Leakage detection device

Abstract

The utility model discloses a kind of sealing detection devices, including sealed box, detecting element and gas supply mechanism, air rod is installed in sealed box;Detecting element includes nitrogen detector and alarm;Gas supply mechanism includes pipeline, booster pump, nitrogen cylinder and gas pressure flow regulating assembly, one end of pipeline is connected with nitrogen cylinder, the air rod is connected with the pipeline, booster pump and gas pressure flow regulating assembly are all arranged on pipeline, gas pressure flow regulating assembly is located between air rod and booster pump, gas pressure flow regulating assembly has display screen for showing air pressure;The utility model is set to sealed box, nitrogen detector, alarm and gas supply mechanism, both can detect the sealing property of glue on reverse osmosis membrane element by using the way of monitoring pressure-maintaining pressure, also can judge the sealing property of glue by detecting whether reverse osmosis membrane element leaks nitrogen, and then adopt the sealing property of glue of the two ways combined determination, ensure that detection result is accurate.

Description

Technical Field

[0001] This utility model relates to the field of filter elements, and in particular to a sealing performance testing device. Background Technology

[0002] Reverse osmosis membrane elements are manufactured by winding reverse osmosis membrane sheets, flow guides, and separators onto a central tube in a specific order. After winding, sealant is applied to the end faces, which are then allowed to cure. Adhesive tape is also fitted around the outer circumference of the entire structure after winding to prevent leakage from the sides of the membrane element, allowing leakage only at the end faces. The sealing performance of the end-face sealant directly determines the filtration performance of the reverse osmosis membrane element. If the end-face sealant leaks, has gaps, or is uneven in thickness, it can cause cross-contamination between the feed water and product water at the end faces, significantly reducing filtration efficiency. Currently, there is a lack of specialized devices on the market for testing the end-face sealing performance of reverse osmosis membrane elements. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a sealing performance testing device.

[0004] The technical solution of this utility model is as follows: it includes a sealed housing, a detection element, and a gas supply mechanism. A gas rod is installed inside the sealed housing, and a test element is mounted on the gas rod. The detection element includes a nitrogen detector installed inside the sealed housing and an alarm electrically connected to the nitrogen detector. The gas supply mechanism includes a pipeline, a booster pump, a nitrogen cylinder, and a gas pressure and flow regulating component. One end of the pipeline is connected to the nitrogen cylinder, and the gas rod is connected to the pipeline. The booster pump and the gas pressure and flow regulating component are both located on the pipeline. The gas pressure and flow regulating component is located between the gas rod and the booster pump, and the gas pressure and flow regulating component has a display screen for displaying gas pressure.

[0005] Furthermore, the gas supply mechanism also includes a pressure stabilizing tank, which is installed on the pipeline and located between the gas pressure and flow regulating component and the booster pump.

[0006] Furthermore, the gas pressure and flow rate regulating assembly includes a digital display pressure regulating valve and a gas flow meter arranged sequentially along the gas delivery direction of the pipeline, with the display screen located on the digital display pressure regulating valve.

[0007] Furthermore, a pressure relief pipe is connected to the other end of the pipe, the connection between the air rod and the pipe is located between the two ends of the pipe, and a pressure relief switch is installed on the pressure relief pipe.

[0008] Furthermore, the air rod is vertically arranged, and UV lamps are installed on the top and bottom walls inside the sealed box. The sealed enclosure has an observation port that allows observation of the end of the component under test.

[0009] Furthermore, cameras are installed on both the top wall and the bottom wall.

[0010] Furthermore, both the top wall and the bottom wall are equipped with two UV lamp sources, and a camera is disposed between the two UV lamp sources.

[0011] Furthermore, the observation port is located on the top wall.

[0012] Furthermore, the nitrogen detector is located on the side wall of the sealed enclosure.

[0013] Furthermore, multiple air rods are installed inside the sealed box, and the multiple air rods are spaced apart.

[0014] The sealing performance testing device according to this utility model has at least the following technical effects: 1. By setting up a sealed enclosure, nitrogen detector, alarm, and gas supply mechanism, the sealing performance of the adhesive on the reverse osmosis membrane element can be detected by monitoring the pressure holding pressure, and the sealing performance of the adhesive can also be determined by detecting whether the reverse osmosis membrane element is leaking nitrogen. The two methods are then used together to determine the sealing performance of the adhesive, ensuring accurate test results.

