Container valve capable of being opened repeatedly

Abstract

The utility model relates to a container valve capable of being opened repeatedly, and relates to the technical field of valves. The check valve comprises a valve body, the valve body is provided with an inlet, an outlet and a first sliding way, the inlet and the outlet are communicated through the first sliding way, the valve body is provided with a valve element in the first sliding way in a sliding mode, and the valve element can move to control connection and disconnection between the inlet and the outlet; the first elastic piece is used for pushing the valve element to abut against the inlet so that the inlet and the outlet can be separated, and the end face, deviating from the inlet and the outlet, of the valve element and the inner wall of the first sliding way form a pressure cavity. The container valve can be opened and closed repeatedly, and the flexibility and the overall fire extinguishing efficiency of a fire extinguishing system are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of valve technology, in particular to a container valve capable of repeated opening. BACKGROUND

[0002] In the field of high-pressure gas storage and transmission, container valves as key components, their performance and reliability are key indicators to measure the safety and operational efficiency of the entire gas management system. The traditional design of container valves is often limited to single-use mode, which is rigid in the face of changing practical application environment, limiting the flexibility and overall efficiency of system operation. Especially in the field of fire fighting, electrically controlled container valves are widely adopted due to their remote control characteristics. However, such valves cannot be re-closed after completing an opening operation, resulting in the release of all extinguishing agents in the cylinder at one time. In the face of possible rekindling at the fire scene, this design obviously cannot provide sustained and effective fire extinguishing support, making it difficult to control the rekindling fire point in time.

[0003] In addition, the one-time discharge container valve is often emptied at one time when discharging extinguishing agents, and the amount of extinguishing agent cannot be controlled by the opening and closing of the container valve. The operator cannot accurately control the amount of extinguishing agent according to the actual size of the fire, which not only leads to excessive consumption and waste of extinguishing agents when the fire source is small, but also, after the extinguishing agent tank is completely emptied, if the fire source rekindles in a short time, the system will lack immediate fire extinguishing capability and pose a potential safety risk. Therefore, developing a new type of container valve capable of multiple opening and closing is crucial to improving the flexibility and overall fire extinguishing efficiency of the fire fighting system. CONTENT OF THE INVENTION

[0004] In order to realize the multiple opening and closing of the container valve and improve the flexibility and overall fire extinguishing efficiency of the fire fighting system, the present application provides a container valve capable of repeated opening.

[0005] The container valve capable of repeated opening provided by the present application adopts the following technical solution:

[0006] A container valve capable of repeated opening, comprising a valve body, an inlet, an outlet and a first sliding channel are arranged on the valve body, and the inlet and the outlet are communicated through the first sliding channel, a valve core is arranged in the first sliding channel and slides relative to the valve body, the movement of the valve core can control the on-off between the inlet and the outlet, a first elastic member is arranged in the first sliding channel of the valve body, the first elastic member is used to push the valve core against the inlet to be able to cut off the inlet and the outlet, and the end face of the valve core away from the inlet and the outlet forms a pressure cavity with the inner wall of the first sliding channel.

[0007] The valve body is provided with two groups of pressure channels communicated with the pressure cavity, one group of the pressure channels is used for communicating with the inlet and supplementing pressure by the gas pressure in the cylinder, and the other group of the pressure channels is used for communicating with the outside of the valve body and relieving pressure of the pressure cavity, and the valve body is provided with a control device used for controlling the pressure cavity to communicate with one group of the pressure channels.

[0008] By adopting the technical scheme, in the initial state, the container valve is in a sealed state, in which state, the control device is used for controlling the pressure cavity to communicate with the pressure channel for supplementing pressure and sealing the pressure channel for relieving pressure, so that the gas pressure in the pressure cavity is the same as that in the inlet, and the valve core is kept in a state of blocking the inlet and the outlet under the elastic force of the first elastic member.

