Automatic water spraying fire extinguishing experiment device and method, storage medium and program product

Abstract

The invention provides an automatic water-spraying fire-extinguishing experimental device and method, a storage medium and a program product, the automatic water-spraying fire-extinguishing experimental device comprises a water supply module, a water pump control module and an automatic water spraying module which are communicated in sequence, the water supply module comprises a water tank, and the water tank supplies experimental water in real time; the water pump control module comprises a water pump; the automatic water spraying module is communicated with the water outlet end of the water pump, the automatic water spraying module is of a hydraulic equilibrium pipe network structure and comprises an automatic water spraying main pipe, a plurality of water spraying branch pipes and a plurality of sprayers which are communicated in sequence, the automatic water spraying main pipe is provided with a first node, and the distances from the sprayers to the first node are the same, so that a hydraulic equilibrium system is formed. The automatic water spraying module of a hydraulic equilibrium pipe network structure is adopted, so that the water outlet uniformity and reliability of the spray heads are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of automatic fire extinguishing, in particular to an automatic water spray fire extinguishing experimental device, method, storage medium and program product. Background Art

[0002] The automatic sprinkler fire extinguishing system is the most energy-efficient and economically reasonable automatic fire extinguishing system discovered so far. Its energy efficiency is determined by the product of the water spray intensity and the effective area. In order to obtain the best economically reasonable energy efficiency parameters, a large number of experimental verifications are required. Most of the existing fire extinguishing experimental devices are supplied by branched pipe networks of unbalanced pipe networks, which have the problem of low water supply reliability and are not suitable for different water spray intensities, resulting in different flow and pressure parameters in the experimental device, making the design of the experimental water supply device extremely complicated. At present, it is not possible to use the same experimental device to realize fire extinguishing experiments under different water spray intensities or different hazard levels. Summary of the invention

[0003] In view of the deficiencies in the existing fire extinguishing test device technology, the present invention provides an automatic water sprinkler fire extinguishing test device, method, storage medium and program product, which solves the problems that the existing fire extinguishing test devices mostly use non-balanced pipe networks with branched pipe networks for water supply, uneven water spraying, low reliability of test data and complex water supply devices.

[0004] To achieve the above-mentioned purpose, the present invention provides an automatic water sprinkler fire extinguishing experimental device on the one hand, comprising a water supply module, a water pump control module and an automatic water sprinkler module connected in sequence, the water supply module comprising a water tank, and the water tank supplies experimental water in real time; the water pump control module comprises a water pump, the water inlet end of the water pump is connected to the water tank, and the number of the water pumps is multiple; the automatic water sprinkler module is connected to the water outlet end of the water pump, and the automatic water sprinkler module is a hydraulically balanced pipe network structure, comprising an automatic water sprinkler main pipe, multiple water sprinkler branches and multiple nozzles connected in sequence, the automatic water sprinkler main pipe has a first node, and the distances from the multiple nozzles to the first node are all the same.

[0005] The equivalent lengths of the pipelines from the multiple nozzles to the water pump are the same.

[0006] The distance between each two adjacent nozzles is the same.

[0007] The water pump control module also includes a flow sensor, which is arranged on the automatic sprinkler main pipe.

[0008] The water pump control module includes a variable frequency control system electrically connected to the water pump and the flow sensor.

[0009] The frequency conversion control system includes a PLC control system, a PID regulator and a frequency converter, the flow sensor is connected to the input end of the PLC control system, the output end of the PLC control system is connected to the input end of the PID regulator, the output end of the PID regulator is connected to the water pump through the frequency converter, and the PLC control system is connected to the frequency converter.

[0010] The water pumps include a first water pump, a second water pump and a third water pump.

[0011] On the other hand, the present invention also provides an automatic water sprinkler fire extinguishing test method, which adopts the above-mentioned automatic water sprinkler fire extinguishing test device, and includes the following steps: a nozzle arrangement step, using the hydraulic balance pipe network structure to arrange the nozzles; a hydraulic calculation step, calculating the hydraulic parameters under different water spraying intensities or different danger levels; a pump selection step, selecting the corresponding water pump according to the hydraulic parameters.

[0012] The hydraulic parameters include one or a combination of flow rate, working pressure, pipe diameter, flow rate, head loss and water pump head.

[0013] The pump selection step also includes the following steps: setting the flow threshold interval under different water spray intensities or different danger levels according to hydraulic parameters; detecting the actual flow and determining the flow threshold interval in which the actual flow is located; and selecting the corresponding water pump according to the flow threshold interval in which the actual flow is located.

[0014] The water spray intensity is 8L / (min·m 2 )、5.6L / (min·m 2 )、4L / (min·m 2 ), the flow threshold ranges are: 0~62.17m 3 / h, 0~43.91m 3 / h, 0~31.36m 3 / h; select the corresponding first water pump, second water pump or third water pump according to the actual flow rate, and adjust the frequency according to the corresponding actual flow rate.

[0015] On the other hand, the present invention also provides a computer-readable storage medium, which carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement the steps of the automatic sprinkler fire extinguishing experimental method as described above.

