Diaphragm testing device and diaphragm testing method

Abstract

This application discloses a diaphragm testing device and a diaphragm inspection method. The diaphragm testing device includes: a first cover plate and a second cover plate disposed opposite to each other, forming an installation space between the first and second cover plates for clamping an annular diaphragm to be tested; a sealing gasket disposed on the first cover plate for pressing the circumferential edge of the diaphragm to be tested against the second cover plate, and sealing the diaphragm between the first and second cover plates via the sealing gasket; a pressure application component disposed at the central hole of the diaphragm to be tested for pressing the diaphragm to be tested against the first cover plate; and fasteners for fastening the first and second cover plates together. Multiple pressure input ports are spaced apart from the center to the edge on the first and / or second cover plates, and these pressure input ports are used to introduce pressure during pressure testing of the diaphragm to be tested. This device can adapt to the testing of diaphragms of different sizes, achieving unified diaphragm testing and improving the economy of diaphragm testing.

Description

Technical Field

[0001] This application relates to the field of membrane inspection, and more particularly to a membrane inspection device and a membrane inspection method. Background Technology

[0002] A diaphragm is a circular, elastic, and sensitive element. When different pressures (or forces) are applied to both sides of the diaphragm, the diaphragm will strain and shift towards the side with lower pressure, causing a displacement at its center that is proportional to the pressure difference. With advancements in society and industry, and the continuous development of high-pressure and large-scale equipment, diaphragms, as the core component for pressure conversion, are also undergoing constant updates and development. Therefore, the demand for diaphragm testing is constantly increasing.

[0003] Currently, different testing methods are generally required for membranes of different sizes. This lack of standardized testing methods for different membrane sizes increases the cost of membrane testing and makes it impossible to perform a unified, time-saving, and efficient membrane inspection. Summary of the Invention

[0004] In view of this, embodiments of this application provide a membrane detection device and a membrane detection method, which can effectively detect the quality of membranes of different sizes, thereby improving the efficiency and operability of membrane detection.

[0005] The technical solution of this application embodiment is implemented as follows:

[0006] This application provides a membrane detection device, including:

[0007] A first cover plate and a second cover plate are arranged opposite to each other, and an installation space for clamping a circular membrane to be tested is formed between the first cover plate and the second cover plate.

[0008] A sealing gasket is disposed on the first cover plate to abut the circumferential edge of the membrane to be tested against the second cover plate, and the membrane to be tested is sealed between the first cover plate and the second cover plate by the sealing gasket.

[0009] A pressure-applying component is disposed at the center hole of the diaphragm to be tested, for pressing the diaphragm to be tested onto the first cover plate;

[0010] Fasteners for securing the first cover plate and the second cover plate together;

[0011] The first cover plate and / or the second cover plate are provided with a plurality of pressure input ports spaced apart from the center to the edge, and the pressure input ports are used to introduce pressure when the diaphragm to be tested is subjected to pressure testing.

[0012] In some embodiments, the first cover plate and the second cover plate are provided with a pair of fixing holes around their peripheries. The fasteners include studs and nuts. The studs pass through the pair of fixing holes on the first cover plate and the second cover plate and are then fastened to the nuts.

[0013] In some embodiments, the sealing gasket includes multiple models corresponding to different sizes of the diaphragm to be tested, wherein the inner diameter of each model of the sealing gasket is determined according to the outer diameter of the corresponding diaphragm to be tested, and the inner diameter of the sealing gasket is smaller than the outer diameter of the corresponding diaphragm to be tested.

[0014] In some embodiments, a positioning hole is formed in the first cover plate, and the pressure application component includes:

[0015] A disc with a through hole at its center, the disc being disposed on the membrane to be tested and the through hole being aligned with the center hole of the membrane to be tested;

[0016] A bolt, which passes through the through hole, i.e. the central hole, and engages with the positioning hole to press the diaphragm to be tested onto the first cover plate.

[0017] In some embodiments, the membrane detection device further includes:

[0018] A pressure input device for applying pressure to the diaphragm to be tested within the mounting space via one of the plurality of pressure input ports.

[0019] In some embodiments, the pressure input device includes:

[0020] A liquid storage tank, wherein a pressure output port is provided on the liquid storage tank;

[0021] A pipe, the first end of which is connected to the pressure input port, and the second end of which is connected to one of the plurality of pressure input ports.

