A pressure testing device for a gas storage tank

Abstract

This invention provides a pressure testing device for gas storage tanks, belonging to the field of pressure vessel technology. It solves the technical problems of existing high-pressure gas pipe sealing tests, such as the inability to detect leaks during pressurization and the risk of explosion during testing. This pressure testing device for gas storage tanks includes a water tank, a booster pump, a pressure vessel, a main inlet water pipe, a main return water pipe, an inlet connector, and multiple inlet and return water branch pipes. The inlet connector has an inlet valve near the end of the main inlet water pipe and a pressure relief port in the middle, with a pressure relief valve at the pressure relief port. Each return water branch pipe has a return water valve at its connection to the main return water pipe. A water pump is connected to the main return water pipe to pump water from the pipes back to the water tank. This invention uses water as the detection medium, which is less prone to explosion; and it allows for direct visual observation of water leakage on the outer wall of the gas storage tank during pressurization, thus enabling rapid and intuitive identification of leaks at an early stage.

Description

Technical Field

[0001] This utility model belongs to the field of pressure vessel technology, and specifically refers to a pressure testing device for a gas storage tank. Background Technology

[0002] Gas storage tanks are devices specifically designed to store gases and stabilize system pressure. Based on the pressure they can withstand, gas storage tanks can be classified as high-pressure gas storage tanks, low-pressure gas storage tanks, and atmospheric pressure gas storage tanks. To ensure the quality and compliance of gas storage tanks, a sealing test is required after the tanks are manufactured to ensure that they are stable, airtight, and leak-proof, thus achieving the functions of gas storage and pressure stabilization.

[0003] Currently, the sealing test of gas storage tanks is mostly carried out using the pressure method. This involves pressurizing the gas storage tank with gas, sealing the tank, recording the current pressure, and then observing the pressure on the pressure gauge after a period of time. If the pressure does not change, it indicates that the gas storage tank is sealing up to standard; if the pressure changes, it indicates that the gas storage tank is not sealing up to standard.

[0004] The above testing methods work well for low-pressure or atmospheric pressure gas storage tanks. However, when testing high-pressure gas storage tanks, if there are any damages or cracks, it is not easy to determine whether there is a leak using a pressure gauge during pressurization. When the pressure reaches the rated pressure, the pressure inside the high-pressure gas storage tank is very high, and the high-pressure gas storage tank is prone to explosion during the testing process, posing a safety hazard. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a pressure detection device that can detect leaks in high-pressure gas tanks during the pressurization process and has higher safety in the detection process.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A pressure testing device for a gas storage tank includes a water tank, a booster pump, a pressure tank, a main inlet water pipe, a main return water pipe, and multiple inlet branch pipes and multiple return branch pipes. The booster pump can extract water from the water tank and deliver it to the pressure tank to form high-pressure water. The main inlet water pipe is connected to the pressure tank. One end of each inlet branch pipe is connected to the main inlet water pipe via an inlet connector, and the other end of each inlet branch pipe can be connected to the gas storage tank to be tested. An inlet valve is provided on the end of the inlet connector near the main inlet water pipe. A pressure relief port is provided in the middle of the inlet connector. A pressure relief valve is provided at the pressure relief port. A pressure relief branch pipe is connected to the pressure relief port. The other end of each pressure relief branch pipe is connected to the pressure relief main pipe or the main return water pipe. One end of each return water branch pipe is connected to the main return water pipe. A return water valve is provided at the connection between each return water branch pipe and the main return water pipe. A water pump is connected to the main return water pipe to pump water from the pipe to the water tank.

[0008] This pressurized testing equipment uses water as the testing medium. Utilizing its incompressibility and fluidity, it allows for direct visual inspection of the gas tank's outer wall for leaks during pressurization, enabling rapid and intuitive identification of leaks at an early stage, significantly improving detection sensitivity and safety. Simultaneously, the pressure relief valve and branch pipe ensure rapid pressure release upon leak detection or after testing, preventing safety hazards caused by high-pressure water retention. The return water branch pipe and pump work together to efficiently recover wastewater after testing, reducing water waste.

[0009] In the aforementioned pressurization testing device for a gas storage tank, a main inlet valve is also provided at the end of the water inlet connector near the main water inlet pipe. The main inlet valve is located in front of the water inlet valve, and a first pressure gauge is provided between the main inlet valve and the water inlet valve.

