Nozzle gas impulsive force performance testing device in local application fire extinguishing system

Abstract

The invention discloses a nozzle gas impulsive force performance testing device in a local application fire extinguishing system, which comprises a first composite base, a second composite base and an auxiliary bracket, the auxiliary bracket is positioned between the first composite base and the second composite base, and a fire extinguishing agent bottle group is mounted in the first composite base. A local application nozzle is installed on one side of the top of the auxiliary support, and a top end opening of the local application nozzle is connected with the output end of the fire extinguishing agent bottle set through a fire extinguishing agent conveying pipe fitting. According to the invention, the test platform is arranged below the local application nozzle, and the test platform is provided with a plurality of pressure measuring points consisting of transition pipe fittings and pressure measuring parts, so that a pressure measuring array is formed, the gas impulsive force and the effective fire extinguishing area can be calculated according to the measured pressure distribution, and by comparing the gas impulsive force with the flame lifting force, the effective fire extinguishing area can be calculated. As long as the gas impulsive force is greater than the flame lift force, the local fire extinguishing system can suppress flames and realize effective fire extinguishing.

Description

Technical Field

[0002] The present invention relates to the technical field of local application fire extinguishing system testing devices, and specifically to a testing device for the gas impact performance of nozzles in local application fire extinguishing systems. Background Art

[0003] In the field of fire protection, the requirements for local application fire extinguishing are different from those for total flooding fire extinguishing. Total flooding requires rapid vaporization and uniform distribution on the basis of rapid spraying in a closed space. However, local application is different. Local application creates a high concentration of fire extinguishing agent in a limited space for a short time (due to the limited high-pressure time of the nozzle and the limited amount of fire extinguishing agent, generally not exceeding 5 s). However, because the pure gas fire extinguishing agent dissipates extremely quickly in an open space, it is impossible to effectively create a local high concentration. Therefore, the local fire extinguishing process actually consists of two stages.

[0004] The first stage is the fire suppression stage: relying on the initial high pressure of the nozzle, a relatively high impact force of the sprayed fire extinguishing agent is used to suppress the flame. At the same time, the temperature in the space between the nozzle and the fire source is reduced, the vaporization rate of the high-boiling-point gas fire extinguishing agent is reduced, and as many droplets, that is, liquid fire extinguishing agent, as possible are sprayed onto the surface of the heat source.

[0005] The second stage is the fire extinguishing stage: inside the conical cover formed by the fire extinguishing agent droplets, the droplets themselves vaporize, creating a local high concentration inside the cone. At the same time, the liquid fire extinguishing agent sprayed onto the surface of the heat source quickly vaporizes due to heat, and the vaporization rate is greater than the dissipation rate. The difference between the two rates can create a local high concentration to achieve fire extinguishing.

[0006] Therefore, testing the gas impact force of the fire extinguishing system in the first stage is an important indicator for detecting the fire extinguishing ability of the fire extinguishing system. Currently, the impact force of the fire extinguishing system nozzle is divided into two aspects, one is the impact force of the droplets, and the other is the impact force of the gas. However, the current existing method for measuring the impact force is to place an electronic scale directly below the nozzle. At this time, the measured impact force is the resultant force of the liquid and gas impact forces. However, the impact force of the droplets is the impact force of liquid particles, which has little impact on the flame. The main impact force is still the gas impact force, and the gas impact force is mainly generated by the airflow induced by the high-speed downward movement of the droplets. Therefore, the two affect each other, and using a single measurement method cannot obtain accurate detection data. Therefore, in view of the problems existing in the prior art, the present application will provide a testing device for the gas impact performance of nozzles in local application fire extinguishing systems to solve this problem. Summary of the Invention

[0007] The present invention provides a testing device for the gas impact performance of nozzles in local application fire extinguishing systems, which solves the problems raised in the background art.