[0015] 2. By setting up a UV lamp source and an observation port, an additional method for judging the sealing performance is added, that is, the sealing performance can be judged by visual inspection, monitoring the holding pressure, and detecting nitrogen leakage.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Additional aspects and advantages of this utility model will become apparent and readily understood from the description of the technical solution in conjunction with the following drawings, wherein: Figure 1 This is a schematic diagram of the sealing performance testing device of this utility model. Figure 2 Flowchart of the sealing test device; Figure 3 This is a schematic diagram of the reverse osmosis membrane when it is not wound onto the central tube. Figure 4 This is a top view of the component under test.

[0018] Reference numerals: Sealed housing 100, top wall 101, bottom wall 102, side wall 103, air rod 110, UV lamp source 120, observation port 130, camera 140, nitrogen detector 200, gas supply mechanism 300, pipe 310, pressure relief pipe 311, pressure relief switch 312, booster pump 320, nitrogen cylinder 330, gas pressure and flow regulating component 340, digital display pressure regulating valve 341, gas flow meter 342, pressure stabilizing tank 350, element under test 400, central tube 500, reverse osmosis membrane 510, leakage point 520, glued structure 530. Detailed Implementation

[0019] The technical solution of this utility model is described in detail below. Examples of the technical solution are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The technical solution described below with reference to the accompanying drawings is exemplary and is only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] Reference Figure 1As shown, the sealing detection device provided in the embodiment of this utility model includes a sealing housing 100, a detection element, and a gas supply mechanism 300. A gas rod 110 is installed inside the sealing housing 100. The detection element includes a nitrogen detector 200 installed inside the sealing housing 100 and an alarm (not shown) electrically connected to the nitrogen detector 200. The gas supply mechanism 300 includes a pipe 310, a booster pump 320, a nitrogen cylinder 330, and a gas pressure and flow regulating component 340. One end of the pipe 310 is connected to the nitrogen cylinder 330. The gas rod 110 is connected to the pipe 310. The booster pump 320 and the gas pressure and flow regulating component 340 are both located on the pipe 310. The gas pressure and flow regulating component 340 is located between the gas rod 110 and the booster pump 320. The gas pressure and flow regulating component 340 has a display screen (not shown) for displaying gas pressure.

[0024] By setting up a sealed enclosure 100, a nitrogen detector 200, an alarm, and a gas supply mechanism 300, the sealing performance of the adhesive on the reverse osmosis membrane element can be detected by monitoring the pressure holding pressure, and the sealing performance of the adhesive can also be determined by detecting whether the reverse osmosis membrane element is leaking nitrogen. By combining these two methods, the sealing performance of the adhesive can be determined, ensuring accurate test results.

[0025] Before testing, fix the test element 400 (reverse osmosis membrane element) to the air rod 110 so that the inside of the air rod 110 is connected to the central tube of the reverse osmosis membrane element. Specifically, before installing the reverse osmosis membrane element, the sealing ring at the central tube of the reverse osmosis membrane element can be cleaned to ensure that there are no impurities or glue residues. During testing, such as Figure 1 As shown, the booster pump 320 is started according to actual needs, and the gas pressure and flow regulating component 340 is adjusted so that the booster pump 320 delivers nitrogen from the nitrogen cylinder 330 to the reverse osmosis membrane element through the pipeline 310. At the same time, the pressure holding pressure is maintained at 0.05-0.3MPa, and the pressure holding time is set to 10-20s. Pressure data is obtained in real time through the display screen during the pressure holding period. If the pressure value drops by more than 10% (e.g., if the setting is 0.1MPa, it drops to ≤0.09MPa), the reverse osmosis membrane element is leaking. At the same time, the nitrogen detector 200 detects the nitrogen inside the sealed box 100. If the nitrogen detector 200 detects that the nitrogen concentration inside the sealed box 100 has increased by 1% or more compared to the initial value, it is determined that the reverse osmosis membrane element is leaking. At this time, the nitrogen detector 200 will feed the information back to the alarm device. The alarm device will remind the staff that the reverse osmosis membrane element is leaking. The higher the leakage concentration, the more leak points there are and the larger the leak openings are. If both the pressure test and the nitrogen test are normal, it means that the reverse osmosis membrane element is not leaking.

