Water filling time testing device for automatic water spray fire extinguishing system and implementation method

Abstract

The application relates to a water filling time testing device and implementation method for an automatic water spraying fire extinguishing system, belonging to the technical field of fire-fighting facility detection. A most unfavorable point nozzle action sensing circuit is used for collecting pressure and flow signals after the action of a terminal water testing device, and the physical signals are converted into electric signals and transmitted to a water filling time calculation module. An alarm valve action sensing circuit is used for collecting post-valve pressure and flow signals after the action of an alarm valve, and the physical signals are converted into electric signals and transmitted to the water filling time calculation module. The water filling time calculation module is used for receiving the electric signals transmitted from the nozzle action sensing circuit and the alarm valve of the automatic water spraying fire extinguishing system, and the electric signals are calculated and processed through a built-in program algorithm. The water filling time calculation result is transmitted to a display transmission module in the form of electric signals. The display transmission module displays the water filling time test value and the result of whether the system water filling time is qualified. The application can ensure that the system can play a fire control and extinguishing effect within a limited time when a fire breaks out.

Description

Technical Field

[0001] This invention belongs to the field of fire protection facility testing technology, specifically relating to a device and method for testing the water filling time of automatic sprinkler systems. It is directly applied to the testing of water filling time parameters during the installation, commissioning, testing, acceptance, daily maintenance, and fire supervision and inspection phases of automatic sprinkler systems in various building fire protection projects. It accurately corresponds to the core technical field of performance testing and specialized testing devices for automatic sprinkler systems, and is particularly suitable for scenarios requiring rapid and accurate acquisition of the time required for an automatic sprinkler system to fill with water from the activation signal, providing technical support for verifying the fire extinguishing effectiveness of automatic sprinkler systems. Background Technology

[0002] Building fires are among the most frequent types of disasters. If a fire is not controlled promptly and effectively in its initial stages, it will severely impact the safety of people's lives and property. Dry-pipe automatic sprinkler systems and pre-action automatic sprinkler systems are widely used in industrial and civil buildings involving low temperatures. Pre-action automatic sprinkler systems are divided into double-locking and single-locking pre-action systems. A double-locking pre-action system is a pre-action automatic sprinkler system where the pre-action device is activated by both the automatic fire alarm system and a pressure switch installed on the gas filling pipeline. A single-locking pre-action system is a pre-action automatic sprinkler system where the pre-action device is activated only by the automatic fire alarm system. Whether a dry-pipe automatic sprinkler system or a pre-action automatic sprinkler system can complete the pipeline filling process within a limited time directly affects the system's effectiveness in the initial stages of a fire. Therefore, it is crucial to ensure that the designed filling time of the system is reasonable and accurate, and that the filling time meets national standards and specifications before acceptance or commissioning. Adequate water filling time is of great significance for improving the effectiveness and reliability of automatic sprinkler systems, ensuring effective prevention and control of fires in their initial stages, and reducing property damage.

[0003] The current national standard, "Code for Design of Automatic Sprinkler Systems" (GB 50084-2017), stipulates that the water filling time for dry automatic sprinkler systems should not exceed 1 minute, the water filling time for double-interlock pre-action systems should not exceed 1 minute, and the water filling time for single-interlock pre-action systems should not exceed 2 minutes. Therefore, to ensure that automatic sprinkler systems can function effectively and promptly within a limited timeframe during a fire, it is necessary not only to design the water filling time reasonably and accurately, but also to ensure that the system can complete the water filling process promptly and accurately when a fire occurs. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for testing the water filling time of an automatic sprinkler fire extinguishing system. This device verifies whether the water filling time of the automatic sprinkler fire extinguishing system meets national standards and specifications before acceptance or commissioning. It also ensures that the automatic sprinkler fire extinguishing system can accurately and effectively complete the water filling process of the pipeline network when a fire occurs, thus ensuring that the system can play a role in controlling and extinguishing fires within a limited time after the initial outbreak of a fire.

[0005] The technical solution adopted in this invention is: a water filling time testing device for an automatic sprinkler fire extinguishing system, comprising an end-point test device for the automatic sprinkler fire extinguishing system, an alarm valve for the automatic sprinkler fire extinguishing system, an alarm valve action sensing circuit, a sprinkler head action sensing circuit at the most unfavorable point, a water filling time calculation module, and a display and transmission module. The water filling time calculation module is connected to the alarm valve action sensing circuit, the sprinkler head action sensing circuit at the most unfavorable point, and the display and transmission module, respectively. The end-point test device is connected to the sprinkler head action sensing circuit at the most unfavorable point, and the alarm valve is connected to the alarm valve action sensing circuit. The most unfavorable point nozzle action sensing circuit is used to collect pressure and flow signals after the end test device is activated, and convert the physical signals into electrical signals to be transmitted to the water filling time calculation module. The alarm valve action sensing circuit is used to collect the downstream pressure and flow signals after the alarm valve is activated, and convert the physical signals into electrical signals to be transmitted to the water filling time calculation module. The water filling time calculation module is used to receive electrical signals transmitted from the nozzle action sensing circuit and the alarm valve of the automatic sprinkler fire extinguishing system. After calculation and processing by the built-in program algorithm, the water filling time calculation result is displayed and the water filling time test value is transmitted to the display transmission module in the form of an electrical signal. The display and transmission module is used to display the water filling time test value, and at the same time transmits the water filling time test value to a computer or handheld terminal for display.