[0008] The present invention provides the following technical solution: a nozzle gas impulse performance test device in a local application system, comprising a first composite base, a second composite base, and an auxiliary bracket, wherein the auxiliary bracket is located between the first composite base and the second composite base, a fire extinguishing agent bottle group is installed in the first composite base, a local application nozzle is installed on one side of the top of the auxiliary bracket, and a fire extinguishing agent delivery pipe is installed between the top port of the local application nozzle and the fire extinguishing agent bottle group;

[0009] A test platform aligned with the local application nozzle is installed on the top of the second composite base. The test platform consists of an annular plate and eight support plates arranged along the circumference of the annular plate. Several transition pipes are installed in the annular plate and the eight support plates, and a pressure measuring component is installed at the bottom of the transition pipe.

[0010] Preferably, the transition pipe fitting includes a transition pipe body and a limiting screw sleeve, the middle portion of the transition pipe body is clamped in the corresponding annular plate or the corresponding support plate, and the surface of the top end of the transition pipe body is provided with an external thread, and the limiting screw sleeve is threadedly connected to the surface of the top end of the transition pipe body and can be fitted and connected with the top surface of the corresponding annular plate or the top surface of the corresponding support plate.

[0011] Preferably, the pressure measuring component includes a micro-differential pressure transmitter body, and the top of the micro-differential pressure transmitter body is respectively provided with a first connecting end and a second connecting end, one end of the first connecting end is fixedly sleeved with one end of the corresponding bottom of the transition pipe body, and the port of the second connecting end is in an open state.

[0012] Preferably, an auxiliary push rod is installed on the top of the micro-differential pressure transmitter body, and the auxiliary push rod can be fitted and connected with the corresponding bottom surface of the annular plate or the corresponding bottom surface of the support plate after the corresponding transition pipe body and the limiting screw sleeve are spirally locked. The combined use of the auxiliary push rod and the limiting screw sleeve can further ensure the installation strength of the transition pipe in the test platform. The micro-differential pressure transmitter body is electrically connected to the data acquisition equipment through a wire.

[0013] Preferably, the data acquisition device includes a cabinet and a data acquisition device installed in the cabinet, and a side wall of one side of the cabinet is provided with a plurality of clearance grooves for installing wires to avoid installation interference.

[0014] Preferably, the ends of the eight support plates away from the annular plate are commonly connected to form an annular platform, and an auxiliary baffle is installed between two adjacent support plates. A transition pipe fitting is sleeved inside the annular platform. Four transition pipe fittings are equidistantly arranged and installed inside the eight support plates. Sixteen transition pipe fittings are equidistantly arranged along the circumferential direction of the annular plate. The number of pressure measurement components is the same as the number of transition pipe fittings and they are numbered in sequence, thereby meeting the use requirement of setting pressure measurement points at different radii to form a pressure measurement array for obtaining pressure data at different positions.

[0015] Preferably, the second composite base includes a base body, an electric cylinder, and a movable plate. The electric cylinder is installed in the middle of the base body, and the output end of the electric cylinder is in transmission connection with the middle of the movable plate. A transmission shaft for driving the annular plate is sleeved in the outer ring structure of the movable plate. The second composite base can provide the use condition of automatic lifting for the test platform and the related structures inside the test platform, thereby meeting different use requirements.

[0016] Preferably, a limiting sleeve installed on the top of the base body is clamped at the end of the transmission shaft away from the annular plate. By reciprocally clamping the transmission shaft and the limiting sleeve, the stability of the reciprocating lifting of the transmission shaft and the related structures of the transmission shaft is improved. A through groove is opened in the outer ring structure of the base body, and one side of the base body is fixedly connected to one side of the bottom of the auxiliary support, ensuring the stability of the combined use of the second composite base and the auxiliary support.

