A fire protection device and control method for electric vehicles used in rapid isolation parking lots

Abstract

A fire protection device and control method for electric vehicles used in a rapid isolation parking lot, comprising a fire-blocking curtain mechanism disposed between the tops of adjacent parking spaces in the parking lot, the fire-blocking curtain mechanism comprising a central axis and a rotating drum rotatably sleeved outside the central axis, a torsion spring being disposed between the rotating drum and the central axis, and a curtain of a fire-blocking curtain being wound on the rotating drum; the fire protection device also comprises a motor for driving the rotating drum to rotate and a clutch for locking the rotating drum and cooperating with the motor drive, an air bag being disposed in the clutch to release the clutch from limiting the rotating drum; a reset spring for returning the clutch to the locked position is disposed at the outer end of the clutch. When the air bag is opened, the instantaneous impulse pushes the clutch away, releasing the lock on the rotating drum, and the torsion spring resets and drives the rotating drum to rotate to release and lower the curtain until the torque drops, the reset spring presses the clutch back to re-lock the rotating drum, and the motor drives the rotating drum forward until the curtain completes the descent. The device shortens the unlocking time of the rotating drum and greatly improves the response efficiency of the fire-blocking curtain mechanism.

Description

Technical Field

[0001] The invention relates to the field of fire protection facilities, and in particular to an electric vehicle fire protection device for rapid isolation of parking lots and a control method thereof. Background Art

[0002] With the development and popularization of electric vehicles, multi-story parking garages for electric vehicle parking and charging have been gradually built, making the use of electric vehicles more convenient. However, electric vehicle fires have become more and more serious in recent years. According to the characteristics of lithium batteries, overcharging during the charging process is most likely to cause battery fires, and the fire spreads very quickly, endangering the safety of parking lots. Common preventive measures for parking lot fires include setting up fire isolation protection devices on adjacent parking spaces in the parking lot, among which fire curtains are a more common type.

[0003] In the related art, a fire prevention and control system and method for electric vehicles for parking lots disclosed in publication number CN118491008A, the working principle of the fire curtain of which is as follows: when the driver receives the start signal of the zone controller, the limit unlocking mechanism is controlled according to the current at the locking mechanism to lock the sleeve, so that the sleeve fixedly connected to the sleeve is locked, and the motor drives the rotating seat fixedly connected to the output shaft to rotate slightly, offsetting the radial force exerted on the pin in the rotating seat, so that the pin is adsorbed by the electromagnet assembly, the locking mechanism is unlocked, the torsion spring is reset, and extremely strong and extremely fast torque and torque speed are instantly burst out, driving the sleeve to rotate forward at high speed, and the sleeve fixed to the sleeve and the fire curtain wrapped on the sleeve follow its high-speed forward rotation, and the fire curtain is quickly ejected; until after a period of time, the torque and torque speed of the torsion spring reset decrease, and when they are lower than the torque and torque speed of the motor, the locking mechanism locks the sleeve and the rotating seat, and at the same time the motor is started, and the rotating seat is driven to rotate by the output shaft of the motor, driving the sleeve to rotate forward to drive the fire curtain to continue to descend.

[0004] The fire curtain of the invention is ejected by the torque reset after the torsion spring is tightened, and has the characteristics of large instantaneous burst torque and fast torque speed, but still has the following defects: before releasing the fire curtain, it is necessary to lock the sleeve through the limit unlocking mechanism to lock the shaft sleeve, and then control the rotating seat to rotate slightly forward to offset the radial force on the pin in the rotating seat, so that the pin can be adsorbed by the electromagnet assembly to complete the unlocking. After the pin is adsorbed and unlocked, the torsion spring can reset and pop out the fire curtain and provide the initial rotational power for it. This process is closely linked, involves many parts, and is relatively cumbersome. It takes a long time from the start signal to the lowering of the fire curtain. Summary of the invention

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A fire protection device for electric vehicles used in a rapid isolation parking lot comprises a fire-blocking curtain mechanism arranged between the tops of adjacent parking spaces in the parking lot, the fire-blocking curtain mechanism comprising a fixedly mounted central axis and a rotating drum sleeved outside the central axis, a torsion spring is arranged between the rotating drum and the central axis, and the two ends of the torsion spring are respectively connected to the rotating drum and the central axis; the fire-blocking curtain mechanism also comprises a motor for driving the rotating drum to rotate and a curtain cloth wound on the rotating drum; the fire protection device also comprises a clutch for limiting the rotation of the rotating drum and cooperating with the motor to drive the rotating drum, a cavity is arranged in the clutch, an airbag is arranged in the cavity, when the airbag is opened, the clutch is pushed open, and the limit lock on the rotating drum is released; the outer end of the clutch is arranged on a reset spring, which is used to press the clutch back to the position of locking the rotating drum.

