Overflow cut-off gas cylinder valve
By installing an overflow cutoff mechanism at the air outlet of the cylinder valve, and using the cooperation of balls and springs, timely closing of the gas pipeline when it is damaged is achieved, major disaster problems caused by gas leakage are solved, and safety is ensured.
Patent Information
- Application Number
- CN202411256180.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2024-12-27
AI Technical Summary
When the gas pipeline is abnormally damaged, it is difficult for the existing technology to close the gas cylinder in time, resulting in gas leakage and may cause major disasters.
An overflow cutoff cylinder valve is designed, with an upper chamber and a lower chamber in the valve body. The overflow cutoff mechanism is installed on the air outlet, including a sealed core seat, a ball and a spring. The ball is pushed when the gas flow increases suddenly. Block the valve seat port and cut off gas leakage.
It realizes the timely closing of the gas cylinder valve when the gas pipeline is abnormally damaged to prevent gas leakage and effectively prevent major disasters.
Smart Images
Figure CN119196364A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of cylinder valves, and in particular to an over-flow cut-off cylinder valve which can automatically close a gas cylinder when a gas pipeline is abnormally damaged, resulting in a large amount of gas leakage. Background Art
[0002] In daily use, abnormal damage is unavoidable in gas pipelines. When gas pipelines are damaged, in most cases, people fail to discover them in time, resulting in a large amount of gas leakage, which in turn causes major disasters and accidents. Therefore, it is necessary to develop a gas cylinder valve that can close the gas cylinder in time when the gas pipeline is abnormally damaged. Summary of the invention
[0003] The technical problem to be solved by the present invention is to provide a gas cylinder valve which can close the gas cylinder in time when the gas pipeline is abnormally damaged.
[0004] The technical solution adopted to solve the above technical problems is: a flow cut-off gas cylinder valve, including a valve body, the valve body has an upper cavity and a lower cavity divided by a valve seat, the side of the valve body forms a transverse air outlet connected to the upper cavity, and an flow cut-off mechanism is installed in the air outlet, characterized in that: the flow cut-off mechanism includes a core seat sealed with the air outlet, the core seat has a through air outlet cavity, a valve seat opening is formed in the air outlet cavity, a ball with a clearance fit for sealing the valve seat opening and a first spring to maintain the tendency of the ball to move toward the valve seat opening are installed in the air outlet cavity.
[0005] On the basis of the above, a valve seat sleeve which is sealed and connected to the core seat and blocked by the core seat, and a second spring which keeps the core seat blocking the valve seat sleeve are installed in the air outlet.
[0006] On the basis of the above, the core seat is installed with a threaded nut, and a sealing ring of the valve seat sleeve is sandwiched between the nut and the core seat.
[0007] On the basis of the above, a pressure relief valve connected to the upper cavity is installed on the side of the valve body.
[0008] The beneficial effects brought by the use of the present invention are as follows: since the present invention installs an over-flow cut-off mechanism at the gas outlet of the gas cylinder valve, when the gas pipeline is abnormally damaged, the gas flow and flow velocity in the pipeline will suddenly increase, and the gas flow with the suddenly increased flow velocity and flow will push the ball to overcome the first spring and move toward the valve seat opening, thereby sealing the valve seat opening and cutting off the leakage of gas. Therefore, by using the over-flow cut-off gas cylinder valve of the present invention, the gas cylinder valve can be closed in time when the gas pipeline is abnormally damaged. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a structural schematic diagram of the over-flow cut-off gas cylinder valve of the present invention. DETAILED DESCRIPTION
[0010] like Figure 1 As shown, a flow cut-off gas cylinder valve includes a valve body 1, wherein the valve body 1 has an upper cavity 1.2 and a lower cavity 1.3 divided by a valve seat 1.1, and a lateral gas outlet 1.4 connected to the upper cavity 1.2 is formed on the side of the valve body 1, and an overflow cut-off mechanism is installed in the gas outlet 1.4. Usually, the valve body 1 has an air inlet 1.5 connected to the gas cylinder thread, a lateral gas outlet 1.4 connected to the gas pipeline, and a cavity connecting the air inlet 1.5 and the gas outlet 1.4, and a valve seat 1.1 is formed in the cavity. The valve seat 1.1 divides the cavity into an upper cavity 1.2 and a lower cavity 1.3, and a valve core 2 for sealing the valve seat 1.1 is installed in the upper cavity 1.2, and a hand wheel 11 for driving the valve core 2 to rise and fall is installed on the top of the valve body 1. In the present invention, the over-current cut-off mechanism includes a core seat 3 sealed with the air outlet 1.4, the core seat 3 has a through air outlet cavity 3.1, a valve seat opening 3.2 is formed in the air outlet cavity 3.1, a ball 4 with a clearance fit for blocking the valve seat opening 3.2 and a first spring 5 for maintaining the tendency of the ball 4 to move toward the valve seat opening 3.2 are installed in the air outlet cavity 3.1.
