Oil pool fire device with controllable heat release rate and control method

Abstract

The invention discloses an oil pool fire device with a controllable heat release rate and a control method, and relates to the technical field of oil pool fire experiment control, the oil pool fire device comprises a cover plate covering an oil pool, a driving assembly driving the cover plate to move, a guide rail assembly supporting the cover plate to move, and a control assembly controlling the driving assembly to operate; the opening area of the oil pool is adjusted by moving the cover plate, so that combustion heat released by fire in the oil pool is controlled, and the heat release rate of the fire in the oil pool is controlled by controlling the moving speed of the cover plate. According to the invention, the open area of the oil pool is adjusted through the movable cover plate, and closed-loop feedback control is combined, so that random setting and real-time dynamic adjustment of the heat release rate are realized, and high-precision heat release rate control is realized. According to the moving speed calculation formula, the fuel attribute parameters are associated with the moving speed of the cover plate, different fuel types can be adapted by adjusting the fuel attribute parameters in the formula, and flexible adjustment is carried out through a parameterized control formula and a feedback mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of oil pool fire experimental control, in particular to an oil pool fire device with controllable heat release rate and a control method. Background Art

[0002] In the field of fire science and safety engineering, oil pool fire is an important experimental method for studying fire characteristics and evaluating combustion hazards. It has the advantages of stable flames and easy observation of combustion phenomena, and is therefore widely used in combustion mechanism research, fire extinguishing technology development and safety assessment. However, traditional oil pool fire experiments usually rely on fixed geometric dimensions, fuel types and natural combustion conditions. The heat release rate often shows a relatively fixed or slowly changing law in time and intensity, which is difficult to meet the needs of complex fire processes or multi-scenario evolution simulation. With the continuous development of refined fire simulation, complex building fire protection design and new fire extinguishing technology, researchers and engineers are in urgent need of an experimental platform that can regulate or accurately reproduce the heat release rate curve on demand under laboratory conditions to simulate multi-stage and different time sequence combustion scenarios in real fires. Based on this background, how to use the simple and easy-to-operate experimental carrier of oil pool fire to achieve arbitrary setting and controllable changes of heat release rate has become an important topic in current fire science research and practical technology development. Summary of the invention

[0003] In order to overcome the above-mentioned defects in the prior art, the present invention provides an oil pool fire device with controllable heat release rate, which can realize arbitrary setting and controllable adjustment of the heat release rate of the oil pool fire.

[0004] To achieve the above object, the present invention adopts the following technical solutions, including: An oil pool fire device with controllable heat release rate, comprising: Oil sump for holding fuel; At least one movable cover plate assembly; the cover plate assembly includes a cover plate covering the oil pool, and the open area of ​​the oil pool is adjusted by moving the cover plate to control the combustion heat released by the oil pool fire; A driving assembly for driving the cover plate to move; A guide rail assembly for supporting the movement of the cover plate; The control component is used to control the operation of the driving component, and the movement speed of the cover plate is controlled by the driving component, thereby controlling the heat release rate of the oil pool fire.

[0005] Preferably, the cover plate assembly includes a cover plate, a cover plate bracket and a slider; the guide rail assembly includes a guide rail; One side of the cover plate is mounted on the cover plate bracket, and the other side of the cover plate covers the oil pool; a slider is provided under the cover plate bracket; the slider is slidably connected to the guide rail; The driving assembly drives the cover plate bracket and the cover plate to move along the horizontal plane direction of the oil pool.

[0006] Preferably, the driving assembly includes a screw rod, a nut sleeved on the screw rod, and a motor driving the screw rod to rotate; The cover plate bracket is connected with the nut, and the rotation of the screw rod drives the nut to move along the direction of the screw rod, thereby driving the cover plate bracket and the cover plate to move along the horizontal plane direction of the oil pool.

[0007] Preferably, a travel switch is provided on the guide rail, and when the slider touches the travel switch, the driving component stops driving.

[0008] Preferably, the oil pool is a square oil pool, and the cover plate moves along the length direction of the oil pool; a sealing structure is provided below the cover plate, and a concave groove is provided below the sealing structure along the length direction of the oil pool, and the concave groove is embedded with the edge of the oil pool along the length direction.

[0009] Preferably, the control component includes a driver, a controller and a power supply; the controller is used to send control instructions to the driver according to a set heat release rate curve; the driver is used to control the operation of the drive component according to the control instructions, thereby controlling the movement speed of the cover; the power supply is used to supply power to the drive component.

