-5 As shown in the drawings, the replaceable filter core type hollow fiber nanofiltration membrane core comprises a plurality of membrane shells 1 arranged in sequence, a center butt joint pipe 2, a nanofiltration membrane core 3 located inside the membrane shell 1, and a butt joint mounting device 4 for butt joint mounting of the end portions of the two membrane shells 1. The nanofiltration membrane core 3 is inserted and mounted inside each membrane shell 1, and the center butt joint pipe 2 is mounted at the end portion of the nanofiltration membrane core 3 located inside the membrane shell 1. The conventional membrane shell 1 is relatively long in length, and when it is installed, disassembled and replaced, it needs to be disassembled and replaced from the end portion at this time, which is inconvenient to use. The present application arranges and combines a plurality of membrane shells 1 in sequence, which facilitates the replacement of a single nanofiltration membrane core 3, and does not need to disassemble a plurality of components in sequence to replace the nanofiltration membrane core 3 as in the conventional way, greatly reducing the maintenance difficulty, saving a lot of time and manpower, simplifying the replacement process, and solving the problem of complicated operation of replacing the membrane core in the conventional way.

[0027] The docking installation device 4 comprises a fastening assembly 41 for fastening the two membrane shells 1, the fastening assembly 41 is arranged in a symmetrical structure, which facilitates the fastening and docking installation of the two membrane shells 1, saves labor, and prevents the two membrane shells 1 from deviating during subsequent manual docking installation, which causes damage to the other nanofiltration membrane element 3 due to the deviation of the center docking pipe 2 at the end of the nanofiltration membrane element 3. The bottom of the two fastening assemblies 41 is connected to the docking installation opening and closing assembly 43 through the connecting piece 42. Each fastening assembly 41 comprises a fastening clamp 411 for fastening the outer circumferential wall of the docking end of the membrane shell 1. One of the fastening clamps 411 is provided with a deviation prevention through hole 4111. The other fastening clamp 411 is provided with a deviation prevention correction plug 4112 on the outer wall on one side of the deviation prevention through hole 4111. The deviation prevention correction plug 4112 is inserted into the deviation prevention through hole 4111. The two membrane shells 1 to be docked are wrapped and fixed by the fastening clamps 411 arranged in a symmetrical structure. One of the fastening clamps 411 is provided with a deviation prevention through hole 4111, and the other fastening clamp 411 is provided with a deviation prevention correction plug 4112 inserted into the deviation prevention through hole 4111. This can effectively prevent the deviation of the center docking pipe 2 due to the deviation of one of the membrane shells 1 during installation, thereby avoiding damage to the nanofiltration membrane element 3. This simplifies the replacement process. When one of the membrane shells 1 is installed or separated from the other membrane shell 1, the deviation prevention correction plug 4112 is inserted into the deviation prevention through hole 4111, which can effectively prevent the deviation of the center docking pipe 2 due to the deviation of the membrane shell 1, thereby preventing damage to the nanofiltration membrane element 3.

[0028] In this embodiment, the nanofiltration membrane element 3 is inserted and installed in each membrane shell 1, the center docking pipe 2 is installed at the end of the nanofiltration membrane element 3 in the membrane shell 1, and a plurality of membrane shells 1 are arranged in sequence, which facilitates the replacement of a single nanofiltration membrane element 3. Unlike the traditional method, the nanofiltration membrane element 3 does not need to be replaced by sequentially disassembling multiple components, which greatly reduces the difficulty of maintenance, saves a lot of time and labor, and simplifies the replacement process. The two membrane shells 1 to be installed are wrapped and fixed by the fastening clamps 411 arranged in a symmetrical structure. When one of the membrane shells 1 is installed or separated from the other membrane shell 1, the deviation prevention correction plug 4112 is inserted into the deviation prevention through hole 4111, which can effectively prevent the deviation of the center docking pipe 2 due to the deviation of the membrane shell 1, thereby preventing damage to the nanofiltration membrane element 3.

