Three-stage pipeline structure for fire extinguishing agent pack package-level transportation and multi-partition experiment platform

Abstract

The invention discloses a three-stage pipeline structure for fire extinguishing agent pack package-level transportation and a multi-partition experiment platform, and the three-stage pipeline structure comprises a first-stage pipeline which is used for connecting a pump room and transporting a fire extinguishing agent into a cabin; the second-stage pipeline is used for being connected with a cabin and conveying the fire extinguishing agent to each column; the third-stage pipeline is used for connecting all the columns and conveying the fire extinguishing agent to the pack; and the pressure of the first-stage pipeline, the pressure of the second-stage pipeline and the pressure of the third-stage pipeline are gradually reduced layer by layer. According to the invention, normal pressure spraying can be ensured, and the structure of the battery pack is not damaged.

Description

Technical Field

[0001] The present invention belongs to the technical fields of fire extinguishing agent transportation and pipeline transportation, and particularly relates to a three-stage pipeline structure for fire extinguishing agent transportation at the pack level and a multi-zone experimental platform. Background Art

[0002] In the field of fire extinguishing agent transportation at the pack level of a storage battery compartment, existing technical solutions have been able to achieve the transportation of fire extinguishing agent from the storage compartment to the pack. These solutions generally involve a series of pipelines and pipeline structures for transporting the fire extinguishing agent from the source to the target location.

[0003] Although the existing technologies can achieve the basic transportation of fire extinguishing agent, they lack precision in controlling pressure, especially the standards for the friction resistance coefficient along the length of different pipe diameters and pipe materials and the local resistance coefficient of specific structures. This means that in practical applications, it is difficult to accurately predict and control the pressure change when the fire extinguishing agent flows in the pipeline, which may affect the transportation efficiency and effect of the fire extinguishing agent. Summary of the Invention

[0004] To solve the above technical problems, the present invention proposes a three-stage pipeline structure for fire extinguishing agent transportation at the pack level and a multi-zone experimental platform to solve the problems existing in the above existing technologies.

[0005] To achieve the above object, in the first aspect, the present invention provides a three-stage pipeline structure for fire extinguishing agent transportation at the pack level, including:

[0006] A primary pipeline for connecting a pump room and transporting the fire extinguishing agent into the cabin;

[0007] A secondary pipeline for connecting the cabins respectively and transporting the fire extinguishing agent to each row;

[0008] A tertiary pipeline for connecting each row and transporting the fire extinguishing agent to the pack;

[0009] Wherein, the pressures of the primary pipeline, the secondary pipeline, and the tertiary pipeline decrease layer by layer.

[0010] Preferably, the primary pipeline, the secondary pipeline, and the tertiary pipeline are horizontal transportation structures, vertical transportation structures, or special-shaped structures;

[0011] Wherein, the primary pipeline is an outdoor main pipeline.

[0012] Preferably, pressure sensors are respectively installed at the inlets and outlets of the primary pipeline, the secondary pipeline, and the tertiary pipeline, pressure data is collected through the pressure sensors, and the pressure data is transmitted to a central control unit.

[0013] In a second aspect, the present invention further provides a multi-zone experimental platform for the transportation of fire extinguishing agents at the pack level, comprising:

[0014] The first zone is a straight pipe experimental zone with a DN32 diameter;

[0015] The second zone is a straight pipe experimental zone with a DN20 diameter;

[0016] The third zone is a sudden contraction pipe experimental zone with three pipe diameters;

[0017] The fourth zone is a variable elbow angle experimental zone;

[0018] Among them, the first zone, the second zone, the third zone, and the fourth zone are connected in sequence. An opening position is set between two zones, and a pressure sensor is placed. The local pressure loss is measured through the pressure sensor.

[0019] Preferably, the third zone includes: a straight pipe with a DN32 diameter, a straight pipe with a DN25 diameter, and a straight pipe with a DN20 diameter. There are 6 opening positions in the third zone.

[0020] Preferably, there are 8 opening positions in the fourth zone.

