A constant pressure and constant flow circulating test system for a high-pressure vessel

Abstract

The utility model discloses a kind of constant-voltage constant-current circulation test systems of high pressure under container, including medium tank, high pressure generating mechanism, pressure reducing tank, liquid recovery mechanism and test piece container, medium tank, high pressure generating mechanism, test piece container, pressure reducing tank, liquid recovery mechanism are sequentially connected by pipeline;The high pressure environment required by system is provided by high pressure generating mechanism, combined with pressure regulating valve pressure supply condition adjustment simultaneously, and then real-time adjustment test pressure can be realized, it is convenient for the container test of various model specifications, simultaneously, keep the pressure required by pipeline by back pressure regulating valve under the state that pipeline or container pressure is not stable, adjust export pressure, ensure liquid flow can be normally output simultaneously, flow regulating valve can be according to mass flowmeter adjustment the flow required by test, real-time adjustment container flow;In addition, high pressure liquid is recycled to pressure reducing tank, and by the processing of liquid recovery mechanism, high pressure liquid is recycled to medium tank for recycling, realize system circulation.

Description

Technical Field

[0001] This utility model relates to the field of constant pressure and constant current testing technology, and in particular to a constant pressure and constant current cyclic testing system for a container under high hydraulic pressure. Background Technology

[0002] Currently, in production applications such as marine vessels, automobiles, chemicals, universities, laboratories, research institutions, and aerospace, a large number of containers are needed for research. However, due to the wide variety of container styles and models currently in use, researchers generally have limited understanding of the relevant properties of containers, which in turn affects experimental research.

[0003] To gain a better understanding of the relevant properties of containers (such as pressure resistance and flow rate), researchers used a static pressure testing system and a low-pressure constant-flow testing system to conduct pressure and flow rate tests on the containers. However, as the specifications, types, test pressures, and temperature and concentration of the test specimens vary, the operating conditions of the simulated test specimens also change continuously. However, the current static pressure testing system and low-pressure constant-flow testing system cannot achieve real-time adjustment, and test elements need to be constantly replaced under different test conditions, which seriously affects the test efficiency of the testing system.

[0004] Therefore, existing technologies still need to be improved and enhanced. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a constant pressure and constant flow cyclic test system for containers under high hydraulic pressure, which aims to solve the problem of the lack of testing equipment for containers under high hydraulic pressure that can adjust the pressure level, container flow rate and simulate the working conditions in real time.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A constant pressure and constant flow cyclic test system for a container under high hydraulic pressure includes a medium tank, a high pressure generating mechanism, a pressure reducing tank, a liquid recovery mechanism, and a test specimen container. The outlet end of the medium tank is connected to the high pressure generating mechanism via a pipeline, and the high pressure generating mechanism is connected to the inlet end of the test specimen container via a pipeline. A pressure regulating valve is also provided between the high pressure generating mechanism and the test specimen container. A test specimen pressure sensor is also provided on the test specimen container. The outlet end of the test specimen container is connected to the pressure reducing tank via a pipeline. A back pressure regulating valve and a flow regulating valve are also provided between the test specimen container and the pressure reducing tank. The pressure reducing tank is connected to the inlet end of the medium tank via the liquid recovery mechanism.

[0007] Furthermore, the high-pressure generating mechanism includes a booster pump and an accumulator. The accumulator is connected to the medium tank via a pipeline, and the pipeline between the accumulator and the medium tank is sequentially equipped with a booster pump, a power source check valve, a pressure gauge, and a high-pressure sensor.

[0008] Furthermore, a mass flow meter is installed on the pipeline between the high-pressure generating mechanism and the test specimen container, and a central pressure sensor is installed between the pressure regulating valve and the mass flow meter.

[0009] Furthermore, the inlet and outlet ends of the specimen container are respectively equipped with an inlet high-pressure needle valve and an outlet high-pressure needle valve, and an inlet pressure sensor is also installed on the pipeline at the inlet end of the specimen container.

[0010] Furthermore, a high-pressure filter is also installed between the back pressure regulating valves of the specimen container.

