An open-top adjustable full-enclosure sound barrier ventilation and smoke exhaust experimental device

Abstract

The utility model discloses a kind of top opening adjustable full-closed sound barrier ventilation and smoke exhaust experimental devices, belong to full-closed sound barrier technical field, including a plurality of sequentially connected full-closed sound barrier units, full-closed sound barrier unit includes recessed steel frame, the top surface of recessed steel frame is equipped with opening and closing mechanism, opening and closing mechanism includes the top plate of symmetrical setting at recessed steel frame top, opening is equipped between two top plates, one side of recessed steel frame is equipped with fireproof glass, the side of recessed steel frame away from fireproof glass and the inside of recessed steel frame are respectively equipped with gypsum board, sound barrier simulation passage is formed between fireproof glass and gypsum board, the top of gypsum board located in recessed steel frame is equipped with conveying belt, gas burner is equipped on conveying belt, gas burner is connected with gas storage mechanism.The utility model structure is simple, easy to assemble and disassemble, can be carried out full-closed sound barrier top continuity smoke exhaust opening size adjustment, experiment can be strong repeatability, and experiment accuracy is high.

Description

Technical Field

[0001] This utility model belongs to the field of fully enclosed sound barrier technology, and in particular relates to a fully enclosed sound barrier ventilation and smoke exhaust experimental device with an adjustable top opening. Background Technology

[0002] To meet the demands of urban transportation network upgrades and improve the living environment of residents along the routes, fully enclosed sound barriers are being constructed on urban roads as a key infrastructure for controlling traffic noise pollution and ensuring livability. These barriers are being built in large numbers alongside urban expressways, main roads, and bridges spanning rivers and seas. They are not only important indicators of improved urban transportation functions but also powerful evidence of the construction of ecologically livable cities. However, the continuous expansion of sound barrier construction, while significantly reducing traffic noise interference and improving the quality of the urban environment, has also brought new challenges to ventilation and smoke extraction within the fully enclosed sound barriers. Because the narrow, elongated structure of fully enclosed sound barriers cannot utilize mechanical ventilation to deliver fresh air, in the event of a fire, smoke and other harmful gases cannot be promptly discharged outside the sound barrier. This leads to excessive accumulation of smoke and other harmful gases inside the fully enclosed sound barrier, potentially causing road congestion, casualties, and property damage.

[0003] To address sudden fires within fully enclosed sound barriers along highways and ensure personnel safety and the structural integrity of the barriers, continuous openings at the top of the barriers, fitted with sound-absorbing louvers, are typically used to connect them to the outside environment, allowing for the exchange of polluted air inside the barrier with ambient air. This natural smoke extraction method is suitable for small to medium-sized fires and is a common, low-cost ventilation and smoke extraction method.

[0004] Experimental research is an important means of observing and exploring the flow of smoke in tunnels. However, due to the disadvantages of full-scale tunnel fire experiments, such as low economic efficiency and poor controllability, there is an urgent need for an experimental device that can simulate the flow of smoke in a fully enclosed sound barrier fire, with adjustable top opening size and adjustable fire source location to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a fully enclosed sound barrier ventilation and smoke extraction experimental device with an adjustable top opening, in order to solve the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a fully enclosed sound barrier ventilation and smoke exhaust experimental device with an adjustable top opening, comprising multiple fully enclosed sound barrier units connected in sequence. Each fully enclosed sound barrier unit includes a grooved steel frame, the top surface of which is provided with an opening and closing mechanism. The opening and closing mechanism includes top plates symmetrically arranged on the top of the grooved steel frame, with an opening between the two top plates. One side of the grooved steel frame is provided with fireproof glass, and the side of the grooved steel frame away from the fireproof glass and the inside of the grooved steel frame are respectively provided with gypsum board. A sound barrier simulation channel is formed between the fireproof glass and the gypsum board. A conveyor belt is provided on the top of the gypsum board located inside the grooved steel frame, and a gas burner is provided on the conveyor belt. The gas burner is connected to a gas storage mechanism, and a monitoring mechanism is provided inside the grooved steel frame.

[0007] Optionally, the top surface of the grooved steel frame is provided with roller moving grooves on both sides, and rubber rollers are symmetrically installed on both sides of the top plate, with the rubber rollers located in the roller moving grooves.