[0021] Preferably, the formula for the friction factor along the straight pipe structure in the first zone is:

[0022]

[0023] Among them, Δp1 is the friction pressure loss, λ1 is the friction factor, L is the length, D is the hydraulic diameter, ρ is the density, and U 2 is the flow velocity;

[0024] The formula for the local resistance factor is:

[0025]

[0026] Among them, Δp2 is the local pressure loss, and λ2 is the local resistance factor.

[0027] Preferably, the first zone, the second zone, the third zone, and the fourth zone all use brackets as the support structure at key positions of the pipeline.

[0028] Preferably, high-speed cameras and orifice flow meters are also provided at the ends of the first zone, the second zone, the third zone, and the fourth zone. The flow pattern changes and the outlet jet conditions during the transportation of the fire extinguishing agent are recorded through the high-speed cameras, and the flow rate data is recorded through the orifice flow meters.

[0029] Compared with the prior art, the present invention has the following advantages and technical effects:

[0030] The present invention provides a three - stage pipeline structure for transporting extinguishing agent at the pack level, including: a first - stage pipeline for connecting to a pump room and transporting the extinguishing agent into a cabin; a second - stage pipeline for connecting to the cabin respectively and transporting the extinguishing agent to each row; a third - stage pipeline for connecting each row and transporting the extinguishing agent to the pack; wherein, the pressures of the first - stage pipeline, the second - stage pipeline, and the third - stage pipeline decrease layer by layer. Through the above - mentioned technical solution, the present invention can avoid the system paralysis problem caused by the fire of the cabin cable system, and at the same time can ensure that the pressure can be normally discharged without damaging the battery pack structure.

[0031] The present invention also provides a multi - partition experimental platform for transporting extinguishing agent at the pack level, including: a first partition, which is a straight - pipe experimental partition with a DN32 pipe diameter; a second partition, which is a straight - pipe experimental partition with a DN20 pipe diameter; a third partition, which is a variable - diameter pipe sudden - contraction experimental partition; a fourth partition, which is a variable - bend - angle experimental partition; wherein, the first partition, the second partition, the third partition, and the fourth partition are connected in sequence, an opening position is set between two partitions and a pressure sensor is placed, and the local pressure loss is measured through the pressure sensor. The present invention measures the friction resistance coefficient and local resistance coefficient of multiple structures through the self - designed multi - partition experimental platform, completes the modeling and guidance of engineering practice, and accurately provides a method for controlling pressure during the transportation of the extinguishing agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0033] Figure 1 is a schematic diagram of the three - stage pipeline of the embodiment of the present invention;

[0034] Figure 2 is a schematic diagram of the multi - partition transportation experimental platform of the embodiment of the present invention;

[0035] Figure 3 is a schematic diagram of the horizontal straight - pipe structure of the first and second partitions of the embodiment of the present invention;

[0036] Figure 4 is a schematic diagram of the variable - diameter pipe structure of the third partition of the embodiment of the present invention;

[0037] Figure 5 is a schematic diagram of the bend - pipe structure of the fourth partition of the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with the embodiments to detail this application.

[0039] It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0040] This embodiment provides a three-stage pipeline structure for transporting the fire extinguishing agent at the pack level, including:

[0041] The first-stage pipeline is used to connect to the pump room and transport the fire extinguishing agent into the cabin;

[0042] The second-stage pipeline is used to connect to the cabins respectively and transport the fire extinguishing agent to each row;

[0043] The third-stage pipeline is used to connect each row and transport the fire extinguishing agent to the pack;

[0044] Among them, the pressures of the first-stage pipeline, the second-stage pipeline, and the third-stage pipeline decrease layer by layer.

[0045] Furthermore, the first-stage pipeline, the second-stage pipeline, and the third-stage pipeline are horizontal transport structures, vertical transport structures, or special-shaped structures;

[0046] Specifically, the special-shaped structures are such as elbow pipes, sudden contraction pipes, valve bodies and other structures.

[0047] Among them, the first-stage pipeline is an outdoor main pipeline.