[0006] A method for implementing a water filling time testing device for an automatic sprinkler system includes the following steps: The end-point test device of the automatic sprinkler system is opened, and water begins to flow through it. Simultaneously, the sprinkler head action sensing circuit at the most unfavorable point collects the water flow rate and pressure values ​​of the end-point test device and transmits them to the water filling time calculation module. After the end-point test device has been continuously opened for a certain time, the alarm valve of the automatic sprinkler system opens, and water flows through it. The alarm valve action sensing circuit records the water flow rate and pressure flowing through the alarm valve in real time and transmits this data to the water filling time calculation module. When the flow rate of the end-point test device stabilizes and the pressure reaches the design value, the water filling time calculation module calculates the water filling time of the automatic sprinkler fire extinguishing system through its built-in program algorithm. At the same time, it compares the water filling time test value with the preset water filling time. When the water filling time test value is greater than the preset water filling time, the system water filling time is unqualified; when it is less than or equal to the preset water filling time, the system water filling time is qualified. The water filling time calculation module transmits the calculated time and judgment result to the display transmission module, which displays the water filling time test value and the result of whether the system water filling time is qualified.

[0007] The pressure reaches the design pressure value of ≥0.05MPa, with a fluctuation range within ±5%.

[0008] The preset water filling time is 1 minute or 2 minutes.

[0009] The water filling time calculation module calculates the water filling time of the automatic sprinkler fire extinguishing system using a built-in program algorithm, as follows: ; P1 represents the pressure value collected by the detection and acquisition module in the nozzle action sensing circuit at the most unfavorable point at time t1; P1 , The pressure value collected by the detection and acquisition module in the nozzle action sensing circuit represents the most unfavorable point at time (t1+0.1s). E1 represents the error between the pressure values ​​measured at time t1 and (t1+0.1s); Q1 represents the flow rate value collected by the detection and acquisition module in the nozzle action sensing circuit at the most unfavorable point at time t2; Q1 , The flow rate value collected by the detection and acquisition module in the nozzle action sensing circuit at the most unfavorable point at time (t2+0.1s) represents the flow rate value collected by the nozzle action sensing module. E2 represents the error between the flow rate measured at time t2 and time (t2+0.1s); P2 represents the pressure value collected by the detection and acquisition module in the alarm valve action sensing circuit at time t3; P2 , The pressure value collected by the detection and acquisition module in the nozzle action sensing circuit at the most unfavorable point at time (t3+0.1s) represents the pressure value collected at the most unfavorable point. E3 represents the error between the pressure values ​​measured at time t3 and (t3+0.1s); Q2 represents the flow rate value collected by the detection and acquisition module in the alarm valve action sensing circuit at time t4; Q2 , The flow rate value collected by the detection and acquisition module in the nozzle action sensing circuit at the most unfavorable point at time (t4+0.1s) represents the flow rate value collected by the nozzle action sensing module. E4 represents the error between the flow rate measured at time t4 and time (t4+0.1s); t A The point where the flow rate and pressure in the nozzle's motion sensing circuit are stable, and the error remains within ±5%, represents the most unfavorable point. A The value is the larger of t1 and t2; t B The time when the flow and pressure in the alarm valve's sensing circuit are stable, and the error remains within ±5%, is t. B The value is the larger of t1 and t2; t represents the system water filling time calculated by the built-in program algorithm of the water filling time test device.

[0010] The beneficial effects of this invention are as follows: This invention has a simple and reliable structure, high measurement accuracy (up to 0.01s), and can achieve unmanned automatic testing, solving the problem that existing technologies cannot automatically obtain high-precision water filling time. This invention is easily compatible with existing dry-pipe automatic sprinkler systems and pre-action automatic sprinkler systems. Water filling time testing can be performed before the automatic sprinkler system is put into use, during system testing, and during fire safety inspections. This invention integrates the characteristics of the water filling process and the water filling time requirements of dry-pipe and pre-action automatic sprinkler systems, establishing a testing device for verifying the effectiveness of the water filling time of automatic sprinkler systems and proposing a method for implementing water filling time testing, filling the gap in the current lack of testing and verification devices for the effectiveness of water filling time in automatic sprinkler systems. This invention can also assist in the selection and adjustment of automatic sprinkler system equipment, which is of great significance for improving the effectiveness of automatic sprinkler systems. Attached Figure Description

[0011] Figure 1 The circuit connection block diagram for implementing the present invention; Figure 2 This is a connection block diagram of the nozzle motion sensing circuit at the most unfavorable point of the present invention; Figure 3 This is a connection block diagram of the alarm valve action sensing circuit of the present invention; Figure 4 This is a connection block diagram of the water filling time calculation module of the present invention; Figure 5 This is a connection block diagram of the transmission module shown in the present invention; Figure 6 This is a schematic diagram of the system connection according to an embodiment of the present invention. Detailed Implementation

[0012] like Figure 1As shown, a water filling time testing device for an automatic sprinkler system includes an end-point test device for the automatic sprinkler system, an alarm valve for the automatic sprinkler system, an alarm valve action sensing circuit, a sprinkler head action sensing circuit at the most unfavorable point, a water filling time calculation module, and a display and transmission module.