[0017] Preferably, a plurality of fire extinguishing agent bottle groups are sleeved inside the first composite base. Each fire extinguishing agent bottle group includes a fire extinguishing agent storage container and a container valve assembly. Assembly components are provided between the middle of each fire extinguishing agent storage container and the rear structure of the first composite base. One end of the fire extinguishing agent delivery pipe fitting is connected to the top port of the local application nozzle, and the other end of the fire extinguishing agent delivery pipe fitting is fixedly connected to the fire extinguishing agent storage container through the container valve assembly. A starting gas bottle group is arranged on one side of the fire extinguishing agent bottle group. A solenoid valve is arranged on the top of the starting gas bottle group. A connecting pipe is installed between the top port of the starting gas bottle group and the container valve assembly. After the solenoid valve of the starting gas bottle group is opened, the medium inside the starting gas bottle group can open the container valve assembly through the connecting pipe to start the fire extinguishing agent bottle group, and the fire extinguishing agent in the fire extinguishing agent storage container is transported to the local application nozzle through the fire extinguishing agent delivery pipe fitting for spraying;

[0018] The assembled component includes a U-shaped frame plate. Two opposite relief grooves capable of being respectively clamped with both sides of the U-shaped frame plate are provided in the rear-end structure of the first composite base. The front end of the U-shaped frame plate is sleeved on the outer side of the middle part of the corresponding fire extinguishing agent storage container. A long threaded rod is connected to the rear end of the U-shaped frame plate. A limit nut capable of being closely connected to the rear-end surface of the first composite base is threadedly connected to one end of the long threaded rod. The provided assembled component can ensure the stable assembly of the fire extinguishing agent bottle group and the first composite base, and the assembled component itself can have the use effect of reciprocating disassembly or installation.

[0019] The test method of this device includes: S1. Pressure measurement points are set at different radii to form a pressure measurement array to obtain pressure data at different positions.

[0020] S2. By multiplying the pressure value P collected at each pressure measurement point by the pressure collection area of each pressure measurement point, the gas impulse force of each pressure measurement point can be obtained. Add the gas impulse force values of each pressure measurement point and compare them with the flame lift force value. As long as the sum of the gas impulse force values is greater than the flame lift force value, it can be proved that the local application fire extinguishing system can suppress the flame and achieve effective fire extinguishing.

[0021] S3. The calculation formula is F = PS, where F is the gas impulse force, unit: N; P is the pressure, unit: Pa (N / m 2 ); S is the pressure collection area, unit: m 2 , and all the pressure measurement points are the area center points.

[0022] S4. The calculation method of the pressure collection area S: Determine a central pressure measurement point, marked as A. The two adjacent pressure measurement points before and after the central pressure measurement point are respectively marked as B and C.

[0023] Taking half of the distance from B and C to A as the benchmark, two auxiliary punctuation marks are respectively marked, and the two auxiliary punctuation marks are respectively named D and E. Then, taking the center of the annular plate as the benchmark, the arc lines corresponding to D and E are respectively drawn. Then, extending 22.5-degree angles in the left and right directions at the positions where D and E are located with A as the center, two D1s and two E1s are formed. Then, connecting the two D1s and the two E1s can obtain the pressure collection area S.

[0024] The present invention has the following beneficial effects:

[0025] 1. By arranging a test platform below the local application nozzle and arranging a plurality of pressure measurement points composed of transition pipe fittings and pressure measurement components on the test platform to form a pressure measurement array, according to the measured pressure distribution, the gas impulse force and the effective fire extinguishing area can be calculated. By comparing the gas impulse force with the flame lift force, as long as the gas impulse force is greater than the flame lift force, it can be proved that this local application fire extinguishing system can suppress the flame and achieve effective fire extinguishing.

[0026] 2. Through the second composite base provided by the present invention, the test platform and multiple pressure measurement points provided on the test platform can automatically adjust their positions according to different height requirements to meet the gas impact force tests of different local application systems, with a wide range of applications.

[0027] 3. The pressure measurement points formed by the transition pipe fittings and pressure measurement components provided by the present invention, where the transition pipe fittings and the test platform have a detachable use effect and are simple and easy to operate.

