CN-122014995-A - Gas supply system

Abstract

The gas supply system includes a gas tank having an automatic shutoff valve, a gas supply pipe connecting the gas tank and a gas consuming apparatus, a seal, and a check valve provided in the gas supply pipe. A push rod is arranged at the front end of the air supply pipe, and when the air tank approaches, the push rod pushes the automatic closing valve open. The seal seals a connection space including the self-closing valve and a front end of the gas supply pipe when a distance between the self-closing valve and the push rod is less than or equal to a threshold distance. The controller advances the gas tank until the automatic closing valve is pushed open, and then retreats the gas tank to a position where the automatic closing valve is closed while maintaining the seal of the connection space. When the pressure in the gas supply pipe upstream of the check valve is lower than the downstream pressure, the controller determines that gas leakage has occurred.

Inventors

• Fujimura Kako
• Naoko Dengmei
• Dianzheng Tetsuya

Assignees

• 丰田自动车株式会社

Dates

Publication Date

20260512

Application Date

20251106

Priority Date

20241112

Claims (2)

1. 1. A gas supply system is characterized by comprising: A gas canister having an automatic shut-off valve that opens when a push rod is pushed in and closes when the push rod is pulled out; A gas supply pipe connected to the gas tank, the gas supply pipe being provided with the push rod at a front end thereof and guiding gas from the gas tank to a gas utilization device; an actuator that advances and retreats the gas tank with respect to the gas supply pipe; A seal member that seals a connection space including an opening of the automatic shut-off valve and a front end of the gas supply pipe when a distance between the automatic shut-off valve and the push rod is less than a prescribed threshold distance; A check valve provided in the gas supply pipe and preventing reverse flow of gas; A1 st pressure sensor that measures the pressure within the gas supply pipe upstream of the check valve; a2 nd pressure sensor measuring the pressure in the gas supply pipe downstream of the check valve, and The controller is used for controlling the operation of the controller, The controller performs the following processing: Controlling the actuator to advance the gas tank until pushing open the automatic closing valve, and then retracting the gas tank to a position where the automatic closing valve is closed while maintaining the seal of the connection space, and After a predetermined time, when the measurement value of the 1 st pressure sensor is equal to or greater than the measurement value of the 2 nd pressure sensor, the gas tank is again advanced to open the automatic shutoff valve, and when the measurement value of the 1 st pressure sensor is smaller than the measurement value of the 2 nd pressure sensor, a signal indicating that gas leakage has occurred is output.
2. 2. A gas supply system according to claim 1, wherein, The gas supply pipe is divided into a plurality of branched circuits, The 1 st pressure sensor, the check valve and the push rod are arranged on each branch circuit, The gas tank is connected to each of the branched circuits.

Description

Gas supply system Technical Field The technology disclosed in the present specification relates to a gas supply system that supplies gas in a gas tank to a gas consuming apparatus. Background In japanese patent application laid-open No. 2024-89965, a gas supply system is disclosed that is provided with a plurality of gas tanks, and supplies gas from the gas tanks to a gas-consuming apparatus. In the gas supply system of japanese patent application laid-open No. 2024-89965, if the gas remaining amount in all the gas tanks becomes small, a gas leakage check is performed before the gas tanks are replaced. If the remaining amount of all the gas tanks becomes smaller, the controller of the system closes the on-off valves of all the gas tanks, consumes the gas in the gas supply pipe, and then stops the gas consuming equipment. The controller then removes the gas canister from the system after confirming that the gas pressure in the gas supply tube is not rising. When the gas pressure in the gas supply pipe increases, gas leakage occurs from the opening/closing valve. In this case, when the gas tank is removed from the system, the gas in the gas tank leaks to the surroundings. In the case where the gas pressure in the gas supply pipe rises, the controller stops the detachment of the gas tank. Disclosure of Invention In the gas supply system of japanese patent application laid-open No. 2024-89965, the presence or absence of gas leakage is detected based on whether or not the gas pressure in the gas supply pipe rises. Therefore, in order to perform the gas leakage check, it is necessary to temporarily stop the supply of gas to the gas consuming apparatus. The present specification provides a technique capable of performing gas leakage inspection without interrupting the supply of gas to a gas consuming apparatus. The gas supply system disclosed in the present specification comprises a gas tank, a gas supply pipe, an actuator, a seal, a check valve, a 1 st pressure sensor and a 2 nd pressure sensor, and a controller. The gas canister has an auto-shut valve that opens when the push rod is pushed in and closes when the push rod is pulled out. The gas supply pipe is connected with a gas tank. The gas supply pipe is provided with a push rod at the front end to guide the gas of the gas tank to the gas utilization device. An actuator advances and retreats the gas canister relative to the gas supply tube. The seal seals a connection space including an opening of the self-closing valve and a front end of the gas supply pipe when a distance between the self-closing valve and the push rod is less than a prescribed threshold distance. A check valve is disposed within the gas supply tube and prevents reverse flow of gas. The 1 st pressure sensor measures the pressure in the gas supply pipe upstream of the check valve. The 2 nd pressure sensor measures the pressure in the gas supply pipe downstream of the check valve. The controller controls the actuator to advance the gas tank until the automatic closing valve is pushed open, and then to retreat the gas tank to a position where the automatic closing valve is closed while maintaining the seal of the connection space. After a predetermined time, the controller again advances the gas tank to open the automatic shutoff valve when the measurement value of the 1 st pressure sensor is equal to or greater than the measurement value of the 2 nd pressure sensor, and outputs a signal indicating that gas leakage has occurred when the measurement value of the 1 st pressure sensor is smaller than the measurement value of the 2 nd pressure sensor. When the automatic shutoff valve of the gas tank is opened, gas supply to the gas consuming apparatus is started. In the gas supply system disclosed in the present specification, gas leakage inspection is performed on the upstream side of the check valve in a state where the gas supply pipe downstream of the check valve is filled with gas. During the period in which the gas tank is retracted to close the automatic shutoff valve and gas leakage inspection is performed, the high-pressure gas accumulated in the gas supply pipe downstream of the check valve is continuously supplied to the gas consuming apparatus. The gas supply system disclosed in the present specification can perform gas leakage inspection without interrupting the supply of gas to the gas consuming apparatus. In the gas supply system disclosed in the present specification, the gas supply pipe may be divided into a plurality of branch lines, and the 1 st pressure sensor, the check valve, and the push rod are provided on each branch line. Each branch is connected with a gas tank. An actuator can move the gas canister relative to the push rod on each of the branches. The other gas tank can be replaced during the supply of gas from the one gas tank to the gas consumer. The details and further improvements of the technology disclosed in this specification will be described in the following "