[0008] Optionally, multiple triangular fixing brackets are symmetrically provided on the outer side of the groove-shaped steel frame, and the triangular fixing brackets are connected to the groove-shaped steel frame by bolts.

[0009] Optionally, the top two sides of the grooved steel frame are respectively fitted with closed side edges by fixing screws, and the closed side edges are located outside the roller moving groove.

[0010] Optionally, the outer side of the roller moving groove is provided with scale lines, which are arranged longitudinally along the roller moving groove.

[0011] Optionally, the conveyor belt is electrically connected to a conveyor motor, which is located inside the gypsum board.

[0012] Optionally, the gas storage mechanism includes a propane combustion cylinder, the outlet of which is connected to a gas delivery pipe via a pressure reducing valve, one end of which passes through the gypsum board and is connected to the gas inlet of the gas burner.

[0013] Optionally, a mass flow meter is connected to one end of the gas delivery pipe located on the outside of the gypsum board.

[0014] Optionally, the monitoring mechanism includes a flue gas tracer laser installed on the side of the grooved steel frame, and multiple transverse thermocouple temperature measuring points are evenly spaced at the top of the sound barrier simulation channel. The transverse thermocouple temperature measuring points are located below the top plate. The sound barrier simulation channel has multiple thermocouple temperature measuring point trees. The transverse thermocouple temperature measuring points and the thermocouple temperature measuring point trees are electrically connected to an external data acquisition instrument.

[0015] Optionally, the installation height of the flue gas tracer laser is 1 / 3 of the height of the simulated sound barrier channel.

[0016] This invention discloses the following technical advantages: The opening width is adjusted using two top plates at the top of the simulated sound barrier passage. Adjusting the opening width allows for natural ventilation and smoke extraction within the simulated passage. Simultaneously, the position of the gas burner can be adjusted via a conveyor belt. This design, while controlling the top opening width, also addresses the impact of different fire sources within the simulated sound barrier passage on the experiment. This invention has a simple structure, is easy to assemble and disassemble, allows for continuous adjustment of the smoke extraction opening size at the top of a fully enclosed sound barrier, and provides high experimental repeatability and accuracy. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of the fully enclosed sound barrier unit of this utility model;

[0019] Figure 2 This is a top view of the fully enclosed sound barrier unit of this utility model;

[0020] Figure 3 This is a schematic diagram of the overall structure of the fully enclosed sound barrier of this utility model;

[0021] Figure 4 This is a side view of the overall structure of the fully enclosed sound barrier of this utility model;

[0022] Figure 5 This is a schematic diagram of the adjustable fire source position structure of the fully enclosed sound barrier of this utility model.

[0023] Figure 6 This is a schematic diagram showing the spread of flue gas along a continuous top opening.

[0024] In the diagram: 1. Top plate; 2. Opening; 3. Rubber roller; 4. Enclosed side edge; 5. Fixing screw; 6. Grooved steel frame; 7. Gypsum board; 8. Triangular fixing frame; 9. Fireproof glass; 10. Conveyor belt; 11. Scale line; 12. Roller moving groove; 13. Flue gas tracer laser; 14. Lateral thermocouple temperature measuring point; 15. Thermocouple temperature measuring point tree; 16. Gas burner; 17. Mass flow meter; 18. Propane fuel cylinder; 19. Conveyor belt motor; 20. Gas delivery pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Reference Figures 1 to 6 As shown, this embodiment provides a fully enclosed sound barrier ventilation and smoke exhaust experimental device with an adjustable top opening, including multiple fully enclosed sound barrier units connected in sequence. Each fully enclosed sound barrier unit includes a grooved steel frame 6. The top surface of the grooved steel frame 6 is provided with an opening and closing mechanism. The opening and closing mechanism includes top plates 1 symmetrically arranged on the top of the grooved steel frame 6. An opening 2 is provided between the two top plates 1. A fireproof glass 9 is provided on one side of the grooved steel frame 6. A gypsum board 7 is provided on the side of the grooved steel frame 6 away from the fireproof glass 9 and inside the grooved steel frame 6, respectively. A sound barrier simulation channel is formed between the fireproof glass 9 and the gypsum board 7. A conveyor belt 10 is provided on the top of the gypsum board 7 located inside the grooved steel frame 6. A gas burner 16 is provided on the conveyor belt 10. The gas burner 16 is connected to a gas storage mechanism. A monitoring mechanism is provided inside the grooved steel frame 6.

