Pressure vessel testing device and method

Abstract

The invention provides a pressure vessel testing device and method, relates to the field of pressure vessel testing, and aims to solve the problem that an existing annular pressure vessel is inconvenient to test air tightness and strain performance, the annular pressure vessel is fixed in a testing box through a supporting assembly, and an inner ring of the annular pressure vessel is supported; the strain gauges are respectively arranged on the inner ring and the outer ring of the pressure vessel which easily generates strain, the strain performance of the pressure vessel is measured, the pressure vessel is immersed after water is injected into the test box, liquid is used for protection during strain performance test, the air tightness of the pressure vessel is conveniently measured, and the test requirement of the annular pressure vessel is met.

Description

Technical Field

[0001] The invention relates to the field of pressure vessel testing, and in particular to a pressure vessel testing device and method. Background Art

[0002] For pressure vessels that store high-pressure hydrogen, liquefied gas, etc., it is necessary to conduct air tightness and strain tests before leaving the factory and regularly after use. Any tiny leak in a high-pressure environment may lead to serious safety accidents, including fire or explosion. Air tightness testing can ensure that the container will not leak during storage and transportation. Fuel leakage may not only cause fire or explosion, but also pollute the environment. Air tightness testing helps protect the environment and prevent stored gases from escaping into the atmosphere. By detecting and repairing leaks, the service life of the container can be extended, and maintenance costs and replacement frequency can be reduced. In addition, strain testing can evaluate the structural integrity of the container under actual working conditions to ensure that the container material can withstand the design pressure and temperature. By monitoring the deformation of the container under pressure, catastrophic failures caused by material fatigue, corrosion or other damage can be prevented.

[0003] A Chinese patent (publication number CN109374416B) discloses a pressure vessel burst test system and method for a liquid oxygen environment, which can test and evaluate the pressure resistance and burst performance (air tightness, strength, burst pressure, etc.) of storage tanks and gas cylinders in a liquid oxygen environment. At the same time, replacing the low-temperature medium can be applied to pressure resistance and burst tests in other low-temperature environments. It is suitable for conventional tank containers, but not for containers with special structures, such as annular pressure vessels. For annular pressure vessels, the distribution of weak points, the location of leak points, and the stress state are all very different from those of conventional tank containers. On this basis, the pressure vessel testing system in the prior art is difficult to test annular pressure vessels, which makes it difficult to conduct air tightness tests and strain tests on annular pressure vessels, which brings inconvenience to the factory testing and regular testing of annular pressure vessels during use, and there are major safety hazards. Summary of the invention

[0004] The purpose of the present invention is to provide a pressure vessel testing device and method to address the defects of the prior art. The annular pressure vessel is fixed in a test box by a supporting assembly, and supported from the inner ring of the annular pressure vessel. Strain gauges are respectively arranged on the inner ring and outer ring of the pressure vessel where strain is easily generated, and the strain performance of the pressure vessel is measured. The test box is filled with water to immerse the pressure vessel, and liquid is used for protection during the strain performance test. The air tightness of the pressure vessel is also conveniently measured, thereby meeting the testing requirements of the annular pressure vessel.

[0005] The first object of the present invention is to provide a pressure vessel testing device, which adopts the following scheme:

[0006] include:

[0007] a test box forming an open test cavity for containing a liquid in which the pressure vessel is immersed;

[0008] The support assembly includes a support rod, a support ring and a telescopic rod. The support rod is fixed in the test box. The support ring is slidably sleeved outside the support rod. At least three telescopic rods are distributed along the circumferential direction of the support ring and connected to the support ring. One end of the telescopic rod away from the support ring is connected to a claw for supporting the inner ring of the pressure vessel. The support assembly can maintain the relative position of the supported pressure vessel and the test box.

[0009] The test assembly includes a pressure gas source and a strain gauge, wherein the pressure gas source is connected to a pipeline for accessing a pressure vessel, and the strain gauge is connected to strain gauges for attaching to the inner and outer walls of the pressure vessel.

[0010] Furthermore, the axis of the telescopic rod is distributed radially along the support ring, the telescopic rod can be elastically retracted in the axial direction, and the supporting claw forms a curved surface that fits the pressure vessel on one side facing the pressure vessel.

[0011] Furthermore, a locking piece is installed on the support ring, and the locking piece can abut against the support rod to lock the relative position of the support rod and the support ring, and an elastic layer is provided on the arc surface of the supporting claw.

