Device, system and method for testing airtight performance of sealing material

Abstract

The invention relates to the field of material sealing performance testing, in particular to an airtight performance testing device, system and method for a sealing material.The testing device comprises a sealing container and a testing table, an inner cavity of the sealing container comprises a first air chamber and a second air chamber, and the testing table is fixedly installed in the sealing container to separate the first air chamber from the second air chamber; the test bench is provided with a through test seam. A pressurizing pipeline, a pressure relief pipeline and a pressure measuring pipeline are arranged on the sealed container, the pressurizing pipeline and the pressure relief pipeline are both communicated with the first air chamber, and the pressure measuring pipeline is communicated with the second air chamber; the sealing material is arranged on one surface, facing the first air chamber, of the test bed and covers the test seam; the pressurizing pipeline pressurizes the first air chamber to enable the pressure in the first air chamber to be higher than that in the second air chamber. The sealing container can be pressurized and heated to simulate alternately-changed internal pressure and temperature environments in the gas storage chamber, the sealing performance of a sealing material on a test seam can be tested, the permeability of the sealing material can be calculated, and the damage mechanism of the sealing material extruded along the seam can be studied.

Description

Technical Field

[0001] The invention relates to the field of material sealing performance testing, and in particular to an airtight performance testing device, system and method for sealing materials. Background Art

[0002] Compressed air energy storage is a new type of energy storage technology. It uses the energy generated by compressed air during low-peak electricity consumption and uses compressed air to generate electricity during peak electricity consumption to achieve the purpose of energy storage.

[0003] When designing an artificial gas storage cavern for compressed air energy storage, the most important issue is how to ensure sealing. The airtightness of the underground gas storage cavern largely determines the operating efficiency of the compressed air energy storage power station. How to ensure that there is no air leakage in the underground gas storage cavern or to control the air leakage within the allowable value is one of the key issues of compressed air energy storage technology.

[0004] However, as for the research on the long-term airtightness and durability of the sealing structure during operation, as well as the failure mechanism of the sealing structure being squeezed into the surrounding rock along microcracks or construction joints under the action of high-pressure gas, there is currently a lack of relevant test equipment that can effectively simulate the airtightness performance of the sealing structure under actual working conditions. Summary of the invention

[0005] The purpose of the present invention is to overcome the technical problem that the prior art cannot simulate the compressed air conditions in the air storage chamber to test the sealing performance of the sealing structure, and to provide an airtight performance test device, system and method for a sealing material.

[0006] In a first aspect, the present invention provides an airtight performance test device for a sealing material, comprising a sealed container and a test bench, the inner cavity of the sealed container comprising a first air chamber and a second air chamber, the test bench being fixedly installed in the sealed container and separating the first air chamber from the second air chamber, and a through test seam being provided on the test bench; a pressurizing pipeline and a pressure measuring pipeline are provided on the sealed container, the pressurizing pipeline is connected to the first air chamber, and the pressure measuring pipeline is connected to the second air chamber; the sealing material can be arranged on a side of the test bench facing the first air chamber and covering the test seam; the pressurizing pipeline pressurizes the first air chamber so that the pressure in the first air chamber is higher than the pressure in the second air chamber.

[0007] The test bench can divide the space in the sealed container into two air chambers, namely the first air chamber and the second air chamber. The first air chamber can be pressurized through a pressurized pipeline to simulate the alternating internal pressure environment under actual operating conditions in the gas storage chamber, and a pressure difference is formed between the first air chamber and the second air chamber. The sealing performance of the sealing material on the test bench to the test seam can be judged by measuring the pressure change in the second air chamber, and the permeability of the sealing material can also be calculated. After the test, the sealed container can be opened to observe the changing characteristics of the position and shape of the sealing material on the test bench, so as to further study the destruction mechanism of the sealing material extruded along the crack under high pressure. The filling pressure value and the pressure holding time in the first air chamber can be set according to the test requirements.

[0008] Preferably, the sealed container comprises a shell and a cover plate which are fixedly connected, the cover plate seals the opening of the shell, a heater and a thermocouple are arranged on the cover plate, and both the heater and the thermocouple extend through the cover plate into the first air chamber.

