Indoor intelligent rapid emergency fire hydrant

Abstract

This invention relates to the field of fire-fighting equipment technology, and in particular to an indoor intelligent rapid emergency fire hydrant. Its structure includes: a fire hydrant box, with an inlet pipe connected internally to the box and connected externally. A switch valve is vertically installed on the inlet pipe, and a loop-shaped flow-slowing section is installed above the switch valve. The loop-shaped flow-slowing section contains a gradually opening valve and a main valve, as well as a water pressure trigger that cooperates with the main valve. The beneficial effect is that by setting a delayed gradually opening mechanism composed of the gradually opening valve and the main valve, and configuring a water pressure trigger that cooperates with the main valve inside the loop-shaped flow-slowing section, after the switch valve opens, it first outputs 30% to 35% pre-charged water flow after a 12-second delay, and then the main valve fully opens after a 7 to 9-second delay. This provides the operator with approximately 19 to 21 seconds of buffer time, allowing them to independently complete hose deployment, positioning, and aiming actions, solving the problem of traditional fire hydrants requiring two people to operate.

Description

Technical Field

[0001] This invention relates to an indoor intelligent rapid emergency fire hydrant, belonging to the field of fire protection equipment technology. Background Technology

[0002] Fire hydrants are important facilities in building fire protection systems and are widely used in various civil buildings and industrial plants. In the early stages of a fire, the rapid and effective use of fire hydrants to extinguish the fire is of great significance in controlling the spread of the fire and reducing casualties and property losses.

[0003] The existing traditional indoor fire hydrants have the following shortcomings in actual use: First, traditional fire hydrants require two people to operate, one person is responsible for opening the valve and controlling the water pressure, and the other person is responsible for holding the water gun and aiming it at the fire source. It is impossible for a single person to complete the operation. Second, the valve of the traditional fire hydrant is a quick-opening and closing structure. The water pressure increases sharply when it is opened, and the water gun generates a huge recoil force, which is difficult for a single person to hold. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an intelligent, rapid-response indoor fire hydrant to solve the following deficiencies of existing traditional indoor fire hydrants in practical use: First, traditional fire hydrants require two people to operate, one to open the valve and control the water pressure, and the other to hold the water gun and aim it at the fire source, making it impossible for a single person to complete the operation; Second, the valve of traditional fire hydrants has a rapid-opening and closing structure, and the water pressure increases sharply at the moment of opening, generating a huge recoil force on the water gun, making it difficult for a single person to hold.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: an indoor intelligent rapid emergency fire hydrant, the structure of which includes: a fire hydrant box, wherein the fire hydrant box is internally connected to an externally connected water inlet pipe, a switch valve is vertically installed on the water inlet pipe, the valve stem of the switch valve faces outward of the box for easy operation, a loop-shaped slow flow section is provided on the pipe above the switch valve, a hose connector is provided at the end of the loop-shaped slow flow section, and an involute valve and a main valve are provided inside the loop-shaped slow flow section, as well as a water pressure trigger that cooperates with the main valve; The gradually opening valve is used to open after a first preset time after the switch valve is opened, delivering pre-charged water flow accounting for 30%-35% of the total flow into the meandering flow section. The water pressure trigger is used to control the main valve to open after a second preset time after detecting that the water pressure in the meandering flow section has reached a preset threshold, so that the water flow reaches the fully open state. The first preset time is 12 seconds, and the second preset time is 7 to 9 seconds. Through the above settings, time is reserved for the operator to deploy the hose, move to position, and aim at the fire source, enabling independent operation by a single person. At the same time, the pre-charged water flow allows the hose to slowly fill and the pipeline to pressurize smoothly, eliminating water hammer impact and recoil and preventing the hose from twisting and knotting.

[0006] Preferably, the involute valve includes an outer sleeve valve and an inner core valve. The outer sleeve valve is securely fitted onto the head of the horizontal section of the meandering flow section. The inner core valve is coaxially rotatably fitted onto the inner side of the outer sleeve valve. The circumferential walls of the outer sleeve valve and the inner core valve are provided with several elongated outlets in the circumferential direction. The involute valve also includes a flow-slowing tube. The head of the flow-slowing tube is connected to the pipe above the switch valve. The flow-slowing tube is arranged to conform to the curvature of the inner wall of the pipe. The inside of the flow-slowing tube is provided with several intersectingly arranged integrally formed flow-slowing protrusions. The tail of the flow-slowing tube is provided with a pressure chamber and a rebound chamber. A pressure block and a pull-back block are provided on the outer side of the inner core valve. The pressure block is slidably sealed in the pressure chamber, and the pull-back block is slidably disposed in the spring-loaded chamber. A pull-back spring is provided in the spring-loaded chamber. The two ends of the pull-back spring are respectively connected to the inner wall of the pull-back block and the slow-flow tube. A pressure relief port is provided on one side of the pressure chamber.