[0011] Under normal gas use, gas will flow out of the gas outlet 1.4 from the gas outlet cavity 3.1 of the core seat 3. At this time, the thrust of the airflow of the normal gas flow on the ball 4 alone cannot overcome the elastic force of the first spring 5 to push the ball 4 to block the valve seat opening 3.2. Since a gap is reserved between the ball 4 and the gas outlet cavity 3.1, the gas can flow through these gaps. When the gas pipeline is abnormally damaged, a large amount of gas will leak out, and the gas flow and flow rate in the pipeline will suddenly increase. The airflow with a sudden increase in flow rate and flow will push the ball 4 to overcome the elastic force of the first spring 5 and move toward the valve seat opening 3.2, blocking the valve seat opening 3.2 and cutting off the leakage of gas. The whole process can be completed almost instantly, with timely response, which can effectively prevent major disasters caused by gas leakage.
[0012] Of course, the sealed connection between the core seat 3 and the air outlet 1.4 can be connected to the air outlet 1.4 through other conventional parts in addition to directly connecting the air outlet 1.4. In this embodiment, the air outlet 1.4 is installed with a sealed core seat 3 and a valve seat sleeve 6 blocked by the core seat 3, and a second spring 7 that keeps the core seat 3 blocking the valve seat sleeve 6. The core seat 3, the valve seat sleeve 6 and the second spring 7 form a one-way valve structure that limits the flow in the air outlet direction. In this way, when inflating, the core seat 3 can be pushed open by a larger inflation pressure to achieve rapid inflation. When testing the gas cylinder, the core seat 3 can also be pushed open from the outside to achieve rapid exhaust and vacuum.
[0013] The core seat 3 can be sealed with a conventional sealing ring. Specifically, the core seat 3 is provided with a threaded nut 8, and a sealing ring 9 for blocking the valve seat sleeve 6 is sandwiched between the nut 8 and the core seat 3, which is convenient for processing and assembly.
[0014] When the pipeline is damaged and leaking, it is necessary to check the location of the damage and leakage. First, turn the hand wheel 11 to close the gas cylinder valve, and then complete the replacement and repair of the pipeline. At this time, the overcurrent cut-off mechanism needs to be reset. In order to facilitate the resetting of the overcurrent cut-off mechanism, a pressure relief valve 10 connected to the upper cavity 1.2 is installed on the side of the valve body 1. The pressure relief valve 10 is a conventional component, with a normally closed valve 10.1 installed inside and a button 10.2 installed outside. It is connected to the upper cavity 1.2 through the through hole 1.6. Pressing the button 10.2 can open the normally closed valve 10.1, and the upper cavity 1.2 is connected to the outside through the through hole 1.6 through the pressure relief valve 10. In this way, the upper cavity 1.2, which was originally in a high-pressure state, can be changed to a normal pressure state. The ball 4 leaves the valve seat mouth 3.2 under the elastic force of the first spring 5, and the overcurrent cut-off mechanism is reset.
Claims
1. An over-flow cut-off gas cylinder valve, comprising a valve body, the valve body having an upper cavity and a lower cavity divided by a valve seat, a lateral gas outlet connected to the upper cavity formed on the side of the valve body, an over-flow cut-off mechanism installed in the gas outlet, characterized in that: The over-current cut-off mechanism includes a core seat sealed with the air outlet, the core seat having a through air outlet cavity, a valve seat opening formed in the air outlet cavity, a ball with a clearance fit for sealing the valve seat opening and a first spring to maintain the tendency of the ball to move toward the valve seat opening are installed in the air outlet cavity.
2. The over-flow cut-off gas cylinder valve according to claim 1, characterized in that: A valve seat sleeve which is sealed and connected to the core seat and blocked by the core seat, and a second spring which keeps the core seat blocking the valve seat sleeve are installed in the air outlet.
3. The over-flow cut-off gas cylinder valve according to claim 2, characterized in that: The core seat is provided with a threaded nut, and a sealing ring for sealing the valve seat sleeve is sandwiched between the nut and the core seat.
4. The over-flow cut-off gas cylinder valve according to any one of claims 1 to 3, characterized in that: A pressure relief valve communicating with the upper cavity is installed on the side of the valve body.