[0009] The shell and the cover are detachable and sealed to form a sealed container. A heater is arranged on the cover to simulate the temperature change caused by pressurization in the actual gas storage chamber. The thermocouple can monitor the temperature in the first air chamber and the temperature in the first air chamber can be adjusted at any time through the heater. The sealing material can be subjected to high temperature and high pressure at the same time in the test, and the impact on its sealing performance can restore the actual working conditions in the gas storage chamber.

[0010] Preferably, a first sealing member is provided between the housing and the cover plate.

[0011] Providing a seal between the shell and the cover plate can improve the sealing performance of the sealed container and avoid leakage of the sealed container under high pressure during the test; specifically, the first seal can be a metal winding gasket.

[0012] Preferably, a cooling water pipe is provided in the first air chamber, and both ends of the cooling water pipe pass through the cover plate and extend to the outside of the sealed container.

[0013] Cooling water can be introduced into the cooling water pipe to cool the first air chamber. For example, if the heater heats the first air chamber to a temperature exceeding the preset test temperature, the heating can be stopped and the cooling water in the cooling water pipe can be used to cool the first air chamber until the temperature drops to the preset temperature, and then the test can be carried out.

[0014] Preferably, a cooling valve is provided on the cooling water pipe located outside the sealed container.

[0015] A cooling valve can be set on the cooling water pipe to control the on and off of the cooling water in the cooling water pipe, thereby controlling the cooling process.

[0016] Preferably, a plurality of ribs are provided in the second air chamber, the plate surfaces of the ribs are perpendicular to the table surface of the test bench, and the ribs are used to support the test bench.

[0017] The plurality of ribs arranged in the second air chamber can form a supporting structure to support the test bench, and the test bench can also remain fixed when subjected to the high pressure in the first air chamber.

[0018] Preferably, a plurality of the ribs are arranged crosswise with each other, a pad is provided between the ribs and the test bench, a through hole is opened on the pad, and the through hole is connected with the test seam and the second air chamber; a second seal is provided between the pad and the test bench.

[0019] Multiple ribs can be arranged crosswise with each other, and the ribs can be separated from the test bench by a pad with through holes, so as to avoid the test seam being blocked by the intersection of the ribs, so that the test seam can maintain communication with the second air chamber through the through holes; multiple ribs can also be arranged parallel to each other and at intervals, and the arrangement method and number of the ribs can be selected according to actual needs, and the present invention does not make specific limitations on this.

[0020] Preferably, a pressurizing valve and a first pressure gauge are provided on the pressurizing pipeline, and the first pressure gauge is located downstream of the pressurizing valve; a pressure relief pipeline is also provided on the sealed container, and a pressure relief valve is provided on the pressure relief pipeline; a pressure measuring valve and a second pressure gauge are provided on the pressure measuring pipeline, and the second pressure gauge is located upstream of the pressure measuring valve.

[0021] Pressure gauges are respectively arranged on the pressurizing pipeline and the pressure measuring pipeline, so as to monitor the pressure values ​​in the first air chamber and the second air chamber in real time; a pressure relief pipeline can be separately arranged on the sealed container for pressure relief, or pressurization or pressure relief operations can be performed only through the pressurizing pipeline without setting a pressure relief pipeline; valves are arranged on the pressurizing pipeline, the pressure relief pipeline and the pressure measuring pipeline, so as to adjust the pressures in the first air chamber and the second air chamber.

[0022] In a second aspect, the present invention provides an airtight performance test system for a sealing material, comprising an air source, a control system and an airtight performance test device for the sealing material as described above, wherein the air source is connected to the pressurized pipeline, and the control system can control the on / off of the air source, the pressurized pipeline, the pressure relief pipeline and the pressure measuring pipeline.

