An anti-misspray deluge valve and a fire-fighting device

Abstract

The present invention provides an anti-misspray deluge valve and a fire-fighting device, which relates to the technical field of fire-fighting devices and solves the technical problem that the deluge valve in the prior art is prone to misspray due to the pressure fluctuation at the inlet end. The anti-misspray deluge valve includes a main valve body, a piston assembly and a control valve. The main valve body includes a water inlet passage and a water outlet passage; the first end of the piston assembly extends into the water outlet passage and the second end of the piston assembly can block the water inlet passage; the second end of the piston assembly extends into the inner cavity of the control valve to divide the inner cavity of the control valve into a reset cavity and a control cavity, and a pressure relief water outlet hole is arranged in the control cavity; through the mutual cooperation of the control valve and the piston assembly, the present invention can maintain the corresponding positions of the piston assembly after it is opened and closed, greatly reducing the influence of the pressure fluctuation in the fire-fighting system pipe network on the position of the piston assembly, effectively preventing the water flow from flowing back and reducing the risk of misspray.

Description

Technical Field

[0001] The present invention relates to the technical field of fire-fighting equipment, and in particular to an anti-misspray deluge valve and fire-fighting equipment. Background Art

[0002] A deluge valve refers to a control valve that can achieve automatic water supply by controlling the fire water supply pipeline, and can be opened by electric, hydraulic, pneumatic and mechanical means.

[0003] Generally, market deluge valves are divided into two types: diaphragm control and piston cylinder control. Diaphragm control is popular in the market, while piston cylinder control is rare. In terms of function, the national standard has a mandatory requirement that the deluge valve must have an "anti-reset locking mechanism". The anti-reset locking mechanism refers to a locking mechanism that prevents the valve flap assembly from returning to its closed position after actuation. To achieve this function, the external piping and accessories of the deluge valve are designed very complexly. At the same time, a drain valve must be set, and there are strict requirements for the standby pressure, which must be stable (stipulated in the national standard, otherwise there will be a risk of misspray). However, it is very difficult to achieve pressure stability in the field conditions. For example, when a deluge valve is working, the dynamic pressure drops, but when the deluge valve stops operating and closes, the static pressure rises. Then, pressure fluctuations occur at the inlet end of the deluge valve in the standby state on the same pipeline, which will cause a risk of misspray, and misspray will also cause property losses; when the rubber parts of the deluge valve are damaged and need to be maintained, the whole deluge valve needs to be removed, which is inconvenient for maintenance and increases the maintenance cost.

[0004] Therefore, how to solve the technical problem that the deluge valve in the prior art is prone to misspray due to pressure fluctuations at the inlet end has become an important technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide an anti-misspray deluge valve and fire-fighting equipment, which solves the technical problem that the deluge valve in the prior art is prone to misspray due to pressure fluctuations at the inlet end. The preferred technical solutions provided by the present invention can produce many technical effects, which will be elaborated below.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] The anti-misspray deluge valve provided by the present invention includes:

[0008] A main valve body, including an inlet channel and an outlet channel;

[0009] A piston assembly, the first end of the piston assembly extends into the outlet channel, and the second end of the piston assembly can block the inlet channel;

[0010] Control valve, the second end of the piston assembly extends into the inner cavity of the control valve to divide the inner cavity of the control valve into a reset cavity and a control cavity, and a pressure relief water outlet is provided in the control cavity;

[0011] Wherein, when opened, the control cavity is communicated with the water inlet channel, and the reset cavity is communicated with the water inlet channel, and the water in the water inlet channel presses the piston assembly to move, so that the water inlet channel is communicated with the water outlet channel;

[0012] When closed, the control cavity is cut off from the water inlet channel, and the pressure relief water outlet is opened, the reset cavity is communicated with the water inlet channel, and the water in the water inlet channel continuously enters the reset cavity for water replenishment, so that the piston assembly moves reversely to block the water inlet channel, and the water inlet channel is cut off from the water outlet channel.

[0013] Further, the piston assembly includes a piston rod, a water replenishing port is arranged on the piston rod along its axial direction, and the reset cavity and the water inlet channel are respectively communicated with the water replenishing port.

