Intelligent tunnel fire prevention system and control method

Abstract

The application relates to an intelligent tunnel fireproof system and a control method, and relates to the technical field of tunnel fireproof equipment. The system comprises a storage box which is slidably arranged under the ground surface of a tunnel, the storage box is filled with fire-retardant capsules, and a through hole is formed in the top of the storage box; a heating plate is arranged in the storage box; an image acquisition terminal is arranged in the tunnel; a wireless control terminal is in communication connection with the heating plate and the image acquisition terminal, the wireless control terminal is responsive to the acquisition image output by the image acquisition terminal, and the heating plate is controlled to be heated, so that the fire-retardant capsules release fire-retardant gas into the tunnel through the through hole after being heated. The application has the effect of improving the safety coefficient of the tunnel.

Description

Technical Field

[0001] This application relates to the technical field of tunnel fire protection equipment, and in particular to an intelligent tunnel fire protection system and control method. Background Technology

[0002] Since a tunnel is an engineering structure buried underground, the interior space of a tunnel is relatively enclosed. Therefore, it is necessary to equip the tunnel with fire extinguishers in accordance with fire prevention requirements and to set up corresponding fire-proof passages inside the tunnel to reduce the spread of fire or personnel injury in the event of a fire inside the tunnel.

[0003] Regarding the aforementioned technologies, the inventors believe that when dense smoke or fire occurs inside a tunnel, extinguishing the fire using fire extinguishers installed inside the tunnel may not be timely, potentially leading to further spread of the fire. Summary of the Invention

[0004] To address the problem of fire spreading due to untimely handling of fire sources in tunnels, this application provides an intelligent tunnel fire prevention system and control method.

[0005] In the first aspect, this application provides an intelligent tunnel fire prevention system, which adopts the following technical solution:

[0006] An intelligent tunnel fire protection system includes:

[0007] A storage box is slidably installed below the tunnel surface. The storage box contains flame-retardant capsules, and a through hole is provided on the top of the storage box.

[0008] A heating plate is installed inside the storage box;

[0009] Image acquisition terminal, installed inside the tunnel;

[0010] The wireless control terminal is communicatively connected to both the heating plate and the image acquisition terminal. The wireless control terminal responds to the acquired image output by the image acquisition terminal and controls the heating plate to heat up, so that the flame-retardant capsule releases flame-retardant gas into the tunnel through the through hole after being heated.

[0011] By adopting the above technical solution, the image acquisition terminal sends the acquired image to the wireless control terminal. When the wireless control terminal detects smoke or flames in the acquired image, it controls the heating plate to heat up, so that the flame-retardant capsule in the storage box releases flame-retardant gas after being heated. The flame-retardant gas limits the spread of the fire source through the tunnel surface, thereby achieving rapid extinguishing of the fire source in the tunnel, further reducing the possibility of personnel injury and improving the safety factor inside the tunnel.

[0012] Preferably, a through groove is provided on the side wall of the storage box, a filter plate is slidably disposed in the through groove, a filter hole is provided on the filter plate, a through hole for communicating with the filter hole is provided on the top of the storage box, a control mechanism for controlling the relative sliding of the filter plate and the storage box is provided on the storage box, and a limiting mechanism for limiting the relative position of the filter plate and the storage box is also provided on the storage box.

[0013] By adopting the above technical solution, the filter plate can slide on the storage box by adjusting the limiting mechanism, and the control mechanism can be adjusted to make the filter plate slide, thereby controlling the output of the flame-retardant gas released into the tunnel. When replenishing the flame-retardant capsules inside the storage box, the limiting mechanism can be adjusted to fix the filter plate relatively to the storage box, and the control mechanism can be adjusted to make the storage box shake as a whole, so that the replenished flame-retardant capsules are evenly distributed in the storage box, so that the flame-retardant capsules are more likely to volatilize after making full contact with the heating plate.