[0023] In a third aspect, the present invention provides a method for testing the airtightness performance of a sealing material, using the airtightness performance testing device for the sealing material as described above or the airtightness performance testing system for the sealing material as described above, the testing method comprising: S1: installing the sealing material on the test bench and covering the test seam; S2: installing the test bench in the sealed container so that the side of the test bench equipped with the sealing material faces the first air chamber; S3: sealing the sealed container, and pressurizing the first air chamber to the test pressure through the pressurizing pipeline; S4: maintaining the pressure in the first air chamber at the test pressure, and measuring the pressure change in the second air chamber.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention provides an apparatus, system and method for testing the airtightness performance of a sealing material. The test bench can separate the space in a sealed container into two air chambers, namely, a first air chamber and a second air chamber. The first air chamber can be pressurized and heated through a pressurized pipeline to simulate the alternating internal pressure and temperature environment under operating conditions in an actual gas storage chamber, and a pressure difference is formed between the first air chamber and the second air chamber. The sealing performance of the sealing material on the test bench for a test seam can be judged by measuring the pressure change in the second air chamber, and the permeability of the sealing material can also be calculated. After the test, the sealed container can be opened to observe the changing characteristics of the position, shape and other changes of the sealing material on the test bench, so as to further study the damage mechanism of the sealing material extruded along the crack under high pressure; By controlling the rate and temperature of high-pressure gas injection, a temperature-pressure change curve of the material can be obtained; taking into account the difference in material permeability, the air pressure of the second air chamber will change after the internal pressure is applied. The change in air pressure is used as a basis for judgment to determine the thickness of different sealing materials that meet the permeability coefficient requirements of the sealing layer of the artificial gas storage cavern, which can provide design parameters for the sealing scheme of the artificial gas storage cavern; test seams of different widths are preset on the test bench, and after the sealing material is tightly fitted to the test bench, the sealing characteristics of different materials and the differences in extrusion damage at different seam widths are studied. Through testing and data analysis through the test device system, it is possible to verify the change law of the sealing performance of the sealing material with the seam width, providing technical support for material selection and design optimization of artificial gas storage caverns. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the airtightness performance test device of the sealing material of the present invention.

[0027] Figure 2 The airtightness test device of the sealing material of the present invention is Figure 1 Overall cross-sectional view at “AA” in the figure.

[0028] Figure 3 The airtightness test device of the sealing material of the present invention is Figure 1 Overall cross-sectional view at “BB” in the figure.

[0029] Markings in the figure:

[0030] 1. Sealed container, 11. First air chamber, 12. Second air chamber, 13. Cover plate, 14. Shell, 2. Test bench, 21. Test seam, 3. Pressurization pipeline, 31. Pressurization valve, 32. First pressure gauge, 4. Pressure relief pipeline, 41. Pressure relief valve, 5. Pressure measuring pipeline, 51. Pressure measuring valve, 52. Second pressure gauge, 6. Heater, 61. Electric heating switch, 7. Thermocouple, 8. Cooling water pipe, 81. Cooling valve, 9. Rib plate, 10. Gasket, 101. Through hole, 15. First seal, 16. Second seal, 17. High-strength bolts, 18. Fastening bolts, 19. Sealing material. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0032] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0033] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0034] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0035] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0036] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0037] Example 1

[0038] This embodiment provides a device for testing the airtightness performance of a sealing material.

[0039] Figure 1 It is a structural schematic diagram of the airtightness performance test device of the sealing material of the present invention; Figure 2 The airtightness test device of the sealing material of the present invention is Figure 1 Overall cross-sectional view at "AA" in the figure; Figure 3 The airtightness test device of the sealing material of the present invention is Figure 1 Overall cross-sectional view at “BB” in the figure.

[0040] like Figures 1 to 3 As shown in , the airtight performance test device of the sealing material described in this embodiment may include a sealed container 1 and a test bench 2, the inner cavity of the sealed container 1 includes a first air chamber 11 and a second air chamber 12, the test bench 2 is fixedly installed in the sealed container 1, and separates the first air chamber 11 and the second air chamber 12, that is, the test bench 2 can be arranged between the first air chamber 11 and the second air chamber 12; a through test seam 21 is opened on the test bench 2; and the sealing material 19 can be arranged on the test bench 2 and cover the test seam 21.