[0022] In some embodiments, the pressure input device further includes:

[0023] A first valve, located on the pipeline, is used to release pressure and liquid from the storage tank into the pipeline;

[0024] A second valve, located on the pipeline, is used to release pressure within the pipeline.

[0025] In some embodiments, the membrane detection device further includes:

[0026] A sealing element, connected to the pressure input port, is used to seal the corresponding pressure input port;

[0027] A pressure gauge is installed on the pipeline and is used to detect the pressure of the liquid inside the pipeline.

[0028] This application embodiment also provides a method for detecting diaphragms based on a diaphragm detection device. The device includes: a first cover plate, a second cover plate, a disc, bolts, sealing washers, studs, nuts, a liquid storage tank, pipes, a first valve, a second valve, a seal, and a pressure gauge. The first cover plate has multiple pressure input ports spaced apart from its center to its edge. The first and second cover plates have paired fixing holes around their peripheries. The sealing washers include various models corresponding to different sizes of the diaphragms to be tested. The first cover plate has positioning holes, and the disc has a through hole at its center. The method includes the following steps:

[0029] Select the sealing gasket according to the size of the diaphragm to be tested;

[0030] Place the sealing gasket on the first cover plate, and then install the diaphragm to be tested on the sealing gasket, with the center hole of the diaphragm to be tested aligned with the positioning hole of the first cover plate;

[0031] The bolt, through the through hole of the disc and in conjunction with the positioning hole of the first cover plate, presses the diaphragm to be tested onto the first cover plate.

[0032] The stud passes through the paired fixing holes on the first cover plate and the second cover plate and is then fastened to the nut.

[0033] Connect the first end of the pipe to the pressure input port on the liquid storage tank, select one of the multiple pressure input ports according to the size of the diaphragm to be tested and connect it to the second end of the pipe, and seal the remaining pressure input ports with the sealing element;

[0034] Open the first valve to release the pressure and liquid in the storage tank into the pipeline. The pipeline then delivers pressure through the pressure inlet to the sealed space formed between the first cover plate, the second cover plate, the sealing gasket, and the diaphragm to be tested.

[0035] A pressure gauge is located on the pipeline to detect the liquid pressure inside the pipeline.

[0036] In some embodiments, the method further includes the following steps:

[0037] After the inspection is completed, open the second valve to release the pressure in the pipeline;

[0038] Remove the nut and the stud to separate the first cover plate and the second cover plate;

[0039] Remove the bolts and take out the disc, the sealing gasket, and the diaphragm to be tested;

[0040] Disconnect the pipe from the pressure input port to complete the disassembly.

[0041] This application provides a diaphragm testing device, comprising: a first cover plate and a second cover plate disposed opposite to each other, forming an installation space between the first cover plate and the second cover plate for clamping an annular diaphragm to be tested; a sealing gasket disposed on the first cover plate for abutting the circumferential edge of the diaphragm to be tested against the second cover plate, and sealing the diaphragm to be tested between the first cover plate and the second cover plate by the sealing gasket; a pressure applying component disposed at the central hole of the diaphragm to be tested for pressing the diaphragm to be tested against the first cover plate; and fasteners for fastening the first cover plate and the second cover plate together; wherein, a plurality of pressure input ports are spaced apart from the center to the edge on the first cover plate and / or the second cover plate, and the pressure input ports are used to introduce pressure when the diaphragm to be tested is subjected to pressure testing. Thus, by pressing the diaphragm to be tested onto the first cover plate using a pressure-applying component, and by abutting the circumferential edge of the diaphragm to the second cover plate with a sealing gasket, the diaphragm and the sealing gasket are fixed between the first and second cover plates using fasteners, ensuring their positions are fixed. This forms a sealed cavity with the first and second cover plates, the sealing gasket, and the diaphragm, providing a sealed testing environment for subsequent diaphragm testing. The first or second cover plate has at least one pressure input port from its center to its edge, enabling the testing of diaphragms of different sizes and types. This unifies the diaphragm testing method, significantly reducing costs, improving operability and measurement efficiency, and facilitating widespread use. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of the membrane detection device according to an embodiment of this application;

[0043] Figure 2 This is a schematic diagram of the process of installing the diaphragm to be tested and performing a pressure test on the diaphragm testing device according to an embodiment of this application;

[0044] Figure 3 This is a schematic diagram of the process for disassembling the diaphragm corresponding to the diaphragm detection device in the embodiments of this application.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. First cover plate;