[0029] Please refer to the accompanying Figure 2 , 4As shown in FIGS. 5, the connecting piece 42 comprises a base 421, a driving connecting rod 422 and a driven connecting rod 423. The base 421 is connected to the bottom of the fastening clamp 411. The driving connecting rod 422 and the driven connecting rod 423 are parallel and symmetrically arranged on the outer walls of the base 421. The two ends of the driven connecting rod 423 are rotatably connected to the outer walls of the base 421 and the support base 431 through rotating shafts. One end of the driving connecting rod 422 is rotatably connected to the outer wall of the base 421 on one side of the driven connecting rod 423 through a rotating shaft. The driving connecting rod 422 and the driven connecting rod 423 rotatably connected through rotating shafts provide a stable and adjustable connecting basis for the operation of the butt joint installation opening and closing assembly 43.

[0030] The docking installation opening and closing assembly 43 comprises a support seat 431 and a driving member located inside the support seat 431. The driving member comprises a driving gear 432, a driven gear 433, a rack 434 and a shaft 435. The driving member is used to adjust the position of the fastening clamp 411, so that the membrane shell 1 is horizontally located on the other side during docking installation. The shaft 435 is symmetrically installed inside the support seat 431. Each end of the shaft 435 is connected with the support seat 431 through a bearing seat. The driven gear 433 is sleeved on the outer circumferential wall of one end of each shaft 435. An operating shaft 4321 is connected to one side of the outer wall of the driving gear 432. The end of the operating shaft 4321 penetrates through the support seat 431 and extends to the outside. The end of the operating shaft 4321 is connected with an external driving motor. The external driving motor is used to drive and further adjust the fastening clamp 411. The rack 434 is symmetrically engaged on both sides of the driving gear 432. One of the racks 434 is engaged with and connected to the driven gear 433 on one of the shafts 435. The other rack 434 is engaged with and connected to the driven gear 433 on the other shaft 435. One end of the driving connecting rod 422 away from the base 421 is fixedly connected to the end of the shaft 435 close to the base 421. The other end of the driving connecting rod 422 away from the base 421 is fixedly connected to the end of the other shaft 435 close to the base 421. When the external driving motor drives the operating shaft 4321 to rotate, it drives the rack 434 engaged with the driving gear 432 on the operating shaft 4321 to displace, and further drives the driven gear 433 engaged with the rack 434 to rotate, thereby driving the shaft 435 to adjust the driving connecting rod 422. A U-shaped sliding block is slidably connected to the outer wall of each rack 434. The outer wall of each U-shaped sliding block is connected with the inner wall of the support seat 431. The U-shaped sliding block is used to limit the sliding position of the rack 434, so that the horizontal displacement of the rack 434 is ensured. When the external driving motor drives the operating shaft 4321 to rotate, the driving gear 432 rotates. Due to the engagement relationship between the rack 434 and the driving gear 432, and the engagement between the rack 434 and the driven gear 433, the shaft 435 rotates. The rotation of the shaft 435 drives the driving connecting rod 422 to swing, thereby driving the driven connecting rod 423 to swing and displace, driving the other base 421 and the fastening clamp 411 thereon to move, thereby realizing the docking or separation of the two membrane shells 1.

[0031] In use, when installing two membrane shells 1, one end of the center butt joint pipe 2 is inserted into the end of the nanofiltration membrane core 3, and the two fastening clamps 411 are respectively wrapped around the outer circumferential wall of the end of the butt joint of the two membrane shells 1 and are fastened by threads, when the external driving motor drives the operating shaft 4321 to rotate, the driving gear 432 rotates, due to the meshing relationship between the rack 434 and the driving gear 432, and the meshing between the rack 434 and the driven gear 433, the shaft 435 rotates, the rotation of the shaft 435 drives the driving connecting rod 422 fixedly connected thereto to swing, the swinging of the driving connecting rod 422 drives the driven connecting rod 423 to swing and displace, the swinging and displacement of the driven connecting rod 423 drives the other base 421 and the fastening clamps 411 thereon to move, thereby realizing the butt joint action of the ends of the two membrane shells 1, the rack 434 moves horizontally on the U-shaped sliding block, at this time the anti-deviation correction plug 4112 slides in the anti-deviation through hole 4111, continuously plays the role of preventing the membrane shell 1 from deviating to drive the center butt joint pipe 2 to deviate and damage the nanofiltration membrane core 3, ensures that the installation position of the nanofiltration membrane core 3 at the end of the two membrane shells 1 is accurate, and after butt joint is completed, the two membrane shells 1 are connected by the external wrapping clamp, when the two membrane shells 1 are separated and disassembled, the above steps are operated in reverse.