[0011] Furthermore, a pressure sensor is installed on the pressure reducing tank.

[0012] Furthermore, a gas processing module is connected to the top of the pressure reducing tank, and a switch valve and a check valve are installed between the pressure reducing tank and the gas processing module.

[0013] Furthermore, the liquid recovery mechanism includes a degassing module and a temperature control module. The degassing module is connected to the outlet of the pressure reducing tank via a pressure reducing valve, and the temperature control module is connected to the outlet of the degassing module and connected to the medium tank via a pipeline.

[0014] The technical solution adopted in this utility model has the following beneficial effects: In this application, a high-pressure generating mechanism is set up to provide the high-pressure environment required by the system. Simultaneously, a pressure regulating valve is used to adjust the pressure supply conditions, and a container pressure sensor is installed on the test specimen container. This allows for real-time adjustment of the test pressure, facilitating testing of various types and specifications of containers. Furthermore, a back pressure regulating valve and a flow regulating valve are installed on the liquid outlet pipeline of the test specimen container. The back pressure regulating valve maintains the required pressure in the pipeline or container when the pressure is unstable, regulates the outlet pressure, and ensures normal liquid flow output. The flow regulating valve adjusts the required flow rate according to the mass flow meter, achieving real-time adjustment of the container flow rate. In addition, the high-pressure liquid is recovered to a pressure reducing tank and then processed by a liquid recovery mechanism to be recycled to a media tank for reuse, achieving system circulation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the principle of the constant pressure and constant flow circulation control system for the container to withstand high hydraulic pressure according to this utility model; Figure 2 This is a schematic diagram of the high-pressure generating mechanism of this utility model; Figure 3 This is a schematic diagram of the back pressure generating mechanism and the flow regulating mechanism of this utility model; Figure 4 This is a schematic diagram of the test liquid recovery and recycling mechanism of this utility model; Figure 5This is a structural design model diagram of the present utility model.

[0016] Reference numerals: 1. Medium tank, 2. Filter, 3. Switch valve, 4. Booster pump, 5. Power source check valve, 6. Pressure gauge, 7. High-pressure sensor, 8. Accumulator, 9. Pressure regulating valve, 10. Intermediate pressure sensor, 11. Mass flow meter, 12. Inlet pressure sensor, 13. Inlet high-pressure needle valve, 14. Specimen container, 15. Outlet high-pressure needle valve, 16. High-pressure filter, 17. Back pressure regulating valve, 18. Flow regulating valve, 19. Pressure reducing tank, 20. Pressure reducing sensor, 21. Switch valve, 22. Check valve, 23. Gas processing module, 24. Pressure reducing valve, 25. Degassing module, 26. Temperature control module, 27. Specimen pressure sensor. Detailed Implementation

[0017] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0018] A constant pressure and constant flow cyclic testing system for a container under high hydraulic pressure, such as Figures 1-4 As shown, the system includes a medium tank 1, a high-pressure generating mechanism, a pressure reducing tank 19, a liquid recovery mechanism, and a test specimen container 14. The outlet of the medium tank 1 is connected to the high-pressure generating mechanism via a pipeline. The high-pressure generating mechanism is connected to the inlet of the test specimen container 14 via a pipeline. A pressure regulating valve 9 is also provided between the high-pressure generating mechanism and the test specimen container 14. A test specimen pressure sensor 27 is also provided on the test specimen container 14. The outlet of the test specimen container 14 is connected to the pressure reducing tank 19 via a pipeline. A back pressure regulating valve 17 and a flow regulating valve 18 are also provided between the test specimen container 14 and the pressure reducing tank 19. The pressure reducing tank 19 is connected to the inlet of the medium tank 1 via the liquid recovery mechanism.