[0016] On the other hand, the present invention also provides a computer program product, including computer-readable instructions, which, when executed on an electronic device, enable the electronic device to implement the steps of the automatic sprinkler fire extinguishing experimental method.

[0017] It can be seen from the above scheme that the advantages of the present invention are:

[0018] The present invention adopts an automatic water spraying module with a hydraulically balanced pipe network structure, thereby improving the reliability of water supply.

[0019] The automatic water spray fire extinguishing test device of the present invention can realize fire extinguishing tests under different water spraying intensities or different danger levels, thus saving resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1A It is a plan view of the automatic sprinkler fire extinguishing experimental device of the present invention;

[0021] Figure 1B A three-dimensional diagram of the automatic sprinkler fire extinguishing experimental device of the present invention;

[0022] Figure 2 This is the structural diagram of the water pump control module;

[0023] Figure 3 It is a flow chart of the automatic sprinkler fire extinguishing experimental method of the present invention;

[0024] Figure 4 for Figure 3 Flow chart of the steps for selecting a pump;

[0025] Figure 5 A plan view of the sprinkler layout;

[0026] FIG. 6A to FIG. 6E This is the relationship diagram between the water flow rate and head of different water pumps at different water spray intensities and different speeds;

[0027] Fig. 7A The water spray intensity is 8L / (min·m 2 ) Flow chart of the pump selection steps in the automatic sprinkler fire extinguishing test method;

[0028] Figure 7B The water spray intensity is 5.6L / (min·m 2 ) Flow chart of the pump selection steps in the automatic sprinkler fire extinguishing test method;

[0029] Figure 7C The water spray intensity is 4L / (min·m 2 ) Flow chart of the pump selection steps in the automatic sprinkler fire extinguishing test method;

[0030] Wherein, the reference numerals are:

[0031] 1'-Automatic sprinkler fire extinguishing test device;

[0032] 1~10-nodes;

[0033] 10'-water supply module;

[0034] 100-base;

[0035] 101- water tank;

[0036] 11- Water pump control module;

[0037] 110-water pump;

[0038] 1100-first water pump;

[0039] 1101- second water pump;

[0040] 1102- the third water pump;

[0041] 112- flow sensor;

[0042] 113- Frequency conversion control system;

[0043] 1130-PLC control system;

[0044] 1131-PID regulator;

[0045] 1132-Inverter;

[0046] 12-Automatic water spray module;

[0047] 120-Automatic sprinkler main;

[0048] 121-Spray branch pipe;

[0049] 122-nozzle;

[0050] S10~S30, S300~S302-steps. DETAILED DESCRIPTION

[0051] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of the present invention, but it is not intended to limit the scope of protection of the claims attached to the present invention.

[0052] References to "an embodiment", "another embodiment", "this embodiment", etc. in the specification refer to the embodiment being described which may include specific features, structures or characteristics, but not every embodiment must include these specific features, structures or characteristics. In addition, such expressions do not refer to the same embodiment. Furthermore, when describing specific features, structures or characteristics in conjunction with an embodiment, whether or not there is an explicit description, it is indicated that incorporating such features, structures or characteristics into other embodiments is within the knowledge of those skilled in the art.

[0053] Certain words are used in the specification and subsequent claims to refer to specific components or parts. People of ordinary skill in the art should understand that technical users or manufacturers can refer to the same component or part with different nouns or terms. This specification and claims do not use differences in names as a way to distinguish components or parts, but use differences in the functions of components or parts as the criteria for distinction. "Including" and "including" mentioned throughout the specification and claims are open-ended terms and should be interpreted as "including but not limited to". In addition, the word "connected" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connection through other devices.

[0054] The technical problem solved by the present invention is that, on the one hand, the water supply reliability of the existing fire extinguishing test device is low, and on the other hand, the same device cannot realize fire extinguishing tests under different water spraying intensities or different danger levels.

[0055] The overall idea of ​​the technical solution provided by the present invention to solve the above problems is as follows:

[0056] The water distribution pipe of the automatic water sprinkler fire extinguishing test device 1' is designed with a hydraulically balanced pipe network structure, so that the length from each sprinkler to the water pump is consistent, and the equivalent length is also consistent; at the same time, during the experiment, the flow rate of each sprinkler under different working conditions of water spraying intensity is ensured to be consistent, ensuring the consistency of the sprinkler flow rate during the experiment;

[0057] Calculate the design flow and pressure of the automatic sprinkler fire extinguishing experimental device 1' under different water spraying intensities or different danger levels respectively;

[0058] Select the corresponding water pump according to different pressures and different flows, and provide the water pump control mode under different working conditions;

[0059] The same hazard level can test the fire extinguishing effect of different water spray intensities. For example, the water spray intensity specified in the II hazard level specification is 8L / (min·m 2 ), according to the principle of effective reduction, 5.6L / (min·m 2 ), 4.0L / (min·m 2 ) to study and analyze more reasonable energy efficiency parameters. At the same time, the automatic sprinkler fire extinguishing test device 1' of the present invention can also be used for the water spray intensity of 6L / (min·m 2 ), the water spray intensity specified in the light hazard level specification is 4L / (min·m 2 ) and other fire extinguishing experiments with optimal energy efficiency;

[0060] As the scale of the fire increases, the number of water sprays opened will gradually increase. In order to meet the requirements of fire extinguishing, a variable frequency water supply mode that adjusts the pressure according to the flow rate is adopted to adapt to the pressure changes caused by opening different numbers of sprinklers to ensure that the water spray intensity remains unchanged.