[0012] Furthermore, the test box is also provided with a box cover, and the box cover can block the opening of the test cavity.

[0013] Furthermore, a transparent plate is provided on the box cover, and a protective net is installed on a side of the transparent plate away from the test cavity.

[0014] Furthermore, the test box is provided with an opening through which the wires and pipelines for connecting the strain gauge to the strain gauge pass. The test box is also provided with a drain port connected to the test cavity, and the drain port is equipped with a plug.

[0015] Furthermore, a pressure regulating valve is connected in series on the pipeline, and one end of the pipeline away from the pressure gas source is connected to a quick connector for docking with a pressure container.

[0016] Furthermore, a plurality of support rods are installed in the test box, and / or a plurality of support rings are installed on the support rods of the support assembly; each support ring is connected to a corresponding telescopic rod.

[0017] A second object of the present invention is to provide a testing method for the pressure vessel testing device as described in the first object, comprising:

[0018] Fill the test chamber with water, match the pressure vessel to be tested with the claws, and place the pressure vessel outside the support ring;

[0019] Install a strain gauge on the pressure vessel and connect the pressure gas source to the pressure vessel through a pipeline;

[0020] The support ring cooperates with the support rod to arrange the pressure vessel in the test chamber and fix the pressure vessel below the water surface of the test chamber;

[0021] The pressure gas source fills the pressure vessel with high-pressure gas to test the air tightness of the pressure vessel;

[0022] By controlling the gas pressure filled into the pressure vessel, the strain data of the pressure vessel is monitored and sent to the strain gauge;

[0023] After completing the air tightness test and strain test, the pressure vessel is removed from the support ring and replaced with the next pressure vessel to be tested.

[0024] Furthermore, when the air tightness test is performed on the pressure vessel, the position where the pipeline is connected to the pressure vessel is immersed below the water surface of the test chamber to test the air tightness of the connection position.

[0025] Compared with the prior art, the present invention has the following advantages and positive effects:

[0026] (1) In view of the problem that it is inconvenient to conduct air tightness and strain performance tests on annular pressure vessels, the annular pressure vessel is fixed in a test box through a support assembly and supported from the inner ring of the annular pressure vessel. Strain gauges are arranged on the inner and outer rings of the pressure vessel where strain is easily generated, and the strain performance of the pressure vessel is measured. The test box is filled with water to immerse the pressure vessel. Liquid is used for protection during the strain performance test, and the air tightness of the pressure vessel is conveniently measured, thereby meeting the testing requirements of the annular pressure vessel.

[0027] (2) A box cover is provided to protect the operator and prevent fragments from splashing when the pressure vessel explodes during the test. A transparent plate is provided to facilitate observation, and a protective net is used to restrain the splashing after the pressure vessel explodes. The middle support column, curved claws and support rings are used to stably support the annular pressure vessel to ensure stability during the test and jointly ensure the safety of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0029] Figure 1 Schematic diagram of the pressure vessel testing device in Examples 1 and 2 of the present invention.

[0030] Figure 2 Schematic diagram of connecting the pressure vessel in Examples 1 and 2 of the present invention to a pressure gas source.

[0031] Figure 3 Schematic diagram of the cooperation between the pressure vessel and the support assembly in Examples 1 and 2 of the present invention.

[0032] Figure 4 Schematic diagram of the support assembly in Examples 1 and 2 of the present invention.

[0033] Figure 5 Schematic diagram of the composition of the support assembly in Examples 1 and 2 of the present invention.

[0034] Figure 6 It is a schematic diagram of the pressure vessel testing device in Examples 1 and 2 of the present invention when no pressure vessel is loaded.

[0035] Figure 7 Schematic diagram of the box cover of the test box in Examples 1 and 2 of the present invention.

[0036] Among them, 1. pressure vessel; 2. support rod; 3. telescopic rod; 4. claw; 5. locking piece; 6. test box; 7. pipeline; 8. pressure regulating valve; 9. pressure gas source; 10. strain gauge; 11. protective net; 12. drain outlet; 13. box cover; 14. support ring; 15. interface; 16. strain gauge. DETAILED DESCRIPTION

[0037] Example 1

[0038] In a typical embodiment of the present invention, Figure 1-Figure 7 As shown, a pressure vessel testing device is provided.