[0007] Preferably, the slow-flow pipe is arranged in a U-shape, and the water flow first fills the distal end in the slow-flow pipe and then flows back. After passing through the cross-blocking of several slow-flow protrusions, the flow velocity is gradually reduced to achieve a time delay for the water flow to reach the pressure chamber. The outer diameter of the outer valve is smaller than the inner diameter of the U-shaped slow-flow section pipe, so that the water flowing out of the outlet passes through the annular gap between the outer valve and the inner wall of the pipe.

[0008] Preferably, the main valve includes a valve body sleeve, a valve core sleeve, an upper sealing valve plate, a lower sealing valve plate, and a water pressure trigger. The valve body sleeve is coaxially disposed at the horizontal middle end of the loop-shaped slow flow section, and the head of the valve body sleeve is fitted inside the inner core valve of the involute valve for transmitting the water flow out of the inner core valve. The valve core sleeve is tightly fitted inside the valve body sleeve. A partition plate is integrally disposed in the middle of the valve core sleeve, which divides the inside of the valve core sleeve into two independent chambers. The outlet end of the valve core sleeve has a vertically symmetrical V-shaped inclined opening.

[0009] Preferably, the upper sealing valve plate and the lower sealing valve plate are movably mounted on the valve body sleeve, and respectively seal and cooperate with the upper and lower parts of the V-shaped inclined opening. Reset springs are symmetrically arranged between the upper sealing valve plate and the valve core sleeve, and between the lower sealing valve plate and the valve core sleeve. The reset springs are used to press the sealing valve plate against the V-shaped inclined opening to maintain a closed state. Horizontal slots are respectively formed on the surfaces of the upper and lower sealing valve plates, and these horizontal slots engage with the water pressure trigger.

[0010] Preferably, the water pressure trigger includes a rear limiting ring, a locking spring, a locking pawl, and a water pressure drive ring. The rear limiting ring is snapped and fixed to the horizontal end of the horizontal section of the loop-shaped slow flow section. The water pressure drive ring is coaxially slidably sleeved on one side of the rear limiting ring, and the end of the horizontal section of the loop-shaped slow flow section forms a circumferential limit on the water pressure drive ring. The locking pawl is horizontally and left-right translationally limited and is set inside the water pressure drive ring. A drive pressure ring is integrally formed and connected to the outer side of the locking pawl. The drive pressure ring is located on the outer side of the water pressure drive ring, and the body of the locking pawl is located in the middle of the inner side of the water pressure drive ring. The locking spring is sleeved between the locking pawl and the rear limiting ring. The locking pawl is engaged with the horizontal slots on the surfaces of the upper and lower sealing valve plates. The inner wall of the water pressure drive ring is provided with a clearance groove that matches the locking pawl. The outer diameter of the locking pawl is equal to the outer diameter of the water pressure drive ring. A locking spring is also provided between the locking pawl and the rear limiting ring. The locking spring is used to apply axial preload to the locking pawl and the water pressure drive ring. The locking claw has integrally formed thin-walled inclined blocks symmetrically arranged on its upper and lower sides. The thin-walled inclined blocks extend inclinedly along the axial direction and are used to form a sliding transmission cooperation with the upper sealing valve plate and the lower sealing valve plate symmetrically arranged.

[0011] Preferably, the front side of the water pressure drive ring is provided with a pressure-bearing groove, the inner diameter of the pressure-bearing groove is smaller than the maximum outer diameter of the water pressure drive ring, the pressure-bearing groove matches the end of the horizontal section of the meandering flow section and together they enclose to form a pressure-bearing chamber, and the wall of the pressure-bearing chamber is provided with a number of drainage micro-holes distributed in an arc shape.

[0012] Preferably, the fire hydrant box is equipped with a fire hose and a high-pressure nozzle, one end of the fire hose is detachably connected to the hose connector, and the other end of the fire hose is detachably connected to the high-pressure nozzle.