[0061] Please refer to Figure 1A and Figure 1B ,in, Figure 1A A plan view of an automatic water sprinkler fire extinguishing experimental device 1' provided in an embodiment of the present invention, Figure 1B It is a three-dimensional diagram of the automatic sprinkler fire extinguishing experimental device 1'.

[0062] The automatic sprinkler fire extinguishing experimental device 1' comprises a water supply module 10', a water pump control module 11 and an automatic sprinkler module 12 which are connected in sequence, wherein the water supply module 10' comprises a base 100 and a water tank 101 installed on the base 100, the water tank 101 is a stainless steel water tank, and can supply experimental water in real time; the water pump control module 11 comprises a water pump 110, the water inlet end of the water pump 110 is connected to the water tank 101, and the water outlet end is connected to the sprinkler module 12, the number of water pumps 110 is multiple, including a first water pump 1100, a second water pump 1101 and a third water pump 1102; the automatic sprinkler module 12 is a hydraulically balanced pipe network structure, comprising an automatic sprinkler main pipe 120, a plurality of sprinkler branches 121 and a plurality of sprinkler heads 122 which are connected in sequence, the automatic sprinkler main pipe 120 has a node 9 (i.e., a first node), and the distances from all sprinkler heads 122 to the node 9 are the same, that is, the distances from all sprinkler heads 122 to the water pump 110 are the same. The equivalent lengths of the pipelines from all nozzles 122 to the water pump 110 are the same, and the spacing between every two adjacent nozzles 122 is also the same. The hydraulic balance pipe network structure thus formed has high water supply reliability. FIG1 also shows nodes 1 to 8 and 10 of the hydraulic balance pipe network structure, which are used for the calculation of subsequent pipe sections.

[0063] In this embodiment, the water pump control module 11 also includes a flow sensor 112 and a pressure sensor (not shown). The flow sensor 112 uses a flow meter such as an LWGY-B series intelligent vortex flow meter. The flow sensor 112 is arranged on the automatic sprinkler main pipe 120 to monitor the actual flow Q of the automatic sprinkler main pipe 120. The pressure sensor is, for example, MIK-P300, which is also arranged on the automatic sprinkler main pipe 120 to monitor the water pressure of the automatic sprinkler main pipe 120 to ensure that the automatic sprinkler fire extinguishing device 1' can work normally within the specified pressure range.

[0064] like Figure 2 As shown, the water pump control module 11 further includes a variable frequency control system 113 , which is electrically connected to the water pump 110 and the flow sensor 112 .

[0065] Specifically, the frequency conversion control system 113 includes a PLC control system 1130, a PID regulator 1131 and a frequency converter 1132. The flow sensor 112 is connected to the input end of the PLC control system 1130, the output end of the PLC control system 1130 is connected to the input end of the PID regulator 1131, the output of the PID regulator 1131 is connected to the water pump 110 through the frequency converter 1132, and the PLC control system 1130 is connected to the frequency converter 1132.

[0066] In this embodiment, the PLC control system 1130 uses Siemens S7-1200 series (S7-1214C). The PID regulator 1131 uses the PID_Compact function module built into the S7-1214C.

[0067] Specifically, under different water spraying intensities, when the sprinkler 122 starts to spray water, the flow sensor 112 converts the monitored actual flow Q into a voltage signal and imports it into the PID regulator 1131, compares the voltage signal with the voltage signal set by the PLC control system 1130, determines the flow range of the flow sensor 112, and selects different water pumps 110 according to different flow ranges. The parameters of the flow control water pump are obtained by the PID regulator 1131, applied to the frequency converter 1132, and the frequency conversion is performed by switching the circuit to adjust the water supply of the automatic fire extinguishing experimental device 1' in real time, so that the water supply network pressure of the automatic water spraying module 12 is maintained within a certain range. When the flow sensor 112 changes, the water pump 110 is controlled by the PLC control system 1130 to adjust the speed according to the actual flow Q, so that the constant pressure water supply of the terminal sprinkler 122 can be achieved.

[0068] The following is a method embodiment corresponding to the above-mentioned device embodiment. This embodiment can be implemented in conjunction with the above-mentioned embodiment. The relevant technical details mentioned in the above-mentioned embodiment are still valid in this embodiment. In order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied in the above-mentioned embodiment.

[0069] Please refer to Figure 3 , is a flow chart of an automatic fire extinguishing test method provided by another embodiment of the present invention, the automatic fire extinguishing test method is implemented by using the automatic fire extinguishing test device 1', and comprises the following steps:

[0070] S10: sprinkler arrangement step, sprinkler arrangement is performed using a hydraulically balanced pipe network structure;

[0071] S20: hydraulic calculation step, calculating hydraulic parameters under different water spraying intensities or different danger levels;

[0072] S30: Pump selection step, selecting a corresponding water pump 110 according to hydraulic parameters.