[0047] 2. Second cover plate;

[0048] 3. Sealing gaskets;

[0049] 4. Pressure application assembly; 41. Disc; 42. Bolt; 43. First flat washer;

[0050] 5. Fasteners; 51. Studs; 52. Nuts; 53. Second flat washers;

[0051] 6. Pressure input device; 61. Liquid storage tank; 62. Piping;

[0052] 63. First valve; 64. Second valve; 65. Pipe fitting;

[0053] 7. Seals;

[0054] 8. Pressure gauge;

[0055] 9. The membrane to be tested. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on this application. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] In the description of this application, references are made to "some embodiments," which describe a subset of all possible embodiments. However, it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0058] In the description of this application, the terms "first," "second," etc., are used merely to distinguish similar objects and do not represent a specific ordering of the objects. It is understood that "first," "second," etc., may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein. Unless otherwise stated, "a plurality of" means at least two.

[0059] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0060] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0061] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0062] This application provides a diaphragm inspection device, such as... Figure 1 As shown, the diaphragm inspection device includes: a first cover plate 1 and a second cover plate 2 arranged opposite to each other, a sealing gasket 3, a pressure application component 4, and a fastener 5.

[0063] The first cover plate 1 and the second cover plate 2 are arranged opposite to each other, and an installation space is formed between the first cover plate 1 and the second cover plate 2 for clamping and holding the annular membrane 9 to be tested.

[0064] Here, the shapes of the first cover plate 1 and the second cover plate 2 are not limited, and include, but are not limited to, at least one of the following: circular, rectangular, and rhomboid. The areas of both the first cover plate 1 and the second cover plate 2 are larger than the area of ​​the diaphragm 9 to be tested to ensure that the diaphragm 9 to be tested can be clamped in the mounting space formed between the first cover plate 1 and the second cover plate 2.

[0065] A sealing gasket 3 is disposed on the first cover plate 1 to abut the circumferential edge of the diaphragm 9 to be tested against the second cover plate 2, and the diaphragm 9 to be tested is sealed between the first cover plate 1 and the second cover plate 2 by the sealing gasket 3.

[0066] Here, the sealing gasket can be made of paper, rubber, or copper sheet. It is placed between two planes to enhance the sealing ability. To prevent leakage, it is placed between the static sealing surfaces as a sealing element. The selection of a good sealing gasket depends on the requirements and conditions of the working conditions. The general order of selecting sealing gasket materials is rubber-copper-alloy steel. When performing pressure resistance testing on the diaphragm, the ultimate pressure of the sealing gasket needs to be considered when selecting it. The sealing gasket 3 is annular, which allows the entire circumferential edge of the annular diaphragm 9 to be tested to abut against the second cover plate 2, facilitating the formation of a pressure input space between the edge and center of the diaphragm 9. Simultaneously, the sealing gasket 3, together with the first cover plate 1, the second cover plate 2, and the diaphragm 9, forms a sealed cavity, ensuring the airtightness of the testing environment and facilitating subsequent pressure resistance testing of the diaphragm.

[0067] The pressure application component 4 is located at the center hole of the diaphragm 9 to be tested, and is used to press the diaphragm 9 to be tested onto the first cover plate 1.

[0068] Here, the pressure-applying component 4 is used to seal the center hole of the diaphragm 9 to be tested and to fix it on the first cover plate 1 to prevent the center of the diaphragm from moving. And by fixing the center of the diaphragm 9 to be tested on the first cover plate 1, and with the edge of the diaphragm abutting against the second cover plate 2, a space for pressure input is formed.

[0069] Fastener 5 is used to securely connect the first cover plate 1 and the second cover plate 2.

[0070] The first cover plate 1 and / or the second cover plate 2 are provided with multiple pressure input ports at intervals from the center to the edge. The pressure input ports are used to introduce pressure when the diaphragm 9 to be tested is subjected to pressure testing.

[0071] Here, when testing the diaphragm, pressure needs to be applied to the diaphragm. In order to ensure that the diaphragm remains fixed and sealed when pressure is applied, the first cover plate 1 and the second cover plate 2 are fastened with fasteners 5. In this way, the sealing gasket 3 between the first cover plate 1 and the second cover plate 2 and the edge of the diaphragm 9 to be tested are fixed at the same time, which improves the pressure resistance and airtightness of the sealed cavity and avoids the problem of diaphragm testing failure due to excessive pressure.