[0028] The width of the opening 2 is adjusted by using two top plates 1 at the top of the simulated sound barrier passage. Adjusting the width of the opening 2 allows for natural ventilation and smoke extraction within the simulated passage. Simultaneously, the position of the gas burner 16 can be adjusted via a conveyor belt 10. This design not only controls the width of the top opening 2 but also addresses the impact of different fire sources within the simulated passage on the experiment. This invention features a simple structure, is easy to assemble and disassemble, allows for continuous adjustment of the size of the smoke extraction opening 2 at the top of a fully enclosed sound barrier, and provides high experimental repeatability and accuracy.

[0029] To further optimize the design, roller movement grooves 12 are provided on both sides of the top surface of the grooved steel frame 6, and rubber rollers 3 are symmetrically installed on both sides of the top plate 1. The rubber rollers 3 are located in the roller movement grooves 12.

[0030] Rubber rollers 3 are embedded on both sides of each top plate 1 to allow for arbitrary lateral sliding. Each unit has two top plates 1 symmetrically distributed on the top of the grooved steel frame 6.

[0031] The roller moving groove 12 is integrally formed with the top of the grooved steel frame 6, extending longitudinally to both sides of the top of the grooved steel frame, parallel to the frame axis. It limits the sliding direction of the top plate 1, ensuring that the adjustment of the opening 2 is carried out in a straight longitudinal direction.

[0032] The design is further optimized by providing multiple triangular fixing brackets 8 symmetrically arranged on the outer side of the grooved steel frame 6, and the triangular fixing brackets 8 are connected to the grooved steel frame 6 by bolts.

[0033] To further optimize the design, closed side edges 4 are installed on both sides of the top of the grooved steel frame 6 by fixing screws 5. The closed side edges 4 are located on the outside of the roller moving groove 12.

[0034] The grooved steel frame 6 and the triangular fixing frame 8 are connected by bolts, and the grooved steel frame 6 and the closed side edge 4 are longitudinally spliced ​​by fixing screws 5. Roller movement grooves 12 are reserved on both sides of the top of the grooved steel frame 6, and the roller movement grooves 12 are compatible with rubber rollers 3. This "skeleton" of the device extends laterally (multiple units can be spliced ​​together) to support all components. The high-strength steel material can withstand the high temperatures of the experiment to prevent frame deformation; the multi-unit splicing design uses fixing screws 5 to connect the units, which can simulate fully enclosed sound barriers of different lengths.

[0035] The top of the triangular fixing frame 8 is bolted to the bottom of the grooved steel frame 6, with one set installed every 2m, symmetrically distributed on both sides of the bottom of the grooved steel frame 6. The triangular structure utilizes mechanical stability to prevent the device from tilting due to internal high temperature or component weight.

[0036] The inner side of the enclosed side 4 is locked to the side of the grooved steel frame 6 by fixing screws 5; the outer side is fitted with fireproof glass 9 which extends longitudinally along the grooved steel frame 6, with a height consistent with the sound barrier simulation passage. The fireproof steel material blocks the leakage of smoke from the side, ensuring the airtightness of the experimental environment (gap ratio ≤0.5%), while also providing an installation base for the fireproof glass 9, taking into account both observation and safety.

[0037] The fire-resistant glass 9 is housed in a recessed slot within the steel frame 6, with the edges sealed with high-temperature resistant sealing tape. Each fully enclosed sound barrier unit can utilize 1-2 pieces of fire-resistant glass 9. The sides are made of transparent high-temperature resistant fire-resistant glass 9 for easy and direct observation of the internal fire source combustion and smoke flow.

[0038] To further optimize the design, a scale line 11 is provided on the outer side of the roller moving groove 12, and the scale line 11 is set longitudinally along the roller moving groove 12.

[0039] The width of opening 2 can be infinitely adjusted according to scale line 11 (the size covers the commonly used smoke exhaust port size of actual sound barriers), and the continuous opening 2 effectively simulates the smoke exhaust channel at the top of a real sound barrier.

[0040] The scale lines 11 are laser-engraved on the outside of the roller moving groove 12, with one line every 1 cm distributed longitudinally along the roller moving groove 12. This ensures accurate adjustment of the opening 2 width, facilitates intuitive reading of the adjustment values, and allows for comparative experiments with different opening 2 sizes.