[0048] As Figure 1 shown, the fire extinguishing agent spraying requires a nozzle. The connection to the nozzle is the place where the nozzle for spraying the fire extinguishing agent is used. The main pipeline is the pipeline outside this pipeline group where the fire extinguishing agent is transported, and it is connected to the outdoor fire extinguishing agent storage warehouse.

[0049] Furthermore, pressure sensors are respectively installed at the inlets and outlets of the first-stage pipeline, the second-stage pipeline, and the third-stage pipeline. Pressure data is collected through the pressure sensors and the pressure data is transmitted to the central control unit.

[0050] Specifically, high-precision pressure sensors are respectively installed at the inlets and outlets of the pipeline. Pressure data is collected every [X] seconds and transmitted to the central control unit through the ZigBee protocol. When the pressure sensor detects that the pipeline pressure exceeds the normal range, the central control unit will automatically adjust the valve opening according to the preset algorithm to restore the normal pressure.

[0051] This embodiment also includes a detailed division of the pipeline module, including the boundary definition, interface standard, and function division of the module. For example, the entire pipeline system is divided into a liquid inlet module, a distribution module, and a liquid outlet module according to functions, and standardized flange interfaces are used to connect between each module, facilitating disassembly and assembly. Through modular design, the flexibility and scalability of the system can be improved. For example, by adding or replacing specific modules, different structural tests of the pipeline system can be easily achieved to adapt to different actual engineering scenarios.

[0052] Beneficial effects of this embodiment:

[0053] In this embodiment, the outdoor main pipe first controls the entry and exit of the fire extinguishing agent into and out of the cabin. One main pipe covers and controls multiple cabins, avoiding the problem of system paralysis caused by the fire of the cabin cable system. Secondly, the pipe diameters of the three-level pipelines decrease layer by layer to ensure that the pressure decreases layer by layer. The first-level pipeline transported from the outdoor main pipe to the cabin is decompressed to the third-level pipeline at the pack level to ensure that the pressure can be normally sprayed without damaging the battery pack structure.

[0054] Embodiment 2

[0055] The three-level pipeline structure in Embodiment 1 includes structures such as sudden contraction pipes, straight pipes, and bent pipes. This embodiment provides a multi-zone experimental platform for transporting the fire extinguishing agent at the pack level. This platform conducts test experiments on these structures, and each zone corresponds to a test structure. The platform specifically includes:

[0056] The first zone is the straight pipe experimental zone with a DN32 pipe diameter;

[0057] The second zone is the straight pipe experimental zone with a DN20 pipe diameter;

[0058] The third zone is the sudden contraction pipe experimental zone with three pipe diameters;

[0059] The fourth zone is the variable bent pipe angle experimental zone;

[0060] Among them, the first zone, the second zone, the third zone, and the fourth zone are connected in sequence. An opening position is set between two zones and a pressure sensor is placed to test the local pressure loss through the pressure sensor.

[0061] Specifically, such as Figure 2As shown in the figure, this platform consists of four partitions in total. The first and second partitions are straight pipe experiment partitions with a diameter of DN32 / DN20 and a length of 2m. The third partition is a variable diameter pipe experiment partition, which includes a DN32 to DN25 sudden contraction pipe and a DN25 to DN20 sudden contraction pipe structure, with a total length of 1.5m. The fourth partition is a variable elbow angle experiment partition, which includes a DN32 equal diameter elbow, a DN32 to DN25 elbow, a DN25 equal diameter elbow, and a DN25 to DN20 elbow structure, consisting of four sections in total, with a length, width, and height of 0.5m respectively.

[0062] Due to the different pipe structures in the four partitions, when designing the experimental platform, it is necessary to set the opening positions to place pressure sensors for testing. Accordingly, the measuring point distribution and calculation method for each partition are introduced as follows:

[0063] As Figure 3 shown, the first and second partitions are straight pipe experimental platforms. To obtain the friction factor along the length, it is necessary to obtain the pressure loss per unit length. Therefore, pressure sensors are set at the head and tail of the pipe in this partition, and the measured data P1 and P2 are obtained. (P1 - P2) / 2 is the pressure loss per unit length, with the unit of Pa / m.