[0007] Furthermore, a protective cover is provided outside the clutch, and the return spring is provided between the protective cover and the clutch, one end of the return spring supports the inner side of the protective cover, and the other end of the return spring supports the outer end of the clutch.

[0008] Furthermore, a rotatable first rotating seat is provided at one end of the central axis, one end of the torsion spring is fixedly connected to the first rotating seat, and the first rotating seat is fixedly connected to the rotating drum.

[0009] Furthermore, the clutch is provided with a plurality of locking blocks, and the first rotating seat is provided with locking grooves matched with the locking blocks. When the locking blocks of the clutch are inserted into the locking grooves, the first rotating seat is fixedly connected to the clutch.

[0010] Furthermore, the torsion spring is fixedly connected to the central shaft via a fixing seat.

[0011] Furthermore, a counterweight is provided at one end of the curtain that hangs naturally.

[0012] Furthermore, the fire protection device also includes a zone controller and a fire detector arranged on the parking space of the parking lot, and the motor and the fire detector are electrically connected to the zone controller respectively.

[0013] A control method for a fire protection device for electric vehicles used in a rapid isolation parking lot is characterized in that: using the fire protection device for electric vehicles used in a rapid isolation parking lot, the method comprises the following steps:

[0014] Step 1: The clutch locks the drum, the motor reverses, and drives the drum to reverse and roll up the curtain cloth. The torsion spring is tightened and stored during the reversal of the drum;

[0015] Step 2: When a fire occurs, the airbag in the clutch cavity is opened, pushing the clutch open, and releasing the locking limit of the clutch on the drum;

[0016] Step 3: The torsion spring is reset, and the torque and speed are instantly released, driving the drum to rotate and release the curtain;

[0017] Step 4: The torsion force of the torsion spring decreases, and the reset spring at the outer end of the clutch bounces the clutch back to the locked position, relocking the drum. The motor starts, driving the drum to continue rotating until the curtain is completely lowered, isolating the fire area.

[0018] Step 5, after the fire scene is cleaned up, replace the airbag in the clutch cavity, install the clutch to the position of the locking drum, start the motor, reverse the motor, drive the drum to rewind the curtain, and tighten the torsion spring again to store force.

[0019] Furthermore, the clutch is provided with a plurality of locking blocks, the torsion spring is connected to the rotating drum through a first rotating seat rotatably provided on the central axis, the first rotating seat is provided with a locking groove matching with the locking block, and the clutch is inserted into the locking groove of the first rotating seat through the locking block, so that the clutch is fixed to the first rotating seat, thereby locking the rotating drum fixedly connected to the first rotating seat.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention uses a clutch to limit and fix the rotating drum. By opening the airbag in the clutch cavity, the clutch is disengaged instantly, releasing the limit on the rotating drum, thereby resetting the torsion spring, and instantly bursting out extremely strong and fast torque and torque speed, driving the rotating drum to rotate at high speed, quickly lowering the curtain of the fire curtain, and isolating the fire area. This process reduces the pre-order steps for releasing the fire curtain mechanism, has high reliability, and at the same time shortens the time from starting the fire curtain mechanism to completing the curtain lowering, thereby improving the working efficiency of the fire curtain mechanism.

[0022] 2. The present invention arranges fuel and an electric ignition device in the airbag. After receiving the ignition voltage, the electric ignition device ignites the fuel in the airbag. The kinetic energy generated instantly pushes the clutch in the reverse direction, disengaging the clutch and releasing the lock on the rotating drum. It has a faster response speed and higher reliability, which greatly shortens the unlocking time of the rotating drum and improves the response efficiency of the fire curtain mechanism.

[0023] 3. The present invention simplifies the composition structure of the fire curtain mechanism, saves production costs and increases economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the locked state of the clutch of the present invention.

[0026] Figure 3 It is a schematic diagram of the unlocked state of the clutch of the present invention.

[0027] Figure 4It is a stereoscopic diagram of the first rotating seat, the spiral housing and the clutch of the present invention.

[0028] Figure 5 It is a top view of the first rotating seat of the present invention.

[0029] Figure 6 It is a top view of the clutch of the present invention.

[0030] Figure 7 It is a three-dimensional diagram of the protective cover of the present invention.

