A hydrant water pressure detection device and method for building fire fighting facility detection

Abstract

The application relates to a fire hydrant water pressure detection device and method for building fire-fighting equipment detection, and relates to the technical field of fire-fighting equipment detection. The device comprises a test device shell, a closed metering water tank, a water inlet control valve, a water tester and an exhaust valve. Mechanical synchronous opening and closing of the fire hydrant, the water tester and the exhaust valve are realized through a water inlet linkage assembly and an exhaust linkage assembly. A liquid level detector and a main controller are arranged to realize electric control monitoring, and a float driving assembly is used to mechanically close the water inlet control valve when the water level exceeds the standard, so that double overflow protection of electric control and machinery is formed. The application can realize single-point operation of multiple valve linkage, simplify the test process, provide reliable mechanical backup protection when the electric control fails, and improve the detection safety and efficiency.

Description

Technical Field

[0001] This application relates to the field of fire equipment testing technology, specifically to a fire hydrant water pressure testing device and method for testing building fire protection facilities. Background Technology

[0002] Building fire protection facilities are crucial infrastructure for ensuring public safety. Water pressure testing of fire hydrant systems is a key step in assessing network performance and ensuring reliable water supply during fires. Currently, the industry commonly uses a method of installing test devices on the roof or at the most unfavorable point in the network. This involves manually opening valves to release water, simulating firefighting conditions, and then measuring the pressure and flow data at the end of the system. Conventional testing procedures typically rely on operators manually operating the inlet valve, test valve, and air vent valve sequentially. Electrically controlled sensors monitor water level changes to control the testing process, and the collected data is transmitted to a monitoring terminal for analysis to determine whether the operation of the fire pumps and network meets design specifications.

[0003] However, in long-term engineering practice and industry applications, existing detection methods face the dual challenges of poor operational coordination and a single safety protection mechanism. On the one hand, the independent operation mode of multiple valves leads to cumbersome testing procedures, making it difficult to achieve rapid synchronous response, thus affecting detection efficiency and the real-time accuracy of data. On the other hand, overflow protection relies excessively on electronic control systems. Once abnormal situations such as sensor failure, circuit faults, or power outages occur, the system is prone to losing its ability to cut off water flow, thereby causing overflow accidents, resulting in facility damage or safety hazards. How to achieve efficient linkage operation and build a highly reliable dual safety barrier under complex working conditions has become a technical bottleneck that urgently needs to be solved in this field. Summary of the Invention

[0004] This application provides a fire hydrant water pressure testing device and method for testing building fire protection facilities, which can solve the technical problems of existing fire hydrant water pressure tests where each valve needs to be controlled separately, the operation is cumbersome, and the overflow protection relies solely on the electrical control system, resulting in insufficient safety.

[0005] To achieve the above objectives, this application provides the following technical solution: The first aspect of this application provides a fire hydrant water pressure testing device for testing building fire protection facilities, comprising: The test device has an outer shell with a closed metering water tank installed at the bottom. The water tank contains a liquid level detector and a float drive assembly. The float drive assembly includes a float and a linkage component. The linkage component extends out of the water tank and connects to the valve stem of the inlet control valve. The water tank is equipped with a drain outlet. The water tank is connected to a water tester. The water tester is connected to an air vent control valve. The air vent control valve is equipped with an air vent. The water tester is connected to a water inlet control valve. The water inlet control valve is connected to a fire hydrant. The fire hydrant is connected to a water inlet. The main controller and manual alarm button are installed inside the casing. The water tester is electrically connected to the main controller, and the monitor is electrically connected to the main controller on the outside of the casing. The fire hydrant valve stem and the test valve stem are connected via an inlet linkage assembly. When the fire hydrant valve stem rotates, the test valve stem rotates synchronously via the inlet linkage assembly. The test valve stem and the exhaust control valve stem are connected via an exhaust linkage assembly. When the test valve stem rotates, the exhaust control valve stem rotates synchronously via the exhaust linkage assembly. The exhaust valve releases air as the exhaust control valve opens. When the water level in the tank causes the float to rise to the overflow level, the linkage pulls the inlet control valve to close and cut off the water supply; the level detector outputs a level signal to the main controller, and when the water level reaches the alarm level, the main controller controls the test device to close and sounds an alarm; when the overflow level is higher than the alarm level, the float drive assembly mechanically closes the inlet control valve as a redundant backup for the main controller's electrically controlled closure.

[0006] In one optional embodiment, the water inlet linkage assembly includes a drive member disposed on the fire hydrant valve stem, a driven member disposed on the test valve stem, and a linkage rod connecting the two; the exhaust linkage assembly includes a drive member disposed on the test valve stem, a driven member disposed on the exhaust control valve stem, and a linkage rod connecting the two.

[0007] In one optional embodiment, the water inlet linkage assembly is a meshing bevel gear pair; or, the water inlet linkage assembly is a worm gear pair in which a worm and a worm wheel cooperate.

[0008] In one optional embodiment, the exhaust linkage assembly is a meshing bevel gear pair; or, the exhaust linkage assembly is a worm gear pair in which a worm and a worm wheel cooperate.

[0009] In one optional embodiment, the water inlet linkage assembly has a transmission ratio such that when the fire hydrant valve stem rotates at a first angle, the test valve stem rotates synchronously at a second angle, and the ratio of the second angle to the first angle is 1:1 to 3:1.

[0010] In one optional embodiment, the linkage includes a linkage arm and a traction cable. The first end of the linkage arm is connected to the float, and the second end extends out of the top of the water tank and is connected to the valve stem of the water inlet control valve via the traction cable. The traction cable passes around the guide wheel on the inner side wall of the outer shell, and a tension adjuster is provided on the traction cable.

[0011] In one optional embodiment, a guide sleeve is provided at the top of the water tank for the linkage arm to pass through, and a sealing ring is provided between the guide sleeve and the linkage arm; a return spring is provided on the valve stem of the water inlet control valve, which is used to drive the valve stem to reset and open the water inlet control valve after the water level drops.

