Ultralow temperature safety valve testing device

Abstract

The utility model relates to an ultralow temperature safety valve testing device, comprising a low temperature box used for providing a low temperature environment; test fluid is stored in the working tank, and the working tank is arranged in the low-temperature box and is connected with an inlet of the tested safety valve through a test tool so as to provide the test fluid for the tested safety valve; the pressure gauge and the first thermometer are arranged at the inlet of the tested safety valve and are respectively used for measuring the pressure and the temperature of the test fluid flowing into the tested safety valve; and the height testing device is positioned right above the tested safety valve and is used for measuring the opening height of the tested safety valve. The ultra-low temperature safety valve testing device is suitable for testing of ultra-low temperature safety valves in the ship field. According to the invention, the speed and the convenience of testing are obviously improved, and the used testing fluid can be effectively recycled and reused, so that the cost is saved while the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of ultra-low temperature safety valves, in particular to an ultra-low temperature safety valve testing device. Background Art

[0002] With the transformation of the global energy structure and the improvement of environmental protection awareness, liquefied natural gas (LNG) has gradually become one of the important energy sources due to its clean and efficient characteristics. LNG ships, as professional ships for transporting liquefied natural gas, have been widely used in the domestic and foreign shipping industries in recent years. Since LNG needs to be stored and transported at extremely low temperatures, usually around -163°C, the equipment used on LNG ships, especially safety valves, must be able to withstand the test of ultra-low temperature environments.

[0003] At present, as a key component to ensure the safe operation of LNG ships, the performance of ultra-low temperature safety valves directly affects the safety of ships. Due to the lack of effective testing equipment, it is difficult to evaluate the performance of safety valves under ultra-low temperature conditions, which limits the development of ultra-low temperature safety valve technology.

[0004] Existing test equipment often cannot simulate the real ultra-low temperature environment on LNG ships, or it is difficult to accurately control and measure the key parameters of the safety valve during the test, such as opening height, fluid pressure and temperature. These problems lead to inaccurate evaluation of safety valve performance, which in turn affects the design and improvement of ultra-low temperature safety valves.

[0005] In view of the above problems, it is urgent to design a test device that can simulate the ultra-low temperature environment of LNG ships. The device should be able to accurately control and measure the performance parameters of the safety valve under ultra-low temperature conditions. Through such a test device, the performance of the safety valve can be evaluated more accurately, thereby promoting the localization of ultra-low temperature safety valve technology, reducing dependence on imported technology, and improving the safety and economy of LNG ships. Utility Model Content

[0006] The utility model provides an ultra-low temperature safety valve test device, which aims to solve the problems existing in the prior art and conduct a comprehensive performance test on the safety valve by accurately simulating the ultra-low temperature environment of the LNG ship. The test device includes components such as a cryogenic box, a working tank, a test fixture, a pressure gauge, a thermometer, and an opening height test device, which can accurately evaluate the performance of the safety valve under ultra-low temperature conditions. In addition, it also includes a recovery module to achieve the recovery and reuse of the test fluid, improve the test efficiency, and reduce the test cost.

[0007] Specifically, the ultra-low temperature safety valve testing device comprises:

[0008] Low temperature box, used to provide ultra-low temperature environment;

[0009] A working tank, which stores a test fluid, is placed in the low temperature box and is connected to the inlet of the safety valve to be tested through a test fixture to provide the test fluid to the safety valve to be tested;

[0010] A pressure gauge and a first thermometer, both disposed at the inlet of the safety valve under test, and used to measure the pressure and temperature of the test fluid flowing into the safety valve under test, respectively;

[0011] The height testing device is located directly above the safety valve under test and is used to measure the opening height of the safety valve under test.

[0012] Furthermore, the ultra-low temperature safety valve testing device also includes:

[0013] A recovery module is connected to the working tank and is used to recover the test fluid.

[0014] Preferably, the recycling module comprises:

[0015] a heating unit connected to the working tank and used for heating the test fluid flowing from the working tank to the recovery module;

[0016] a pressurizing unit connected to the heating unit and used to pressurize the test fluid flowing out of the heating unit;

[0017] The storage device is connected to the increasing unit and is used for storing the test fluid flowing out of the boosting unit.