[0041] In a further optimized design, the conveyor belt 10 is electrically connected to a conveyor motor 19, which is located within the gypsum board 7.

[0042] A low-power electric conveyor belt 10 is installed in the middle of the fully enclosed sound barrier unit and connected to the conveyor belt motor 19. The width of the conveyor belt 10 is adapted to the gas burner 16, and its surface is coated with a fire-retardant coating. The electric drive enables the gas burner 16 to move laterally at a uniform speed, and the speed is adjustable.

[0043] The conveyor motor 19 is embedded inside the high-temperature resistant gypsum board 7 on the side. The wires pass through the gypsum board 7 and are connected to the external power source. The forward and reverse functions of the conveyor motor 19 enable the gas burner 16 to move bidirectionally, covering the entire transverse range of the channel.

[0044] The bottom of the gas burner 16 is fixed on the conveyor belt 10; the top air inlet is connected to the gas delivery pipe 20. The gas burner 16 is placed in the center of the conveyor belt 10 and can move laterally to simulate the fire source when a fire occurs in a fully enclosed sound barrier.

[0045] The scheme is further optimized. The gas storage mechanism includes a propane combustion cylinder. The outlet of the propane combustion cylinder is connected to a gas delivery pipe 20 through a pressure reducing valve. One end of the gas delivery pipe 20 passes through the gypsum board 7 and is connected to the gas inlet of the gas burner 16.

[0046] The outlet of propane fuel cylinder 18 is connected to gas delivery pipe 20 via a pressure reducing valve. It is placed 3-4 meters outside the apparatus to prevent high temperatures from affecting the high-pressure storage of propane (purity ≥99.5%), ensuring stable combustion of the ignition source; the external design reduces experimental safety risks and facilitates fuel replenishment.

[0047] In a further optimized design, the gas delivery pipe 20 is connected to a mass flow meter 17 at one end located outside the gypsum board 7.

[0048] One end of the gas delivery pipe 20 is connected to the mass flow meter 17, and the other end passes through the high-temperature resistant gypsum board 7 and connects to the gas burner 16. The gas delivery pipe 20 is laid along the outside of the device, and the point where it passes through the gypsum board 7 is sealed with sealing tape. The mass flow meter 17 is placed on the outside of the device near the propane fuel cylinder 18 to accurately control the propane flow rate (accuracy ±0.1L / min), thereby controlling the magnitude and stability of the ignition source power; it can display the flow rate value in real time, facilitating experimental data recording.

[0049] The scheme has been further optimized. The monitoring mechanism includes a flue gas tracer laser 13 installed on the side of the grooved steel frame 6. Multiple transverse thermocouple temperature measuring points 14 are evenly spaced at the top of the sound barrier simulation channel. The transverse thermocouple temperature measuring points 14 are located below the top plate 1. Multiple thermocouple temperature measuring point trees 15 are installed in the sound barrier simulation channel. The transverse thermocouple temperature measuring points 14 and the thermocouple temperature measuring point trees 15 are electrically connected to external data acquisition instruments.

[0050] The design was further optimized so that the installation height of the flue gas tracer laser 13 was 1 / 3 of the height of the simulated sound barrier channel.

[0051] The flue gas tracer laser 13 is fixed to the side of the grooved steel frame 6 at a height of 1 / 3 of the channel height, ensuring that the laser beam passes laterally through the channel. The laser beam illuminates the flue gas particles, and the flow trajectory and spread pattern of the flue gas can be observed and captured in real time through the fireproof glass 9 on the side.

[0052] The transverse thermocouple temperature measuring points 14 are set at a position 0.2m from the bottom of the top plate 1. Each measuring point is connected to an external data acquisition instrument via a wire. The measuring point head is a K-type thermocouple. They are arranged longitudinally along the inner side of the top plate 1, with one measuring point every 0.1m. The transverse thermocouple temperature measuring points 14 are used to measure the longitudinal temperature distribution of the flue gas generated during combustion of the gas burner 16 and the temperature distribution of the ceiling. Finally, the data acquisition instrument outputs the final collected temperature values.