[0039] In the prior art, the pressure vessel 1 testing system is mainly applicable to conventional tank containers, while there are testing difficulties for containers with special structures, such as the annular pressure vessel 1. Due to its unique structure, the annular pressure vessel 1 has significant differences in its weak points, leakage points and stress state from conventional tank containers. Therefore, it is difficult for the existing testing system to accurately evaluate the pressure resistance and bursting performance of the annular pressure vessel 1, including key indicators such as air tightness, strength and bursting pressure. This not only brings inconvenience to the factory testing and regular testing of the annular pressure vessel 1 during use, but also increases safety hazards. In response to the above problems, the present embodiment aims to provide a pressure vessel testing device, which can be applicable to the testing requirements of the annular pressure vessel 1, accurately evaluate its pressure resistance and bursting performance, and ensure the safety and convenience of the testing process.

[0040] like Figure 1 As shown, the pressure vessel testing device mainly includes a testing box 6, a supporting assembly and a testing assembly.

[0041] The test box 6 can form an open test cavity for storing liquid for immersing the pressure vessel 1. A stable test environment is provided during the test process, and liquid is used for protection to protect the pressure vessel 1 from interference from the external environment, thereby reducing potential safety hazards during the test process. The injected liquid can be used to complete the air tightness test of the pressure vessel 1 immersed therein. When the pressure vessel 1 leaks, bubbles will be formed in the liquid of the test box 6 to accurately detect the leak location.

[0042] like Figure 3 As shown, the support assembly includes a support rod 2, a support ring 14 and a telescopic rod 3. The support rod 2 is fixed in the test box 6, the support ring 14 is slidably mounted outside the support rod 2, and at least three telescopic rods 3 are distributed along the circumferential direction of the support ring 14 and connected to the support ring 14. One end of the telescopic rod 3 away from the support ring 14 is connected to a claw 4 for supporting the inner ring of the pressure vessel 1. Through the support assembly, the relative position of the annular pressure vessel 1 in the test box 6 can be stably fixed to ensure that the pressure vessel 1 will not be offset or deformed due to uneven force during the test. The design of the support assembly takes into account the special structure of the annular pressure vessel 1. By supporting from the inner ring, the stress state in actual work can be better simulated, thereby improving the accuracy of the test.

[0043] like Figure 4 and Figure 5 As shown, the telescopic rod 3 enables the support assembly to adapt to annular pressure vessels 1 of different sizes, thereby improving the versatility and flexibility of the test.

[0044] like Figure 2 As shown, the test assembly includes a pressure gas source 9 and a strain gauge 10. The pressure gas source 9 is connected to a pipeline 7 for accessing the pressure vessel 1, and the strain gauge 10 is connected to a strain gauge 16 for attaching to the inner and outer walls of the pressure vessel 1. The pressure gas source 9 is used to provide pressure to the pressure vessel 1 to test its pressure resistance and burst performance. The strain gauge 10 is used to measure the strain performance of the pressure vessel 1 during the pressure process, including key parameters such as strain distribution and strain size.

[0045] By testing the assembly, the pressure resistance and bursting performance of the annular pressure vessel 1 can be comprehensively evaluated, including air tightness, strength and bursting pressure, etc. At the same time, the arrangement of the strain gauge 16 helps to accurately identify the weak points and leakage points of the pressure vessel 1, providing an important basis for subsequent improvement and optimization.

[0046] like Figure 1 and Figure 6 As shown, the annular pressure vessel 1 is fixed in the test box 6 by a supporting assembly and supported from the inner ring. At the same time, strain gauges 16 are arranged on the inner ring and the outer ring of the pressure vessel 1 to measure the strain performance of the pressure vessel 1.

[0047] The strain gauge 16 is a sensor that can measure tiny deformations on the surface of an object. When the pressure vessel 1 is subjected to pressure during the test, its inner and outer walls will deform. By attaching the strain gauges 16 at these locations, the strain of the pressure vessel 1 under stress can be monitored in real time, including the size, direction and distribution of the strain.

