Valve capable of inching for multiple times

Abstract

The invention relates to the technical field of valves, in particular to a valve capable of inching for multiple times. The valve capable of inching for multiple times comprises a valve body, the valve body is provided with an outlet and at least one inlet, each inlet is communicated with the outlet through a first connecting channel, and the inlets are used for being communicated with external equipment; the driving device is arranged on the valve body; the pushing device is movably arranged in the valve body, and the driving device is connected with the pushing device; the piston device is movably arranged in the valve body, and the piston device is located below the pushing device; the driving device is used for driving the pushing device to move up and down so as to drive the piston device to move up and down to open or block the first connecting channel. The vertical circulating movement of the pushing device and the piston device can be controlled by the driving device, so that the valve in the scheme can be opened and closed for multiple times, and the spraying time and the spraying interval of a fire extinguishing agent in a fire-fighting steel cylinder or other high-pressure fire-fighting connectors can be accurately controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and specifically to a valve that can be actuated multiple times. Background Art

[0002] As a key component of an automated fire protection system, solenoid valves are widely used in various fire protection equipment. Currently, the activation method of the container valve of a gas fire extinguishing device mainly relies on an electromagnet to pierce a puncture needle through a working diaphragm for activation. When a fire breaks out, the fire alarm controller outputs an activation signal, and the electromagnet inside the electromagnetic actuator attracts, causing the puncture needle to move downward to pierce the working diaphragm of the container valve. The pressure chamber above the valve piston is connected to the external atmosphere, the pressure chamber is depressurized, and the valve piston moves under the push of the internal gas pressure of the gas cylinder, thereby opening the container valve. The fire extinguishing agent in the fire extinguishing agent bottle is pressed out of the container valve outlet by the pressurized gas, and the fire extinguishing agent is discharged.

[0003] However, the above-mentioned gas container valves have the following deficiencies: 1. Only single - time activation: The existing container valves can only be activated once. Once the working diaphragm is pierced, the valve is in an open state, and the discharge process of the fire extinguishing agent cannot be interrupted. 2. Lack of controllability: During the discharge process, it is impossible to accurately control the discharge time and discharge interval of the fire extinguishing agent, which cannot meet the requirements for the fire suppression performance of battery fires (for the lithium - battery fire suppression test, it is very difficult to extinguish the fire by discharging the fire extinguishing agent only once because the battery is still reacting internally and will reignite after a period of time. Therefore, it is necessary to be able to discharge the fire extinguishing agent continuously at intervals to continuously suppress the rise of the battery temperature). Summary of the Invention

[0004] The purpose of the present invention is to provide a valve that can be actuated multiple times, aiming to solve the technical problems that the existing gas container valves can only be activated once and cannot accurately control the discharge time and discharge interval of the fire extinguishing agent.

[0005] To achieve the above - mentioned purpose, the present invention provides a valve that can be actuated multiple times, including a valve body, which is provided with an outlet and at least one inlet. Each of the inlets is connected to the outlet through a first connection channel, and the inlet is used to communicate with external equipment;

[0006] A driving device, which is arranged on the valve body;

[0007] A pushing device, which is movably arranged inside the valve body, and the driving device is connected to the pushing device;

[0008] A piston device, which is movably arranged inside the valve body, and the piston device is located below the pushing device; the driving device is used to drive the pushing device to move up and down, thereby driving the piston device to move up and down to open or block the first connection channel.

[0009] Preferably, the pushing device includes a pushing component and a movable component, and the pushing component is located above the movable component;

[0010] The driving device includes a driving member, a first mounting seat and a second mounting seat. The pushing component is connected to the driving member. The first mounting seat is provided at the lower end of the driving member. An first mounting groove is provided inside the top end of the second mounting seat. The bottom end of the first mounting seat is inserted into the first mounting groove, and the bottom end of the second mounting seat is inserted into the valve body;

[0011] A through first moving channel is provided in the first mounting seat. The pushing component is movably arranged in the first moving channel. A second moving channel is provided in the second mounting seat. The movable component is arranged in the second moving channel. A third moving channel is provided in the valve body. The piston device is movably arranged in the third moving channel. There is a first cavity between the bottom end of the first mounting seat and the bottom end of the first mounting groove. There is a second cavity between the bottom end of the second mounting seat and the top end of the piston device. A second connecting channel and a fourth connecting channel are also provided in the second mounting seat. The second connecting channel connects the first cavity and the second cavity. A third connecting channel is also provided in the valve body. The inlet, the third connecting channel, the fourth connecting channel and the second moving channel are connected and communicated. The first mounting seat is also provided with a first pressure relief channel communicating with the outside. The first pressure relief channel is connected and communicated with the first moving channel. The valve body is provided with a second pressure relief channel communicating with the outside. The second pressure relief channel is connected and communicated with the third moving channel, so that:

[0012] When the driving member drives the pushing component to move downward, the pushing component blocks the first moving channel, and the pushing component pushes the movable component downward, so that the movable component is in an open state. The gas flows along the first path from the inlet to the third connecting channel, the fourth connecting channel, the second moving channel, the first cavity, the second connecting channel and the second cavity in sequence and presses the piston device downward, so that the piston device no longer blocks the first connecting channel, so that the fluid flows along the second path from the inlet to the first connecting channel and the outlet in sequence;

[0013] When the driving member is released, the pushing component moves upward. The pushing component no longer blocks the first moving channel. At the same time, the pushing component no longer pushes the movable component downward. The movable component moves upward to a closed state to block the second moving channel. The gas flows along the third path from the second cavity, the second connecting channel, the first cavity, the first moving channel and the first pressure relief channel to the outside, so that the piston device moves upward and blocks the first connecting channel.