[0013] like Figure 2 As shown, the nozzle action sensing circuit at the most unfavorable point consists of a power supply module I, a pressure sensor, a flow sensor, a detection and acquisition module I, a signal isolation module I, a signal processing module I, an auxiliary indicator module I, and a standard output module I. The power supply module I converts a DC 24V input to a 5V output, providing power to the pressure sensor, flow sensor, detection and acquisition module I, signal isolation module I, signal processing module I, auxiliary indicator module I, and standard output module I, and includes overcurrent, reverse connection, and grounding protection functions. The flow sensor and pressure sensor are connected to the detection and acquisition module I, which in turn connects to the standard output module I and auxiliary indicator module I via the signal isolation module I and signal processing module I, respectively. The flow sensor measures the flow rate of the water in the end-point test device and supplies power to the detection and acquisition module I. The pressure sensor measures the pressure of the water flow at the end-point test device and provides the pressure value to the detection and acquisition module I. The detection and acquisition module I uses a DN25, 0~5L / s, IP67 flow sensor and a 0~1.0MPa, 4~20mA, IP67 pressure sensor to collect the physical signals after the end-point test device is activated. It converts the flow signal into a pulse signal and the pressure signal into a current signal, and sends them to the signal isolation module I. The signal isolation module I is a dual-channel 4~20mA passive waterproof signal isolation module. Its function is dual-channel signal isolation, used to isolate pulse and current signals, eliminating electromagnetic interference from the water pump and distribution cabinet, and preventing signal drift and false triggering. It transmits the pulse and current signals to the signal processing module. Signal processing module I converts isolated pulse and current signals into standardized electrical signals, which are then transmitted to standard output module I and auxiliary indicator module I. Signal processing module I incorporates a small STM32F030 MCU core chip. Auxiliary indicator module I uses standardized electrical signals to provide feedback on the operating status of the nozzle action sensing circuit at the most unfavorable point. Standard output module I converts the standardized electrical signals into 4~20mA analog signals and sends them to the water filling time calculation module.

[0014] like Figure 3As shown, the alarm valve action sensing circuit consists of a power supply module II, a detection and acquisition module II, a signal isolation module II, a signal processing module II, an auxiliary display module II, and a standard output module II. The power supply module II converts a DC 24V input to a 5V output, providing power to the detection and acquisition module II, signal isolation module II, signal processing module II, auxiliary display module II, and standard output module II, and includes overcurrent, reverse connection, and grounding protection functions. The detection and acquisition module II is connected to the auxiliary display module II and the standard output module II sequentially through the signal isolation module II and the signal processing module II, respectively. The detection and acquisition module II is used to acquire the pressure and flow physical signals after the alarm valve opens, and simultaneously acquire the alarm valve's action switching quantity. The signal is sent to signal isolation module II; signal isolation module II is used to isolate electromagnetic interference from on-site water pumps and distribution cabinets to avoid signal drift / false triggering. It converts the received pressure and flow physical signals and alarm valve action switching signals into MCU-recognizable signals and sends them to signal processing module II; signal processing module II is used to complete the MCU-recognizable signal calibration and convert it into an electrical signal through the industrial-grade MCU main control STM32F103 chip, and send it to auxiliary indication module II and standard output module II; auxiliary indication module II provides feedback on the on-site status of the alarm valve action sensing circuit through electrical signals, which is convenient for operation and maintenance; standard output module II converts the electrical signal into a 4~20mA analog quantity and sends it to the water filling time calculation module.

[0015] like Figure 4 As shown, the water filling time calculation module consists of a power supply module III, a signal acquisition and isolation module, a core control and calculation module, a data storage module I, a signal output module, a status indication module I, and an auxiliary operation module; Power supply module III converts DC24V input to 5V output, providing power to the signal acquisition and isolation module, core control and calculation module, data storage module I, signal output module, status indication module I, and auxiliary operation module, with overcurrent, reverse connection, and grounding protection functions. The core control and calculation module is unidirectionally connected to the signal acquisition and isolation module, data storage module I, signal output module, and status indication module I, and bidirectionally connected to the auxiliary operation module. The signal acquisition and isolation module receives 4~20mA analog signals from the nozzle action sensing circuit and alarm valve action sensing circuit at the most unfavorable point, and then sends the isolated and filtered electrical signals to the core control and calculation module. The core control and calculation module uses an industrial-grade STM32F103RET6 MCU chip. The core control and calculation module receives the electrical signals from the acquisition and isolation module, determines the start and stop times of the timing, compares them with the preset water filling time, determines whether the water filling time test value is qualified, and transmits it to the data storage module I, status indication module I, signal output module, and auxiliary operation module. The data storage module I is used to buffer the water filling time test value to ensure that the data is not lost when power is off. Status indicator module I is used to display the water filling time test value; auxiliary operation module is used to select the system type and transmit it to the core control calculation module in the form of an electrical signal, and to calibrate the water filling time test value; signal output module is used to receive the water filling time test value calculated and processed by the core control calculation module and send it to the display transmission module.