[0010] Preferably, the controller is also connected to an external calorimeter for communication, and calculates a measured value of the heat release rate based on the heat measured in real time by the calorimeter; compares the measured value of the heat release rate with a set value in a heat release rate curve; if the measured value of the heat release rate is less than the set value and the error between the two exceeds a set range, the operation of the drive assembly is accelerated and the moving speed of the cover is increased; if the measured value of the heat release rate is greater than the set value and the error between the two exceeds a set range, the operation of the drive assembly is decelerated and the moving speed of the cover is reduced; so that the error between the measured value of the heat release rate and the set value remains within a set range.

[0011] Preferably, the oil pool is a square oil pool, and cover plates, drive plates and guide rail plates with the same structure are arranged on both sides of the oil pool; the two cover plates located on both sides of the oil pool move along the length direction of the oil pool, and are used to close the oil pool when moving towards each other, and are used to open the oil pool when moving in the opposite direction.

[0012] The present invention also provides a control method for an oil pool fire device with controllable heat release rate, which is applied to the above-mentioned oil pool fire device with controllable heat release rate. The control method is as follows: In the initial state, the two cover plates are closed so that the oil pool is in a sealed state, and the closed position of the two cover plates is located on the center line of the oil pool perpendicular to the length direction; During the experiment, the control component is set according to the heat release rate curve Q m(t), synchronously control the operation of the drive components on both sides of the oil pool, drive the two cover plates to move in opposite directions to both sides of the oil pool at the same moving speed v, so that the oil pool fire follows the set heat release rate curve Q m (t) Releases the combustion heat, and the calculation formula of the moving speed v is as follows: ; Where m is the burning rate per unit area; k and β are fuel property parameters; d is the width of the oil pool; v is the moving speed of the cover; t is the moving time of the cover; ΔH c The heat of combustion of the fuel; is the combustion efficiency; Q m (t) is the heat release rate setting value at time t in the heat release rate curve.

[0013] Preferably, during the experiment, the control component receives the measurement signal of the calorimeter in real time, calculates the measured value of the heat release rate in real time according to the heat measured by the calorimeter, compares the measured value of the heat release rate with the set value in the heat release rate curve, and calculates the error ε between the two: ; In the formula, Q(t) is the measured value of heat release rate at time t; If the measured value of the heat release rate is less than the set value and the error ε between the two exceeds the set range, the operation of the drive component is accelerated to increase the moving speed of the cover; if the measured value of the heat release rate is greater than the set value and the error between the two exceeds the set range, the operation of the drive component is decelerated to reduce the moving speed of the cover; thereby, the error between the measured value and the set value of the heat release rate is kept within the set range.

[0014] The advantages of the present invention are: (1) The present invention adjusts the open area of ​​the oil pool by a movable cover plate and combines closed-loop feedback control to achieve arbitrary setting and real-time dynamic adjustment of the heat release rate, thereby achieving high-precision heat release rate control.

[0015] (2) The movement speed calculation formula of the present invention relates the fuel property parameters to the cover plate movement speed, and accurately calculates the control parameters through a theoretical model. By adjusting the fuel property parameters in the formula, it can adapt to different fuel types and make flexible adjustments through parameterized control formulas and feedback mechanisms.

[0016] (3) The controller of the present invention receives real-time data from the calorimeter, compares the set value of the heat release rate with the measured value, dynamically adjusts the moving speed of the cover plate, controls the error within the set range, and significantly improves the control accuracy. The automated and programmable control method reduces human errors and improves experimental repeatability.

[0017] (4) The present invention controls the two cover plates located on both sides of the oil pool to move synchronously in opposite directions to avoid unilateral air flow disturbance and ensure the symmetry and stability of the combustion area change.

[0018] (5) The control assembly of the present invention integrates a driver, a controller and a displacement sensor, and supports a preset heat release rate curve (such as step, linear or exponential change). The controller (PLC) automatically executes complex combustion curves through a program, reducing errors caused by human intervention.

[0019] (6) The oil pool fire device of the present invention has a stable structure and high safety. High-precision displacement control is provided by means of screw rod and nut drive to avoid cover plate deviation; the travel switch limits the movement range to prevent mechanical overload. The concave groove design of the sealing structure effectively isolates the escape of fuel vapor and oil pool fire, reducing environmental pollution and fire risks.

[0020] (7) The present invention reduces experimental risks and environmental pollution through closed control and automated operation.