[0048] According to the measurement results of the strain gauge 16, the safety performance of the pressure vessel 1 can be evaluated. For example, if the strain value exceeds the allowable strain value of the material, it may cause the pressure vessel 1 to be damaged. Therefore, by monitoring the strain condition, potential safety hazards can be discovered in time to ensure the safe operation of the pressure vessel 1. During the design and manufacturing process of the pressure vessel 1, its structure needs to be optimized to improve the bearing capacity and safety performance. By attaching the strain gauge 16 at different positions, more comprehensive strain data can be obtained to provide a scientific basis for structural design. For example, structural parameters such as wall thickness and reinforcing ribs can be adjusted according to the strain distribution to improve the overall performance of the pressure vessel 1.

[0049] The inner and outer walls of the pressure vessel 1 are the most critical stress-bearing areas. During the test, these areas are subject to greater pressure and tension, and are therefore prone to deformation. By attaching strain gauges 16 at these locations, more accurate strain data can be obtained to reflect the actual stress state of the pressure vessel 1. The pressure vessel 1 usually has a regular geometric shape and size, which makes the installation and monitoring of the strain gauge 16 more convenient. When attaching the strain gauge 16 to the inner and outer walls, it can be ensured that the strain gauge 16 fits tightly to the surface of the pressure vessel 1, thereby improving the accuracy and reliability of the measurement. In order to fully understand the strain of the pressure vessel 1, it is necessary to attach strain gauges 16 at multiple locations. By attaching strain gauges 16 at different locations on the inner and outer walls, more comprehensive strain data can be obtained, providing a more sufficient basis for the safety assessment and performance optimization of the pressure vessel 1.

[0050] After the test box 6 is filled with water, the pressure vessel 1 is immersed, and the liquid is used for protection, and it is convenient to measure the air tightness of the pressure vessel 1. This design not only meets the testing requirements of the annular pressure vessel 1, but also improves the accuracy and safety of the test. In addition, the design of the support component and the test component enables the device to be applicable to annular pressure vessels 1 of different sizes, improving the versatility and flexibility of the test. The pressure resistance and bursting performance of the annular pressure vessel 1 can be accurately evaluated, while ensuring the safety and convenience of the test process. It provides an effective solution to the problems existing in the prior art.

[0051] In this embodiment, Figure 1 and Figure 2As shown, the annular pressure vessel 1 generally has good pressure distribution characteristics due to its unique structural design, but there are still some potential weak points or weak positions, which are more susceptible to damage under high pressure. Therefore, in addition to the strain gauges 16 attached to the inner and outer walls of the pressure vessel 1, strain gauges 16 can also be attached to the following weak positions or areas for targeted strain measurement.

[0052] For example, in the welding area, welding is a key step in the manufacturing process of the annular pressure vessel 1. There may be welding defects at the welded joints, such as cracks, incomplete penetration, pores, slag inclusions, etc. These defects may become stress concentration points under high pressure and cause damage. For example, openings and pipe connections, openings and pipe connections on the pressure vessel 1, such as pipe connections, observation windows, etc., due to the sudden change in geometric shape, the stress distribution in these areas may be uneven, which is prone to stress concentration. For example, in the heat affected zone (HAZ), during the welding process, the material properties of the heat affected zone may change, such as increased hardness and reduced toughness, etc. These changes make the wall of the pressure vessel 1 in this area more susceptible to damage under high pressure. For example, material defects, material defects that may occur in the raw materials or during the manufacturing process, such as inclusions, delamination, cracks, etc., these defects may be magnified under high pressure, resulting in reduced strength of the container. For example, in the corrosion or erosion area, long-term contact with corrosive media or corrosive environments may cause the wall thickness of the container to be thinned, and these areas are more susceptible to damage under high pressure. For example, geometric mutation areas. Geometric mutations in the design of pressure vessels 1, such as flanges, joints between heads and shells, may become weak points due to the discontinuity of stress distribution.

[0053] The strain gauges 16 attached to the inner and outer walls of the pressure vessel 1 are mainly used to monitor strain conditions, evaluate safety performance, and optimize structural design. These locations are selected because they are located in critical stress areas, are easy to install and monitor, and meet comprehensive monitoring requirements. Reasonable arrangement and monitoring of the strain gauges 16 can ensure safe operation of the pressure vessel 1 and improve its overall performance.

[0054] In order to ensure the safe operation of the annular pressure vessel 1, strict quality control is implemented during the manufacturing process to ensure welding quality and avoid material defects. Regular non-destructive testing (such as ultrasonic testing, radiographic testing, etc.) is performed on the container to detect potential defects and damage. Consider stress distribution in the design stage, avoid geometric mutations and stress concentration, and select appropriate materials and wall thickness. Take appropriate anti-corrosion measures such as coatings, cathodic protection, etc. to prevent corrosion or erosion. Conduct detailed stress analysis to identify potential weak points and take corresponding strengthening measures.