[0014] Preferably, the limiting mechanism includes a rack passing through the storage box, a connecting rod rotatably connected to the storage box, a spur gear coaxially fixed on the connecting rod that meshes with the rack, a limiting groove for inserting the rack on the tunnel surface, and a positioning groove for inserting the rack on the filter plate.

[0015] By adopting the above technical solution, rotating the connecting rod causes the spur gear and rack to mesh, thus rotating the connecting rod and causing the rack to slide on the storage box. This allows the rack to be inserted into the limiting groove or positioning groove, enabling the filter plate to slide inside the storage box, or the filter plate to be fixed relative to the storage box.

[0016] Preferably, the control mechanism includes a turntable rotatably connected to the tunnel surface, a connecting rod rotatably connected to the turntable, and a limiting plate fixed to the side wall of the filter plate and rotatably connected to the connecting rod.

[0017] By adopting the above technical solution, rotating the turntable causes the connecting rod to move, which in turn causes the filter plate to slide or the storage box to slide as a whole, thus achieving the adjustment of the output of flame-retardant gas and the even distribution of the replenished flame-retardant capsules in the storage box.

[0018] Preferably, an installation groove is provided in the surface of the tunnel, a drive motor is installed in the installation groove, and a connecting component is provided on the drive motor. The connecting component is used to control the rotation of the connecting rod or the turntable.

[0019] By adopting the above technical solution and setting up connecting components, the filter plate or the entire storage box can be controlled to slide through the same drive source, effectively improving the utilization rate of the drive motor.

[0020] Preferably, the connecting assembly includes a limiting sleeve rotatably connected to the tunnel surface. The inner wall of the limiting sleeve has a first keyway. A first connecting key that mates with the first keyway is fixed on the connecting rod. A first bevel gear is coaxially fixed to the end of the limiting sleeve away from the connecting rod. A sliding sleeve is fitted onto the output shaft of the drive motor. The inner wall of the sliding sleeve has a second keyway. A second connecting key that mates with the second keyway is fixed on the output shaft of the drive motor. A second bevel gear for meshing with the first bevel gear is fixed on the sliding sleeve. A first pulley is coaxially fixed on the turntable. A second pulley is rotatably connected to the wall of the mounting groove. The first and second pulleys are connected by a synchronous belt. A third bevel gear is coaxially fixed to the second pulley. A fourth bevel gear for meshing with the third bevel gear is fixed on the sliding sleeve. A drive cylinder is also installed inside the tunnel surface. One end of the piston rod of the drive cylinder, which passes through the mounting groove, is rotatably connected to the sliding sleeve.

[0021] By adopting the above technical solution, the first and second bevel gears can be meshed by adjusting the cylinder. Then, the drive motor's output shaft rotates, causing the sliding sleeve to rotate. The sliding sleeve then rotates, causing the second bevel gear to rotate. The second bevel gear then rotates, causing the connecting rod to rotate, thus achieving the adjustment of the rack's sliding mechanism. Alternatively, the third and fourth bevel gears can be meshed by further adjusting the cylinder. Then, the drive motor's output shaft rotates, causing the sliding sleeve to rotate. The sliding sleeve then rotates, causing the fourth bevel gear to rotate. The fourth bevel gear then rotates, causing the second pulley to rotate. Since the first and second pulleys are connected by a synchronous belt, the rotation of the second pulley achieves the rotation of the turntable.

[0022] Preferably, a first magnetic sheet is fixed at both ends of the rack, a second magnetic sheet for attracting the first magnetic sheet is fixed at the bottom of the limiting groove, and a third magnetic sheet for attracting the first magnetic sheet is fixed at the bottom of the positioning groove.

[0023] By adopting the above technical solution, the first and second magnetic sheets cooperate to reduce the possibility of the rack separating from the limiting groove after sliding into it, thus reducing the likelihood of the storage box shaking when the filter plate slides. The first and third magnetic sheets cooperate to reduce the possibility of the rack separating from the positioning groove after sliding into it, thus reducing the likelihood of the filter plate sliding relative to the storage box when it slides.