[0014] Further, the piston assembly includes a shielding and sealing member, a piston head and an elastic member, the shielding and sealing member and the piston head are respectively arranged at both ends of the piston rod, the piston head extends into the inner cavity of the control valve, the shielding and sealing member can shield at the water inlet channel, and the elastic member is sleeved on the piston rod and the elastic member is abutted and arranged between the shielding and sealing member and the control valve.

[0015] Further, the shielding and sealing member includes a valve flap, a sealing plate and a pressing plate, the valve flap is connected to the piston rod, the pressing plate is connected to the valve flap, the sealing plate is arranged on the circumference of the valve flap, and the sealing plate is clamped between the pressing plate and the valve flap.

[0016] Further, it includes a first switching valve and a second switching valve, a first water outlet is arranged on the side of the water inlet channel, a pressurized water inlet is arranged on the side of the control cavity, the first switching valve is arranged between the first water outlet and the pressurized water inlet, and the second switching valve is arranged at the position of the pressure relief water outlet.

[0017] Further, it includes a second water outlet, the second water outlet is arranged on the side of the water outlet channel, and the second water outlet can be communicated with the fire sprinkler system.

[0018] Further, it also includes a third water outlet, a fourth water outlet and an alarm member, the third water outlet is arranged on the side of the water inlet channel, the fourth water outlet is arranged on the side of the water outlet channel, and the third water outlet and the fourth water outlet are respectively connected to the alarm member.

[0019] Further, the control valve includes a secondary valve body, a valve cover, and a limit rubber plate. The bottom of the secondary valve body is connected to the main valve body, the top of the secondary valve body is connected to the valve cover, and the limit rubber plate is clamped between the secondary valve body and the valve cover.

[0020] Further, the control valve further includes a pressure measuring hole opened on the valve cover, and the pressure measuring hole is communicated with the reset cavity.

[0021] The fire fighting equipment provided by the present invention includes a fire fighting system pipe network, a fire sprinkler system, and the above anti-misspray deluge valve. The main valve body is communicated with the fire fighting system pipe network, and the water outlet channel is communicated with the fire sprinkler system.

[0022] The present invention has the following beneficial effects compared with the prior art:

[0023] For the anti-misspray deluge valve provided by the present invention, by providing a main valve body, a piston assembly, and a control valve, when it is necessary to open the anti-misspray deluge valve, the control cavity is communicated with the water inlet channel. At this time, the pressure relief water outlet hole is closed, so that the water in the water inlet channel continuously enters the control cavity, and the reset cavity is communicated with the water inlet channel. The water in the reset cavity continuously flows back into the water inlet channel. The water in the water inlet channel squeezes the piston assembly to move, and the water in the control cavity also pressurizes and pushes the first end of the piston assembly, so that the second end of the piston assembly moves away from the water inlet channel. The water inlet channel is communicated with the water outlet channel, and through the pressurization and pushing of the water in the control cavity on the first end of the piston assembly, the piston assembly can be kept in the away position.

[0024] When it is necessary to close the anti-misspray deluge valve, the control cavity is cut off from the water inlet channel, and the pressure relief water outlet hole is opened. The water in the control cavity continuously flows out from the pressure relief water outlet hole. The reset cavity is communicated with the water inlet channel, and the water in the water inlet channel continuously enters the reset cavity for water replenishment, forming extrusion on the first end of the piston assembly, so that the piston assembly moves reversely to block the water inlet channel. The water inlet channel is cut off from the water outlet channel, and the reset cavity remains communicated with the water inlet channel, and the internal water is full, maintaining the extrusion on the first end of the piston assembly, so that the piston assembly keeps the blocking position. Through the mutual cooperation of the control valve and the piston assembly, the present invention can keep the corresponding positions of the piston assembly after opening and closing, greatly reducing the influence of the pressure fluctuation in the fire fighting system pipe network on the position of the piston assembly, effectively preventing the backflow of water, and reducing the risk of misspray. Description of the Drawings

[0025] 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 also be obtained based on these drawings.

