A resealable container valve

Abstract

The application relates to a repeatedly openable container valve, and relates to the field of container valves. The valve body is internally provided with an inner cavity, the valve body is provided with an air inlet and an air outlet, the air inlet and the air outlet are communicated through the inner cavity, a piston is slidably arranged in the inner cavity, the piston is used for controlling the on-off of the air inlet and the air outlet, a pressure cavity is formed between the piston and the inner wall of the inner cavity, an elastic element is arranged in the inner cavity, the elastic element is used for pushing the piston to tend to cut off the air inlet and the air outlet, a pressure balance channel for communicating the pressure cavity and the air inlet is arranged on the piston, a pressure relief channel is arranged on the pressure cavity in communication, the pressure relief channel is used for rapidly relieving the pressure of the pressure cavity, and a control device for controlling the on-off of the pressure relief channel is arranged in the pressure relief channel. The application can realize the repeated opening and closing of the container valve, and can relieve the problem that the fire extinguishing agent in the steel cylinder is released at one time, thereby causing the waste of the fire extinguishing agent.

Description

Technical Field

[0001] This application relates to the field of container valves, and more particularly to a re-openable container valve. Background Technology

[0002] A container valve, also known as a cylinder valve, is a control valve installed at the outlet of a fire extinguishing agent storage container, such as a heptafluoropropane fire extinguishing storage cylinder. Its main function is to seal the fire extinguishing agent under normal conditions to prevent it from deteriorating or leaking, and to release the fire extinguishing agent automatically or manually in the event of a fire.

[0003] Traditional container valves typically rely on diaphragm puncture for opening. Once triggered, this mechanism cannot re-close, resulting in the complete release of the extinguishing agent stored in the cylinder. This design has significant drawbacks when dealing with small, easily controlled fires: even after the fire is effectively controlled or completely extinguished, the extinguishing agent continues to be sprayed, leading to excessive consumption and potentially unnecessary cleanup and environmental impact. Therefore, this irreversible opening characteristic of traditional container valves limits their applicability in situations requiring precise control of the extinguishing agent dosage. Summary of the Invention

[0004] In order to enable the repeated opening and closing of the container valve and alleviate the problem of extinguishing agent waste caused by the one-time release of extinguishing agent in the cylinder, this application provides a reusable container valve.

[0005] The re-openable container valve provided in this application adopts the following technical solution: A reusable container valve includes a valve body with an inner cavity. The valve body has an air inlet and an air outlet, which are connected through the inner cavity. A piston is slidably disposed in the inner cavity, and the piston moves to control the opening and closing of the air inlet and the air outlet. The piston and the inner wall of the inner cavity form a pressure chamber, and an elastic element is provided in the inner cavity. The elastic element is used to push the piston to tend to block the air inlet and the air outlet. The piston is provided with a pressure balance channel for connecting the pressure chamber and the air inlet. The pressure chamber is connected to a pressure relief channel, which is used to quickly relieve pressure in the pressure chamber. A control device is provided in the pressure relief channel to control the opening and closing of the pressure relief channel.

[0006] By adopting the above technical solution, the air inlet of the valve body is used to connect to the gas cylinder, and the air outlet of the valve body is used to connect to the fire pipeline or the discharge pipeline. The control device closes the pressure relief channel. In this state, the pressure in the pressure chamber and the air inlet are the same. Under the elastic force of the elastic element, the piston presses against the air inlet and seals the air inlet, so that the air inlet and the air outlet are disconnected. At this time, the container valve is in the closed state.

[0007] The control device opens the pressure relief channel, and the air pressure in the pressure chamber drops instantly. The air pressure at the inlet is the same as the air pressure in the cylinder. Under the force of the air pressure in the inlet, the piston is pushed to overcome the elastic force of the spring, the weight of the piston, and the air pressure in the pressure chamber, and moves away from the inlet, so that the inlet and outlet are connected. At this time, the container valve is in the open state.

[0008] In summary, the operator can control the opening and closing of the pressure relief valve through the control device, thereby controlling the container valve. When facing small-scale, easily controllable fires, the amount of extinguishing agent released can be controlled, reducing the waste of extinguishing agent.

[0009] Optionally, the diameter of the pressure relief channel is larger than the diameter of the pressure balance channel.

[0010] By adopting the above technical solution, when the pressure relief channel is opened, it is necessary to ensure that the pressure relief rate of the pressure chamber is greater than the pressure replenishment rate of the pressure chamber by the pressure balance channel, so as to achieve a rapid pressure relief effect.

[0011] Optionally, the control device includes a valve core disposed in the pressure relief channel. When the valve core is open, the diameter of the channel through which air flows in the valve core is larger than the diameter of the pressure balance channel. The valve body is provided with a pressing component for pressing the valve core switch.