[0055] like Figure 4As shown, the axis of the telescopic rod 3 is radially distributed along the support ring 14, and the telescopic rod 3 extends outward from the support ring 14 and is directly connected to the claw 4. This ensures that the claw 4 can stably support the inner ring of the pressure vessel 1, while allowing the telescopic rod 3 to elastically expand and contract in the axial direction to adapt to pressure vessels 1 of different diameters.

[0056] The elastic expansion and contraction function of the telescopic rod 3 not only improves the adaptability of the device, but also can absorb and disperse the stress generated by the pressure vessel 1 during the test to a certain extent, protecting the pressure vessel 1 from damage. In addition, the side of the claw 4 facing the pressure vessel 1 forms an arc surface that fits the pressure vessel 1, further enhancing the stability and support effect of the claw 4.

[0057] In the pressure vessel testing device provided in this embodiment, the main function of the telescopic rod 3 is to connect the support ring 14 and the claw 4 to achieve stable support for the inner ring of the pressure vessel 1. The telescopic rod 3 needs to bear the weight of the pressure vessel 1 and various forces and moments that may be generated during the test, so it must have sufficient strength and rigidity to ensure the stability and safety of the support. The telescopic rod 3 needs to have reliable telescopic performance to adapt to the support requirements of different diameters and pressure vessels 1. This can be achieved through built-in springs, air pressure or hydraulic components, such as gas springs, telescopic elastic rods with springs, etc.

[0058] One end of the telescopic rod 3 needs to be connected to the support ring 14, and the other end needs to be connected to the claw 4. The connection method needs to be firm and reliable to ensure that it will not loosen or fall off during the test. In order to facilitate the adjustment of the length of the telescopic rod 3 and lock its position, an adjustment knob or a locking mechanism may also be provided on the telescopic rod 3.

[0059] Based on this, in this embodiment, the telescopic rod 3 can be a spring-type telescopic rod 3, which is provided with a spring inside, and the length is adjusted by compressing or stretching the spring. The spring-type telescopic rod 3 has a simple structure and low cost, but has a limited telescopic range and carrying capacity.

[0060] Alternatively, a pneumatic / hydraulic telescopic rod 3 may be used to adjust the length of the rod by pneumatic or hydraulic means. The pneumatic / hydraulic telescopic rod 3 has the advantages of a large telescopic range and a strong carrying capacity.

[0061] like Figure 4As shown, the claw 4 is an important component in the pressure vessel testing device, and its main function is to support and fix the pressure vessel 1 to ensure that the pressure vessel 1 can remain stable during the test. The claw 4 forms an arc surface that fits the pressure vessel 1 on the side facing the pressure vessel 1, which can ensure that the claw 4 and the pressure vessel 1 fit tightly, reduce stress concentration, and improve the stability and safety of the support. The claw 4 is usually made of high-strength, corrosion-resistant materials, such as stainless steel, alloy steel, etc., to ensure that it can withstand various forces and moments generated during the test. The claw 4 can be designed to be rotatable and can adapt to pressure vessels 1 of different shapes by adjusting the angle. The claw 4 can also be movably mounted on the telescopic rod 3 through a structure such as a ball joint.

[0062] In some high-pressure or heavy-load test scenarios, the claw 4 can also enhance its load-bearing capacity and stability by adopting a reinforced structure, including increasing the thickness of the claw 4, using higher-strength materials, adding support points or reinforcing ribs, etc., which can significantly improve the stiffness and load-bearing capacity of the claw 4 and ensure that it will not be deformed or damaged during the test.

[0063] like Figure 5 As shown, the locking member 5 installed on the support ring 14 can abut the support rod 2, thereby locking the relative position of the support rod 2 and the support ring 14. The stability of the support assembly during the test is ensured, and the loosening or displacement of the support assembly caused by vibration or external force interference is prevented. The elastic layer provided on the curved surface of the claw 4 can increase the contact area between the claw 4 and the pressure vessel 1, and improve the stability and comfort of the support. At the same time, the elastic layer can also reduce the wear and scratches of the claw 4 on the surface of the pressure vessel 1 to a certain extent.