[0010] This pressurization testing equipment, by installing a first pressure gauge between the main inlet valve and the inlet valve, can monitor the pressure changes of the main inlet pipe section in real time. This makes it easier for operators to determine whether the system is normal during the initial calibration and pressurization stages, avoiding equipment damage or testing errors caused by abnormal pressure, and improving the controllability and accuracy of the system.

[0011] In the aforementioned pressure testing device for a gas storage tank, a second pressure gauge is provided at the end of the water inlet connector away from the water inlet valve, and the second pressure gauge is located behind the pressure relief port.

[0012] This pressurization testing equipment, by setting a second pressure gauge, can directly monitor the actual pressure inside the gas storage tank and compare it with the first pressure gauge, thereby more accurately determining whether the gas storage tank is leaking or whether the pressure is stable. This enhances the reliability of the test results and the comprehensiveness of the judgment basis. It can also determine the pressure inside the gas storage tank during the depressurization process, avoiding the need to disassemble the water inlet branch pipe when the pressure in the gas storage tank is too high, thus improving safety.

[0013] In the aforementioned pressurization testing equipment for a gas storage tank, the water inlet branch pipe is a high-pressure hose, comprising an inner rubber layer, a reinforcing layer, and an outer rubber layer arranged sequentially from the inside out. The inner rubber layer is made of synthetic rubber, the outer rubber layer is made of rubber, and the reinforcing layer is made of 1-8 layers of high-strength braiding or winding. Both ends of the water inlet branch pipe are respectively connected to explosion-proof connectors. One explosion-proof connector is fixedly connected and communicates with the water inlet connector, and the other explosion-proof connector can be detachably fixed and communicated with the air inlet of the gas storage tank.

[0014] This pressurized testing equipment significantly enhances the pressure resistance and explosion-proof performance of the inlet branch pipe by employing a multi-layered high-pressure hose and explosion-proof connectors. It can safely and reliably transport water under high-pressure environments. The detachable design of the explosion-proof connectors facilitates quick connection and disassembly of the gas storage tank, improving operational efficiency and equipment applicability. The synthetic rubber of the inner layer can be NBR (nitrile rubber), EPDM (ethylene propylene diene monomer rubber), or polyurethane, while the rubber material of the outer layer can be CR (chloroprene rubber), EPDM, or PVC. The inner layer directly contacts the transported high-pressure water, ensuring smooth flow, while the outer layer protects the internal steel wire from wear, corrosion, or external impacts, extending the service life of the inlet branch pipe.

[0015] In the aforementioned pressurization testing device for a gas storage tank, the diameter of the return water branch pipe is smaller than the diameter of the air inlet of the gas storage tank, and the return water branch pipe can be inserted into the interior of the gas storage tank through the air inlet.

[0016] This pressurized testing equipment designs the return water branch pipe as a thin tube structure that can be inserted into the gas storage tank, which can more thoroughly extract residual water in the tank, avoid the impact of water accumulation on subsequent testing or the use of the gas storage tank, and at the same time improve the efficiency of wastewater recycling and the overall cleanliness of the system.

[0017] In the aforementioned pressurization testing device for a gas storage tank, a partition is provided inside the water tank, which divides the water tank into a recovery pool and a clean water pool. The return water main is connected to the recovery pool, the booster pump is connected to the clean water pool, and a delivery pump is provided above the water tank to pump water from the top of the recovery pool to the clean water pool.

[0018] This pressurized testing equipment divides the water tank into a recycling pool and a clean water pool through a partition, and is equipped with a water pump to achieve sedimentation, purification and recycling of the testing water. This not only saves water resources, but also avoids environmental pollution caused by direct discharge of wastewater, which meets the requirements of green manufacturing and sustainable development.

[0019] The working process of this pressure testing equipment is as follows: The booster pump draws water from the water purification tank and delivers it to the pressure tank to form high-pressure water. The air inlet of the gas storage tank to be tested is reliably connected to the water inlet branch pipe. Then, the main water inlet valve and the water inlet valve are opened in sequence, and the pressure relief valve is closed, allowing the high-pressure water in the pressure tank to be injected into the gas storage tank through the main water inlet pipe and the water inlet branch pipe. After the gas storage tank is filled with water, its air outlet is closed, and high-pressure water continues to be injected to gradually increase the pressure inside the tank. During this pressurization process, the sealing performance can be visually judged by observing whether water seeps out of the outer wall of the gas storage tank. If there is water seepage, it indicates that there is a leak, and the water inlet valve should be closed immediately. If there is no water seepage, pressurization continues until the second pressure gauge value reaches the predetermined pressure. Then, the water inlet valve is closed and the pressure is maintained for a certain period of time. During this period, the water seepage situation and the change of the second pressure gauge value are continuously observed to further confirm the sealing performance.