[0009] When it is needed to open the container valve, the operator needs to control the control device to control the pressure cavity to communicate with the pressure channel for relieving pressure and seal the pressure channel for supplementing pressure, so that the pressure cavity is rapidly relieved, the valve body is pushed to move under the gas pressure in the inlet being greater than the gas pressure in the pressure cavity and the elastic force of the first elastic member, and the valve core is moved to remove the blocking effect on the inlet and the outlet, thereby realizing the opening effect of the container valve.

[0010] When it is needed to repeatedly close, the operator needs to control the control device to control the pressure cavity to communicate with the pressure channel for supplementing pressure and seal the pressure channel for relieving pressure, so that the gas pressure in the pressure cavity gradually rises to approach the gas pressure in the inlet, and the valve core is moved and blocks the inlet and the outlet again under the elastic force of the first elastic member, thereby realizing the sealing of the container valve.

[0011] The control device is used for controlling the pressure cavity to communicate with the pressure channel for supplementing pressure or the pressure channel for relieving pressure, thereby controlling the gas pressure in the pressure cavity, and the elastic force of the first elastic member is used to control the movement of the valve core, thereby controlling the connection and disconnection between the inlet and the outlet, and realizing the repeated opening effect of the container valve.

[0012] Optionally, the control device comprises a sliding block, the valve body is provided with a second sliding channel communicated with the pressure cavity, the sliding block is slidingly arranged in the second sliding channel, the movement of the sliding block can control the connection and disconnection of one group of the pressure channels, and the other group of the pressure channels is correspondingly provided with a valve core, the valve core is provided with a switch, the switch can control the connection and disconnection of the corresponding pressure channel of the valve core, and the valve body is provided with a control assembly, the control assembly can push or release the switch of the valve core and control the movement of the sliding block.

[0013] By adopting the technical scheme, the control assembly controls the movement of the sliding block and can push or release the switch of the valve core, thereby controlling the opening and closing of one group of pressure channels. In the process of controlling the movement of the sliding block, the valve core is pressed or released, thereby controlling the opening and closing of the other group of pressure channels, realizing the control effect of the gas pressure in the pressure chamber, and driving the valve core to move to control the opening and closing of the inlet and outlet, thereby realizing the effect of repeatedly opening the container valve.

[0014] Optionally, the sliding of the sliding block is used to control the opening and closing of the pressure channel for pressure compensation. A connecting channel for connecting the pressure chamber and the pressure channel for pressure relief is arranged on the sliding block, and the valve core is arranged in the connecting channel.

[0015] By adopting the technical scheme, the operator controls the movement of the valve core to control the opening and closing of the pressure channel for pressure compensation and the opening and closing of the valve core to control the opening and closing of the pressure channel for pressure relief, thereby being able to control the pressure chamber to be connected to the pressure channel for pressure compensation or the pressure channel for pressure relief.

[0016] Optionally, the control assembly comprises a second elastic member arranged in the second sliding channel, which is used to push the sliding block to make the pressure channel for pressure compensation tend to be connected to the pressure chamber. A pushing unit for pushing the sliding block and the valve core is arranged on the valve body. The pushing unit can push the sliding block to move, so that the pressure channel for pressure compensation tends to be disconnected from the pressure chamber, and press the switch of the valve core.

[0017] By adopting the technical scheme, the pushing unit and the second elastic member cooperate to move the control sliding block, thereby controlling the opening and closing of the pressure channel for pressure compensation. In the process of pushing the sliding block by the control assembly, the valve core is also pushed or released, thereby controlling the opening and closing of the pressure channel for pressure relief.

[0018] Optionally, the pushing unit is a first electromagnet, and a moving part of the first electromagnet extends into the valve body and is used to simultaneously push the sliding block to press or release the switch of the valve core.

