A measuring device for the flow characteristics of high-boiling-point or powder fire extinguishing agents inside pipes.

Abstract

This invention relates to a measuring device for the flow characteristics of high-boiling-point or powder fire extinguishing agents within a pipeline, comprising: a fire extinguishing bottle, an input component, a delivery pipeline, a data acquisition module, and a controller. The input component is located at the inlet of the fire extinguishing bottle. The input component includes a fire extinguishing agent filling section and a pressure filling section. The delivery pipeline is used to simulate the flow of a two-phase flow system within the fire extinguishing agent pipeline network. One end of the delivery pipeline is fixedly connected to the outlet of the fire extinguishing bottle. Multiple nodes at different distances from the fire extinguisher outlet are provided on the delivery pipeline. The data acquisition module is used to acquire, in real time, test data reflecting the flow characteristics of the two-phase flow system at multiple nodes within the delivery pipeline. The controller is used to convert the test data into visual charts. This measuring device can test and simulate the flow characteristics of two-phase flow fire extinguishing agents formed by high-boiling-point or powder fire extinguishing agents within a pipeline, thereby facilitating in-depth research on the flow characteristics and improving the fire extinguishing efficiency of the fire extinguishing pipeline network.

Description

Technical Field

[0001] This invention relates to the field of fire extinguishing system piping design optimization, and in particular to a measuring device for the flow characteristics of high-boiling-point or powder fire extinguishing agents within pipes. Background Technology

[0002] The flow characteristics of extinguishing agents are a crucial factor affecting the extinguishing efficiency of fire suppression systems, especially for high-boiling-point and powder extinguishing agents. High-boiling-point extinguishing agents (liquid at room temperature) such as perfluorohexanone, 2-BTP, and hexafluorobutene, and powder extinguishing agents such as ultrafine dry powder are typically stored under nitrogen pressure within fire suppression system networks. During long-term storage, nitrogen mixes with the extinguishing agent, resulting in a two-phase flow within the network when the extinguishing agent is released. Compared to single-medium flow, two-phase flow within pipes is more complex and variable, and its flow characteristics are difficult to detect. This limits the ability to optimize fire suppression system network design to improve extinguishing efficiency. Summary of the Invention

[0003] Therefore, it is necessary to address the difficulty in detecting the flow characteristics of two-phase flow extinguishing agents formed by high-boiling-point or powder extinguishing agents within the fire extinguishing pipeline network, which limits the optimization of the fire extinguishing system network to improve fire extinguishing efficiency. The present invention provides a measuring device for the flow characteristics of high-boiling-point or powder extinguishing agents within the pipeline.

[0004] This invention discloses a measuring device for the flow characteristics of high-boiling-point or powder extinguishing agents within pipes. It is used to detect the flow characteristics of a two-phase flow system formed by a high-boiling-point or powder extinguishing agent as it is injected from a fire extinguisher into the fire extinguishing system piping network. The measuring device includes: a fire extinguishing bottle, an input component, a delivery pipeline, a data acquisition module, and a controller.

[0005] The fire extinguisher bottle has an inlet at one end and an outlet at the other end.

[0006] The input component is located at the inlet of the fire extinguishing cylinder. The input component includes an extinguishing agent filling section and a pressurized filling section. The extinguishing agent filling section and the pressurized filling section are used to deliver the extinguishing agent and pressurized gas into the fire extinguishing cylinder, respectively, thereby regulating the pressure inside the fire extinguishing cylinder and the mass of the extinguishing agent. The extinguishing agent and pressurized gas mix to form a two-phase flow system.

[0007] The delivery pipeline is used to simulate the flow of a two-phase flow system within the extinguishing agent piping network. One end of the delivery pipeline is fixedly connected to the outlet of the fire extinguisher. Multiple nodes with varying distances from the fire extinguisher outlet are installed along the pipeline's extension direction.

[0008] The data acquisition module is used to collect test data in real time, which reflects the flow characteristics of the two-phase flow system at multiple nodes within the pipeline.

[0009] The controller is used to transform test data into visual charts.

[0010] In one embodiment, the test data includes pressure data and temperature data. The data acquisition module includes a pipeline pressure sensor and a pipeline temperature sensor.

[0011] Multiple sets of pipeline pressure sensors are installed. These multiple sets of pipeline pressure sensors are used to detect the pressure at multiple nodes within the delivery pipeline.