[0012] In one optional embodiment, the main controller collects pressure and flow data at the end of the pipeline network through a test device and sends it to the fire monitoring room and cloud platform; the main controller has the function of automatically shutting off valves when power is off and the function of prioritizing fire linkage control signals.

[0013] In one optional embodiment, the level detector is a float-type, capacitive, or ultrasonic level sensor; the bottom of the water tank is conical or arc-shaped, and the drain outlet is located at the lowest position on the side of the water tank.

[0014] The second aspect of this application provides a method for testing the water pressure of fire hydrants for testing building fire protection facilities, using the device described in any of the preceding claims, comprising: S1, connecting the inlet pipe and the outlet pipe, and opening the fire hydrant; S2, the fire hydrant valve stem drives the test device to open via the inlet linkage assembly, and the test device valve stem drives the exhaust control valve to open via the exhaust linkage assembly, and the exhaust valve to exhaust air, with water flowing into the water tank through the inlet control valve and the test device; S3, the water tank collects the test water and drains it, and the level detector monitors the water level in real time; S4, when the water level reaches the alarm level, the main controller electrically shuts down the test device and sounds an alarm; when the water level continues to rise to the overflow level, the float mechanically closes the inlet control valve via the linkage component to cut off the water supply, achieving redundant protection.

[0015] This application provides a fire hydrant water pressure testing device and method for testing building fire protection facilities. The solution constructs an integrated testing system comprising a test device housing, a closed metering water tank, an inlet control valve, a test valve, and an air vent valve. An inlet linkage component rigidly connects the fire hydrant valve stem to the test valve stem, and an air vent linkage component connects the test valve stem to the air vent control valve stem in series. This allows the operator to synchronously drive the test valve and air vent valve to open sequentially when rotating the fire hydrant valve stem, achieving multi-valve linkage response under single-point operation. Furthermore, the system is equipped with an electrical control protection circuit consisting of a level detector and a main controller. When the water level reaches a preset alarm level, the test valve is automatically shut off. Simultaneously, an independent float drive component is introduced. When the water level continues to rise to the overflow level, the float mechanically pulls the inlet control valve to close directly through a linkage component, forming a physical cutoff mechanism independent of the power system. This composite architecture, which combines mechanical synchronous linkage, active electrical control early warning, and mechanical backup cutoff, effectively solves the technical problems in existing fire hydrant water pressure tests, such as the need for separate control of each valve, cumbersome operation, and insufficient safety due to the reliance on the electrical control system for overflow protection. Therefore, it avoids test interruptions and overflow risks caused by human error or electrical control system failure, and significantly improves the automation level, response speed, operational reliability, and intrinsic safety level of fire protection testing operations under extreme conditions. Attached Figure Description

[0016] Figure 1 A structural block diagram of a fire hydrant water pressure testing device for testing building fire protection facilities provided in this application; Figure 2 The flowchart illustrates the process of using a fire hydrant water pressure testing method for testing building fire protection facilities provided in this application, in which the float mechanically closes the inlet control valve via a linkage to cut off the water supply when the water level reaches the overflow level. Detailed Implementation

[0017] The technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] Example 1: like Figure 1 As shown, this embodiment provides a fire hydrant water pressure testing device for testing building fire protection facilities. The device includes: a test device housing 1, a closed metering water tank 6, a level detector, a float drive assembly, an inlet control valve 4, a drain outlet 5, a test device 7, an exhaust control valve 8, an exhaust valve 9, a fire hydrant 2, an inlet 3, a main controller 10, a manual alarm button 11, a monitor 12, an inlet linkage assembly, and an exhaust linkage assembly. The closed metering water tank 6 is installed at the bottom of the test device housing 1. The water tank 6 contains a level detector and a float drive assembly. The float drive assembly includes a float and a linkage component, which extends out of the water tank 6 and connects to the valve stem of the inlet control valve 4. In this embodiment, the closed metering water tank 6 serves as the bearing and metering container for water pressure testing. Its closed structure effectively prevents water splashing and leakage during the test, ensuring a safe and clean testing environment. The level detector, installed inside the water tank 6, monitors water level changes in real time and feeds the signal back to the main controller 10, serving as the fundamental component for electro-hydraulic level monitoring. The float drive assembly constitutes a mechanical liquid level sensing and actuation mechanism. The float rises and falls with the water level, and the vertical displacement is converted into mechanical traction force on the valve stem of the inlet control valve 4 through the linkage. To achieve the above functions, the float is usually a hollow sphere or hollow cylinder, and the material can be stainless steel or corrosion-resistant plastic to ensure stable buoyancy performance under long-term immersion conditions. The linkage can be a rigid connecting rod or a flexible steel cable chain. The part of the linkage that passes through the water tank 6 needs to be equipped with a sealing guide sleeve to ensure smooth movement of the linkage while maintaining the sealing of the water tank 6. The inlet control valve 4, as the main switch of the water inlet passage, is directly driven by the linkage. When the water level reaches the preset limit, it can forcibly close the valve without relying on electricity, cutting off the external water source, thereby providing the last physical safety barrier.

[0019] Water tank 6 is equipped with a drain outlet 5. Water tank 6 is connected to a test device 7, which in turn is connected to an air release control valve 8. The air release control valve 8 is equipped with an air release valve 9. The test device 7 is connected to an inlet control valve 4, which in turn connects to a fire hydrant 2. The fire hydrant 2 is connected to an inlet 3. Specifically, the drain outlet 5 is located at the bottom or lower side wall of water tank 6 and is used to drain the test water from the tank after testing. It is typically equipped with a manual drain valve or a solenoid valve to control the timing of the drain. The test device 7, as the core controlled component of this device, is connected to water tank 6 at one end to control water injection or pressure holding, and at the other end to the inlet control valve 4 via a piping system, forming a controllable water inlet channel. The air release control valve 8 is connected to the test device 7 and is used to expel air from the piping and water tank during water injection, preventing air resistance from adversely affecting the accuracy of the water pressure test. The air release valve 9 is installed on the air release control valve 8 and serves as the physical port for gas discharge; its opening and closing are directly controlled by the state of the air release control valve 8. Fire hydrant 2, serving as the object to be tested or the connection interface, is connected between the inlet control valve 4 and the inlet 3. The inlet 3 is used to connect to the external fire water supply network or booster pump. In terms of the overall connection, the water flow path is as follows: inlet 3, fire hydrant 2, inlet control valve 4, test device 7, and finally into the metering water tank 6; while the gas path is from the water tank 6 and the air in the pipeline through the test device 7, the vent control valve 8, and finally discharged through the vent valve 9. This integrated pipeline layout highly integrates the functions of water inlet, testing, and venting, reducing the complexity of external pipeline connections and lowering the risk of leakage.