[0026] Figure 1 is a schematic internal structure diagram of the anti-misspray deluge valve provided by an embodiment of the present invention;

[0027] Figure 2 is a schematic external structure diagram of the anti-misspray deluge valve provided by an embodiment of the present invention.

[0028] In the figure, 1 - main valve body; 2 - piston assembly; 3 - control valve; 4 - water inlet channel; 5 - water outlet channel; 6 - reset cavity; 7 - control cavity; 8 - pressure relief water outlet part; 9 - piston rod; 10 - water replenishing port; 11 - shielding seal; 12 - piston head; 13 - elastic member; 14 - valve flap; 15 - sealing plate; 16 - pressing plate; 17 - first switching valve; 18 - second switching valve; 19 - first water outlet hole; 20 - pressurized water inlet hole; 21 - second water outlet hole; 22 - third water outlet hole; 23 - fourth water outlet hole; 24 - secondary valve body; 25 - valve cover; 26 - limiting rubber plate; 27 - pressure measuring hole; 28 - control water port; 29 - fastener. Detailed Embodiments

[0029] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will describe the technical solutions of the present invention in detail. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0030] The objective of the present invention is to provide an anti-misspray deluge valve and a fire-fighting device, which solve the technical problem that the deluge valve in the prior art is prone to misspray due to pressure fluctuations at the inlet end.

[0031] Hereinafter, the embodiments will be described with reference to the drawings. In addition, the embodiments shown below do not limit the content of the invention described in the claims in any way. Further, all the contents of the configurations shown in the following embodiments are not necessarily required for the solution of the invention described in the claims.

[0032] The following will describe the technical solutions of the present invention in detail with specific embodiments.

[0033] Embodiment 1:

[0034] Refer to Figure 1-2, the anti-misspray deluge valve provided in this embodiment includes a main valve body 1, a piston assembly 2, and a control valve 3. The main valve body 1 includes a water inlet passage 4 and a water outlet passage 5. The water inlet passage 4 and the water outlet passage 5 can be connected to the fire protection system pipeline network so as to connect the main valve body 1 in series in the fire protection system pipeline network. The first end of the piston assembly 2 extends into the water outlet passage 5 and the second end of the piston assembly 2 can block the water inlet passage 4, that is, the first end of the piston assembly 2 can pull the second end of the piston assembly 2 closer to or away from the water inlet passage 4, so that the water inlet passage 4 and the water outlet passage 5 are cut off or conducted. The second end of the piston assembly 2 extends into the inner cavity of the control valve 3 to divide the inner cavity of the control valve 3 into a reset cavity 6 and a control cavity 7, that is, by pressurizing the control cavity 7 or the reset cavity 6, the piston assembly 2 can be promoted to move forward or backward. The control cavity 7 is provided with a pressure relief water outlet hole. After the pressure relief water outlet hole is opened, the water in the control cavity 7 can flow out to relieve the pressure of the control cavity 7. With such a setting, when it is necessary to open the anti-misspray deluge valve, the control cavity 7 is connected to the water inlet passage 4. At this time, the pressure relief water outlet hole is closed, so that the water in the water inlet passage 4 continuously enters the control cavity 7, and the reset cavity 6 is connected to the water inlet passage 4, and the water in the reset cavity 6 continuously flows back to the water inlet passage 4. The water in the water inlet passage 4 squeezes the piston assembly 2 to move, and the water in the control cavity 7 also pressurizes and pushes the first end of the piston assembly 2, so that the second end of the piston assembly 2 moves away from the water inlet passage 4. The water inlet passage 4 is connected to the water outlet passage 5, and through the pressurizing and pushing of the water in the control cavity 7 on the first end of the piston assembly 2, the piston assembly 2 can be kept in the away position.