[0012] The number of pipeline temperature sensors corresponds to the number of pipeline pressure sensors. Multiple sets of pipeline temperature sensors are used to detect the temperature at multiple nodes within the delivery pipeline.

[0013] In one embodiment, multiple sets of pipe pressure sensors and multiple sets of pipe temperature sensors are distributed along the extension direction of the delivery pipe. Each set of pipe pressure sensors and its corresponding pipe temperature sensor are symmetrically distributed on opposite sides of the delivery pipe.

[0014] In one embodiment, the delivery pipeline includes multiple segmented pipes and multiple four-way connectors. Each pair of adjacent segmented pipes is fixed together by one of the four-way connectors, thereby forming a node on the delivery pipeline. Two of the four-way connectors are connected to two adjacent segmented pipes, and the other two are connected to corresponding pipeline pressure sensors and pipeline temperature sensors, respectively.

[0015] In one embodiment, the input component further includes a four-way connector 2, an internal pressure sensor, and a pressure relief module. One port of the four-way connector 2 is connected to the inlet of the fire extinguishing bottle, and the other two ports are connected to the extinguishing agent filling section and the pressure filling section, respectively. The last port of the four-way connector 2 is connected to a three-way connector, which in turn connects to the internal pressure sensor and the pressure relief module. The internal pressure sensor is used to detect the real-time pressure inside the fire extinguishing bottle. The pressure relief module is used to release the pressure inside the fire extinguishing bottle.

[0016] The controller also determines whether the real-time pressure inside the fire extinguishing bottle exceeds a preset pressure threshold. When the real-time pressure exceeds the preset pressure threshold, the controller calculates the difference between the real-time pressure and the preset pressure threshold, and controls the pressure relief module to release the excess pressure inside the fire extinguishing bottle based on the difference.

[0017] In one embodiment, the end of the delivery pipeline near the fire extinguisher bottle outlet is designated as the starting end, and the other end as the ending end. Multiple nodes are defined sequentially from the starting end to the ending end as the first node, the second node, and so on, up to the Nth node. The measuring device also includes a manual valve and a pneumatic valve.

[0018] The manual valve is located between the outlet of the fire extinguisher bottle and the first node.

[0019] The pneumatic valve is located between the first node and the second node.

[0020] In one embodiment, a viewing section is also provided between the pneumatic valve and the first node. The viewing section has a transparent cuboid cavity structure, and the opposite sides of the viewing section are fixedly installed on the conveying pipe.

[0021] In one embodiment, the measuring device further includes a platform and a lifting mechanism.

[0022] The stand is used to support the fire extinguishing bottles and delivery pipelines.

[0023] The lifting mechanism is used to drive the fire extinguisher bottles to rise and fall. The lifting mechanism is fixedly mounted on the platform.

[0024] In one embodiment, the lifting mechanism includes a slide rail, a slider, a sheave, and a wire rope. The slide rail is fixedly mounted on a frame, and its extension direction is perpendicular to the horizontal plane. One end of the slider is slidably mounted on the slide rail, and the other end is fixedly connected to a fire extinguisher bottle. The sheave is fixedly connected to the frame, and a rocker arm is provided on the sheave. One end of the wire rope is housed in the sheave, and the other end is fixedly mounted to the top of the slider. A lifting ring is fixedly connected to the top of the slider. A hook is fixedly connected to the end of the wire rope. The wire rope is fixedly mounted to the slider through the cooperation between the hook and the lifting ring.

[0025] In one embodiment, the measuring device further includes a collection mechanism.

[0026] The collection mechanism is used to collect the two-phase flow system ejected from the delivery pipeline. The collection mechanism includes a temperature-controlled chamber and a collection compartment. The collection compartment is located inside the temperature-controlled chamber, forming a gap between it and the chamber. The gap is filled with a layer of dry ice. The collection compartment is connected to and communicates with the end of the delivery pipeline furthest from the fire extinguishing cylinder.

