Hollow fiber curtain type membrane integrity testing device

Abstract

The utility model discloses a hollow fiber curtain type membrane integrity testing device, which relates to the technical field of hollow fiber curtain type membrane integrity testing and comprises a testing groove, a hollow fiber curtain type membrane integrity testing device and a hollow fiber curtain type membrane integrity testing device, the two clamp assemblies are movably arranged on the side wall of the test groove and are respectively used for fixedly clamping membrane shells at two ends of the hollow fiber curtain type membrane, and the clamp assemblies can horizontally move along the side wall of the test groove; the air source assembly is communicated with one end of the membrane shell and is used for introducing an air source into the membrane shell when the integrity of the hollow fiber curtain type membrane and the membrane shell is tested. The hollow fiber curtain type membrane integrity testing device provided by the utility model can be used for testing the integrity of the hollow fiber curtain type membrane at the membrane shell connecting position, so as to determine the leakage position and facilitate the subsequent repair.

Description

Technical Field

[0001] The utility model relates to the technical field of hollow fiber curtain type membrane integrity testing, in particular to a hollow fiber curtain type membrane integrity testing device. Background Art

[0002] The hollow fiber curtain membrane is a curtain membrane device composed of hollow fiber membrane, water collecting pipe, casting trough, membrane shell and end-sealing resin and other materials. The core of this membrane technology is the hollow fiber membrane filament, which is made into a curtain structure through a special process to form a membrane assembly. It is widely used in the field of sewage treatment because of its high membrane filament filling capacity, easy installation and cleaning, good water output effect and small footprint.

[0003] The membrane shell is the external packaging structure of the hollow fiber curtain membrane module, which is used to protect the internal membrane filaments and provide a stable frame so that the membrane module can work normally in the water treatment system. The membrane shell provides a solid external protective layer to prevent the membrane filaments from being physically damaged during operation. The structure inside the membrane shell is designed to fix and arrange the hollow fiber membrane filaments to ensure that the membrane filaments remain stable under the impact of water flow and prevent twisting or entanglement. The membrane assembly usually contains interfaces for water inlet, water production and aeration, which facilitates the connection of the membrane assembly with other parts of the water treatment system; when the curtain membrane is used, the membrane needs to be completely immersed in the solution to be filtered. Under the action of a water pump or siphon, the solution to be filtered passes through the hollow fiber membrane and enters the water collection pipe to complete the membrane filtration. This requires good sealing between the hollow fiber membrane and the membrane shell, otherwise the solution to be filtered will not be filtered by the membrane, but will directly enter the water collection pipe through the gap between the curtain membrane and the membrane shell, causing the water quality of the curtain membrane to deteriorate.

[0004] In order to ensure that the sealing of the connection between the curtain membrane and the membrane shell meets the requirements, the hollow fiber curtain membrane needs to be integrity tested before use to ensure that it will not leak. At present, there is an urgent need to design a technical solution suitable for the integrity test of the hollow fiber curtain membrane. Utility Model Content

[0005] The utility model aims to provide a hollow fiber curtain membrane integrity testing device to solve the problems existing in the above-mentioned prior art, and can perform integrity testing on the hollow fiber curtain membrane at the membrane shell connection position to determine the leakage position for subsequent repair.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model provides a hollow fiber curtain membrane integrity testing device, comprising:

[0008] A test tank, which is used to hold a test solution;

[0009] A clamp assembly, wherein two clamp assemblies are movably disposed at the side walls of the test slot, and are respectively used to fix and clamp the membrane shells at both ends of the hollow fiber curtain membrane, and the clamp assemblies can move horizontally along the side walls of the test slot;

[0010] The air source component is connected to one end of the membrane shell and is used to introduce the air source into the membrane shell when testing the integrity of the hollow fiber curtain membrane and the membrane shell. When the utility model is used, the hollow fiber curtain membrane and the membrane shell are immersed in water, the pressure of the pressure regulating valve is set, and the air source is introduced. At this time, it can be observed whether there are bubbles at the position of the hollow fiber curtain membrane and the membrane shell. The position with bubbles is the position where the sealing is incomplete and the leakage occurs, which is convenient for subsequent targeted repair of the leakage position.