[0021] (8) The present invention solves the pain points of the traditional oil pool fire device, such as rough heat release rate control, reliance on manual adjustment, and poor repeatability, through the triple innovation of precise mechanical design, intelligent control algorithm, and real-time feedback correction, and provides a high-precision experimental platform for fire dynamics research and flame retardant material testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the oil pool fire device of the present invention.

[0023] Figure 2 Schematic diagram of the oil pool.

[0024] Figure 3 A schematic diagram of a single-sided cover assembly.

[0025] Figure 4 Schematic diagram of the nut.

[0026] Figure 5 Schematic diagram of the sealing structure at the contact position between the cover plate and the oil pool.

[0027] Figure 6 This is a schematic diagram of the motor assembly and guide rail assembly on one side.

[0028] Figure 7 A graph showing rapid fire achieved for heptane combustion.

[0029] Figure 8 A graph showing the medium-speed fire achieved for heptane combustion.

[0030] Fig. 9 A graph showing rapid fire for diesel combustion.

[0031] Fig.10 A graph showing the medium speed fire achieved for diesel combustion.

[0032] Description of reference numerals: 1-oil pool, 2-cover assembly, 21-cover, 22-cover bracket, 23-pad, 24-slider, 25-sealing structure, 26-L-type mounting plate, 3-drive assembly, 31-screw, 32-nut, 33-motor, 34-coupling, 4-guide rail assembly, 41-guide rail, 42-guide rail bracket, 43-travel switch, 44-leveling base, 51-displacement sensor, 52-power cord, 53-control cabinet. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1 Depend on Figure 1-Figure 6 As shown, the present invention provides an oil pool fire device with controllable heat release rate, comprising: An oil tank 1 for holding fuel; At least one movable cover assembly 2; the cover assembly 2 includes a cover 21 covering the oil pool 1, and the open area of ​​the oil pool 1 is adjusted by moving the cover 21, so as to control the combustion heat released by the oil pool fire; A driving assembly 3 for driving the cover plate 21 to move; A guide rail assembly 4 for supporting the movement of the cover plate 21; The control component used to control the operation of the driving component 3 controls the moving speed of the cover plate 21 through the driving component 3, thereby controlling the heat release rate of the oil pool fire.

[0035] In this embodiment, the oil pool 1 is a square oil pool, and a cover plate assembly 2, a drive assembly 3 and a guide rail assembly 4 with the same structure are arranged opposite to each other on both sides of the oil pool 1; the two cover plates 21 located on both sides of the oil pool 1 are both square cover plates; the two cover plates 21 move along the length direction of the oil pool 1, and when the two cover plates 21 move toward each other, they are used to reduce the open area of ​​the oil pool 1 until the oil pool 1 is completely closed, and when the two cover plates 21 move in the opposite direction, they are used to increase the open area of ​​the oil pool 1 until the oil pool 1 is completely opened.

[0036] In this embodiment, the cover assembly 2 specifically includes a cover 21, a cover bracket 22, a cushion block 23 and a slider 24. The driving assembly 3 includes a screw rod 31, a nut 32 sleeved on the screw rod 31 and a motor 33 driving the screw rod 31 to rotate. The guide rail assembly 4 includes a guide rail 41.

[0037] One side of the cover plate 21 is installed above the cover plate bracket 22, and the two are fixed by screws and can be freely disassembled and replaced. The other side of the cover plate 21 covers the oil pool 1. A slider 24 is provided below the cover plate bracket 22, and the slider 24 is connected to the cover plate bracket 22 through a pad 23. A groove is provided below the slider 24 for sliding connection with the guide rail 41, so that the cover plate bracket 22 and the cover plate 21 can move along the direction of the guide rail 41.

[0038] The lower part of the cover bracket 22 is also connected to the nut 32 through the L-shaped mounting plate 26. The screw rod 31 rotates to drive the nut 32 to move along the direction of the screw rod 31, thereby driving the cover bracket 22 and the cover 21 to move along the direction of the screw rod 31. The motor 33 is connected to the screw rod 31 through a coupling 34.

[0039] The guide rail 41 and the lead screw 31 are both laid along the length direction of the oil pool 1 .

[0040] A sealing structure 25 is also provided below the cover plate 21. A concave groove is provided below the sealing structure 25 along the length direction of the oil pool 1. The concave groove is embedded with the edge of the oil pool 1 along the length direction, thereby effectively avoiding the problem of oil pool fire spilling due to the contact gap between the cover plate 21 and the edge of the oil pool 1.