[0019] In this embodiment, a high-pressure generating mechanism is provided to create the high-pressure environment required by the system. Simultaneously, a pressure regulating valve 9 is used to adjust the pressure supply conditions, and a container pressure sensor is installed on the test specimen container 14. This allows for real-time adjustment of the test pressure, facilitating testing of various container models and specifications. Furthermore, a back pressure regulating valve 17 and a flow regulating valve 18 are installed on the liquid outlet pipeline of the test specimen container 14. The back pressure regulating valve 17 maintains the required pressure in the pipeline or container when the pressure is unstable, regulates the outlet pressure, and ensures normal liquid flow output. The flow regulating valve 18 adjusts the required flow rate for the test, enabling real-time adjustment of the container flow rate. In addition, the high-pressure liquid is recovered into the pressure reducing tank 19 and, through the liquid recovery mechanism, is recycled back to the medium tank 1 for reuse, achieving system circulation.

[0020] In this embodiment, as Figure 1 and Figure 2 As shown, the high-pressure generating mechanism includes a booster pump 4 and an accumulator 8. The accumulator 8 is connected to the medium tank 1 via a pipeline. The pipeline between the accumulator 8 and the medium tank 1 is sequentially equipped with the booster pump 4, a power source check valve 5, a pressure gauge 6, and a high-pressure sensor 7. By increasing the pump, the medium delivered to the medium tank 1 is pressurized to provide a high-hydraulic test environment. The high-pressure liquid medium is stored in the accumulator 8 to prevent pipeline damage due to excessive pressure. At the same time, by setting the power source check valve 5, pressure gauge 6, and high-pressure sensor 7, the high-pressure liquid medium can be prevented from flowing back and damaging the medium tank 1. The pressure value in the pipeline can be monitored in real time, which is convenient for the test personnel to adjust according to the pressure value.

[0021] In this embodiment, a mass flow meter 11 is also installed on the pipeline between the high-pressure generating mechanism and the test specimen container 14. A central pressure sensor 10 is installed between the pressure regulating valve 9 and the mass flow meter 11. When the measured fluid is under conditions where parameters such as pressure and temperature vary greatly, if only the volumetric flow rate is measured, the change in fluid density will lead to a large measurement error. In volumetric and differential pressure flow meters, the density of the measured fluid may vary by 30%, which will cause a 30-40% error in the flow rate. However, by using the mass flow meter 11, the mass flow rate of the medium passing through the flow meter can be directly measured, and the flow information can be collected more accurately. It can be used in conjunction with the flow regulating valve 18 to achieve real-time flow control.

[0022] In this embodiment, as Figures 1-3 As shown, the inlet and outlet ends of the specimen container 14 are respectively equipped with an inlet high-pressure needle valve 13 and an outlet high-pressure needle valve 15, and an inlet pressure sensor 12 is also provided on the pipeline at the inlet end of the specimen container 14; the high-pressure needle valve can accurately control and cut off the flow of fluid under high pressure environment, effectively improve the accuracy of the test, and protect the specimen.

[0023] In this embodiment of the invention, a high-pressure filter 162 is also provided between the back pressure regulating valve 17 and the specimen container 14 to treat solid and liquid impurities in the high-pressure compressed air and ensure the safe operation of downstream equipment.

[0024] In this embodiment, as Figure 1 As shown, a pressure reducing sensor 20 is installed on the pressure reducing tank 19. Combined with the container pressure sensor, the middle pressure sensor 10 and the inlet pressure sensor 12 installed on the pipeline, and the high pressure sensor 7, multiple sensors are used together to realize the pressure value measurement of the test system and ensure the accuracy of the system pressure value.

[0025] Furthermore, in the embodiments of this utility model, all of the above valve bodies can be electronic valves, and the above multiple sensors can be connected to an external controller. The external controller sets a pressure threshold based on the pressure value of the sensors and controls the opening or closing of the electronic valve according to the pressure value to achieve automatic adjustment of the test pressure.

[0026] In this embodiment, as Figure 1 and Figure 3 As shown, a gas processing module 23 is also connected to the top of the pressure reducing tank 19, and a switch valve 213 and a check valve 22 are provided between the pressure reducing tank 19 and the gas processing module 23. The gas processing module 23 is a prior art technology, and the appropriate gas processing module 23 can be adopted according to the type and properties of the gas to realize gas recovery and avoid emission pollution of the environment. The check valve 22 can prevent gas backflow.

