A water pressure adjustable fire hydrant and a water pressure adjusting system

Abstract

The application discloses a water pressure adjustable fire hydrant and a water pressure adjusting system, and relates to the technical field of fire hydrants. The water pressure adjustable fire hydrant comprises a hydrant body and an adjusting mechanism installed on the outer wall of the hydrant body, and a top cover and a mounting plate are respectively installed on the top and bottom of the hydrant body. The maximum distance of the upward displacement of the main block can be adjusted through the telescopic assembly, and the pressure change can be controlled. The main block can be moved up and down through the telescopic assembly, and the pressure change can be actively controlled through the connecting assembly. The pressure adjustment control can be double-regulated through the double mode, so that the water pressure can be maintained in the set range. The pressure increasing and reducing operations can be further assisted through the pressure increasing auxiliary mechanism and the pressure reducing auxiliary mechanism, the efficiency of the water pressure control can be improved through the further assistance operation, and the response lag, poor pressure linearity and difficulty in accurately maintaining the water pressure in the set range in the high-load and rapid change scenarios can be reduced.

Description

Technical Field

[0001] This invention relates to the field of fire hydrant technology, specifically to a fire hydrant with adjustable water pressure and a water pressure regulating system. Background Technology

[0002] A fire hydrant (also known as a fire hose) is a water supply fire-fighting device installed in urban pipe networks or building water supply systems. It is used to quickly connect a large amount of water to the fire scene to extinguish the fire. Modern fire hydrants are also often equipped with pressure sensors, remote alarms, and control systems that are linked with fire-fighting facilities to improve the efficiency of monitoring, maintenance, and emergency response.

[0003] Patent publication number CN111346332A discloses a fire hydrant with adjustable caliber and pressure. The fire hydrant includes a fire hose and a nozzle. One end of the fire hose has a nozzle interface. The nozzle includes a connector and a first adjusting head. One end of the connector is connected to the nozzle interface, and the other end of the connector is rotatably connected to one end of the first adjusting head. The inner surface of the connector has a radially arranged first baffle, and the inner surface of the first adjusting head has a second baffle corresponding to the first baffle. By using the fire hydrant with adjustable caliber and pressure, the other end of the connector and the first adjusting head are rotatably connected. During the rotation of the connector and the first adjusting head, the positions of the first and second baffles will change, either overlapping or separating, thereby controlling the water flow and pressure of the fire hydrant.

[0004] In existing technologies, pressure regulation often relies on a single valve core or a simple bypass for control, resulting in sluggish response and poor pressure linearity in high-load, rapidly changing scenarios. It is difficult to accurately maintain the outlet water pressure within the set range, such as in high-rise building fire water supply and underground garages where rapid response and stable pressure are required. These drawbacks are particularly evident because pressure fluctuations caused by sudden load changes and pump start-up and shutdown often exceed the regulation capacity of a single valve, leading to rapid pressure drops, accelerated valve wear, and potential impacts on the pipeline network and fire extinguishing effectiveness. Therefore, this invention is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a fire hydrant with adjustable water pressure and a water pressure regulating system to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fire hydrant with adjustable water pressure, comprising a hydrant body and an adjusting mechanism installed on the outer wall of the hydrant body. A top cover and a mounting plate are respectively installed at the top and bottom of the hydrant body. A plurality of hydrant ports are installed on the outer wall of the hydrant body. A valve plate assembly for controlling the water flow from the hydrant ports is installed on the inner wall of the hydrant body. The adjusting mechanism includes a plurality of L-shaped tubes installed on the outer wall of the hydrant body. The L-shaped tubes are located at the bottom of the valve plate assembly. Vertical grooves are formed at both ends of the top outer wall of the L-shaped tubes. Side blocks are inserted into the vertical grooves, and round blocks are installed between the side blocks. The top of the round blocks... A telescopic assembly is installed on the wall. A bottom block is installed at one end of the piston rod of the telescopic assembly. Limit blocks are installed on both sides of the inner wall of the L-shaped tube. A main block is placed on the limit block. A filling assembly is installed on the outer wall of the main block. The main block is filled by the filling assembly to achieve a fit with the inner wall of the L-shaped tube. A connecting assembly is installed between the bottom block and the main block. The telescopic assembly drives the main block to move through the connecting assembly. A pressure boosting auxiliary mechanism communicating with the L-shaped tube is installed on the outer wall of the plug. A pressure reducing auxiliary mechanism is installed on the pressure boosting auxiliary mechanism. Pressure adjustment is achieved by the pressure boosting auxiliary mechanism working in conjunction with the pressure reducing auxiliary mechanism.

