Overcurrent cut-off cylinder valve

Abstract

The application discloses a kind of overcurrent cut-off gas cylinder valves, including valve body, valve body has the pipeline connecting port of side part and the gas cylinder connecting port of bottom, valve is installed between the valve body of pipeline connecting port and gas cylinder connecting port, the gas cylinder connecting port is installed with pipe seat, pipe seat has with gas passage and leakage passage, wherein the top of leakage passage is placed cut-off ball, the lower end of the valve hole of valve is set to cooperate the valve port blocked by cut-off ball, the side wall of valve body is installed with the pusher device of cut-off ball that push away from valve port laterally reciprocating, pusher device is installed with reset spring.The application only needs to push pusher device inward when resetting gas cylinder valve, cut-off ball is pushed away from valve port, cut-off ball naturally falls to the mouth of leakage passage, and gas cylinder valve restores normal use state.The application does not need to discharge pressure gas when resetting overcurrent cut-off gas cylinder valve, and can effectively prevent gas from leaking in valve.

Description

Technical Field

[0001] This invention relates to the field of gas cylinder valve technology, specifically to a gas cylinder valve that can automatically shut off the overflow cut-off when a gas pipeline suffers abnormal damage and a large amount of gas leaks. 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 when resetting the gas cylinder valve.

[0004] The technical solution adopted to solve the above-mentioned technical problems is as follows: an overcurrent shut-off gas cylinder valve, comprising a valve body, the valve body having a pipe connection port on the side and a gas cylinder connection port at the bottom, a valve being installed in the valve body between the pipe connection port and the gas cylinder connection port, characterized in that: a pipe seat is installed in the gas cylinder connection port, the pipe seat having a gas supply channel and a discharge channel, wherein a shut-off ball is placed at the top of the discharge channel, the lower end of the valve orifice of the valve is configured as a valve port to be sealed in conjunction with the shut-off ball, and a pusher device that moves laterally and reciprocates to push the shut-off ball away from the valve port is installed on the side wall of the valve body, the pusher device being equipped with a return spring.

[0005] Based on the above, the pushing device includes a sliding seal mounted on the side wall of the valve body, the pushing part forming a push rod for pushing and cutting the ball, and a return spring mounted between the pushing part and the valve body to maintain the pushing device's tendency to slide outward.

[0006] Based on the above, the central channel of the pipe seat is a venting channel, the outer wall is formed with a groove as a gas passage, and the side wall of the pipe seat is formed with a through hole connecting the central channel and the groove.

[0007] The beneficial effects of this invention are as follows: The overcurrent shut-off gas cylinder valve cleverly divides the gas passage within the valve body into a gas consumption passage and a venting passage via a pipe seat. The gas consumption passage provides a flow rate that does not exceed the gas consumption threshold under normal gas usage conditions. The venting passage is for gas exceeding the gas consumption flow rate in abnormal situations such as large gas leaks. The shut-off ball placed at the outlet of the venting passage is pushed towards the valve orifice by the venting gas, sealing the valve opening and cutting off the gas flow. To reset the gas cylinder valve, simply push the pusher inward to push the shut-off ball away from the valve orifice. The shut-off ball will naturally fall onto the venting passage opening, and the gas cylinder valve will return to normal operation. This invention's overcurrent shut-off gas cylinder valve does not require external venting of depressurized gas during reset, effectively preventing gas leakage from the valve. Attached Figure Description

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

[0009] like Figure 1 As shown, an overcurrent shut-off gas cylinder valve includes a valve body 1 with a side pipe connection port 1.1 and a bottom gas cylinder connection port 1.2. A valve 2 is installed inside the valve body 1 between the pipe connection port 1.1 and the gas cylinder connection port 1.2. The valve 2 is a conventional valve that is switched on and off by a gas cylinder valve handwheel 3. In this invention, a pipe seat 4 is installed inside the gas cylinder connection port 1.2. The pipe seat 4 has a gas supply channel 4.1 and a discharge channel 4.2. A shut-off ball 5 is placed at the top of the discharge channel 4.2. The lower end of the valve hole 2.1 of the valve 2 is configured as a valve port 2.1.1 to be sealed by the shut-off ball 5. A pusher device 6 is installed on the side wall of the valve body 1, which moves laterally to push the shut-off ball 5 away from the valve port 2.1.1. The pusher device 6 is equipped with a return spring 7.

[0010] When a large gas leak occurs, gas exceeding the required flow rate will be ejected from the venting channel 4.2. The shut-off ball 5, placed at the venting channel opening, is pushed towards the valve port 2.1 by the venting airflow, sealing the valve port 2.1.1 and cutting off the airflow. After the handwheel 3 closes the valve 1.3, the pressure difference will keep the shut-off ball 5 in a sealed state, requiring the gas cylinder valve to be reset. At this time, simply push the pusher device 6 inward to push the shut-off ball 5 away from the valve port 2.1.1. The shut-off ball 5 will naturally fall onto the venting channel opening, and the gas cylinder valve can then return to normal operation. The pusher device is a conventional reciprocating pusher mechanism, which only needs to be installed in a sealed sliding manner with the side wall of the valve body 1. A return spring 7 is also added to drive the pusher device 6 to slide out and reset after the pusher action.

[0011] Specifically, the push device 6 includes a push part 6.1 that is slidably sealed and installed on the side wall of the valve body 1. The push part 6.1 forms a push rod 6.2 for pushing the cutting ball 5. A return spring 7 is installed between the push part 6.1 and the valve body 1 to keep the push device 6 sliding outward.

[0012] In this embodiment, the central channel of the tube seat 4 serves as a venting channel 4.2, and the outer wall forms a groove serving as a gas supply channel 4.1. A through hole 4.3 connecting the central channel and the groove is formed on the side wall of the tube seat 4. Under normal operating conditions, the gas inside the bottle flows out of the pipe connection port 1.1 through the tube seat 4, through hole 4.3, gas supply channel 4.1, and valve hole 2.1. When a large amount of gas leaks, excess gas flow will be ejected from the venting channel 4.2. Of course, the tube seat 4 can also adopt other structural forms to separate the gas supply channel 4.1 and the venting channel 4.2. For example, several notches can be directly opened at the central channel opening of the tube seat 4, with the notches serving as gas supply channels.

Claims

1. A gas cylinder overcurrent shut-off 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: A pipe seat is installed inside the gas cylinder connection port. The pipe seat has a gas supply channel and a discharge channel. A cut-off ball is placed at the top of the discharge channel. The lower end of the valve orifice of the valve is configured as a valve port that is sealed to cooperate with the cut-off ball. A pusher device that moves laterally and reciprocates to push the cut-off ball away from the valve port is installed on the side wall of the valve body. The pusher device is equipped with a return spring.

2. The overcurrent shut-off gas cylinder valve according to claim 1, characterized in that: The pushing device includes a sliding seal mounted on the side wall of the valve body, the pushing part forming a push rod for pushing and cutting the ball, and a return spring mounted between the pushing part and the valve body to maintain the pushing device's tendency to slide outward.

3. The overcurrent shut-off gas cylinder valve according to claim 1 or 2, characterized in that: The central channel of the tube seat is a venting channel, and the outer wall is formed with a groove as a gas passage. The side wall of the tube seat is formed with a through hole connecting the central channel and the groove.

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