[0041] Here, the sealed container 1 can be a cylindrical structure, or a structure with an inner cavity of other shapes. The sealed container 1 can be open or closed. The test bench 2 can be a plate-like structure that is compatible with the inner cavity of the sealed container 1 or smaller in size than the inner cavity of the sealed container 1, and can be installed in the sealed container 1 in a detachable manner; the test seam 21 can run through both sides of the test bench 2, and the length and width of the test seam 21 can be selected according to the test needs, but must be smaller than the size of the sealing material 19 set on the test bench 2; the sealing material 19 can be a rigid sealing material 19, such as a steel plate, etc., or it can be a flexible sealing material 19, such as a sealant, rubber, etc., or it can be a liquid sealing material 19, such as a sealing coating, etc.; if the sealing material 19 is a solid sealing material 19 such as a rigid or flexible sealing material 19, it can be pasted on the test bench 2 by pasting, and if the sealing material 19 is a liquid sealing material 19, it can be applied to the test bench 2.

[0042] The first air chamber 11 can be a high-pressure air chamber, and the second air chamber 12 can be a low-pressure air chamber. A pressurizing pipeline 3, a pressure relief pipeline 4 and a pressure measuring pipeline 5 are provided on the sealed container 1. The pressurizing pipeline 3 and the pressure relief pipeline 4 are both connected to the first air chamber 11, and the pressure measuring pipeline 5 is connected to the second air chamber 12; the pressurizing pipeline 3, the pressure relief pipeline 4 and the pressure measuring pipeline 5 can all pass through the side wall of the sealed container 1 to extend the pipe mouth into the inner cavity of the sealed container 1. Before the test, the pressurizing pipeline 3 can be used to pressurize the first air chamber 11 to increase the pressure in the first air chamber 11, so that a pressure difference is formed between the first air chamber 11 and the second air chamber 12. During the test, the pressure in the second air chamber 12 can be measured through the pressure measuring pipeline 5. After the test, the pressure of the first air chamber 11 can be relieved through the pressure relief pipeline 4 to restore it to a normal pressure state.

[0043] The test bench 2 can divide the space in the sealed container 1 into two air chambers, namely the first air chamber 11 and the second air chamber 12. The first air chamber 11 can be pressurized through the pressurized pipeline 3 to simulate the alternating internal pressure environment under the actual operating conditions in the gas storage chamber, and a pressure difference is formed between the first air chamber 11 and the second air chamber 12. Then, the sealing performance of the sealing material 19 on the test bench 2 to the test seam 21 can be judged by measuring the pressure change in the second air chamber 12, and the permeability of the sealing material 19 can also be calculated. After the test, the sealed container 1 can be opened to observe the position, shape and other change characteristics of the sealing material 19 on the test bench 2, and then the destruction mechanism of the sealing material 19 extruded along the crack under high pressure can be further studied; the filling pressure value and the pressure holding time in the first air chamber 11 can be set according to the test requirements.

[0044] In this embodiment, the sealed container 1 includes a shell 14 and a cover 13 that are fixedly connected. The cover 13 seals the opening of the shell 14. A heater 6 and a thermocouple 7 are provided on the cover 13. The heater 6 and the thermocouple 7 both pass through the cover 13 and extend into the first air chamber 11.

[0045] Here, the sealed container 1 can be assembled from a shell 14 and a cover plate 13. The shell 14 and the cover plate 13 can be fixedly connected by a flange and a high-strength bolt 17, or by a thread, a screw thread, a snap, a slot, etc. The present invention does not limit the connection structure and method between the shell 14 and the cover plate 13; in addition, the sealed container 1 can also be composed of two butt-jointed shells 14, and is not limited to the structure of the cover plate 13 and the shell 14; the heater 6 and the thermocouple 7 can also be placed in the first air chamber 11 through the side wall of the shell 14, the pressurized pipeline 3 and the pressure relief pipeline 4 can also extend into the first air chamber 11 through the cover plate 13, and the pressure measuring pipeline 5 can extend into the second air chamber 12 through the head of the shell 14 In the present invention, the specific locations of the heater 6, the thermocouple 7, the pressurizing pipeline 3, the pressure relief pipeline 4 and the pressure measuring pipeline 5 are not specifically limited, as long as they can be arranged in the corresponding air chamber; specifically, the heater 6 can be an electric heating rod, and an electric heating switch 61 can be provided on the electric heating rod, and whether the electric heating rod is heated can be controlled by turning on or off the electric heating switch 61. In addition, the heater 6 can also be other types of heating devices other than the electric heating rod, as long as the heating of the first air chamber 11 can be achieved; for the measurement of the temperature in the first air chamber 11, in addition to the thermocouple 7, other temperature measuring devices, such as temperature sensors, etc. can also be used, and the present invention does not make specific limitations on this.