[0014] Preferably, the pushing component includes a thimble and a first elastic member. A second installation groove is further provided in the first mounting seat. The thimble is movably arranged in the first moving channel, and the upper end of the thimble is connected to the driving member. The outer wall of the thimble is sleeved with the first elastic member, and the bottom end of the first elastic member abuts against the second installation groove, so that:

[0015] When the driving member drives the thimble to move downward, the first elastic member is in a compressed state, the thimble blocks the first moving channel, and the bottom end of the thimble extends out of the first moving channel and pushes the moving component downward;

[0016] When the driving member is released, the first elastic member is in an extended state to drive the thimble to move upward. The thimble no longer blocks the first moving channel, and at the same time, the thimble is separated from the moving component.

[0017] Preferably, a first sealing ring for sealing the first moving channel is further sleeved on the thimble.

[0018] Preferably, the moving component includes a mounting member and a moving rod. The mounting member is arranged in the second moving channel. A through fourth moving channel is formed in the mounting member. The moving rod is movably inserted into the fourth moving channel, so that:

[0019] When the pushing device pushes the moving rod downward, the moving rod moves downward along the fourth moving channel, so that the bottom end of the moving rod does not block the fourth moving channel. At this time, the bottom end of the second moving channel is communicated with the first cavity through the fourth moving channel;

[0020] When the pushing component moves upward and no longer pushes the moving rod downward, the gas flows from the inlet along the fourth path to the third connecting channel, the fourth connecting channel, the bottom end of the second moving channel and squeezes the moving rod upward, so that the moving rod moves upward to block the fourth moving channel, and the bottom end of the second moving channel is no longer communicated with the first cavity.

[0021] Preferably, a second sealing ring is sleeved on the outer wall of the middle part of the mounting member. The second sealing ring is used to prevent the bottom end of the second moving channel from communicating with its top end.

[0022] Preferably, the piston device includes a piston rod, a second elastic member, and a flow guide member. A third installation groove is provided in the valve body. The piston rod is movably arranged in the third moving channel. The outer wall of the top end of the piston rod is sleeved with the second elastic member. The bottom end of the second elastic member abuts against the bottom end of the third installation groove. The piston rod sequentially passes through the third moving channel and the first connection channel, and the bottom end of the piston rod extends to the lower end of the first connection channel. The end of the piston rod is inserted into the flow guide member. A third sealing ring is further sleeved on the outer wall of the top end of the flow guide member, so that:

[0023] When the gas in the second cavity presses the piston rod downward, the second elastic member is in a compressed state, and the piston rod, the flow guide member, and the third sealing ring move downward synchronously. The third sealing ring no longer blocks the first connection channel, so that the fluid flows from the inlet to the outlet along the second path;

[0024] When the gas flows to the outside along the third path, the second elastic member is in an extended state to drive the piston rod, the flow guide member, and the third sealing ring to move upward synchronously, and the third sealing ring blocks the first connection channel.

[0025] Preferably, a fourth sealing ring is provided at the top end of the piston rod, and the fourth sealing ring is used to prevent the second cavity from communicating with the third installation groove;

[0026] A fifth sealing ring is provided in the valve body, and the fifth sealing ring is fitted on the outer wall of the piston rod. The fifth sealing ring is used to prevent the third moving channel from communicating with the third installation groove.

[0027] Preferably, a plurality of sixth sealing rings are provided at one end of the second mounting seat inserted into the valve body.

[0028] Preferably, the driving member is an electromagnet.

[0029] The valve that can be jogged multiple times disclosed by the present invention has the following beneficial effects: Driven by the driving device, the pushing device can move up and down repeatedly, thereby driving the piston device to move up and down, realizing the connection and closing between the inlet and the outlet of the valve body. Since the pushing device and the piston device can reciprocate under the control of the driving device, there is no situation in the prior art that the working diaphragm of the container valve cannot be restarted after being punctured. The valve of this solution can be opened and closed multiple times. Moreover, the driving device directly acts on the pushing device, and the control precision of the pushing device and the piston device is relatively high. The spraying time and spraying interval of the fire extinguishing agent in the fire fighting steel cylinder or other high-pressure fire fighting interfaces can be accurately controlled, which is applicable to most high-pressure fire fighting solenoid valve scenarios, with low cost and good structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0031] Figure 1 Schematic structural diagram of the first embodiment of the valve that can be actuated multiple times according to the present invention;

[0032] Figure 2 Schematic structural diagram of the second embodiment of the valve that can be actuated multiple times according to the present invention;

[0033] Figure 3 Schematic structural diagram of the second embodiment of the valve that can be actuated multiple times according to the present invention from another angle;

[0034] Figure 4 Schematic cross-sectional structural diagram of the valve that can be actuated multiple times according to the present invention;

[0035] Figure 5 For Figure 4 Partial enlarged schematic diagram at position A in

[0036] Figure 6 For Figure 4 Partial enlarged schematic diagram at position B in

[0037] Figure 7 Schematic structural diagram of the valve that can be actuated multiple times according to the present invention during the "opening process";

[0038] Figure 8 Schematic structural diagram of the valve that can be actuated multiple times according to the present invention during the "opening process";

[0039] Figure 9 Schematic structural diagram of the valve that can be actuated multiple times according to the present invention during the "closing process".