[0027] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0028] 1. This measuring device simulates the flow of extinguishing agent in a two-phase flow system within a fire extinguishing system network by setting up fire extinguishing bottles and delivery pipelines. By establishing data acquisition modules at multiple nodes along the delivery pipeline, it collects real-time test data reflecting the flow characteristics of the two-phase flow system at each node. This allows for the testing and simulation of the flow characteristics of two-phase flow systems formed by high-boiling-point extinguishing agents or powder extinguishing agents within the pipeline. This facilitates in-depth research into the flow characteristics, providing rich and effective data support for the optimized design of fire extinguishing system networks and improving the fire extinguishing efficiency of the fire extinguishing network.

[0029] 2. This measuring device, by setting a four-way connector at the inlet of the fire extinguishing bottle, facilitates the adjustment of the pressure inside the fire extinguishing bottle and also supports the adjustment of the mass of high-boiling-point extinguishing agent or powder extinguishing agent inside the fire extinguishing bottle, thereby forming a two-phase flow system under different conditions, so as to realize the measurement of the jet fluid characteristics of different test objects.

[0030] 3. This measuring device can also move the fire extinguishing bottle via a lifting mechanism, facilitating the disassembly or installation of the fire extinguishing bottle and the delivery pipeline. It can also move the fire extinguishing bottle to switch between delivery pipelines of different design specifications. This allows for conducting multiple sets of control experiments to explore the changes in the flow characteristics of the extinguishing agent within different delivery pipelines. Furthermore, the measuring device can collect the discharged extinguishing agent via a collection mechanism, enabling recycling. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural schematic diagram of the measuring device for the flow characteristics of high-boiling-point fire extinguishing agent in a tube according to Embodiment 1 of the present invention;

[0032] Figure 2 for Figure 1 A three-dimensional structural diagram of the fire extinguishing bottle, input components, manual valves, pneumatic valves, and local delivery pipelines;

[0033] Figure 3 for Figure 2 The main view of the structure;

[0034] Figure 4 for Figure 1 Top view of the structure;

[0035] Figure 5 for Figure 4 Installation diagram of the four-way connector 1;

[0036] Figure 6 for Figure 2 A magnified view of a portion of the image;

[0037] Figure 7 This is a three-dimensional structural diagram of the measuring device in Embodiment 2 of the present invention;

[0038] Figure 8 for Figure 7 A three-dimensional structural diagram of the measuring device from another perspective;

[0039] Figure 9 for Figure 8 A three-dimensional structural diagram of the lifting mechanism;

[0040] Figure 10 for Figure 8 A schematic diagram of the internal cross-section of the collection mechanism.

[0041] Explanation of main component symbols

[0042] 1. Fire extinguishing bottle; 21. Internal pressure sensor; 22. Four-way connector II; 23. Extinguishing agent filling section; 24. Pressure filling section; 25. Pressure relief module; 3. Delivery pipeline; 31. Four-way connector I; 32. Segmented pipe; 41. Pipeline pressure sensor; 42. Pipeline temperature sensor; 5. Manual valve; 6. Pneumatic valve; 7. Perspective section; 8. Stand; 91. Slide rail; 92. Slider; 93. Rope pulley; 94. Wire rope; 10. Constant temperature chamber; 11. Collection bin.

[0043] The above description of the main component symbols, together with the accompanying drawings and specific embodiments, provides a more detailed explanation of the present invention. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] It should be noted that when a component is said to be "installed on" another component, it can be directly on the other component or it may be in a component that is centered on it. When a component is said to be "set on" another component, it can be directly set on the other component or it may also be in a component that is centered on it. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or it may also be in a component that is centered on it.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0047] Example 1

[0048] Please see Figure 1 This embodiment provides a measuring device for the flow characteristics of high-boiling-point or powder extinguishing agents in pipes. It is used to detect the flow characteristics of a two-phase flow system formed by high-boiling-point or powder extinguishing agents as it is injected from the fire extinguisher into the fire extinguishing system pipeline.

[0049] The measuring device includes: a fire extinguishing bottle 1, an input component, a delivery pipeline 3, a data acquisition module, and a controller. In this embodiment, the measuring device may also include a manual valve 5 and a pneumatic valve 6.

[0050] Please combine Figure 2 and Figure 3 Fire extinguisher bottle 1 has an inlet at one end and an outlet at the other end. Fire extinguisher bottle 1 can be made of 316L stainless steel, with a length of 580mm and a volume of 4.5L.