[0007] Furthermore, several springs are installed on the bottom outer wall of the circular block, and a ring is installed on the bottom outer wall of each spring. Several positioning rods located in the springs are installed on the top outer wall of the main block. Several circular grooves are opened on the top outer wall of the circular block, and the positioning rods are inserted into the circular grooves. A detachable circular cover is installed on the top outer wall of the L-shaped tube, and a buffer pad is installed on the bottom outer wall of the circular cover.

[0008] Furthermore, the filling component includes a slot formed on the outer wall of the main block, in which a filling airbag is installed. A rubber ring is fitted onto the outer wall of the main block, and the filling airbag is located inside the rubber ring. A first air ring communicating with the filling airbag is installed on the top outer wall of the main block. A connecting hose is installed on the first air ring, and an air valve is installed on the connecting hose.

[0009] Furthermore, the connecting assembly includes a bottom groove formed on the bottom outer wall of the base block, a sealing gasket installed on the bottom outer wall of the base block, a groove plate driven by a drive motor installed on the inner wall of the bottom groove, and locking blocks installed at both ends of the top outer wall of the main block, so that the groove plate can move in and out of the locking blocks by rotating the groove plate.

[0010] Furthermore, the pressurization auxiliary mechanism includes a second air ring installed on the outer wall of the plug body. Several inflation components are installed on the bottom outer wall of the second air ring, and several exhaust pipes are installed on the top outer wall of the second air ring. A horizontal pipe is installed on the exhaust pipe, a valve is installed on the horizontal pipe, and an auxiliary box that fits with the L-shaped pipe is installed on the horizontal pipe. The auxiliary box communicates with the L-shaped pipe, and a connecting hose is connected to the exhaust pipe.

[0011] Furthermore, the pressure relief auxiliary mechanism includes several auxiliary tubes installed between the auxiliary box and the plug body, with the connection between the auxiliary tubes and the plug body located at the top of the valve plate assembly.

[0012] Furthermore, the valve plate assembly includes a vertical ring mounted on the top cover, a liftable vertical rod installed in the vertical ring, a valve plate body provided on the bottom outer wall of the vertical rod, a fixing ring installed on the inner wall of the bolt, and the valve plate body inserted into the fixing ring.

[0013] An adjustable fire hydrant water pressure regulation system, using the aforementioned adjustable fire hydrant, includes: adjusting the position of the main block, recording pressure changes to obtain initial position information and initial pressure change values; establishing a correlation between position information and pressure change values; recording the relationship between auxiliary pipe drainage time and auxiliary box air intake time and water pressure changes to obtain basic position information and basic pressure change values; establishing a correspondence between basic position information and basic pressure change values; integrating position information, pressure change values, correlation, basic position information, basic pressure change values, and correspondence to obtain a control catalog; acquiring user requirements; obtaining regulation information based on user requirements and the control catalog; and controlling the regulation mechanism to complete water pressure regulation based on the regulation information.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] This adjustable fire hydrant and water pressure regulation system can control pressure changes by adjusting the maximum upward displacement of the main block through a telescopic component. A connecting component allows for the vertical movement of the main block, actively controlling pressure changes. This dual-mode pressure regulation maintains the water pressure within a set range. Additional pressure-boosting and pressure-reducing mechanisms further assist in these operations. Specifically, pressure boosting involves air inflation, and pressure reduction involves draining water. These auxiliary mechanisms improve water pressure control efficiency and reduce issues such as response lag, poor pressure linearity, and difficulty in accurately maintaining the outlet water pressure within the set range under high load and rapid pressure changes.