[0020] The outer casing 1 houses the main controller 10 and a manual alarm button 11. The test device 7 is electrically connected to the main controller 10, and the external monitor 12 is electrically connected to the main controller 10. In this structure, the outer casing 1 provides a protective shell for the internal electronic components, providing dustproof and waterproof functions to adapt to the harsh environment of fire testing sites. The main controller 10, as the control center of the entire device, is typically a microcontroller, PLC (Programmable Logic Controller), or industrial control computer, and has preset water level threshold judgment logic, valve control strategies, and alarm triggering programs. The test device 7 is usually a solenoid valve or electric valve, whose electrical control terminal is connected to the output control port of the main controller 10, receiving switching commands from the main controller 10 to adjust the on / off state. The manual alarm button 11 serves as a means of manual intervention, connected to the signal input terminal of the main controller 10, and is used by the operator to actively trigger the alarm signal in case of emergency or system failure. The monitor 12 is installed externally and can be a display screen, indicator light group or remote terminal device. It is connected to the main controller 10 for real-time display of water tank level, valve status, pressure value and alarm information, so as to facilitate operators to monitor the operation status of the device.

[0021] The valve stem of fire hydrant 2 is connected to the valve stem of test device 7 via a water inlet linkage assembly. When the valve stem of fire hydrant 2 rotates, it drives the valve stem of test device 7 to rotate synchronously via the water inlet linkage assembly. Similarly, the valve stem of test device 7 is connected to the valve stem of exhaust control valve 8 via an exhaust linkage assembly. When the valve stem of test device 7 rotates, it drives the valve stem of exhaust control valve 8 to rotate synchronously via the exhaust linkage assembly, and exhaust valve 9 releases air as exhaust control valve 8 opens. It should be understood that the water inlet linkage assembly and the exhaust linkage assembly are key transmission structures for achieving multi-valve mechanical linkage. Their core function is to synchronously transmit the operation of one valve to other valves, thereby achieving a one-button operation linkage effect. The water inlet linkage assembly is connected between the valve stem of fire hydrant 2 and the valve stem of test device 7. When the operator rotates the handwheel of fire hydrant 2 to open the valve, this rotational motion is transmitted through the water inlet linkage assembly, driving the valve stem of test device 7 to rotate synchronously, thus opening test device 7. As one implementation method, the water inlet linkage assembly can employ a linkage mechanism, a rack and pinion mechanism, a flexible shaft drive, or a chain drive mechanism, as long as it can achieve synchronous transmission of angular displacement between the two valve stems. Similarly, the venting linkage assembly is connected between the valve stem of the test device 7 and the valve stem of the venting control valve 8. When the valve stem of the test device 7 is rotated, the venting linkage assembly actuates accordingly, causing the valve stem of the venting control valve 8 to rotate synchronously, thereby opening the venting control valve 8. At this time, the venting valve 9 is in the venting state along with the opening of the venting control valve 8, automatically venting the air in the pipeline. This mechanical linkage design ensures that the venting action is automatically and synchronously performed when the water inlet process is started, without the need for manual operation of the venting valve, effectively avoiding water hammer effects or inaccurate testing problems caused by forgetting to vent.

[0022] When the water level in tank 6 causes the float to rise to the overflow level, the linkage pulls the inlet control valve 4 to close and cut off the water supply. The level detector outputs a level signal to the main controller 10. When the water level reaches the alarm level, the main controller 10 controls the test device 7 to close and sounds an alarm. If the overflow level is higher than the alarm level, the float drive assembly mechanically closes the inlet control valve 4 as a redundant backup for the main controller 10's electrically controlled closure. In this embodiment, the device constructs a dual overflow protection mechanism with electrical control as the priority and mechanical backup. The level detector monitors the water level in tank 6 in real time and transmits analog or digital level signals to the main controller 10. When the water level rises to the preset alarm level, it indicates that the full load state is about to be reached. The main controller 10 immediately issues a command based on this signal to control the test device 7 to close, cutting off the water flow into the tank and triggering an audible and visual alarm to alert the operator. If the electrical control system malfunctions at this time, such as the main controller 10 freezing, power failure, or the test device 7 jamming, causing the water level to continue rising, the mechanical protection function of the float drive assembly will be activated. When the water level rises further to a higher overflow level, the float rises with the water level to its highest point, and through leverage or direct traction, drives the linkage to generate sufficient mechanical stroke, forcibly pulling the valve stem of the inlet control valve 4 to close. Since the overflow level setpoint is higher than the alarm level, the mechanical closing action only serves as a backup protection measure after electrical control failure, forming a redundant safety architecture. This design ensures that the system can effectively prevent water tank overflow under any single failure mode, guaranteeing the safety and reliability of the test process.

[0023] The core innovation of this application lies in constructing an automated water pressure detection architecture that integrates mechanical synchronous opening and closing with dual redundancy to prevent overflow. Through the mechanical coupling of the inlet linkage component and the exhaust linkage component, synchronous action between the fire hydrant, the test device, and the exhaust valve is achieved, simplifying the cumbersome multi-step valve operation into a single fire hydrant opening action. Simultaneously, by combining the level detector with the electrical protection of the main controller and the mechanical protection of the float drive component, a graded response safety barrier is established, effectively solving the safety hazards caused by the failure of a single control method.