[0073] In step S10, the nozzles are arranged using a hydraulically balanced pipe network structure according to the effective area and the nozzle spacing, requiring that the distance from each nozzle 122 to the node 9 is the same, that is, the distance from each nozzle 122 to the water pump 110 is the same, and the equivalent length of the pipeline from each nozzle 122 to the water pump 110 is the same. The nozzle spacing refers to the distance between each two adjacent nozzles 122.

[0074] In step S20 , the hydraulic parameters include one or a combination of flow rate, working pressure, flow velocity, head loss and pipe diameter.

[0075] like Figure 4 As shown, in step S30, the following steps are also included:

[0076] S300: setting flow threshold intervals at different water spray intensities or different danger levels according to hydraulic parameters;

[0077] S301: Detecting actual flow and determining a flow threshold interval in which the actual flow is located;

[0078] S302: Select a corresponding water pump according to the flow threshold interval where the actual flow is located.

[0079] For ease of understanding, the following will take a specific application scenario as an example:

[0080] In step S10:

[0081] Assume that the experimental site is 12m×10m, the hazard level is medium hazard II, and the water spray intensity D=8L / (min·m 2 ), select the most unfavorable area A as the site area, that is, A = 120m 2 , the nozzle spacing is 3.3m.

[0082] According to the current national standards, the long side of the effective area is:

[0083] L min ≥1.2A 1 / 2

[0084] Where: L min ——Length of the long side of the automatic sprinkler action area, m;

[0085] A——automatic sprinkler action area, the action area of ​​different hazard levels specified in the current national standards or the converted area of ​​the maximum number of operating sprinklers, m;

[0086] Short side of effective area:

[0087] B≤A / L

[0088] Where: L is the length of the long side of the automatic sprinkler action area determined by calculation, m

[0089] B——length of the short side of the automatic sprinkler effective area, m.

[0090] L min ≥1.2×120 1 / 2 =13.15m

[0091] Calculate the number of nozzles 122 on the automatic sprinkler branch pipe 121: L / 3.3=13.15 / 3.3=3.98, take 4.

[0092] L = 3.3 × 4 = 13.2 m

[0093] B=120 / 13.2=9.09m

[0094] The number of water spray branches 121 is: B / 3.3 = 9.09 / 3.3 = 2.75 rows, 3 rows are taken. Then the number of nozzles 122 is: 4×3 = 12. The calculated effective area is: 4×3×3.32 = 130.68m 2 The protection area of ​​each nozzle 122 is: As = 3.3 × 3.3 = 10.89m 2 .

[0095] Specifically, the plan view of the nozzle arrangement is as follows: Figure 5 As shown. In the figure, DN25 means the pipe diameter is 25mm. The pipe diameter of the automatic sprinkler main pipe 120 before node 9 is 65mm, the pipe diameter between node 9 and node 4 and node 9 and node 8 is 50mm, the pipe diameter between node 4 and node 3 and node 8 and node 7 is 40mm, the pipe diameter between node 3 and node 2 and node 7 and node 6 of the sprinkler branch pipe 121 is 32mm, and the pipe diameter between the terminal node 2 and node 1 and node 6 and node 5 is 25mm. The selection of pipe diameter is symmetrical with node 4 and node 8 as the axis, so as to achieve balanced pipe network water supply.

[0096] In another embodiment, the plan view of the nozzle arrangement is Figure 5 The difference lies in the selection of pipe diameters. Specifically, in another embodiment, the pipe diameter of the automatic sprinkler main pipe 120 before node 9 is 125 mm, the pipe diameter between node 9 and node 4 and node 9 and node 8 is also 125 mm, and the pipe diameter between node 4 and node 1 and between node 8 and node 5 is 100 mm. The selection of pipe diameters is symmetrical with node 4 and node 8 as the axis, so that balanced pipe network water supply can also be achieved.

[0097] In step S20:

[0098] The flow rate of the first nozzle in nozzle 122 is:

[0099] q=DA S =8×3.3 2 =87.12L / min=1.452L / s

[0100] The first nozzle refers to the nozzle closest to the fire source when a fire occurs, that is, the first nozzle to be opened. The working pressure of the first nozzle is P s The calculation process is as follows:

[0101] q=k(10P s ) 1 / 2

[0102] P s =(q / k) 2 / 10=(87.12 / 80) 2 / 10 = 0.119 MP a

[0103] Take P s =0.12MPa

[0104] Where: q——nozzle outflow, L / S;

[0105] D——Water spray intensity, L / (min·m 2 );

[0106] P s ——Pressure at the nozzle, MPa;

[0107] k——Nozzle flow coefficient, determined according to the product, dimensionless.

[0108] The pipe diameter is determined by Table 1 below:

[0109] Table 1 Diameters of sprinkler branches and the number of sprinkler heads controlled by sprinkler branches in light and medium hazard areas

[0110]

[0111] The flow rate V is determined by the following formula:

[0112]

[0113] Where, V—pipeline flow velocity, m / s;

[0114] q xh —Pipeline flow, m 3 / s;

[0115] D j —Inner diameter of pipe, mm.