[0016] Meanwhile, the rubber ring can be partially embedded in the outer wall of the main block during installation. This means the rubber ring has tensile redundancy. By expanding the air bladder, the rubber ring can be stretched, thereby improving the sealing performance, reducing the possibility of water leakage affecting pressure regulation due to rubber fatigue, reducing the probability of needing to replace the rubber ring, extending its service life, and avoiding frequent replacements due to prolonged friction. When pressurization is required, the pressurization operation can be completed through the reciprocating movement of the main block and the continuous delivery of gas. When depressurization is required, the main block moves to the top of the auxiliary box, and water is guided to the top of the valve plate body through the auxiliary pipe in a multi-channel manner, reducing impact and pressure.

[0017] Meanwhile, the maximum upward displacement of the main block can be adjusted by the telescopic component. By controlling the amount of water entering the L-shaped pipe, the pressure change can be controlled. The main block can be reset by the action of the spring, allowing for active displacement when the connecting component does not allow it. The telescopic component can be protected by the buffer pad. The telescopic component can be a hydraulic cylinder or an electric push rod, etc. By adjusting the system settings, information matching can be performed according to the requirements to quickly respond to different pressure demands. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of the tether body of the present invention;

[0020] Figure 3 This is a schematic diagram of the main structure of the adjustment mechanism of the present invention;

[0021] Figure 4 This is a schematic diagram of the bottom structure of the circular block of the present invention;

[0022] Figure 5 This is a schematic diagram of the top structure of the main block of the present invention;

[0023] Figure 6 This is a schematic diagram of the external structure of the main block of the present invention;

[0024] Figure 7 This is a schematic diagram of the bottom structure of the base block of the present invention.

[0025] In the diagram: 1. Bolt body; 2. Adjustment mechanism; 201. L-shaped tube; 202. Limiting block; 203. Round block; 204. Side block; 205. Telescopic component; 206. Round cover; 207. Connecting hose; 208. Positioning rod; 209. Spring; 210. First air ring; 211. Bottom block; 212. Rubber ring; 213. Sealing gasket; 214. Main block; 215. Locking block; 216. Filling airbag; 217. Groove plate; 218. Circular ring; 3. Bolt port; 4. Top cover; 5. Pressure reducing auxiliary mechanism; 501. Auxiliary tube; 6. Pressure increasing auxiliary mechanism; 601. Second air ring; 602. Inflation component; 603. Exhaust pipe; 604. Horizontal tube; 605. Auxiliary box; 7. Mounting plate; 8. Valve plate body; 9. Vertical ring; 10. Vertical rod; 11. Fixing ring. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] To ensure stable and compliant water supply and rapid response in different scenarios: In standby mode, low energy consumption and low pressure are maintained to reduce pipe network wear; when sprinklers or fire hydrants are simultaneously activated, the outlet water pressure and flow rate are adjusted to ensure sufficient fire-fighting water supply without damaging the pipe network due to pressure; in the face of main water source pressure fluctuations or parallel water demand, closed-loop control can quickly compensate for pressure, preventing sudden pressure drops from affecting fire-fighting effectiveness. Simultaneously, the adjustable pressure design also has redundancy and fault diagnosis capabilities, facilitating maintenance, monitoring, and remote alarms, thereby improving the reliability and emergency response efficiency of the entire fire water supply system.