[0024] The working process and principle of this application are as follows: When conducting a fire hydrant water pressure test, the operator first opens the fire hydrant 2. The rotation of the valve stem of the fire hydrant 2 is transmitted through the water inlet linkage assembly, causing the valve stem of the test device 7 to rotate and open synchronously. At the same time, the air release linkage assembly drives the air release control valve 8 to open. At this time, water from the water inlet 3 flows through the fire hydrant 2, the water inlet control valve 4, and the test device 7 into the metering water tank 6, while the air in the pipeline is discharged through the air release valve 9. As water is injected, the water level in the water tank 6 rises, and the level detector feeds back the real-time level data to the main controller 10. When the water level reaches the alarm level but has not yet overflowed, the main controller 10 determines that water injection is complete or that an abnormality has occurred, and then controls the test device 7 to close and triggers an alarm. If the electrical control system fails and the test device 7 fails to close, the water level continues to rise to the overflow level. The float in the float drive assembly floats to the limit position with the water level and applies mechanical force directly to the valve stem of the inlet control valve 4 through the linkage, forcibly closing the inlet control valve 4 and physically cutting off the water source, thereby completing the entire test and protection process.

[0025] Through the above technical solution, this application achieves the following beneficial effects: Due to the inclusion of inlet linkage components and exhaust linkage components, the mechanical synchronous opening and closing of the fire hydrant, tester, and exhaust valve is realized, greatly simplifying the testing operation process and avoiding possible sequence errors or omissions when manually operating each valve separately, thus improving testing efficiency and accuracy. Because an electrical control protection mechanism consisting of a level detector and a main controller, and a mechanical protection mechanism consisting of a float drive component, are adopted, and the overflow water level is higher than the alarm water level, a dual-redundant overflow protection system with electrical control as the primary method and mechanical control as the secondary method is formed. This effectively overcomes the safety deficiencies caused by relying solely on a single electrical control system in existing technologies, ensuring reliable prevention of water tank overflow even in the event of system power failure or component malfunction, significantly improving the safety, reliability, and operational stability of the device under complex operating conditions.

[0026] Example 2: In another embodiment, this application also provides a water inlet linkage assembly and an exhaust linkage assembly. The water inlet linkage assembly includes a drive member mounted on the valve stem of the fire hydrant 2, a driven member mounted on the valve stem of the test valve 7, and a linkage rod connecting the two. The exhaust linkage assembly includes a drive member mounted on the valve stem of the test valve 7, a driven member mounted on the valve stem of the exhaust control valve 8, and a linkage rod connecting the two.

[0027] The aforementioned driving component, driven component, and linkage rod together constitute a mechanical transmission chain that transmits rotational motion from one valve stem to another. The driving component is fixedly mounted on the active valve stem to rotate with the valve stem and output power; the driven component is fixedly mounted on the passive valve stem to receive power and drive the valve stem to rotate synchronously; the linkage rod connects the driving component and the driven component to transmit torque between them. Exemplarily, the driving component and the driven component can adopt structures such as a connecting arm, a shift fork, or a connecting disc, with both ends of the linkage rod hinged or fixedly connected to the driving component and the driven component respectively, thereby forming a rigid or flexible transmission connection.

[0028] Based on the above structure, when the operator rotates the valve stem of fire hydrant 2, the power is transmitted to the valve stem of tester 7 via the driving component, linkage rod, and driven component in the water inlet linkage assembly, causing it to rotate synchronously. Subsequently, the rotation of the valve stem of tester 7 serves as input, further driving the valve stem of exhaust control valve 8 to rotate via the exhaust linkage assembly. This cascaded mechanical synchronous linkage control avoids the cumbersome steps caused by operating each valve independently, improving detection efficiency. At the same time, the purely mechanical transmission method ensures that the linkage function remains effective even in extreme situations such as power outages, enhancing the reliability of the device.

[0029] Example 3: In one possible implementation, the water inlet linkage component is a meshing bevel gear pair. The bevel gear pair is used to realize the motion and power transmission between intersecting shafts. In this embodiment, it is mainly used to connect the valve stem of the fire hydrant 2 and the valve stem of the test device 7. Since the installation positions of the fire hydrant 2 and the test device 7 may have spatial angular differences, the use of a bevel gear pair can flexibly adapt to the arrangement requirements of different axes, ensuring smooth transmission. Specifically, the bevel gear pair includes a driving bevel gear mounted on the driving shaft and a driven bevel gear mounted on the driven shaft, with their tooth profiles meshing. When the driving bevel gear rotates with the valve stem of the fire hydrant 2, it drives the driven bevel gear to rotate through the meshing action of the teeth, thereby driving the valve stem of the test device 7 to rotate synchronously. This transmission method has a compact structure, high transmission efficiency, smooth operation, and low noise.

[0030] In another possible implementation, the water inlet linkage component is a worm gear and worm wheel pair. The worm gear and worm wheel pair is used to transmit motion and power between spatially intersecting axes; in this embodiment, it is also used to connect the valve stem of the fire hydrant 2 and the valve stem of the test device 7. The worm is typically connected to the valve stem of the fire hydrant 2 as the driving element, and the worm wheel is connected to the valve stem of the test device 7 as the driven element. A significant characteristic of the worm gear and worm wheel pair is its self-locking property; that is, only the worm can drive the worm wheel to rotate, while the worm wheel cannot drive the worm to rotate. This characteristic plays an important role in the fire detection scenario of this application, effectively preventing the valve stem of the test device 7 from driving the valve stem of the fire hydrant 2 in the opposite direction due to fluctuations or impacts in the water flow pressure within the pipeline, thereby avoiding accidental opening or closing of the valve and improving the operational stability and safety of the device under high-pressure conditions. Furthermore, the worm gear transmission ratio is typically large, achieving a speed reduction and torque increase effect, making it easier for operators to rotate the fire hydrant 2.