[0116] Head loss along the way:

[0117] h=i×L

[0118] Where, h is the head loss along the way, MPa;

[0119] i—head loss per meter of pipeline (hydraulic gradient), MPa / m;

[0120] L—pipeline length, m;

[0121]

[0122] Where, i is the head loss per meter of pipeline, 0.1 MPa / m;

[0123] q g —Water flow rate in the pipeline, L / min;

[0124] dj—calculated inner diameter of the pipe, mm;

[0125] C h —Pipe material coefficient, cast iron pipe; C h =100, steel pipe C h =120.

[0126] The selection of pipe fittings and valves can refer to Table 2 below, which shows the equivalent length table of galvanized steel pipe fittings and valves.

[0127] Table 2

[0128]

[0129] Short riser calculation:

[0130] k s =q / (10(P S +h S +Z S )) 1 / 2

[0131] Among them, ks—is the nozzle conversion flow coefficient;

[0132] q—is the outflow rate of the first nozzle in the effective area, L / min;

[0133] Ps—is the working pressure of the first nozzle in the effective area, MPa;

[0134] hs—head loss of short riser of sprinkler nozzle, MPa;

[0135] Zs—water pressure generated by the geometric height difference of the short vertical pipe of the nozzle, MPa; when the nozzle 122 is above the water spray branch pipe 121, Zs is a positive value, and when the nozzle 122 is below the water spray branch pipe 121, Zs is a negative value.

[0136] The calculation results of the short riser are shown in Table 3.

[0137] Table 3

[0138]

[0139] Pipe section calculation:

[0140] H=(1.2-1.4)∑(P p +P0+Zh c )

[0141] Where:

[0142] H—water pump head pressure (MPa);

[0143] ∑P p —The cumulative value of the head loss along the pipeline and in some places (MPa);

[0144] P0—pressure of the nozzle at the most unfavorable point (MPa);

[0145] Z—the elevation difference between the nozzle at the most unfavorable point and the lowest water level of the water tank 101 or the top of the water inlet pipe of the water supply pump 110;

[0146] h c —The pressure at the suction pipe of the water pump 110 is 0 when the water is sucked from the water tank 101; when the water is directly sucked from the external municipal water supply network, the value is the pressure value of the municipal network, MPa.

[0147] Table 4-1: Head loss of hydraulic balance pipe network structure of automatic fire extinguishing experimental device 1'.

[0148]

[0149] In Table 4-1, "1-2" indicates the pipe section between node 1 and node 2. From Table 4-1, it can be concluded that the pump head when there are 12 nozzles is:

[0150] H=0.33+(6 / 100-0.1 / 100+0.6 / 100)==0.33+0.053=0.383MPa=38.3mH2O

[0151] In the above formula, 0.053 is the most unfavorable elevation difference between the nozzle 122 and the top of the water supply pipe of the water pump 110. The nozzle 122 is 0.1m from the ceiling, and the water pump 110 is 0.6m high, a total of 0.7m, and the elevation difference is 6-0.7=5.3m=0.053cm. mH2O is a unit of pressure.

[0152] The following tables 4-2, 4-3, 4-4, 4-5, and 4-6 are the head losses when there are 1, 2, 3, 4, and 8 nozzles respectively.

[0153] Table 4-2: Head loss when one nozzle is used

[0154]

[0155] From Table 4-2, the pump head for one nozzle is:

[0156] H=0.157+0.053=0.21MPa=21mH2O Table 4-3: Water head loss with 2 nozzles

[0157]

[0158] From Table 4-3, the pump head when there are two nozzles is:

[0159] H=0.16+0.053=0.213MPa=21.3mH2OTable 4-4: Head loss when there are 3 nozzles

[0160]

[0161] From Table 4-4, we can get the pump head when there are 3 nozzles:

[0162] H=0.168+0.053=0.221MPa=22.1H2OTable 4-5: Head loss with 4 nozzles

[0163]

[0164]

[0165] From Table 4-5, the pump head for 4 nozzles is:

[0166] H=0.17+0.053=0.223MPa=22.3mH2O

[0167] Table 4-6: Head loss when there are 8 nozzles

[0168]

[0169] From Table 4-6, the pump head when there are 8 nozzles is:

[0170] H=0.237+0.053=0.29MPa=29mH2O

[0171] In step S30:

[0172] In the case of small water replenishment, the capacity of water tank 101 is selected as 72m 3 .