[0013] The present invention provides an indoor intelligent rapid emergency fire hydrant with the following effects: 1. By setting up a delayed gradual opening mechanism consisting of a gradually opening valve and a main valve, and configuring a water pressure trigger that works in conjunction with the main valve inside the loop-shaped slow flow section, the main valve is fully opened after a 12-second delay of 30% to 35% pre-charge water flow following the opening of the valve. This design provides a buffer time of approximately 19 to 21 seconds between opening the valve and the water gun firing. During this time, the operator can independently complete a series of actions such as deploying the hose, moving to the vicinity of the fire source, and aiming at the fire source without the need for a second person to assist in operating the valve or holding the water gun. This completely solves the technical problem of traditional fire hydrants requiring two people to operate, making fire emergency response faster and more efficient, especially suitable for emergencies with limited personnel or in the early stages of a fire.

[0014] 2. By using a gradually opening valve, a small pre-filling flow of water (30% to 35% of the total flow) is output after the main valve is opened. This allows the fire hose to slowly fill under low pressure, and the internal pressure of the pipes to rise steadily. This avoids the water hammer phenomenon caused by the sudden impact of water flow on the pipes and hoses when the valve is fully opened instantly, as is common in traditional fire hydrants. This effectively protects the sealing of pipe connections and hose joints. Simultaneously, because the water flow gradually increases, the reaction force of the nozzle increases progressively rather than instantaneously, reducing the recoil force by approximately 70% compared to traditional fire hydrants. This allows a single person to stably hold the nozzle and aim at the fire source, greatly improving operational safety and firefighting efficiency.

[0015] 3. The invention employs a purely mechanical design to achieve delay, triggering, and control functions. All core mechanisms, including the meandering flow channel, involute valve, main valve, and water pressure trigger, rely on water pressure and spring force to operate, requiring no power source, battery, or electronic components. Even under harsh conditions such as high temperatures, humid environments, and power outages at fire scenes, the purely mechanical structure of this invention can maintain normal operation without the risk of electronic component failure, short circuits, or power outages, meeting the stringent requirements for intrinsic safety and high reliability in fire protection equipment.

[0016] 4. The spiral flow channel, involute valve, main valve, and water pressure trigger are all integrated into the pipes inside the fire hydrant box. All delay, triggering, and control mechanisms are integrated with the fire hydrant body, without increasing the box volume, occupying little space, and facilitating installation and daily maintenance in various buildings. At the same time, this invention has good delay adjustment capability. By changing the drainage micro-holes of different diameters or adjusting the length of the flow channel, the output time of the pre-charge water flow and the trigger delay time of the main valve can be flexibly changed to adapt to the personalized needs of different building heights, different water pressure conditions, and different usage scenarios, and has wide versatility and adaptability. Attached Figure Description

[0017] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a structural schematic diagram of an indoor intelligent rapid emergency fire hydrant according to the present invention; Figure 2 This is a schematic diagram of the overall opening structure of the present invention; Figure 3 This is a schematic diagram of the involute valve and main valve structure of the present invention; Figure 4 This is a schematic diagram of the inner core valve and the flow-retarding tube of the present invention. Figure 5 This is a schematic cross-sectional view of the flow-slowing tube of the present invention; Figure 6 This is a detailed structural diagram of the main valve of the present invention; Figure 7 This is a detailed structural diagram of the water pressure trigger of the present invention; Figure 8 This is a schematic diagram of the locking claw structure of the upper sealing valve plate and the lower sealing valve plate of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Fire hydrant box; 11. Water inlet pipe; 111. Switch valve; 12. Ramp section; 121. Hose connector; 13. Fire hose; 14. High-pressure sprinkler head; 2. Incremental opening valve; 21. Outer sleeve valve; 22. Inner core valve; 221. Pressure block; 222. Retractor block; 23. Outlet; 24. Flow control tube; 241. Flow control protrusion; 242. Pressure chamber; 2421. Pressure relief port; 243. Rebound chamber; 25. Return spring; 3. Main valve; 32. Valve body sleeve; 33. Valve core sleeve; 331. Divider plate; 332. Inclined opening; 34. Upper sealing valve plate; 35. Lower sealing valve plate; 36. Return spring; 37. Horizontal groove; 31. Water pressure trigger; 311. Rear limit ring; 312. Locking spring; 313. Locking pawl; 3131. Drive pressure ring; 3132. Thin-walled tilting block; 314. Water pressure drive ring; 3141. Pressure-bearing groove; 3142. Drainage micro-hole; 3143. Clearance groove; 315. Pressure-bearing chamber. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0020] Furthermore, in the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies are not connected through a transitional structure, but rather formed as a whole through a connecting structure. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] Please see Figures 1 to 8 This invention provides an indoor intelligent rapid emergency fire hydrant. The technical solution is as follows: This invention provides an indoor rapid emergency fire hydrant, including a fire hydrant box 1. The box is connected to an external water inlet pipe 11. A switch valve 111 is vertically installed on the water inlet pipe 11. The valve stem of the switch valve 111 faces the outside of the box, which is convenient for the operator to open quickly. The pipe above the switch valve 111 is set into a loop-shaped slow flow section 12. The end of the loop-shaped slow flow section 12 is provided with a hose interface 121 for connecting a fire hose 13 and a high-pressure nozzle 14. The slow-flow section 12 is equipped with an involute valve 2 and a main valve 3, as well as a water pressure trigger 31 that works in conjunction with the main valve 3. The involute valve 2 is used to open after the switch valve 111 is opened for a first preset time (12 seconds) to deliver a pre-filled water flow of 30% to 35% of the total flow into the pipeline. This pre-filled water flow is used to fill the pipeline before the main pipeline water flow is fully open and to prevent the water hose from twisting. The water pressure trigger 31 is used to control the main valve 3 to open after a second preset time (7 to 9 seconds) after detecting that the water pressure in the pipeline has reached a preset threshold, so that the water flow reaches the fully open state.