[0028] 4. The pressure measurement component provided by the present invention collects the pressure of the pressure measurement points, and uses the data acquisition device associated with the pressure measurement component to collect the pressure data. Since a large number of pressures are collected, multiple pressure measurement components will be numbered in sequence and correspond one by one to the numbers set inside the data acquisition device, which can help the operator quickly find the pressure value of the corresponding point later, greatly improving the speed of reading data. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a three-dimensional schematic diagram of the structure of the present invention;

[0030] Figure 2 is a front view schematic diagram of the structure of the present invention;

[0031] Figure 3 is a top view schematic diagram of the test platform of the structure of the present invention;

[0032] Figure 4 is an enlarged schematic diagram of the pressure measurement component of the structure of the present invention;

[0033] Figure 5 is a top view schematic diagram of the first composite base of the structure of the present invention;

[0034] Figure 6 is a rear view schematic diagram of the first composite base of the structure of the present invention;

[0035] Figure 7 is a top view schematic diagram of the auxiliary baffle of the structure of the present invention;

[0036] Figure 8 is a bottom view schematic diagram of the auxiliary baffle of the structure of the present invention;

[0037] Figure 9 is a schematic diagram of the principle of the test method of the present invention;

[0038] Figure 10 is a cross-sectional view schematic diagram of the local application nozzle of the structure of the present invention.

[0039] In the figure: 1. First composite base; 2. Second composite base; 21. Base body; 22. Electric cylinder; 23. Movable plate; 24. Limit sleeve; 25. Transmission shaft; 3. Auxiliary support; 4. Fire extinguishing agent bottle group; 41. Fire extinguishing agent storage container; 42. Container valve assembly; 5. Local application nozzle; 6. Fire extinguishing agent conveying pipe fitting; 7. Test platform; 8. Transition pipe fitting; 81. Transition pipe body; 82. Limit locknut; 9. Pressure measuring component; 91. Differential pressure transmitter body; 92. First connection end; 93. Second connection end; 94. Auxiliary ejector rod; 10. Data acquisition device; 11. Auxiliary baffle; 12. Assembly component; 121. U-shaped frame plate; 122. Long threaded rod; 123. Limit nut; 13. Starting gas bottle group. Detailed implementation mode

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] Please refer to Figure 1-4 , Figure 7-8 , a test device for the gas impact performance of a nozzle in a local application fire extinguishing system, including a first composite base 1, a second composite base 2, and an auxiliary support 3. The auxiliary support 3 is located between the first composite base 1 and the second composite base 2. A fire extinguishing agent bottle group 4 is installed in the first composite base 1. One side of the top of the auxiliary support 3 is provided with a local application nozzle 5, and a fire extinguishing agent conveying pipe fitting 6 is installed between the top port of the local application nozzle 5 and the fire extinguishing agent bottle group 4;

[0042] A test platform 7 aligned with the local application nozzle 5 is installed on the top of the second composite base 2. The test platform 7 is composed of an annular plate and eight support plates arranged along the circumferential direction of the inner edge of the annular plate. A plurality of transition pipe fittings 8 are sleeved inside the annular plate and inside the eight support plates, and a pressure measuring component 9 is installed at the bottom of the transition pipe fitting 8;

[0043] The transition pipe fitting 8 includes a transition pipe body 81 and a limit screw sleeve 82. The middle part of the transition pipe body 81 is clamped in the corresponding annular plate or the corresponding support plate. And an external thread is provided on the surface of one end at the top of the transition pipe body 81. The limit screw sleeve 82 is threadedly connected to the surface of one end at the top of the transition pipe body 81 and can be in fitting connection with the top surface of the corresponding annular plate or the top surface of the corresponding support plate. The pressure measurement component 9 includes a differential pressure transmitter body 91. A first connection end 92 and a second connection end 93 are respectively arranged at the top of the differential pressure transmitter body 91. One end of the first connection end 92 is fixedly sleeved with one end at the bottom of the corresponding transition pipe body 81. And the port of the second connection end 93 is in an open state. An auxiliary ejector rod 94 is installed at the top of the differential pressure transmitter body 91. And after the corresponding transition pipe body 81 and the limit screw sleeve 82 are screwed together, the auxiliary ejector rod 94 can be in fitting connection with the bottom surface of the corresponding annular plate or the bottom surface of the corresponding support plate. The combined use of the auxiliary ejector rod 94 and the limit screw sleeve 82 can further ensure the installation strength of the transition pipe fitting 8 in the test platform 7. The differential pressure transmitter body 91 is electrically connected to a data acquisition device 10 through a wire. The data acquisition device 10 includes a cabinet and a data collector sleeved inside the cabinet. And a plurality of relief grooves for installing wires are provided on one side wall of the cabinet to avoid installation interference;