[0035] When it is necessary to close the anti-misspray deluge valve, the control cavity 7 is cut off from the water inlet passage 4, and the pressure relief water outlet hole is opened. The water in the control cavity 7 continuously flows out from the pressure relief water outlet hole. The reset cavity 6 is connected to the water inlet passage 4, and the water in the water inlet passage 4 continuously enters the reset cavity 6 for water replenishment, forming an extrusion on the first end of the piston assembly 2, so that the piston assembly 2 moves reversely to block the water inlet passage 4. The water inlet passage 4 is cut off from the water outlet passage 5, and the reset cavity 6 remains connected to the water inlet passage 4, and the internal water is full, maintaining the extrusion on the first end of the piston assembly 2, so that the piston assembly 2 keeps the blocking position. Through the mutual cooperation of the control valve 3 and the piston assembly 2, the present invention can maintain the corresponding positions of the piston assembly 2 after opening and closing, greatly reducing the influence of the pressure fluctuation in the fire protection system pipeline network on the position of the piston assembly 2, effectively preventing the backflow of water, reducing the risk of misspray, and solving the technical problem that the deluge valve in the prior art is prone to misspray due to the pressure fluctuation at the inlet end.

[0036] Embodiment 2:

[0037] Refer to Figure 1-2, based on Embodiment 1, the specific structure of the anti-misspray deluge valve is further defined in this embodiment. Among them, the piston assembly 2 includes a piston rod 9. A water replenishing port 10 is arranged along the axial direction of the piston rod 9. The reset cavity 6 and the water inlet passage 4 are respectively connected to the water replenishing port 10, that is, the water inlet passage 4 is connected to the reset cavity 6 through the water replenishing port 10. When the anti-misspray deluge valve needs to be opened, the water in the reset cavity 6 can be discharged into the water inlet passage 4 in time under the extrusion effect through the water replenishing port 10. When the anti-misspray deluge valve needs to be closed, the water in the water inlet passage 4 can enter the reset cavity 6 through the water replenishing port 10 in time for supplementary pressurization. Moreover, the water replenishing port 10 is built in the piston rod 9, with a short distance and timely response.

[0038] As an optional implementation manner of the embodiment of the present invention, the piston assembly 2 includes a shielding and sealing member 11, a piston head 12 and an elastic member 13. The shielding and sealing member 11 and the piston head 12 are respectively fixedly connected to both ends of the piston rod 9 and move synchronously with the piston rod 9. The piston head 12 extends into the inner cavity of the control valve 3. The shielding and sealing member 11 is a plate-shaped member that can shield and cover the water inlet passage 4, that is, the position of the water inlet passage 4 and the water outlet passage 5 can be the control water port 28. The shielding and sealing member 11 shields at the control water port 28 of the water inlet passage 4. The elastic member 13 is sleeved on the piston rod 9, and the elastic member 13 is abutted between the shielding and sealing member 11 and the control valve 3 to provide a restoring elastic force for the shielding and sealing member 11 conveniently. The elastic member 13 can be but is not limited to a spring. With such a setting, when the anti-misspray deluge valve needs to be opened, the main valve body 1 intakes water from bottom to top through the water inlet passage 4, and the water inlet passage 4 is connected to the control cavity 7. Under the pressure difference between the control cavity 7 and the water inlet passage 4, the control cavity 7 is continuously replenished with water and pressurized. At the same time, the reset cavity 6 drains water through the water replenishing port 10 and loses pressure. The sum of the extrusion force of the control cavity 7 on the piston head 12 and the extrusion force of the water inlet passage 4 on the shielding and sealing member 11 is greater than the sum of the extrusion force of the elastic member 13 on the shielding and sealing member 11 and the extrusion force of the reset cavity 6 on the piston head 12, so that the shielding and sealing member 11 is opened upward along the axial direction of the piston rod 9, and the water inlet passage 4 is connected to the water outlet passage 5.

[0039] When it is necessary to close the anti-mist spray deluge valve, the control chamber 7 is cut off from the water inlet passage 4, and the pressure relief water outlet hole is opened. The water in the control chamber 7 continuously flows out from the pressure relief water outlet hole, and the extrusion force of the control chamber 7 on the piston head 12 gradually decreases. The extrusion forces of the reset chamber 6 and the control chamber 7 on the piston head 12 are gradually unbalanced. The water in the water inlet passage 4 continuously enters the reset chamber 6 for water replenishment. The sum of the extrusion force of the elastic member 13 on the shielding seal 11 and the extrusion force of the reset chamber 6 on the piston head 12 is greater than the sum of the extrusion force of the control chamber 7 on the piston head 12 and the extrusion force of the water inlet passage 4 on the shielding seal 11, so that the shielding seal 11 moves downward axially along the piston rod 9 to reset. Finally, the shielding seal 11 presses tightly against the water inlet passage 4, so that there is no water pressure at the water outlet passage 5, and then it is completely closed. At this time, the pressure relief water outlet hole can be closed to make the anti-mist spray deluge valve in the initial closed state.