[0051] An input component is located at the inlet of the fire extinguishing bottle 1. The input component includes an extinguishing agent filling section 23 and a pressure filling section 24. In this embodiment, the input component may also include a four-way connector 22, an internal pressure sensor 21, and a pressure relief module 25. The extinguishing agent filling section 23 and the pressure filling section 24 are used to deliver the extinguishing agent and pressurized gas into the fire extinguishing bottle 1, respectively, thereby regulating the pressure inside the fire extinguishing bottle 1 and the mass of the extinguishing agent. The extinguishing agent and pressurized gas form a two-phase flow system after mixing. In this embodiment, perfluorohexanone can be used as the extinguishing agent, and nitrogen can be used as the pressurized gas.

[0052] The extinguishing agent filling section 23 can consist of a four-way connector and a sealing screw, which is a 13mm diameter, 9mm long external thread screw. The pressure filling section 24 can consist of a 1 / 4 NPT three-way connector and a Swagelok ball valve. When filling with pressure, one end of the ball valve is connected to a nitrogen pressure source.

[0053] One of the ports of the four-way connector 22 can be connected to the inlet of the fire extinguishing bottle 1, and the other two ports can be connected to the extinguishing agent filling section 23 and the pressure filling section 24, respectively. The last port of the four-way connector 22 can be connected to a tee connector, and then connected to the internal pressure sensor 21 and the pressure relief module 25, respectively.

[0054] The pressure sensor 21 inside the fire extinguishing bottle 1 is used to detect the real-time pressure inside the bottle. In this embodiment, the pressure sensor 21 can be an Omega DPG9145-10K pressure gauge with a maximum range of 10,000 psi and an accuracy of 0.25%.

[0055] The pressure relief module 25 is used to release the pressure inside the fire extinguishing bottle 1. When the controller determines that the real-time pressure inside the fire extinguishing bottle 1 is greater than a preset pressure threshold, it calculates the difference between the real-time pressure and the preset pressure threshold, and controls the pressure relief module 25 to release the excess pressure inside the fire extinguishing bottle 1 based on the difference. In this embodiment, the pressure relief module 25 can consist of an air inlet pipe and a GENTEC SS-RN32RF-NT8-TF8-5800 safety valve with a rated pressure of 580 psi. When the air pressure inside the fire extinguishing bottle 1 exceeds 580 psi, the safety valve will automatically release pressure, reducing the pressure to below 580 psi.

[0056] Please see Figure 4The delivery pipe 3 is used to simulate the flow of a two-phase flow system within the extinguishing agent piping network. One end of the delivery pipe 3 is fixedly connected to the outlet of the fire extinguishing bottle 1. The delivery pipe 3 has multiple nodes at different distances from the outlet of the fire extinguishing bottle 1 along its extension direction. The delivery pipe 3 may include multiple segmented pipes 32 and multiple four-way connectors 31. Each pair of adjacent segmented pipes 32 can be fixed together by one of the four-way connectors 31, thus forming one node on the delivery pipe 3. The segmented pipes 32 may be made of stainless steel with an outer diameter of 19 mm and an inner diameter of 14 mm.

[0057] Please see Figure 5 Two of the ports on the four-way connector 31 can be connected to two adjacent segmented pipes 32 via a compression fitting and a straight connector, respectively. The other two ports are connected to the corresponding pipe pressure sensor 41 and pipe temperature sensor 42, respectively.

[0058] The data acquisition module is used to collect test data in real time, reflecting the flow characteristics of the two-phase flow system at multiple nodes within the transport pipeline 3. The test data includes pressure and temperature data. The data acquisition module may include a pipeline pressure sensor 41 and a pipeline temperature sensor 42.

[0059] Five sets of pipeline pressure sensors 41 can be provided. Multiple sets of pipeline pressure sensors 41 are used to detect the pressure at multiple nodes within the transport pipeline 3. In this embodiment, the pipeline pressure sensors 41 can be UNIK5000 pressure sensors, model PTX 5022-TC-A1-CA-H0-PF, with a pressure measurement range of 0-6 MPa. Five sets of pipeline pressure sensors 41 are used to measure pressure changes within the transport pipeline 3. The number of pipeline temperature sensors 42 corresponds to the number of pipeline pressure sensors 41. Multiple sets of pipeline temperature sensors 42 are used to detect the temperature at multiple nodes within the transport pipeline 3. The pipeline temperature sensors 42 can be Omega model PM-1 / 10-1 / 8-4-1 / 4-T-3 resistance thermometers. Five sets of pipeline temperature sensors 42 are used to measure temperature changes within the transport pipeline 3.