[0028] like Figures 1-7 As shown, the present invention provides a technical solution: a fire hydrant with adjustable water pressure, comprising a hydrant body 1 and an adjusting mechanism 2 installed on the outer wall of the hydrant body 1. A top cover 4 and a mounting plate 7 are respectively installed at the top and bottom of the hydrant body 1. A plurality of hydrant ports 3 are installed on the outer wall of the hydrant body 1. A valve plate assembly for controlling the water flow from the hydrant ports 3 is installed on the inner wall of the hydrant body 1. The adjusting mechanism 2 includes a plurality of L-shaped tubes 201 installed on the outer wall of the hydrant body 1. The L-shaped tubes 201 are located at the bottom of the valve plate assembly. Vertical grooves are formed at both ends of the top outer wall of the L-shaped tubes 201. Side blocks 204 are inserted into the vertical grooves. Circular blocks 203 are installed between the side blocks 204. A telescopic component 205 is installed on the top outer wall of the circular block 203. A base block 211 is installed at one end of the piston rod of the telescopic component 205. Limiting blocks 202 are installed on both sides of the inner wall of the L-shaped tube 201. A main block 214 is placed on the limiting block 202. A filling component is installed on the outer wall of the main block 214. The main block 214 is filled with the filling component to achieve a fit with the inner wall of the L-shaped tube 201. A connecting component is installed between the base block 211 and the main block 214. The telescopic component 205 drives the main block 214 to move through the connecting component. A pressurizing auxiliary mechanism 6 communicating with the L-shaped tube 201 is installed on the outer wall of the plug body 1. A depressurizing auxiliary mechanism 5 is installed on the pressurizing auxiliary mechanism 6. The pressure is assisted and adjusted by the pressurizing auxiliary mechanism 6 and the depressurizing auxiliary mechanism 5.

[0029] It should be noted that during use, the hydrant body 1 can be installed on the water inlet pipe via the mounting plate 7, and the fire extinguishing equipment can be connected to the hydrant port 3 for water dispensing. The water dispensing can be controlled via the valve plate assembly. The maximum upward displacement of the main block 214 can be adjusted via the telescopic component 205, thereby controlling the amount of water entering the L-shaped pipe 201 and thus controlling pressure changes. The main block 214 can be moved up and down via the telescopic component 205 through the connecting component, actively controlling pressure changes. This dual-mode pressure regulation control maintains the water pressure within the set range. The filling component fills the main block 214, ensuring it fits snugly against the L-shaped pipe 201, improving sealing and reducing the probability of water overflow, thus improving pressure control efficiency. The pressure boosting auxiliary mechanism 6 and pressure reducing auxiliary mechanism 5 further assist in pressure boosting and depressurization operations. Specifically, the pressure boosting operation involves air inflation, and the pressure reducing operation involves draining water. These auxiliary operations further improve water pressure control efficiency and reduce the occurrence of pressure problems under high loads. In scenarios with rapidly changing loads, response lag, poor pressure linearity, and difficulty in accurately maintaining the outlet water pressure within the set range, during actual use, water pressure adjustment is initially achieved by extending one end of the piston rod of the telescopic component 205 to control the upward movement of the main block 214. Simultaneously, the position of the main block 214 is actively adjusted by the connecting component to further control the water pressure. During further adjustment, the pressurization auxiliary mechanism 6 and the depressurization auxiliary mechanism 5 are used for pressurization and depressurization operations. Specifically, air is inflated in conjunction with the up-and-down movement of the telescopic component 205 to perform a pumping motion to increase pressure, while depressurization is a flow guiding operation. The limiting block 202 is used to limit the maximum downward movement of the main block 214. The vertical groove and side block 204 facilitate the positioning and installation of the round block 203 by the staff. In addition, a corresponding pressure sensor can be installed inside the hydrant body 1 to monitor the pressure. At the same time, a liquid level sensor can be installed on the inner wall of the hydrant body 1 at the top of the valve plate assembly to determine whether the valve plate assembly is leaking, so that the staff can carry out emergency repairs when leaks are found to avoid affecting the use of the fire hydrant.

[0030] like Figure 4 and Figure 5 As shown, several springs 209 are installed on the bottom outer wall of the circular block 203, and a ring 218 is installed on the bottom outer wall of each spring 209. Several positioning rods 208 located in the springs 209 are installed on the top outer wall of the main block 214. Several circular grooves are opened on the top outer wall of the circular block 203, and the positioning rods 208 are inserted into the circular grooves. A detachable circular cover 206 is installed on the top outer wall of the L-shaped tube 201, and a buffer pad is installed on the bottom outer wall of the circular cover 206.