[0040] Further, the shielding seal 11 includes a valve flap 14, a sealing plate 15 and a pressing plate 16. The valve flap 14 is connected to the piston rod 9, and the connection can be but is not limited to thread connection, clamping or bonding. The pressing plate 16 is connected to the valve flap 14, and the connection can be but is not limited to bolt connection or clamping. The sealing plate 15 is arranged circumferentially on the valve flap 14. The sealing plate 15 can be but is not limited to rubber or silica gel material. The lower side surface of the sealing plate 15 can be squeezed and fitted with the end of the opening of the water inlet passage 4, so that the sealing performance is better when the two are in contact. And the sealing plate 15 is clamped between the pressing plate 16 and the valve flap 14, that is, the sealing plate 15 can be clamped and fixed on the valve flap 14 by the pressing plate 16 arranged at the middle position thereof, the connection is more stable, and the deformation caused by uneven force of the sealing plate 15 is avoided. The valve flap 14, the sealing plate 15 and the pressing plate 16 can be sleeved on the second end of the piston rod 9 in sequence and then fixed by a fastener 29.

[0041] As an optional implementation manner of the embodiment of the present invention, the anti-mist spray deluge valve includes a first switching valve 17 and a second switching valve 18. A first water outlet hole 19 is arranged on the side of the water inlet passage 4, and a pressurized water inlet hole 20 is arranged on the side of the control chamber 7. The first switching valve 17 is arranged between the first water outlet hole 19 and the pressurized water inlet hole 20. The first switching valve 17 is arranged outside the main valve body 1, that is, the communication state between the water inlet passage 4 and the control chamber 7 is adjusted through an external pipeline, so as to adjust the opening and closing state of the deluge valve, and the adjustment is more flexible and convenient. The second switching valve 18 is arranged at the position of the pressure relief water outlet hole, that is, the second switching valve 18 can be externally arranged outside the main valve body 1, and can adjust the opening and closing of the pressure relief water outlet hole, and further cooperate with the first switching valve 17 to adjust the opening and closing state of the deluge valve. The first switching valve 17 and the second switching valve 18 can be but are not limited to manual ball valves or solenoid valves, and can open and close the deluge valve through remote electric or on-site manual methods, and the adjustment is convenient to use.

[0042] As an optional implementation manner of the embodiment of the present invention, the anti-misspray deluge valve includes a second water outlet hole 21, the second water outlet hole 21 is arranged on the side of the water outlet channel 5, and the second water outlet hole 21 can be communicated with the fire sprinkler system. With such a setting, when the anti-misspray deluge valve is opened, the water inlet channel 4 is communicated with the water outlet channel 5, and the water in the water inlet channel 4 enters the fire sprinkler system through the second water outlet hole 21. When the anti-misspray deluge valve is closed, the water inlet channel 4 is cut off from the water outlet channel 5, and the water supply of the water inlet channel 4 to the fire sprinkler system is closed.

[0043] As an optional implementation manner of the embodiment of the present invention, the anti-misspray deluge valve further includes a third water outlet hole 22, a fourth water outlet hole 23 and an alarm component. The third water outlet hole 22 is arranged on the side of the water inlet channel 4, the fourth water outlet hole 23 is arranged on the side of the water outlet channel 5, and the third water outlet hole 22 and the fourth water outlet hole 23 are respectively connected to the alarm component. Specifically, a normally closed switch valve may be connected in series between the third water outlet hole 22 and the alarm component, and a normally open switch valve may be connected in series between the fourth water outlet hole 23 and the alarm component. The alarm component may be, but is not limited to, a hydraulic alarm bell. When the water inlet channel 4 is communicated with the water outlet channel 5, the water in the water inlet channel 4 flows into the water outlet channel 5 and enters the alarm component through the fourth water outlet hole 23 for alarm.