[0064] The box cover 13 provided on the test box 6 can block the opening of the test cavity to prevent liquid from splashing out or external impurities from entering the test cavity during the test, which helps to keep the test environment clean and stable and improve the accuracy of the test. Figure 7 As shown, a transparent plate is provided on the box cover 13, and a protective net 11 is installed on the side of the transparent plate away from the test chamber. The transparent plate provided on the box cover 13 allows the operator to observe the test process without opening the box cover 13, and the protective net 11 installed on the side of the transparent plate away from the test chamber can prevent the operator from directly contacting the liquid or pressure vessel 1 in the test chamber, and intercept the splashing of debris caused by the explosion, so as to ensure the safety of operation.

[0065] like Figure 1 As shown, the openings on the test box 6 are used to supply the wires and pipes 7 for connecting the strain gauge 10 to the strain gauge 16. The drain port 12 on the test box 6 is equipped with a plug to drain the liquid in the test cavity after the test. This design facilitates the cleaning and maintenance of the test cavity and ensures the stability of the liquid during the test.

[0066] like Figure 2 As shown, the pressure regulating valve 8 connected in series on the pipeline 7 can adjust the gas pressure entering the pressure vessel 1, thereby realizing accurate testing of the pressure resistance and bursting performance of the pressure vessel 1, and improving the flexibility and accuracy of the test. The quick connector for docking the pressure vessel 1 connected to the end of the pipeline 7 away from the pressure gas source 9 can conveniently connect and disconnect the connection between the pressure vessel 1 and the pipeline 7, and the pressure vessel 1 is provided with an interface 15 for docking the quick connector, which improves the convenience and efficiency of the test.

[0067] The multiple support rods 2 installed in the test box 6 are spaced apart, and the pressure vessels 1 carried on different support rods 2 do not interfere with each other. Multiple support rings 14 can also be installed on the same support rod 2 of the support assembly, so that the same support rod 2 can carry multiple pressure vessels 1 for testing, and the multiple pressure vessels 1 carried on the same support rod 2 are spaced apart so that they do not interfere with each other.

[0068] In the scenario where multiple pressure vessels 1 need to be tested simultaneously, the traditional single support structure often cannot meet the requirements. The design of multiple support rods 2 and support rings 14 can effectively support multiple pressure vessels 1 by increasing support points and dispersing stress. In this way, testers can place multiple pressure vessels 1 in the same test box 6 for testing at the same time, thereby greatly improving the test efficiency.

[0069] In practical applications, the size and weight of the pressure vessel 1 are often different. The design of the multiple support rods 2 and the support ring 14 can be adjusted and optimized according to the specific size and weight of the pressure vessel 1. For example, for a larger or heavier pressure vessel 1, the number and density of the support rods 2 and the support ring 14 can be increased so that the support ring 14 can match the multiple support rods 2 to jointly support the pressure vessel 1 to improve the stability and load-bearing capacity of the support. For a smaller or lighter pressure vessel 1, the number and density of the support rods 2 and the support ring 14 can be appropriately reduced to reduce the test cost and improve the test flexibility.

[0070] In this embodiment, Figure 1-Figure 7As shown, the pressure vessel testing device not only improves the test accuracy of the annular pressure vessel 1, but also enhances the safety and convenience of the test process. The designs of the telescopic rod 3, the locking piece 5, the elastic layer, etc. improve the adaptability and stability of the device; the designs of the box cover 13, the transparent plate, etc. ensure the cleanliness of the test environment and the safety of observation; the designs of the openings and the drain 12 facilitate the connection of the test components and the cleaning of the test chamber; the designs of the pipeline 7 and the pressure regulating valve 8 improve the flexibility and accuracy of the test. In addition, the design of multiple support rods 2 and support rings 14 further enhances the support capacity and safety of the device. Together, they constitute an efficient, safe and accurate pressure vessel testing device, which provides a strong guarantee for the factory testing of the annular pressure vessel 1 and the regular testing during use.

[0071] Example 2

[0072] In another typical embodiment of the present invention, Figure 1-Figure 7 As shown, a testing method for a pressure vessel testing device is provided, using the pressure vessel testing device as in Example 1.