[0031] Through the above technical solutions, this application achieves diversified configurations of the water inlet linkage component. By employing bevel gear pairs or worm gear pairs, the most suitable transmission structure can be flexibly selected based on the actual installation space layout, torque transmission requirements, and different safety considerations. In particular, the self-locking function of the worm gear pair provides additional mechanical safety assurance for the system, resolving the risk of malfunction that may exist if relying solely on electrical control or ordinary transmission mechanisms, thereby enhancing the overall reliability and adaptability of the fire hydrant water pressure detection device.

[0032] Example 4: In an optional embodiment, this application also provides an exhaust linkage assembly. The exhaust linkage assembly is a meshing bevel gear pair; or, it is a worm gear and worm wheel pair. In this embodiment, the exhaust linkage assembly serves as the core transmission component connecting the valve stem of the test device 7 and the valve stem of the exhaust control valve 8. Its main function is to precisely transmit the rotational movement of the valve stem of the test device 7 to the valve stem of the exhaust control valve 8, thereby realizing an automated exhaust process in which the exhaust valve 9 is activated in conjunction with the opening of the test device 7.

[0033] When the exhaust linkage assembly uses a meshing bevel gear pair, the transmission characteristics of the intersecting bevel gear axes can accommodate the non-parallel spatial layout that may exist between the valve stem of the test device 7 and the valve stem of the exhaust control valve 8, achieving smooth power transmission. The bevel gear pair has a compact structure and high transmission efficiency, ensuring that the exhaust control valve 8 and the test device 7 maintain a strict synchronous rotation relationship, thereby meeting the requirements for response speed and transmission accuracy.

[0034] As another optional implementation, when the exhaust linkage assembly adopts a worm gear pair with a worm and a worm wheel, the self-locking characteristic and large single-stage transmission ratio of the worm gear drive can not only achieve large-angle deceleration or acceleration adjustment, but also effectively prevent the exhaust control valve 8 from unexpectedly reversing or malfunctioning due to fluid pressure fluctuations or vibrations in the pipeline. This configuration significantly improves the operational stability and reliability of the device under complex working conditions, and is particularly suitable for scenarios with high requirements for backflow prevention or position maintenance. Through the above technical solutions, this application realizes diversified configurations of the specific transmission structure of the exhaust linkage assembly, ensuring reliable synchronous linkage opening and closing between the exhaust valve and the test device, and enhancing the device's adaptability to different installation spaces and stability requirements.

[0035] Example 5: In another alternative embodiment, the water inlet linkage assembly has a transmission ratio such that when the valve stem of the fire hydrant 2 rotates at a first angle, the valve stem of the test device 7 rotates synchronously at a second angle, with the ratio of the second angle to the first angle being 1:1 to 3:1. This transmission ratio configuration is designed to limit the angular velocity coupling relationship between the valve stem of the fire hydrant 2 and the valve stem of the test device 7, ensuring that when the operator drives the handwheel of the fire hydrant 2, the test device 7 can respond and open at a matched rate.

[0036] Specifically, the value of the transmission ratio depends on the structural parameters of the transmission pairs within the water inlet linkage assembly. For example, when a gear transmission mechanism is used, the transmission ratio... The number of teeth of the driven gear With the number of teeth of the driving gear The ratio is determined, that is The drive wheel is connected to the valve stem of fire hydrant 2, and its number of teeth is... The driven wheel is connected to the valve stem of the tester 7, and its number of teeth is... If a worm gear drive is used, the transmission ratio is determined by the ratio of the number of worm threads to the number of worm teeth. By setting the ratio of the second angle to the first angle within the range of 1:1 to 3:1, the system can achieve a small rotation of the fire hydrant 2 valve stem to drive a larger rotation of the test device 7 valve stem, or maintain near-synchronous rotation between the two. This kinematic matching allows the operator to quickly bring the test device 7 to the required opening state with only a small rotation of the fire hydrant 2, thus significantly improving the convenience and responsiveness of the testing operation and effectively shortening the test preparation cycle.

[0037] Based on the above structural configuration, this application optimizes the matching relationship between the input torque and the valve opening stroke by quantitatively limiting the transmission ratio of the water inlet linkage component. This design overcomes the defects of difficult operation or delayed opening caused by unreasonable transmission ratio settings in traditional devices, thereby improving the overall operating efficiency of the fire hydrant water pressure testing device for building fire protection facilities.

[0038] Example 6: In another optional embodiment, this application also provides a linkage component. This linkage component includes a linkage arm and a traction cable. The first end of the linkage arm is connected to the float, and the second end extends through the top of the water tank 6 and is connected to the valve stem of the inlet control valve 4 via the traction cable. As a rigid transmission component connecting the float and the traction cable, the linkage arm's first end is fixedly connected to the float and can move synchronously with the rise and fall of the float, ensuring that the vertical displacement of the float is accurately transmitted to the traction system. The second end of the linkage arm extends upward and through the top of the water tank 6. To maintain the sealing performance of the water tank 6, a guide sleeve and a sealing structure are typically provided at the through-end position, allowing the linkage arm to slide freely up and down while effectively preventing water leakage from the water tank. The traction cable, as a flexible transmission medium, has one end connected to the second end of the linkage arm extending through the top of the water tank 6, and the other end extending to and fixedly connected to the valve stem of the inlet control valve 4, thereby establishing a mechanical transmission path between the linkage arm and the valve stem.

[0039] The traction cable passes over a guide wheel on the inner wall of the outer casing 1, and a tension adjuster is installed on the traction cable. The guide wheel is fixedly installed on the inner wall of the outer casing 1 to change the traction direction of the traction cable, allowing the traction cable to adapt to possible spatial differences between the water tank 6 and the inlet control valve 4, achieving flexible path arrangement, and reducing frictional resistance of the traction cable during transmission. The tension adjuster is located on the path of the traction cable to adjust and maintain the tension of the traction cable. By adjusting the tension adjuster, the slack of the traction cable caused by long-term use, thermal expansion and contraction, or component wear can be compensated, ensuring that the traction cable is always in a proper tension state. This ensures that when the float rises, it can pull the valve stem of the inlet control valve 4 in a timely and effective manner, avoiding delayed or failed mechanical closing action due to cable slack.