[0012] By adopting the above technical solution, the valve core is set in the pressure relief channel, and the opening and closing of the pressure relief channel is controlled by the valve core. A switch is set on the valve core. When the valve core switch is pressed, the valve core opens, making the pressure relief channel open; when the valve core switch is released, the valve core closes, thereby sealing the pressure relief channel. The operator can press and release the valve core switch through the pressing component, thereby realizing the opening and closing control of the pressure relief channel.

[0013] Optionally, the pressing component is an electromagnet, and the movable part on the electromagnet extends into the pressure relief channel to press the valve core switch.

[0014] By adopting the above technical solution, the extension and retraction of the moving part of the electromagnet can be controlled by turning it on and off, thereby realizing the pressing and releasing action of the valve core switch. The operator can control the opening and closing of the container valve by controlling the electromagnet to turn it on and off, which simplifies the difficulty of controlling the opening and closing of aerosols.

[0015] Optionally, the elastic element is a spring, located within the pressure chamber, and pushes the piston toward blocking the air inlet.

[0016] By adopting the above technical solution, the spring is used to assist the piston in pressing against the air inlet when the pressure relief channel is closed, thereby improving the opening and closing stability of the container valve.

[0017] Optionally, the pressure relief channel is connected to the air outlet via a circulation channel.

[0018] By adopting the above technical solution, a circulation channel is set up to connect the pressure chamber and the air outlet. The pressure chamber can be depressurized through the air outlet, which is usually connected to the fire extinguishing pipeline. This allows the gas released from the pressure chamber to be utilized, reducing the waste of extinguishing agent.

[0019] Optionally, the piston is sealed to the cavity wall of the inner cavity through a first sealing member, and a second sealing member is provided at the end of the piston facing the air inlet, for sealing between the piston and the air inlet when the piston is pressed against the air inlet.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. The operator can control the opening and closing of the pressure relief valve through the control device to realize the opening and closing of the container valve. It can realize the function of opening and closing the container valve multiple times. When facing some small-scale and easily controllable fires, the amount of extinguishing agent released can be controlled to reduce the waste of extinguishing agent. 2. A circulation channel is set up to connect the pressure chamber and the air outlet. The pressure chamber can be depressurized through the air outlet, which is usually connected to the fire extinguishing pipeline. This allows the gas released from the pressure chamber to be utilized, reducing the waste of extinguishing agent. Attached Figure Description

[0021] Figure 1 This is an overall cross-sectional view of Embodiment 1 of this application.

[0022] Figure 2 This is a cross-sectional view of Embodiment 1 of this application, showing the container valve in the open state.

[0023] Figure 3 This is a cross-sectional view of the valve body used in Embodiment 1 of this application.

[0024] Figure 4 This is a cross-sectional view of Embodiment 1 of this application used to illustrate an electromagnet.

[0025] Figure 5 This is a cross-sectional view of Embodiment 2 of this application used to illustrate the circulation channel.

[0026] Explanation of reference numerals in the attached drawings: 1. Valve body; 11. Inner cavity; 12. Air outlet; 13. Air inlet; 14. Piston; 15. Pressure chamber; 16. Pressure relief channel; 17. Pressure balance channel; 2. First seal; 21. Second seal; 22. Elastic element; 3. Control device; 31. Valve core; 32. Switch; 4. Pressing assembly; 41. Electromagnet; 5. Circulation channel. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail. Example 1

[0028] This application discloses a re-openable container valve. For example... Figure 1 and Figure 2 The reusable container valve includes a valve body 1, within which an inner cavity 11 is provided. In this embodiment, the inner cavity 11 is cylindrical, and the valve body 1 is provided with an outlet 12 and an inlet 13, which are connected through the inner cavity 11. The inlet 13 is connected to one end of the inner cavity 11, and the outlet 12 is connected to the cylindrical wall of the inner cavity 11. A piston 14 is provided in the inner cavity 11 of the valve body 1. The piston 14 is slidably disposed within the valve body 1 along the axial direction of the inner cavity 11, and moves towards or away from the inlet 13. When the piston 14 moves towards the inlet 13, it can close the inlet 13, thus disconnecting the outlet 12 from the inlet 13; when the piston 14 moves away from the inlet 13, it can release the closing effect on the inlet 13, thus connecting the outlet 12 and the inlet 13.

[0029] The piston 14 is provided with a first seal 2 around the direction of movement. The piston 14 is sealed with the cavity wall of the inner cavity 11 through the first seal 2. By providing the first seal 2, the piston 14 is sealed with the cavity wall of the inner cavity 11 during the sliding process. That is, the pressure chamber 15 is directly connected to the air inlet 13 only through the pressure balance channel 17.

