Reverse osmosis membrane air tightness detection device

Abstract

The utility model relates to the technical field of reverse osmosis membranes, in particular to a reverse osmosis membrane air tightness detection device which comprises a base, a piston and a driving assembly, a main control module is arranged on one side of the base, an electric telescopic rod is arranged above the base, and the movable end of the electric telescopic rod is fixedly connected with a lifting table. A driving assembly is arranged above the lifting table, a pressure table is arranged at the bottom of the lifting table, the pressure table is in sliding connection with the lifting table, a sealing table is arranged at the bottom of the pressure table, a plurality of cavities are formed in the inner side of the sealing table, a piston is arranged on the inner side of each cavity, and an air pressure sensor is arranged above the piston; according to the utility model, the low-pressure area is formed in the cavity in the sealing table to attract external air to penetrate through the reverse osmosis membrane to carry out air tightness detection, and each cavity of the sealing table carries out partitioned air tightness detection on the reverse osmosis membrane, so that an operator can obtain air tightness information of different partitions of the reverse osmosis membrane; and unqualified reverse osmosis membranes are prevented from passing a quality inspection link.

Description

Technical Field

[0001] This utility model relates to the field of reverse osmosis membrane technology, and in particular to a reverse osmosis membrane airtightness testing device. Background Technology

[0002] A reverse osmosis membrane is an artificial semi-permeable membrane with specific properties, mimicking a biological semi-permeable membrane. It is the core component of reverse osmosis technology. The principle of reverse osmosis is based on the principle that, under pressure higher than the osmotic pressure of the solution, other substances cannot pass through the semi-permeable membrane, thus separating them from water. The membrane pores of a reverse osmosis membrane are extremely small, thus effectively removing dissolved salts, colloids, microorganisms, organic matter, and other pollutants from water. The system offers advantages such as high water quality, low energy consumption, no pollution, simple process, and easy operation.

[0003] During the production process of reverse osmosis membranes, it is necessary to test the air tightness of the reverse osmosis membranes. Most existing air tightness testing devices can only test the overall air tightness of the membrane, and their ability to test the air tightness of different areas of the membrane is poor. Therefore, reverse osmosis membranes with poor air tightness in some areas may pass the quality inspection process.

[0004] Therefore, to address the above issues, a reverse osmosis membrane airtightness testing device can be designed to perform zoned airtightness testing on the reverse osmosis membrane, preventing unqualified reverse osmosis membranes from passing through the quality inspection process. Utility Model Content

[0005] To overcome the problem that airtightness testing of reverse osmosis membranes is required during the production process, most existing airtightness testing devices can only test the overall airtightness of the membrane and have poor ability to test the airtightness of different areas of the membrane. Therefore, reverse osmosis membranes with poor airtightness in some areas may pass the quality inspection process.

[0006] The technical solution of this utility model is as follows: a reverse osmosis membrane airtightness testing device, comprising a base, a piston, and a drive assembly. A main control module is provided on one side of the base, an electric telescopic rod is provided above the base, a lifting platform is fixedly connected to the movable end of the electric telescopic rod, a drive assembly is provided above the lifting platform, a pressure platform is provided at the bottom of the lifting platform, the pressure platform is slidably connected to the lifting platform, a sealing platform is provided at the bottom of the pressure platform, the sealing platform is fixedly connected to the lifting platform, multiple sets of chambers are opened inside the sealing platform, a piston is provided inside each set of chambers, the piston is slidably sealed to the sealing platform, a pressure sensor is provided above the piston, and the pressure sensor is electrically connected to the main control module.

[0007] Preferably, the base has ventilation holes, and a contact mesh plate is provided at the bottom of the sealing platform and above the base, with small ventilation holes in the contact mesh plate.

[0008] Preferably, a sealing strip is provided at the bottom of the contact mesh plate at the bottom of the sealing platform, and the sealing strips are arranged perpendicularly to each other around each group of chambers of the sealing platform.

[0009] Preferably, the drive assembly includes a drive motor, a threaded rod, and a drive block. The threaded rod is located above the pressure table and is fixedly connected to the pressure table. The drive block is located above the lifting table and is threadedly connected to the threaded rod. The drive block is rotatably connected to the lifting table.

[0010] Preferably, a drive motor is provided on one side of the lifting platform, a transmission belt is provided between the output end of the drive motor and the drive block, and a limit frame is provided above the drive block, with the limit frame fixedly connected to the lifting platform.

[0011] Preferably, the bottom of the lifting platform is provided with a first connecting rod, which passes through the pressure platform and is fixedly connected to the sealing platform, and is slidably connected to the pressure platform.

[0012] Preferably, an extension rod is provided above the piston, a connecting block is provided above the extension rod, a second connecting rod is provided above the connecting block, and a sealing ring is provided on the outside of the piston.