[0040] In the attached drawings: 1 - valve body, 11 - outlet, 12 - inlet, 13 - first connection channel, 14 - third movable channel, 15 - third connection channel, 16 - second pressure relief channel, 17 - third mounting groove, 2 - driving device, 21 - driving member, 22 - first mounting seat, 221 - first movable channel, 222 - first pressure relief channel, 223 - second mounting groove, 23 - second mounting seat, 231 - first mounting groove, 232 - second movable channel, 233 - second connection channel, 234 - fourth connection channel, 235 - sixth sealing ring, 3 - pushing device, 31 - pushing assembly, 311 - ejector pin, 312 - first elastic member, 313 - first sealing ring, 32 - movable assembly, 321 - mounting member, 3211 - fourth movable channel, 322 - movable rod, 323 - second sealing ring, 4 - piston device, 41 - piston rod, 42 - second elastic member, 43 - flow guiding member, 44 - third sealing ring, 45 - fourth sealing ring, 46 - fifth sealing ring, 5 - first cavity, 6 - second cavity.

[0041] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the attached drawings. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the attached drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] It should be noted that if there are directional indications involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture. If this specific posture changes, the directional indications will also change accordingly.

[0044] In addition, if there are descriptions such as "first" and "second" involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0045] Such as Figures 1 to 9As shown in the figure, a valve that can be actuated multiple times includes a valve body 1, which is provided with an outlet 11 and at least one inlet 12. Each of the inlets 12 is connected to the outlet 11 through a first connection channel 13, and the inlet 12 is used to communicate with external equipment.

[0046] A driving device 2, which is arranged on the valve body 1;

[0047] A pushing device 3, which is movably arranged in the valve body 1, and the driving device 2 is connected to the pushing device 3;

[0048] A piston device 4, which is movably arranged in the valve body 1, and the piston device 4 is located below the pushing device 3; the driving device 2 is used to drive the pushing device 3 to move up and down, so as to drive the piston device 4 to move up and down to open or block the first connection channel 13.

[0049] The valve body 1 of this solution is mainly used to be connected to a fire fighting steel cylinder or other high-pressure fire fighting interfaces. Specifically, it includes a driving device 2, a pushing device 3 and a piston device 4. The pushing device 3 moves up and down under the drive of the driving device 2, so as to drive the piston device 4 to move up and down, realizing the connection and closure between the inlet 12 and the outlet 11 of the valve body 1. Since the up and down cyclic movement of the pushing device 3 and the piston device 4 can be controlled by the driving device 2, there is no situation in the prior art that the working diaphragm of the container valve cannot be restarted after being punctured, and the valve can be opened and closed multiple times. And the driving device 2 directly acts on the pushing device 3, with high control precision for the pushing device 3 and the piston device 4, and can accurately control the spraying time and spraying interval of the fire extinguishing agent in the fire fighting steel cylinder or other high-pressure fire fighting interfaces, which is applicable to most high-pressure fire fighting solenoid valve scenarios, with low cost and good structural stability.

[0050] Furthermore, as Figures 4 to 9 shown in the figure, the pushing device 3 includes a pushing component 31 and a movable component 32, and the pushing component 31 is located above the movable component 32;

[0051] The driving device 2 includes a driving part 21, a first mounting seat 22 and a second mounting seat 23. The pushing component 31 is connected to the driving part 21. The lower end of the driving part 21 is provided with the first mounting seat 22. The inside of the top end of the second mounting seat 23 is provided with a first mounting groove 231, and the bottom end of the first mounting seat 22 is inserted into the first mounting groove 231, and the bottom end of the second mounting seat 23 is inserted into the valve body 1;

[0052] A through first moving channel 221 is provided in the first mounting seat 22. The pushing component 31 is movably arranged in the first moving channel 221. A second moving channel 232 is provided in the second mounting seat 23. The moving component 32 is arranged in the second moving channel 232. A third moving channel 14 is provided in the valve body 1. The piston device 4 is movably arranged in the third moving channel 14. There is a first cavity 5 between the bottom end of the first mounting seat 22 and the bottom end of the first mounting groove 231. There is a second cavity 6 between the bottom end of the second mounting seat 23 and the top end of the piston device 4. A second connecting channel 233 and a fourth connecting channel 234 are further provided in the second mounting seat 23. The second connecting channel 233 communicates the first cavity 5 and the second cavity 6. A third connecting channel 15 is further provided in the valve body 1. The inlet 12, the third connecting channel 15, the fourth connecting channel 234 and the second moving channel 232 are connected and communicated. The first mounting seat 22 is further provided with a first pressure relief channel 222 communicating with the outside. The first pressure relief channel 222 is connected and communicated with the first moving channel 221. The valve body 1 is provided with a second pressure relief channel 16 communicating with the outside. The second pressure relief channel 16 is connected and communicated with the third moving channel 14, so that:

[0053] When the driving member 21 drives the pushing component 31 to move downward, the pushing component 31 blocks the first moving channel 221, and the pushing component 31 pushes the moving component 32 downward, so that the moving component 32 is in an open state. The gas flows along the first path from the inlet 12 to the third connecting channel 15, the fourth connecting channel 234, the second moving channel 232, the first cavity 5, the second connecting channel 233 and the second cavity 6 in sequence and presses the piston device 4 downward, so that the piston device 4 no longer blocks the first connecting channel 13, and thus the fluid flows along the second path from the inlet 12 to the first connecting channel 13 and the outlet 11 in sequence;

[0054] When the driving member 21 is released, the pushing component 31 moves upward. The pushing component 31 no longer blocks the first moving channel 221. At the same time, the pushing component 31 no longer pushes the moving component 32 downward. The moving component 32 moves upward to a closed state to block the second moving channel 232. The gas flows along the third path from the second cavity 6, the second connecting channel 233, the first cavity 5, the first moving channel 221 and the first pressure relief channel 222 to the outside, so that the piston device 4 moves upward and blocks the first connecting channel 13.