[0044] One ends of the eight support plates far away from the annular plate are jointly connected to form an annular platform. And an auxiliary baffle 11 is installed between two adjacent support plates. One transition pipe fitting 8 is sleeved inside the annular platform. Four transition pipe fittings 8 are equidistantly arranged and installed inside the eight support plates. Sixteen transition pipe fittings 8 are circumferentially equidistantly arranged and installed inside the annular plate. The set number of the pressure measurement components 9 is the same as the set number of the transition pipe fittings 8 and they are sequentially numbered. Thus, it meets the use requirement of setting pressure measurement points at different radii to form a pressure measurement array so as to obtain pressure data at different positions.

[0045] In the specific implementation process of this embodiment:

[0046] For obtaining the pressure values P of multiple pressure measurement points formed by sequentially combining multiple transition pipe fittings 8 and multiple pressure measurement components 9 on the test platform 7, the fire extinguishing agent bottle group 4 can be opened to enable the fire extinguishing agent in the fire extinguishing agent bottle group 4 to be conveyed to the local application nozzle 5 through the fire extinguishing agent conveying pipe fitting 6. Then, it is sprayed from the local application nozzle 5 to the transition pipe fitting 8 among multiple pressure measurement points. Then, the pressure measurement components 9 respectively corresponding to the multiple transition pipe fittings 8 are linked to perform pressure data detection and acquisition. And the multiple pressure data detections will be centrally collected and further processed by the data acquisition device 10 jointly associated with the multiple pressure measurement components 9 so that the existing background equipment can obtain information. And each pressure measurement component 9 has its own corresponding number. During the subsequent detection process, the user can quickly find the pressure value of the corresponding point through the number;

[0047] When a certain transition pipe fitting 8 or a certain pressure measuring component 9 fails, the limit sleeve 82 can be directly rotated until the limit sleeve 82 is separated from the corresponding transition pipe body 81, and then the assembly formed by the transition pipe body 81 and the corresponding pressure measuring component 9 can be withdrawn from the inside of the test platform 7;

[0048] Subsequently, the assembly of the new transition pipe body 81 and the pressure measuring component 9 is sleeved and reset on the test platform 7, and the limit sleeve 82 is helically locked with the transition pipe body 81. Moreover, the helical locking of the limit sleeve 82 can cooperate with the auxiliary ejector rod 94 to form a clamping effect on the test platform 7, ensuring the stable use of the assembly of the transition pipe body 81 and the pressure measuring component 9.

[0049] Please refer to Figure 1-2 , the second composite base 2 includes a base body 21, an electric cylinder 22, and a movable plate 23. The electric cylinder 22 is installed in the middle of the base body 21, and the output end of the electric cylinder 22 is drivingly connected to the middle of the movable plate 23. A transmission shaft 25 for drivingly connecting to the annular plate is sleeved in the outer ring structure of the movable plate 23. The second composite base 2 can provide the condition for the automatic lifting of the test platform 7 and the related structures inside the test platform 7, thereby meeting different usage requirements;

[0050] A limit sleeve 24 installed on the top of the base body 21 is clamped at one end of the transmission shaft 25 away from the annular plate. By reciprocally clamping the transmission shaft 25 and the limit sleeve 24, the stability of the reciprocating lifting of the transmission shaft 25 and the related structures of the transmission shaft 25 is improved. A through groove is opened in the outer ring structure of the base body 21, and one side of the base body 21 is fixedly connected to one side of the bottom of the auxiliary bracket 3 to ensure the stable combination use of the second composite base 2 and the auxiliary bracket 3;

[0051] In the specific implementation process of this embodiment:

[0052] For the lifting usage requirements of the test platform 7 and the related structures of the test platform 7, the movable plate 23 can be started, and the output end of the movable plate 23 drives the movable plate 23 and the transmission shaft 25 to perform automatic lifting operations on the test platform 7 and the test platform 7, thereby meeting different detection requirements in reality;

[0053] During the lifting process of the test platform 7 and the related structures of the test platform 7, the clamping of the transmission shaft 25 and the limit sleeve 24 can fully ensure the stability and reliability of the lifting of the test platform 7 and the related structures of the test platform 7.