[0011] Optionally, the test slot is a rectangular slot structure with an open top, and a bracket is fixedly provided at the bottom of the test slot.

[0012] Optionally, the clamp assembly includes clamp movable ends symmetrically arranged at two side walls of the test slot, a cross bar is fixedly connected between the two clamp movable ends, a membrane shell fixing clamp is provided on the cross bar, and the membrane shell fixing clamp is used to fix and clamp the membrane shell at one end of the hollow fiber curtain membrane.

[0013] Optionally, a membrane curtain top rod is fixed between the two movable ends of the clamps, and the membrane curtain top rod is located on the upper part of the membrane shell fixing clamp. The membrane curtain top rod is used to support the hollow fiber curtain membrane, and the membrane shell at one end of the hollow fiber curtain membrane is connected to the membrane shell fixing clamp after passing through the upper part of the membrane curtain top rod. If a leak is found in the hollow fiber curtain membrane during detection, it needs to be repaired. According to test experience, it is difficult to observe the leak when the leak is located at the connection between the membrane wire and the membrane shell. At this time, the membrane curtain top rod can be used as a lifting rod to lift the membrane wire to a certain height, and the connection between the membrane wire and the membrane shell can be sunk below the liquid surface, while facing the direction of the tester, which is convenient for the tester to observe and repair.

[0014] Optionally, a driving assembly is provided on the outer wall of the test slot, and the driving assembly can drive the fixture assembly to move horizontally along the side wall of the test slot.

[0015] Optionally, the driving assembly includes a guide rail horizontally arranged on the outer wall of the test slot, a pulley is slidably provided on the guide rail, a connecting back plate is fixedly connected to the outer side of the pulley, and the movable end of the clamp is arranged on the connecting back plate.

[0016] Optionally, a drive motor is provided under the guide rail, and the drive motor is fixedly connected to the bottom of the connecting back plate through a transmission connecting piece, and the drive motor can drive the connecting back plate and the pulley to move along the guide rail.

[0017] Optionally, the movable end of the fixture includes an L-shaped plate arranged on the inner side of the test slot, a vertically arranged guide rod cylinder is fixedly provided on the inner side of the connecting back plate, and the end of the telescopic rod of the guide rod cylinder is fixedly connected to the L-shaped plate.

[0018] Optionally, the gas source assembly includes a pressure regulating valve, one end of the pressure regulating valve is connected to the membrane shell through an air pipe joint assembly, and the other end is connected to an external gas source device.

[0019] Optionally, the air pipe joint assembly includes an air pipe, one end of which is connected to the pressure regulating valve via a solenoid valve, and the other end of the air pipe is sealed and connected to one end of the membrane shell via a first socket joint, a second socket joint or a threaded joint.

[0020] Compared with the prior art, the utility model has achieved the following technical effects:

[0021] The utility model connects the membrane shells at both ends of the hollow fiber curtain membrane through two clamp assemblies, respectively, and unfolds the hollow fiber curtain membrane at the test slot. By adjusting the distance between the two clamp assemblies, it can adapt to the test of hollow fiber curtain membranes of different lengths. During the test, the position to be tested is immersed in the test solution, and gas is introduced into the membrane shell. By observing whether bubbles are generated, the sealing performance between the membrane shell and the membrane filaments of the hollow fiber curtain membrane is judged. The test result is more intuitive, which is convenient for the operator to repair the leakage position in a targeted manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the structure of the hollow fiber curtain membrane integrity testing device of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the transmission connecting part of the utility model;

[0025] Figure 3 This is a schematic diagram of the first trachea joint assembly of the utility model;

[0026] Figure 4 This is a schematic diagram of a second trachea joint assembly of the utility model;

[0027] Figure 5 This is a schematic diagram of a third trachea joint assembly of the utility model;

[0028] Figure 6This is a schematic diagram of a hollow fiber curtain membrane having a first membrane shell structure according to the utility model;

[0029] Figure 7 for Figure 6 A top view of

[0030] Figure 8 for Figure 6 Side view of

[0031] Fig. 9 This is a schematic diagram of a hollow fiber curtain membrane with a second membrane shell structure of the utility model;

[0032] Fig.10 for Fig. 9 A top view of

[0033] Fig.11 for Fig. 9 Side view of

[0034] Fig.12 This is a schematic diagram of a hollow fiber curtain membrane with a third membrane shell structure of the utility model;

[0035] Fig.13 for Fig.12 A top view of

[0036] Fig.14 for Fig.12 Side view of.