[0024] Preferably, a feed pipe is installed on the storage box, and a corrugated pipe is fixed to the end of the feed pipe away from the storage box. The end of the corrugated pipe away from the storage box is fixed to the tunnel surface.

[0025] By adopting the above technical solution and setting a corrugated pipe, the situation where the feed pipe is pulled when the storage box slides is reduced, the possibility of separation between the storage box and the feed pipe is reduced, and the stability of the storage box is improved.

[0026] Secondly, this application provides a control method, which adopts the following technical solution:

[0027] A control method, the method being based on the intelligent tunnel fire protection system described in the first aspect, comprising:

[0028] The wireless control terminal acquires the images uploaded by the image acquisition terminal, which are obtained by the image acquisition terminal periodically taking pictures of the tunnel.

[0029] The wireless control terminal extracts smoke features from the acquired image based on a preset smoke model.

[0030] The wireless control terminal generates the smoke coverage area based on the smoke characteristics;

[0031] If the wireless control terminal detects that the smoke coverage area exceeds a preset dense smoke coverage threshold, it sends a pre-stored control command to the heating plate to raise the temperature of the heating plate.

[0032] By adopting the above technical solution, the wireless control terminal can extract smoke features from the collected images based on the smoke model. When the smoke coverage exceeds the preset dense smoke coverage threshold, it can send control commands to the heating plate to achieve flame retardancy in the area where dense smoke appears in the tunnel.

[0033] Preferably, the acquired image carries the acquisition time;

[0034] Before the wireless control terminal determines whether the smoke coverage area exceeds a preset dense smoke coverage threshold, the method further includes:

[0035] The wireless control terminal determines the target smoke coverage area corresponding to each time node in the acquisition time.

[0036] The wireless control terminal obtains the range change of adjacent time nodes based on the target smoke coverage area;

[0037] If the wireless control terminal detects that the range change exceeds a preset trend threshold, it sends a pre-stored control command to the heating plate to raise the temperature of the heating plate.

[0038] By adopting the above technical solution, the wireless control terminal determines the amount of smoke change based on the time obtained from the smoke characteristics, and identifies smoke that is far away from the image acquisition terminal and located in the tunnel through the change trend threshold, thereby realizing the identification of smoke in the tunnel and improving the accuracy of controlling the heating plate.

[0039] In summary, this application includes at least one of the following beneficial technical effects:

[0040] 1. The image acquisition terminal sends the acquired image to the wireless control terminal. When the wireless control terminal detects smoke or flame in the acquired image, it controls the heating plate to heat up, so that the flame-retardant capsule in the storage box releases flame-retardant gas after being heated. The flame-retardant gas limits the spread of the fire source through the tunnel surface, thereby achieving rapid extinguishing of the fire source in the tunnel, further reducing the possibility of personnel injury and improving the safety factor inside the tunnel.

[0041] 2. By adjusting the limiting mechanism, the filter plate can slide on the storage tank. Further adjustment of the control mechanism allows the filter plate to slide, thereby controlling the output of the flame-retardant gas released into the tunnel. When replenishing the flame-retardant capsules inside the storage tank, the limiting mechanism can be adjusted to fix the filter plate relative to the storage tank. Then, the control mechanism can be adjusted to cause the storage tank to shake, ensuring the replenished flame-retardant capsules are evenly distributed within the tank. This allows the flame-retardant capsules to make full contact with the heating plate, facilitating their volatilization. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the overall structure of an intelligent tunnel fire prevention system according to an embodiment of this application.

[0043] Figure 2 This is an overall flowchart of an intelligent tunnel fire prevention system according to an embodiment of this application.

[0044] Figure 3 This is a schematic diagram of the structure of a storage box in an intelligent tunnel fire prevention system according to an embodiment of this application.

[0045] Figure 4 This is a schematic diagram illustrating the internal structure of a storage box in an intelligent tunnel fire prevention system according to an embodiment of this application.