[0053] Thermocouple temperature measurement point tree 15 contains 4-6 K-type thermocouples per group, vertically fixed by a bracket; the wires are connected to a data acquisition instrument vertically installed in the longitudinal direction of the gas burner 16, with each measurement point spaced 0.5m apart. Thermocouple temperature measurement point tree 15 is used to measure the temperature distribution of the flue gas layer during the spread of flue gas generated during combustion in the gas burner 16, and finally outputs the collected temperature values ​​through the data acquisition instrument.

[0054] Working principle:

[0055] Device assembly:

[0056] Assemble the grooved steel frame 6 according to the experimental requirements (e.g., assemble 5 units to form a 10m long passage), install the closed side edge 4 with fixing screws 5, embed the fireproof glass 9 and seal the edge;

[0057] Install a triangular fixing bracket 8 at the bottom of the grooved steel frame 6 to ensure that the device is placed horizontally (calibrated by a level).

[0058] A low-power electric conveyor belt 10 is laid horizontally, connected to a conveyor motor 19, and connected to a gas burner 16 and a propane fuel cylinder 18 (with a gas delivery pipe 20 and a mass flow meter 17 connected in series in between). A flue gas tracer laser instrument 13 and thermocouple measuring points are installed, and a data acquisition instrument is connected.

[0059] Top opening 2 width adjustment:

[0060] Push the top plate 1 so that the rubber roller 3 at its bottom slides along the roller moving groove 12. With reference to the scale line 11 on the outside of the roller moving groove 12, set the width of the continuously adjustable top opening 2 to the target value.

[0061] Tighten the fixing screws 5 on the top of the top plate 1 to lock the width of the opening 2 and prevent the top plate 1 from shifting during the experiment.

[0062] Adjusting the location of the fire source:

[0063] Start the conveyor belt motor 19 to drive the low-power electric conveyor belt 10 to rotate, which in turn drives the gas burner 16 to move laterally.

[0064] Using the scale lines 11 on both sides of the conveyor belt 10 as a reference, position the burner to the target position (e.g., "3m from the left side wall" to simulate a fire source in the middle lane), turn off the motor, and lock the belt position.

[0065] Fire source start-up and power stabilization:

[0066] Open the pressure reducing valve of propane fuel cylinder 18, set the propane flow rate through mass flow meter 17 (e.g., 15L / min, corresponding to 100kW fire source power), and ignite gas burner 16 after the flow rate stabilizes.

[0067] Observe the burning status of the fire source inside the fireproof glass 9 to ensure that the flame does not flicker (if it flickers, check whether the gas burner 16 clamp is securely fixed).

[0068] Flue gas generation and exhaust process:

[0069] The high-temperature flue gas generated by the combustion of the fire source rises under the action of buoyancy. Due to the closed side edge 4 preventing the flue gas from leaking, the flue gas can only spread upwards continuously at the adjustable top opening 2 and longitudinally.

[0070] After the flue gas comes into contact with the top plate 1, it is discharged outward along the continuous adjustable top opening 2 (e.g. Figure 6 As shown in the figure, during the process, the laser beam of the flue gas tracer laser 13 illuminates the flue gas particles and captures the flue gas trajectory in real time;

[0071] To simulate the smoke extraction effect of different opening widths 2, the fire source can be turned off, the fixing screws 5 can be loosened, the position of the top plate 1 can be readjusted, and the above fire simulation steps can be repeated.

[0072] Temperature data acquisition:

[0073] The horizontal thermocouple temperature measuring point 14 collects temperature values ​​at different times in real time, records flue gas temperature, analyzes the temperature decay law and flue gas efficiency during the flue gas exhaust process; the thermocouple temperature measuring point tree 15 collects vertical temperature distribution, analyzes the flue gas layer height law during the flue gas exhaust process.

[0074] Location of fire source:

[0075] Keeping the width of the top opening 2 fixed and the power of the fire source constant, the gas burner 16 is moved to different lateral positions (such as 2m on the left, center, and 2m on the right) by the conveyor belt motor 19. The fire simulation and data acquisition are repeated to analyze the influence of the fire source position on the smoke exhaust trajectory.

[0076] Multi-parameter combination experiment:

[0077] By adjusting the combination parameters such as "opening width (5 / 10 / 15 / 20cm) + fire source power (50 / 100 / 150kW) + fire source location", multiple sets of comparative experiments were conducted to finally establish the correspondence between "parameters and smoke exhaust effect".