[0173] The calculation and selection of the water pump 110 under different water spraying intensities are shown in Table 5 below. The water pump 110 includes a first water pump 1100, for example, a ZS65-40-125 / 3.0 type, a second water pump 1101, for example, a ZS65-50-160 / 5.5 type, and a third water pump 1102, for example, a ZS80-65-160 / 15.0 type. The three water pumps are variable frequency horizontal centrifugal pumps. The relationship between the output flow and the head of each water pump under different speeds or different water spraying intensities is shown in Table 5. Figures 6A to 6E As shown, where: Fig. 6A This is the relationship between the output flow and head of the ZS80-65-160 / 15.0 water pump at different speeds. Fig. 6A In the figure, the curves from top to bottom respectively represent the relationship between the output flow and the head when the speed of the ZS80-65-160 / 15.0 water pump is 2950r / min, 2890r / min, 2830r / min, 2655r / min, 2550r / min, 2480r / min, 2460r / min and 2400r / min; Figure 6B This is the relationship between the output flow and head of the ZS65-50-160 / 5.5 pump at different speeds. Figure 6B The curves from top to bottom respectively represent the relationship between the output flow and head of the ZS65-50-160 / 5.5 water pump at speeds of 2900r / min, 2870r / min, 2780r / min, 2700r / min, 2655r / min and 2630r / min; Figure 6C , Fig.6D as well as Fig. 6E For ZS65-40-125 / 3.0 water pump, the water spray intensity is 8L / (min·m 2 )、5.6L / (min·m 2 ) and 4L / (min·m 2 ) under different speeds, the relationship between output flow and head, Figure 6C The curves from top to bottom represent the water spray intensity of ZS65-40-125 / 3.0 pump at 8L / (min·m 2 ) When the speed is 2890r / min, 2770r / min, 2720r / min, 2650r / min and 2630r / min, the relationship between the output flow rate and the head is, Fig.6D The curves from top to bottom represent the water spray intensity of ZS65-40-125 / 3.0 pump at 5.6L / (min·m 2 ) when the speed is 2900r / min, 2850r / min, 2780r / min, 2700r / min, 2610r / min, 2570r / min and 2530r / min, Fig. 6E The curves from top to bottom represent the water spray intensity of ZS65-40-125 / 3.0 pump at 4L / (min·m 2 ) is the relationship between output flow and head at speeds of 2890r / min, 2800r / min, 2700r / min, 2670r / min, 2630r / min, 2580r / min, 2550r / min, 2520r / min, 2500r / min and 2480r / min.

[0174] Table 5: Selection table of different water pumps under different water spray intensities

[0175]

[0176] It can be seen from Table 5 that when the water spray intensity is 8L / (min·m 2 ), the calculated set flow threshold range is 0-26.14m 3 / h, 26.14-36.6m 3 / h and 36.6-62.17m 3 / h; when the water spray intensity is 5.6L / (min·m 2 ), the calculated set flow threshold range is 0-25.62m 3 / h, 25.62-36.6m 3 / h and 36.6-43.91m 3 / h; when the water spraying intensity is 4L / (min·m 2 ), the calculated set flow threshold range is 0-28.76m 3 / h and 28.76-31.36m 3 / h.

[0177] (1) The water spray intensity is 8L / (min·m 2 ) under the working conditions:

[0178] like Fig. 7A The water spray intensity is shown as 8L / (min·m 2 ), the control flow chart of the automatic sprinkler fire extinguishing test method, when the sprinkler 122 is in action, the actual flow Q detected by the flow sensor 112 is converted into a voltage signal of 0-10v and introduced into the PID regulator 1131, the voltage signal is compared with the voltage signal set by the PLC control system 1130, and the flow threshold interval of the actual flow Q of the flow sensor 112 is determined. If the actual flow Q is between 0-26.14m 3 / h, select the first water pump 1100 (i.e. pump No. 1). If it is between 26.14-36.6m 3 / h, select the second water pump 1101 (i.e. pump No. 2). If the 3 / h, the third water pump 1102 (i.e., pump No. 3) is selected. The parameters of the flow control water pump are obtained through the PID regulator 1131, applied to the frequency converter 1132, and the frequency conversion is performed through the switching circuit to adjust the water supply of the automatic sprinkler fire extinguishing experimental device 1' in real time, so that the pressure of the water supply network (i.e., the hydraulic balance network structure) of the automatic sprinkler module 12 is maintained within a certain range. When the flow sensor 112 changes, the working pump is controlled by the PLC control system 1130 according to the actual flow Q and the speed of the water pump 110 is adjusted, so that the constant pressure water supply at the end (i.e., the sprinkler 122) can be achieved.

[0179] When using pump No. 1, the actual flow rate Q range is 0<Q≤5.22m 3 / h, frequency conversion 45.33HZ; 5.22m 3 / h<Q≤10.44m 3 / h, frequency conversion 45.67HZ; 10.44m 3 / h<Q≤15.69m 3 / h, frequency conversion 46.88HZ; 15.69m 3 / h<Q≤20.90m 3 / h, frequency conversion 47.74HZ; 20.90m 3 / h<Q≤26.14m 3 / h, frequency conversion 49.81HZ.

[0180] When using pump No. 2, the actual flow rate Q interval is 26.14m 3 / h<Q≤31.36m 3 / h, frequency conversion 46.53HZ; 31.36m 3 / h<Q≤36.6m 3 / h, frequency conversion 49.46HZ.

[0181] When using pump No. 3, the actual flow rate Q interval is 36.60m 3 / h<Q≤41.83m 3 / h, frequency conversion 42.16HZ; 41.83m 3 / h<Q≤46.98m 3 / h, frequency conversion 43.00HZ; 46.98m 3 / h<Q≤52.20m 3 / h, frequency conversion 45.14HZ; 52.20m 3 / h<Q≤57.42m 3 / h, frequency conversion 48.11HZ; 57.42m 3 / h<Q≤62.71m3 / h, frequency conversion 49.30HZ;

[0182] This cycle continues until the fire is under control or the cycle is stopped manually.