[0041] In this embodiment, sliders 24 are provided below both sides of the cover bracket 22 along the width direction of the oil pool 1 , and the corresponding guide rail assembly includes two guide rails 41 , which are respectively located below both sides of the cover bracket 22 along the width direction of the oil pool 1 .

[0042] In this embodiment, the guide rail assembly 4 further includes a guide rail bracket 42. The guide rail bracket 42 forms a bottom support structure of the entire device through a leveling base 44 at the bottom, and the guide rail 41 and the drive assembly 3 are both mounted on the guide rail bracket 42. Among them, the motor 33 is fixedly mounted on the motor mounting plate on the guide rail bracket 42 through an L-shaped motor mounting frame.

[0043] In this embodiment, a travel switch 43 is also provided on the guide rail 41. When the slider 24 slides on the guide rail 41 and touches the travel switch 43, the motor 33 stops running or runs in the reverse direction. The two initial positions of the cover 21 being fully closed or fully opened can be detected by the travel switch 43.

[0044] In this embodiment, the control component includes a driver, a controller (PLC, programmable logic controller), a displacement sensor 51 and a power supply. Among them, the driver, controller, power supply and other devices are built into the control cabinet 53. The displacement sensor 51 is specifically a pull-wire displacement sensor, which is installed at the end of the guide rail 41, and is used to accurately measure the displacement of the cover 21 and feed back the displacement detection result to the controller. The controller is used to send control instructions to the driver according to the set heat release rate curve; the driver is used to control the operation of the motor 33 according to the control instructions, thereby controlling the movement speed of the cover 21. The power supply is used to power the motor 33 through the power cord 52.

[0045] In this embodiment, the driver can be selected according to the required torque, operating speed and power supply conditions, and a micro-stepping function is provided, thereby greatly improving the positioning accuracy and running stability. The motor 33 drives the screw 31 to rotate, driving the cover plate 21 to move forward and backward along the length direction of the oil pool 1, and can achieve a movement accuracy of 1mm / s. The controller can write its own running program according to the experimental needs to achieve precise control of the movement of the cover plate 21, and has a pulse output function for controlling the driver. The motor 33 is a stepper motor, and the operating speed can be adjusted by controlling the pulse frequency. In order to start and stop smoothly, acceleration and deceleration control (S curve or trapezoidal acceleration and deceleration) is used. Set parameters such as pulse frequency, acceleration, deceleration, etc. in the controller to avoid excessive impact when just starting or stopping.

[0046] Since there are two cover plates 21 in this embodiment, synchronous control logic needs to be considered. Therefore, a multi-axis motion controller outputs synchronous pulses to each driver to keep the moving speed and moving position of the two cover plates 21 consistent. In the controller, position parameters are set for each cover plate 21, such as opening 0% to 100% or stroke 0mm to Xmm, and the stroke position of the two cover plates 21 is calculated according to the required open area of ​​the oil pool 1. For example, the total stroke of the cover plate 21 on one side from fully closed to fully open is 1 meter, which is proportional to the target opening.

[0047] During the oil pool fire test, the automatic control logic can be realized by programming: 1. According to the fire growth curve (i.e., heat release rate curve): based on time, control instructions are generated according to the preset heat release rate curve to gradually increase the open area of ​​the oil pool 1 (i.e., the two cover plates 21 are opened) so that the combustion scale increases according to the design requirements.

[0048] 2. Maintain opening: Stay at a specified opening or open area for a period of time to maintain a specific fire scale.

[0049] 3. Close or continue to open: Continue to perform opening and closing actions as required until the test is completed.

[0050] In this embodiment, the control component can also communicate with an external calorimeter. Specifically, the controller receives the measurement signal of the calorimeter and calculates the measured value of the heat release rate based on the heat measured in real time by the calorimeter. During the experiment, the controller of the present invention is connected to the calorimeter for communication to realize real-time monitoring of the heat release rate of the oil pool fire. As the cover plate 21 moves, the measured value of the heat release rate is compared with the set value in the heat release rate curve, and the control instruction is fed back to the driver in a timely manner according to the set error range. If the measured value of the heat release rate is less than the set value and the error between the two exceeds the set range, the operation of the motor 33 is accelerated to increase the moving speed of the cover plate 21; if the measured value of the heat release rate is greater than the set value and the error between the two exceeds the set range, the operation of the motor 33 is decelerated to reduce the moving speed of the cover plate 21; so that the error between the measured value of the heat release rate and the set value remains within the set range.