[0018] Furthermore, the ultra-low temperature safety valve testing device also includes a second thermometer, which is installed on the top of the heating unit and is used to monitor the temperature of the heating unit. The power of the heating unit can be adjusted according to the measurement value of the second thermometer.

[0019] Preferably, a third thermometer is provided between the heating unit and the adding module, and the third thermometer is used to monitor the temperature of the test fluid flowing out of the heating unit.

[0020] Furthermore, the ultra-low temperature safety valve testing device further comprises a cold source, which is connected to the low temperature box and the testing tooling through a pipeline, and the pipeline is provided with a switch valve, a safety valve, a first ball valve and a second ball valve;

[0021] The switch valve and the safety valve are located on the main line, the first ball valve is located on the first branch line connected to the low temperature box, and the second ball valve is located on the second branch line connected to the test fixture.

[0022] Preferably, the cold source is liquid nitrogen.

[0023] Preferably, the test fixture is provided with an interlayer, which is connected to the cold source, and the cold source in the interlayer is used to maintain the temperature of the test fluid passing through the test fixture.

[0024] Preferably, the test fluid is helium.

[0025] Preferably, the height testing device measures the opening height of the safety valve being tested by infrared rays.

[0026] The utility model provides a cryogenic safety valve testing device, which is used for testing the cryogenic safety valve of a ship, and greatly improves the test speed and convenience. The test fluid can also be recycled, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the ultra-low temperature safety valve testing device of the utility model. DETAILED DESCRIPTION

[0028] The following is a further detailed description of a super-low temperature safety valve testing device proposed by the utility model in combination with the accompanying drawings and specific implementation methods. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation method of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so it has no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effect that the utility model can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the utility model.

[0029] See also Figure 1The utility model provides an ultra-low temperature safety valve test device, which is mainly composed of the following parts: a cryogenic box 1, which is used to provide an ultra-low temperature (below -163°C) environment; a working tank 2, which stores a test fluid and is placed inside the cryogenic box 1 to keep the test fluid in an ultra-low temperature state. The working tank 2 is connected to the inlet of the safety valve 4 under test through a test fixture 3 to supply the test fluid to the safety valve 4 under test. In addition, a pressure gauge 5 and a first thermometer 6 are also installed at the inlet of the safety valve 4 under test, which are respectively used to measure the pressure and temperature of the test fluid entering the safety valve 4 under test to confirm whether the pressure and temperature of the test fluid entering the safety valve 4 under test meet the test requirements. In order to measure the opening height of the safety valve 4 under test, the test device also includes a height test device 8, which is located directly above the safety valve 4 under test, and can be an infrared distance sensor, which is used to measure whether the opening height meets the design requirements. The safety valve 4 under test mentioned in this application is an ultra-low temperature spring fully open safety valve. The opening height refers to the actual stroke of the valve disc leaving the closed position. The height is the specific value of the stroke. An opening height greater than 1 / 4 of the flow channel is considered to have reached the fully open state.

[0030] In addition, the ultra-low temperature safety valve test device further includes a recovery module 7, which is connected to the working tank 2 and is responsible for recovering the test fluid. In this embodiment, the test fluid is helium. Since helium has a high economic value, the utility model designs a recovery module 7 to recover helium, thereby reducing the test cost.

[0031] In order to optimize the recovery process, the recovery module 7 includes the following components: a heating unit 71, which is connected to the working tank 2 through a pipeline, and the purpose is to heat the test fluid (helium) in the working tank 2 flowing to the recovery module 7; a booster unit 72, which is connected after the heating unit 71, and its function is to increase the pressure of the heated helium; and a storage 73, which is located downstream of the booster unit 72 and is used to store the pressurized helium. The storage 73 can be a helium tank. In order to prevent the recovered helium from being too cold and causing the tank to be damaged by low temperature, the helium needs to be heated during the recovery process.

[0032] In order to more accurately control the heating process, the recovery module 7 also includes a second thermometer 74, which is installed on the top of the heating unit 71 and is used to monitor the temperature of the heating unit 71 in real time and adjust the power output of the heating unit 71 accordingly. If the temperature is too low, the power output of the heating unit 71 can be increased, wherein the heating unit 71 is preferably an electric heating unit.