[0054] Please refer to Figure 5-6, several fire extinguishing agent bottle groups 4 are sleeved inside the first composite base 1. The fire extinguishing agent bottle group 4 includes a fire extinguishing agent storage container 41 and a container valve assembly 42. Assembly components 12 are provided between the middle of the fire extinguishing agent storage container 41 and the rear structure of the first composite base 1. One end of the fire extinguishing agent delivery pipe fitting 6 is connected to the top port of the local application nozzle 5, and the other end of the fire extinguishing agent delivery pipe fitting 6 is fixedly connected to the fire extinguishing agent storage container 41 through the container valve assembly 42. A starting gas bottle group 13 is arranged on one side of the fire extinguishing agent bottle group 4. A solenoid valve is arranged on the top of the starting gas bottle group 13. A connecting pipe is installed between the top port of the starting gas bottle group 13 and the container valve assembly 42. After the solenoid valve of the starting gas bottle group 13 is opened, the medium inside the starting gas bottle group 13 can open the container valve assembly 42 through the connecting pipe to start the fire extinguishing agent bottle group 4, and the fire extinguishing agent in the fire extinguishing agent storage container 41 is conveyed to the local application nozzle 5 through the fire extinguishing agent delivery pipe fitting 6 for spraying;

[0055] The assembly component 12 includes a U-shaped frame plate 121. Two opposite relief grooves capable of being respectively clamped with both sides of the U-shaped frame plate 121 are provided in the rear structure of the first composite base 1. The front end of the U-shaped frame plate 121 is sleeved outside the middle of the corresponding fire extinguishing agent storage container 41. A long threaded rod 122 is connected to the rear end of the U-shaped frame plate 121. One end of the long threaded rod 122 is threadedly connected with a limit nut 123 capable of being attached to the rear surface of the first composite base 1. The provided assembly component 12 can ensure the stable assembly of the fire extinguishing agent bottle group 4 and the first composite base 1, and the assembly component 12 itself can have the use effect of reciprocating disassembly or installation.

[0056] In the specific implementation process of this embodiment:

[0057] The fire extinguishing agent delivery pipe fitting 6 is connected to the fire extinguishing agent storage container 41 through the container valve assembly 42 by a multi-branch structure design, which can meet the use requirements of synchronous or single detection of multiple fire extinguishing agent bottle groups 4. The fixing of the fire extinguishing agent bottle group 4 inside the first composite base 1 can also be assisted by the assembly component 12. Specifically: the front end of the U-shaped frame plate 121 is sleeved outside the middle of the fire extinguishing agent storage container 41, and the rear end of the U-shaped frame plate 121 and the associated long threaded rod 122 at the rear end are both sleeved in the corresponding two relief grooves on the first composite base 1. Then, by using the spiral locking of the limit nut 123 and the long threaded rod 122, the fire extinguishing agent bottle group 4 can be stably installed inside the first composite base 1.

[0058] Please refer to Figure 9 , the test method includes: S1. Pressure measurement points are set at different radii to form a pressure measurement array to obtain pressure data at different positions;

[0059] S2. Multiply the pressure value P collected at each pressure measurement point by the pressure collection area of each pressure measurement point to obtain the gas impulse force at each pressure measurement point. Add up the gas impulse force values at each pressure measurement point and compare them with the flame lift force value. As long as the sum of the gas impulse force values is greater than the flame lift force value, it can be proved that the local application fire extinguishing system can suppress the flame and achieve effective fire extinguishing.

[0060] S3. The calculation formula is F = PS, where F is the gas impulse force, unit: N; P is the pressure, unit: Pa (N / m2); S is the pressure collection area, unit: m2, and all pressure measurement points are the center points of the area.