[0019] By adopting the technical scheme, in the process of opening the container valve, the first electromagnet is energized to make its moving part extend out, and the moving part of the first electromagnet moves towards the switch of the valve core. In this process, the switch of the valve core is first pressed to make the connecting channel through, thereby making the pressure channel for pressure relief connected to the pressure chamber. The first electromagnet continues to extend out, the moving part of the first electromagnet pushes the push block to make the push block move, thereby making the push block seal the pressure channel for pressure compensation. In this state, the gas pressure in the pressure chamber instantaneously decreases. Since the inlet of the valve body is connected to the steel cylinder, the gas pressure of the inlet of the valve body is greater than the gas pressure of the pressure chamber and the elastic force of the first elastic member, thereby pushing the valve core to move and gradually releasing the sealing effect to connect the inlet and the outlet.

[0020] Optionally, in the compression state of the pressure cavity, the valve core moves to connect the inlet and the outlet; in the expansion state of the pressure cavity, the valve core moves to cut off the inlet and the outlet.

[0021] Optionally, the control device comprises a moving seat, the valve body is provided with a third sliding channel communicated with the pressure cavity, the pressure channel for pressure compensation and the pressure channel for pressure relief are both communicated with the third sliding channel, the moving seat is slidingly arranged in the third sliding channel, the moving seat is provided with an inner cavity, one end of the inner cavity is open to the pressure cavity and is communicated with each other, a through slot communicated with the inner cavity is formed in the peripheral wall of the moving seat, the moving seat is moved so that the through slot can be communicated with the pressure channel for pressure compensation or the pressure channel for pressure relief, and the valve body is provided with a driving unit for controlling the movement of the moving seat.

[0022] By adopting the above technical scheme, the operator drives the moving seat to move through the driving unit, and then drives the inner cavity to be communicated with the pressure channel for pressure compensation or the pressure channel for pressure relief, so that the pressure cavity is communicated with the pressure channel for pressure compensation or the pressure channel for pressure relief, and then the air pressure in the pressure cavity is controlled, and the elastic force of the first elastic member is used to control the movement of the valve core, and then the connection and disconnection between the inlet and the outlet are controlled, so that the effect of repeatedly opening the container valve is realized.

[0023] Optionally, the driving unit comprises a second electromagnet, a moving part of the second electromagnet extends into the valve body and can push the moving seat, so that the inner cavity of the moving seat tends to be communicated with the pressure channel for pressure relief, and a third elastic member is arranged in the third sliding channel, the third elastic member is used to push the moving seat, so that the inner cavity of the moving seat tends to be communicated with the pressure channel for pressure compensation.

[0024] By adopting the above technical scheme, the on-off control of the second electromagnet controls the extension and retraction of the corresponding moving part, and then drives the moving seat to move, so as to control the pressure cavity to be communicated with the pressure channel for pressure compensation or the pressure channel for pressure relief, and then control the air pressure in the pressure cavity.

[0025] In summary, the present application has at least one of the following beneficial technical effects: the control device is used to control the pressure cavity to be communicated with the pressure channel for pressure compensation or the pressure channel for pressure relief, and then control the air pressure in the pressure cavity, and the elastic force of the first elastic member is used to control the movement of the valve core, and then the connection and disconnection between the inlet and the outlet are controlled, so that the effect of repeatedly opening the container valve is realized. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a whole structure schematic view of embodiment 1 of the present application.

[0027] Figure 2is a sectional view of the pressure channel used by the embodiment 1 of the present application.

[0028] Figure 3 is Figure 2 is an enlarged schematic view of part A in the middle.

[0029] Figure 4 is a sectional view of the pressure channel used by the embodiment 2 of the present application.

[0030] Figure 5 is Figure 4 is an enlarged schematic view of part B in the middle.

