Low temperature liquid handling hose pressure test system

Abstract

The utility model belongs to hose test testing technical field discloses a kind of low-temperature liquid loading and unloading hose pressure test system, including water tank, pressurizing pump, test hose and PLC control system;The water outlet of water tank is communicated with the water inlet of pressurizing pump by pipeline, the water outlet of pressurizing pump is communicated with one end of water outlet pipeline, the other end of water outlet pipeline is communicated with the water inlet of test hose by liquid inlet pipeline, the other end of water outlet pipeline is also communicated with the water inlet of water tank by drain pipeline, the water outlet of test hose is communicated with drain pipeline;The water inlet one end of water outlet pipeline is equipped with electric valve, first pressure gauge and remote pressure gauge are installed on water outlet pipeline, pressure relief valve is installed on drain pipeline;Manual drain valve is installed on drain pipeline.The utility model is suitable for hose used in low-temperature liquid loading and unloading process to carry out pressure test, can find hose not in line with use requirement, ageing and other problems in time, ensure hose safe use.

Description

Technical Field

[0001] This utility model belongs to the field of hose testing technology, and relates to a pressure resistance testing system for cryogenic liquid loading and unloading hoses. Background Technology

[0002] Cryogenic tank trucks are specialized vehicles used for transporting cryogenic liquids and have a wide range of applications. Currently, loading and unloading cryogenic tank trucks all require the use of hoses. During the loading and unloading of cryogenic liquids using hoses, there are certain requirements for the working pressure of the hoses. If the working pressure cannot meet the requirements, the hoses may rupture and leak during the loading and unloading process, causing frostbite to the operators. Therefore, it is necessary to regularly inspect the hoses used for loading and unloading. Thus, it is essential to design a stable and reliable pressure testing system for the hoses used in loading and unloading cryogenic tank trucks to promptly identify problems such as hoses that do not meet usage requirements or aging. Utility Model Content

[0003] The purpose of this invention is to provide a pressure resistance testing system for cryogenic liquid loading and unloading hoses, so as to conduct pressure resistance tests on hoses used in the process of loading and unloading cryogenic liquids, improve the reliability and convenience of the test, and provide a guarantee for subsequent loading and unloading of cryogenic liquid tank trucks.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A low-temperature liquid loading and unloading hose pressure resistance test system includes a water tank, a pressurizing pump, a test hose, and a PLC control system; The outlet of the water tank is connected to the inlet of the booster pump via a pipeline. The outlet of the booster pump is connected to one end of the outlet pipeline. The other end of the outlet pipeline is connected to the inlet of the test hose via an inlet pipeline. The other end of the outlet pipeline is also connected to the inlet of the water tank via a drain pipeline. The outlet of the test hose is connected to the drain pipeline. An electric valve is installed at one end of the water inlet of the water outlet pipeline, a first pressure gauge and a remote pressure gauge are installed on the water outlet pipeline, a pressure relief valve is installed on the drain pipeline, and a manual drain valve is installed on the drain pipeline. The pressurization pump, electric valve, remote pressure gauge, and pressure relief valve are all electrically connected to the PLC control system.

[0005] As a limitation, the test tube is fitted inside a protective sleeve.

[0006] As a second limitation, a first manual valve is also installed at the inlet end of the water outlet pipe.

[0007] As a further limitation, a safety valve is installed at one end of the water outlet of the water outlet pipeline, and the safety valve is electrically connected to the PLC control system.

[0008] As a further limitation, a temperature transmitter is also installed on the water outlet pipe, and the temperature transmitter is electrically connected to the PLC control system.

[0009] As a further limitation, a second pressure gauge is also installed on the water outlet pipe, and the second pressure gauge is electrically connected to the PLC control system.

[0010] As a third limitation, the outlet of the booster pump is connected to one end of the outlet pipeline via a one-way valve, and the one-way valve is electrically connected to the PLC control system.

[0011] As a fourth limitation, a second manual valve is connected to the pipeline connecting the outlet of the water tank and the inlet of the booster pump.

[0012] As a fifth limitation, it also includes a printer, which is electrically connected to the PLC control system.