[0073] A testing method for a pressure vessel testing device, comprising:

[0074] Fill the test chamber with water, and match the pressure vessel 1 to be tested with the claws 4 so that the pressure vessel 1 is sleeved outside the support ring 14;

[0075] Install a strain gauge 16 on the pressure vessel 1 and connect the pressure gas source 9 to the pressure vessel 1 through the pipeline 7;

[0076] The support ring 14 cooperates with the support rod 2 to arrange the pressure vessel 1 in the test chamber and fix the pressure vessel 1 below the water surface of the test chamber;

[0077] The pressure gas source 9 fills the pressure vessel 1 with high-pressure gas to test the air tightness of the pressure vessel 1;

[0078] By controlling the gas pressure filled into the pressure vessel 1, the strain data of the pressure vessel 1 is monitored and sent to the strain gauge 10;

[0079] After the air tightness test and the strain test are completed, the pressure vessel 1 is removed from the support ring 14 and replaced with the next pressure vessel 1 to be tested.

[0080] When the air tightness test is performed on the pressure vessel 1, the position where the pipeline 7 is connected to the pressure vessel 1 is immersed below the water surface of the test chamber to test the air tightness of the connection position.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pressure vessel testing device, characterized in that: include: a test box forming an open test cavity for containing a liquid in which the pressure vessel is immersed; The support assembly includes a support rod, a support ring and a telescopic rod. The support rod is fixed in the test box. The support ring is slidably sleeved outside the support rod. At least three telescopic rods are distributed along the circumferential direction of the support ring and connected to the support ring. One end of the telescopic rod away from the support ring is connected to a claw for supporting the inner ring of the pressure vessel. The support assembly can maintain the relative position of the supported pressure vessel and the test box. The test assembly includes a pressure gas source and a strain gauge, wherein the pressure gas source is connected to a pipeline for accessing a pressure vessel, and the strain gauge is connected to strain gauges for attaching to the inner and outer walls of the pressure vessel.

2. The pressure vessel testing device according to claim 1, characterized in that: The axis of the telescopic rod is distributed radially along the support ring, the telescopic rod can be elastically extended and retracted in the axial direction, and the supporting claws are facing the side of the pressure vessel to form an arc surface that fits the pressure vessel.

3. The pressure vessel testing device according to claim 2, characterized in that: A locking piece is installed on the support ring, and the locking piece can abut against the support rod to lock the relative position of the support rod and the support ring. An elastic layer is provided on the arc surface of the supporting claw.

4. The pressure vessel testing device according to claim 1, characterized in that: The test box is also provided with a box cover, which can block the opening of the test cavity.

5. The pressure vessel testing device according to claim 4, characterized in that: A transparent plate is arranged on the box cover, and a protective net is installed on a side of the transparent plate away from the test cavity.

6. The pressure vessel testing device according to claim 1, characterized in that: The test box is provided with an opening through which the wires and pipelines for connecting the strain gauge to the strain gauge pass. The test box is also provided with a drain port connected to the test cavity, and the drain port is equipped with a plug.

7. The pressure vessel testing device according to claim 6, characterized in that: A pressure regulating valve is connected in series on the pipeline, and one end of the pipeline away from the pressure gas source is connected with a quick connector for docking with a pressure container.

8. The pressure vessel testing device according to claim 1, characterized in that: A plurality of support rods are installed in the test box, and / or a plurality of support rings are installed on the support rods of the support assembly; each support ring is connected to a corresponding telescopic rod.

9. A method for testing a pressure vessel testing device, using the pressure vessel testing device as claimed in any one of claims 1 to 8, characterized in that: include: Fill the test chamber with water, match the pressure vessel to be tested with the claws, and place the pressure vessel outside the support ring; Install a strain gauge on the pressure vessel and connect the pressure gas source to the pressure vessel through a pipeline; The support ring cooperates with the support rod to arrange the pressure vessel in the test chamber and fix the pressure vessel below the water surface of the test chamber; The pressure gas source fills the pressure vessel with high-pressure gas to test the air tightness of the pressure vessel; By controlling the gas pressure filled into the pressure vessel, the strain data of the pressure vessel is monitored and sent to the strain gauge; After completing the air tightness test and strain test, the pressure vessel is removed from the support ring and replaced with the next pressure vessel to be tested.

10. The testing method of the pressure vessel testing device according to claim 9, characterized in that: When testing the air tightness of a pressure vessel, immerse the location where the pipeline connects to the pressure vessel below the water surface in the test chamber to test the air tightness of the connection location.

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