[0072] Here, the arrangement of multiple pressure input ports can accommodate various sizes of diaphragms 9 to be tested. Therefore, the multiple pressure input ports should be located on the annular portion of the diaphragm 9 to be tested. Generally, the smaller the diaphragm size, the closer the pressure input port should be to the center of the diaphragm 9 to be tested. The larger the diaphragm size and the larger the radius, the closer the pressure input port can be to the edge of the diaphragm 9 to be tested.

[0073] In this way, the pressure-applying component 4 presses the diaphragm to be tested onto the first cover plate 1, and the sealing gasket 3 abuts the circumferential edge of the diaphragm to be tested onto the second cover plate 2. Fasteners 5 secure the diaphragm to be tested 9 and the sealing gasket 3 between the first cover plate 1 and the second cover plate 2, ensuring the fixed positions of the sealing gasket 4 and the diaphragm to be tested 9, thus forming a sealed cavity consisting of the first cover plate 1, the second cover plate 2, the sealing gasket 3, and the diaphragm to be tested 9. The first cover plate 1 or the second cover plate 2 has at least one pressure input port from the center to the edge, which can accommodate the testing of diaphragm quality of different sizes and types, achieving a unified diaphragm testing method, greatly saving costs, improving operability and measurement efficiency, and facilitating widespread use.

[0074] In some embodiments, the first cover plate 1 and the second cover plate 2 are provided with paired fixing holes around their peripheries. The fastener 5 includes a stud 51 and a nut 52, the stud 51 passing through the paired fixing holes on the first cover plate 1 and the second cover plate 2 and being fastened to the nut 52. In some embodiments, the fastener 5 includes a second flat washer 53, located between the stud 51 and the nut 52. Due to material and manufacturing limitations of threaded fasteners, fasteners such as bolts 42 have small bearing surfaces and generally use flat washers to reduce compressive stress on the bearing surface and protect the surface of the connected parts. Flat washers are typically thin pieces of various shapes used to reduce friction, prevent leakage, isolate, prevent loosening, or distribute pressure.

[0075] In some embodiments, the sealing gasket 3 includes multiple models corresponding to different sizes of the diaphragm 9 to be tested. The inner diameter of each model of sealing gasket 3 is determined based on the outer diameter of the corresponding diaphragm 9 to be tested, and the inner diameter of the sealing gasket 3 is smaller than the outer diameter of the corresponding diaphragm 9 to be tested. Thus, a corresponding model of sealing gasket 3 is selected based on the different sizes of the diaphragm 9 to be tested. The inner diameter of the sealing gasket 3 must be smaller than the outer diameter of the corresponding diaphragm 9 to be tested, so that the sealing gasket 3 can overlap with the diaphragm 9 to be tested. This allows the circumferential edge of the diaphragm 9 to be tested to abut against the second cover plate 2, fixing the edge of the diaphragm 9 to be tested and preventing edge movement. Simultaneously, it can form a sealed cavity with the diaphragm 9 of different sizes, the first cover plate 1, and the second cover plate 2, providing a stable testing environment for subsequent diaphragm testing.

[0076] In some embodiments, a positioning hole is formed on the first cover plate 1, and the pressure application component 4 includes:

[0077] A through hole is formed in the center of the disc 41, which is used to mount the diaphragm 9 to be tested, with the through hole aligned with the center hole of the diaphragm 9. A bolt 42 passes through the through hole and the center hole and engages with the positioning hole to press the diaphragm 9 to be tested onto the first cover plate 1. In some embodiments, the pressure application assembly further includes a first flat washer 43, which is located between the bolt 42 and the disc 42 to reduce the compressive stress on the disc and protect the surface of the diaphragm 9 to be tested. By fixing the center of the diaphragm 9 to be tested in the middle between the first cover plate 1 and the disc 41, uneven force on the center of the diaphragm is avoided when pressure is applied to the diaphragm through the pressure input port on the first cover plate, preventing inaccurate test results due to the diaphragm not being fixed.

[0078] In some embodiments, the diaphragm testing device further includes a pressure input device 6 for applying pressure to the diaphragm 9 to be tested within the mounting space via one of a plurality of pressure input ports.