[0013] The technological advancements achieved by this invention compared to existing technologies, due to the adoption of the aforementioned technical solution, are as follows: (1) This utility model includes a water tank, a pressurizing pump, a test hose and a PLC control system. The outlet of the water tank is connected to the inlet of the pressurizing pump through a pipeline. The outlet of the pressurizing pump is connected to one end of the outlet pipeline. The other end of the outlet pipeline is connected to the inlet of the test hose through an inlet pipeline. The other end of the outlet pipeline is also connected to the inlet of the water tank through a drain pipeline. The outlet of the test hose is connected to the drain pipeline. An electric valve is installed at one end of the inlet of the outlet pipeline. A first pressure gauge and a remote pressure gauge are installed on the outlet pipeline. A pressure relief valve is installed on the drain pipeline. A manual drain valve is installed on the drain pipeline. The PLC control system integrates and controls the electric valve, the remote pressure gauge and the pressure relief valve, realizing the automatic adjustment of system pressure and flow rate, avoiding the instability of manual pressure adjustment, and significantly improving the test accuracy and efficiency. (2) In this utility model, the test hose is sleeved inside the protective sleeve, which avoids the test hose from rupturing during the pressurization process, resulting in water mist injury; (3) A safety valve is installed at one end of the outlet of the water pipe. The dual pressure relief design of the pressure relief valve and the safety valve reduces the risk of sudden high pressure accidents. (4) A temperature transmitter is also installed on the water outlet pipe of this utility model. The water temperature in the system can be monitored in real time through the temperature transmitter, and the performance of the hose can be tested in the corresponding low temperature environment. (5) In this utility model, the outlet of the pressurizing pump is connected to one end of the outlet pipeline through a one-way valve. By setting the one-way valve, the backflow of high-pressure water can be avoided, which may damage the equipment.

[0014] In summary, this utility model is applicable to pressure testing of hoses used in the loading and unloading of cryogenic liquids, and can promptly detect problems such as hoses not meeting usage requirements or aging, ensuring the safe use of hoses. Attached Figure Description

[0015] Figure 1 The diagram shown is a structural schematic of an embodiment of this utility model.

[0016] In the diagram: 1. Water tank; 2. Pressure pump; 3. Test hose; 4. Protective sleeve; 5. Water outlet pipe; 6. Liquid inlet pipe; 7. Drain pipe; 8. Drain pipe; 9. First manual valve; 10. Electric valve; 11. First pressure gauge; 12. Second pressure gauge; 13. Remote pressure gauge; 14. Temperature transmitter; 15. Safety valve; 16. Pressure relief valve; 17. Manual drain valve; 18. Second manual valve; 19. Check valve. Detailed Implementation

[0017] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Example: A pressure resistance testing system for cryogenic liquid loading and unloading hoses like Figure 1 As shown, this embodiment is a low-temperature liquid loading and unloading hose pressure resistance test system, including a water tank 1, a pressurizing pump 2, a test hose 3 and a PLC control system. The test hose 3 is sleeved in a protective sleeve 4, and the protective sleeve 4 has openings at both ends for the pipeline to enter and exit.

[0019] The outlet of water tank 1 is connected to the inlet of booster pump 2 through a pipeline. The outlet of booster pump 2 is connected to one end of outlet pipeline 5. The other end of outlet pipeline 5 is connected to the inlet of test hose 3 through inlet pipeline 6. The other end of outlet pipeline 5 is also connected to the inlet of water tank 1 through drain pipeline 7. The outlet of test hose 3 is connected to drain pipeline 8.

[0020] The outlet pipe 5 is equipped with a first manual valve 9 and an electric valve 10 at one end of its inlet. The outlet pipe 5 is also equipped with a first pressure gauge 11, a second pressure gauge 12, a remote pressure gauge 13, and a temperature transmitter 14. A safety valve 15 is installed at one end of the outlet pipe 5. A pressure relief valve 16 is installed on the drain pipe 7. A manual drain valve 17 is installed on the drain pipe 8. A second manual valve 18 is connected to the pipe connecting the outlet of the water tank 1 and the inlet of the booster pump 2. The outlet of the booster pump 2 is connected to one end of the outlet pipe 5 via a check valve 19.

[0021] The booster pump 2, electric valve 10, remote pressure gauge 13, temperature transmitter 14, safety valve 15, check valve 19 and pressure relief valve 16 are electrically connected to the PLC control system.

[0022] This embodiment also includes a printer, which is electrically connected to the PLC control system. By configuring the printer, the PLC control system can generate a data table from the data during the test, which can then be printed out and archived by the printer.