[0031] Among them, the numbers in the figure are: central axis 11, rotating drum 12, torsion spring 13, motor 14, curtain 15, counterweight 151, first rotating seat 16, rotating seat outer ring 161, rotating seat inner ring 162, locking groove 163, first groove 1631, second groove 1632, second rotating seat 17, fixed seat 18, spiral shell 19, sealing ring 191, clutch 20, locking block 21, cavity 22, airbag 23, return spring 24, protective cover 25, through hole 251, power cord 26. DETAILED DESCRIPTION

[0032] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0033] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] Reference Figure 1 , Figure 2 and Figure 3, a fire protection device for electric vehicles used in a rapid isolation parking lot, including a fire curtain mechanism and a frame for storing the fire curtain mechanism (not shown in the figure), and the frame is arranged between the tops of adjacent parking spaces in the parking lot. The fire curtain mechanism includes a central axis 11 fixedly installed in the frame, and a rotating drum 12 rotatably sleeved outside the central axis 11, a torsion spring 13 is arranged between the rotating drum 12 and the central axis 11, and the two ends of the torsion spring 13 are respectively connected to the central axis 11 and the rotating drum 12. Specifically, in this embodiment, the two ends of the central axis 11 are respectively sleeved with a rotatable first rotating seat 16 and a second rotating seat 17, and the rotating drum 12 is fixedly sleeved on the first rotating seat 16 and the second rotating seat 17 by a plurality of bolt assemblies (not shown in the figure). One end of the torsion spring 13 is fixedly connected to the first rotating seat 16, and the other end of the torsion spring 13 is fixedly connected to the central shaft 11 through the fixing seat 18; in addition, in some embodiments, a socket can also be set at the corresponding position of the central shaft 11 and the rotating drum 12, and the two ends of the torsion spring 13 are respectively inserted into the corresponding sockets to achieve fixed connection with the central shaft 11 and the rotating drum 12. The curtain 15 of the fire-blocking curtain mechanism is wound on the rotating drum 12, and a counterweight 151 is provided at one end of the curtain 15 that naturally hangs down. When a fire occurs in the parking lot, the fire protection device is activated, and the curtain 15 is lowered until the counterweight 151 falls to the ground to isolate the fire area.

[0035] Reference Figure 1 , Figure 4 , Figure 5 and Figure 6 The fire protection device further includes a clutch 20 for limiting the rotation of the drum 12, and the clutch 20 is provided with two locking blocks 21. The first rotating seat 16 includes a rotating seat outer ring 161 and a rotating seat inner ring 162, the rotating seat outer ring 161 is provided with a first groove 1631, and the rotating seat inner ring 162 is provided with a second groove 1632. When the rotating seat outer ring 161 and the rotating seat inner ring 162 rotate to corresponding positions, the first groove 1631 and the second groove 1632 form a locking groove 163 for inserting the locking block 21 of the clutch 20. When the locking block 21 of the clutch 20 is inserted into the locking groove 163 of the first rotating seat 16, the first rotating seat 16 is locked and limited, thereby locking the drum 12 fixedly connected to the first rotating seat 16.

[0036] Reference Figure 1 , Figure 4 , Figure 5 and Figure 6The fire curtain mechanism further includes a motor 14 for driving the rotating drum 12 to rotate. In this embodiment, the output shaft of the motor 14 extends into the first rotating seat 16 and is fixed by the spiral housing 19. When the locking block 21 of the clutch 20 is inserted into the locking groove 163, the rotating drum 12 enters a locked state, the motor 14 is started, and the output shaft of the motor 14 drives the first rotating seat 16 to rotate, and the rotating drum 12 fixedly connected to the first rotating seat 16 and the second rotating seat 17 fixed to the rotating drum 12 rotate accordingly, and the curtain 15 wound on the rotating drum 16 is rolled up or released.

[0037] Reference Figure 1-Figure 7 The clutch 20 is provided with a cavity 22, and an airbag 23 for pushing the clutch 20 is provided in the cavity 22. Specifically, in this embodiment, the airbag 23 uses PA66 fiber as the outer skin, which wraps the gas with nitrogen as the main component, the ignition powder and the electric ignition device; when the electric ignition device receives the electronic pulse (voltage 12-36V, current above 1.5A) transmitted to the airbag 23 by the power cord 26, the electric heating wire in the electric ignition device quickly heats up, ignites the ignition powder inside the airbag 23, and the ignition powder rapidly burns the gas in the airbag 23, so that the gas expands in a short time to generate kinetic energy, which is output through multiple small holes on the partition (not marked in the figure) in the cavity 22, and pushes the clutch 20 in the reverse direction, so that the clutch 20 is separated from the first rotating seat 16, and the drum 12 enters the unlocked state. In addition, the airbag 23 can also be opened by means of mature gas generators on the market, and its principle is not repeated here. A sealing ring 191 is sleeved on the threaded housing 19 to prevent gas leakage after the airbag 23 is opened.