[0024] Its structure includes: the involute valve 2 consists of an outer sleeve valve 21 and an inner core valve 22. The outer sleeve valve 21 is tightly fitted onto the head of the horizontal section of the meandering flow section 12. The inner core valve 22 is coaxially rotatably fitted onto the inner side of the outer sleeve valve 21. The circumferential walls of the outer sleeve valve 21 and the inner core valve 22 are provided with several elongated outlets 23 (axial waist-shaped holes) in the circumferential direction. The gradually opening valve 2 is also equipped with a slow-flow tube 24. The head of the slow-flow tube 24 is connected to the pipe above the switch valve 111 and is arranged to conform to the curvature of the inner wall of the pipe. The slow-flow tube 24 has several intersecting integrally formed slow-flow protrusions 241 inside to slow down the water flow speed. The tail of the slow-flow tube 24 is provided with a pressure chamber 242 and a rebound chamber 243. A pressure block 221 and a pull-back block 222 are provided on the outer side of the inner core valve 22. The pressure block 221 is slidably sealed in the pressure chamber 242, and the pull-back block 222 is slidably disposed in the spring chamber 243. A pull-back spring 25 is provided in the spring chamber 243. The two ends of the pull-back spring 25 are respectively connected to the inner wall of the pull-back block 222 and the slow-flow pipe 24. A pressure relief port 2421 is provided on one side of the pressure chamber 242. In the initial state, the pressure block 221 blocks the channel inside the slow-flow pipe 24. When water flows through the slow-flow pipe 24 and pushes the pressure block 221 to move against the elastic force of the pull-back spring 25, the inner core valve 22 rotates relative to the outer sleeve valve 21, so that the elongated outlets 23 of the two are connected to each other, and the water flows through the outlet 23 to diffuse outward to the outside of the pipe wall. The main valve 3 consists of a valve body sleeve 32, a valve core sleeve 33, an upper sealing valve plate 34, a lower sealing valve plate 35, and a water pressure trigger 31. The valve body sleeve 32 is coaxially arranged at the end of the loop-shaped slow flow section 12, and the head of the valve body sleeve 32 is fitted inside the inner core valve 22 of the involute valve 2 to transmit the water flow out of the inner core valve 22. The valve core sleeve 33 is tightly fitted inside the valve body sleeve 32. A partition plate 331 is integrally provided in the middle of the valve core sleeve 33. The partition plate 331 divides the inside of the valve core sleeve 33 into two independent upper and lower chambers. The outlet end of the valve core sleeve 33 is provided with a V-shaped inclined opening 332 with symmetrical upper and lower openings. The upper sealing valve plate 34 and the lower sealing valve plate 35 are respectively movably installed on the valve body sleeve 32 and respectively seal with the upper and lower parts of the V-shaped inclined opening 332. Reset springs 36 are symmetrically arranged between the upper sealing valve plate 34 and the valve core sleeve 33, and between the lower sealing valve plate 35 and the valve core sleeve 33. These reset springs 36 are used to press the sealing valve plate on the V-shaped inclined opening 332 to keep it closed. Horizontal slots 37 are respectively opened on the surface of the upper sealing valve plate 34 and the lower sealing valve plate 35. These horizontal slots 37 are matched with the water pressure trigger 31. The water pressure trigger 31 consists of a rear limiting ring 311, a locking spring 312, a locking pawl 313, and a water pressure drive ring 314. The rear limiting ring 311 is snapped and fixed at the end of the horizontal section of the loop-shaped slow flow section 12. The water pressure drive ring 314 is coaxially slidably sleeved on one side of the rear limiting ring 311. The end of the horizontal section of the loop-shaped slow flow section 12 forms a circumferential limit on the water pressure drive ring 314, so that it can only move left and right along the axial direction and cannot rotate. The locking claw 313 is horizontally and left and right, and is limited inside the water pressure drive ring 314. A drive pressure ring 3131 is integrally formed on the outer side of the locking claw 313. The drive pressure ring 3131 is located on the outer side of the water pressure drive ring 314. The body of the locking claw 313 is located in the middle of the inner side of the water pressure drive ring 314. The locking claw 313 is engaged with the horizontal slots 37 opened on the surface of the upper sealing valve plate 34 and the lower sealing valve plate 35. The locking spring 312 is sleeved between the locking claw 313 and the rear limiting ring 311. A pressure-bearing groove 3141 is provided on the front side of the water pressure drive ring 314. The inner diameter of the pressure-bearing groove 3141 is smaller than the maximum outer diameter of the water pressure drive ring 314. The pressure-bearing groove 3141 matches the end of the horizontal section of the loop-shaped slow flow section 12 and together they enclose a pressure-bearing chamber 315. The wall surface of the pressure-bearing chamber 315 is provided with a number of drainage micro-holes 3142 distributed in an arc shape. The upper and lower sides of the locking claw 313 are also symmetrically provided with integrally formed thin-walled inclined blocks 3132. These thin-walled inclined blocks 3132 extend inclinedly along the axial direction, and their inclination angle matches the angle of the V-shaped inclined opening 332, which is used to form a sliding transmission cooperation with the sealing valve plates symmetrically arranged above and below. A locking spring 312 is also provided between the locking claw 313 and the rear limiting ring 311. The locking spring 312 is used to apply axial preload to the locking claw 313 and the rear limiting ring 311. The fire hydrant box 1 is equipped with a fire hose 13 and a high-pressure nozzle 14. One end of the fire hose 13 is detachably connected to the hose interface 121, and the other end of the fire hose 13 is detachably connected to the high-pressure nozzle 14.