[0023] The usage process in this embodiment is as follows: The test hose 3 is placed inside the protective sleeve 4 and connected to the cryogenic liquid loading and unloading hose pressure resistance test system. Cryogenic water at the required temperature is placed in the water tank 1. The first manual valve 9, the second manual valve 18, and the manual drain valve 17 are opened, and then the PLC control system is started. The pressurization pump 2, the check valve 19, and the electric valve 10 are opened through the PLC control system, and the pressure relief valve 16 is closed. The pressure at the outlet of the pressurization pump 2 is about 10 MPa. When the outlet of the manual drain valve 17 is completely filled with water and there is no gas, it means that the test hose 3 is full of water. At this time, the manual drain valve 17 is closed.

[0024] Observe whether the pressures of the first pressure gauge 11, the second pressure gauge 12, and the remote pressure gauge 13 are consistent. If they are inconsistent, troubleshooting is required until they are consistent.

[0025] Observe the first pressure gauge 11, the second pressure gauge 12, and the remote pressure gauge 13. When the pressure rises to the working pressure of the test hose 3, the PLC control system shuts down the pressurizing pump 2, the one-way valve 19, and the electric valve 10 to maintain system pressure. If the pressure change rate meets the requirements within the specified time, the PLC control system continues to open the pressurizing pump 2, the one-way valve 19, and the electric valve 10 to pressurize the test hose 3 to 1.5 times the working pressure. After reaching the set pressure, the PLC control system shuts down the pressurizing pump 2, the one-way valve 19, and the electric valve 10 to maintain system pressure. If the pressure change rate meets the requirements within the specified time, a pressure relief operation is performed. The PLC control system opens the pressure relief valve 16 to release the pressure in the system to the working pressure of the test hose 3. When the system pressure reaches the working pressure, the PLC control system closes the pressure relief valve 16 to maintain the system pressure at the working pressure. If the pressure change rate meets the requirements within the specified time, the PLC control system opens the pressure relief valve 16 to slowly release the system pressure to zero.

[0026] The PLC control system statistically analyzes the data during the test, including the water temperature sent by the temperature transmitter 14, and then generates a data table, which is printed out by the printer, signed and stamped by the test personnel, and archived.

[0027] It should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure resistance testing system for cryogenic liquid loading and unloading hoses, characterized in that, Includes a water tank, a booster pump, a test hose, and a PLC control system; The outlet of the water tank is connected to the inlet of the booster pump via a pipeline. The outlet of the booster pump is connected to one end of the outlet pipeline. The other end of the outlet pipeline is connected to the inlet of the test hose via an inlet pipeline. The other end of the outlet pipeline is also connected to the inlet of the water tank via a drain pipeline. The outlet of the test hose is connected to the drain pipeline. An electric valve is installed at one end of the water inlet of the water outlet pipeline, a first pressure gauge and a remote pressure gauge are installed on the water outlet pipeline, a pressure relief valve is installed on the drain pipeline, and a manual drain valve is installed on the drain pipeline. The pressurization pump, electric valve, remote pressure gauge, and pressure relief valve are all electrically connected to the PLC control system.

2. The cryogenic liquid loading and unloading hose pressure resistance testing system according to claim 1, characterized in that, The test hose is fitted inside a protective sleeve.

3. The cryogenic liquid loading and unloading hose pressure resistance testing system according to claim 1 or 2, characterized in that, A first manual valve is also installed at the inlet end of the water outlet pipe.

4. The cryogenic liquid loading and unloading hose pressure resistance testing system according to claim 3, characterized in that, A safety valve is installed at one end of the water outlet of the water outlet pipeline, and the safety valve is electrically connected to the PLC control system.

5. The cryogenic liquid loading and unloading hose pressure resistance testing system according to claim 4, characterized in that, A temperature transmitter is also installed on the water outlet pipe, and the temperature transmitter is electrically connected to the PLC control system.

6. The cryogenic liquid loading and unloading hose pressure resistance testing system according to claim 5, characterized in that, A second pressure gauge is also installed on the water outlet pipe, and the second pressure gauge is electrically connected to the PLC control system.

7. The cryogenic liquid loading and unloading hose pressure resistance testing system according to claim 1, characterized in that, The outlet of the booster pump is connected to one end of the outlet pipeline via a check valve, and the check valve is electrically connected to the PLC control system.

8. The cryogenic liquid loading and unloading hose pressure resistance testing system according to claim 1, characterized in that, A second manual valve is connected to the pipeline connecting the outlet of the water tank and the inlet of the booster pump.

9. The cryogenic liquid loading and unloading hose pressure resistance testing system according to claim 1, characterized in that, It also includes a printer, which is electrically connected to the PLC control system.

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