Dual channel over flow shut-off cylinder valve

Abstract

The application discloses a double-channel overcurrent cut-off gas cylinder valve, which comprises a valve body, a pipeline connecting port on the side of the valve body, a gas cylinder connecting port on the bottom of the valve body, a valve installed in the valve body between the pipeline connecting port and the gas cylinder connecting port, two channels formed in the gas cylinder connecting port and communicated at the head and tail, an overcurrent cut-off device installed in one of the channels, and an on-off valve installed in the other channel.

Description

Technical Field

[0001] This invention relates to the field of cylinder valve technology, specifically to a cylinder valve that can automatically shut off the overflow of gas when a gas pipeline suffers abnormal damage, resulting in a large gas leak. Background Technology

[0002] Overcurrent shut-off cylinder valves are designed to address the problem of abnormally large gas leaks, enabling timely closure of the cylinder valve. For example, an overcurrent shut-off cylinder valve disclosed in publication number CN223152901U has a ball-type overcurrent shut-off valve installed in the pipe connection port on its side, which can promptly cut off large leaks of gas. However, because a pressure relief valve is installed on the side of the valve body for resetting the ball-type overcurrent shut-off valve and releasing pressure within the valve, gas is discharged from the valve during pressure relief, leading to air pollution, which is clearly undesirable for users. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an overcurrent shut-off gas cylinder valve that can prevent gas leakage from the valve during reset and depressurization.

[0004] The technical solution adopted to solve the above-mentioned technical problems is as follows: a dual-channel overcurrent cut-off gas cylinder valve, including a valve body, the valve body having a pipe connection port on the side and a gas cylinder connection port at the bottom, and a valve installed in the valve body between the pipe connection port and the gas cylinder connection port, characterized in that: two channels connected end to end are formed in the gas cylinder connection port, one channel is equipped with an overcurrent cut-off device, and the other channel is equipped with a switch valve.

[0005] Based on the above, the overcurrent shut-off device is a ball-type overcurrent shut-off valve.

[0006] Based on the above, the switching valve is a magnetically controlled switching valve.

[0007] The beneficial effects of this invention are as follows: The dual-channel overcurrent cut-off gas cylinder valve of this invention forms two interconnected channels at the gas cylinder connection port of the valve body. One channel is the gas consumption channel, which is equipped with an overcurrent cut-off device. The other channel is equipped with a switch valve for depressurizing both ends of the overcurrent cut-off device channel, so as to cause the overcurrent cut-off device to reset. The depressurized gas only flows inside the valve, thus effectively preventing gas leakage from the valve. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the dual-channel overcurrent shut-off gas cylinder valve of the present invention. Detailed Implementation

[0009] like Figure 1As shown, a dual-channel overcurrent shut-off gas cylinder valve includes a valve body 1, which has a side pipe connection port 1.1 and a bottom gas cylinder connection port 1.2. A valve 1.3 is installed inside the valve body between the pipe connection port 1.1 and the gas cylinder connection port 1.2. This valve 1.3 is a conventional valve that is switched on and off by a gas cylinder valve handwheel 4. In this invention, two interconnected channels are formed within the gas cylinder connection port 1.2. One channel 1.2.1 houses an overcurrent shut-off device 2, and the other channel 1.2.2 houses a switching valve 3.

[0010] The overcurrent shut-off device 2 can be a conventional ball-type overcurrent shut-off valve, or other known overcurrent shut-off devices. When a large amount of abnormal gas leaks, the excess gas flow pushes the ball upwards to close the valve port, cutting off the gas flow in channel 1.2.1. Then, turn handwheel 4 to close valve 1.3. Due to the pressure difference across the overcurrent shut-off valve in channel 1.2.1, the overcurrent shut-off device 2 remains closed. At this time, switch valve 3 can be opened, opening channel 1.2.2. The gas in the cylinder fills the upper section of channel 1.2.1 through channel 1.2.2, eliminating the pressure difference across the overcurrent shut-off device 2. The overcurrent shut-off device 2 opens and returns to its initial state. Finally, switch valve 3 is closed. The dual-channel overcurrent shut-off cylinder valve then returns to normal operation.

[0011] Specifically, the overcurrent cut-off device 2 in this embodiment mainly consists of a ball bearing 2.1, a spring 2.2, and a retaining ring 2.3. Correspondingly, the channel 1.2.1 should be a stepped channel that gradually narrows from bottom to top. The lower section houses the ball bearing 2.1, which can move up and down. The retaining ring 2.3 is installed at the bottom to prevent the ball bearing 2.1 from falling. The middle section houses the spring 2.2, which can move up and down, and also provides a valve port that can be closed by the ball bearing 2.1. The upper section provides a shoulder to abut against the spring 2.2. The spring 2.2 provides assistance for the ball bearing's reset, preventing jamming when the ball bearing 2.1 is closed. Of course, a conventional channel allowing gas flow not exceeding a set threshold should be provided between the ball bearing 2.1, the channel 1.2.1, and the retaining ring 2.3.

[0012] The switching valve 3 in channel 1.2.2 is a conventional component, which can be a manually operated or electrically controlled switching valve. This embodiment uses a magnetically controlled switching valve, mainly composed of a magnetically controlled valve core 3.1, a spring 3.2, and a cap 3.3. The magnetically controlled valve core 3.1 moves laterally back and forth within channel 1.2.2, cutting off channel 1.2.2. The spring 3.2 presses against the magnetically controlled valve core 3.1 to maintain a closed state. The cap 3.3 fits over the spring 3.3 and seals the valve body mounting hole of the switching valve. The magnetically controlled valve core 3.1 can be opened by magnetic force, overcoming the elastic force of the spring 3.3. Magnetic control facilitates standardized management within the industry.

Claims

1. A dual-channel overcurrent shut-off gas cylinder valve, comprising a valve body having a side pipe connection port and a bottom gas cylinder connection port, wherein a valve is installed inside the valve body between the pipe connection port and the gas cylinder connection port, characterized in that: The gas cylinder connection port forms two interconnected channels, one of which is equipped with an overcurrent cut-off device, and the other is equipped with a switch valve.

2. The dual-channel overcurrent shut-off gas cylinder valve according to claim 1, characterized in that: The overcurrent shut-off device is a ball-type overcurrent shut-off valve.

3. The dual-channel overcurrent shut-off gas cylinder valve according to claim 1 or 2, characterized in that: The switching valve is a magnetically controlled switching valve.

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