[0037] In the figure: 1-hollow fiber curtain membrane; 2-test tank; 3-clamp assembly; 31-membrane shell fixing clamp; 32-membrane curtain top rod; 33-guide rod cylinder; 4-pressure regulating valve; 5-air pipe joint assembly; 51-first socket-type joint; 52-threaded joint; 53-second socket-type joint; 54-solenoid valve; 6-connecting back plate; 7-pulley; 8-driving motor; 9-transmission connecting piece; 10-guide rail. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] The utility model aims to provide a hollow fiber curtain membrane integrity testing device to solve the problems existing in the above-mentioned prior art, and can perform integrity testing on the hollow fiber curtain membrane at the membrane shell connection position to determine the leakage position for subsequent repair.

[0040] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] The utility model provides a hollow fiber curtain membrane integrity test device. The membrane wires at both ends of the hollow fiber curtain membrane are fixedly sealed and connected to the membrane shell. It is necessary to focus on testing the sealing performance of this part. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the structure of the utility model includes a test slot 2, which is a rectangular slot structure with an opening at the top, a bracket is fixedly provided at the bottom of the test slot 2, the test slot 2 is used to hold a test solution, a standard liquid level line is provided in the test slot 2, and when working, the test solution is replenished to the standard liquid level line in the test slot 2, and the test solution in this embodiment can be water; two clamp assemblies 3 are movably arranged at the side walls of the test slot 2, respectively used to fix and clamp the membrane shells at both ends of the hollow fiber curtain membrane 1, and the clamp assembly 3 can move horizontally along the side walls of the test slot 2, and then by changing the distance between the two clamp assemblies 3, it can be suitable for testing hollow fiber curtain membranes 1 of different lengths; the air source assembly is connected to one end of the membrane shell, and is used to introduce an air source into the membrane shell when testing the integrity of the hollow fiber curtain membrane 1 and the membrane shell. When the utility model is used, the hollow fiber curtain membrane 1 and the membrane shell are immersed in water, the pressure of the pressure regulating valve 4 is set, and the air source is introduced. At this time, it is possible to observe whether bubbles emerge from the position of the hollow fiber curtain membrane 1 and the membrane shell. The position where the bubble occurs is the position where the sealing is incomplete and the leakage occurs, so that the leakage position can be repaired in a targeted manner later.

[0042] In order to facilitate the fixation of the hollow fiber curtain membrane 1 and to be able to adapt to the testing requirements of hollow fiber curtain membranes 1 of different lengths, in this embodiment, the clamp assembly 3 includes a clamp movable end symmetrically arranged at the two side walls of the test slot 2, and a cross bar is fixedly connected between the two clamp movable ends. A membrane shell fixing clamp 31 is provided on the cross bar. The membrane shell fixing clamp 31 is used to fix and clamp the membrane shell at one end of the hollow fiber curtain membrane 1. The membrane shell fixing clamp 31 is located in the middle position of the test slot 2. It is a clamp structure with an open top. The membrane shell can be clamped by bolts to keep the root of the membrane wire at the connection with the membrane shell in an upward posture, which is convenient for the operator to check.

[0043] For some membrane filaments, it is not suitable to be soaked in water before formal use. During the test, the membrane shell clamp is lowered so that only the membrane shell part of the hollow fiber curtain membrane 1 is below the liquid surface, and the integrity of the membrane shell can be tested. In order to achieve this function, in this embodiment, a membrane curtain top rod 32 is fixed between the two movable ends of the clamps. The membrane curtain top rod 32 is located on the upper part of the membrane shell fixing clamp 31. The membrane curtain top rod 32 is used to support the hollow fiber curtain membrane 1, and can prop up the membrane filaments of the hollow fiber curtain membrane 1 to be higher than the horizontal height of the membrane shell. The membrane shell at one end of the hollow fiber curtain membrane 1 is connected to the membrane shell fixing clamp 31 after bypassing the upper part of the membrane curtain top rod 32. Therefore, when testing is needed, only the membrane shell clamp can be immersed in the test solution, and the membrane filaments of the hollow fiber curtain membrane 1 are supported by the membrane curtain top rod 32 and have no contact with the liquid surface, thereby realizing the test of the membrane shell position.