[0046] The shell 14 and the cover plate 13 are detachable and sealed to form a sealed container 1. A heater 6 is arranged on the cover plate 13 to simulate the temperature change caused by pressurization in an actual gas storage chamber. The thermocouple 7 can monitor the temperature in the first air chamber 11 and adjust the temperature in the first air chamber 11 at any time through the heater 6. The sealing material 19 can be subjected to high temperature and high pressure at the same time during the test, and the influence on its sealing performance can restore the actual working conditions in the gas storage chamber.

[0047] Optionally, a first sealing member 15 is provided between the shell 14 and the cover plate 13; providing a sealing member between the shell 14 and the cover plate 13 can improve the sealing performance of the sealed container 1 and avoid leakage of the sealed container 1 under high pressure during the test; specifically, the first sealing member 15 can be a metal winding gasket, and a concave-convex surface for docking sealing can be formed on the connecting surface between the cover plate 13 and the shell 14, and the metal winding gasket can be arranged on the concave-convex surface so that the metal winding gasket is combined with the concave-convex surface to seal the shell 14 and the cover plate 13, thereby achieving the effect that the entire structure of the sealed container 1 can withstand high internal pressure; of course, the sealing structure between the shell 14 and the cover plate 13 is not limited to the concave-convex surface and the metal winding gasket, and the form of the first sealing member 15 is not limited to the metal winding gasket. As long as the structure can achieve the sealed container 1 under high internal pressure, it is within the scope of the present invention.

[0048] In this embodiment, a cooling water pipe 8 is provided in the first air chamber 11, and both ends of the cooling water pipe 8 extend through the cover plate 13 to the outside of the sealed container 1; cooling water can be introduced into the cooling water pipe 8 to cool the first air chamber 11. For example, when the heater 6 heats the first air chamber 11 to a temperature exceeding a preset test temperature, the heating can be stopped, and the cooling water in the cooling water pipe 8 can be used to cool the first air chamber 11 until the temperature drops to a preset temperature, and then the test can be carried out; here, the cooling water pipe 8 can also pass through the side wall of the shell 14 to enter the first air chamber 11, and its specific setting position is not limited, as long as the first air chamber 11 can be cooled.

[0049] Optionally, a cooling valve 81 is provided on the cooling water pipe 8 outside the sealed container 1; the cooling valve 81 can be provided on the cooling water pipe 8 to control the flow of cooling water in the cooling water pipe 8, thereby controlling the cooling process; of course, if a cooling water pump is provided upstream of the cooling water pipe 8, the cooling valve 81 may not be provided, and whether the cooling water is input into the cooling water pipe 8 can be controlled by directly controlling the cooling water pump.

[0050] In this embodiment, a plurality of ribs 9 intersecting each other are provided in the second air chamber 12, and the plate surface of the ribs 9 can be perpendicular to the table surface of the test bench 2, and the ribs 9 are used to support the test bench 2. A plurality of ribs 9 intersecting structure can be used to form a support structure to support the test bench 2, for example, two ribs 9 intersecting each other to form a cross-shaped structure in cross section, or four ribs 9 intersecting to form a cross-shaped structure in cross section, or other number of ribs 9, etc., or multiple ribs 9 can be arranged side by side and spaced from each other, etc., and the specific arrangement of the ribs 9 is not limited, as long as it can play the role of supporting the test bench 2; in addition, for the support structure of the test bench 2, in addition to the ribs 9, other forms of support structures can also be used, for example, a step structure is formed on the inner wall of the sealed container 1 between the first air chamber 11 and the second air chamber 12, and the test bench 2 is abutted on the step to achieve the effect of fixing the test bench 2, and after the first air chamber 11 is pressurized, the step can limit the test bench 2, and the present invention does not specifically limit the support structure of the test bench 2.