[0055] In this embodiment, the pushing device 3 is mainly composed of a pushing component 31 and a movable component 32 arranged up and down. Moreover, the sizes of the pushing component 31 and the movable component 32 are small, much smaller than the diameter of the valve body 1. Even under very high pressure, it is easy for the two to move driven by the driving device 2. A solenoid valve with a small size can push a pushing device 3 with a small size, and then use the pressure in the valve to drive the larger piston device 4 to open and close, with high efficiency and fast opening and closing speeds.

[0056] When the valve body 1 is in the open state: Since there is a first cavity between the first mounting seat 22 where the pushing component 31 is located and the second mounting seat 23 where the movable component 32 is located, when the driving member 21 is connected to an electrical signal and starts, the driving member 21 drives the pushing component 31 to move downward, so that the first movable channel 221 above the first cavity is sealed; the lower end of the pushing component 31 abuts against the movable component 32 to make it in the open state. At this time, the first cavity 5 is communicated with an external fire extinguisher cylinder or other high-pressure fire-fighting interfaces. High-pressure gas / liquid / foam, etc. flow along the first path from the inlet 12 to the third connection channel 15, the fourth connection channel 234, the second movable channel 232, the first cavity 5, the second connection channel 233, and the second cavity 6 in sequence, so that the internal pressure of the second cavity 6 rises. Under the action of the pressure, the piston device 4 moves downward and no longer blocks the first connection channel 13, and the inlet 12 is communicated with the outlet 11. The fluid (fire-fighting high-pressure gas / liquid / foam, etc.) flows along the second path from the inlet 12 to the first connection channel 13 and the outlet 11 in sequence to complete fire extinguishing.

[0057] When it is necessary to close the valve body 1, the driving member 21 no longer drives the pushing component 31 to move downward (the driving member 21 can also be directly released when it is released. For example, when an electromagnet is used as the driving member 21, the thrust of the electromagnet disappears when the electromagnet is powered off). The pushing component 31 rises under the pressure action at the first cavity 5 (this can also include the stretching force of the following first elastic member 312), so that the pushing component 31 no longer blocks the first movable channel 221. The gas flows along the third path from the second cavity 6, the second connection channel 233, the first cavity 5, the first movable channel 221, and the first pressure relief channel 222 to the outside to achieve pressure relief. The pressures of the first cavity 5 and the second cavity 6 drop rapidly. At this time, the movable component 32 is also in the closed state, and the pressures in the first cavity 5 / second cavity 6 are the same as the external pressure. The piston device 4 moves upward under the high pressure at the lower inlet 12, so that the entire valve body 1 is closed.

[0058] Furthermore, the pushing component 31 includes a thimble 311 and a first elastic member 312. A second installation groove 223 is further provided in the first mounting seat 22. The thimble 311 is movably arranged in the first moving channel 221, and the upper end of the thimble 311 is connected to the driving member 21. The outer wall of the thimble 311 is sleeved with the first elastic member 312, and the bottom end of the first elastic member 312 abuts against the second installation groove 223, such that:

[0059] When the driving member 21 drives the thimble 311 to move downward, the first elastic member 312 is in a compressed state, the thimble 311 blocks the first moving channel 221, and the bottom end of the thimble 311 extends out of the first moving channel 221 and pushes the moving component 32 downward.

[0060] When the driving member 21 is released, the first elastic member 312 is in an extended state to drive the thimble 311 to move upward, the thimble 311 no longer blocks the first moving channel 221, and at the same time the thimble 311 is separated from the moving component 32.

[0061] In this embodiment, the up and down movement of the thimble 311 is driven by the driving member 21. When the driving member 21 drives the thimble 311 to move downward, the first elastic member 312 in the second installation groove 223 is in a compressed state. The thimble 311 moves downward to block the first moving channel 221, and the bottom end of the thimble 311 extends out of the first moving channel 221 and pushes the moving component 32 downward. When the driving member 21 is released, the first elastic member 312 extends upward and drives the thimble 311 to move upward, so that the thimble 311 no longer blocks the first moving channel 221. At this time, the thimble 311 retracts into the first moving channel 221, and the thimble 311 is separated from the moving component 32 and no longer pushes the moving component 32 downward.

[0062] Furthermore, a first sealing ring 313 for sealing the first moving channel 221 is further sleeved on the thimble 311. In this embodiment, in order to make the sealing degree between the first moving channel 221 and the first cavity 5 better in the blocking state, a first sealing ring 313 is further sleeved on the thimble 311. Usually, a receiving groove is further provided in the first mounting seat 22. The receiving groove is located below the second installation groove 223. The middle part of the thimble 311 is located in the receiving groove, and the diameter of the middle section of the thimble 311 is larger than the diameter of the bottom end. Therefore, when blocking, the thimble 311 presses tightly on the plane at the bottom end of the receiving groove to achieve sealing. The first sealing ring 313 is preferably arranged at the bottom end of the middle section of the thimble 311, and the sealing effect is better.