[0183] (2) The water spray intensity is 5.6L / (min·m 2 ) under the working conditions:

[0184] like Figure 7B The water spray intensity is 5.6L / (min·m 2 ), the control flow chart of the automatic sprinkler fire extinguishing test method, when the sprinkler 122 is in action, the actual flow rate monitored by the flow sensor 112 is converted into a voltage signal of 0-10v and introduced into the PID regulator 1131, the voltage signal is compared with the flow signal set by the PLC control system 1130, and the flow threshold interval of the actual flow rate Q of the flow sensor 112 is determined. If the actual flow rate Q is between 0-25.62m 3 / h, select the first water pump 1100 (i.e. pump No. 1). If it is between 25.62-36.6m 3 / h, select the second water pump 1101 (i.e. pump No. 2). If the flow rate is between 36.6-43.91m 3 / h, the third water pump 1102 (i.e., pump No. 3) is selected. The parameters are obtained through the PID regulator 1131, applied to the frequency converter 1132, and the frequency conversion is performed through the switching circuit to adjust the water supply of the automatic sprinkler fire extinguishing experimental device 1' in real time, so that the pressure of the water supply network (i.e., the hydraulic balance network structure) of the automatic sprinkler module 12 is maintained within a certain range. When the flow sensor 112 changes, the working pump is controlled by the PLC control system 1130 and the speed of the water pump 110 is adjusted according to the actual flow Q, so that constant pressure water supply can be achieved at the end (i.e., the sprinkler 122).

[0185] When using pump No. 1, the actual flow rate Q interval is 0<Q≤3.66m 3 / h, frequency conversion 43.60HZ; 3.66m 3 / h<Q≤7.32m 3 / h, frequency conversion 43.60HZ; 7.32m 3 / h<Q≤10.98m 3 / h, frequency conversion 44.29HZ; 10.98m 3 / h<Q≤14.64m 3 / h, frequency conversion 45.98HZ; 14.64m 3 / h<Q≤18.30m 3 / h, frequency conversion 46.53HZ; 18.30m 3 / h<Q≤21.89m 3 / h, frequency conversion 47.91HZ; 21.89m 3 / h<Q≤25.62m 3 / h, frequency conversion 49.12HZ.

[0186] When using pump No. 2, the actual flow rate Q interval is 25.62m 3 / h<Q≤29.27m 3 / h, frequency conversion 45.33HZ; 29.27m 3 / h<Q≤32.94m 3 / h, frequency conversion 45.75HZ; 32.91m 3 / h<Q≤36.60m 3 / h, frequency conversion 47.91HZ.

[0187] When using pump No. 3, the actual flow rate Q interval is 36.60m 3 / h<Q≤40.26m 3 / h, frequency conversion 41.36HZ; 40.26m 3 / h<Q≤43.91m 3 / h, frequency conversion 42.39HZ.

[0188] This cycle continues until the fire is under control or the cycle is stopped manually.

[0189] (3) When the water spray intensity is 4L / (min·m 2 ) under the working conditions:

[0190] like Figure 7C The water spray intensity is 4L / (min·m 2 ), the control flow chart of the automatic sprinkler fire extinguishing test method, when the sprinkler 122 is in action, the actual flow rate monitored by the flow sensor 112 is converted into a voltage signal of 0-10v and introduced into the PID regulator 1131, and the voltage signal is compared with the voltage signal set by the PLC control system 1130 to determine the flow threshold interval where the actual flow rate Q of the flow sensor 112 is located. If the actual flow rate Q is between 0-28.76m 3 / h, select the first water pump 1100 (i.e. pump No. 1). If it is between 28.76-31.36m 3 / h, the second water pump 1101 (i.e., pump No. 2) is selected. The parameters of the flow control water pump are obtained through the PID regulator 1131, applied to the frequency converter 1132, and the frequency conversion is performed through the switching circuit to adjust the water supply of the automatic sprinkler fire extinguishing experimental device 1' in real time, so that the pressure of the water supply network (i.e., the hydraulic balance network structure) of the automatic sprinkler module 12 is maintained within a certain range. When the flow sensor 112 changes, the working pump is controlled by the PLC control system 1130 according to the actual flow Q and the speed of the water pump 110 is adjusted, so that the constant pressure water supply at the end (i.e., the sprinkler 122) can be achieved.

[0191] When using pump No. 1, the actual flow rate Q interval is 0<Q≤2.61m 3 / h, frequency conversion 42.74HZ; 2.61m 3 / h<Q≤5.22m 3 / h, frequency conversion 42.74HZ; 5.22m 3 / h<Q≤7.83m 3 / h, frequency conversion 43.10HZ; 7.83m 3 / h<Q≤10.44m 3 / h, frequency conversion 43.43HZ; 10.44m 3 / h<Q≤13.05m 3 / h, frequency conversion 43.97HZ; 13.05m 3 / h<Q≤15.66m 3 / h, frequency conversion 44.48HZ; 15.66m 3 / h<Q≤18.27m 3 / h, frequency conversion 45.33HZ; 28.27m 3 / h<Q≤20.88m 3 / h, frequency conversion 46.01HZ; 20.88m 3 / h<Q≤23.49m 3 / h, frequency conversion 46.53HZ; 23.49m 3 / h<Q≤26.14m 3 / h, frequency conversion 48.25HZ; 26.14m 3 / h<Q≤28.76m 3 / h, frequency conversion 49.81HZ.