[0060] In addition, the five sets of pipeline pressure sensors 41 and the five sets of pipeline temperature sensors 42 can all be distributed along the extension direction of the conveying pipeline 3. Each set of pipeline pressure sensors 41 and the corresponding set of pipeline temperature sensors 42 can be symmetrically distributed on opposite sides of the conveying pipeline 3, so as to achieve the purpose of monitoring the temperature and pressure changes at the same node in sequence.

[0061] The controller is used to convert test data into visual charts. In this embodiment, the controller may include an NI PXIe-1092 host and a data acquisition card. The controller can convert the electrical signals collected by multiple sets of pipe pressure sensors 41 and pipe temperature sensors 42 into visual charts, and can set the corresponding sampling frequency to meet experimental requirements.

[0062] Please combine Figure 6 The delivery pipeline 3 has one end near the outlet of the fire extinguisher bottle 1 as the starting end and the other end as the ending end. Multiple nodes are defined sequentially from the starting end to the ending end as the first node, the second node, and so on, up to the fifth node. A manual valve 5 is located between the outlet of the fire extinguisher bottle 1 and the first node. A pneumatic valve 6 is located between the first node and the second node.

[0063] In this embodiment, the manual valve 5 can be a GENTEC SS-BV514-FNT12 ball valve. The ball valve is connected to the cylinder through a straight connector. During the experiment, the ball valve controls the release of the fire extinguishing bottle outlet section.

[0064] The pneumatic valve 6 can be model JHA0020 SR K10, with an operating temperature range of -20℃ to 80℃ and a maximum pressure of 0.8MPa. During operation, the pneumatic valve 6 is used in conjunction with an air compressor and a DC power supply. The air compressor provides the power source for the pneumatic operation of the valve 6, while the DC power supply controls the release and shut-off of the air supply. It should also be noted that the length of the delivery pipe 3 before the inlet of the pneumatic valve 6 can be set to 360mm, and the length of the delivery pipe 3 after the outlet of the valve 6 can be set to 4000mm.

[0065] The functions of manual valve 5 and pneumatic valve 6 will be explained below:

[0066] For manual valve 5, it is closed when filling the fire extinguishing agent into fire extinguishing bottle 1 to facilitate filling and pressure measurement. For pneumatic valve 6, its function is to control instantaneous spraying.

[0067] In actual use, first close the manual valve 5, then fill the fire extinguishing bottle 1 with extinguishing agent and pressurized gas. After filling, open the manual ball valve to allow the two-phase flow system to flow to the pneumatic valve 6. At this point, the data acquisition module located at the first node can measure the pressure and temperature inside the pipe before spraying. After the pneumatic valve 6 is opened, the two-phase flow system will spray out instantly, allowing the data acquisition module to measure the changes in temperature and pressure inside the pipe before and during spraying.

[0068] A viewing section 7 may also be provided between the pneumatic valve 6 and the first node. The viewing section 7 has a transparent cuboid cavity structure, and its opposite sides are fixedly installed on the conveying pipe 3. In this embodiment, the two sides of the viewing section 7 may be made of quartz glass, and at least one side may be a circular observation window with a diameter of 33mm.

[0069] In addition, the viewing section 7 can be connected to the delivery pipe 3 via a straight connector. In actual use, the flow of extinguishing agent and nitrogen inside the pipe can be clearly observed through the viewing section 7, and it also provides a good field of view for using a high-speed camera to photograph the flow of extinguishing agent and nitrogen.

[0070] In this embodiment, a method for measuring the flow characteristics within a fire extinguishing agent pipe is also provided. Perfluorohexanone can be used to test the feasibility of the aforementioned measuring device. Other high-boiling-point fire extinguishing agents and powder fire extinguishing agents can also be studied based on this measuring device and with reference to the following measuring method to investigate the flow characteristics within the pipes of high-boiling-point fire extinguishing agents and powder fire extinguishing agents. The measurement method may include the following steps:

[0071] (1) Close manual valve 5 and pneumatic valve 6. Measure 500 mL of perfluorohexanone using a 1 L beaker. Remove the sealing screw of the extinguishing agent filling section 23. First, use a peristaltic pump to extract the perfluorohexanone, then use a vacuum pump to evacuate the fire extinguishing bottle 1. Then, inject all the perfluorohexanone into the fire extinguishing bottle 1 and reinstall the sealing screw. Connect the pressure filling section 24 to an external nitrogen pressure source. Open the ball valve of the pressure filling section 24 and observe the reading of the pressure sensor 21 inside the bottle. When the pressure inside the bottle reaches 4 MPa, close the ball valve and let it stand for 5 minutes after pressurization.