[0079] Here, the pressure input device 6 is based on Pascal's principle. According to Pascal's law, when an external force causes a pressure increase at any point in a static fluid, this pressure increase is instantly transmitted to all points in the static fluid. Therefore, the pressure input device can provide a consistent pressure output to the diaphragm 9 under test, which is beneficial for simulating the real working environment of the diaphragm. It is simple to operate, effectively detects the quality of different diaphragms, improves the safety of applicable working conditions, ensures the accuracy of diaphragm detection, and has a lower possibility of leakage compared to pneumatic systems. The pressure input device here is connected to an external pressurization device.

[0080] In some embodiments, the pressure input device 6 includes: a liquid storage tank 61 with a pressure output port; and a pipe 62, the first end of which is connected to the pressure input port and the second end of which is connected to one of a plurality of pressure input ports.

[0081] Here, pipe 62 can be connected to the pressure input port via pipe fitting 65.

[0082] In some embodiments, the pressure input device 6 further includes: a first valve 63 located on the pipe 62 for releasing pressure and liquid in the storage tank 61 into the pipe 62; and a second valve 64 located on the pipe 62 for releasing pressure in the pipe 62.

[0083] Here, the material selection order for valves is generally cast iron - carbon steel - stainless steel. A reasonable selection of valve material can achieve the most economical and longest service life. Common valve-to-pipe connections are threaded connections and flange connections. Threaded valves are typically for valves with a nominal diameter of 50mm or less. If the diameter is too large, installation and sealing of the connection become very difficult. Flange valves are easier to install and disassemble, but they are heavier and more expensive than threaded valves. They are suitable for pipe connections of various diameters and pressures. The pressure input and output of the diaphragm detection device are controlled by the first valve 63 and the second valve 64 on the pipeline. The first valve 63, relative to the second valve 64, can be located on the pipeline 62 on the side of the storage tank 61 to control the pressure in the storage tank 61 and the liquid flow into the pipeline 62. The second valve 64, relative to the first valve 63, is located on the pipeline 62 on the pressure input side to release the pressure within the pipeline 62.

[0084] In some embodiments, the diaphragm detection device further includes: a sealing element 7, connected to a pressure input port, for sealing the corresponding pressure input port;

[0085] Pressure gauge 8 is installed on pipe 62 and is used to detect the pressure of the liquid inside pipe 62.

[0086] Here, after selecting the pressure input port for the pipeline connection according to the size of the diaphragm, in order to ensure the airtightness of the diaphragm detection space, other corresponding pressure input ports can be sealed by the sealing element 7, which can be a threaded plug.

[0087] Here, the selection of the pressure gauge 8 depends on the properties of the medium being measured. The pressure gauge 8 includes, but is not limited to, ordinary pressure gauges, vacuum pressure gauges, shockproof pressure gauges, oxygen pressure gauges, and corrosion-resistant pressure gauges. When measuring the pressure of liquid media, ordinary pressure gauges are often chosen for slow pressure changes, while shockproof pressure gauges are often chosen for large pressure fluctuations. Ordinary pressure gauges are generally used for diaphragm testing. According to Pascal's principle, the pressure value inside pipe 62 is the same as the pressure inside the diaphragm testing device. The pressure gauge 8 can be installed on the first valve 63. By detecting the pressure inside pipe 62, the pressure inside the diaphragm device can be detected. The change in the pointer on the pressure gauge 8 represents the change in pressure inside the diaphragm testing device.

[0088] This application also provides a diaphragm detection method based on a diaphragm detection device. The diaphragm detection device includes: a first cover plate, a second cover plate, a disc, bolts, sealing washers, studs, nuts, a liquid storage tank, pipes, a first valve, a second valve, seals, and a pressure gauge. The first cover plate has multiple pressure input ports spaced apart from its center to its edge. The first and second cover plates have paired fixing holes around their peripheries. The sealing washers include various models corresponding to different sizes of diaphragms to be tested. The first cover plate has positioning holes, and the disc has a through hole at its center.

[0089] like Figure 2 As shown, the membrane detection method includes the following steps:

[0090] Step 210: Select a sealing gasket according to the size of the diaphragm to be tested.

[0091] Here, the larger the size of the diaphragm to be tested, the larger the inner diameter of the sealing gasket 3 should be. At the same time, the inner diameter of the sealing gasket 3 should be smaller than the outer diameter of the diaphragm to be tested. The sealing gasket 3 only needs to be able to press against the edge of the diaphragm 9 to be tested.

[0092] Step 220: Place the sealing gasket on the first cover plate, and then install the diaphragm to be tested on the sealing gasket, aligning the center hole of the diaphragm to be tested with the positioning hole of the first cover plate.