[0027] In this embodiment, as Figure 1 and Figure 4 As shown, the liquid recovery mechanism includes a degassing module 25 and a temperature control module 26. The degassing module 25 is connected to the outlet end of the pressure reducing tank 19 through a pressure reducing valve 24. The temperature control module 26 is connected to the outlet end of the degassing module 25 and is connected to the medium tank 1 through a pipeline.

[0028] The degassing module 25 is a device for recovering gaseous impurities mixed in the liquid. In this utility model, it is the prior art, and the ability to achieve this function shall prevail. The temperature control module 26 uses a heat exchanger to heat or cool the liquid, so that the liquid medium can be further recycled.

[0029] Specifically, the constant pressure and constant flow circulation control system of the container subjected to high hydraulic pressure utilizes a high pressure generating mechanism to generate high pressure medium input into the test specimen container 14. The liquid pressure is high, and the outlet, through the structure of the back pressure generating mechanism and the flow regulating mechanism, ensures that the medium maintains high pressure and a certain flow rate after flowing through the test specimen container 14. After the medium is depressurized and discharged after back pressure and flow regulation, the discharged high pressure medium is degassed by a degassing module and temperature controlled by a temperature control module before returning to the water tank 1. The medium in the open water tank is pressurized again after being mixed with the medium ratio.

[0030] The high-pressure generating mechanism uses a gas-liquid booster pump 4 to pressurize the medium from the medium tank. The booster pressure is adjustable and controllable via an electrical control system based on the pressure value fed back by the high-pressure sensor 7 on the outlet pipeline. The booster pump outlet is equipped with a check valve 4 and an accumulator 8 to ensure a continuous and stable increase in output pressure. The pressure of the booster source is adjusted in real time via a pressure regulating valve 9 based on the feedback value from the specimen pressure sensor 27 on the specimen container 14, and the flow rate is monitored by a mass flow meter 11 on the input liquid pipeline.

[0031] The test medium exiting the specimen container 14 flows into the back pressure valve after passing through the switching valve 15 and filter 16. The back pressure valve is continuously adjusted based on the pressure value fed back by the specimen pressure sensor 27 to ensure that the pressure inside the chamber remains constant after the high-pressure medium flows out of the container. The medium flowing out of the back pressure valve, after being depressurized, is regulated by the flow regulating valve 18 to obtain the desired flow rate. The back pressure valve 17 and the flow regulating valve 18 work together to achieve the ideal test pressure and flow rate. The relatively low-pressure liquid downstream of the flow regulating valve enters the pressure reducing tank. Some gas is released in the upper part of the pressure reducing tank and is discharged after treatment. The liquid outlet pipeline of the pressure reducing tank is depressurized again through the subsequent pressure reducing valve 24 to obtain a low-pressure medium for recycling.

[0032] Figure 5 The diagram shows a specific structural design model of this utility model. For a detailed implementation of the constant pressure and constant flow cyclic test system for a container subjected to high hydraulic pressure, please refer to the diagram. Figure 5 , Figure 5 The document provides specific locations and layouts for the accumulators, pumps, and pipelines.

[0033] The operating principle of the constant pressure and constant flow cyclic test system for containers subjected to high hydraulic pressure is as follows: At the start of the test, the medium tank 1 and the specimen container 14 are filled with the test liquid. The gas-liquid booster pump 4 is started to output high-pressure liquid. Based on the pressure value fed back by the outlet high-pressure sensor 7, the pressure boosting is adjusted in real time to reach the set pressure of the system pressure source. The regulating valve 9 is opened to allow the pressure in the specimen container 14 to continuously rise. When the pressure in the specimen container reaches the test pressure, the input pressure is stopped. The pressure in the specimen container 14 is stabilized by the linkage between the regulating valve 9 and the valve 27. The switch needle valve 15 and the back pressure valve 17 are opened to allow liquid medium to flow out of the specimen container. Due to the liquid outflow, the pressure in the specimen container 14 decreases. The pressure value fed back by the specimen pressure sensor 27 controls the pressure regulating valve 9 to perform system pressure boosting and pressure maintenance to maintain the pressure in the specimen container 14. Adjusting the flow regulating valve 18 and the back pressure valve 17 maintains the pressure in the specimen container 14 at 20 MPa, with a low output flow rate of 0.64 m³ / day. This interconnects the booster pump 4, pressure regulating valve 9, back pressure valve 17, and flow regulating valve 18, achieving a balance and thus constant pressure and flow control in the specimen container 14. The medium after flow regulation enters the pressure reducing tank 19, undergoes gas-liquid separation, and is further depressurized (24) to reach a low-pressure usable medium. After degassing (25) and temperature control (26), it returns to the initial medium tank 1, where it is re-mixed and recycled.

