Pressure testing system for gas cylinder with internal material
By using an inert gas pressure testing system instead of water, the problem of pressure testing for gas cylinders containing internal materials has been solved. This system enables safe, economical, and environmentally friendly pressure testing of gas cylinders, ensuring the adsorption effect of the materials and the pressure resistance of the gas cylinders.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 大连大特气体股份有限公司
- Filing Date
- 2026-03-16
- Publication Date
- 2026-04-28
AI Technical Summary
In existing technologies, when pressure testing gas cylinders containing internal materials, water-based pressure testing can cause solid particles to react with water, resulting in the loss of adsorption function. Furthermore, the loading and unloading process is time-consuming and labor-intensive, affecting the performance and safety of the gas cylinders.
Using inert gas instead of water, the pipeline components and controllers operate through stages of gas transfer, pressurization, pressure holding, pressure release, and gas return to achieve pressure testing of gas cylinders containing internal materials. By utilizing the recycling and recovery of inert gas, repeated loading and unloading of materials is avoided.
It achieves economic efficiency, environmental friendliness, and safety in gas cylinder pressure testing, reduces energy consumption and environmental pollution, and ensures the integrity and adsorption effect of the materials inside the gas cylinder.
Smart Images
Figure FT_1
Abstract
Description
Technical Field
[0001] This invention relates to the field of pressure testing technology, and more particularly to a pressure testing system for gas cylinders containing internal materials. Background Technology
[0002] The material inside the gas cylinder adsorbs relevant gases for later use. For better gas adsorption, the material typically needs to be porous (i.e., porous solid particles) with low particle strength. The filling and unloading of these solid particles is not only time-consuming but may also damage their integrity, thus affecting the adsorption effect. Furthermore, some solid particles cannot be exposed to air or moisture because oxygen in the air or water molecules in the moisture can react with key molecules in the solid particles, significantly reducing their adsorption capacity.
[0003] Gas cylinders containing internal materials require periodic pressure testing. The common method for this testing is a water-based pressure test, where the cylinder is pressurized with water to a set pressure and held to verify its pressure resistance. However, many solid particles are not water-resistant; water reacts with these particles, causing them to lose their adsorption capacity after the pressure test.
[0004] Therefore, there is an urgent need to provide a pressure testing system for gas cylinders containing internal materials to solve the above-mentioned technical problems. Summary of the Invention
[0005] This invention provides a pressure testing system for gas cylinders containing internal materials, which can perform pressure testing on gas cylinders containing internal materials.
[0006] This invention provides a pressure testing system for gas cylinders containing internal materials, comprising a gas storage tank, a test gas cylinder, a gas transfer tank, a controller, a first pipeline assembly connected to the gas storage tank and the test gas cylinder respectively, and a second pipeline assembly connected to the test gas cylinder and the gas transfer tank respectively. The gas storage tank stores inert gas, the test gas cylinder stores solid particles, the test gas cylinder is placed in a sealed water tank containing water, the test gas cylinder is connected to a pressure detection device, and the sealed water tank is connected to an expansion water metering device. The pressure testing process of the test gas cylinder includes a sequentially progressive gas transfer stage, a pressure increase stage, a pressure holding stage, a pressure release stage, and a gas return stage. The controller is used to perform the following operations: During the gas transfer phase, the first pipeline assembly is closed and the second pipeline assembly is opened to discharge the gas adsorbed by the solid particles in the test gas bottle into the gas transfer tank. During the pressurization phase, the first pipeline assembly is opened and the second pipeline assembly is closed to discharge the inert gas in the gas storage tank into the test gas cylinder; During the pressure holding phase, both the first pipeline assembly and the second pipeline assembly are shut down to determine whether the test gas cylinder has passed the pressure test based on the pressure detection device and the expansion water metering device. During the depressurization phase, the inert gas in the test gas cylinder is completely vented. During the return gas phase, the first pipeline assembly is closed and the second pipeline assembly is opened to discharge the gas in the gas return tank into the test gas cylinder.
[0007] Preferably, the first pipeline assembly includes a first branch and a second branch arranged in parallel. A first valve is provided on the first branch, and a first compressor is provided on the second branch. The low-pressure end of the first compressor is connected to the gas storage tank, and the high-pressure end is connected to the test gas cylinder.
[0008] Preferably, the gas storage tank is connected to a pressure detection device, and the controller is specifically used to perform the following operations: During the pressurization phase, the first valve is opened to discharge the inert gas in the gas storage tank into the test gas cylinder. When the pressure of the test gas cylinder reaches the first preset pressure, the first valve is closed. If the pressure of the test gas cylinder cannot reach the first preset pressure, the first valve is closed and the first compressor is turned on when the pressures of the gas storage tank and the test gas cylinder are balanced, until the pressure of the test gas cylinder reaches the first preset pressure. During the depressurization phase, the first valve is opened to discharge the inert gas in the test gas cylinder into the gas storage tank. When the pressures of the gas storage tank and the test gas cylinder are balanced, the first valve is closed.