[0026] Understandably, the nitrogen detector 200 triggers an alarm when the detected value rises by more than 1% compared to the ambient background value. Therefore, the sealed enclosure 100 does not need to be evacuated; the device under test 400 can simply be placed inside the sealed enclosure 100 as normal.

[0027] Specifically, the warning device can be installed inside or outside the sealed enclosure 100, and the warning device can be a light or a speaker.

[0028] Furthermore, such as Figure 1 As shown, the gas supply mechanism 300 also includes a pressure stabilizing tank 350, which is installed on the pipeline 310 and located between the gas pressure and flow regulating component 340 and the booster pump 320.

[0029] By incorporating a pressure-stabilizing tank 350, gas pressure fluctuations can be avoided, ensuring accurate acquisition of pressure data.

[0030] Specifically, the gas supply mechanism 300 is installed outside the sealed housing 100.

[0031] Furthermore, such as Figure 1 As shown, the gas pressure and flow regulating assembly 340 includes a digital display pressure regulating valve 341 and a gas flow meter 342 arranged sequentially along the gas conveying direction of the pipeline 310, with the display screen located on the digital display pressure regulating valve 341.

[0032] The digital pressure regulating valve 341 and the gas flow meter 342 are equipped with a display screen to facilitate the real-time acquisition of pressure data by the staff.

[0033] Furthermore, such as Figure 1 As shown, the other end of the pipe 310 is connected to a pressure relief pipe 311. The connection between the air rod 110 and the pipe 310 is located between the two ends of the pipe 310. A pressure relief switch 312 is installed on the pressure relief pipe 311.

[0034] With the pressure relief pipe 311 and pressure relief switch 312 provided, when the device needs to relieve pressure, simply open the pressure relief switch 312, and the nitrogen in the pipe 310 will be discharged through the pressure relief pipe 311.

[0035] Furthermore, such as Figure 1 As shown, the air rod 110 is set vertically, and UV lamps 120 are installed on the top wall 101 and bottom wall 102 inside the sealed box 100. The sealed housing 100 has an observation port 130 that allows observation of the end (α) of the component under test 400.

[0036] By incorporating a UV lamp source 120 and an observation port 130, an additional method for judging the sealing performance is provided, namely, the sealing performance can be judged by combining visual inspection, monitoring of the holding pressure, and detection of nitrogen leakage.

[0037] During testing, because the reverse osmosis membrane 510 and other structures are wound around the central tube 500 and covered with blue tape on the entire circumference, there will be no leakage on the side of the element under test 400. The leakage will only occur on the end face of the element under test 400, which will be observed by the operator through the observation port 130. The UV lamp source 120 illuminates the element under test 400 from top to bottom, and the operator will see fluorescence on the end face. When the adhesive is defective, such as having gaps or uneven distribution, the fluorescence on the end face will be weak. If the operator finds weak points in the fluorescence during the observation of the end face, they can determine the location of the leak based on this phenomenon.

[0038] It is understandable that, since the element under test 400 is a reverse osmosis membrane element, which includes a central tube 500 and a reverse osmosis membrane sheet 510, as... Figure 3 As shown, when the reverse osmosis membrane 510 is not wound onto the central tube 500, the upper, lower, and right sides of the reverse osmosis membrane 510 are coated with an adhesive structure 530; as Figure 4 As shown, after the reverse osmosis membrane 510 is wound around the central tube 500, when the reverse osmosis membrane element is viewed from the axial direction of the central tube 500, there is glue between the two adjacent layers. When the glue is missing or uneven, a leakage point 520 will appear between the two adjacent layers. The staff can find the leakage point 520 by observing the end face of the element under test 400 through the observation port 130.

[0039] Furthermore, such as Figure 1 As shown, cameras 140 are installed on both the top wall 101 and the bottom wall 102.

[0040] By setting up a camera 140, when a leak is detected by visual inspection, monitoring of holding pressure, or detection of nitrogen leakage, the camera 140 can capture an image of the end of the component under test 400 (the upper or lower end of the component under test 400). The leak location can be found through the image. That is, even if the product has been determined to be unqualified, the leak location can be found through the image.