[0016] like Figure 5 As shown, the display and transmission module consists of a power supply module IV, a signal receiving module, a control processing module, a local display module, a status indication module II, a data transmission module, and a data storage module II. The power supply module IV converts a DC 24V input to a 5V output, providing power to the signal receiving module, control processing module, local display module, status indication module II, data transmission module, and data storage module II, and includes overcurrent, reverse connection, and grounding protection functions. The signal receiving module is connected to the data transmission module, data storage module II, and status indication module II sequentially through the control processing module and the local display module, respectively. The signal receiving module receives the water filling time test value from the water filling time calculation module, eliminates electromagnetic interference, and sends it to the control processing module. The processing module receives the water filling time test value from the signal receiving module, parses it, runs the display logic program, and sends it to the local display module. The local display module receives the parsed water filling time test value from the control processing module, visualizes the water filling time test value, and transmits it to the data storage module II, the data transmission module, and the status indication module II. The data storage module II stores the water filling time test value transmitted by the local display module, supports historical data retrieval, and ensures that data is not lost in the event of power failure. The status indication module II receives the water filling time test value transmitted by the local display module and visualizes it for easy maintenance and troubleshooting. The data transmission module receives the water filling time test value transmitted by the local display module and uploads it to the computer, handheld terminal, and LoRa gateway.

[0017] like Figure 6 As shown in Example 1, for a certain dry automatic sprinkler system, the working process of the water filling time test device is as follows: The water filling time test device is turned on. In the water filling time calculation module, the system type is selected as dry automatic sprinkler system through the auxiliary operation module. The end-point test device is turned on for testing. First, gas is discharged from the end-point test device. At this time, the water filling time test device is triggered to start timing. When the pressure sensor in the most unfavorable point sprinkler action sensing circuit collects the pressure value of the outflow from the end-point test device, reaching the design pressure value of 0.06 MPa for the most unfavorable point sprinkler of the dry automatic sprinkler system, the time is recorded as 9 hours, 10 minutes, 30 seconds, and 23 seconds. At this time, the measured pressure value P1 is 0.06 MPa. Measurement continues, and after another 0.1 seconds, the measured pressure P1... , The value is 0.061 MPa. The measured pressure values ​​P1 and P1 are... ,The data is transmitted to the water filling time calculation module. The core control and operation module in the water filling time calculation module runs the water filling time calculation program to process the data. After calculation by formula (1), the error E1 is 1.67%. Since E1 is less than or equal to 5%, the value of t1 is 9 hours, 10 minutes, 30 seconds and 23 seconds. When the flow rate of the sprinkler head at the most unfavorable point stabilizes at 1 L / s under the design pressure, as detected by the flow sensor, the recording time is 9:10:31:23. At this time, Q1 is 1 L / s. Measurement continues, and after another 0.1 s, the measured flow rate value Q1 is... , The measured flow rates are 1.002 L / s, and the measured flow rates Q1 and Q1 are... , The data is transmitted to the water filling time calculation module. The core control calculation module in the water filling time calculation module calculates the error E2 using formula (2) and obtains that E2 is 3.33%. Since E2 is less than or equal to 5%, t2 is taken as 9 hours, 10 minutes, 31 seconds, and 23 seconds. When the detection and acquisition module II in the alarm valve action sensing circuit detects that the pressure of the alarm valve is stable, the recorded time is 9 hours, 11 minutes, 12 seconds, and 23 seconds. The pressure value P2 is 0.65 MPa. The measurement continues, and after another 0.1 seconds, the measured pressure value P2 is... , The pressure is 0.651 MPa. The measured pressure values ​​P2 and P2 are... , The data is transmitted to the water filling time calculation module. The core control and calculation module in the water filling time calculation module runs the water filling time calculation program to process the data. After calculation by formula (3), the error E3 is 0.15%. Since E3 is less than or equal to 5%, the value of t3 is 9 hours, 11 minutes, 12 seconds, and 23 seconds. When the flow rate collected by the detection and acquisition module II in the alarm valve action sensing circuit is stable, the recording time is 9 hours, 11 minutes, 22 seconds, and 23 seconds. At this time, the measured flow rate Q2 is 1.002 L / s. After another 0.1 seconds, the measured flow rate Q2 is 1.002 L / s. After another 0.1 seconds, the measured flow rate Q2 is 1.002 L / s. , The measured flow rates are 1.004 L / s, and the measured flow rates are Q2 and Q2. , The data is transmitted to the water filling time calculation module. The core control calculation module in the water filling time calculation module calculates the error E3 by formula (4). Since E3 is less than or equal to 5%, the value of t4 is 9 hours, 11 minutes, 12 seconds and 23 seconds. The values ​​of t1 and t2 are transmitted to the water filling time calculation module. The core control calculation module in the water filling time calculation module calculates t using formula (5) to obtain t. A The time is 9:10:31:23; the values ​​of t3 and t4 are transmitted to the water filling time calculation module. The core control calculation module in the water filling time calculation module calculates t using formula (6) to obtain t. B The time is 9:11:22:23; t A and t BThe value is transmitted to the water filling time calculation module. The core control operation module in the water filling time calculation module calculates the water filling time test value t as 51s using formula (7). The auxiliary operation module in the water filling time calculation module calibrates the water filling time test value t. After calibration, the core control operation module in the water filling time calculation module compares the water filling time test value t=51s with the preset water filling time of 1min. The water filling time test value t of the dry automatic sprinkler fire extinguishing system is less than the preset time of 1min for the dry system, so the water filling time is qualified. The water filling time calculation module transmits the calculated time and judgment result to the display transmission module; the display transmission module parses the data, runs the display logic program, and sends the water filling time test value to the local display module; the local display module displays the water filling time test value t=51s and the result that the system water filling time is qualified, and stores the test data through the data storage module II; the data transmission module uploads the water filling time test value and qualified result data to the computer / handheld terminal / LORA gateway.