[0013] The beneficial effects of this utility model are:

[0014] During airtightness testing, the reverse osmosis membrane to be tested is placed on top of the base. The electric telescopic rod presses the sealing platform against the base, and then the drive assembly drives all the pistons to move upward, creating a low-pressure zone in the cavity inside the sealing platform. This attracts external air to pass through the reverse osmosis membrane for airtightness testing. Each chamber of the sealing platform performs zoned airtightness testing on the reverse osmosis membrane. The main control module obtains the rate of change of air pressure in each chamber through the air pressure sensor in each chamber, so that the operator can obtain airtightness information of different zones of the reverse osmosis membrane, preventing unqualified reverse osmosis membranes from passing through the quality inspection process. Attached Figure Description

[0015] Figure 1 The diagram shown is a three-dimensional structural schematic of a reverse osmosis membrane airtightness testing device according to this utility model.

[0016] Figure 2 The diagram shown is a three-dimensional structural schematic of the sealing platform of a reverse osmosis membrane airtightness testing device according to this utility model.

[0017] Figure 3 The diagram shown is a three-dimensional structural schematic of the drive component of a reverse osmosis membrane airtightness detection device according to this utility model.

[0018] Figure 4 The diagram shown is a three-dimensional structural schematic of the piston in a reverse osmosis membrane airtightness testing device according to this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Base; 2. Electric telescopic rod; 3. Lifting platform; 4. Pressure platform; 5. Sealing platform; 6. Drive motor; 7. Piston; 8. Air pressure sensor; 9. Main control module; 101. Vent hole; 301. First connecting rod; 401. Second connecting rod; 501. Contact wire plate; 502. Sealing strip; 601. Transmission belt; 602. Threaded rod; 603. Drive block; 604. Limiting frame; 701. Sealing ring; 702. Heightening rod; 703. Connecting block. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please see Figures 1-4 This utility model provides an embodiment: a reverse osmosis membrane airtightness testing device, including a base 1, a piston 7, and a drive assembly. A main control module 9 is provided on one side of the base 1, an electric telescopic rod 2 is provided above the base 1, and a lifting platform 3 is fixedly connected to the movable end of the electric telescopic rod 2. A drive assembly is provided above the lifting platform 3, and a pressure platform 4 is provided at the bottom of the lifting platform 3. The pressure platform 4 is slidably connected to the lifting platform 3, and a sealing platform 5 is provided at the bottom of the pressure platform 4. The sealing platform 5 is fixedly connected to the lifting platform 3. Multiple sets of chambers are opened inside the sealing platform 5, and a piston 7 is provided inside each set of chambers. The piston 7 is slidably and sealingly connected to the sealing platform 5. A drive assembly is provided above the piston 7. There is a pressure sensor 8, which is electrically connected to the main control module 9. During the air tightness test, the reverse osmosis membrane to be tested is placed above the base 1. The electric telescopic rod 2 presses the sealing platform 5 against the base 1. Then, the drive assembly drives all the pistons 7 to move upward, forming a low-pressure zone in the cavity inside the sealing platform 5. This attracts external air to pass through the reverse osmosis membrane for air tightness testing. Each chamber of the sealing platform 5 performs zoned air tightness testing on the reverse osmosis membrane. The main control module 9 obtains the rate of change of air pressure in each chamber through the pressure sensor 8 of each chamber. This allows the operator to obtain air tightness information of different zones of the reverse osmosis membrane, preventing unqualified reverse osmosis membranes from passing through the quality inspection process.

[0022] Please see Figure 2 In this embodiment, the base 1 has a ventilation hole 101, and a contact mesh plate 501 is provided at the bottom of the sealing platform 5 and above the base 1. The contact mesh plate 501 has small ventilation holes, and a sealing strip 502 is provided at the bottom of the contact mesh plate 501 at the bottom of the sealing platform 5. The sealing strips 502 are arranged perpendicularly around each group of chambers of the sealing platform 5. During the air tightness test, the sealing strips 502 separate the space between the sealing platform 5 and the permeation membrane above the base 1 to prevent air from flowing between different zones and affecting the air tightness test of the zone. The ventilation hole 101 and the contact mesh plate 501 with mesh facilitate air to flow from one side of the reverse osmosis membrane to the other side.