[0038] Reference Figure 1 , Figure 2 , Figure 3 and Figure 7 The fire protection device also includes a protective cover 25. A return spring 24 is provided between the protective cover 25 and the clutch 20. One end of the return spring 24 supports the inner side of the protective cover 25, and the other end supports the outer end of the clutch 20. The protective cover 25 is fixed in the frame, and the protective cover 25 is provided with a through hole 251 for the power line 26 to pass through. When a fire occurs, the ignition voltage is transmitted to the electric ignition device in the air bag 23 through the power line 26, and the air bag 23 is opened in a very short time. The kinetic energy generated pushes the clutch 20 in the opposite direction, thereby unlocking the rotating drum 12. After the rotating drum 12 is unlocked, the torsion spring 13 is reset, and a very strong and fast torque and torque speed are instantly burst out, which pops out the curtain 15 and drives the rotating drum 12 to rotate quickly to lower the curtain 15. When the torque speed of the torsion spring 13 drops to a speed lower than the speed of the motor 14, the reset spring 24 is reset, pressing the locking block 21 of the clutch 20 back into the locking groove 163, and the rotating drum 12 is limited and locked again. The motor 14 drives the first rotating seat 16 and the rotating drum 12 to rotate until the counterweight block 151 at the end of the curtain 15 falls to the ground, completing the lowering process of the curtain.

[0039] In this embodiment, the fire protection device also includes a regional controller and a fire detector (not shown in the figure) arranged in the parking lot. The motor 14, the clutch 20 and the fire detector are electrically connected to the regional controller respectively. Specifically, the regional controller is placed at the front end of the charging pile inlet of the parking space, and can control the switch power of the charging pile to be turned off. The fire detector can be a smoke sensor, a temperature sensor, a flame camera and other detection equipment, which are arranged according to the actual situation of the parking lot. When the fire detector detects the sign of a fire in the parking lot, it sends an abnormal signal to the regional controller. After receiving the abnormal signal, the regional controller transmits the ignition voltage to the electric ignition device in the airbag 23 through the power line 26 to ignite the explosive in the airbag 23. The energy generated by the clutch 20 pushes the clutch 20 away, releases the locking limit of the rotating drum 12, and the torsion spring 13 resets to drive the rotating drum 12 to rotate quickly to release the curtain 15.

[0040] Reference Figure 1-Figure 7 , a method for quickly isolating a fire protection device for an electric vehicle in a parking lot, comprising the following steps:

[0041] Step 1: When installing the fire curtain mechanism, the outer ring 161 of the rotating seat and the inner ring 162 of the rotating seat rotate to the first groove 1631 and the second groove 1632 to form the completed locking groove 163, and the clutch 20 is inserted into the locking groove 163 through the locking block 21 to lock the rotating drum 12. The motor 14 reverses to drive the first rotating seat 16, driving the rotating drum 12 and the second rotating seat 17 to rotate, and the curtain 15 is rolled into the frame, and the central shaft 11 is fixed in the frame and remains stationary. The torsion spring 13 is tightened and stored during the rolling process of the curtain 15.

[0042] Step 2, the fire detector detects a fire in the parking lot and sends an abnormal signal to the zone controller. After receiving the abnormal signal, the zone controller transmits the ignition voltage to the electric ignition device in the airbag 23 through the power line 26. The heating wire in the electric ignition device heats up rapidly, igniting the explosive in the airbag 23. The explosive burns rapidly, and the kinetic energy generated pushes the clutch 20 open, releasing the limit lock on the rotating drum 12.

[0043] Step 3, the drum 12 is unlocked, the torsion spring 13 is reset, and an extremely fast and strong torque and speed are instantly generated, driving the first rotating seat 16, the second rotating seat 17 and the drum 12 to rotate at high speed, ejecting the curtain 15 of the fire-blocking curtain mechanism, and providing the initial rotational power for the drum 12;

[0044] Step 4, during the process of the torque speed decreasing when the torsion spring 13 is reset, the reset spring 24 at the outer end of the clutch 20 presses the clutch 20 back to the locking block 21 and inserts it into the locking groove 163, and re-locks the limiting rotating drum 12. At this time, the torque speed is lower than the rotation speed of the motor 14, and the motor 14 is started. The motor 14 rotates forward, driving the first rotating seat 16, the rotating drum 12, and the second rotating seat 17 to continue to rotate, and the curtain 15 is lowered to the counterweight block 151 and falls to the ground, isolating the fire area.