[0041] like Figure 2 As shown, when the device is holding pressure, the three detection methods can be performed simultaneously: Nitrogen pressure holding pressure: Pressure data is obtained in real time through the display screen. If the pressure value drops by more than 10% (e.g., if the setting is 0.1MPa and it drops to ≤0.09MPa), there is a leak in the reverse osmosis membrane element. Nitrogen concentration detection: Nitrogen detector 200 detects nitrogen inside the sealed chamber 100. If nitrogen detector 200 detects that the nitrogen concentration inside the sealed chamber 100 has increased by 1% or more compared to the initial value, it is determined that there is a leak in the reverse osmosis membrane element. Visual inspection: Observe the end face of the element under test 400 through the observation port 130. If a weak point in fluorescence is found, there is a leak in the reverse osmosis membrane element. If a leak is detected by one of the three tests, the test is repeated to confirm the leak. If a leak is confirmed, the camera 140 is turned on to take an image of the end of the component under test 400 and the leak location is found by taking an image of the end of the component under test 400. If all three tests confirm a leak, the leak is directly determined.

[0042] It is conceivable that the sealing test device could also be used in other industries that use adhesive bonding and require testing the sealing performance of the adhesive.

[0043] Furthermore, such as Figure 1 As shown, two UV lamp sources 120 are installed on both the top wall 101 and the bottom wall 102, and a camera 140 is arranged between the two UV lamp sources 120.

[0044] Ensure accurate visual inspection and accurate 140° camera shooting to guarantee the accuracy of the detection.

[0045] Furthermore, such as Figure 1 As shown, the observation port 130 is located on the top wall 101, which facilitates observation of the end of the component under test 400.

[0046] Furthermore, such as Figure 1 As shown, the nitrogen detector 200 is located on the side wall 103 of the sealed housing 100, so that the nitrogen detector 200 does not occupy the positions of the bottom wall 102 and the top wall 101.

[0047] Furthermore, such as Figure 1 As shown, multiple air rods 110 are installed inside the sealed housing 100. The multiple air rods 110 are spaced apart to enable the detection of multiple reverse osmosis membrane elements.

[0048] Although the technical solutions of this utility model have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these technical solutions without departing from the principles and spirit of this utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A sealing performance testing device, characterized in that, include: A sealed enclosure, in which an air rod is installed, and the component to be tested is mounted on the air rod; The detection element includes a nitrogen detector installed inside the sealed enclosure and an alarm electrically connected to the nitrogen detector; A gas supply mechanism includes a pipeline, a booster pump, a nitrogen cylinder, and a gas pressure and flow regulating component. One end of the pipeline is connected to the nitrogen cylinder, and the gas rod is connected to the pipeline. The booster pump and the gas pressure and flow regulating component are both located on the pipeline. The gas pressure and flow regulating component is located between the gas rod and the booster pump, and the gas pressure and flow regulating component has a display screen for displaying gas pressure.

2. The sealing performance testing device according to claim 1, characterized in that: The gas supply mechanism also includes a pressure stabilizing tank, which is installed on the pipeline and located between the gas pressure and flow regulating component and the booster pump.

3. The sealing performance testing device according to claim 1 or 2, characterized in that: The gas pressure and flow regulating assembly includes a digital display pressure regulating valve and a gas flow meter arranged sequentially along the gas delivery direction of the pipeline, and the display screen is located on the digital display pressure regulating valve.

4. The sealing performance testing device according to claim 1, characterized in that: The other end of the pipe is connected to a pressure relief pipe, the connection between the air rod and the pipe is located between the two ends of the pipe, and a pressure relief switch is installed on the pressure relief pipe.

5. The sealing performance testing device according to claim 1, characterized in that: The air rod is vertically arranged, and UV lamps are installed on the top and bottom walls of the sealed box. The sealed enclosure has an observation port that allows observation of the end of the component under test.

6. The sealing performance testing device according to claim 5, characterized in that: Cameras are installed on both the top wall and the bottom wall.

7. The sealing performance testing device according to claim 6, characterized in that: Both the top wall and the bottom wall are equipped with two UV lamp sources, and a camera is disposed between the two UV lamp sources.

8. The sealing performance testing device according to claim 5, characterized in that: The observation port is located on the top wall.

9. The sealing performance testing device according to claim 8, characterized in that: The nitrogen detector is located on the side wall of the sealed enclosure.

10. The sealing performance testing device according to claim 1, characterized in that: The sealed box contains multiple air rods, which are spaced apart.

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