[0020] After the pressure holding period is completed, open the pressure relief valve to safely release the pressure inside the gas storage tank through the pressure relief branch pipe and the return water main pipe or the pressure relief main pipe. After the pressure inside the tank returns to normal pressure, disconnect the connection between the inlet branch pipe and the gas storage tank, insert the return water branch pipe into the gas storage tank through the air inlet, open the return water valve, and start the water pump to pump the residual water in the gas storage tank to the recycling tank through the return water branch pipe and the return water main pipe. After the wastewater is treated by sedimentation in the recycling tank, it is then transported to the clean water tank by the conveying water pump to realize the recycling of water resources.

[0021] Compared with the prior art, the technical effects of this utility model are as follows:

[0022] This invention uses water as the detection medium, leveraging its incompressibility and fluidity to allow for direct visual observation of water leakage on the outer wall of the gas storage tank during pressurization. This enables rapid and intuitive identification of leaks at an early stage, significantly improving detection sensitivity and safety. Simultaneously, the pressure relief valve and branch pipe allow for rapid pressure release upon leak detection or after test completion, avoiding safety hazards caused by high-pressure water retention. The combination of the return water branch pipe and the water pump enables efficient recycling of wastewater after testing, reducing water waste. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0024] Figure 2 This is a structural schematic diagram of the water inlet connector of this utility model.

[0025] Figure 3 This is a partial sectional view of the water inlet branch pipe of this utility model.

[0026] In the diagram, 1. Water tank; 11. Baffle plate; 12. Recycling tank; 13. Clean water tank; 2. Booster pump; 3. Pressure tank; 4. Main inlet pipe; 41. Branch inlet pipe; 411. Inner rubber layer; 412. Reinforcing layer; 413. Outer rubber layer; 414. Explosion-proof connector; 5. Inlet connector; 51. Inlet valve; 52. Pressure relief port; 53. Pressure relief valve; 54. Pressure relief branch pipe; 55. Main inlet valve; 56. First pressure gauge; 57. Second pressure gauge; 6. Main return water pipe; 61. Return water branch pipe; 62. Return water valve; 7. Pump; 8. Delivery pump. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] The pressurization testing equipment for this gas storage tank includes a water tank 1, a booster pump 2, a pressure tank 3, a main inlet water pipe 4, a main return water pipe 6, and multiple inlet branch pipes 41 and multiple return branch pipes 61. The booster pump 2 can draw water from the water tank 1 and deliver it to the pressure tank 3 to form high-pressure water. The main inlet water pipe 4 is connected to the pressure tank 3. One end of the inlet branch pipe 41 is connected to the main inlet water pipe 4 via an inlet connector 5, and the other end of the inlet branch pipe 41 can be connected to the gas storage tank to be tested. The inlet connector 5 is located near the main inlet water pipe. The end of pipe 4 is provided with an inlet valve 51, the middle of the inlet connector 5 is provided with a pressure relief port 52, a pressure relief valve 53 is provided at the pressure relief port 52, a pressure relief branch pipe 54 is connected to the pressure relief branch pipe 54, the other end of the pressure relief branch pipe 54 is connected to the pressure relief main pipe or the return water main pipe 6, one end of the return water branch pipe 61 is connected to the return water main pipe 6, a return water valve 62 is provided at the connection between each return water branch pipe 61 and the return water main pipe 6, and a water pump 7 is connected to the return water main pipe 6 to pump the water in the pipe to the water tank 1.

[0029] This pressurized testing equipment uses water as the testing medium. Utilizing its incompressibility and fluidity, it allows for direct visual observation of water leakage on the outer wall of the gas storage tank during pressurization, enabling rapid and intuitive identification of leaks at an early stage, significantly improving detection sensitivity and safety. Simultaneously, the pressure relief valve 53 and pressure relief branch pipe 54 ensure rapid pressure relief upon leak detection or after test completion, avoiding safety hazards caused by high-pressure water retention. The cooperation between the return water branch pipe 61 and the water pump 7 enables efficient recovery of wastewater after testing, reducing water waste.