[0040] Through the above technical solution, this application achieves the conversion of the vertical buoyancy of the float in the water tank into a pulling force on the valve stem of the inlet control valve by the cooperation of the linkage arm and the traction cable, thereby reliably closing the valve when the water level reaches the overflow position. The guide wheel optimizes the traction path and adapts to the internal spatial layout of the device; the tension regulator ensures the reliability of the transmission system, prevents mechanical protection failure due to slack in the traction cable, and improves the stability of the device during long-term operation.

[0041] Example 7: In another optional embodiment, a guide sleeve is provided at the top of the water tank 6 for the linkage arm to pass through, and a sealing ring is provided between the guide sleeve and the linkage arm. The guide sleeve is installed at the top opening of the water tank 6 and is mainly used to guide and limit the lifting and lowering movement of the linkage arm to prevent the linkage arm from deflecting or jamming during the up and down movement with the float, thereby ensuring the straightness and stability of the tension transmitted by the linkage. The sealing ring is set in the gap between the guide sleeve and the linkage arm to fill the annular space between them and form a dynamic sealing barrier. This sealing ring can effectively block the water flow inside the water tank 6 from leaking out through the outlet hole of the linkage arm, ensuring the sealing and metering accuracy of the metering water tank 6 during the testing process. The sealing ring can adopt sealing structure forms well known to those skilled in the art, such as O-rings, V-rings, or Glyd rings. Its material can be selected from wear-resistant and aging-resistant materials such as nitrile rubber, fluororubber, or polyurethane, depending on the actual working conditions. This application embodiment does not make any special limitations on this.

[0042] A return spring is installed on the valve stem of the inlet control valve 4 to drive the valve stem to reset and open the inlet control valve 4 after the water level drops. The return spring is sleeved on or abuts against the valve stem of the inlet control valve 4, and its elastic force is configured to overcome the resistance or other external forces when the water level drops below the overflow level, pushing the valve stem to move in the direction of opening the inlet control valve 4. When the water level rises and triggers the mechanical linkage protection, the float pulls the valve stem through the linkage arm and traction cable to overcome the elastic force of the return spring, causing the inlet control valve 4 to close and cut off the water intake; when the fault is cleared or the test ends and the water level drops, the tension of the float on the valve stem decreases or disappears, the return spring releases its stored elastic potential energy, and drives the valve stem to automatically reset to the initial position, thereby reopening the inlet control valve 4. This design realizes the automatic recovery function of the inlet control valve 4, restoring the normal standby state of the device without manual intervention, improving the automation level and testing efficiency of the device. The stiffness coefficient and pre-compression of the return spring can be calculated and selected based on the inlet control valve 4's diameter, operating torque, and required return force. For example, it can be based on Hooke's Law. Designing, among which The elastic force provided by the spring Let be the stiffness coefficient of the spring. The specific parameters of the reset spring are not limited in this embodiment, which refers to the amount of spring deformation.

[0043] Through the above technical solution, this application effectively solves the problem of water leakage that may occur during the reciprocating motion of the linkage arm by setting a guide sleeve with a sealing ring on the top of the water tank 6, thus ensuring the sealing performance and environmental friendliness of the device. At the same time, by setting a reset spring on the valve stem of the inlet control valve 4, the valve is automatically reset and opened by utilizing its elastic restoring force, avoiding the cumbersome manual operation required when the valve cannot automatically reset after the water level drops. This improves the automation level and ease of operation of the device, and ensures that the testing device can quickly return to a state where it can be tested again after completing an anti-overflow protection action.

[0044] Example 8: In another optional embodiment, this application also provides a main controller 10. The main controller 10 collects pressure and flow data at the end of the pipeline network via the test device 7 and sends it to the fire monitoring room and cloud platform; the main controller 10 has an automatic valve shut-off function in case of power failure and a priority function for fire-fighting linkage control signals.

[0045] Specifically, the test device 7 integrates high-precision pressure and flow sensors to acquire dynamic water pressure and instantaneous flow parameters at the end of the fire protection pipeline network in real time. The main controller 10 communicates with the test device 7 via a data bus, filtering, amplifying, and converting the acquired analog signals to digital data, generating standardized digital test data. Subsequently, the main controller 10 uses its built-in communication module to transmit the processed pipeline network pressure and flow data to the fire control room and cloud platform via wired or wireless network, enabling remote transmission, storage, and visualization of the test data. This facilitates real-time monitoring of the pipeline network's operational status and historical data analysis by management personnel.

[0046] Regarding the automatic valve shut-off function in the event of a power outage, this function is achieved through an uninterruptible power supply or supercapacitor module integrated within the main controller 10. When the external power supply is interrupted, the main controller 10 can utilize its stored energy to maintain operation for a short period and immediately output a control signal to drive the test valve 7 to close the valve. This avoids water leakage or abnormal pipeline pressure caused by valve malfunction due to a power outage, effectively improving the safety and reliability of the device in the event of a sudden power outage.

[0047] Regarding the priority function of fire alarm control signals, during routine testing of the device, if the main controller 10 receives a fire alarm control signal from the fire alarm controller, this signal will be assigned the highest priority. The main controller 10 will immediately interrupt the current testing operation, prioritize the response to the fire alarm control signal, and forcibly close the test water device 7 and the inlet control valve 4 to ensure that the fire pipeline network quickly switches to fire water supply mode. This mechanism prevents the testing process from interfering with normal fire fighting operations, avoids the risk of testing operations occupying fire water sources or hindering the increase of pipeline pressure, thereby ensuring the overall safety and response speed of the building's fire protection system.