[0009] Preferably, the test gas cylinder is further connected to a vent valve and a vacuum pump, and the controller is specifically used to perform the following operations: During the pressure relief phase, after the first valve is closed, the vent valve is opened until the pressure in the test gas cylinder is reduced to atmospheric pressure. Then, the vent valve is closed and the vacuum pump is opened until the pressure in the test gas cylinder is reduced to the first target pressure.
[0010] Preferably, the second pipeline assembly includes a third branch, a fourth branch, and a fifth branch arranged in parallel. A second valve is provided on the third branch, a second compressor is provided on the fourth branch, and a third compressor is provided on the fifth branch. The low-pressure end of the second compressor is connected to the test gas cylinder, and the high-pressure end is connected to the gas transfer tank. The low-pressure end of the third compressor is connected to the gas transfer tank, and the high-pressure end is connected to the test gas cylinder.
[0011] Preferably, the gas tank is connected to a pressure detection device, and the controller is specifically used to perform the following operations: During the gas transfer phase, if the pressure in the test gas cylinder is higher than the pressure in the transfer tank, the second valve is opened until the pressures of the test gas cylinder and the transfer tank are balanced; if the pressure in the test gas cylinder is lower than the pressure in the transfer tank or the pressures of the test gas cylinder and the transfer tank are balanced, the second valve is closed and the second compressor is opened until the pressure in the test gas cylinder drops to a second preset pressure. During the return gas phase, the second valve is opened until the pressure of the test gas cylinder and the return gas tank is balanced. Then, the second valve is closed and the third compressor is turned on until the pressure in the test gas cylinder is increased to the second target pressure. Beneficial effects
[0012] The pressure testing system for gas cylinders containing internal materials provided by this invention utilizes a controller to sequentially execute a gas transfer stage, a pressurization stage, a pressure holding stage, a pressure release stage, and a gas return stage. This not only enables the recovery and reuse of adsorbed gas in the tested gas cylinder but also allows for the repeated use of inert gas in the storage tank, thereby improving the economy of the pressure testing process, reducing environmental pollution, and avoiding repeated loading and unloading of internal materials. Therefore, this solution can economically, environmentally, safely, and automatically perform pressure testing on gas cylinders containing internal materials. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 A schematic diagram of a pressure testing system for a gas cylinder containing internal materials, according to one embodiment, is shown. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0016] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.
[0017] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0018] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," "outer," or "middle" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention 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, and therefore should not be construed as a limitation of this invention.
[0019] like Figure 1 As shown, this invention provides a pressure testing system for gas cylinders containing internal materials, including a gas storage tank 1, a test gas cylinder 2, a gas transfer tank 3, a controller 4, a first pipeline assembly 5 connected to the gas storage tank 1 and the test gas cylinder 2 respectively, and a second pipeline assembly 6 connected to the test gas cylinder 2 and the gas transfer tank 3 respectively. The gas storage tank 1 stores inert gas, the test gas cylinder 2 stores solid particles, the test gas cylinder 2 is placed in a sealed water tank 21 containing water, the test gas cylinder 2 is connected to a pressure detection device 22, and the sealed water tank 21 is connected to an expansion water metering device 23. The pressure testing process of the test gas cylinder 2 includes a sequentially progressive gas transfer stage, a pressure increase stage, a pressure holding stage, a pressure release stage, and a gas return stage. The controller 4 is used to perform the following operations: During the gas transfer phase, the first pipeline assembly 5 is closed and the second pipeline assembly 6 is opened to discharge the gas adsorbed by solid particles in the test gas cylinder 2 into the gas transfer tank 3. During the pressurization phase, the first pipeline assembly 5 is opened and the second pipeline assembly 6 is closed to discharge the inert gas in the gas storage tank 1 into the test gas cylinder 2. During the pressure holding phase, both the first pipeline assembly 5 and the second pipeline assembly 6 are closed to determine whether the test gas cylinder 2 has passed the pressure test based on the pressure detection device 22 and the expansion water metering device 23. During the depressurization phase, the inert gas in the test gas cylinder 2 is completely discharged. During the return gas phase, the first pipeline assembly 5 is closed and the second pipeline assembly 6 is opened to discharge the gas in the gas return tank 3 into the test gas cylinder 2.