[0063] Further, the movable component 32 includes a mounting member 321 and a movable rod 322. The mounting member 321 is disposed in the second movable channel 232. A through fourth movable channel 3211 is formed in the mounting member 321. The movable rod 322 is movably inserted into the fourth movable channel 3211, such that:

[0064] When the pushing device 3 pushes down the movable rod 322, the movable rod 322 moves downward along the fourth movable channel 3211, so that the bottom end of the movable rod 322 does not block the fourth movable channel 3211. At this time, the bottom end of the second movable channel 232 is connected to the first cavity 5 through the fourth movable channel 3211;

[0065] When the pushing assembly 31 moves upward and no longer pushes down the movable rod 322, gas flows along the fourth path from the inlet 12 to the third connection channel 15, the fourth connection channel 234, the bottom end of the second movable channel 232 and upwardly presses the movable rod 322, so that the movable rod 322 moves upward to block the fourth movable channel 3211, and the bottom end of the second movable channel 232 is no longer communicated with the first cavity 5.

[0066] The movable component 32 with the above structure is one embodiment of this solution, specifically including a mounting member 321 and a movable rod 322. When the pushing device 3 pushes down the movable rod 322, the movable rod 322 inserted in the mounting member 321 moves downward along the fourth movable channel 3211, so that the bottom end of the movable rod 322 does not block the fourth movable channel 3211. At this time, the bottom end of the second movable channel 232 is connected to the first cavity 5 through the fourth movable channel 3211, and gas can flow from the bottom end of the second movable channel 232 into the first cavity 5. When the pushing assembly 31 moves upward, the movable rod 322 no longer receives the downward acting force of the pushing assembly 31. The high-pressure gas flows along the fourth path from the inlet 12 to the third connection channel 15, the fourth connection channel 234, the bottom end of the second movable channel 232 and upwardly presses the movable rod 322. The movable rod 322 moves upward under the action of the pressure until it blocks the fourth movable channel 3211. At this time, the bottom end of the second movable channel 232 is no longer communicated with the first cavity 5. In addition, in order to achieve a better sealing effect, a sealing ring can also be provided at the bottom end of the movable rod 322.

[0067] In other embodiments, the movable component 32 can also be similar to the pushing assembly 31, and only a movable rod 322 (without a mounting member 321) that can seal the second movable channel 232 is provided, and the elastic member is compressed and stretched to realize the action of blocking or opening the second movable channel 232.

[0068] Figure 4The inlet on the left side of the middle valve body 1 is usually blocked by installing a pressure gauge. During filling, the pressurized gas is also injected into the fire extinguisher cylinder through this inlet. After filling, the installed pressure gauge is used to monitor the internal pressure value of the fire extinguisher cylinder.

[0069] Further, a second sealing ring 323 is sleeved on the outer wall of the middle part of the mounting member 321. The second sealing ring 323 is used to prevent the bottom end of the second moving channel 232 from communicating with its top end. In this embodiment, the inner diameter of the second moving channel 232 is basically the same as the outer diameter of the mounting member 321, having a certain sealing effect. However, in order to make the sealing performance between the bottom end and the top end of the second moving channel 232 / the first cavity 5 better, a second sealing ring 323 is sleeved on the outer wall of the mounting member 321. The second sealing ring 323 completely fits the inner wall of the second mounting seat 23 where the second moving channel 232 is provided, and basically can avoid the situation that the first cavity 5 communicates with the second moving channel 232 when the moving assembly 32 is in the closed state, achieving a better sealing effect.

[0070] Further, the piston device 4 includes a piston rod 41, a second elastic member 42 and a flow guiding member 43. A third mounting groove 17 is provided in the valve body 1. The piston rod 41 is movably arranged in the third moving channel 14. A second elastic member 42 is sleeved on the outer wall of the top end of the piston rod 41. The bottom end of the second elastic member 42 abuts against the bottom end of the third mounting groove 17. The piston rod 41 sequentially passes through the third moving channel 14 and the first connecting channel 13, and the bottom end of the piston rod 41 extends to the lower end of the first connecting channel 13. The end of the piston rod 41 is inserted on the flow guiding member 43. A third sealing ring 44 is also sleeved on the outer wall of the top end of the flow guiding member 43, so that:

[0071] When the gas in the second cavity 6 presses the piston rod 41 downward, the second elastic member 42 is in a compressed state. The piston rod 41, the flow guiding member 43 and the third sealing ring 44 move downward synchronously. The third sealing ring 44 no longer blocks the first connecting channel 13, so that the fluid flows from the inlet 12 to the outlet 11 along the second path;

[0072] When the gas flows to the outside along the third path, the second elastic member 42 is in an extended state to drive the piston rod 41, the flow guiding member 43 and the third sealing ring 44 to move upward synchronously. The third sealing ring 44 blocks the first connecting channel 13.

[0073] In this embodiment, the top end of the piston rod 41 is located in the third mounting groove 17, and the top end of the piston rod 41 is also sleeved with a second elastic member 42 (specifically a spring), the middle part of the piston rod 41 is inserted in the third active channel 14, and the bottom end of the piston rod 41 extends to the lower end of the first connecting channel 13. When the gas in the second cavity 6 squeezes the piston rod 41 downward, the second elastic member 42 in the third mounting groove 17 is compressed, the piston rod 41, the guide member 43 and the third sealing ring 44 move downward synchronously, and the third sealing ring 44 at the bottom end of the piston rod 41 will no longer block the first connecting channel 13, and the fluid (fire extinguishing agent) flows from the inlet 12 through the first connecting channel 13 along the second path and then flows to the outlet 11; when the gas is discharged from the first pressure relief channel 222 to the outside along the third path, the top end of the piston rod 41 is no longer supported by the air pressure, and the second elastic member 42 extends upward and drives the piston rod 41, the guide member 43 and the third sealing ring 44 to move upward at the same time, and the third sealing ring 44 at the bottom end of the piston rod 41 blocks the first connecting channel 13 again, so that the inlet 12 and the outlet 11 are not connected to each other.