[0025] Principle and working process: Step 1: Open the valve When a fire occurs, the operator opens the fire hydrant box door, takes out the fire hose 13 and the high-pressure nozzle 14, connects one end of the fire hose 13 to the hose connector 121, and the other end to the high-pressure nozzle 14. The operator holds the high-pressure nozzle 14 in hand and runs towards the fire source. While running, the operator opens the switch valve 111 (the valve stem faces outward for easy operation). At this time, water flows into the fire hydrant from the external pipe.

[0026] Step 2: Water flows into the slow-flow pipe After the switch valve 111 is opened, most of the water flow (about 95%) flows through the inner core valve 22 to the valve core sleeve 33, and is blocked by the upper sealing valve plate 34 and the lower sealing valve plate 35, and cannot pass through temporarily; the remaining small portion of the water flow (about 5%) enters the slow flow pipe 24. The slow flow pipe 24 is set in a U-shape bend. The water flow first fills the far end in the pipe and then flows back. The slow flow protrusions 241 arranged crosswise inside the pipe wall form a step-by-step obstruction of the water flow, which significantly slows down the water flow speed. This design allows the operator enough time to deploy the water hose and move to the correct position.

[0027] Step 3: The involute valve opens after a delay (approximately 12 seconds). After the water flow is slowed down by the slow-flow pipe 24, it reaches the pressure chamber 242 at the tail end and acts on the pressure block 221. As the water pressure gradually accumulates, the pressure on the pressure block 221 continuously increases. When the water pressure is sufficient to overcome the tension of the return spring 25, the pressure block 221 begins to move, causing the inner core valve 22 to rotate relative to the outer sleeve valve 21. When the inner core valve 22 rotates to a specific angle, the elongated outlets 23 on the inner and outer valve sleeves align and connect with each other. At this time, the pre-charged water flow, accounting for 30% to 35% of the total flow, diffuses from the center of the outer sleeve valve 21 to the outside of the pipe wall and is transported downstream through the annular gap between the outer sleeve valve 21 and the inner wall of the flow channel.