[0048] Through the above technical solution, this application realizes remote intelligent monitoring and dual safety control of the detection device. Because the main controller 10 can automatically collect and upload pressure and flow data at the end of the pipeline network, it solves the problems of low efficiency and difficult data management associated with traditional manual on-site readings, and achieves informatized and automated management of fire protection facility detection.

[0049] Example 9: In another alternative embodiment, the structure of the level detector and the water tank 6 is optimized. The level detector is a float-type, capacitive, or ultrasonic level sensor; the bottom of the water tank 6 is conical or arc-shaped, and the drain outlet 5 is located at the lowest point on the side of the water tank 6.

[0050] The level detector is used to monitor the changes in the liquid level in the metering tank 6 in real time and transmits the detected level signal to the main controller 10 as the basis for determining whether the alarm level or overflow level has been reached. In specific implementations, the level detector can be flexibly selected according to the actual working conditions. For example, a float-type level sensor can be used, which has a simple structure, low cost, and is suitable for conventional water quality environments; a capacitive level sensor can also be used, which has no moving parts, good stability, and can adapt to more complex liquid media; an ultrasonic level sensor can also be used, which uses the principle of ultrasonic reflection to measure distance, and has the advantages of non-contact measurement, high accuracy, and is not affected by liquid density and color, and can adapt to various working environments. All of the above-mentioned different types of sensors can achieve accurate feedback of the liquid level. The specific type of sensor selected can be chosen according to the actual installation space, water quality conditions, and accuracy requirements. This application embodiment does not impose any special limitations on this.

[0051] The water tank 6, serving as a container for collecting and measuring test water, has a conical or arc-shaped bottom. This design utilizes the guiding effect of the inclined surface to allow impurities and residual water deposited at the bottom of the tank to naturally slide down under gravity and collect at the lowest point. Furthermore, the drain outlet 5 is positioned at the lowest point on the side of the water tank 6. This ensures that when the tank 6 drains, the water flows smoothly from this position under the combined effect of gravity and the shape's guiding effect, minimizing stagnant water and residual water at the bottom of the tank. This structural design improves the measurement accuracy of each test and avoids inconsistencies in initial conditions for subsequent tests due to residual water from previous tests. For example, the bottom of the water tank 6 can be a conical structure, a spherical arc-shaped structure, or a pyramidal structure, as long as it forms a guiding inclined surface that converges towards the drain outlet 5.

[0052] Through the above technical solutions, this application achieves the adaptation to different application environments by selecting diverse liquid level detectors, ensuring the reliability and accuracy of liquid level monitoring; at the same time, by optimizing the bottom structure shape of the water tank 6 and the layout of the drain outlet 5, the test water is completely drained by gravity guidance, effectively avoiding the impact of residual water on the measurement accuracy, thereby ensuring the consistency and reliability of each fire hydrant water pressure test.

[0053] Example 10: In another embodiment, this application also provides a method for testing the water pressure of fire hydrants for inspecting building fire protection facilities. For example... Figure 2 As shown, the method includes the following steps: Step S201: Connect the water inlet pipe and the drain pipe, and turn on the fire hydrant 2.

[0054] Before performing the water pressure test, the physical connection and initialization preparation of the test pipeline must be completed. Seal the inlet pipe connector to the inlet 3 of fire hydrant 2 to establish a leak-free water supply channel; simultaneously, connect one end of the drain pipe to the drain outlet 5 of the metering water tank 6, and extend the other end to the designated drainage area to establish a collection and drainage path for the test water. After confirming that the pipeline connection is secure, turn the handwheel of fire hydrant 2 to open the valve, allowing the pressurized water flow in the fire protection network to meet the initial conditions for entering the test device.

[0055] Step S202: The valve stem of fire hydrant 2 drives the test device 7 to open via the water inlet linkage assembly. The valve stem of test device 7 drives the air venting control valve 8 to open via the air venting linkage assembly, and the air venting valve 9 to vent. Water flows through the water inlet control valve 4 and the test device 7 into the water tank 6.

[0056] Based on the opening action of the fire hydrant 2 valve, a mechanical linkage mechanism enables synchronous response of multiple valves. When the valve stem of fire hydrant 2 rotates, its inlet linkage component transmits torque to the valve stem of tester 7, driving tester 7 to open automatically without manual operation. Along with the rotation of the tester 7 valve stem, the exhaust linkage component further drives the exhaust control valve 8 to open, thereby triggering the exhaust valve 9 to perform the exhaust action. This process automatically removes air accumulated inside the pipes and devices, eliminating air resistance interference with the accuracy of water pressure testing. During the sequential linkage of valves, pressurized water in the fire protection network flows through the inlet control valve 4 and tester 7 into the metering water tank 6. Simultaneously, the built-in sensor in tester 7 collects pressure and flow data at the end of the network in real time and transmits it to the fire monitoring room and cloud platform via the main controller 10, achieving digital recording and remote monitoring of the detection data.

[0057] Step S203: Water tank 6 collects and drains the test water, and the level detector monitors the water level in real time.

[0058] The water flowing into the metering tank 6 is temporarily stored for measurement and observation. Utilizing gravity, the test water is smoothly drained through the drain outlet 5 located at the lowest point on the side. The conical or arc-shaped structure at the bottom of the tank 6 helps prevent water accumulation, thus ensuring the measurement accuracy of subsequent tests. During the water filling process, a level detector installed inside the tank 6 continuously monitors the real-time water level and converts the water level information into an electrical signal, which is then transmitted to the main controller 10. This real-time data provides the basis for subsequent overflow protection control, forming the foundation for the system's ability to sense changes in water volume.

[0059] Step S204: When the water level reaches the alarm level, the main controller 10 electrically shuts down the test water device 7 and alarms; when the water level continues to rise and reaches the overflow level, the float mechanically closes the inlet control valve 4 via the linkage to cut off the water inlet, thus achieving redundant protection.