[0051] Example 2 Based on the oil pool fire device with controllable heat release rate in the above embodiment 1, this embodiment 2 provides a control method for the oil pool fire device with controllable heat release rate, which is specifically as follows: In the initial state, the two cover plates 21 located on both sides of the oil pool 1 are completely closed so that the oil pool 1 is in a sealed state, and the closed positions of the two cover plates 21 are located on the center line of the oil pool 1 perpendicular to the length direction; During the experiment, the controller sets the heat release rate curve Q m (t), synchronously control the motors 33 on both sides of the oil pool 1 to operate, drive the two cover plates 21 to move in opposite directions to both sides of the oil pool 1 at the same moving speed v, so that the oil pool fire follows the set heat release rate curve Q m (t) Releases the combustion heat, and the calculation formula of the moving speed v is as follows: ; In the formula, m is the burning rate per unit area, in kg / (m²·s); k and β are both fuel property parameters, k is the extinction coefficient, in m -1 , β is the mean-beam-length correction, in m, which can be obtained by referring to the literature; d is the width of the oil pool, in m; v is the moving speed of the cover plate 21, in m / s; t is the moving time of the cover plate 21, in s; ΔH c is the heat of combustion of the fuel, in J / kg; is the combustion efficiency, which can be obtained by consulting the literature; Q m (t) is the heat release rate setting value at time t in the heat release rate curve, in kW.

[0052] During the experiment, the controller receives the measurement signal of the calorimeter in real time, calculates the measured value of the heat release rate in real time according to the heat measured by the calorimeter, compares the measured value of the heat release rate with the set value in the heat release rate curve, and calculates the error ε between the two: ; In the formula, Q(t) is the measured value of the heat release rate at time t, in kW.

[0053] If the measured value of the heat release rate is less than the set value and the error ε between the two exceeds the set range, the operation of the motor 33 is accelerated to increase the moving speed of the cover 21; if the measured value of the heat release rate is greater than the set value and the error ε between the two exceeds the set range, the operation of the motor 33 is decelerated to reduce the moving speed of the cover 21; thereby, the error between the measured value of the heat release rate and the set value is kept within the set range.

[0054] like Figure 7-10 As shown, the comparison between the heat release rate measurement value and the set value when different fuels realize different fire growth rate curves (heat release rate curves) is shown. By using the method of the present invention, different heat release rate curves can be realized for the same fuel. Figure 7 and Figure 8 All are heptane fuels, and the rapid combustion of heptane can be achieved by controlling the moving speed of the cover plate ( Figure 7 ) and heptane burning at a moderate speed ( Figure 8 ); Fig. 9 and Fig.10 All are diesel fuel, and the rapid combustion of diesel can be achieved by controlling the moving speed of the cover plate ( Fig. 9 ) and diesel burning medium speed fire ( Fig.10 ). In addition, Figure 7 and Fig. 9 The same fire growth rate curve can be achieved by the device of the present invention for different fuels, namely heptane and diesel.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil pool fire device with controllable heat release rate, characterized in that: include: an oil sump (1) for holding fuel; at least one movable cover plate assembly (2); the cover plate assembly (2) comprises a cover plate (21) covering the oil pool (1), and the open area of ​​the oil pool (1) is adjusted by moving the cover plate (21), thereby controlling the combustion heat released by the oil pool fire; A driving assembly (3) for driving the cover plate (21) to move; A guide rail assembly (4) for supporting the movement of the cover plate (21); A control component for controlling the operation of a drive component (3) controls the moving speed of the cover plate (21) through the drive component (3), thereby controlling the heat release rate of the oil pool fire.

2. The oil pool fire device with controllable heat release rate according to claim 1, characterized in that: The cover plate assembly (2) comprises a cover plate (21), a cover plate bracket (22) and a slider (24); the guide rail assembly (4) comprises a guide rail (41); One side of the cover plate (21) is mounted on the cover plate bracket (22), and the other side of the cover plate (21) covers the oil pool (1); a slider (24) is provided below the cover plate bracket (22); the slider (24) is slidably connected to the guide rail (41); The driving assembly (3) drives the cover plate bracket (22) and the cover plate (21) to move along the horizontal plane direction of the oil pool (1).