[0046] Figure 5 This is a schematic diagram illustrating the connecting components of an intelligent tunnel fire protection system according to an embodiment of this application.

[0047] Explanation of reference numerals in the attached drawings: 1. Image acquisition terminal; 2. Wireless control terminal; 3. Tunnel surface; 31. Placement slot; 32. Limiting slot; 33. Second magnetic sheet; 34. Mounting slot; 4. Storage box; 41. Heating plate; 42. Through slot; 43. Filter plate; 44. Positioning slot; 5. Control mechanism; 51. Support plate; 52. Turntable; 53. Connecting rod; 54. Limiting plate; 6. Limiting mechanism; 61. Connecting rod; 611. First connecting key; 62. Spur gear; 63. Rack; 64. First magnetic plate; 7. Drive motor; 71. Second connecting key; 8. Connecting assembly; 81. Sliding sleeve; 811. Second keyway; 82. Drive cylinder; 83. First bevel gear; 84. Second bevel gear; 85. Limiting sleeve; 851. First keyway; 86. Third bevel gear; 87. Fourth bevel gear; 88. First pulley; 881. Synchronous belt; 9. Feed pipe; 91. Corrugated pipe. Detailed Implementation

[0048] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0049] Example 1:

[0050] This application discloses an intelligent tunnel fire prevention system. (Refer to...) Figure 1 as well as Figure 2 An intelligent tunnel fire prevention system includes an image acquisition terminal 1 and a wireless control terminal 2 installed on the top of the tunnel wall. The image acquisition terminal 1 can be a camera, and the wireless control terminal 2 can be a server. Multiple placement slots 31 are provided inside the tunnel surface 3. A storage box 4 is installed at the bottom of each slot 31. A heating plate 41 is fixed inside the storage box 4. The heating plate 41 is communicatively connected to the wireless control terminal 2, allowing it to receive control commands from the wireless control terminal 2 and heat up upon receiving the commands. The storage box 4 contains flame-retardant capsules. When heated, the flame-retardant capsules release flame-retardant gas, which is released through the tunnel surface 3 into the tunnel to quickly extinguish fires.

[0051] Reference Figure 3 The storage tank 4 has a through groove 42 on its side wall. A filter plate 43 is slidably mounted on the storage tank 4 within the through groove 42. The filter plate 43 has filter holes. A through hole is provided on the top of the storage tank 4 for communicating with the filter holes. The storage tank 4 is equipped with a control mechanism 5, which is used to control the relative sliding of the filter plate 43 and the storage tank 4. The storage tank 4 is also equipped with a limiting mechanism 6, which is used to limit the relative position of the filter plate 43 and the storage tank 4.

[0052] Reference Figure 3 and Figure 4The limiting mechanism 6 includes a connecting rod 61 rotatably connected to the side wall of the storage box 4, with the rotation axis of the connecting rod 61 arranged along the length of the storage box 4. A spur gear 62 is fixed to one end of the connecting rod 61 inside the storage box 4, and a rack 63 meshing with the spur gear 62 passes through the top of the storage box 4. A limiting groove 32 for inserting the rack 63 is provided on the tunnel surface 3, and a positioning groove 44 for inserting the rack 63 is also provided on the filter plate 43. First magnetic pieces 64 are fixed to both ends of the rack 63, a second magnetic piece 33 for attracting the first magnetic piece 64 is fixed to the bottom of the limiting groove 32, and a third magnetic piece for attracting the first magnetic piece 64 is fixed to the bottom of the positioning groove 44.

[0053] Reference Figure 3 The control mechanism 5 includes a support plate 51 fixed to the wall of the placement slot 31. A turntable 52 is rotatably connected to the side wall of the support plate 51, and the rotation axis of the turntable 52 is set along the width direction of the storage box 4. A connecting rod 53 is rotatably connected to the side of the turntable 52 away from the support plate 51. A limit plate 54 is fixed on the side wall of the filter plate 43, and the end of the connecting rod 53 away from the turntable 52 is rotatably connected to the limit plate 54.

