CN-122015362-A - System and method for judging gas leakage fault

CN122015362ACN 122015362 ACN122015362 ACN 122015362ACN-122015362-A

Abstract

The invention discloses a system and a method for judging a gas-crossing fault, wherein the system comprises a power supply for supplying power to a compressor, the compressor for generating high-pressure gas and recycling low-pressure gas, a motor for driving the refrigerator to operate, a high-pressure gas pipeline for supplying the high-pressure gas generated by the compressor to a refrigerator A and a device B to be detected, a low-pressure gas pipeline for returning the gas expanded by the refrigerator A and the device B to be detected to the compressor, a valve for closing or opening a high-pressure gas loop and a low-pressure gas loop of the device B to be detected, the refrigerator A comprises a rotary valve and a gas distributing valve, a temperature sensor for collecting the temperature of the refrigerator A, and a data collector for collecting temperature data collected by the temperature sensor and judging whether the device B to be detected has the gas-crossing fault by monitoring the temperature change of the refrigerator A. The system for judging the gas-crossing faults is simple, and the method is efficient and easy to implement.

Inventors

Zhou Zhipo
TAO JIE
HE HANJUN
Qu Fangjie
LI AO

Assignees

中船鹏力(南京)超低温技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260205

Claims (7)

1. A system for judging the gas leakage fault is characterized by comprising a power supply, a compressor, a motor, a high-pressure gas pipeline, a low-pressure gas pipeline, a valve, a data acquisition instrument, a temperature sensor, a refrigerator A and at least one device B to be detected, wherein the device B to be detected needs to detect whether the gas leakage fault exists or not, The power supply is used for supplying power to the compressor; The compressor is used for generating high-pressure gas and recovering low-pressure gas; the motor is used for driving the refrigerator A to operate; The high-pressure gas pipeline is used for supplying high-pressure gas generated by the compressor to the refrigerator A and the equipment to be detected B, and the low-pressure gas pipeline is used for returning the gas expanded by the refrigerator A and the equipment to be detected B to the compressor; the valve is used for closing or opening a high-pressure gas loop and a low-pressure gas loop of the equipment B to be detected; The refrigerating machine A comprises a rotary valve, an air distributing valve and a heat regenerator, wherein the air distributing valve is tightly attached to the rotary valve, high-pressure gas firstly enters the heat regenerator from a high-pressure gas pipeline and then expands from the heat regenerator to a low-pressure gas pipeline, so that a refrigerating cycle is completed; The temperature sensor is used for collecting the temperature of the refrigerator A, the data collector is used for collecting temperature data collected by the temperature sensor, and whether the equipment B to be detected has a gas cross fault or not is judged by monitoring the temperature change of the refrigerator A.
2. The system according to claim 1, wherein the temperature sensor includes a primary temperature sensor and a secondary temperature sensor for acquiring temperatures of the primary and secondary stages of the refrigerator a, respectively.
3. The system for judging the cross gas faults according to claim 1, wherein the to-be-detected device B is one to be detected, the high-pressure gas pipeline comprises a high-pressure air inlet main pipeline, a high-pressure air inlet A pipeline and a high-pressure air inlet B pipeline, the low-pressure gas pipeline comprises a low-pressure air return main pipeline, a low-pressure air return A pipeline and a low-pressure air return B pipeline, the high-pressure air inlet A pipeline and the high-pressure air inlet B pipeline are connected to the high-pressure air inlet main pipeline in parallel, and the low-pressure air return A pipeline and the low-pressure air return B pipeline are connected to the low-pressure air return main pipeline in parallel.
4. The system of claim 3, wherein the valves include a high pressure valve disposed at the high pressure intake path B and a low pressure valve disposed at the low pressure return path B.
5. The system according to claim 1, wherein the device B to be detected is a G-M refrigerator, a G-M pulse tube refrigerator, or other devices that may have a cross-gas fault.
6. A method for determining a cross gas failure using the system according to any one of claims 1 to 5, comprising the steps of: S1, closing a valve, and starting a refrigerator A; s2, after the temperature of the refrigerator A is stable, accessing the equipment B to be detected, and opening a valve; s3, judging whether the temperature of the refrigerator A fluctuates, if so, judging that the equipment B to be detected has a gas leakage fault; S4, if not, the equipment B to be detected has no cross gas fault; S5, closing the valve, and moving out the equipment B to be detected.
7. The method of claim 6, wherein the step S1 is a first operation start point, the step S2 is a normal operation start point, the refrigerator a is kept in normal operation in the step S2, and the fast determination of whether the equipment B has the air-leakage fault can be achieved only by connecting the equipment B to be detected to the air-leakage fault determination system.