[0031] It should be noted that during actual use, the spring 209 enables the main block 214 to have a reset effect, allowing for active displacement when the connecting components do not permit it. The buffer pad protects the telescopic component 205, which can be a hydraulic cylinder or an electric push rod. In actual use, power needs to be supplied to the electrical components in the fire hydrant. The positioning rod 208 and the circular groove enable the main block 214 to move vertically. The detachable circular cover 206 allows the main block 214 and the telescopic component 205 to be easily disassembled, facilitating self-maintenance or replacement according to actual use. The circular cover 206 can be installed using bolt connections, etc.

[0032] like Figures 4-6 As shown, the filling component includes a slot on the outer wall of the main block 214, in which a filling airbag 216 is installed. A rubber ring 212 is fitted onto the outer wall of the main block 214, and the filling airbag 216 is located inside the rubber ring 212. A first air ring 210 communicating with the filling airbag 216 is installed on the top outer wall of the main block 214. A connecting hose 207 is installed on the first air ring 210, and an air valve is installed on the connecting hose 207.

[0033] It should be noted that the rubber ring 212 can be partially embedded in the outer wall of the main block 214 during installation. That is, the rubber ring 212 has tensile redundancy. By expanding the air bladder 216, the rubber ring 212 can be stretched, thereby improving the sealing performance, reducing the possibility of water leakage affecting pressure regulation due to rubber fatigue, reducing the probability of needing to replace the rubber ring 212, extending its service life, and avoiding frequent replacement due to the reduced service life of the rubber ring 212 caused by long-term friction. In order to facilitate the disassembly of the main block 214, a quick-release connector can also be installed on the first air ring 210 to connect with the connecting hose 207 for quick disassembly operation. The reason why the connecting hose 207 is a hose is that the main block 214 needs to move up and down.

[0034] like Figure 6 and Figure 7 As shown, the connecting assembly includes a bottom groove formed on the bottom outer wall of the bottom block 211, a sealing gasket 213 installed on the bottom outer wall of the bottom block 211, a groove plate 217 driven by a drive motor installed on the inner wall of the bottom groove, and a locking block 215 installed at both ends of the top outer wall of the main block 214. The groove plate 217 moves in and out of the locking block 215 by rotating the groove plate 217.

[0035] It should be noted that when the connecting component is needed, the drive motor is started to rotate the slot plate 217, so that the slot plate 217 enters the locking block 215. Then, the telescopic component 205 is started to drive the main block 214 to move up and down normally. The normal up and down movement is coordinated with the subsequent pressurization auxiliary mechanism 6 and depressurization auxiliary mechanism 5 to assist in pressurization and depressurization.

[0036] like Figure 2 and Figure 3 As shown, the booster auxiliary mechanism 6 includes a second air ring 601 installed on the outer wall of the plug body 1. Several inflation components 602 are installed on the bottom outer wall of the second air ring 601, and several exhaust pipes 603 are installed on the top outer wall of the second air ring 601. A horizontal pipe 604 is installed on the exhaust pipe 603, a valve is installed on the horizontal pipe 604, and an auxiliary box 605 that fits against the L-shaped pipe 201 is installed on the horizontal pipe 604. The auxiliary box 605 communicates with the L-shaped pipe 201, and a connecting hose 207 is connected to the exhaust pipe 603.

[0037] It should be noted that when the pressurization auxiliary mechanism 6 is used, the gas is filled into the second gas ring 601 by activating the gas filling component 602, and then the gas is delivered to the horizontal pipe 604 and the auxiliary box 605 through the exhaust pipe 603. When pressurization is required, the pressurization operation can be completed by the reciprocating operation of the main block 214 and the continuous delivery of gas. The specific gas delivery volume is determined according to the actual pressurization.

[0038] like Figure 3 As shown, the pressure reducing auxiliary mechanism 5 includes several auxiliary pipes 501 installed between the auxiliary box 605 and the valve body 1, and the connection between the auxiliary pipes 501 and the valve body 1 is located at the top of the valve plate assembly.