[0031] Reference signs: 1, valve body; 11, inlet; 12, outlet; 13, first sliding channel; 14, valve core; 15, pressure cavity; 16, first elastic member; 17, pressure channel; 2, sliding block; 21, connecting channel; 22, valve core; 23, second sliding channel; 31, second elastic member; 4, pushing unit; 41, first electromagnet; 5, moving seat; 51, third sliding channel; 52, inner cavity; 53, through slot; 6, driving unit; 61, second electromagnet; 62, third elastic member. DETAILED DESCRIPTION

[0032] The following will be described in detail in combination with the accompanying drawings. Figures 1-5 The present application will be further described in detail. Embodiment 1

[0033] The present application discloses a repeatable opening container valve. As shown in Figure 1 and Figure 2 The repeatable opening container valve comprises a valve body 1, and the valve body 1 is provided with an inlet 11, an outlet 12 and a first sliding channel 13. The inlet 11 and the outlet 12 are communicated through the first sliding channel 13. A valve core 14 is arranged to slide in the first sliding channel 13, and the movement of the valve core 14 can control the on-off between the inlet 11 and the outlet 12, thereby controlling the opening and closing of the container valve.

[0034] The valve body 1 is provided with a first elastic member 16 in the first sliding channel 13, and the first elastic member 16 is used to push the valve core 14 to abut against the inlet 11, thereby cutting off the inlet 11 and the outlet 12. The end face of the valve core 14 away from the inlet 11 and the outlet 12 forms a pressure cavity 15 with the inner wall of the first sliding channel 13. The first elastic member 16 can be an elastic sheet, a spring or a disc spring, and the first elastic member 16 in the embodiment of the present application is a first spring.

[0035] As shown in Figure 2 and Figure 3Two groups of pressure channels 17 are formed on the valve body 1 and communicate with the pressure chamber 15, and are used for pressure compensation and pressure relief of the pressure chamber 15 respectively. The pressure compensation channel 17 is used for direct or indirect communication with the inlet 11, and the pressure compensation is achieved by the gas pressure in the cylinder. The pressure relief channel 17 is used for communication with the outside of the valve body 1, and is used for pressure relief of the pressure chamber 15.

[0036] A control device is arranged in the pressure chamber 15, and is used for controlling the communication of the pressure chamber 15 with the pressure compensation channel 17 or the pressure relief channel 17.

[0037] Specifically, the control device includes a sliding block 2, and a second sliding channel 23 is arranged on the valve body 1 and communicates with the pressure chamber 15. The sliding block 2 is arranged in the second sliding channel 23 in a sliding manner, and the movement of the sliding block 2 can control the on-off of one group of pressure channels 17. The other group of pressure channels 17 is provided with a valve core 22, and a switch is arranged on the valve core 22 to control the on-off of the corresponding pressure channel 17.

[0038] In the embodiment, the movement of the sliding block 2 is used to control whether the pressure compensation channel 17 communicates with the pressure chamber 15. A connecting channel 21 is formed on the sliding block 2 and is used for communication between the pressure chamber 15 and the pressure relief channel 17. The valve core 22 is arranged in the connecting channel 21, and the switch part of the valve core 22 extends out of the connecting channel 21. The switch of the valve core 22 is used to control the on-off of the connecting channel 21, and further control the on-off between the pressure chamber 15 and the pressure relief channel 17.

[0039] A control assembly is further arranged on the valve body 1, and is used to push or release the switch of the valve core 22 and control the movement of the sliding block 2. The control assembly can be an electric push rod, a screw nut structure driven by a motor or a connecting mechanism.

[0040] In the embodiment, the control assembly includes a second elastic member 31 arranged in the second sliding channel 23, and the second elastic member 31 is used to push the sliding block 2 so that the pressure compensation channel 17 tends to communicate with the pressure chamber 15. A pushing unit 4 is further arranged on the valve body 1 and is used to push the sliding block 2 and the valve core 22. The pushing unit 4 is a first electromagnet 41, and the moving part of the first electromagnet 41 extends into the valve body 1 and can simultaneously push the sliding block 2 and press or release the switch of the valve core 22. The second elastic member 31 can be an elastic sheet, a spring or a disc spring, and the second elastic member 31 in the embodiment is a second spring.

[0041] Principle of embodiment 1: The valve body 1 is installed on the cylinder, and the inlet 11 of the valve body 1 communicates with the opening of the cylinder. The cylinder stores compressed fire extinguishing agent, and the pressure in the cylinder is greater than the atmospheric pressure.