[0020] In this embodiment, by using controller 4 to sequentially execute the gas transfer stage, pressurization stage, pressure holding stage, pressure release stage, and gas return stage, not only can the gas adsorbed in the test gas cylinder 2 be recovered and reused, but the inert gas in the gas storage tank 1 can also be reused repeatedly. This improves the economy of the pressure testing process, reduces environmental pollution, and avoids repeated loading and unloading of internal materials. Therefore, this solution can economically, environmentally, safely, and automatically perform pressure testing on gas cylinders containing internal materials.
[0021] In other words, this invention places the test gas cylinder 2 containing the adsorbed gas material in a sealed water tank 21 filled with water. After replacing the adsorbed gas in the test gas cylinder 2, the test gas cylinder 2 is pressurized using high-pressure inert gas until a set pressure is reached. The amount of water discharged from the sealed water tank 21 is then checked to verify whether the test gas cylinder 2 can pass the pressure test. Therefore, the above technical solution eliminates the need for repeated emptying and refilling of the test gas cylinder 2 with adsorbed material, thereby ensuring the safety of the gas cylinder containing the adsorbed gas material.
[0022] It is understandable that the gas storage tank 1 and the gas transfer tank 3 may not be a single container, but rather a combination of containers with different pressures and volumes. In some embodiments, the sealed water tank 21 needs to be designed to crack but not explode.
[0023] Of course, the controller 4 mentioned above can also be omitted and replaced by human control, that is, human intervention is required at each stage to perform operations so that each controlled component can operate and be repaired independently.
[0024] In one embodiment, the first piping assembly 5 includes a first branch 51 and a second branch 52 arranged in parallel. A first valve 53 is installed on the first branch 51, and a first compressor 54 is installed on the second branch 52. The low-pressure end of the first compressor 54 is connected to the gas storage tank 1, and the high-pressure end is connected to the test gas cylinder 2. This configuration allows for a more convenient and efficient pressurization strategy, thereby further reducing energy consumption.
[0025] In one embodiment, the gas storage tank 1 is connected to a pressure detection device 22, and the controller 4 is specifically used to perform the following operations: During the pressurization phase, the first valve 53 is opened to discharge the inert gas in the gas storage tank 1 into the test gas cylinder 2. When the pressure of the test gas cylinder 2 reaches the first preset pressure, the first valve 53 is closed. If the pressure of the test gas cylinder 2 cannot reach the first preset pressure, the first valve 53 is closed and the first compressor 54 is opened when the pressures of the gas storage tank 1 and the test gas cylinder 2 are balanced, until the pressure of the test gas cylinder 2 reaches the first preset pressure. During the depressurization phase, the first valve 53 is opened to release the inert gas from the test gas cylinder 2 into the storage tank 1. Once the pressures of the storage tank 1 and the test gas cylinder 2 are balanced, the first valve 53 is closed. This design ensures the effective recovery and reuse of the inert gas, further conserving resources.
[0026] In one embodiment, the test gas cylinder 2 is also connected to a vent valve 55 and a vacuum pump 56, and the controller 4 is specifically used to perform the following operations: During the pressure relief phase, after the first valve 53 is closed, the vent valve 55 is opened until the pressure in the test gas cylinder 2 drops to atmospheric pressure. Then, the vent valve 55 is closed and the vacuum pump 56 is opened until the pressure in the test gas cylinder 2 is reduced to the first target pressure. This setup allows for a more convenient and efficient pressure relief strategy, thereby further reducing energy consumption.
[0027] In one embodiment, the second pipeline assembly 6 includes a third branch 61, a fourth branch 62, and a fifth branch 63 arranged in parallel. A second valve 64 is provided on the third branch 61, a second compressor 65 is provided on the fourth branch 62, and a third compressor 66 is provided on the fifth branch 63. The low-pressure end of the second compressor 65 is connected to the test gas cylinder 2, and the high-pressure end is connected to the gas transfer tank 3. The low-pressure end of the third compressor 66 is connected to the gas transfer tank 3, and the high-pressure end is connected to the test gas cylinder 2.
[0028] In one embodiment, the gas tank 3 is connected to a pressure detection device 22, and the controller 4 is specifically used to perform the following operations: During the gas transfer phase, if the pressure in the test gas cylinder 2 is higher than the pressure in the transfer tank 3, the second valve 64 is opened until the pressures of the test gas cylinder 2 and the transfer tank 3 are balanced; if the pressure in the test gas cylinder 2 is lower than the pressure in the transfer tank 3 or the pressures of the test gas cylinder 2 and the transfer tank 3 are balanced, the second valve 64 is closed and the second compressor 65 is opened until the pressure of the test gas cylinder 2 is reduced to the second preset pressure. During the gas return phase, the second valve 64 is opened until the pressures of the test gas cylinder 2 and the gas return tank 3 are balanced. Then, the second valve 64 is closed and the third compressor 66 is opened until the pressure in the test gas cylinder 2 is increased to the second target pressure. This setup allows for a more convenient and efficient gas return strategy, further ensuring the recovery and utilization of adsorbed gases and reducing energy consumption.