[0051] Optionally, a pad 10 is provided between the rib 9 and the test bench 2, and a through hole 101 is provided on the pad 10, and the through hole 101 is connected to the test seam 21 and the second air chamber 12; the rib 9 is separated from the test bench 2 by the pad 10 provided with the through hole 101, so that the test seam 21 is prevented from being blocked by the intersection of the ribs 9, so that the test seam 21 can maintain the connection with the second air chamber 12 through the through hole 101; usually, the opening position of the test seam 21 on the test bench 2 is the center of the test bench 2, and for the cross-rib 9 support structure, the intersection of the ribs 9 is also located at the center of its structure, If the test bench 2 is directly in contact with the rib plate 9, the intersection of the rib plate 9 will easily block the test seam 21, thereby preventing the test seam 21 from connecting with the second air chamber 12. A pad 10 can be added between the test bench 2 and the rib plate 9, and a through hole 101 can be opened on the pad 10. The pad 10 can separate the rib plate 9 from the test bench 2, and the through hole 101 can also be used to connect the test seam 21 with the second air chamber 12. In other words, the aperture of the through hole 101 needs to be maintained in a sufficiently large range and cannot be less than the radial dimension of the intersection of the rib plate 9, so that the through hole 101 can be connected with the second air chamber 12.

[0052] Optionally, a second seal 16 may be provided between the gasket 10 and the test bench 2. Here, the second seal 16 may be an O-ring. The gasket 10 and the test bench 2 may be fixedly connected by fastening bolts 18, thereby preventing pressure leakage from occurring on the contact surface between the gasket 10 and the test bench 2. In addition, the gasket 10 and the test bench 2 may also be connected and sealed by other means, such as threaded connection, concave-convex surface connection, etc., and the present invention does not make any specific limitation on this.

[0053] In this embodiment, a pressurizing valve 31 and a first pressure gauge 32 are provided on the pressurizing pipeline 3, and the first pressure gauge 32 is located downstream of the pressurizing valve 31; a pressure relief valve 41 is provided on the pressure relief pipeline 4; a pressure measuring valve 51 and a second pressure gauge 52 are provided on the pressure measuring pipeline 5, and the second pressure gauge 52 is located upstream of the pressure measuring valve 51; pressure gauges are provided on the pressurizing pipeline 3 and the pressure measuring pipeline 5, respectively, so that the pressure values ​​in the first air chamber 11 and the second air chamber 12 can be monitored in real time. The first pressure gauge 32 is provided downstream of the pressurizing valve 31, so that when the pressurizing valve 31 is closed to maintain pressure, the first pressure gauge 32 can also monitor the pressure in the first air chamber 11 Real-time monitoring is performed by setting the second pressure gauge 52 upstream of the pressure measuring valve 51. When the pressure measuring valve 51 is closed, the pressure change in the second air chamber 12 can be monitored by the second pressure gauge 52 to determine the sealing effect of the sealing material 19. Valves are set on the pressurizing pipeline 3, the pressure relief pipeline 4 and the pressure measuring pipeline 5 to adjust the pressure in the first air chamber 11 and the second air chamber 12. Here, the valve types set on each pipeline can be various valve types such as mechanical valves, manual valves, solenoid valves, etc. For pressure measuring equipment, in addition to pressure gauges, it can also be a pressure sensor, etc., and the present invention does not make specific limitations on this.

[0054] Example 2

[0055] This embodiment provides an airtightness performance test system for a sealing material.

[0056] The airtight performance test system of the sealing material described in this embodiment may include an air source, a control system and an airtight performance test device for the sealing material as described in Example 1, the air source can be connected to the pressurized pipeline 3, the control system can be connected to each valve on the pipeline, and can control the on and off of the pressurized pipeline 3, the pressure relief pipeline 4 and the pressure measuring pipeline 5; here, the air source can be a gas tank, an air pump and other equipment, and any equipment that can be used as a source of air pressure is not specifically limited in the present invention; the control system can be an intelligent control system, which can receive and display various parameters measured by measuring equipment such as temperature and pressure, and realize intelligent control of each valve according to the measured parameters.