[0192] When using pump No. 2, the actual flow rate Q interval is 28.76m 3 / h<Q≤31.36m 3 / h, frequency conversion 45.33HZ;

[0193] This cycle continues until the fire is under control or the cycle is stopped manually.

[0194] The above embodiment provides an example of a medium-risk II location, but is not limited thereto. Fire extinguishing experiments can also be performed in other working conditions of different hazard levels in the same manner as the above embodiment.

[0195] In summary, the present invention adopts an automatic water spray module with a hydraulically balanced pipe network structure to improve the water supply reliability of the automatic water spray fire extinguishing experimental device 1'; on the other hand, the variable frequency control system 113 is designed to realize the fire extinguishing experiment of the same device under different water spraying intensities or different danger levels. This invention is supported by the National Key R&D Program Project (2022YFC3002304).

[0196] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which belong to the protection scope of the present invention.

Claims

1. An automatic water sprinkler fire extinguishing experimental device, comprising a water supply module, a water pump control module and an automatic water sprinkler module connected in sequence, characterized in that: The water supply module includes a water tank, which supplies experimental water in real time; The water pump control module comprises a water pump, the water inlet end of the water pump is connected to the water tank, and the number of the water pumps is multiple; The automatic water sprinkler module is connected to the water outlet of the water pump. The automatic water sprinkler module is a hydraulically balanced pipe network structure, including an automatic water sprinkler main pipe, multiple water sprinkler branches and multiple nozzles connected in sequence. The automatic water sprinkler main pipe has a first node, and the distances from the multiple nozzles to the first node are the same.

2. The automatic sprinkler fire extinguishing test device according to claim 1 is characterized in that: The equivalent lengths of the pipelines from the multiple nozzles to the water pump are the same.

3. The automatic sprinkler fire extinguishing test device according to claim 1, characterized in that: The distance between each two adjacent nozzles is the same.

4. The automatic sprinkler fire extinguishing test device according to claim 1, characterized in that: The water pump control module also includes a flow sensor, which is arranged on the automatic sprinkler main pipe.

5. The automatic sprinkler fire extinguishing test device according to claim 4, characterized in that: The water pump control module also includes a frequency conversion control system electrically connected to the water pump and the flow sensor.

6. The automatic sprinkler fire extinguishing test device according to claim 5, characterized in that: The frequency conversion control system includes a PLC control system, a PID regulator and a frequency converter, the flow sensor is connected to the input end of the PLC control system, the output end of the PLC control system is connected to the input end of the PID regulator, the output end of the PID regulator is connected to the water pump through the frequency converter, and the PLC control system is connected to the frequency converter.

7. The automatic sprinkler fire extinguishing test device according to claim 1, characterized in that: The water pumps include a first water pump, a second water pump and a third water pump.

8. An automatic sprinkler fire extinguishing test method, characterized in that: The automatic sprinkler fire extinguishing experimental device according to any one of claims 1 to 7 comprises the following steps: A sprinkler arrangement step, using the hydraulic balancing pipe network structure to arrange sprinklers; Hydraulic calculation steps, calculate hydraulic parameters under different water spray intensities or different hazard levels; The pump selection step is to select the corresponding water pump according to the hydraulic parameters.

9. The automatic sprinkler fire extinguishing test method according to claim 8, characterized in that: The hydraulic parameters include one or a combination of flow rate, working pressure, pipe diameter, flow rate, head loss and water pump head.

10. The automatic sprinkler fire extinguishing test method according to claim 8 or 9, characterized in that: The pump selection step also includes the following steps: Set flow threshold intervals at different water spray intensities or different danger levels according to hydraulic parameters; Detecting actual flow, and determining the flow threshold interval within which the actual flow is located; The corresponding water pump is selected according to the flow threshold interval where the actual flow is located.

11. The automatic sprinkler fire extinguishing test method according to claim 10, characterized in that: The water spray intensity is 8L / (min·m 2 )、5.6L / (min·m 2 )、4L / (min·m 2 ), the flow threshold ranges are: 0~62.17m 3 / h, 0~43.91m 3 / h, 0~31.36m 3 / h; The first water pump, the second water pump or the third water pump corresponding to the actual flow rate is selected, and the frequency is adjusted according to the corresponding actual flow rate.

12. A computer-readable storage medium, characterized in that: The storage medium carries one or more computer programs, and when the one or more computer programs are executed by an electronic device, the electronic device can implement the steps of the automatic sprinkler fire extinguishing test method as described in any one of claims 8 to 11.

13. A computer program product, characterized in that It comprises computer-readable instructions, and when the computer-readable instructions are executed on an electronic device, the electronic device implements the steps of the automatic sprinkler fire extinguishing test method as claimed in any one of claims 8 to 11.

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