Description

System and method for judging gas leakage fault Technical Field The invention belongs to the technical field of low temperature, and relates to a system and a method for judging a gas leakage fault. Background The equipment has the problems of strong concealment, complex positioning diagnosis, multiple interference factors and the like, so that the equipment is difficult to detect. Taking a G-M refrigerator as an example, the G-M refrigerator is used as one of the valve-type refrigerators, and the switching of high-pressure gas loops and low-pressure gas loops is controlled by a valve to realize a continuous Simon expansion refrigeration process, wherein a regenerator in the refrigerator can gradually accumulate cold energy in continuous Simon expansion, and then the cold energy generated by the heat regenerator is output to a cooled object through a cold end heat exchanger. The safety and stability of the G-M refrigerator in use have been proved in practice, but in the process of assembling the G-M refrigerator, the problem of low yield of once processing and the need of reworking still exists. In the face of the G-M refrigerator needing to be reworked, the reason of the fault is judged first, and then the fault can be removed in a targeted manner, so that the production efficiency is improved. However, the G-M refrigerator has a complex structure, and the problem of easy failure is also very numerous, for example, the rotary valve and the distributing valve are not tightly matched, so that the G-M refrigerator generates a gas cross phenomenon, that is, part of high-pressure gas does not flow to the low-pressure pipeline loop directly without passing through the regenerator and the cylinder, and does not participate in the expansion refrigeration process. Disclosure of Invention The invention aims to rapidly judge whether the fault equipment is a gas-leakage fault or not, and provides a gas-leakage fault judging system and a gas-leakage fault judging method. The technical scheme is that the system for judging the gas leakage fault comprises a power supply, a compressor, a motor, a high-pressure gas pipeline, a low-pressure gas pipeline, a valve, a data acquisition instrument, a temperature sensor, a refrigerator A and at least one device B to be detected, wherein the device B to be detected needs to detect whether the gas leakage fault exists or not, The power supply is used for supplying power to the compressor; The compressor is used for generating high-pressure gas and recovering low-pressure gas; the motor is used for driving the refrigerator A to operate; The high-pressure gas pipeline is used for supplying high-pressure gas generated by the compressor to the refrigerator A and the equipment to be detected B, and the low-pressure gas pipeline is used for returning the gas expanded by the refrigerator A and the equipment to be detected B to the compressor; the valve is used for closing or opening a high-pressure gas loop and a low-pressure gas loop of the equipment B to be detected; The refrigerating machine A comprises a rotary valve, an air distributing valve and a heat regenerator, wherein the air distributing valve is tightly attached to the rotary valve, high-pressure gas firstly enters the heat regenerator from a high-pressure gas pipeline and then expands from the heat regenerator to a low-pressure gas pipeline, so that a refrigerating cycle is completed; The temperature sensor is used for collecting the temperature of the refrigerator A, the data collector is used for collecting temperature data collected by the temperature sensor, and whether the equipment B to be detected has a gas cross fault or not is judged by monitoring the temperature change of the refrigerator A. Further, the temperature sensor comprises a primary temperature sensor and a secondary temperature sensor, and the primary temperature sensor and the secondary temperature sensor are respectively used for acquiring the temperatures of the primary stage and the secondary stage of the refrigerator A. Further, the to-be-detected device B is one high-pressure gas pipeline comprising a high-pressure air inlet main pipeline, a high-pressure air inlet A pipeline and a high-pressure air inlet B pipeline, the low-pressure gas pipeline comprises a low-pressure air return main pipeline, a low-pressure air return A pipeline and a low-pressure air return B pipeline, the high-pressure air inlet A pipeline and the high-pressure air inlet B pipeline are connected in parallel to the high-pressure air inlet main pipeline, and the low-pressure air return A pipeline and the low-pressure air return B pipeline are connected in parallel to the low-pressure air return main pipeline. Further, the valve comprises a high-pressure valve and a low-pressure valve, the high-pressure valve is arranged at the high-pressure air inlet B path, and the low-pressure valve is arranged at the low-pressure air return B path. Further, the device B to be detected is a G