[0028] When the pre-charged water flows downstream, it is divided into two paths: one path passes directly through the middle of the water pressure trigger 31 and continues to be delivered downstream; the other path enters the pressure chamber 315 on the front side of the water pressure trigger 31 for subsequent delayed triggering. The function of this pre-charged water flow is to pre-fill the fire hose 13 with a smaller flow rate and lower pressure, so that the hose can slowly unfold and expel internal air, effectively preventing the hose from twisting or knotting under sudden high pressure. At the same time, the smaller flow rate also greatly reduces the recoil of the water gun, making it easy for a single person to hold.

[0029] Step 4: Accumulate pressure using the water pressure trigger (approximately 7 to 9 seconds) The pre-filled water entering the pressure chamber 315 experiences a gradual increase in water pressure when the inflow rate exceeds the drainage capacity of the micro-holes 3142 on the wall of the pressure chamber 315. This "fast inflow, slow drainage" design achieves a delayed triggering function. As the water pressure in the pressure chamber 315 continues to rise, the water pressure drive ring 314 moves backward under the action of water pressure, overcoming the elastic force of the locking spring 312, preparing for the next step of unlocking and opening the main valve.

[0030] Step 5: Unlock and open the main valve As the water pressure in the pressure chamber 315 continues to rise, the water pressure drive ring 314 moves backward against the elastic force of the locking spring 312 under the action of water pressure. The water pressure drive ring 314 drives the locking claw 313 to move synchronously, so that the locking claw 313 disengages from the horizontal groove 37 of the upper sealing valve plate 34 and the lower sealing valve plate 35. After the locking claw 313 disengages, the upper sealing valve plate 34 and the lower sealing valve plate 35 slide open along the inclined surface of the V-shaped inclined opening 332 under the action of water pressure, overcoming the elastic force of the return spring 36. At the same time, the thin-walled inclined blocks 3132 on the upper and lower sides of the locking claw 313 form a sliding transmission cooperation with the sealing valve plate, pushing the sealing valve plate to open smoothly. Water flows through the V-shaped inclined opening 332 and is fully open, realizing the fully open state of the main valve 3.

[0031] Step 6: Full-flow fire suppression At this point, water is sprayed out at full flow from high-pressure nozzle 14, allowing the operator to aim at the fire source and begin extinguishing. Throughout the process, there is a buffer time of approximately 19 to 21 seconds between opening the valve and the water gun firing (12-second pre-charge delay + 7 to 9-second trigger delay). During this time, the operator has ample time to deploy the hose, reposition, and aim. When the water gun finally fires, the water flow gradually increases, without sudden recoil, allowing a single person to stably hold the gun and extinguish the fire.

[0032] Step 7: Close after use After the fire is extinguished, the operator closes the switch valve 111 to cut off the water supply. The reset springs 36 and locking springs 312 in each valve automatically reset each component to the initial closed state, ready for the next use.

[0033] The locking principle of the latching claw: The horizontal grooves 37 on the surfaces of the upper sealing valve plate 34 and the lower sealing valve plate 35 extend horizontally. The latching claw 313 is engaged in the horizontal grooves 37. When the pre-filled water is transported downstream, the water pressure acts on the back of the upper sealing valve plate 34 and the lower sealing valve plate 35, generating a thrust in the opening direction. The direction of this thrust is oblique to the opening direction along the inclined surface of the V-shaped inclined opening 332. The latching direction of the latching claw 313 is horizontal and perpendicular to the opening thrust direction of the sealing valve plate. Therefore, no matter how much the water pressure increases, the water flow impact force generated by the sealing valve plate cannot make the latching claw 313 move backward. Only the active unlocking of the water pressure trigger 31 can make the latching claw 313 disengage, thus ensuring that the main valve 3 remains locked during the pre-filled water stage and will not be accidentally opened due to water flow impact.