[0034] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the solutions disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the claims.

Claims

1. A constant pressure and constant flow cyclic test system for a container under high hydraulic pressure, characterized in that, The system includes a medium tank (1), a high-pressure generating mechanism, a pressure reducing tank (19), a liquid recovery mechanism, and a test specimen container (14). The outlet of the medium tank (1) is connected to the high-pressure generating mechanism via a pipeline. The high-pressure generating mechanism is connected to the inlet of the test specimen container (14) via a pipeline. A pressure regulating valve (9) is also provided between the high-pressure generating mechanism and the test specimen container (14). A test specimen pressure sensor (27) is also provided on the test specimen container (14). The outlet of the test specimen container (14) is connected to the pressure reducing tank (19) via a pipeline. A back pressure regulating valve (17) and a flow regulating valve (18) are also provided between the test specimen container (14) and the pressure reducing tank (19). The pressure reducing tank (19) is connected to the inlet of the medium tank (1) via the liquid recovery mechanism.

2. The constant pressure and constant flow cyclic test system for a container under high hydraulic pressure according to claim 1, characterized in that, The high pressure generating mechanism includes a booster pump (4) and an accumulator (8). The accumulator (8) is connected to the medium tank (1) through a pipeline. The booster pump (4), the power source check valve (5), the pressure gauge (6) and the high pressure sensor (7) are sequentially installed on the pipeline between the accumulator (8) and the medium tank (1).

3. The constant pressure and constant flow cyclic test system for a container under high hydraulic pressure according to claim 1, characterized in that, A mass flow meter (11) is also installed on the pipeline between the high pressure generating mechanism and the test specimen container (14), and a middle pressure sensor (10) is installed between the pressure regulating valve (9) and the mass flow meter (11).

4. The constant pressure and constant flow cyclic test system for a container under high hydraulic pressure according to claim 1, characterized in that, The inlet and outlet ends of the test specimen container (14) are respectively equipped with an inlet high pressure needle valve (13) and an outlet high pressure needle valve (15), and an inlet pressure sensor (12) is also provided on the pipeline at the inlet end of the test specimen container (14).

5. The constant pressure and constant flow cyclic test system for a container under high hydraulic pressure according to claim 1, characterized in that, A high-pressure filter (16) (2) is also provided between the back pressure regulating valve (17) of the specimen container (14).

6. The constant pressure and constant flow cyclic test system for a container under high hydraulic pressure according to claim 1, characterized in that, A pressure sensor (20) is installed on the pressure reducing tank (19).

7. The constant pressure and constant flow cyclic test system for a container under high hydraulic pressure according to claim 1, characterized in that, The top of the pressure reducing tank (19) is also connected to a gas processing module (23), and a switch valve (21) (3) and a check valve (22) are provided between the pressure reducing tank (19) and the gas processing module (23).

8. The constant pressure and constant flow cyclic test system for a container under high hydraulic pressure according to claim 1, characterized in that, The liquid recovery mechanism includes a degassing module (25) and a temperature control module (26). The degassing module (25) is connected to the outlet of the pressure reducing tank (19) through a pressure reducing valve (24). The temperature control module (26) is connected to the outlet of the degassing module (25) and is connected to the medium tank (1) through a pipeline.

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