[0030] like Figure 1 and Figure 2As shown, the end of the water inlet connector 5 near the water inlet main pipe 4 is also provided with a main water inlet valve 55, which is located in front of the water inlet valve 51. A first pressure gauge 56 is provided between the main water inlet valve 55 and the water inlet valve 51. A second pressure gauge 57 is provided at the end of the water inlet connector 5 away from the water inlet valve 51, which is located behind the pressure relief port 52. This pressurization testing device, by installing a first pressure gauge 56 between the main inlet valve 55 and the inlet valve 51, can monitor the pressure changes of the main inlet pipe 4 in real time. This facilitates operators in determining whether the system is normal during calibration and the initial pressurization phase, avoiding equipment damage or testing errors caused by abnormal pressure, and improving the system's controllability and testing accuracy. Furthermore, by installing a second pressure gauge 57, this device can directly monitor the actual pressure inside the gas storage tank and compare it with the first pressure gauge 56, thereby more accurately determining whether the gas storage tank is leaking or whether the pressure is stable. This enhances the reliability of the test results and the comprehensiveness of the judgment basis. It can also determine the pressure inside the gas storage tank during depressurization, avoiding the need to disassemble the inlet branch pipe 41 when the gas storage tank pressure is too high, thus improving safety.

[0031] like Figure 3 As shown, the inlet branch pipe 41 is a high-pressure hose, comprising an inner rubber layer 411, a reinforcing layer 412, and an outer rubber layer 413 arranged sequentially from the inside out. The inner rubber layer 411 is made of synthetic rubber, the outer rubber layer 413 is made of rubber, and the reinforcing layer 412 is made of 1-8 layers of high-strength braiding or winding. Explosion-proof connectors 414 are connected to both ends of the inlet branch pipe 41. One explosion-proof connector 414 is fixedly connected and communicates with the inlet connector 5, while the other explosion-proof connector 414 can be detachably fixed and communicated with the air inlet of the gas storage tank. This pressurization testing equipment, by adopting a multi-layered high-pressure hose and explosion-proof connectors 414, significantly enhances the pressure resistance and explosion-proof performance of the inlet branch pipe 41, enabling safe and reliable water delivery under high-pressure environments. Simultaneously, the detachable design of the explosion-proof connectors 414 facilitates quick connection and disassembly of the gas storage tank, improving operational efficiency and equipment applicability. The synthetic rubber of the inner rubber layer 411 can be NBR (nitrile butadiene rubber), EPDM (ethylene propylene diene monomer rubber), or polyurethane. The rubber material of the outer rubber layer 413 can be CR (chloroprene rubber), EPDM, or PVC. The inner rubber layer 411 is in direct contact with the high-pressure water being transported, ensuring smooth flow of the high-pressure water. The outer rubber layer 413 protects the internal steel wire from wear, corrosion, or external impact, thus improving the service life of the inlet branch pipe 41.

[0032] Furthermore, the diameter of the return water branch pipe 61 is smaller than the diameter of the air inlet of the air storage tank, allowing the return water branch pipe 61 to be inserted into the air storage tank through the air inlet. This pressurized testing equipment, by designing the return water branch pipe 61 as a thin tube structure that can be inserted into the air storage tank, can more thoroughly extract residual moisture from the tank, avoiding the impact of water accumulation on subsequent testing or the use of the air storage tank, while also improving the efficiency of wastewater recovery and the overall cleanliness of the system.

[0033] like Figure 1 As shown, a partition 11 is installed inside the water tank 1, dividing the water tank 1 into a recycling tank 12 and a purified water tank 13. The return water main pipe 6 is connected to the recycling tank 12, and the booster pump 2 is connected to the purified water tank 13. A delivery pump 8 is installed above the water tank 1 to pump water from the top of the recycling tank 12 to the purified water tank 13. This pressurized testing equipment divides the water tank 1 into a recycling tank 12 and a purified water tank 13 through the partition 11 and is equipped with a delivery pump 8, realizing the sedimentation, purification, and recycling of the testing water. This not only saves water resources but also avoids environmental pollution caused by direct discharge of wastewater, meeting the requirements of green manufacturing and sustainable development.

[0034] The working process of this pressure testing equipment is as follows: The booster pump 2 draws water from the water purification tank 13 and delivers it to the pressure tank 3 to form high-pressure water. The air inlet of the gas storage tank to be tested is reliably connected to the water inlet branch pipe 41. Then, the main water inlet valve 55 and the water inlet valve 51 are opened in sequence, and the pressure relief valve 53 is closed, so that the high-pressure water in the pressure tank 3 is injected into the gas storage tank through the main water inlet pipe 4 and the water inlet branch pipe 41. After the gas storage tank is filled with water, its air outlet is closed, and high-pressure water is continued to be injected to gradually increase the pressure inside the tank. During this pressurization process, the sealing performance can be directly judged by observing whether water seeps out of the outer wall of the gas storage tank. If there is water seepage, it indicates that there is a leak, and the water inlet valve 51 should be closed immediately. If there is no water seepage, the pressurization continues until the reading of the second pressure gauge 57 reaches the predetermined pressure. Then, the water inlet valve 51 is closed and the pressure is maintained for a certain period of time. During this period, the water seepage situation and the change of the reading of the second pressure gauge 57 are continuously observed to further confirm the sealing performance.