[0034] Self-resetting principle: When the switch valve 111 is closed, the water source is cut off, and the water pressure inside the pipeline gradually decreases. At this time, the pressure chamber 315 inside the water pressure trigger 31 drops sharply due to the loss of continuous water supply. The locking spring 312 pushes the locking claw 313 and the water pressure drive ring 314 to move forward and reset, so that the locking claw 313 is in the ready-to-engage position. Then the water pressure on the upper sealing valve plate 34 and the lower sealing valve plate 35 inside the main valve 3 disappears. Under the elastic force of the reset spring 36, the upper sealing valve plate 34 and the lower sealing valve plate 35 slide and reset along the inclined surface of the V-shaped inclined opening 332 and move in the closing direction. During the resetting process of the sealing valve plate, the sealing valve plate and the thin-walled inclined block 3132 on the locking pawl 313 form a sliding contact. Since the thin-walled inclined block 3132 is inclined, when the sealing valve plate closes, it pushes the thin-walled inclined block 3132, causing the locking pawl 313 to overcome the elastic force of the locking spring 312 and generate a small rearward clearance displacement, thereby making room for the sealing valve plate to close and preventing the locking pawl 313 from rigidly jamming with the sealing valve plate. It should be noted that during this process, the water pressure drive ring 314 remains stationary, and only the locking pawl 313 moves backward alone. This is because the locking pawl 313 and the water pressure drive ring 314 have a horizontal translational limiting fit. The locking pawl 313 has a certain independent movement margin inside it through the clearance groove 3143. Therefore, the locking spring 312 only acts on the locking pawl 313 at this time, providing it with the elastic force required for resetting and clearance. After the sealing valve plate is fully reset and closed, the locking spring 312 activates again, pushing the locking claw 313 forward to accurately engage in the horizontal slot 37 of the sealing valve plate, thus locking the main valve 3. In this way, the locking spring 312 performs different functions in two stages: in the first stage, it pushes the locking claw 313 and the water pressure drive ring 314 forward to reset as a whole; in the second stage, it allows the locking claw 313 to move backward independently when the sealing valve plate is closed, and then pushes it back to the engaged position after the movement is complete. Regarding the involute valve 2, the water pressure in the pressure chamber 242 at the tail of the slow-flow pipe 24 disappears, and the return spring 25 pulls the return block 222 to rotate axially in the opposite direction, causing the inner core valve 22 to rotate back to its initial position, causing the inner core valve 22 to close in a staggered manner with the elongated outlet 23 on the outer sleeve valve 21. The entire device automatically returns to its initial standby state under no water pressure by relying on the preload of each spring, without manual intervention, thus preparing for the next emergency use.

[0035] The above description only outlines the basic principles and preferred embodiments of the present invention. Those skilled in the art can make many changes and modifications based on the above description, and these changes and modifications should fall within the protection scope of the present invention.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An indoor intelligent rapid emergency fire hydrant, comprising a fire hydrant box (1), wherein the fire hydrant box (1) is internally connected to a water inlet pipe (11) accessed from the outside, characterized in that: A switch valve (111) is vertically installed on the water inlet pipe (11). The valve stem of the switch valve (111) faces the outside of the box. A loop-shaped slow flow section (12) is installed on the pipe above the switch valve (111). A water hose interface (121) is installed at the end of the loop-shaped slow flow section (12). An involute valve (2) and a main valve (3) are installed inside the loop-shaped slow flow section (12), as well as a water pressure trigger (31) that cooperates with the main valve (3). The gradually opening valve (2) is used to open after a first preset time after the opening of the switch valve (111) to deliver a pre-filled water flow of 30%-35% of the total flow rate into the loop-shaped slow flow section (12). The water pressure trigger (31) is used to control the main valve (3) to open after a second preset time after detecting that the water pressure in the loop-shaped slow flow section (12) has reached a preset threshold, so that the water flow reaches the fully open state. The first preset time is 12 seconds and the second preset time is 7 to 9 seconds. The gradually opening valve (2) includes an outer sleeve valve (21) and an inner core valve (22). The outer sleeve valve (21) is tightly fitted onto the head of the horizontal section of the meandering section (12). The inner core valve (22) is coaxially rotated and fitted onto the inner side of the outer sleeve valve (21). The circumferential walls of the outer sleeve valve (21) and the inner core valve (22) are provided with several elongated outlets (23) in the circumferential direction. The gradually opening valve (2) also includes a slow-flow pipe (24). The head of the slow-flow pipe (24) is connected to the pipe on the outlet side of the switch valve (111). The slow-flow pipe (24) is arranged to conform to the curvature of the inner wall of the pipe. The slow-flow pipe (24) has several intersecting and integrally formed slow-flow protrusions (241) inside. The tail of the slow-flow pipe (24) is provided with a pressure chamber (242) and a rebound chamber (243). The inner core valve (22) is provided with a pressure block (221) and a pull-back block (222) on its axial outer side. The pressure block (221) is slidably sealed in the pressure chamber (242), and the pull-back block (222) is slidably disposed in the spring-loaded chamber (243). A pull-back spring (25) is provided in the spring-loaded chamber (243). The two ends of the pull-back spring (25) are respectively connected to the inner wall of the pull-back block (222) and the slow-flow tube (24). A pressure relief port (2421) is provided on one side of the pressure chamber (242). The fire hydrant box (1) is equipped with a fire hose (13) and a high-pressure nozzle (14). One end of the fire hose (13) is detachably connected to the hose interface (121), and the other end of the fire hose (13) is detachably connected to the high-pressure nozzle (14).