[0072] (2) Using the controller, the sampling time of the pipeline pressure sensor 41 and the pipeline temperature sensor 42 is set to 0.005s and 0.01s respectively.

[0073] (3) Open the manual valve 5 and keep the pneumatic valve 6 closed, so that the two-phase flow system flows to the front of the pneumatic valve 6, and the data acquisition module measures the pressure and temperature in the pipe before injection.

[0074] (4) Open the pneumatic valve 6 to allow the two-phase flow system to be ejected, so that the data acquisition module can measure the changes in temperature and pressure inside the pipe before and during the injection process.

[0075] (5) Use a high-speed camera directly facing the transparent section 7 to take real-time pictures of the two-phase flow system passing through the transparent section 7.

[0076] (6) The pressure and temperature data collected in the conveying pipeline 3 are plotted and analyzed.

[0077] (7) The perfluorohexanone sprayed from the conveying pipe 3 is recycled.

[0078] It should be noted that, in step (1), when injecting the extinguishing agent into the fire extinguishing bottle 1, for high-boiling-point extinguishing agents, a syringe can be used to first draw out the extinguishing agent and then inject it into the fire extinguishing bottle 1; or a peristaltic pump can be used to directly inject the extinguishing agent into the bottle; or a vacuum pump can be used to first evacuate the fire extinguishing bottle 1 and then draw out the extinguishing agent. For powder extinguishing agents, a funnel can be connected to the ball valve of the extinguishing agent filling section 23, and the powder extinguishing agent enters the fire extinguishing bottle 1 through the funnel, with the extinguishing agent flow rate controlled by the ball valve.

[0079] In addition, step (5) can be performed simultaneously with steps (3) and (4) respectively, or it can be performed simultaneously with only step (4).

[0080] Example 2

[0081] Please see Figure 7 and Figure 8 This embodiment provides a measuring device for the flow characteristics of high-boiling-point or powder fire extinguishing agents in a pipe. The difference from the device in Embodiment 1 is that, based on the measuring device in Embodiment 1, the measuring device in this embodiment may further include: a platform 8, a lifting mechanism, and a collection mechanism.

[0082] The frame 8 supports the fire extinguishing bottle 1 and the delivery pipe 3. In this embodiment, the frame 8 can consist of two parts: a fire extinguishing bottle fixing frame and a spray section fixing frame. The frame 8 may include several 80×80×2000mm aluminum profiles, several 80×80×800mm aluminum profiles, multiple casters, and several corner brackets. The aluminum profiles can be connected to each other using corner brackets and screws to form a frame structure. The casters can be self-locking casters for easy fixing or moving of the entire device.

[0083] In this embodiment, a pipe clamp with a diameter of 20mm can be used to fix the conveying pipe 3 on the stand 8.

[0084] Please see Figure 9 The lifting mechanism is used to drive the fire extinguisher bottle 1 to rise and fall. The lifting mechanism can be fixedly installed on the platform 8. The lifting mechanism may include a slide rail 91, a slider 92, a pulley 93, and a wire rope 94.

[0085] The slide rail 91 can be fixedly mounted on the frame 8 using multiple M6 screws, and the extension direction of the slide rail 91 is perpendicular to the horizontal plane. The cylindrical guide rail of the slide rail 91 has a diameter of 30mm, a length of 1000mm, and a width of 80mm.

[0086] One end of the slider 92 is slidably mounted on the slide rail 91, and the other end is fixedly connected to the fire extinguishing bottle 1. In this embodiment, the slider 92 can be composed of two sub-blocks, and the two sub-blocks form an installation space for fixing the fire extinguishing bottle 1, thereby improving the stability of the fire extinguishing bottle 1.