[0018] Example 2: For a certain double-interlocked pre-action system, the working process of the water filling time test device is as follows: The water filling time test device is turned on. In the water filling time calculation module, the system type is selected as a double-interlocked pre-action system through the auxiliary operation module. The fire detector above the protected area of ​​the double-interlocked pre-action system is manually triggered. The tester opens the end-of-line test device. First, gas is discharged from the end-of-line test device. At this time, the water filling time test device is triggered to start timing. After the fire detector activates, it sends an alarm signal to the fire alarm controller. The fire alarm controller sends a signal to the pre-action control panel. After the end-of-line test device is opened, the pressure in the system pipeline continues to decrease, and the double-interlocked pre-action system is filled with gas. The pressure switch on the pipeline actuates, sending one signal to start the fire pump and another signal to the pre-action control panel. Upon receiving the alarm signal and the pressure switch's actuation signal, the pre-action control panel opens the alarm valve to fill the system-side pipeline with water, accelerating the air venting and water filling process within the system pipeline. When the pressure sensor in the sprinkler activation sensing circuit at the most unfavorable point detects that the pressure value of the outflow from the end-of-line test device reaches the design pressure value of 0.05 MPa for the most unfavorable point sprinkler of the double-interlocked pre-action system, the recording time is 15 hours, 10 minutes, 11 seconds, and 23 seconds. At this time, the measured pressure value P1 is 0.05 MPa. Measurement continues, and after another 0.1 seconds, the measured pressure value P1... , The pressure is 0.051 MPa. The measured pressure values ​​P1 and P1 are... , The data is transmitted to the water filling time calculation module. The core control and operation module in the water filling time calculation module runs the water filling time calculation program to process the data. After calculation by formula (1), the error E1 is 2.00%. Since E1 is less than or equal to 5%, the value of t1 is 15 hours, 10 minutes, 11 seconds and 23 seconds. When the flow rate of the sprinkler head at the most unfavorable point stabilizes at 0.94 L / s under the design pressure, as detected by the flow sensor, the recording time is 15 hours, 10 minutes, and 31.23 seconds. At this time, Q1 is 0.94 L / s. Measurement continues, and after another 0.1 seconds, the measured flow rate value Q1 is... , The measured flow rates are 0.942 L / s. The measured flow rates Q1 and Q1 are... , The data is transmitted to the water filling time calculation module. The core control calculation module in the water filling time calculation module calculates the error E2 using formula (2) and obtains that E2 is 0.21%. Since E2 is less than or equal to 5%, t2 is taken as 15 hours, 10 minutes, 31 seconds, and 23 seconds. When the detection and acquisition module II in the alarm valve action sensing circuit detects that the pressure of the alarm valve is stable, the recorded time is 15 hours, 11 minutes, and 06 seconds, and the pressure value P2 is 0.64 MPa. The measurement continues, and after another 0.1 seconds, the measured pressure value P2 is... , The pressure is 0.642 MPa. The measured pressure values ​​P2 and P2 are... , The data is transmitted to the water filling time calculation module. The core control and calculation module in the water filling time calculation module runs the water filling time calculation program to process the data. After calculation by formula (3), the error E3 is 0.31%. Since E3 is less than or equal to 5%, the value of t3 is 15 hours, 11 minutes, 06 seconds, and 23 seconds. When the flow rate collected by the detection and acquisition module II in the alarm valve action sensing circuit is stable, the recording time is 15 hours, 11 minutes, 26 seconds, and 23 seconds. At this time, the measured flow rate Q2 is 0.96 L / s. After another 0.1 seconds, the measured flow rate Q2 is 0.96 L / s. After another 0.1 seconds, the measured flow rate Q2 is 0.96 L / s. , The measured flow rates are 0.962 L / s, and the measured flow rates are Q2 and Q2. , The data is transmitted to the water filling time calculation module. The core control calculation module in the water filling time calculation module calculates the error E3 by formula (4). Since E3 is less than or equal to 5%, the value of t4 is 15 hours, 11 minutes, 26 seconds, and 23 seconds. The values ​​of t1 and t2 are transmitted to the water filling time calculation module. The core control calculation module in the water filling time calculation module calculates t using formula (5) to obtain t. A The value of t3 is 15:10:31:23; the values ​​of t3 and t4 are transmitted to the water filling time calculation module. The core control calculation module in the water filling time calculation module calculates t using formula (6) to obtain t. B The time is 15:11:26:23; t A and t BThe value is transmitted to the water filling time calculation module. The core control operation module in the water filling time calculation module calculates the water filling time test value t as 55s using formula (7). The auxiliary operation module in the water filling time calculation module calibrates the water filling time test value t. After calibration, the core control operation module in the water filling time calculation module compares the water filling time test value t=51s with the preset water filling time of 1min. The water filling time test value t of the double interlock pre-action system is less than the preset time of 1min of the double interlock pre-action system, so the water filling time is qualified. The water filling time calculation module transmits the calculated time and judgment result to the display transmission module; the display transmission module parses the data, runs the display logic program, and sends the water filling time test value to the local display module. The local display module displays the water filling time test value t=55s and the result that the system water filling time is qualified, and stores the test data through the data storage module II. The data transmission module uploads the water filling time test value and the qualified result data to the computer / handheld terminal / LORA gateway.