[0044] As an optional implementation manner of the embodiment of the present invention, the control valve 3 includes a secondary valve body 24, a valve cover 25 and a limit rubber plate 26. The bottom of the secondary valve body 24 is connected to the main valve body 1, the top of the secondary valve body 24 is connected to the valve cover 25, and the limit rubber plate 26 is clamped between the secondary valve body 24 and the valve cover 25. The limit rubber plate 26 can limit the connection position between the valve cover 25 and the secondary valve body 24 to facilitate the accurate connection between the two and make the chain structure between the two have better sealing performance. The control valve 3 and the main valve body 1 are combined to form a Y-shaped valve body structure. The secondary valve body 24 can allow the piston rod 9 to be inclined and inserted. The connection between the valve cover 25 and the secondary valve body 24 can be a detachable connection, which is convenient for the maintenance and replacement of the piston assembly 2.

[0045] Further, the control valve 3 further includes a pressure measuring hole 27. The pressure measuring hole 27 is opened on the valve cover 25, and the pressure measuring hole 27 is communicated with the reset cavity 6. With such a setting, the pressure measuring hole 27 can be connected to a pressure measuring component to facilitate the observation of the water pressure in the reset cavity 6. The pressure measuring component may be, but is not limited to, a water pressure gauge.

[0046] Embodiment 3:

[0047] Refer to Figure 1-2, the fire-fighting equipment provided in this embodiment includes a fire-fighting system pipe network, a fire sprinkler system, and the above anti-misspray deluge valve. The main valve body 1 is connected to the fire-fighting system pipe network, that is, the water outlet passage 5 and the water inlet passage 4 are connected in series in the fire-fighting system pipe network, and the water outlet passage 5 is connected to the fire sprinkler system. When the water inlet passage 4 is connected to the water outlet passage 5, part of the water can enter the fire sprinkler system, and the remaining water can enter the fire-fighting system pipe network through the water outlet passage 5. By setting the anti-misspray deluge valve in the fire-fighting equipment, when it is necessary to open the anti-misspray deluge valve, the control chamber 7 is connected to the water inlet passage 4. At this time, the pressure relief water outlet hole is closed, so that the water in the water inlet passage 4 continuously enters the control chamber 7, and the reset chamber 6 is connected to the water inlet passage 4, and the water in the reset chamber 6 continuously flows back to the water inlet passage 4. The water in the water inlet passage 4 squeezes the piston assembly 2 to move, and the water in the control chamber 7 also presses and pushes the first end of the piston assembly 2, so that the second end of the piston assembly 2 moves away from the water inlet passage 4. The water inlet passage 4 is connected to the water outlet passage 5, and by the pressure and push of the water in the control chamber 7 on the first end of the piston assembly 2, the piston assembly 2 can be kept in the away position. When it is necessary to close the anti-misspray deluge valve, the control chamber 7 is cut off from the water inlet passage 4, and the pressure relief water outlet hole is opened. The water in the control chamber 7 continuously flows out from the pressure relief water outlet hole. The reset chamber 6 is connected to the water inlet passage 4, and the water in the water inlet passage 4 continuously enters the reset chamber 6 for water replenishment, forming a squeeze on the first end of the piston assembly 2, so that the piston assembly 2 moves in the reverse direction to block the water inlet passage 4. The water inlet passage 4 is cut off from the water outlet passage 5, and the reset chamber 6 remains connected to the water inlet passage 4, and the internal water is full, maintaining the squeeze on the first end of the piston assembly 2, so that the piston assembly 2 is kept in the blocking position. Through the mutual cooperation of the control valve 3 and the piston assembly 2, the present invention can maintain the corresponding positions of the piston assembly 2 after opening and closing, greatly reducing the influence of the pressure fluctuation in the fire-fighting system pipe network on the position of the piston assembly 2, effectively preventing the backflow of water, and reducing the risk of misspray.