[0044] Furthermore, for the membrane that can be soaked in water before formal use, the membrane shell clamp can continue to descend so that the membrane wire is completely immersed in water. At this time, due to the existence of the membrane curtain top rod 32, the membrane wire has a certain tension and is in a taut state. When immersed below the liquid level, it will not float or shake, and the membrane wire can be completely soaked. In order to achieve this function, the present embodiment is provided with a guide rod cylinder 33 at the side wall of the test slot 2. The movable end of the clamp adopts an L-shaped plate located on the inner side of the test slot 2. The end of the telescopic rod of the guide rod cylinder 33 is fixedly connected to the L-shaped plate, so that the telescopic rod of the guide rod cylinder 33 can control the movable end of the clamp to move up and down, thereby driving the membrane shell clamp to move up and down to achieve different degrees of soaking. The height of the guide rod cylinder 33 can be controlled by the PLC and set on the equipment operation interface.

[0045] In order to realize the movement of the two fixture assemblies 3 along the outer wall of the test slot 2, a horizontally arranged guide rail 10 is provided on the outer wall of the test slot 2 in this embodiment, and a pulley 7 is slidably provided on the guide rail 10. A connecting back plate 6 is fixedly connected to the outer side of the pulley 7. The movable end of the fixture is arranged on the connecting back plate 6. In this embodiment, the guide rod cylinder 33 is fixed to the inner side of the connecting back plate 6 and can follow the synchronous movement. A driving motor 8 is provided below the guide rail 10. The driving motor 8 is fixedly connected to the bottom of the connecting back plate 6 through a transmission connecting member 9. The driving motor 8 can drive the connecting back plate 6 and the pulley 7 to move along the guide rail 10.

[0046] The transmission connecting member 9 of this embodiment adopts a screw-nut mechanism, in which the screw is horizontally arranged below the guide rail 10 and is transmission-connected to the corresponding drive motor 8, and the nut on the screw is fixedly connected to the bottom of the connecting back plate 6, and the horizontal movement of the connecting back plate 6 is realized by the screw-nut mechanism; in other embodiments, other structures can also be used as the transmission connecting member 9, for example, a gear rack structure can be used, in which the drive motor 8 transmits the connecting gear, the gear meshes with the rack, and one end of the rack is connected to the bottom of the connecting back plate 6, which can also realize the function of driving the connecting back plate 6 to move horizontally.

[0047] The air source assembly of this embodiment includes a pressure regulating valve 4, the pressure of which can be controlled by a PLC and set on the device operation interface. One end of the pressure regulating valve 4 is connected to the membrane shell through an air pipe joint assembly 5, and the other end is connected to an external air source device. The air pipe joint assembly 5 of this embodiment includes an air pipe, one end of which is provided with an electromagnetic valve 54, which is connected to the pressure regulating valve 4 through a silicone hose, and the other end of the air pipe is sealed and connected to one end of the membrane shell through a first socket joint 51, a second socket joint 53 or a threaded joint 52; Figure 6 to Figure 14 As shown, there are three types of hollow fiber curtain membranes with membrane shells of different structural forms, and the connection states of three different types of membrane shells and corresponding air pipe joint assemblies are schematically shown. The three joints in the utility model have covered the connection types of most membrane shell products on the market. According to the joint type of the tested membrane curtain, the corresponding joint is selected. The solenoid valve 54 can be controlled by PLC and switched on and off on the operation interface. PLC is a programmable logic controller, which is a digital computing and operating electronic system designed for industrial environments. PLC is widely used in the field of automation control, such as manufacturing, process control, robot control, building automation, etc., for monitoring and controlling various mechanical equipment or production processes. PLC belongs to a conventional control device in the prior art, so it will not be described in detail.