[0019] Example 3: For a certain single-interlock pre-action system, the working process of the water filling time test device is as follows: The water filling time test device is turned on. In the water filling time calculation module, the system type is selected as a single-interlock pre-action system through the auxiliary operation module. The fire detector above the protected area of ​​the single-interlock pre-action system is manually triggered. The tester opens the end-point test device. First, gas is discharged from the end-point test device. At this time, the water filling time test device is triggered to start timing. After the end-point test device is opened, the pressure in the system pipeline continues to decrease. After the fire detector is activated, it sends an alarm signal to the fire alarm controller. The fire alarm controller then activates the alarm valve and fire pump to fill the system side pipeline with water, accelerating the venting and water filling process in the system pipeline. When the pressure sensor in the most unfavorable point sprinkler action sensing circuit collects the pressure value of the outflow from the end-point test device, reaching the design pressure value of 0.05 MPa for the most unfavorable point sprinkler of the single-interlock pre-action system, the recording time is 8 hours, 10 minutes, 11 seconds, and 23 seconds. At this time, the measured pressure value P1 is 0.05 MPa. Measurement continues, and after another 0.1 seconds, the measured pressure value P1... , The pressure is 0.052 MPa. The measured pressure values ​​P1 and P1 are... , The data is transmitted to the water filling time calculation module. The core control and operation module in the water filling time calculation module runs the water filling time calculation program to process the data. After calculation by formula (1), the error E1 is 4.00%. Since E1 is less than or equal to 5%, the value of t1 is 8 hours, 10 minutes, 11 seconds and 23 seconds. When the flow rate of the sprinkler head at the most unfavorable point stabilizes at 0.94 L / s under the design pressure, as detected by the flow sensor, the recording time is 8 hours, 10 minutes, and 31.23 seconds. At this time, Q1 is 0.94 L / s. Measurement continues, and after another 0.1 seconds, the measured flow rate value Q1 is... , The measured flow rates are 0.942 L / s. The measured flow rates Q1 and Q1 are... , The data is transmitted to the water filling time calculation module. The core control calculation module in the water filling time calculation module calculates the error E2 using formula (2) and obtains that E2 is 0.21%. Since E2 is less than or equal to 5%, t2 is taken as 8 hours, 10 minutes, 31 seconds, and 23 seconds. When the detection and acquisition module II in the alarm valve action sensing circuit detects that the pressure of the alarm valve is stable, the recorded time is 8 hours, 12 minutes, 35 seconds, and the pressure value P2 is 0.60 MPa. After 0.1 seconds of measurement, the measured pressure value P2 is 0.60 MPa. , The pressure is 0.602 MPa. The measured pressure values ​​P2 and P2 are... , The data is transmitted to the water filling time calculation module. The core control and calculation module in the water filling time calculation module runs the water filling time calculation program to process the data. After calculation by formula (3), the error E3 is 0.33%. Since E3 is less than or equal to 5%, the value of t3 is 8 hours, 12 minutes, 35 seconds, and 23 seconds. When the flow rate collected by the detection and acquisition module II in the alarm valve action sensing circuit is stable, the recording time is 8 hours, 12 minutes, 45 seconds, and 23 seconds. At this time, the measured flow rate Q2 is 0.945 L / s. After another 0.1 seconds, the measured flow rate Q2 is 0.945 L / s. After another 0.1 seconds, the measured flow rate Q2 is 0.945 L / s. , The measured flow rate is 0.948 L / s, and the measured flow rate value Q2 is... , and Q2 , The values ​​of t1 and t2 are transmitted to the water filling time calculation module. The core control calculation module in the water filling time calculation module calculates the error E3 using formula (4), which is 0.32%. Since E3 is less than or equal to 5%, the value of t4 is 8 hours, 12 minutes, 45 seconds, and 23 seconds. The values ​​of t1 and t2 are transmitted to the water filling time calculation module. The core control calculation module in the water filling time calculation module calculates the error E3 using formula (5), which is 0.32%. Since E3 is less than or equal to 5%, the value of t4 is 8 hours, 12 minutes, 45 seconds, and 23 seconds. A The time is 8 hours, 10 minutes, 31.23 seconds. The values ​​of t3 and t4 are transmitted to the water filling time calculation module. The core control calculation module in the water filling time calculation module calculates t using formula (6). B The time is 8 hours, 12 minutes, 45.23 seconds; t A and t BThe value is transmitted to the water filling time calculation module. The core control operation module in the water filling time calculation module calculates the water filling time test value t as 134s using formula (7). The auxiliary operation module in the water filling time calculation module calibrates the water filling time test value t. After calibration, the core control operation module in the water filling time calculation module compares the water filling time test value t=51s with the preset water filling time of 2min. The water filling time test value t of the single interlock pre-action system is less than the preset time of 2min for the single interlock pre-action, so the water filling time is qualified. The water filling time calculation module transmits the calculated time and judgment result to the display transmission module; the display transmission module parses the data, runs the display logic program, and sends the water filling time test value to the local display module; the local display module displays the water filling time test value t=134s and the result that the system water filling time is qualified, and stores the test data through the data storage module II; the data transmission module uploads the water filling time test value and qualified result data to the computer / handheld terminal / LORA gateway.