[0057] It should be noted that the airtightness performance test device for the sealing material described in this embodiment is consistent with the airtightness performance test device for the sealing material described in Example 1, and this embodiment will not be further described in detail.

[0058] Example 3

[0059] This embodiment provides a method for testing the airtightness performance of a sealing material.

[0060] The airtightness performance test method of the sealing material described in this embodiment can adopt the airtightness performance test device of the sealing material described in Example 1 or the airtightness performance test system of the sealing material described in Example 2.

[0061] The airtightness performance test method of the sealing material described in this embodiment may include the following steps:

[0062] S1: Before pressurization, install the sealing material 19 on the test bench 2 and cover the test seam 21. If it is a liquid sealing material 19, it can be applied on the test bench 2; if it is a solid sealing material 19, it can be attached to the test bench 2;

[0063] S2: Connect the test bench 2 and the backing plate 10 with the fastening bolts 18, place the second sealing member 16 in the sealing groove on the backing plate 10, install the test bench 2 in the sealed container 1, and place the sealing material 19 in the first air chamber 11.

[0064] S3: Connect the cover plate 13 and the shell 14 by high-strength bolts 17, and install the first sealing member 15 on the concave and convex surface between the cover plate 13 and the shell 14 to seal the sealed container 1.

[0065] S4: Open the pressurizing valve 31 and the electric heating switch 61, keep the cooling valve 81, the pressure relief valve 41 and the pressure measuring valve 51 closed, pressurize the first air chamber 11 to the test pressure through the pressurizing pipeline 3, and heat the first air chamber 11 to the preset test temperature through the heater 6.

[0066] S5: Observe the pressure and temperature parameters measured by the first pressure gauge 32 and the thermocouple 7. When the air pressure and temperature in the first air chamber 11 are higher than the set threshold value, close the pressurizing valve 31 and the electric heating switch 61, and open the pressure relief valve 41 and the cooling valve 81. After the pressure and temperature in the first air chamber 11 drop to the temperature and pressure required for the test, close the pressure relief valve 41 and the cooling valve 81 to keep the pressure and temperature in the first air chamber 11 for a period of time.

[0067] S6: Keep the pressure measuring valve 51 closed, measure the pressure change in the second air chamber 12 through the second pressure gauge 52, and further convert the amount of gas passing through the sealing material 19, so as to obtain the permeability coefficient of the sealing material 19.

[0068] S7: After the test is completed, open the pressure relief valve 41 and the pressure measuring valve 51 to release the pressure, loosen the high-strength bolts 17, remove the cover plate 13 and the shell 14, loosen the fastening bolts 18, remove the test bench 2, observe and record the shape of the sealing material 19 on the test bench 2 and in the test seam 21, replace the sealing material 19 and the test bench 2, and prepare for the next round of experiments.

[0069] In summary, the present invention provides an apparatus, system and method for testing the airtightness performance of a sealing material. The test bench can separate the space in a sealed container into two air chambers, namely, a first air chamber and a second air chamber. The first air chamber can be pressurized through a pressurized pipeline to simulate the alternating internal pressure environment under the operating conditions in an actual gas storage chamber, and a pressure difference is formed between the first air chamber and the second air chamber. The sealing performance of the sealing material on the test bench for the test seam can be judged by measuring the pressure change in the second air chamber, and the permeability of the sealing material can also be calculated. After the test, the sealed container can be opened to observe the changing characteristics of the position and shape of the sealing material on the test bench, so as to further study the fracture of the sealing material squeezed along the crack under the action of high pressure. damage mechanism; by controlling the rate and temperature of high-pressure gas injection, the temperature-pressure change curve of the material can be obtained; taking into account the difference in material permeability, the air pressure of the second air chamber will change after the internal pressure is applied. The change in air pressure is used as the basis for judgment to determine the thickness of different sealing materials that meet the permeability coefficient requirements of the sealing layer of the artificial gas storage cavern, which can provide design parameters for the sealing scheme of the artificial gas storage cavern; test seams of different widths are preset on the test bench, and after the sealing material is tightly fitted to the test bench, the sealing characteristics of different materials and their differences at different seam widths are studied. Through testing and data analysis through the test device system, the change law of the sealing material with the seam width can be verified, providing technical support for material selection and design optimization of artificial gas storage caverns.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing material airtightness test device, characterized in that: The invention comprises a sealed container (1) and a test bench (2), wherein the inner cavity of the sealed container (1) comprises a first air chamber (11) and a second air chamber (12), the test bench (2) is fixedly installed in the sealed container (1) and separates the first air chamber (11) from the second air chamber (12), and a through test seam (21) is provided on the test bench (2); The sealed container (1) is provided with a pressurizing pipeline (3) and a pressure measuring pipeline (5); the pressurizing pipeline (3) is connected to the first air chamber (11), and the pressure measuring pipeline (5) is connected to the second air chamber (12); a sealing material (19) can be arranged on a side of the test bench (2) facing the first air chamber (11) and covering the test seam (21); the pressurizing pipeline (3) can pressurize the first air chamber (11) so that the pressure in the first air chamber (11) is higher than the pressure in the second air chamber (12).