[0093] Step 230: The bolts, through the through holes and center holes of the disc, engage with the positioning holes of the first cover plate to press the diaphragm to be tested onto the first cover plate; the studs, after passing through the paired fixing holes on the first and second cover plates, are tightened with the nuts.

[0094] Here, the size of the positioning hole of the first cover plate 1 should be consistent with the central hole of the diaphragm 9 to be tested and the through hole of the disc 41, so as to ensure that the bolt can fix the diaphragm 9 to be tested on the first cover plate 1 through the through hole of the disc 41, the positioning hole of the first cover plate 1 and the central hole of the diaphragm 9 to be tested.

[0095] Step 240: Connect the first end of the pipeline to the pressure input port on the liquid storage tank. Select one of the multiple pressure input ports according to the size of the diaphragm to be tested and connect it to the second end of the pipeline. The remaining pressure input ports are sealed by the sealing element.

[0096] Step 250: Open the first valve to release the pressure and liquid in the storage tank into the pipeline. The pipeline delivers pressure through the pressure inlet to the sealed space formed between the first cover plate, the second cover plate, the sealing gasket, and the diaphragm to be tested.

[0097] Here, the pressure value in the reservoir is set according to the pressure resistance limit of the diaphragm being tested or the user's requirements. Different diaphragms have different pressure resistance values. For example, a 0.15mm thick polyethylene terephthalate (PET) diaphragm has a burst pressure of 0.16MPa; a solenoid valve diaphragm has a pressure of 0.7MPa; and a PET / PBT blend diaphragm has a pressure of 0.24MPa. The pressure in the reservoir can also be set by the user according to their specific testing needs.

[0098] Step 260: The pressure gauge is located on the pipeline to detect the liquid pressure inside the pipeline.

[0099] Here, a set pressure value is applied to the diaphragm 9 to be tested, and the quality of the diaphragm is judged by comparing the pressure value on the pressure gauge 8 with the set pressure resistance range limit. If it is not within the pressure resistance range, the diaphragm is unqualified; if it is within the range, the diaphragm is qualified.

[0100] Here, the pressure resistance of the diaphragm 9 can also be determined by applying pressure to the pressure limit or a user-defined pressure value, maintaining the pressure limit for a period of time, and observing the change in pressure on the pressure gauge 8. If the change in pressure on the pressure gauge 8 does not meet the required range, the diaphragm's pressure resistance is insufficient; if the change in pressure on the pressure gauge 8 meets the required range, the diaphragm's pressure resistance meets the requirements and it can be put into use. The holding time can be set based on experience or the user's testing requirements. Simultaneously, a timer can be used to record the holding time, resulting in a high degree of automation, high operability, and ease of widespread application.

[0101] Understandably, after testing the diaphragm, it is necessary to disassemble it, such as... Figure 3 As shown, the membrane detection method further includes the following steps:

[0102] Step 310: After the inspection is completed, open the second valve to release the pressure in the pipeline.

[0103] Step 320: Remove the nuts and studs to separate the first cover plate and the second cover plate.

[0104] Step 330: Remove the bolts, take out the disc, sealing gasket and the diaphragm to be tested.

[0105] Step 340: Disconnect the pipe from the pressure inlet to complete the disassembly.

[0106] In this way, the disassembly of the diaphragm testing device is safe and simple, easy to repeat, reduces the labor intensity of the operator, improves the operability of the inspection process, and helps to improve the efficiency of the disassembly process.

[0107] It should be noted that the technical solutions described in the embodiments of this application can be combined arbitrarily without conflict.

[0108] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A membrane detection device, characterized in that, include: A first cover plate and a second cover plate are arranged opposite to each other, and an installation space for clamping a circular membrane to be tested is formed between the first cover plate and the second cover plate. A sealing gasket is disposed on the first cover plate to abut the circumferential edge of the membrane to be tested against the second cover plate, and the membrane to be tested is sealed between the first cover plate and the second cover plate by the sealing gasket. A pressure-applying component is disposed at the central hole of the membrane to be tested, and is used to press the membrane to be tested onto the first cover plate; the pressure-applying component is used to seal the central hole of the membrane to be tested and fix it on the first cover plate to prevent the center of the membrane to be tested from moving. Fasteners for securing the first cover plate and the second cover plate together; The first cover plate has multiple pressure input ports spaced apart from the center to the edge. The pressure input ports are used to introduce pressure when the diaphragm to be tested is subjected to pressure testing. The multiple pressure input ports can adapt to the testing requirements of diaphragms of various sizes. The sealing gaskets include various models corresponding to different sizes of the diaphragms to be tested. The inner diameter of each model of sealing gasket is determined according to the outer diameter of the corresponding diaphragm to be tested, and the inner diameter of the sealing gasket is smaller than the outer diameter of the corresponding diaphragm to be tested.