[0064] Furthermore, the formula for the friction pressure loss along the straight pipe structure in the first partition is:

[0065]

[0066] where Δp1 is the friction pressure loss, λ1 is the friction factor, L is the length, D is the hydraulic diameter, ρ is the density, and U 2 is the flow velocity.

[0067] The formula for the local resistance coefficient is:

[0068]

[0069] where Δp2 is the local pressure loss and λ2 is the local resistance coefficient.

[0070] As Figure 4 shown, the third partition is a variable diameter pipe experimental platform. The variable diameter pipe structure includes a straight pipe and a sudden contraction pipe structure, and a total of 6 opening positions are set. Among them, the pressure loss of the DN32 - DN25 local structure can be measured at openings 3 - 2 and 3 - 3, the pressure loss of the DN25 - DN20 local structure can be obtained at openings 3 - 4 and 3 - 5, and the total pressure loss of this experimental partition can be measured from opening 3 - 1 to opening 3 - 6. The straight pipe pressure loss can be calculated from the first and second partitions, and the pressure change law can be given through theoretical calculation and modeling, and compared with the actual experimental values.

[0071] As Figure 5As shown in the figure, the fourth partition is a bent pipe experimental platform, which includes equal-diameter bent pipes, unequal-diameter bent pipes and straight pipe structures. At the same time, the angle of the bent pipe structure is variable, and a total of eight hole positions are set in the whole partition. Among them, the local pressure loss at the bent pipe structure can be obtained respectively from hole 4-2 and hole 4-3, hole 4-4 and hole 4-5, hole 4-6 and hole 4-7. The total pressure loss of the fourth partition can be measured from hole 4-1 to hole 4-8. Similarly, the pressure change law can be given based on the modeling of the first and second partitions and compared with the actual experimental values for calculation.

[0072] Furthermore, the first partition, the second partition, the third partition, and the fourth partition all use brackets as the support structures at the key positions of the pipeline.

[0073] Specifically, for different partitions, brackets are used to play a supporting role. Different pipe material partitions adopt different bracket structures, and the key positions of the pipeline are clearly pointed out. Areas such as elbows, tees, and pipe diameter changes are the key areas for setting the support structure.

[0074] The support structure includes multiple types (such as hanging brackets, brackets, etc.) and multiple materials (such as stainless steel, carbon steel, etc.), and how the support structure reduces the pressure loss caused by pipeline vibration and deformation through mechanical principles. For example, high-strength stainless steel hanging brackets are used. According to the weight and force conditions of the pipeline, the spacing and load-bearing capacity of the hanging brackets are designed according to the principle of mechanical balance to ensure the stability of the pipeline during operation.

[0075] Furthermore, high-speed cameras and orifice flow meters are also set at the ends of the first partition, the second partition, the third partition, and the fourth partition. The high-speed cameras record the flow state changes and outlet spraying conditions during the transportation of the fire extinguishing agent, and the orifice flow meters record the flow data.

[0076] Specifically, this embodiment also sets a high-speed camera system and a flow velocity measurement system. The platform sets high-speed cameras at the ends of each partition to record the flow state changes and outlet spraying conditions during the transportation of the fire extinguishing agent, providing guidance for entering the spraying mode at the pack level. An orifice flow meter of the corresponding caliber is placed at the end to calculate the fluid flow velocity.

[0077] Experimental steps of the multi-partition experimental platform:

[0078] First, the fire extinguishing agent is pressed into the pipeline by a combined pump containing a transformer. The natural direct spraying method is selected. When the fluid passes through the pressure sensor, the data will be uploaded to the central control unit for later calculation and analysis. The calculation method and test position are as above. Finally, when passing through the flow meter, the flow rate is recorded, and the flow velocity value can be calculated through the flow data.