3. The oil pool fire device with controllable heat release rate according to claim 2, characterized in that: The driving assembly (3) comprises a screw rod (31), a nut (32) sleeved on the screw rod (31), and a motor (33) for driving the screw rod (31) to rotate; The cover plate bracket (22) is connected to the nut (32), and the screw rod (31) rotates to drive the nut (32) to move along the direction of the screw rod (31), thereby driving the cover plate bracket (22) and the cover plate (21) to move along the horizontal plane direction of the oil pool (1).

4. The oil pool fire device with controllable heat release rate according to claim 2, characterized in that: The guide rail (41) is provided with a travel switch (43), and when the slider (24) touches the travel switch (43), the driving component (3) stops driving.

5. The oil pool fire device with controllable heat release rate according to claim 2, characterized in that: The oil pool (1) is a square oil pool, and the cover plate (21) moves along the length direction of the oil pool (1); a sealing structure is provided below the cover plate (21), and a concave groove is provided below the sealing structure along the length direction of the oil pool (1), and the concave groove is engaged with the edge of the oil pool (1) along the length direction.

6. The oil pool fire device with controllable heat release rate according to claim 1, characterized in that: The control component comprises a driver, a controller and a power supply; the controller is used to send a control instruction to the driver according to a set heat release rate curve; the driver is used to control the operation of the drive component (3) according to the control instruction, thereby controlling the moving speed of the cover plate (21); and the power supply is used to supply power to the drive component (3).

7. The oil pool fire device with controllable heat release rate according to claim 6, characterized in that: The controller is also connected to an external calorimeter for communication, and calculates a measured value of the heat release rate based on the heat measured in real time by the calorimeter; compares the measured value of the heat release rate with a set value in a heat release rate curve; if the measured value of the heat release rate is less than the set value and the error between the two exceeds a set range, the operation of the drive component (3) is accelerated, and the moving speed of the cover plate (21) is increased; if the measured value of the heat release rate is greater than the set value and the error between the two exceeds a set range, the operation of the drive component (3) is decelerated, and the moving speed of the cover plate (21) is reduced; so that the error between the measured value of the heat release rate and the set value remains within a set range.

8. An oil pool fire device with controllable heat release rate according to any one of claims 1 to 7, characterized in that: The oil pool (1) is a square oil pool, and a cover plate assembly (2), a drive assembly (3) and a guide rail assembly (4) having the same structure are arranged on both sides of the oil pool (1) in a relative manner; the two cover plates (21) located on both sides of the oil pool (1) move along the length direction of the oil pool (1), and are used to close the oil pool (1) when moving towards each other, and are used to open the oil pool (1) when moving in the opposite direction.

9. A method for controlling an oil pool fire device with controllable heat release rate, characterized in that: The control method of the oil pool fire device with controllable heat release rate as applied to claim 8 is as follows: In the initial state, the two cover plates (21) are closed so that the oil pool (1) is in a sealed state, and the closed position of the two cover plates (21) is located on the center line of the oil pool (1) perpendicular to the length direction; During the experiment, the control component is set according to the heat release rate curve Q m (t), synchronously controlling the driving components (3) located on both sides of the oil pool (1) to operate, driving the two cover plates (21) to move in opposite directions to both sides of the oil pool (1) at the same moving speed v, so that the oil pool fire is heated according to the set heat release rate curve Q m (t) Releases the combustion heat, and the calculation formula of the moving speed v is as follows: ； Wherein, m is the burning rate per unit area; k and β are both fuel property parameters; d is the width of the oil pool (1); v is the moving speed of the cover plate (21); t is the moving time of the cover plate (21); ΔH c The heat of combustion of the fuel; is the combustion efficiency; Q m (t) is the heat release rate setting value at time t in the heat release rate curve.

10. A control method for an oil pool fire device with controllable heat release rate according to claim 9, characterized in that: During the experiment, the control component receives the measurement signal of the calorimeter in real time, calculates the measured value of the heat release rate in real time based on the heat measured by the calorimeter, compares the measured value of the heat release rate with the set value in the heat release rate curve, and calculates the error ε between the two: ； In the formula, Q(t) is the measured value of heat release rate at time t; If the measured value of the heat release rate is less than the set value and the error ε between the two exceeds the set range, the operation of the drive component (3) is accelerated, and the moving speed of the cover plate (21) is increased; if the measured value of the heat release rate is greater than the set value and the error ε between the two exceeds the set range, the operation of the drive component (3) is decelerated, and the moving speed of the cover plate (21) is reduced; thereby, the error between the measured value of the heat release rate and the set value is maintained within the set range.

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