[0039] It should be noted that when pressure reduction is required, the main block 214 is moved to the top of the auxiliary box 605, and the water is diverted to the top of the valve plate body 8 through the auxiliary pipe 501 in a multi-channel manner to reduce the impact force and pressure.

[0040] like Figure 2 As shown, the valve plate assembly includes a vertical ring 9 mounted on the top cover 4, a liftable vertical rod 10 mounted in the vertical ring 9, a valve plate body 8 provided on the bottom outer wall of the vertical rod 10, a fixing ring 11 mounted on the inner wall of the bolt body 1, and the valve plate body 8 inserted into the fixing ring 11.

[0041] It should be noted that the vertical rod 10 can be raised and lowered. It can be operated by using a threaded rod with a threaded groove, or it can be driven by electric components such as a hydraulic cylinder. Water can be discharged by adjusting the valve plate body 8 until it is removed from the fixing ring 11.

[0042] The position of the main block 214 is adjusted to record pressure changes to obtain initial position information and initial pressure change values. The correlation between position information and pressure change values ​​is established. The relationship between the drainage time of auxiliary pipe 501 and air intake time of auxiliary box 605 and water pressure changes is recorded to obtain basic position information and basic pressure change values. The correspondence between basic position information and basic pressure change values ​​is established. The position information, pressure change values, correlation, basic position information, basic pressure change values ​​and correspondence are integrated to obtain the control catalog. User needs are obtained. Based on user needs and the control catalog, adjustment information is obtained. Based on the adjustment information, the adjustment mechanism 2 is controlled to complete water pressure adjustment.

[0043] It is important to note that the process of adjusting the position of the main block 214 and recording pressure changes to obtain initial position information and initial pressure change values ​​involves adjusting the pressure changes of the main block 214 at each position in the L-shaped pipe 201, recording the distance the main block 214 moves and the pressure changes to obtain initial position information and initial pressure change values. Specifically, this requires conducting pressure tests under the same water pressure, and recording the relationship between the drainage time of the auxiliary pipe 501 and the air intake time of the auxiliary box 605 and the water pressure changes to obtain basic position information and basic pressure change values. This process involves recording the drainage and air intake times through the auxiliary pipe 501 and the auxiliary box 605. The auxiliary box 605 obtains basic position information and basic pressure change value by changing the pressure through air intake. The basic position information is the duration of drainage by the auxiliary pipe 501 and the time of air intake by the auxiliary box 605. The specific air intake and drainage volume need to be consistent. The subsequent process of controlling water pressure adjustment according to user needs is the information matching process. That is, based on the difference between the water pressure required by the user and the actual water pressure, the corresponding water pressure deviation value is found. The adjustment information is obtained based on the correspondence and correlation in the adjustment information. By adjusting the system settings, information matching can be performed according to the needs to quickly respond to different pressure requirements.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A fire hydrant with adjustable water pressure, characterized in that, The device includes a plug body (1) and an adjustment mechanism (2) installed on the outer wall of the plug body (1). The top and bottom of the plug body (1) are respectively equipped with a top cover (4) and a mounting plate (7). Several plug ports (3) are installed on the outer wall of the plug body (1). A valve plate assembly for controlling the water flow of the plug ports (3) is installed on the inner wall of the plug body (1). The adjustment mechanism (2) includes several L-shaped tubes (201) installed on the outer wall of the plug body (1). The L-shaped tubes (201) are located at the bottom of the valve plate assembly. Vertical grooves are opened at both ends of the top outer wall of the L-shaped tubes (201). Side blocks (204) are inserted into the vertical grooves. Circular blocks (203) are installed between the side blocks (204). Telescopic components (205) are installed on the top outer wall of the circular blocks (203). The piston of the telescopic components (205) A bottom block (211) is installed at one end of the rod. Limiting blocks (202) are installed on both sides of the inner wall of the L-shaped tube (201). A main block (214) is placed on the limiting block (202). A filling component is installed on the outer wall of the main block (214). The main block (214) is filled with the filling component to achieve contact with the inner wall of the L-shaped tube (201). A connecting component is installed between the bottom block (211) and the main block (214). The telescopic component (205) is used to drive the main block (214) to move through the connecting component. A pressure boosting auxiliary mechanism (6) communicating with the L-shaped tube (201) is installed on the outer wall of the nut body (1). A pressure reducing auxiliary mechanism (5) is installed on the pressure boosting auxiliary mechanism (6). Pressure adjustment is achieved by the pressure boosting auxiliary mechanism (6) cooperating with the pressure reducing auxiliary mechanism (5). The booster auxiliary mechanism (6) includes a second air ring (601) installed on the outer wall of the plug body (1), a plurality of air-filling components (602) installed on the bottom outer wall of the second air ring (601), a plurality of exhaust pipes (603) installed on the top outer wall of the second air ring (601), a horizontal pipe (604) installed on the exhaust pipe (603), a valve installed on the horizontal pipe (604), an auxiliary box (605) fitted to the L-shaped pipe (201) installed on the horizontal pipe (604), the auxiliary box (605) communicating with the L-shaped pipe (201), and a connecting hose (207) connected to the exhaust pipe (603); The pressure reduction auxiliary mechanism (5) includes a plurality of auxiliary tubes (501) installed between the auxiliary box (605) and the plug (1), and the connection between the auxiliary tubes (501) and the plug (1) is located at the top of the valve plate assembly; The connecting assembly includes a bottom groove formed on the bottom outer wall of the bottom block (211), a sealing gasket (213) is installed on the bottom outer wall of the bottom block (211), a groove plate (217) driven by a drive motor is installed on the inner wall of the bottom groove, and a locking block (215) is installed at both ends of the top outer wall of the main block (214). The groove plate (217) moves in and out of the locking block (215) by rotating the groove plate (217).