[0042] Initial state: the first electromagnet 41 is in the power-off state, the moving part corresponding to the first electromagnet 41 is retracted, the second spring pushes the slider 2 to move to the state close to the first electromagnet 41, so that the pressure channel 17 for pressure compensation is in communication with the pressure chamber 15. At this time, the moving part of the first electromagnet 41 and the switch of the valve core 22 are far away from each other, so that the valve core 22 is in the closed state, the connecting channel 21 is sealed, and the pressure channel 17 for pressure relief is not in communication with the pressure chamber 15. The air pressure in the pressure chamber 15 is the same as the air pressure of the inlet 11 of the valve body 1, and under the action of the first spring, the valve core 14 abuts against the inlet 11, so that the inlet 11 and the outlet 12 are cut off, and at this time the container valve is in the sealed state.

[0043] Opening process: when the container valve needs to be opened, the first electromagnet 41 is powered on, so that the moving part thereof extends. In this process, the moving part of the first electromagnet 41 first presses the switch of the valve core 22, so that the connecting channel 21 is through, and then the pressure channel 17 for pressure relief is in communication with the pressure chamber 15. With the continuous extension of the first electromagnet 41, the moving part thereof pushes the slider 2 to move, so that the pressure channel 17 for pressure compensation tends to be cut off from the pressure chamber 15. At this time, the air pressure in the pressure chamber 15 rapidly decreases, and since the inlet 11 of the valve body 1 is connected to the steel cylinder, the air pressure of the inlet 11 is greater than the air pressure of the pressure chamber 15 and the elastic force of the first spring, so as to push the valve core 14 to move and remove the cutting effect on the inlet 11 and the outlet 12, thereby realizing the opening of the container valve.

[0044] Closing process: when the container valve needs to be closed, the first electromagnet 41 is powered off, the moving part thereof is retracted, and the second spring pushes the slider 2 to reset, so that the pressure channel 17 for pressure compensation is in communication with the pressure chamber 15. At the same time, the moving part of the first electromagnet 41 is away from the switch of the valve core 22, the switch of the valve core 22 is automatically reset, thereby closing the connecting channel 21, so that the pressure channel 17 for pressure relief is cut off from the pressure chamber 15. With the communication of the pressure channel 17 for pressure compensation, the air pressure in the pressure chamber 15 gradually increases to approach the air pressure of the inlet 11. Under the auxiliary action of the first spring, the valve core 14 moves and abuts against the inlet 11 again, thereby realizing the sealing of the container valve.

[0045] In summary, the operator can control the power-on and power-off of the first electromagnet 41, thereby controlling the connection of the pressure chamber 15 to the pressure channel 17 for pressure relief or the pressure channel 17 for pressure compensation, so as to control the pressure relief or pressure compensation of the pressure chamber 15, and then drive the valve core 14 to move under the action of the elastic force of the first spring, so as to realize the opening and closing of the inlet 11 and the outlet 12. Embodiment 2

[0046] As Figure 4 and Figure 5The difference between the embodiment 2 and the embodiment 1 is that the structure of the control device is different. The control device in the embodiment 2 comprises a moving seat 5, the valve body 1 is provided with a third sliding channel 51 which is communicated with the pressure cavity 15, and the moving seat 5 is slidably arranged in the third sliding channel 51. The moving seat 5 is provided with an inner cavity 52 which is open at one end and communicated with each other. The peripheral wall of the moving seat 5 is provided with a through slot 53 which is communicated with the inner cavity 52, and the pressure channel 17 for pressure compensation and the pressure channel 17 for pressure relief are both communicated with the third sliding channel 51, and the movement of the moving seat 5 can control the inner cavity 52 to be communicated with the pressure channel 17 for pressure compensation or the pressure channel 17 for pressure relief.

[0047] The valve body 1 is provided with a driving unit 6 for controlling the movement of the moving seat 5, and the driving unit 6 can be an electric push rod, a motor-driven screw nut structure or a connecting mechanism.