[0079] The high-speed camera system is a separately placed system, parallel to the test platform system. During the experiment, the test platform system (including pressure and flow data measurement) runs in parallel with the high-speed camera system. The high-speed camera system mainly records the experimental effects at the end of the test platform system, serving as the basis for the change in the flow pattern of the fire extinguishing agent.

[0080] In addition, the existing technology also lacks an emergency start function, which means that once the fire protection system in the energy storage container encounters damage to the cables or control system, the entire fire protection system will not be able to work properly, resulting in system paralysis. These problems limit the reliability and effectiveness of the existing technology in emergency situations, especially in fire emergency scenarios that require a quick response.

[0081] To address the above technical problems, in this embodiment, all sub-zones are managed and controlled by the main zone, avoiding problems in the small sub-zones due to accidents.

[0082] Advantages of this embodiment:

[0083] In this embodiment, the friction loss coefficient and local resistance coefficient of multiple structures are measured through a self-designed multi-zone experimental platform, completing the modeling and guidance for engineering practice, and accurately providing the method for controlling pressure during the transportation of the fire extinguishing agent.

[0084] The above is only the preferred specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in this application should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A three-stage pipeline structure for pack-level transportation of fire extinguishing agent, characterized in that: include: Primary pipeline, used to connect to the pump room and transport the fire extinguishing agent into the cabin; Secondary pipelines, used to connect the compartments separately and transport the fire extinguishing agent to each column; The tertiary pipeline is used to connect the various columns and transport the fire extinguishing agent to the pack; Among them, the pressures of the primary pipeline, the secondary pipeline, and the tertiary pipeline decrease layer by layer.

2. The three-stage pipeline structure according to claim 1, characterized in that: The primary pipeline, the secondary pipeline, and the tertiary pipeline are horizontal transport structures, vertical transport structures, or special-shaped structures; Wherein, the primary pipeline is an outdoor main pipe.

3. The three-stage pipeline structure according to claim 1, characterized in that: Pressure sensors are installed at the inlets and outlets of the primary pipeline, the secondary pipeline, and the tertiary pipeline respectively, and pressure data is collected through the pressure sensors and transmitted to the central control unit.

4. A multi-zone experimental platform for pack-level transportation of fire extinguishing agents, characterized in that: include: The first zone is the DN32 diameter straight pipe test zone; The second zone is the DN20 diameter straight pipe test zone; The third zone is the zone for the three-diameter sudden shrinkage tube experiment; The fourth zone is the zone for variable bending angle experiments; The first partition, the second partition, the third partition, and the fourth partition are connected in sequence, an opening position is set between the two partitions and a pressure sensor is placed therein, and the local pressure loss is tested by the pressure sensor.

5. The multi-partition experimental platform according to claim 4, characterized in that: The third partition includes: a straight pipe with a diameter of DN32, a straight pipe with a diameter of DN25, and a straight pipe with a diameter of DN20. The third partition is provided with 6 opening positions.

6. The multi-partition experimental platform according to claim 4, characterized in that: The fourth partition includes: a straight pipe with a diameter of DN32, a straight pipe with a diameter of DN25, and a straight pipe with a diameter of DN20. The fourth partition is provided with 8 opening positions.

7. The multi-partition experimental platform according to claim 4, characterized in that: The pressure loss formula along the straight pipe structure of the first partition is: Among them, Δp1 is the pressure loss along the way, λ1 is the resistance coefficient along the way, L is the length, D is the hydraulic diameter, ρ is the density, and U 2 is the flow rate; The formula for the local drag coefficient is: Among them, Δp2 is the local pressure loss and λ2 is the local resistance coefficient.

8. The multi-partition experimental platform according to claim 4, characterized in that: The first partition, the second partition, the third partition, and the fourth partition all use brackets as supporting structures at key positions of pipelines.

9. The multi-partition experimental platform according to claim 4, characterized in that: High-speed cameras and caliber flow meters are also provided at the ends of the first partition, the second partition, the third partition, and the fourth partition. The high-speed cameras are used to record the flow state changes and outlet injection conditions during the transportation of the fire extinguishing agent, and the caliber flow meters are used to record the flow data.

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