[0035] After the pressure holding is completed, open the pressure relief valve 53 to safely release the pressure in the gas storage tank through the pressure relief branch pipe 54 and the return water main pipe 6 or the pressure relief main pipe. After the pressure in the tank returns to normal pressure, disconnect the connection between the inlet branch pipe 41 and the gas storage tank, insert the return water branch pipe 61 into the gas storage tank through the air inlet, open the return water valve 62, and start the water pump 7 to pump the residual water in the gas storage tank to the recycling tank 12 through the return water branch pipe 61 and the return water main pipe 6. After the wastewater is treated by sedimentation in the recycling tank 12, it is then transported to the clean water tank 13 by the conveying water pump 8 to realize the recycling of water resources.

[0036] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. A pressure testing device for a gas storage tank, characterized in that: Includes a water tank (1), a booster pump (2), a pressure tank (3), a main inlet pipe (4), a main return pipe (6), and multiple inlet branch pipes (41) and multiple return branch pipes (61). The booster pump (2) can pump water from the water tank (1) and deliver it to the pressure tank (3) to form high-pressure water. The main inlet pipe (4) is connected to the pressure tank (3). One end of the inlet branch pipe (41) is connected to the main inlet pipe (4) through an inlet connector (5). The other end of the inlet branch pipe (41) can be connected to the gas storage tank to be tested. The end of the inlet connector (5) near the main inlet pipe (4) An inlet valve (51) is provided, and a pressure relief port (52) is provided in the middle of the inlet connector (5). A pressure relief valve (53) is provided at the pressure relief port (52). A pressure relief branch pipe (54) is connected to the pressure relief port (52). The other end of the pressure relief branch pipe (54) is connected to the pressure relief main pipe or the return water main pipe (6). One end of the return water branch pipe (61) is connected to the return water main pipe (6). A return water valve (62) is provided at the connection between each return water branch pipe (61) and the return water main pipe (6). A water pump (7) is connected to the return water main pipe (6) to pump water in the pipe to the water tank (1).

2. The pressure testing device for a gas storage tank according to claim 1, characterized in that: The water inlet connector (5) is also provided with a main water inlet valve (55) at the end near the main water inlet pipe (4). The main water inlet valve (55) is located in front of the water inlet valve (51). A first pressure gauge (56) is provided between the main water inlet valve (55) and the water inlet valve (51).

3. The pressure testing device for a gas storage tank according to claim 2, characterized in that: The end of the water inlet connector (5) away from the water inlet valve (51) is provided with a second pressure gauge (57), which is located behind the pressure relief port (52).

4. A pressure testing device for a gas storage tank according to any one of claims 1-3, characterized in that: The water inlet branch pipe (41) is a high-pressure hose, which includes an inner rubber layer (411), a reinforcing layer (412) and an outer rubber layer (413) arranged sequentially from the inside to the outside. The inner rubber layer (411) is made of synthetic rubber, the outer rubber layer (413) is made of rubber, and the reinforcing layer (412) is made of 1-8 layers of high-strength braiding or winding. The two ends of the water inlet branch pipe (41) are respectively connected to explosion-proof connectors (414). One explosion-proof connector (414) is fixedly connected and communicates with the water inlet connector (5), and the other explosion-proof connector (414) can be detachably fixed and communicated with the air inlet of the gas storage tank.

5. A pressure testing device for a gas storage tank according to any one of claims 1-3, characterized in that: The diameter of the return water branch pipe (61) is smaller than the diameter of the air inlet of the gas storage tank, and the return water branch pipe (61) can be inserted into the gas storage tank through the air inlet.

6. A pressure testing device for a gas storage tank according to any one of claims 1-3, characterized in that: The water tank (1) is equipped with a partition (11) that divides the water tank (1) into a recycling pool (12) and a clean water pool (13). The return water main pipe (6) is connected to the recycling pool (12), and the booster pump (2) is connected to the clean water pool (13). A water pump (8) is installed above the water tank (1) to pump water from the top of the recycling pool (12) to the clean water pool (13).

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