[0048] In the embodiment, the driving unit 6 comprises a second electromagnet 61, the moving part of the second electromagnet 61 extends into the valve body 1 and can push the moving seat 5, so that the inner cavity 52 of the moving seat 5 tends to be communicated with the pressure channel 17 for pressure relief. The third sliding channel 51 is provided with a third elastic member 62, and the third elastic member 62 is used to push the moving seat 5, so that the inner cavity 52 of the moving seat 5 tends to be communicated with the pressure channel 17 for pressure compensation. The third elastic member 62 can be an elastic sheet, a spring or a disc spring, and the third elastic member 62 in the embodiment is a third spring.

[0049] The principle of the embodiment 2 is that the valve body 1 is installed on the steel cylinder, the inlet 11 of the valve body 1 is communicated with the opening of the steel cylinder, the extinguishing agent is stored in the steel cylinder, and the pressure of the extinguishing agent in the steel cylinder is greater than the atmospheric pressure.

[0050] The initial state is that the second electromagnet 61 is in the power-off state, the moving part of the second electromagnet 61 is retracted, the third spring pushes the moving seat 5, so that the inner cavity 52 is communicated with the pressure channel 17 for pressure compensation, and the inner cavity 52 is disconnected with the pressure channel 17 for pressure relief through the through slot 53. At this time, the air pressure in the pressure cavity 15 is communicated with the inlet 11 through the pressure channel 17 for pressure compensation, so that the air pressure in the pressure cavity 15 and the air pressure of the inlet 11 of the valve body 1 are kept in the balanced state. And under the action of the first spring, the valve core 14 is stably abutted to the inlet 11, so that the inlet 11 and the outlet 12 are disconnected, and the container valve is in the sealed state.

[0051] Opening process: when the container valve needs to be opened, the moving part of the second electromagnet 61 is energized to extend out, which pushes the moving seat 5 to move, so that the inner cavity 52 tends to be connected with the pressure relief pressure channel 17 and tends to be isolated from the pressure compensation pressure channel 17. As the pressure relief pressure channel 17 is connected with the pressure cavity 15, the air pressure in the pressure cavity 15 is instantaneously reduced. Since the inlet 11 is connected with the steel cylinder, the air pressure of the inlet 11 is higher than the air pressure of the pressure cavity 15 and the elastic force of the first spring, so the valve core 14 is pushed and the isolation effect of the inlet 11 and the outlet 12 is removed, realizing the opening of the container valve.

[0052] Closing process: when the container valve needs to be closed, the moving part of the second electromagnet 61 is de-energized to retract, and the third spring pushes the moving seat 5 to reset, so that the inner cavity 52 is connected with the pressure compensation pressure channel 17. At this time, the air pressure in the pressure cavity 15 is in a balanced state with the air pressure of the inlet 11 of the valve body 1. Under the elastic force of the first spring, the valve core 14 moves and again abuts against the inlet 11, realizing the sealing of the container valve.

[0053] The operator can control the on-off of the second electromagnet 61, and then control the connection of the pressure cavity 15 with the pressure relief pressure channel 17 or the pressure compensation pressure channel 17, so as to control the pressure relief or pressure compensation of the pressure cavity 15, and then drive the valve core 14 to move under the elastic force of the first spring, so as to realize the on-off between the inlet 11 and the outlet 12, and realize the repeated opening and closing of the container valve.