[0048] In the utility model, for different membrane shell products on the market, select the corresponding connector, install the membrane shell on the membrane shell fixture, and connect the pressure regulating valve 4 to the membrane shell with the air pipe connection assembly. On the operation interface, adjust the spacing of the membrane shell fixture to tighten the membrane wire, and according to the test requirements, lower the height of the guide rod cylinder 33 to immerse the membrane curtain in water. Set the pressure of the pressure regulating valve 4 and introduce the air source. At this time, you can observe whether there are bubbles coming out of the membrane curtain. The height of the guide rod cylinder 33 should be able to immerse the membrane curtain 2cm below the liquid surface.

[0049] According to test experience, the connection between the membrane filament and the membrane shell is prone to air leakage, and bubbles are observed. In this embodiment, since the membrane shell is fixed in an upward direction, it is easy to find the leakage point at the connection between the membrane filament and the membrane shell during testing, which is convenient for subsequent repair.

[0050] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A hollow fiber curtain membrane integrity testing device, characterized in that: include: A test tank, which is used to hold a test solution; A clamp assembly, wherein two clamp assemblies are movably disposed at the side walls of the test slot, and are respectively used to fix and clamp the membrane shells at both ends of the hollow fiber curtain membrane, and the clamp assemblies can move horizontally along the side walls of the test slot; The air source component is connected to one end of the membrane shell and is used to introduce the air source into the membrane shell when testing the integrity of the hollow fiber curtain membrane and the membrane shell.

2. The hollow fiber curtain membrane integrity testing device according to claim 1, characterized in that: The test slot is a rectangular slot structure with an open top, and a bracket is fixedly arranged at the bottom of the test slot.

3. The hollow fiber curtain membrane integrity testing device according to claim 1, characterized in that: The clamp assembly includes clamp movable ends symmetrically arranged at two side walls of the test slot, a cross bar is fixedly connected between the two clamp movable ends, a membrane shell fixing clamp is provided on the cross bar, and the membrane shell fixing clamp is used to fix and clamp the membrane shell at one end of the hollow fiber curtain membrane.

4. The hollow fiber curtain membrane integrity testing device according to claim 3, characterized in that: A membrane curtain top rod is fixed between the two movable ends of the clamps. The membrane curtain top rod is located on the upper part of the membrane shell fixing clamp. The membrane curtain top rod is used to support the hollow fiber curtain membrane. The membrane shell at one end of the hollow fiber curtain membrane passes around the upper part of the membrane curtain top rod and is connected to the membrane shell fixing clamp.

5. The hollow fiber curtain membrane integrity testing device according to claim 3, characterized in that: A driving assembly is disposed on the outer wall of the test slot, and the driving assembly can drive the fixture assembly to move horizontally along the side wall of the test slot.

6. The hollow fiber curtain membrane integrity testing device according to claim 5, characterized in that: The driving assembly comprises a guide rail horizontally arranged on the outer wall of the test slot, a pulley is slidably provided on the guide rail, a connecting back plate is fixedly connected to the outer side of the pulley, and the movable end of the clamp is arranged on the connecting back plate.

7. The hollow fiber curtain membrane integrity testing device according to claim 6, characterized in that: A driving motor is provided below the guide rail, and the driving motor is fixedly connected to the bottom of the connecting back plate through a transmission connecting piece. The driving motor can drive the connecting back plate and the pulley to move along the guide rail.

8. The hollow fiber curtain membrane integrity testing device according to claim 6, characterized in that: The movable end of the fixture comprises an L-shaped plate arranged inside the test slot, a vertically arranged guide rod cylinder is fixed inside the connecting back plate, and the end of the telescopic rod of the guide rod cylinder is fixedly connected to the L-shaped plate.

9. The hollow fiber curtain membrane integrity testing device according to claim 1, characterized in that: The gas source component comprises a pressure regulating valve, one end of which is connected to the membrane shell through an air pipe joint component, and the other end of which is connected to an external gas source device.

10. The hollow fiber curtain membrane integrity testing device according to claim 9, characterized in that: The air pipe joint assembly comprises an air pipe, one end of which is connected to the pressure regulating valve via a solenoid valve, and the other end of which is sealed and connected to one end of the membrane shell via a first socket joint, a second socket joint or a threaded joint.

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