[0060] In response to abnormal water level rises, the system employs a dual safety strategy combining active electrical protection and mechanical backup protection. When the water level in tank 6 reaches the preset alarm level, the main controller 10 executes electrical control logic based on the level detector signal, automatically shutting off the test device 7 to cut off the water supply and triggering the alarm module to send a warning to the operator or monitoring center. If the electrical control system fails to effectively cut off the water flow due to sensor failure, circuit fault, or controller malfunction, the water level will continue to rise to the preset overflow level. At this time, the float in tank 6 rises with the liquid level, generating mechanical tension through linkage components (such as linkage arms and traction cables) that directly acts on the valve stem of the inlet control valve 4, forcibly closing the inlet control valve 4. This purely mechanical action is independent of the power system and electronic components, serving as a reliable redundant backup after electrical control protection failure, physically blocking water inflow, effectively preventing tank 6 from overflowing or device damage, and ensuring the safety and reliability of the detection process.

[0061] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fire hydrant water pressure testing device for testing building fire protection facilities, characterized in that, include: The test device has an outer shell (1) with a closed metering water tank (6) installed at the bottom. The water tank (6) has a built-in liquid level detector and a float drive assembly. The float drive assembly includes a float and a linkage. The linkage extends out of the water tank (6) and connects to the valve stem of the inlet control valve (4). The water tank (6) is equipped with a drain outlet (5), the water tank (6) is connected to a test device (7), the test device (7) is connected to an exhaust control valve (8), the exhaust control valve (8) is equipped with an exhaust valve (9), the test device (7) is connected to an inlet control valve (4), the inlet control valve (4) is connected to a fire hydrant (2), and the fire hydrant (2) is connected to an inlet (3). The outer casing (1) contains the main controller (10) and the manual alarm button (11), the water tester (7) is electrically connected to the main controller (10), and the outer casing (1) has an external monitor (12) electrically connected to the main controller (10). The valve stem of the fire hydrant (2) is connected to the valve stem of the test device (7) via the water inlet linkage assembly. When the valve stem of the fire hydrant (2) rotates, it drives the valve stem of the test device (7) to rotate synchronously via the water inlet linkage assembly. The valve stem of the test device (7) is connected to the valve stem of the exhaust control valve (8) via the exhaust linkage assembly. When the valve stem of the test device (7) rotates, it drives the valve stem of the exhaust control valve (8) to rotate synchronously via the exhaust linkage assembly. The exhaust valve (9) exhausts air as the exhaust control valve (8) opens. When the water level in the tank (6) causes the float to rise to the overflow level, the linkage pulls the inlet control valve (4) to close and cut off the inlet water; the level detector outputs a level signal to the main controller (10). When the water level reaches the alarm level, the main controller (10) controls the tester (7) to close and alarm; when the overflow level is higher than the alarm level, the float drive assembly mechanically closes the inlet control valve (4) as a redundant backup for the main controller (10) to electrically close.

2. The apparatus according to claim 1, characterized in that, The water inlet linkage assembly includes a drive component on the valve stem of the fire hydrant (2), a driven component on the valve stem of the test water device (7), and a linkage rod connecting the two; the exhaust linkage assembly includes a drive component on the valve stem of the test water device (7), a driven component on the valve stem of the exhaust control valve (8), and a linkage rod connecting the two.

3. The apparatus according to claim 2, characterized in that, The water inlet linkage assembly is a meshing bevel gear pair; or, the water inlet linkage assembly is a worm gear pair consisting of a worm and a worm wheel.

4. The apparatus according to claim 2, characterized in that, The exhaust linkage assembly is a meshing bevel gear pair; or, the exhaust linkage assembly is a worm gear pair in which a worm and a worm wheel cooperate.

5. The apparatus according to claim 2, characterized in that, The water inlet linkage assembly has a transmission ratio. When the valve stem of the fire hydrant (2) rotates to the first angle, the valve stem of the tester (7) rotates synchronously to the second angle. The ratio of the second angle to the first angle is 1:1 to 3:

1.

6. The apparatus according to claim 1, characterized in that, The linkage includes a linkage arm and a traction cable. The first end of the linkage arm is connected to the float, and the second end extends out of the top of the water tank (6) and is connected to the valve stem of the water inlet control valve (4) via the traction cable. The traction cable passes around the guide wheel on the inner side wall of the outer shell (1), and a tension adjuster is provided on the traction cable.

7. The apparatus according to claim 6, characterized in that, The top of the water tank (6) is provided with a guide sleeve for the linkage arm to pass through, and a sealing ring is provided between the guide sleeve and the linkage arm; the valve stem of the water inlet control valve (4) is provided with a reset spring, which is used to drive the valve stem to reset and open the water inlet control valve (4) after the water level drops.

8. The apparatus according to claim 1, characterized in that, The main controller (10) collects the pressure and flow data at the end of the pipeline network through the test water device (7) and sends it to the fire monitoring room and cloud platform; the main controller (10) has the function of automatically closing the valve when the power is off and the function of prioritizing the fire linkage control signal.

9. The apparatus according to claim 1, characterized in that, The liquid level detector is a float-type, capacitive, or ultrasonic liquid level sensor; the bottom of the water tank (6) is conical or arc-shaped, and the drain outlet (5) is located at the lowest position on the side of the water tank (6).

10. A method for testing the water pressure of fire hydrants for inspecting building fire protection facilities, using the apparatus described in any one of claims 1-9, comprising: S1. Connect the inlet pipe and the outlet pipe, and open the fire hydrant (2). S2, the valve stem of the fire hydrant (2) drives the tester (7) to open in conjunction with the water inlet linkage assembly. The valve stem of the tester (7) drives the exhaust control valve (8) to open in conjunction with the exhaust linkage assembly and the exhaust valve (9) to exhaust. The water flows through the water inlet control valve (4) and the tester (7) into the water tank (6). S3, Water tank (6) collects and drains the test water, and the level detector detects the water level in real time; S4. When the water level reaches the alarm level, the main controller (10) electrically shuts down the test water device (7) and alarms; when the water level continues to rise to the overflow level, the float mechanically closes the inlet control valve (4) through the linkage to cut off the inlet water and achieve redundant protection.

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