[0054] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A resealable container valve comprising a valve body (1) having an inlet (11), an outlet (12) and a first slide (13) formed therein, the inlet (11) and outlet (12) being in communication via the first slide (13), a valve core (14) being slidably disposed within the first slide (13) of the valve body (1), the valve core (14) being movable to control the opening and closing of the inlet (11) and outlet (12), characterised in that: The valve body (1) is provided with a first elastic member (16) in the first sliding channel (13), which is used to push the valve core (14) against the inlet (11) to cut off the inlet (11) and the outlet (12), and the end face of the valve core (14) away from the inlet (11) and the outlet (12) forms a pressure chamber (15) with the inner wall of the first sliding channel (13); The valve body (1) is provided with two groups of pressure channels (17) communicating with the pressure chamber (15), one group of the pressure channels (17) is used to communicate with the inlet (11) and supplement the pressure through the gas pressure in the cylinder, and the other group of the pressure channels (17) is used to communicate with the outside of the valve body (1) and is used for pressure relief of the pressure chamber (15), and the valve body (1) is provided with a control device for controlling the pressure chamber (15) to communicate with one group of the pressure channels (17).

2. A resealable container valve according to claim 1, characterised in that: The control device includes a sliding block (2), the valve body (1) is provided with a second sliding channel (23) communicating with the pressure chamber (15), the sliding block (2) is slidingly arranged in the second sliding channel (23), and the sliding block (2) moves to control the on-off of one group of the pressure channels (17), and the other group of the pressure channels (17) is correspondingly provided with a valve core (22), the valve core (22) is provided with a switch to control the on-off of the corresponding pressure channel (17), and the valve body (1) is provided with a control assembly which can push or release the switch of the valve core (22) and control the movement of the sliding block (2).

3. A resealable container valve according to claim 2, wherein: The sliding block (2) is used to control the on-off of the pressure channel (17) for pressure supplement, the sliding block (2) is provided with a connecting channel (21) for communicating the pressure chamber (15) and the pressure channel (17) for pressure relief, and the valve core (22) is arranged in the connecting channel (21).

4. A resealable container valve according to claim 3, wherein: The control assembly includes a second elastic member (31) arranged in the second sliding channel (23), which is used to push the sliding block (2) to make the pressure channel (17) for pressure supplement tend to communicate with the pressure chamber (15), and the valve body (1) is provided with a pushing unit (4) for pushing the sliding block (2) and the valve core (22), which can push the sliding block (2) to move, so that the pressure channel (17) for pressure supplement tends to be cut off from the pressure chamber (15), and press the switch of the valve core (22).

5. A resealable container valve according to claim 4, wherein: The pushing unit (4) is a first electromagnet (41), and the moving part of the first electromagnet (41) extends into the valve body (1) and is used to push the sliding block (2) at the same time to press or release the switch of the valve core (22).

6. A resealable container valve according to claim 3, wherein: The valve core (14) moves to connect the inlet (11) and the outlet (12) in the compressed state of the pressure cavity (15); the valve core (14) moves to cut off the inlet (11) and the outlet (12) in the expanded state of the pressure cavity (15).

7. A resealable container valve according to claim 1 wherein: The control device comprises a moving seat (5), the valve body (1) is provided with a third sliding channel (51) communicated with the pressure cavity (15), the pressure channel (17) for pressure compensation and the pressure channel (17) for pressure relief are both communicated with the third sliding channel (51), the moving seat (5) is slidably arranged in the third sliding channel (51), the moving seat (5) is provided with an inner cavity (52), one end of the inner cavity (52) is open to the pressure cavity (15) and is communicated with each other, a through slot (53) communicated with the inner cavity (52) is formed in the peripheral wall of the moving seat (5), the moving of the moving seat (5) can make the through slot (53) communicated with the pressure channel (17) for pressure compensation or the pressure channel (17) for pressure relief, the valve body (1) is provided with a driving unit (6) for controlling the movement of the moving seat (5).

8. A resealable container valve according to claim 7, wherein: The driving unit (6) comprises a second electromagnet (61), the moving part of the second electromagnet (61) extends into the valve body (1) and can push the moving seat (5), so that the inner cavity (52) of the moving seat (5) tends to be communicated with the pressure channel (17) for pressure relief, the third sliding channel (51) is provided with a third elastic member (62), the third elastic member (62) is used for pushing the moving seat (5), so that the inner cavity (52) of the moving seat (5) tends to be communicated with the pressure channel (17) for pressure compensation.

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