[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.
[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A pressure testing system for gas cylinders containing internal materials, characterized in that, The system includes a gas storage tank, a test gas cylinder, a gas transfer tank, a controller, a first piping assembly connected to the gas storage tank and the test gas cylinder respectively, and a second piping assembly connected to the test gas cylinder and the gas transfer tank respectively. The gas storage tank stores inert gas, the test gas cylinder stores solid particles, the test gas cylinder is placed in a sealed water tank containing water, the test gas cylinder is connected to a pressure detection device, and the sealed water tank is connected to an expansion water metering device. The pressure testing process of the test gas cylinder includes a sequentially progressive gas transfer stage, a pressure increase stage, a pressure holding stage, a pressure release stage, and a gas return stage. The controller is used to perform the following operations: During the gas transfer phase, the first pipeline assembly is closed and the second pipeline assembly is opened to discharge the gas adsorbed by the solid particles in the test gas bottle into the gas transfer tank. During the pressurization phase, the first pipeline assembly is opened and the second pipeline assembly is closed to discharge the inert gas in the gas storage tank into the test gas cylinder; During the pressure holding phase, both the first pipeline assembly and the second pipeline assembly are shut down to determine whether the test gas cylinder passes the pressure test based on the pressure detection device and the expansion water metering device. During the depressurization phase, the inert gas in the test gas cylinder is completely vented. During the return gas phase, the first pipeline assembly is closed and the second pipeline assembly is opened to discharge the gas in the gas return tank into the test gas cylinder.
2. The pressure testing system according to claim 1, characterized in that, The first pipeline assembly includes a first branch and a second branch arranged in parallel. A first valve is provided on the first branch, and a first compressor is provided on the second branch. The low-pressure end of the first compressor is connected to the gas storage tank, and the high-pressure end is connected to the test gas cylinder.
3. The pressure testing system according to claim 2, characterized in that, The gas storage tank is connected to a pressure detection device, and the controller is specifically used to perform the following operations: During the pressurization phase, the first valve is opened to discharge the inert gas in the gas storage tank into the test gas cylinder. When the pressure of the test gas cylinder reaches the first preset pressure, the first valve is closed. If the pressure of the test gas cylinder cannot reach the first preset pressure, the first valve is closed and the first compressor is turned on when the pressures of the gas storage tank and the test gas cylinder are balanced, until the pressure of the test gas cylinder reaches the first preset pressure. During the depressurization phase, the first valve is opened to discharge the inert gas in the test gas cylinder into the storage tank. When the pressures of the storage tank and the test gas cylinder are balanced, the first valve is closed.
4. The pressure testing system according to claim 3, characterized in that, The test gas cylinder is also connected to a vent valve and a vacuum pump, and the controller is specifically used to perform the following operations: During the pressure relief phase, after the first valve is closed, the vent valve is opened until the pressure in the test gas cylinder is reduced to atmospheric pressure. Then, the vent valve is closed and the vacuum pump is opened until the pressure in the test gas cylinder is reduced to the first target pressure.
5. The pressure testing system according to claim 3, characterized in that, The second pipeline assembly includes a third branch, a fourth branch, and a fifth branch arranged in parallel. A second valve is provided on the third branch, a second compressor is provided on the fourth branch, and a third compressor is provided on the fifth branch. The low-pressure end of the second compressor is connected to the test gas cylinder, and the high-pressure end is connected to the gas transfer tank. The low-pressure end of the third compressor is connected to the gas transfer tank, and the high-pressure end is connected to the test gas cylinder.
6. The pressure testing system according to claim 5, characterized in that, The gas transfer tank is connected to a pressure detection device, and the controller is specifically used to perform the following operations: During the gas transfer phase, if the pressure in the test gas cylinder is higher than the pressure in the transfer tank, the second valve is opened until the pressures of the test gas cylinder and the transfer tank are balanced; if the pressure in the test gas cylinder is lower than the pressure in the transfer tank or the pressures of the test gas cylinder and the transfer tank are balanced, the second valve is closed and the second compressor is opened until the pressure in the test gas cylinder drops to a second preset pressure. During the return gas phase, the second valve is opened until the pressure of the test gas cylinder and the return gas tank is balanced. Then, the second valve is closed and the third compressor is turned on until the pressure in the test gas cylinder is increased to the second target pressure.