2. The fire hydrant with adjustable water pressure according to claim 1, characterized in that: Several springs (209) are installed on the bottom outer wall of the circular block (203), and a ring (218) is installed on the bottom outer wall of each spring (209). Several positioning rods (208) located in the springs (209) are installed on the top outer wall of the main block (214). Several circular grooves are opened on the top outer wall of the circular block (203), and the positioning rods (208) are inserted into the circular grooves. A detachable circular cover (206) is installed on the top outer wall of the L-shaped tube (201), and a buffer pad is installed on the bottom outer wall of the circular cover (206).

3. The fire hydrant with adjustable water pressure according to claim 1, characterized in that: The filling component includes a slot on the outer wall of the main block (214), in which a filling airbag (216) is installed. A rubber ring (212) is fitted on the outer wall of the main block (214), and the filling airbag (216) is located inside the rubber ring (212). A first air ring (210) communicating with the filling airbag (216) is installed on the top outer wall of the main block (214). A connecting hose (207) is installed on the first air ring (210), and an air valve is installed on the connecting hose (207).

4. A fire hydrant with adjustable water pressure according to claim 1, characterized in that: The valve plate assembly includes a vertical ring (9) installed on the top cover (4), a liftable vertical rod (10) is installed in the vertical ring (9), a valve plate body (8) is provided on the bottom outer wall of the vertical rod (10), a fixing ring (11) is installed on the inner wall of the bolt (1), and the valve plate body (8) is inserted into the fixing ring (11).

5. A fire hydrant water pressure regulating system with adjustable water pressure, using a fire hydrant with adjustable water pressure as described in any one of claims 1-4, characterized in that: The system includes: adjusting the position of the main block (214) to record pressure changes to obtain initial position information and initial pressure change value; establishing the correlation between position information and pressure change value; recording the relationship between the drainage time of the auxiliary pipe (501) and the air intake time of the auxiliary box (605) and water pressure change to obtain basic position information and basic pressure change value; establishing the correspondence between basic position information and basic pressure change value; integrating position information, pressure change value, correlation, basic position information, basic pressure change value and correspondence to obtain control catalog; obtaining user needs; obtaining adjustment information based on user needs and control catalog; and controlling adjustment mechanism (2) based on adjustment information to complete water pressure adjustment.

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