[0023] Please see Figures 3-4 In this embodiment, the driving assembly includes a drive motor 6, a threaded rod 602, and a drive block 603. The threaded rod 602 is positioned above the pressure table 4 and is fixedly connected to the pressure table 4. The drive block 603 is positioned above the lifting platform 3 and is threadedly connected to the threaded rod 602. The drive block 603 is rotatably connected to the lifting platform 3. The drive motor 6 is positioned on one side of the lifting platform 3. A transmission belt 601 is positioned between the output end of the drive motor 6 and the drive block 603. A limit frame 604 is positioned above the drive block 603 and is fixedly connected to the lifting platform 3. A first connecting rod 301 is positioned at the bottom of the lifting platform 3. The first connecting rod 301 passes through the pressure table 4 and is fixedly connected to the sealing platform 5. The first connecting rod 301 is slidably connected to the pressure table 4. A lifting rod 702 is provided above the piston 7, a connecting block 703 is provided above the lifting rod 702, a second connecting rod 401 is provided above the connecting block 703, and a sealing ring 701 is provided on the outside of the piston 7. The drive motor 6 uses a transmission belt 601 to drive the two sets of drive blocks 603 to rotate. The threaded connection between the drive block 603 and the threaded rod 602 drives the pressure table 4 to move upward, and the second connecting rod 401 pushes the connecting block 703 and the lifting rod 702 to move upward, thereby causing the piston 7 to move upward and create a low-pressure area in the space at the bottom of the piston 7 for airtightness testing. The sealing ring 701 is used to enhance the sealing between the piston 7 and the chamber of the sealing table 5. The lifting rod 702 leaves space for the installation of the pressure sensor 8. The first connecting rod 301 is used to connect the lifting table 3 and the sealing table 5.

[0024] During airtightness testing, the reverse osmosis membrane to be tested is placed above the base 1. The electric telescopic rod 2 pushes the lifting platform 3 and uses the first connecting rod 301 to push the sealing platform 5 down, pressing the reverse osmosis membrane onto the base 1. The sealing strip 502 separates the space between the sealing platform 5 and the membrane above the base 1. The drive motor 6 uses the transmission belt 601 to drive the two sets of drive blocks 603 to rotate. The threaded connection between the drive block 603 and the threaded rod 602 drives the pressure platform 4 to move upward, and uses the second connecting rod 401 to push the connecting block 703 and the lifting rod 702 to move upward, thereby causing the piston 7 to move upward and create a low-pressure zone in the space at the bottom of the piston 7, attracting external air to pass through the reverse osmosis membrane. Each chamber of the sealing platform 5 performs zoned airtightness testing on the reverse osmosis membrane. The main control module 9 obtains the rate of change of air pressure in each chamber through the air pressure sensor 8 of each chamber, so that the operator can obtain the airtightness information of different zones of the reverse osmosis membrane, preventing unqualified reverse osmosis membranes from passing through the quality inspection process.

[0025] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A reverse osmosis membrane airtightness testing device, comprising a base (1); characterized in that: It also includes a piston (7) and a drive assembly. A main control module (9) is provided on one side of the base (1). An electric telescopic rod (2) is provided above the base (1). A lifting platform (3) is fixedly connected to the movable end of the electric telescopic rod (2). A drive assembly is provided above the lifting platform (3). A pressure platform (4) is provided at the bottom of the lifting platform (3). The pressure platform (4) is slidably connected to the lifting platform (3). A sealing platform (5) is provided at the bottom of the pressure platform (4). The sealing platform (5) is fixedly connected to the lifting platform (3). Multiple chambers are opened inside the sealing platform (5). A piston (7) is provided inside each chamber. The piston (7) is slidably sealed to the sealing platform (5). A pressure sensor (8) is provided above the piston (7). The pressure sensor (8) is electrically connected to the main control module (9).

2. The reverse osmosis membrane airtightness testing device according to claim 1, characterized in that: The base (1) has ventilation holes (101), and the bottom of the sealing platform (5) and the top of the base (1) are provided with a contact mesh plate (501), which has small ventilation holes.

3. The reverse osmosis membrane airtightness testing device according to claim 2, characterized in that: A sealing strip (502) is provided at the bottom of the contact mesh plate (501) at the bottom of the sealing platform (5). The sealing strips (502) are arranged perpendicularly to each other around each group of chambers of the sealing platform (5).

4. The reverse osmosis membrane airtightness testing device according to claim 1, characterized in that: The drive assembly includes a drive motor (6), a threaded rod (602), and a drive block (603). The threaded rod (602) is provided above the pressure table (4) and is fixedly connected to the pressure table (4). The drive block (603) is provided above the lifting platform (3) and is threadedly connected to the threaded rod (602). The drive block (603) is rotatably connected to the lifting platform (3).

5. The reverse osmosis membrane airtightness testing device according to claim 4, characterized in that: A drive motor (6) is provided on one side of the lifting platform (3). A transmission belt (601) is provided between the output end of the drive motor (6) and the drive block (603). A limit frame (604) is provided above the drive block (603). The limit frame (604) is fixedly connected to the lifting platform (3).

6. The reverse osmosis membrane airtightness testing device according to claim 1, characterized in that: The bottom of the lifting platform (3) is provided with a first connecting rod (301), which passes through the pressure platform (4) and is fixedly connected to the sealing platform (5). The first connecting rod (301) is slidably connected to the pressure platform (4).

7. The reverse osmosis membrane airtightness testing device according to claim 1, characterized in that: An ascending rod (702) is provided above the piston (7), a connecting block (703) is provided above the ascending rod (702), a second connecting rod (401) is provided above the connecting block (703), and a sealing ring (701) is provided on the outside of the piston (7).

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