Claims

1. A device for testing the water filling time of an automatic sprinkler system, comprising an end-of-line test device for the automatic sprinkler system and an alarm valve for the automatic sprinkler system, characterized in that, It also includes an alarm valve action sensing circuit, a sprinkler head action sensing circuit at the most unfavorable point, a water filling time calculation module, and a display and transmission module. The water filling time calculation module is connected to the alarm valve action sensing circuit, the sprinkler head action sensing circuit at the most unfavorable point, and the display and transmission module, respectively. The end water test device is connected to the sprinkler head action sensing circuit at the most unfavorable point, and the alarm valve is connected to the alarm valve action sensing circuit. The most unfavorable point nozzle action sensing circuit is used to collect pressure and flow signals after the end test device is activated, and convert the physical signals into electrical signals to be transmitted to the water filling time calculation module. The alarm valve action sensing circuit is used to collect the downstream pressure and flow signals after the alarm valve is activated, and convert the physical signals into electrical signals to be transmitted to the water filling time calculation module. The water filling time calculation module is used to receive electrical signals transmitted from the nozzle action sensing circuit and the alarm valve of the automatic sprinkler fire extinguishing system. After calculation and processing by the built-in program algorithm, the water filling time calculation result is displayed and the water filling time test value is transmitted to the display transmission module in the form of an electrical signal. The display and transmission module is used to display the water filling time test value, and at the same time transmits the water filling time test value to a computer or handheld terminal for display.

2. The water filling time testing device for an automatic sprinkler fire extinguishing system according to claim 1, characterized in that, The nozzle motion sensing circuit at the most unfavorable point consists of a power supply module I, a pressure sensor, a flow sensor, a detection and acquisition module I, a signal isolation module I, a signal processing module I, an auxiliary indication module I, and a standard output module I. The power supply module I provides power to the pressure sensor, flow sensor, detection and acquisition module I, signal isolation module I, signal processing module I, auxiliary indication module I, and standard output module I. The flow sensor and pressure sensor are respectively connected to the detection and acquisition module I. The detection and acquisition module I is connected to the standard output module I and the auxiliary indication module I through the signal isolation module I and the signal processing module I, respectively. The flow sensor is used to measure the flow rate of the water in the end-of-line test device and provide the flow rate value to the detection and acquisition module I. The pressure sensor is used to measure the pressure of the water in the end-of-line test device and provide the pressure value to the detection and acquisition module I. The detection and acquisition module I is used to collect the physical signals after the end-of-line test device is activated through the flow sensor and pressure sensor, convert the flow signal into a pulse signal and the pressure signal into a current signal, and send them to the signal isolation module I. The signal isolation module I is used to isolate pulse signals and current signals, eliminate electromagnetic interference from on-site water pumps and power distribution cabinets, prevent signal drift and false triggering, and transmit pulse signals and current signals to the signal processing module. The signal processing module I is used to convert the isolated pulse signal and current signal into a standardized electrical signal and transmit it to the standard output module I and the auxiliary indicator module I. The auxiliary indicator module I uses the standardized electrical signal to provide feedback on the working status of the nozzle action sensing circuit at the most unfavorable point. The standard output module I converts the standardized electrical signal into a 4~20mA analog quantity and sends it to the water filling time calculation module.

3. The water filling time testing device for an automatic sprinkler fire extinguishing system according to claim 1, characterized in that, The alarm valve action sensing circuit consists of a power supply module II, a detection and acquisition module II, a signal isolation module II, a signal processing module II, an auxiliary display module II, and a standard output module II. The power supply module II provides power to the detection and acquisition module II, the signal isolation module II, the signal processing module II, the auxiliary display module II, and the standard output module II. The detection and acquisition module II is connected to the auxiliary display module II and the standard output module II in sequence through the signal isolation module II and the signal processing module II, respectively. The detection and acquisition module II is used to collect the physical signals of pressure and flow after the alarm valve is opened, and simultaneously collect the alarm valve's action switch quantity, which is then sent to the signal isolation module II. The signal isolation module II is used to isolate electromagnetic interference from the on-site water pump and power distribution cabinet to avoid signal drift / false triggering. It converts the received physical signals of pressure and flow and the alarm valve's action switch quantity into MCU-recognizable signals and sends them to the signal processing module II. The signal processing module II is used to calibrate the MCU-recognizable signals using the industrial-grade MCU main control STM32F103 chip and convert them into electrical signals, which are then sent to the auxiliary indication module II and the standard output module II. The auxiliary indication module II provides feedback on the on-site status of the alarm valve action sensing circuit through electrical signals, facilitating operation and maintenance. The standard output module II converts the electrical signals into 4~20mA analog quantities and sends them to the water filling time calculation module.

4. The water filling time testing device for an automatic sprinkler fire extinguishing system according to claim 1, characterized in that, The water filling time calculation module consists of a power supply module III, a signal acquisition and isolation module, a core control and calculation module, a data storage module I, a signal output module, a status indication module I, and an auxiliary operation module. The power supply module III provides power to the signal acquisition and isolation module, the core control and calculation module, the data storage module I, the signal output module, the status indication module I, and the auxiliary operation module. The core control and calculation module is unidirectionally connected to the signal acquisition and isolation module, the data storage module I, the signal output module, and the status indication module I, and bidirectionally connected to the auxiliary operation module. The signal acquisition and isolation module receives 4-20mA analog signals from the nozzle action sensing circuit and alarm valve action sensing circuit at the most unfavorable point, respectively. It then isolates and filters these analog signals before sending the resulting electrical signal to the core control and calculation module. The core control and calculation module receives the electrical signal from the acquisition and isolation module, determines the start and stop times of the timing, compares it with the preset water filling time, and determines whether the water filling time test value is qualified. The result is then transmitted to the data storage module I, status indication module I, signal output module, and auxiliary operation module. The data storage module I caches the water filling time test value to ensure that data is not lost in the event of power failure. The status indicator module I is used to display the water filling time test value; the auxiliary operation module is used to select the system type and transmit it to the core control and calculation module in the form of an electrical signal, and to calibrate the water filling time test value; the signal output module is used to receive the water filling time test value calculated and processed by the core control and calculation module, and send it to the display and transmission module.