[0032] The application facilitates butt joint installation of single membrane shells in series by arranging the butt joint installation device, and when replacing a single membrane core, a plurality of components do not need to be disassembled in sequence, thereby greatly reducing the maintenance difficulty and saving a large amount of time and manpower.

[0033] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0034] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A replaceable cartridge-type hollow fiber nanofiltration membrane core, comprising a plurality of membrane shells (1), a central connecting tube (2), a nanofiltration membrane core (3) located inside the membrane shells (1), and a docking installation device (4) for docking and installing the ends of two membrane shells (1), characterized in that: The docking installation device (4) includes a fastening assembly (41) for fastening the two membrane shells (1). The fastening assembly (41) is arranged in a symmetrical structure. The bottom of the two fastening assemblies (41) is connected to a docking installation opening and closing assembly (43) through a connector (42). The nanofiltration membrane core (3) is inserted and installed inside each of the membrane housings (1), and the central connecting pipe (2) is installed at the end of the nanofiltration membrane core (3) inside the membrane housing (1).

2. The replaceable filter cartridge hollow fiber nanofiltration membrane core according to claim 1, characterized in that: Each of the fastening components (41) includes a fastening clamp (411) for fastening the outer circumferential wall of the mating end of the membrane shell (1). One of the fastening clamps (411) has a through hole (4111) for preventing displacement. The other fastening clamp (411) located on one side of the through hole (4111) has an anti-displacement correction rod (4112) on its outer wall. The anti-displacement correction rod (4112) is inserted into the anti-displacement through hole (4111).

3. The replaceable filter cartridge hollow fiber nanofiltration membrane core according to claim 2, characterized in that: The connector (42) includes a base (421), an active connecting rod (422), and a driven connecting rod (423). The base (421) is connected to the bottom of the fastening clamp (411). The active connecting rod (422) is parallel to one side of the driven connecting rod (423). The active connecting rod (422) and the driven connecting rod (423) are symmetrically distributed on the outer walls of both sides of the base (421). One end of each of the active connecting rod (422) and the driven connecting rod (423) is rotatably connected to the base (421) through a pivot.

4. The replaceable cartridge hollow fiber nanofiltration membrane core according to claim 1, characterized in that: The docking and mounting opening and closing assembly (43) includes a support base (431) and a driving component located inside the support base (431). The driving component includes a driving gear (432), a driven gear (433), a rack (434), and a shaft (435). The shafts (435) are symmetrically installed inside the support base (431). Both ends of each shaft (435) are connected to the support base (431) through bearing seats. The driven gear (433) is sleeved on the outer circumference of one end of each shaft (435). On the wall, an operating shaft (4321) is connected to the outer wall of one side of the driving gear (432). The end of the operating shaft (4321) passes through the support base (431) and extends to its outside. The racks (434) are symmetrically meshed on both sides of the driving gear (432). One rack (434) is meshed with the driven gear (433) on one of the shafts (435) and the other rack (434) is meshed with the driven gear (433) on the other shaft (435).

5. The replaceable filter cartridge hollow fiber nanofiltration membrane core according to claim 3, characterized in that: One of the active connecting rods (422) is fixedly connected at one end away from the base (421) to the end of its adjacent shaft (435), and the other active connecting rod (422) is fixedly connected at one end away from the base (421) to the end of its adjacent other shaft (435).

6. The replaceable cartridge hollow fiber nanofiltration membrane core according to claim 4, characterized in that: The end of the operating shaft (4321) is connected to an external drive motor.

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