[0087] A pulley 93 is fixedly connected to the frame 8, and a rocker arm is provided on the pulley 93. One end of the wire rope 94 is housed in the pulley 93, and the other end is fixedly installed on the top of the slider 92. The diameter of the wire rope is 4mm. In this embodiment, a lifting ring is fixedly connected to the top of the slider 92. A hook is fixedly connected to the end of the wire rope 94. The wire rope 94 is fixedly installed on the slider 92 through the cooperation between the hook and the lifting ring.

[0088] The rocker arm drives the pulley 93 to rotate, thereby adjusting the length of the steel wire rope 94 and thus the height of the slider 92 and the fire extinguishing bottle 1. In this embodiment, adjusting the height of the fire extinguishing bottle 1 facilitates the disassembly or installation between the fire extinguishing bottle 1 and the delivery pipe 3. Alternatively, multiple parallel delivery pipes 3 of different heights can be simultaneously installed on the test bench 8. By adjusting the height of the fire extinguishing bottle 1, it can be switched between multiple delivery pipes 3, facilitating multiple sets of control experiments to explore the impact of different specifications of delivery pipes 3 on the flow characteristics of the two-phase flow extinguishing agent within the pipeline.

[0089] Please see Figure 10 The collection mechanism can be used to collect the two-phase flow system ejected from the delivery pipe 3. The collection mechanism may include a constant temperature chamber 10 and a collection bin 11.

[0090] The collection chamber 11 is disposed inside the constant temperature chamber 10, forming a gap between them. A layer of dry ice can be filled in the gap to cool the extinguishing agent within the collection chamber 11. The collection chamber 11 is connected to and communicates with the end of the delivery pipeline 3 furthest from the fire extinguishing bottle 1. In this embodiment, the internal volume of the collection chamber 11 is 20L. The constant temperature chamber can be a BPHJS-250C high and low temperature humidity test chamber with a temperature range of -60℃ to 130℃, to insulate the collection chamber 11.

[0091] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A measuring device for the flow characteristics of high-boiling-point or powder fire extinguishing agents within a pipe, characterized in that, It is used to detect the flow characteristics of a two-phase flow system formed by high-boiling-point or powder extinguishing agents as it is injected from the fire extinguisher into the fire extinguishing system piping; the measuring device includes: Fire extinguisher (1), with an inlet at one end and an outlet at the other end; An input component is provided at the inlet of the fire extinguishing bottle (1); the input component includes a fire extinguishing agent filling section (23) and a pressure filling section (24); the fire extinguishing agent filling section (23) and the pressure filling section (24) are respectively used to transport the fire extinguishing agent and the pressurized gas into the fire extinguishing bottle (1), thereby realizing the adjustment of the pressure and the mass of the fire extinguishing agent in the fire extinguishing bottle (1); wherein, the fire extinguishing agent and the pressurized gas are mixed to form the two-phase flow system; A delivery pipeline (3) is used to simulate the flow of the two-phase flow system within the extinguishing agent pipeline network; one end of the delivery pipeline (3) is fixedly connected to the outlet of the fire extinguishing bottle (1); the delivery pipeline (3) has multiple nodes along its extension direction at different distances from the fire extinguisher outlet; and A data acquisition module is used to acquire in real time: test data reflecting the flow characteristics of the two-phase flow system at multiple nodes within the transport pipeline (3); and A controller, which is used to transform the test data into visual charts; The input component further includes a four-way connector (22), an internal pressure sensor (21), and a pressure relief module (25). One interface of the four-way connector (22) is connected to the inlet of the fire extinguishing bottle (1), and the other two interfaces are connected to the extinguishing agent filling section (23) and the pressure filling section (24), respectively. The last interface of the four-way connector (22) is connected to a three-way connector, which in turn connects to the internal pressure sensor (21) and the pressure relief module (25), respectively. The internal pressure sensor (21) is used to detect the real-time pressure inside the fire extinguishing bottle (1). The pressure relief module (25) is used to release the pressure inside the fire extinguishing bottle (1). The controller is also used to determine whether the real-time pressure in the fire extinguishing bottle (1) is greater than a preset pressure threshold; when the real-time pressure is greater than the preset pressure threshold, the controller calculates the difference between the real-time pressure and the preset pressure threshold, and controls the pressure relief module (25) to release the excess pressure in the fire extinguishing bottle (1) according to the difference.