[0061] S4. Calculation method of the pressure collection area S: Determine a central pressure measurement point, marked as A, and mark the two adjacent pressure measurement points before and after the central pressure measurement point as B and C respectively.

[0062] Mark two auxiliary punctuation points respectively based on half of the distances from B and C to A, and name the two auxiliary punctuation points D and E respectively. Then, draw the corresponding arc lines of D and E respectively based on the center of the annular plate. Then, extend 22.5-degree angles in the left and right directions at the positions of D and E with A as the center, thus forming two D1s and two E1s. Then, connect the two D1s and the two E1s to obtain the pressure collection area S.

[0063] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. At the same time, in the drawings of the present invention, the filling patterns are only for distinguishing layers and are not subject to any other limitations.

[0064] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nozzle gas impulse performance testing device in a local application fire extinguishing system, comprising a first composite base (1), a second composite base (2), and an auxiliary bracket (3), wherein the auxiliary bracket (3) is located between the first composite base (1) and the second composite base (2), and is characterized in that: A fire extinguishing agent bottle group (4) is installed in the first composite base (1), a local application nozzle (5) is installed on one side of the top of the auxiliary bracket (3), and a fire extinguishing agent delivery pipe (6) is installed between the top port of the local application nozzle (5) and the fire extinguishing agent bottle group (4); A test platform (7) aligned with the local application nozzle (5) is installed on the top of the second composite base (2), and the test platform (7) is composed of an annular plate and eight support plates arranged along the circumference of the annular plate. A plurality of transition pipes (8) are installed in the annular plate and the eight support plates, and a pressure measuring component (9) is installed at the bottom of the transition pipe (8).

2. The nozzle gas impulse performance testing device in the local application fire extinguishing system according to claim 1 is characterized by: The transition pipe (8) comprises a transition pipe body (81) and a limiting screw sleeve (82). The middle portion of the transition pipe body (81) is clamped in a corresponding annular plate or a corresponding support plate, and an external thread is provided on the surface of one end of the top of the transition pipe body (81). The limiting screw sleeve (82) is threadedly connected to the surface of one end of the top of the transition pipe body (81) and can be fitted and connected with the top surface of the corresponding annular plate or the top surface of the corresponding support plate.

3. The nozzle gas impulse performance testing device in the local application fire extinguishing system according to claim 2 is characterized in that: The pressure measuring component (9) comprises a micro differential pressure transmitter body (91), the top of which is respectively provided with a first connection end (92) and a second connection end (93), one end of the first connection end (92) is fixedly sleeved with one end of the bottom of the corresponding transition pipe body (81), and the port of the second connection end (93) is in an open state.

4. The nozzle gas impulse performance testing device in the local application fire extinguishing system according to claim 3 is characterized in that: An auxiliary push rod (94) is installed on the top of the micro differential pressure transmitter body (91), and the auxiliary push rod (94) can be closely connected with the bottom surface of the corresponding annular plate or the bottom surface of the corresponding support plate after the corresponding transition tube body (81) and the limiting screw sleeve (82) are screw-locked, and the micro differential pressure transmitter body (91) is electrically connected to the data acquisition device (10) through a wire.

5. The nozzle gas impulse performance testing device in the local application fire extinguishing system according to claim 4 is characterized in that: The data acquisition device (10) comprises a cabinet and a data acquisition device installed in the cabinet, and a side wall of the cabinet is provided with a plurality of clearance grooves for installing wires.

6. The nozzle gas impulse performance testing device in the local application fire extinguishing system according to claim 1, characterized in that: The ends of the eight support plates away from the annular plate are connected together to form an annular platform, and an auxiliary baffle (11) is installed between two adjacent support plates. A transition pipe (8) is installed in the annular platform. Four transition pipes (8) are installed in the eight support plates at equal intervals. Sixteen transition pipes (8) are installed in the annular plate at equal intervals along its own circumference. The number of the pressure measuring components (9) is the same as the number of the transition pipes (8) and they are numbered in sequence.