[0078] Through the above process, the device can accurately simulate the fire smoke exhaust scenario of a fully enclosed sound barrier. Furthermore, through the modular design and adjustable function of the structural components, it achieves high repeatability (experimental error of the same parameter ≤5%) and high accuracy of the experiment, providing data support for the design of smoke exhaust outlets of actual sound barriers.

[0079] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0080] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A fully enclosed sound barrier ventilation and smoke extraction experimental device with an adjustable top opening, characterized in that: The system comprises multiple fully enclosed sound barrier units connected in sequence. Each fully enclosed sound barrier unit includes a grooved steel frame (6). The top surface of the grooved steel frame (6) is provided with an opening and closing mechanism. The opening and closing mechanism includes top plates (1) symmetrically arranged on the top of the grooved steel frame (6). An opening (2) is provided between the two top plates (1). Fireproof glass (9) is provided on one side of the grooved steel frame (6). Plasterboard (7) is provided on the side of the grooved steel frame (6) away from the fireproof glass (9) and inside the grooved steel frame (6). A sound barrier simulation channel is formed between the fireproof glass (9) and the plasterboard (7). A conveyor belt (10) is provided on the top of the plasterboard (7) located inside the grooved steel frame (6). A gas burner (16) is provided on the conveyor belt (10). The gas burner (16) is connected to a gas storage mechanism. A monitoring mechanism is provided inside the grooved steel frame (6).

2. The fully enclosed sound barrier ventilation and smoke extraction experimental device with adjustable top opening as described in claim 1, characterized in that: The top surface of the grooved steel frame (6) is provided with roller moving grooves (12) on both sides, and rubber rollers (3) are symmetrically installed on both sides of the top plate (1). The rubber rollers (3) are located in the roller moving grooves (12).

3. The fully enclosed sound barrier ventilation and smoke extraction experimental device with adjustable top opening as described in claim 1, characterized in that: The grooved steel frame (6) is symmetrically provided with multiple triangular fixing frames (8) on its outer side, and the triangular fixing frames (8) are connected to the grooved steel frame (6) by bolts.

4. The experimental device for ventilation and smoke extraction of a fully enclosed sound barrier with an adjustable top opening as described in claim 2, characterized in that: The top two sides of the grooved steel frame (6) are respectively equipped with closed side edges (4) by fixing screws (5), and the closed side edges (4) are located outside the roller moving groove (12).

5. The fully enclosed sound barrier ventilation and smoke extraction experimental device with adjustable top opening as described in claim 2, characterized in that: The outer side of the roller moving groove (12) is provided with a scale line (11), which is arranged longitudinally along the roller moving groove (12).

6. The experimental device for ventilation and smoke extraction of a fully enclosed sound barrier with an adjustable top opening as described in claim 1, characterized in that: The conveyor belt (10) is electrically connected to a conveyor motor (19), which is located inside the gypsum board (7).

7. The experimental device for ventilation and smoke extraction of a fully enclosed sound barrier with an adjustable top opening as described in claim 1, characterized in that: The gas storage mechanism includes a propane combustion bottle, the outlet of which is connected to a gas delivery pipe (20) via a pressure reducing valve. One end of the gas delivery pipe (20) passes through the gypsum board (7) and is connected to the gas inlet of the gas burner (16).

8. The experimental device for ventilation and smoke extraction of a fully enclosed sound barrier with an adjustable top opening as described in claim 7, characterized in that: The gas delivery pipe (20) is connected to a mass flow meter (17) at one end located outside the gypsum board (7).

9. The experimental device for ventilation and smoke extraction of a fully enclosed sound barrier with an adjustable top opening as described in claim 1, characterized in that: The monitoring mechanism includes a flue gas tracer laser (13) installed on the side of the grooved steel frame (6). Multiple transverse thermocouple temperature measuring points (14) are evenly spaced at the top of the sound barrier simulation channel. The transverse thermocouple temperature measuring points (14) are located below the top plate (1). Multiple thermocouple temperature measuring point trees (15) are provided in the sound barrier simulation channel. The transverse thermocouple temperature measuring points (14) and the thermocouple temperature measuring point trees (15) are electrically connected to an external data acquisition instrument.

10. The experimental device for ventilation and smoke extraction of a fully enclosed sound barrier with an adjustable top opening as described in claim 9, characterized in that: The installation height of the flue gas tracer laser (13) is 1 / 3 of the height of the simulated passage of the sound barrier.

Images