2. The measuring device for the flow characteristics of high-boiling-point or powder fire extinguishing agents in pipes according to claim 1, characterized in that, The test data includes pressure data and temperature data; the data acquisition module includes: The pipeline pressure sensor (41) is provided in multiple sets; the multiple sets of pipeline pressure sensors (41) are used to detect the pressure at multiple nodes in the conveying pipeline (3); Pipeline temperature sensors (42) are provided in a number corresponding to pipeline pressure sensors (41); multiple sets of pipeline temperature sensors (42) are used to detect the temperature at multiple nodes in the conveying pipeline (3).

3. The measuring device for the flow characteristics of high-boiling-point or powder fire extinguishing agents in pipes according to claim 2, characterized in that, Multiple sets of pipeline pressure sensors (41) and multiple sets of pipeline temperature sensors (42) are distributed along the extension direction of the conveying pipeline (3); each set of pipeline pressure sensors (41) and corresponding pipeline temperature sensors (42) are symmetrically distributed on opposite sides of the conveying pipeline (3).

4. The measuring device for the flow characteristics of high-boiling-point or powder fire extinguishing agents in pipes according to claim 3, characterized in that, The conveying pipeline (3) includes multiple segmented pipes (32) and multiple four-way connectors (31); each pair of adjacent segmented pipes (32) is fixed by one of the four-way connectors (31), thereby forming one of the nodes on the conveying pipeline (3); two of the interfaces of the four-way connector (31) are connected to the two adjacent segmented pipes (32) respectively, and the other two interfaces are connected to the corresponding pipeline pressure sensor (41) and pipeline temperature sensor (42) respectively.

5. The measuring device for the flow characteristics of high-boiling-point or powder fire extinguishing agents in pipes according to claim 1, characterized in that, The delivery pipeline (3) has one end near the outlet of the fire extinguisher bottle (1) as the beginning end and the other end as the end end; from the beginning end to the end end, the multiple nodes are defined as the first node, the second node, ..., up to the Nth node; the measuring device also includes: A manual valve (5) is installed between the outlet of the fire extinguisher (1) and the first node; A pneumatic valve (6) is disposed between the first node and the second node.

6. The measuring device for the flow characteristics of high-boiling-point or powder fire extinguishing agents in pipes according to claim 5, characterized in that, A transparent section (7) is also provided between the pneumatic valve (6) and the first node; the transparent section (7) has a transparent cuboid cavity structure, and the opposite sides of the transparent section (7) are respectively fixedly installed on the conveying pipe (3).

7. The measuring device for the flow characteristics of high-boiling-point or powder fire extinguishing agents in pipes according to claim 1, characterized in that, The measuring device further includes: A stand (8) is used to support the fire extinguishing bottle (1) and the delivery pipe (3); A lifting mechanism is used to drive the fire extinguishing bottle (1) to rise and fall; the lifting mechanism is fixedly installed on the platform (8).

8. The measuring device for the flow characteristics of high-boiling-point or powder fire extinguishing agents in pipes according to claim 7 is characterized in that, The lifting mechanism includes a slide rail (91), a slider (92), a rope wheel (93), and a wire rope (94); the slide rail (91) is fixedly installed on the platform (8), and the extension direction of the slide rail (91) is perpendicular to the horizontal plane; one end of the slider (92) is slidably installed on the slide rail (91), and the other end is fixedly connected to the fire extinguisher (1); the rope wheel (93) is fixedly connected to the platform (8), and a rocker arm is provided on the rope wheel (93); one end of the wire rope (94) is stored on the rope wheel (93), and the other end is fixedly installed on the top of the slider (92); a lifting ring is fixedly connected to the top of the slider (92); a hook is fixedly connected to the end of the wire rope (94); the wire rope (94) is fixedly installed on the slider (92) through the cooperation between the hook and the lifting ring.

9. The measuring device for the flow characteristics of high-boiling-point or powder fire extinguishing agents in pipes according to claim 1, characterized in that, The measuring device further includes: A collection mechanism for collecting the two-phase flow system ejected from the delivery pipe (3); the collection mechanism includes a constant temperature chamber (10) and a collection chamber (11); the collection chamber (11) is disposed inside the constant temperature chamber (10) and forms a gap with the constant temperature chamber (10); the gap is filled with a layer of dry ice; the collection chamber (11) is connected to and communicates with the end of the delivery pipe (3) away from the fire extinguishing bottle (1).

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