[0030] A second seal 21 is provided at one end of the piston 14 facing the air inlet 13. When the piston 14 moves close to the air inlet 13 and needs to seal the air inlet 13, the second seal 21 presses against the wall of the air inlet 13 facing the inner cavity 11 to achieve a sealing effect on the air inlet 13, thereby isolating the air inlet 13 and the air outlet 12.

[0031] Both the first sealing element 2 and the second sealing element 21 are elastic sealing materials. In the embodiments of this application, both the first sealing element 2 and the second sealing element 21 are rubber sealing rings.

[0032] like Figure 2 and Figure 3The valve body 1 forms a pressure chamber 15 between the end of its inner cavity 11 away from the air inlet 13 and the piston 14. The piston 14 has a pressure balancing channel 17 connecting the pressure chamber 15 and the air inlet 13. An elastic element 22 is provided inside the valve body 1 to push the piston 14 to seal the air inlet 13. The elastic element 22 can be a tension spring, spring, etc. In this embodiment, the elastic element 22 is a spring located inside the pressure chamber 15, and the spring exerts a force on the piston 14 to move towards the air inlet 13. A pressure relief channel 16 is provided inside the pressure chamber 15 for rapid pressure relief. A control device 3 is provided inside the pressure relief channel 16 to control its opening and closing. The diameter of the pressure relief channel 16 is larger than the diameter of the pressure balancing channel 17, which is between 0.2-0.6 mm. In this embodiment, the diameter of the pressure balancing channel 17 is 0.5 mm.

[0033] The control device 3 includes a valve core 31 disposed within the pressure relief passage 16. A switch 32 is provided on the valve core 31. Pressing the switch 32 opens the valve core 31, connecting the pressure relief passage 16; releasing the switch 32 closes the valve core 31, disconnecting the pressure relief passage 16. When the valve core 31 is open, the diameter of the airflow passage within the valve core 31 is larger than the diameter of the pressure balance passage 17.

[0034] like Figure 3 and Figure 4 The valve body 1 is provided with a pressing assembly 4 for pressing the valve core 31 switch 32. The pressing assembly 4 can be a linkage mechanism or device with a pushing function, such as a push rod and an electromagnet 41, or a drive device that works with a crank-connecting rod mechanism or a cam mechanism to achieve the pushing operation. In this embodiment, the pressing assembly 4 is an electromagnet 41 fixedly connected to the valve body 1. The moving part of the electromagnet 41 extends into the pressure relief channel 16. When the electromagnet 41 is de-energized, the moving part of the electromagnet 41 is away from the valve core 31 switch 32, and the pressure relief channel 16 is closed. When the electromagnet 41 is energized, the moving part of the electromagnet 41 extends out and pushes the valve core 31 switch 32, so that the valve core 31 is opened. In this state, the pressure relief channel 16 is open, realizing the function of rapid pressure relief of the pressure chamber 15.

[0035] When the container valve is closed, the electromagnet 41 is de-energized, the valve core 31 remains in a state of blocking the pressure relief channel 16, and the piston 14 is pressed against the air inlet 13 under the elastic force of the spring, isolating the air inlet 13 and the air outlet 12. When the valve body 1 is installed on the gas cylinder, the pressure chamber 15 and the air inlet 13 in this state are kept in balance by the connection of the pressure balance channel 17, thus achieving a seal on the gas cylinder.

[0036] When the container valve needs to be opened, the operator energizes the electromagnet 41. The moving part of the electromagnet 41 pushes the valve core 31 switch 32, causing the valve core 31 to open, thereby opening the pressure relief channel 16 and achieving rapid pressure relief of the pressure chamber 15. The pressure in the pressure chamber 15 drops instantaneously, while the pressure at the air inlet 13 remains consistent with the gas pressure inside the cylinder. The piston 14 is pushed by the gas pressure at the air inlet 13, causing the piston 14 to overcome its own gravity, the gas pressure in the pressure chamber 15, and the elastic force of the spring, moving away from the air inlet 13, thereby connecting the air inlet 13 and the air outlet 12, thus opening the container valve.

[0037] When the container valve needs to be closed again, the operator de-energizes the electromagnet 41, the moving part of the solenoid valve retracts, and the switch 32 of the valve core 31 resets, causing the valve core 31 to close, thereby sealing the pressure relief channel 16. Since the pressure chamber 15 stops depressurizing, under the action of the pressure balance channel 17, the air pressure in the pressure chamber 15 gradually increases. When the sum of the air pressure in the pressure chamber 15, the spring force, and its own weight exceeds the pressure at the position of the cylinder and the air inlet 13, the piston 14 will move towards the air inlet 13 and block it, thus isolating the air inlet 13 from the air outlet 12, achieving the effect of closing the container valve.