[0048] In the description of the present invention, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An anti-misspray deluge valve, characterized in that, Comprising: A main valve body (1), including a water inlet channel (4) and a water outlet channel (5); A piston assembly (2), with the first end of the piston assembly (2) extending into the water outlet channel (5) and the second end of the piston assembly (2) capable of blocking the water inlet channel (4); A control valve (3), with the second end of the piston assembly (2) extending into the inner cavity of the control valve (3) to divide the inner cavity of the control valve (3) into a reset cavity (6) and a control cavity (7), and a pressure relief and water outlet part (8) is provided in the control cavity (7); Wherein, when opened, the control cavity (7) is communicated with the water inlet channel (4), and the reset cavity (6) is communicated with the water inlet channel (4). The water in the water inlet channel (4) presses the piston assembly (2) to move, so that the water inlet channel (4) is communicated with the water outlet channel (5); When closed, the control cavity (7) is cut off from the water inlet channel (4), and the pressure relief and water outlet part (8) is opened. The reset cavity (6) is communicated with the water inlet channel (4). The water in the water inlet channel (4) continuously enters the reset cavity (6) for water replenishment, so that the piston assembly (2) moves reversely to block the water inlet channel (4), and the water inlet channel (4) is cut off from the water outlet channel (5); The piston assembly (2) includes a piston rod (9), and a water replenishment port (10) is arranged along the axial direction of the piston rod (9). The reset cavity (6) and the water inlet channel (4) are respectively communicated with the water replenishment port (10); The piston assembly (2) includes a shielding seal (11), a piston head (12) and an elastic member (13). The shielding seal (11) and the piston head (12) are respectively arranged at both ends of the piston rod (9). The piston head (12) extends into the inner cavity of the control valve (3). The shielding seal (11) can block at the water inlet channel (4). The elastic member (13) is sleeved on the piston rod (9) and the elastic member (13) is abutted and arranged between the shielding seal (11) and the control valve (3); The shielding seal (11) includes a valve flap (14), a sealing plate (15) and a pressing plate (16). The valve flap (14) is connected to the piston rod (9), the pressing plate (16) is connected to the valve flap (14), the sealing plate (15) is arranged on the circumference of the valve flap (14), and the sealing plate (15) is clamped between the pressing plate (16) and the valve flap (14); Including a first switching valve (17) and a second switching valve (18). A first water outlet hole (19) is arranged on the side of the water inlet channel (4), a pressurized water inlet hole (20) is arranged on the side of the control cavity (7). The first switching valve (17) is arranged between the first water outlet hole (19) and the pressurized water inlet hole (20), and the second switching valve (18) is arranged at the position of the pressure relief and water outlet part (8); It further includes a third water outlet hole (22), a fourth water outlet hole (23) and an alarm member. The third water outlet hole (22) is arranged on the side of the water inlet passage (4), the fourth water outlet hole (23) is arranged on the side of the water outlet passage (5), and the third water outlet hole (22) and the fourth water outlet hole (23) are respectively connected to the alarm member.

2. The anti-mist spraying deluge valve according to claim 1, wherein It includes a second water outlet hole (21). The second water outlet hole (21) is arranged on the side of the water outlet passage (5), and the second water outlet hole (21) can communicate with a fire sprinkler system.

3. The anti-misspray deluge valve according to claim 1, characterized in that, The control valve (3) includes a secondary valve body (24), a valve cover (25) and a limiting rubber plate (26). The bottom of the secondary valve body (24) is connected to the main valve body (1), the top of the secondary valve body (24) is connected to the valve cover (25), and the limiting rubber plate (26) is clamped between the secondary valve body (24) and the valve cover (25).

4. The anti-mist spraying deluge valve according to claim 3, wherein, The control valve (3) further includes a pressure measuring hole (27). The pressure measuring hole (27) is opened on the valve cover (25), and the pressure measuring hole (27) communicates with the reset cavity (6).

5. A fire-fighting device, characterized in that, It includes a fire protection system pipe network, a fire sprinkler system and the anti-misspray deluge valve according to any one of claims 1-4. The main valve body (1) communicates with the fire protection system pipe network, and the water outlet passage (5) communicates with the fire sprinkler system.

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