[0074] In addition, the upper end of the third sealing ring 44 is truncated cone-shaped (the inner diameter gradually decreases from bottom to top), and correspondingly, the inner diameter of the bottom end of the first connecting channel 13 gradually decreases from bottom to top. In this way, the third sealing ring 44 can better seal the bottom end of the first connecting channel 13.

[0075] The guide member 43 can be a guide nut during actual installation, which has two functions: one is the process requirement for the installation of the piston device 4. The piston rod 41 is inserted into the valve body 1 from top to bottom, and the guide nut is locked from the bottom with a hexagonal sleeve to complete the installation of the piston device 4; the second is the diversion function. The guide nut guides the fluid from the outside of the guide nut to the first connecting channel 13 and then to the outlet 11 for discharge. When the fluid passes through the guide nut, it is necessary to try not to cause too much turbulence to avoid increasing resistance. Therefore, the design of this nut should be as smooth as possible. Finally, the guide nut here also mainly plays the role of pressing the third sealing ring 44.

[0076] Furthermore, a fourth sealing ring 45 is provided at the top end of the piston rod 41, and the fourth sealing ring 45 is used to prevent the second cavity 6 from being connected to the third mounting groove 17;

[0077] A fifth sealing ring 46 is disposed in the valve body 1 . The fifth sealing ring 46 is fitted on the outer wall of the piston rod 41 . The fifth sealing ring 46 is used to prevent the third movable channel 14 from being connected to the third mounting groove 17 .

[0078] In this embodiment, the top end of the piston rod 41 is disposed closely against the inner wall of the valve body 1, having a certain sealing effect. However, in order to maintain good sealing performance between the second cavity 6 and the third installation groove 17 after long-term use of the valve, a fourth sealing ring 45 is installed at the top end of the piston rod 41. The fourth sealing ring 45 completely fits against the inner wall of the valve body 1, further preventing the second cavity 6 from communicating with the third installation groove 17 and ensuring the normal operation of the valve body 1.

[0079] Similarly, the middle part of the piston rod 41 in the third moving channel 14 is also disposed closely against the inner wall of the valve body 1 (here, the middle part of the piston rod 41 does not refer to the absolute midpoint position of the piston rod 41, but the position where the piston rod 41 is inserted into the third moving channel 14), having a certain sealing effect. However, in order to have long-term stable sealing performance between the third moving channel 14 and the third installation groove 17, a fifth sealing ring 46 is installed in the middle part of the piston rod 41. The fifth sealing ring 46 further prevents the third moving channel 14 from communicating with the third installation groove 17 and ensures the normal operation of the valve body 1.

[0080] Generally, the second pressure relief channel 16 communicates with the third installation groove 17. The settings of the third sealing ring 44 and the fourth sealing ring 45 ensure that the internal space of the third installation groove 17 is completely independent, ensuring a good pressure relief effect.

[0081] Further, a plurality of sixth sealing rings 235 are provided at one end of the second mounting seat 23 inserted into the valve body 1. The second mounting seat 23 is directly inserted into the valve body 1 for fixation. In order to make the sealing performance between the second mounting seat 23 and the valve body 1 better, a plurality of sixth sealing rings 235 are provided at the bottom end of the second mounting seat 23 to prevent the gas inside the second mounting seat 23 and the valve body 1 from leaking out from the insertion part of the second mounting seat 23, and the sealing performance is better. During actual production, two to three sixth sealing rings 235 can be provided at the bottom end of the second mounting seat 23 from top to bottom.

[0082] Further, the driving member 21 is an electromagnet. The electromagnet, as the driving member 21, can quickly generate a magnetic field after being energized, has a large control torque, and has the characteristic of fast response. The magnetic force of the electromagnet can be precisely controlled by the current in the coil, thereby realizing precise mechanical control or electrical control. It can preferably achieve multiple jogging of the valve, and can also accurately control the spraying time and spraying interval of the fire extinguishing agent.

[0083] Valve design calculation description of this solution:

[0084] 1. Electromagnet: QDQ75N, driving working temperature: 0°C - 50°C, working voltage: 24V 1.5A, driving force: 75N.

[0085] 2. (External device) Fire extinguishing agent container: A stainless-steel welded gas cylinder with a volume of 3L; the fire extinguishing agent (fluid) is perfluorohexanone fire extinguishing agent, and the filling amount of the fire extinguishing agent is 3kg; the pressurizing gas is N2, and the storage pressure is 1.6MPa.

[0086] First, check the opening force of the piston rod 41 of the valve body 1 when the fire extinguishing agent is initially discharged:

[0087] 1. The sealing area of the internal ejector pin 311 when the electromagnet is pressed down is: 12.57mm 2 , and the upward air pressure thrust it receives is: 20.1N < 75N. The electromagnet drives the ejector pin 311 to move downward, and the sealing ring at the lower end of the ejector pin 311 seals the first moving channel 221 to complete the sealing.

[0088] 2. The specific design parameters of the second elastic member 42 (cylindrical compression spring) of the ejector pin 311 are as follows: the helix direction is right-handed; the total number of turns is 4.5 turns; the effective number of turns is 3 turns; the end type is Y-type with both ends coiled and tightened, and each end is ground for 3 / 4 turn; this spring is manufactured with reference to the GB / T1239.6-class spring; the surface is chrome-plated.