[0038] In summary, the operator can control the energization and de-energization of the electromagnet 41 to open and close the container valve, enabling it to be repeatedly opened. The operator can control the amount of extinguishing agent released according to the fire situation. Compared to the single-release of a diaphragm-type container valve, the container valve in this application reduces extinguishing agent waste and allows for multiple releases in the event of a reignition, thus improving the safety of the valve. Example 2

[0039] like Figure 5 The rest of the embodiments in this application are the same as those in Embodiment 1, except that the pressure relief channel 16 of the valve body 1 is not directly connected to the outside, but is connected to the air outlet 12 through the circulation channel 5.

[0040] Normally, the air outlet 12 of the valve body 1 is connected to the fire pipeline. When the container valve is opened, the extinguishing agent in the cylinder enters the fire pipeline through the container valve and is sprayed through the fire nozzle on the fire pipeline to achieve the fire extinguishing effect.

[0041] By connecting the pressure relief channel 16 to the air outlet 12, the purpose is to reduce the leakage of extinguishing agent from the pressure relief channel 16 to the outside during the pressure relief process of the pressure chamber 15.

[0042] Principle of Example 2: When the container valve needs to be opened, the operator activates the electromagnet 41 to push the valve core 31 switch 32, thus opening the pressure relief channel 16 and connecting the pressure chamber 15 and the outlet 12. This causes the air pressure in the pressure chamber 15 to drop instantaneously, while the air pressure at the container valve inlet 13 remains the same as the air pressure inside the cylinder. Under the force of the air pressure at the container valve inlet 13, the piston 14 is pushed to move against the spring force, gradually releasing the seal on the inlet 13, connecting the inlet 13 and the outlet 12, thus opening the container valve and reducing the waste of extinguishing agent.

[0043] During this process, when the pressure chamber 15 is depressurized, the extinguishing agent in it flows through the depressurization channel 16 and the circulation channel 5 to the outlet 12 and enters the fire pipeline, reducing the possibility of fire extinguisher leakage during the opening of the container valve.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A reusable container valve, characterized in that: Includes a valve body (1), the valve body (1) is provided with an inner cavity (11), the valve body (1) is provided with an air inlet (13) and an air outlet (12), and the air inlet (13) and the air outlet (12) are connected through the inner cavity (11), and a piston (14) is slidably provided in the inner cavity (11), the piston (14) moves to control the opening and closing of the air inlet (13) and the air outlet (12); The piston (14) and the inner wall of the inner cavity (11) form a pressure chamber (15), and an elastic element (22) is provided in the inner cavity (11). The elastic element (22) is used to push the piston (14) to tend to block the air inlet (13) and the air outlet (12). The piston (14) is provided with a pressure balance channel (17) for connecting the pressure chamber (15) and the air inlet (13). The pressure chamber (15) is connected to a pressure relief channel (16), which is used to quickly relieve pressure in the pressure chamber (15). A control device (3) is provided in the pressure relief channel (16) to control the opening and closing of the pressure relief channel (16).

2. The reusable container valve according to claim 1, characterized in that: The diameter of the pressure relief channel (16) is larger than the diameter of the pressure balance channel (17).

3. The reusable container valve according to claim 1, characterized in that: The control device (3) includes a valve core (31) disposed in the pressure relief channel (16). When the valve core (31) is open, the diameter of the channel through which the airflow passes is larger than the diameter of the pressure balance channel (17). The valve body (1) is provided with a pressing component (4) for pressing the valve core (31) switch (32).

4. A reusable container valve according to claim 3, characterized in that: The pressing assembly (4) is an electromagnet (41), and the moving part on the electromagnet (41) extends into the pressure relief channel (16) to press the valve core (31) switch (32).

5. A reusable container valve according to claim 1, characterized in that: The elastic element (22) is a spring, which is located in the pressure chamber (15) and pushes the piston (14) to block the air inlet (13).

6. A reusable container valve according to any one of claims 1-5, characterized in that: The pressure relief channel (16) is connected to the air outlet (12) through the circulation channel (5).

7. A reusable container valve according to claim 1, characterized in that: The piston (14) is sealed to the cavity wall of the inner cavity (11) through the first sealing member (2). The piston (14) is provided with a second sealing member (21) at one end facing the air inlet (13) to achieve a seal between the piston (14) and the air inlet (13) when the piston (14) is pressed against the air inlet (13).

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