[0045] Step 5, after the fire scene is cleaned up, replace the airbag 23 in the cavity 22, insert the locking block 21 of the clutch 20 into the locking groove 163 to lock the rotating drum 12, start the motor 14, reverse the motor 14, drive the first rotating seat 16 to rotate, and then drive the rotating drum 12 to rewind the curtain 15 back into the frame, and the torsion spring 13 is tightened again to store force.

[0046] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A fire protection device for electric vehicles used in a rapid isolation parking lot, comprising a fire-blocking curtain mechanism disposed between the tops of adjacent parking spaces in the parking lot, characterized in that: The fire curtain mechanism comprises a fixedly mounted central shaft and a rotating drum rotatably sleeved on the central shaft, a torsion spring is arranged between the rotating drum and the central shaft, and two ends of the torsion spring are respectively connected to the central shaft and the rotating drum; The fire curtain mechanism also includes a motor for driving the drum to rotate; The fire-blocking curtain mechanism also includes a curtain, one end of which is wound around the drum, and the other end of which hangs down naturally; The fire protection device also includes a clutch for locking the limit rotating drum and cooperating with the motor to drive the rotating drum. When the clutch locks the rotating drum, the motor can drive the rotating drum to rotate; A rotatable first rotating seat is provided at one end of the central shaft, one end of the torsion spring is fixedly connected to the first rotating seat, and the first rotating seat is fixedly connected to the rotating drum; The clutch is provided with a plurality of locking blocks, and the first rotating seat is provided with locking grooves for inserting the locking blocks; The first rotating seat comprises a rotating seat outer ring and a rotating seat inner ring, the rotating seat outer ring is provided with a first groove, the rotating seat inner ring is provided with a second groove, when the rotating seat outer ring and the rotating seat inner ring rotate to corresponding positions, the first groove and the second groove constitute the locking groove for inserting the locking block of the clutch; The clutch is provided with a cavity, and an air bag is provided in the cavity. When the air bag is opened, the clutch is pushed open, and the limit lock on the rotating drum is released; The clutch is provided with a return spring outside to return the clutch that has been pushed open.

2. The electric vehicle fire protection device for rapid isolation parking lot according to claim 1, characterized in that: A protective cover is arranged outside the clutch, and two ends of the return spring respectively support the outer end of the clutch and the inner side of the protective cover.

3. The electric vehicle fire protection device for rapid isolation parking lot according to claim 1 is characterized by: The torsion spring is fixedly connected to the central shaft via a fixing seat.

4. The electric vehicle fire protection device for rapid isolation parking lot according to claim 1 is characterized by: A counterweight is arranged at one end of the curtain where the curtain hangs naturally.

5. The electric vehicle fire protection device for rapid isolation parking lot according to claim 1 is characterized by: The fire protection device also includes a zone controller and a fire detector arranged in the parking lot, and the motor and the fire detector are electrically connected to the zone controller respectively.

6. The electric vehicle fire protection device for rapid isolation parking lot according to claim 1, characterized in that: The fire protection device also includes a frame for accommodating a fire curtain mechanism, the frame is installed on the top of adjacent parking spaces in the parking lot, and both ends of the central axis are fixed in the frame.

7. A control method for a fire protection device for electric vehicles used in a rapid isolation parking lot, characterized in that: The electric vehicle fire protection device for rapid isolation parking lot according to claim 1 comprises the following steps: Step 1: The clutch locks the drum, the motor reverses, and drives the drum to reverse and roll up the curtain cloth. The torsion spring is tightened and stored during the reversal of the drum; Step 2: When a fire occurs, the airbag in the clutch cavity is opened, pushing the clutch open, and releasing the locking limit of the clutch on the drum; Step 3: The torsion spring is reset, and the torque and speed are instantly released, driving the drum to rotate and release the curtain; Step 4: The torsion speed of the torsion spring decreases, and the reset spring at the outer end of the clutch bounces the clutch back to the locked position, relocking the drum. The motor starts, driving the drum to continue rotating until the curtain is completely lowered, isolating the fire area. Step 5, after the fire scene is cleaned up, replace the airbag in the clutch cavity, install the clutch to the position of the locking drum, start the motor, reverse the motor, drive the drum to rewind the curtain, and tighten the torsion spring again to store force.

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