[0089] 3. The pressure-receiving area S1 of the upper part of the piston rod 41 from the pressure chamber (the second cavity 6) is 615mm 2 , and the pressure-receiving area S2 of the lower part of the piston rod 41's diversion part is 201mm 2 , the difference in pressure-receiving area △S is 414mm 2 , the downward gas pressure received by the piston rod 41 is 662N, which is much greater than the maximum working load of the compression spring (the second elastic member 42) of 60N. The piston rod 41 moves downward and the valve body 1 completes the opening action. Note: The sealing ring at the piston rod 41 is well lubricated and the dynamic friction force received is small and can be ignored.

[0090] 4. The specific design parameters of the first elastic member 312 (cylindrical compression spring) of the ejector pin 311 are as follows: the minimum working load P1 is 2N; the maximum working load P n is 15N; the working stroke h is 6.05mm; the maximum spring outer diameter D2max is 8mm; the spring category is type III load (N < 10000); the end structure is that the ends are not coiled and ground flat, and the support ring is 0.75 turn.

[0091] 5. When the electromagnet loses driving force, the ejector pin 311 moves upward under the elastic force of the first elastic member 312 and the air pressure. The sealing ring at the lower end leaves the sealing plane at the bottom of the accommodating groove. The second cavity 6 above the piston rod 41 is connected to the external air through the second pressure relief channel 16 to complete exhaust and pressure relief. The piston rod 41 moves upward under the upward gas pressure and the elastic force of the second elastic member 42, and the third sealing ring 44 seals to complete the closing action of the valve body 1.

[0092] Then, check the opening force of the piston rod 41 when all the fire extinguishing agents are ejected from the valve body 1:

[0093] According to Boyle's law: P1V1 = P2V2, the density of perfluorocyclohexanone liquid is 1617.2 kg / m at 20 °C 3 , and the pressure P2 in the gas cylinder at the gas state point is 0.6 MPa.

[0094] 1. The pressure-bearing area S1 of the upper part of the piston rod 41 from the second cavity 6 is 615 mm 2 , the pressure-bearing area S2 of the lower part of the piston by the flow guide nut is 201 mm 2 , and the pressure-bearing area difference △S is 414 mm 2 . At this time, the downward gas pressure on the piston rod 41 is 248 N, which is greater than the maximum working load 60 N of the second elastic member 42. The piston rod 41 can still move downward stably to complete the opening action of the valve body 1.

[0095] In summary: The valve of this solution that can be actuated multiple times can meet the normal opening and closing actions of the valve during the entire process of fire extinguishing agent ejection.

[0096] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A valve that can be operated multiple times, characterized in that: include: A valve body (1) is provided with an outlet (11) and at least one inlet (12), each of the inlets (12) being connected to the outlet (11) via a first connecting channel (13), and the inlet (12) is used to communicate with external equipment; A driving device (2) disposed on the valve body (1); A push-up device (3) is movably arranged in the valve body (1), and the driving device (2) is connected to the push-up device (3); A piston device (4) is movably arranged in the valve body (1), and the piston device (4) is located below the ejection device (3); the driving device (2) is used to drive the ejection device (3) to move up and down, thereby driving the piston device (4) to move up and down, so as to open or block the first connecting channel (13).

2. A valve capable of multiple inching according to claim 1, characterized in that: The ejection device (3) comprises an ejection assembly (31) and a movable assembly (32), wherein the ejection assembly (31) is located above the movable assembly (32); The driving device (2) comprises a driving member (21), a first mounting seat (22) and a second mounting seat (23); the ejection assembly (31) is connected to the driving member (21); the first mounting seat (22) is provided at the lower end of the driving member (21); a first mounting groove (231) is provided inside the top end of the second mounting seat (23); the bottom end of the first mounting seat (22) is inserted into the first mounting groove (231); and the bottom end of the second mounting seat (23) is inserted into the valve body (1); A first movable channel (221) is provided in the first mounting seat (22), the push-out assembly (31) is movably arranged in the first movable channel (221), a second movable channel (232) is provided in the second mounting seat (23), the movable assembly (32) is arranged in the second movable channel (232), a third movable channel (14) is provided in the valve body (1), and the piston device (4) is movably arranged in the third movable channel (14); a first cavity (5) is provided between the bottom end of the first mounting seat (22) and the bottom end of the first mounting groove (231), a second cavity (6) is provided between the bottom end of the second mounting seat (23) and the top end of the piston device (4), and the second mounting seat (23) is also provided with a A second connecting channel (233) and a fourth connecting channel (234) are provided, the second connecting channel (233) being in communication with the first cavity (5) and the second cavity (6), a third connecting channel (15) is further provided in the valve body (1), the inlet (12), the third connecting channel (15), the fourth connecting channel (234) and the second movable channel (232) are in communication, the first mounting seat (22) is further provided with a first pressure relief channel (222) in communication with the outside, the first pressure relief channel (222) is in communication with the first movable channel (221), the valve body (1) is provided with a second pressure relief channel (16) in communication with the outside, the second pressure relief channel (16) is in communication with the third movable channel (14), so that: When the driving member (21) drives the pushing assembly (31) to move downward, the pushing assembly (31) blocks the first movable channel (221), and the pushing assembly (31) pushes the movable assembly (32) downward, so that the movable assembly (32) is in an open state, and the gas flows from the inlet (12) along the first path to the third connecting channel (15), the fourth connecting channel (234), the second movable channel (232), the first cavity (5), the second connecting channel (233) and the second cavity (6) in sequence, and presses the piston device (4) downward, so that the piston device (4) no longer blocks the first connecting channel (13), thereby allowing the fluid to flow from the inlet (12) along the second path to the first connecting channel (13) and the outlet (11) in sequence; When the driving member (21) is released, the pushing assembly (31) moves upward, and the pushing assembly (31) no longer blocks the first movable channel (221). At the same time, the pushing assembly (31) no longer pushes the movable assembly (32) downward, and the movable assembly (32) moves upward to a closed state to block the second movable channel (232). The gas flows to the outside along a third path from the second cavity (6), the second connecting channel (233), the first cavity (5), the first movable channel (221) and the first pressure relief channel (222), so that the piston device (4) moves upward and blocks the first connecting channel (13).