7. The nozzle gas impulse performance testing device in the local application fire extinguishing system according to claim 6, characterized in that: The second composite base (2) comprises a base body (21), an electric cylinder (22), and a movable plate (23); the electric cylinder (22) is installed in the middle of the base body (21), and the output end of the electric cylinder (22) is transmission-connected to the middle of the movable plate (23); and a transmission shaft (25) transmission-connected to the annular plate is mounted in the outer ring structure of the movable plate (23).

8. The nozzle gas impulse performance testing device in the local application fire extinguishing system according to claim 7, characterized in that: The end of the transmission shaft (25) away from the annular plate is clamped with a limiting sleeve (24) installed on the top of the base body (21); a through groove is provided in the outer ring structure of the base body (21); and one side of the base body (21) is fixedly connected to one side of the bottom of the auxiliary bracket (3).

9. The nozzle gas impulse performance testing device in the local application fire extinguishing system according to claim 1, characterized in that: A plurality of fire extinguishing agent bottle groups (4) are mounted inside the first composite base (1), wherein the fire extinguishing agent bottle group (4) comprises a fire extinguishing agent storage container (41) and a container valve assembly (42), an assembly component (12) is arranged between the middle of the fire extinguishing agent storage container (41) and the rear end structure of the first composite base (1), one end of the fire extinguishing agent delivery pipe (6) is connected to the top port of the local application nozzle (5), and the other end of the fire extinguishing agent delivery pipe (6) is fixedly connected to the fire extinguishing agent storage container (41) via the container valve assembly (42), and the fire extinguishing agent storage container (41) is connected to the fire extinguishing agent storage container (41) via the container valve assembly (42). A starting gas bottle group (13) is arranged on one side of the fire extinguishing agent bottle group (4), a solenoid valve is arranged on the top of the starting gas bottle group (13), a connecting pipe is installed between the top port of the starting gas bottle group (13) and the container valve assembly (42), and after the solenoid valve of the starting gas bottle group (13) is opened, the internal medium of the starting gas bottle group (13) can open the container valve assembly (42) through the connecting pipe to start the fire extinguishing agent bottle group (4), and the fire extinguishing agent in the fire extinguishing agent storage container (41) is transported to the local application nozzle (5) through the fire extinguishing agent transport pipe (6) for spraying; The assembly component (12) comprises a U-shaped frame plate (121); the rear end structure of the first composite base (1) is provided with two relative clearance grooves capable of being respectively engaged with the two sides of the U-shaped frame plate (121); the front end of the U-shaped frame plate (121) is sleeved on the outer side of the middle part of the corresponding fire extinguishing agent storage container (41); the rear end of the U-shaped frame plate (121) is connected to a long threaded rod (122); one end of the long threaded rod (122) is threadedly connected to a limit nut (123) capable of being fitted and connected with the rear end surface of the first composite base (1).

10. The method for testing the nozzle gas impulse performance testing device in a local application fire extinguishing system according to any one of claims 1 to 9, characterized in that: S1. Setting pressure measuring points at different radii to form a pressure measurement array to obtain pressure data at different positions; S2. The gas impulse of each pressure measuring point can be obtained by multiplying the pressure value P collected at each pressure measuring point by the pressure collection area of ​​each pressure measuring point. The gas impulse values ​​of each pressure measuring point are added and then compared with the flame lift value. As long as the sum of the gas impulse values ​​is greater than the flame lift value, it can be proved that the local application of the fire extinguishing system can suppress the flame and achieve effective fire extinguishing; S3, the calculation formula is F = PS, F is the gas impulse, P is the pressure, S is the pressure collection area, and all the pressure collection points are the center points of the area; S4. Calculation method of the pressure collection area S: determine a central pressure collection point, marked as A, and mark the two adjacent pressure collection points before and after the central pressure collection point as B and C respectively; Two auxiliary punctuation points are marked based on the half of the distance between B and C and A, and the two auxiliary punctuation points are named D and E respectively. Then, the arc lines corresponding to D and E are drawn based on the center of the annular plate, and then the lines are extended at an angle of 22.5 degrees in the left and right directions of the positions of D and E with A as the center, thereby forming two D1s and two E1s. Then, the two D1s and the two E1s are connected to obtain the pressure collection area S.

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