2. The airtightness performance test device of the sealing material according to claim 1, characterized in that: The sealed container (1) comprises a shell (14) and a cover plate (13) which are fixedly connected, wherein the cover plate (13) seals an opening of the shell (14), and a heater (6) and a thermocouple (7) are provided on the cover plate (13), wherein both the heater (6) and the thermocouple (7) pass through the cover plate (13) and extend into the first air chamber (11).

3. The airtightness performance test device of the sealing material according to claim 2, characterized in that: A first sealing member (15) is provided between the housing (14) and the cover plate (13).

4. The airtightness performance test device of the sealing material according to claim 2, characterized in that: A cooling water pipe (8) is provided in the first air chamber (11), and both ends of the cooling water pipe (8) pass through the cover plate (13) and extend to the outside of the sealed container (1).

5. The airtightness performance test device of the sealing material according to claim 4, characterized in that: The cooling water pipe (8) is provided with a cooling valve (81) on the pipeline outside the sealed container (1).

6. The airtightness performance test device of the sealing material according to claim 1, characterized in that: A plurality of ribs (9) are arranged in the second air chamber (12); the plate surfaces of the ribs (9) are perpendicular to the table surface of the test bench (2); and the ribs (9) are used to support the test bench (2).

7. The airtightness performance test device of the sealing material according to claim 6, characterized in that: A plurality of the ribs (9) are arranged crosswise with each other; a pad (10) is provided between the ribs (9) and the test bench (2); a through hole (101) is provided on the pad (10); the through hole (101) is connected to the test seam (21) and the second air chamber (12); and a second sealing member (16) is provided between the pad (10) and the test bench (2).

8. The airtightness performance test device of a sealing material according to any one of claims 1 to 7, characterized in that: The pressurizing pipeline (3) is provided with a pressurizing valve (31) and a first pressure gauge (32), and the first pressure gauge (32) is located downstream of the pressurizing valve (31); the sealed container (1) is also provided with a pressure relief pipeline (4), and the pressure relief pipeline (4) is provided with a pressure relief valve (41); the pressure measuring pipeline (5) is provided with a pressure measuring valve (51) and a second pressure gauge (52), and the second pressure gauge (52) is located upstream of the pressure measuring valve (51).

9. A sealing material airtightness test system, characterized in that: The invention comprises an air source, a control system and an airtightness performance test device for a sealing material as claimed in any one of claims 1 to 8, wherein the air source is connected to the pressurized pipeline (3), and the control system can control the on-off of the air source, the pressurized pipeline (3) and the pressure measuring pipeline (5).

10. A method for testing the airtightness of a sealing material, characterized in that: Using the airtightness performance test device of any one of claims 1 to 8 or the airtightness performance test system of the sealing material according to claim 9, the test method comprises: S1: installing a sealing material (19) on the test bench (2) and covering the test seam (21); S2: installing the test bench (2) in the sealed container (1) so that the side of the test bench (2) equipped with the sealing material (19) faces the first air chamber (11); S3: sealing the sealed container (1), and pressurizing the first air chamber (11) to a test pressure through the pressurizing pipeline (3); S4: Maintaining the pressure in the first air chamber (11) at the test pressure, and measuring the pressure in the second air chamber (12).

Images