2. The indoor intelligent rapid emergency fire hydrant according to claim 1, characterized in that: The slow-flow pipe (24) is arranged in a U-shape. The water flow first fills the far end in the slow-flow pipe (24) and then flows back. After being blocked by several slow-flow protrusions (241), the flow velocity is gradually reduced to achieve a time delay for the water flow to reach the pressure chamber (242). The outer diameter of the outer valve (21) is smaller than the inner diameter of the pipe of the U-shape slow-flow section (12), so that the water flowing out of the outlet (23) passes through the annular gap between the outer valve (21) and the inner wall of the pipe.

3. The indoor intelligent rapid emergency fire hydrant according to claim 2, characterized in that: The main valve (3) includes a valve body sleeve (32), a valve core sleeve (33), an upper sealing valve plate (34), and a lower sealing valve plate (35). The valve body sleeve (32) is coaxially arranged in the middle of the horizontal section of the loop-shaped slow flow section (12), and the head of the valve body sleeve (32) is sleeved inside the inner core valve (22) of the involute valve (2) for transmitting the water flow out of the inner core valve (22). The valve core sleeve (33) is tightly sleeved inside the valve body sleeve (32). A partition plate (331) is integrally provided in the middle of the valve core sleeve (33). The partition plate (331) divides the inside of the valve core sleeve (33) into two independent chambers. The outlet end of the valve core sleeve (33) is provided with a V-shaped inclined opening (332) with symmetrical upper and lower sides. The upper sealing valve plate (34) and the lower sealing valve plate (35) are respectively movably installed on the valve body sleeve (32) and respectively seal and cooperate with the upper and lower parts of the V-shaped inclined opening (332). Reset springs (36) are symmetrically arranged between the upper sealing valve plate (34) and the valve core sleeve (33) and between the lower sealing valve plate (35) and the valve core sleeve (33). The reset springs (36) are used to press the sealing valve plate on the V-shaped inclined opening (332) to keep it closed. The surfaces of the upper sealing valve plate (34) and the lower sealing valve plate (35) are respectively provided with horizontal slots (37). The horizontal slots (37) are matched with the water pressure trigger (31).

4. The indoor intelligent rapid emergency fire hydrant according to claim 3, characterized in that: The water pressure trigger (31) includes a rear limiting ring (311), a locking spring (312), a locking pawl (313), and a water pressure drive ring (314). The rear limiting ring (311) is snapped and fixed to the horizontal end of the horizontal section of the loop-shaped slow flow section (12). The water pressure drive ring (314) is coaxially slidably sleeved on one side of the rear limiting ring (311), and the end of the horizontal section of the loop-shaped slow flow section (12) forms a circumferential limit on the water pressure drive ring (314). The locking pawl (313) is disposed inside the water pressure drive ring (314). The outer side of the locking pawl (313) is integrally connected to a drive pressure ring (3131). The drive pressure ring (3131) is located outside the water pressure drive ring (314). The body of the locking pawl (313) is located in the middle of the inner side of the water pressure drive ring (314). The locking spring (312) is sleeved between the locking claw (313) and the rear limiting ring (311). The locking claw (313) is engaged with the horizontal slots (37) opened on the surfaces of the upper and lower sealing valve plates. The locking spring (312) applies axial preload to the locking claw (313) and the water pressure drive ring (314) with the rear limiting ring (311) as a fixed support. The locking claw (313) has integrally formed thin-walled inclined blocks (3132) symmetrically arranged on the upper and lower sides. The thin-walled inclined blocks (3132) extend inclinedly along the axial direction and are used to form a sliding transmission cooperation with the upper sealing valve plate (34) and the lower sealing valve plate (35) symmetrically arranged.

5. The indoor intelligent rapid emergency fire hydrant according to claim 4, characterized in that: The front side of the water pressure drive ring (314) is provided with a pressure-bearing groove (3141). The inner diameter of the pressure-bearing groove (3141) is smaller than the maximum outer diameter of the water pressure drive ring (314). The pressure-bearing groove (3141) matches the end of the horizontal section of the meandering flow section (12) and together they enclose a pressure-bearing chamber (315). The wall of the pressure-bearing chamber (315) is provided with a number of drainage micro-holes (3142) distributed in an arc shape.

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