3. A valve capable of multiple inching according to claim 2, characterized in that: The ejection assembly (31) comprises an ejector pin (311) and a first elastic member (312); a second mounting groove (223) is further provided in the first mounting seat (22); the ejector pin (311) is movably arranged in the first movable channel (221); the upper end of the ejector pin (311) is connected to the driving member (21); the outer wall of the ejector pin (311) is sleeved with the first elastic member (312); the bottom end of the first elastic member (312) abuts against the second mounting groove (223), so that: When the driving member (21) drives the ejector pin (311) to move downward, the first elastic member (312) is in a compressed state, the ejector pin (311) blocks the first movable channel (221), and the bottom end of the ejector pin (311) extends out of the first movable channel (221) and pushes the movable component (32) downward; When the driving member (21) is released, the first elastic member (312) is in an extended state to drive the ejector pin (311) to move upward, and the ejector pin (311) no longer blocks the first movable channel (221), and the ejector pin (311) is separated from the movable component (32).

4. A valve capable of multiple inching according to claim 3, characterized in that: The ejector pin (311) is also sleeved with a first sealing ring (313) for sealing the first movable channel (221).

5. A valve capable of multiple inching according to claim 2, characterized in that: The movable assembly (32) comprises a mounting member (321) and a movable rod (322); the mounting member (321) is arranged in the second movable channel (232); a fourth movable channel (3211) is provided in the mounting member (321); and the movable rod (322) is movably inserted in the fourth movable channel (3211), so that: When the pushing device (3) pushes the movable rod (322) downward, the movable rod (322) moves downward along the fourth movable channel (3211), so that the bottom end of the movable rod (322) does not block the fourth movable channel (3211), and at this time, the bottom end of the second movable channel (232) is connected to the first cavity (5) through the fourth movable channel (3211); When the pushing assembly (31) moves upward, it no longer pushes the movable rod (322) downward, and the gas flows along the fourth path from the inlet (12) to the third connecting channel (15), the fourth connecting channel (234), and the bottom end of the second movable channel (232) and presses the movable rod (322) upward, so that the movable rod (322) moves upward to block the fourth movable channel (3211), and the bottom end of the second movable channel (232) is no longer connected to the first cavity (5).

6. A valve capable of multiple inching according to claim 5, characterized in that: A second sealing ring (323) is sleeved on the outer wall of the middle part of the mounting member (321), and the second sealing ring (323) is used to prevent the bottom end of the second movable channel (232) from being connected to the top end thereof.

7. A valve capable of multiple inching according to claim 2, characterized in that: The piston device (4) comprises a piston rod (41), a second elastic member (42) and a flow guide member (43). A third mounting groove (17) is provided in the valve body (1). The piston rod (41) is movably arranged in the third movable channel (14). The outer wall of the top end of the piston rod (41) is sleeved with the second elastic member (42). The bottom end of the second elastic member (42) abuts against the bottom end of the third mounting groove (17). The piston rod (41) passes through the third movable channel (14) and the first connecting channel (13) in sequence, and the bottom end of the piston rod (41) extends to the lower end of the first connecting channel (13). The end of the piston rod (41) is inserted into the flow guide member (43). The outer wall of the top end of the flow guide member (43) is also sleeved with a third sealing ring (44), so that: When the gas in the second cavity (6) presses the piston rod (41) downward, the second elastic member (42) is in a compressed state, the piston rod (41), the flow guide member (43) and the third sealing ring (44) move downward synchronously, and the third sealing ring (44) no longer blocks the first connecting channel (13), thereby allowing the fluid to flow from the inlet (12) to the outlet (11) along the second path; When the gas flows toward the outside along the third path, the second elastic member (42) is in an extended state to drive the piston rod (41), the flow guide member (43) and the third sealing ring (44) to move upward synchronously, and the third sealing ring (44) blocks the first connecting channel (13).

8. A valve capable of multiple inching according to claim 7, characterized in that: A fourth sealing ring (45) is provided at the top end of the piston rod (41), and the fourth sealing ring (45) is used to prevent the second cavity (6) from being connected to the third mounting groove (17); A fifth sealing ring (46) is provided in the valve body (1), and the fifth sealing ring (46) is arranged in close contact with the outer wall of the piston rod (41). The fifth sealing ring (46) is used to prevent the third movable channel (14) from being connected to the third mounting groove (17).

9. A valve capable of multiple inching according to claim 2, characterized in that: The second mounting seat (23) is inserted into one end of the valve body (1) and is provided with a plurality of sixth sealing rings (235).

10. A valve capable of multiple inching according to claim 2, characterized in that: The driving member (21) is an electromagnet.

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