5. The water filling time testing device for an automatic sprinkler fire extinguishing system according to claim 1, characterized in that, The display transmission module consists of a power supply module IV, a signal receiving module, a control processing module, a local display module, a status indication module II, a data transmission module, and a data storage module II. The power supply module IV provides power to the signal receiving module, the control processing module, the local display module, the status indication module II, the data transmission module, and the data storage module II, respectively. The signal receiving module is connected to the data transmission module, the data storage module II, and the status indication module II, respectively, through the control processing module and the local display module. The signal receiving module is used to receive the water filling time test value from the water filling time calculation module, eliminate electromagnetic interference, and send it to the control processing module. The control processing module receives the water filling time test value from the signal receiving module, parses it, runs the display logic program, and sends it to the local display module. The local display module receives the parsed water filling time test value from the control processing module, visualizes the water filling time test value, and transmits it to the data storage module II, the data transmission module, and the status indication module II. The data storage module II stores the water filling time test value transmitted by the local display module, supports historical data retrieval, and ensures that data is not lost in the event of power failure. The status indication module II is used to receive and visualize the water filling time test value transmitted by the local display module, which facilitates operation and maintenance troubleshooting; the data transmission module is used to receive the water filling time test value transmitted by the local display module and upload it to the computer, handheld terminal and LoRa gateway.

6. A method for implementing the water filling time testing device for an automatic sprinkler fire extinguishing system as described in claim 1, characterized in that, The steps are as follows: When the end-point test device of the automatic sprinkler system is opened, water begins to flow through it. Simultaneously, the action sensing circuit of the sprinkler head at the most unfavorable point collects the water flow rate and pressure values ​​of the end-point test device and transmits them to the filling time calculation module. After the end-point test device has been continuously opened for a certain period of time, the alarm valve of the automatic sprinkler system opens, and water flows through it. The alarm valve action sensing circuit records the water flow rate and pressure flowing through the alarm valve in real time and transmits them to the filling time calculation module. When the flow rate of the end-point test device stabilizes and the pressure reaches the design pressure value, the water filling time calculation module calculates the water filling time of the automatic sprinkler fire extinguishing system through its built-in program algorithm. At the same time, it compares the water filling time test value with the preset water filling time. When the water filling time test value is greater than the preset water filling time, the system water filling time is unqualified; when it is less than or equal to the preset water filling time, the system water filling time is qualified. The water filling time calculation module transmits the calculated time and judgment result to the display transmission module, which displays the water filling time test value and the result of whether the system water filling time is qualified.

7. The method for implementing the water filling time testing device for an automatic sprinkler fire extinguishing system according to claim 6, characterized in that, The pressure reaches the design pressure value of ≥0.05MPa, with a fluctuation range within ±5%.

8. The method for implementing the water filling time testing device for an automatic sprinkler fire extinguishing system according to claim 6, characterized in that, The preset water filling time is 1 minute or 2 minutes.

9. The method for implementing the water filling time testing device for an automatic sprinkler fire extinguishing system according to claim 6, characterized in that, The water filling time calculation module calculates the water filling time of the automatic sprinkler fire extinguishing system using a built-in program algorithm, as follows: ； P1 represents the pressure value collected by the detection and acquisition module in the nozzle action sensing circuit at the most unfavorable point at time t1; P1 , The pressure value collected by the detection and acquisition module in the nozzle action sensing circuit represents the most unfavorable point at time (t1+0.1s). E1 represents the error between the pressure values ​​measured at time t1 and (t1+0.1s); Q1 represents the flow rate value collected by the detection and acquisition module in the nozzle action sensing circuit at the most unfavorable point at time t2; Q1 , The flow rate value collected by the detection and acquisition module in the nozzle action sensing circuit at the most unfavorable point at time (t2+0.1s) represents the flow rate value collected by the nozzle action sensing module. E2 represents the error between the flow rate measured at time t2 and time (t2+0.1s); P2 represents the pressure value collected by the detection and acquisition module in the alarm valve action sensing circuit at time t3; P2 , The pressure value collected by the detection and acquisition module in the nozzle action sensing circuit at the most unfavorable point at time (t3+0.1s) represents the pressure value collected at the most unfavorable point. E3 represents the error between the pressure values ​​measured at time t3 and (t3+0.1s); Q2 represents the flow rate value collected by the detection and acquisition module in the alarm valve action sensing circuit at time t4; Q2 , The flow rate value collected by the detection and acquisition module in the nozzle action sensing circuit at the most unfavorable point at time (t4+0.1s) represents the flow rate value collected by the nozzle action sensing module. E4 represents the error between the flow rate measured at time t4 and time (t4+0.1s); t A The point where the flow rate and pressure in the nozzle's motion sensing circuit are stable, and the error remains within ±5%, represents the most unfavorable point. A The larger of t1 and t2; t B The time when the flow and pressure in the alarm valve's sensing circuit are stable, and the error remains within ±5%, is t. B The value is the larger of t1 and t2; t represents the system water filling time calculated by the built-in program algorithm of the water filling time test device.

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