[0033] In order to further ensure the temperature control of the helium, preferably, a third thermometer 75 is installed between the heating unit 71 and the pressurizing unit 72 to monitor the temperature of the test fluid flowing out of the heating unit 71 in real time, and further ensure that the temperature of the helium flowing into the helium tank meets the requirements.

[0034] In addition, the ultra-low temperature safety valve test device also integrates a cold source 9, which can be liquid nitrogen, and its boiling point is -196 ° C (lower than -163 ° C). Liquid nitrogen is stored in a liquid nitrogen tank, which is connected to the cryogenic box 1 and the test tool 3 through a series of pipelines, and continuously supplies liquid nitrogen to the cryogenic box 1 and the test tool 3 to maintain an ultra-low temperature environment. These pipelines are equipped with a variety of valves, including a switch valve 91 and a safety valve 92, which are all installed on the main pipeline to control the conduction and safety of the main pipeline. In addition, the first ball valve 93 and the second ball valve 94 are respectively installed on the branch pipelines connecting the cryogenic box 1 and the test tool 3 to adjust the liquid nitrogen flow of each branch. Among them, the test tool 3 is designed with an interlayer 31, and the part within the interlayer 31 is connected to the test fluid, and the interlayer 31 is connected to the cold source 9, and the cold source 9 in the interlayer 31 surrounds the periphery of the test fluid. The flow of liquid nitrogen in the interlayer 31 is controlled by the second ball valve 94 , so as to further maintain the low temperature state of the test fluid flowing through the test fixture 3 .

[0035] The ultra-low temperature safety valve test device provided by the utility model is particularly suitable for testing ultra-low temperature safety valves in the field of ships. It significantly improves the speed and convenience of testing, and can effectively recycle and reuse the used test fluid, thereby improving efficiency and achieving cost savings.

[0036] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A cryogenic safety valve testing device, characterized in that: include: Low temperature box, used to provide ultra-low temperature environment; A working tank, which stores a test fluid, is placed in the low temperature box and is connected to the inlet of the safety valve to be tested through a test fixture to provide the test fluid to the safety valve to be tested; A pressure gauge and a first thermometer, both disposed at the inlet of the safety valve under test, and used to measure the pressure and temperature of the test fluid flowing into the safety valve under test, respectively; The height testing device is located directly above the safety valve under test and is used to measure the opening height of the safety valve under test.

2. The ultra-low temperature safety valve testing device according to claim 1, characterized in that: Also includes: A recovery module is connected to the working tank and is used to recover the test fluid.

3. The ultra-low temperature safety valve testing device according to claim 2, characterized in that: The recovery module comprises: a heating unit connected to the working tank and used for heating the test fluid flowing from the working tank to the recovery module; a pressurizing unit connected to the heating unit and used to pressurize the test fluid flowing out of the heating unit; The storage device is connected to the pressurizing unit and is used for storing the test fluid flowing out of the pressurizing unit.

4. The ultra-low temperature safety valve testing device according to claim 3, characterized in that: It also includes a second thermometer, which is installed on the top of the heating unit and is used to monitor the temperature of the heating unit. The power of the heating unit can be adjusted according to the measurement value of the second thermometer.

5. The ultra-low temperature safety valve testing device according to claim 3, characterized in that: A third thermometer is disposed between the heating unit and the pressurizing unit, and the third thermometer is used to monitor the temperature of the test fluid flowing out of the heating unit.

6. The ultra-low temperature safety valve testing device according to claim 1, characterized in that: It also includes a cold source, which is connected to the low temperature box and the test fixture through a pipeline, and the pipeline is provided with a switch valve, a safety valve, a first ball valve and a second ball valve; The switch valve and the safety valve are located on the main line, the first ball valve is located on the first branch line connected to the low temperature box, and the second ball valve is located on the second branch line connected to the test fixture.

7. The ultra-low temperature safety valve testing device according to claim 6, characterized in that: The cold source is liquid nitrogen.

8. The ultra-low temperature safety valve testing device according to claim 6, characterized in that: The test fixture is provided with an interlayer, which is connected to the cold source, and the cold source in the interlayer is used to maintain the temperature of the test fluid passing through the test fixture.

9. The ultra-low temperature safety valve testing device according to claim 1, characterized in that: The test fluid is helium.

10. The ultra-low temperature safety valve testing device according to claim 1, characterized in that: The height testing device measures the opening height of the safety valve being tested by infrared rays.

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