2. The membrane detection device according to claim 1, characterized in that, The first cover plate and the second cover plate are provided with a pair of fixing holes around their peripheries. The fasteners include studs and nuts. The studs pass through the pair of fixing holes on the first cover plate and the second cover plate and are fastened to the nuts.

3. The membrane detection device according to claim 1, characterized in that, The first cover plate has a positioning hole, and the pressure application component includes: A disc with a through hole at its center, the disc being disposed on the membrane to be tested and the through hole being aligned with the center hole of the membrane to be tested; A bolt, which passes through the through hole and the center hole and engages with the positioning hole, presses the diaphragm to be tested onto the first cover plate.

4. The membrane detection device according to claim 1, characterized in that, The membrane detection device further includes: A pressure input device for applying pressure to the diaphragm to be tested within the mounting space via one of the plurality of pressure input ports.

5. The membrane detection device according to claim 4, characterized in that, The pressure input device includes: A liquid storage tank, wherein a pressure output port is provided on the liquid storage tank; A pipe, the first end of which is connected to the pressure output port, and the second end of which is connected to one of the plurality of pressure input ports.

6. The membrane detection device according to claim 5, characterized in that, The pressure input device further includes: A first valve, located on the pipeline, is used to release pressure and liquid from the storage tank into the pipeline; A second valve, located on the pipeline, is used to release pressure within the pipeline.

7. The membrane detection device according to claim 5, characterized in that, The membrane detection device further includes: A sealing element, connected to the pressure input port, is used to seal the corresponding pressure input port; A pressure gauge is installed on the pipeline and is used to detect the pressure of the liquid inside the pipeline.

8. A detection method for a membrane based on a membrane detection device, characterized in that, The diaphragm testing device includes: a first cover plate, a second cover plate, a disc, bolts, sealing washers, studs, nuts, a liquid storage tank, pipes, a first valve, a second valve, seals, and a pressure gauge; wherein, the first cover plate has multiple pressure input ports spaced apart from the center to the edge, the first and second cover plates have paired fixing holes around their peripheries, the sealing washers include various models corresponding to different sizes of diaphragms to be tested, the first cover plate has positioning holes, and the disc has a through hole at its center; the method includes the following steps: The sealing gasket is selected according to the size of the diaphragm to be tested; the inner diameter of the selected sealing gasket is determined according to the outer diameter of the diaphragm to be tested, and the inner diameter of the sealing gasket is smaller than the corresponding outer diameter of the diaphragm to be tested; Place the sealing gasket on the first cover plate, and then install the diaphragm to be tested on the sealing gasket, with the center hole of the diaphragm to be tested aligned with the positioning hole of the first cover plate; The bolt, through the through hole and the center hole of the disc, engages with the positioning hole of the first cover plate to press the diaphragm to be tested onto the first cover plate, thereby sealing the center hole of the diaphragm to be tested and fixing it to the first cover plate to prevent the center of the diaphragm to be tested from moving. The stud passes through the paired fixing holes on the first cover plate and the second cover plate and is then fastened to the nut. Connect the first end of the pipe to the pressure input port on the liquid storage tank, select one of the multiple pressure input ports according to the size of the diaphragm to be tested and connect it to the second end of the pipe, and seal the remaining pressure input ports with the sealing element; Open the first valve to release the pressure and liquid in the storage tank into the pipeline. The pipeline then delivers pressure through the pressure inlet to the sealed space formed between the first cover plate, the second cover plate, the sealing gasket, and the diaphragm to be tested. A pressure gauge is located on the pipeline to detect the liquid pressure inside the pipeline.

9. The method for detecting a membrane using the membrane detection device according to claim 8, characterized in that, The method further includes the following steps: After the inspection is completed, open the second valve to release the pressure in the pipeline; Remove the nut and the stud to separate the first cover plate and the second cover plate; Remove the bolts and take out the disc, the sealing gasket, and the diaphragm to be tested; Disconnect the pipe from the pressure input port to complete the disassembly.

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