[0054] Reference Figure 3 as well as Figure 4 An installation slot 34, communicating with the placement slot 31, is also provided on the tunnel surface 3. A drive motor 7 is fixed at the bottom of the installation slot 34, and the drive motor 7 is also communicatively connected to the wireless control terminal 2. The drive motor 7 can be a servo motor and has a built-in corresponding program to execute the control commands sent by the wireless control terminal 2. A connecting component 8 is provided on the drive motor 7, which is used to control the drive motor 7 to drive the connecting rod 61 or the turntable 52 to rotate.

[0055] Reference Figure 4 as well as Figure 5 To control the rotation of the connecting rod 61, the connecting assembly 8 includes a sliding sleeve 81 sleeved on the output shaft of the drive motor 7. A second keyway 811 is formed on the inner wall of the sliding sleeve 81, and a second connecting key 71, which mates with the second keyway 811, is fixed on the output shaft of the drive motor 7. A drive cylinder 82 is also fixedly installed inside the tunnel surface 3. One end of the piston rod of the drive cylinder 82, which passes through the mounting groove 34, is rotatably connected to the sliding sleeve 81. The drive cylinder 82 is also communicatively connected to the wireless control terminal 2 and has a built-in program to execute control commands sent by the wireless control terminal 2. A second bevel gear 84 is fixed on the outer circumference of the sliding sleeve 81. A limiting sleeve 85 is rotatably connected to the wall of the placement groove 31. A first keyway 851 is formed on the inner wall of the limiting sleeve 85. A first connecting key 611, which mates with the first keyway 851, is fixed on the connecting rod 61. A first bevel gear 83, which meshes with the second bevel gear 84, is coaxially fixed at the end of the limiting sleeve 85 away from the connecting rod 61.

[0056] During operation, the sliding sleeve 81 can be slid on the output shaft of the drive motor 7 by adjusting the drive cylinder 82, causing the first bevel gear 83 and the second bevel gear 84 to mesh. Further adjustment of the drive motor 7 causes its output shaft to rotate, rotating the sliding sleeve 81. Because the first bevel gear 83 and the second bevel gear 84 are meshing, the rotation of the first bevel gear 83 causes the limiting sleeve 85 to rotate, which in turn causes the connecting rod 61 to rotate. The rotation of the connecting rod 61 causes the spur gear 62 to rotate, and under the action of the meshing of the spur gear 62 and the rack 63, the rack 63 can slide on the storage box 4. When the rack 63 slides upward, the first magnetic piece 64 at the top of the rack 63 engages with the second magnetic piece 33 in the limiting groove 32, and the first magnetic piece 64 at the bottom of the rack 63 is not in the filter plate 43, thus limiting the relative position between the storage box 4 and the tunnel surface 3, so that the filter plate 43 can slide within the storage box 4; when the rack 63 slides downward, the first magnetic piece 64 at the bottom of the rack 63 engages with the third magnetic piece in the positioning groove 44, and the first magnetic piece 64 at the top of the rack 63 is not in the tunnel surface 3, thus limiting the relative position between the storage box 4 and the filter plate 43, so that the storage box 4 can be shaken as a whole by adjusting the filter plate 43.

[0057] Reference Figure 3 as well as Figure 5 To control the rotation of the turntable 52, the connecting assembly 8 also includes a fourth bevel gear 87 fixed to the sliding sleeve 81. A second pulley is rotatably connected to the wall of the mounting groove 34, and a third bevel gear 86, which meshes with the fourth bevel gear 87, is coaxially fixed to the second pulley. A first pulley 88 is coaxially fixed to the turntable 52, and the first pulley 88 and the second pulley are connected by a synchronous belt 881.

[0058] During operation, the sliding sleeve 81 can be slid on the output shaft of the drive motor 7 by adjusting the drive cylinder 82, so that the third bevel gear 86 and the fourth bevel gear 87 mesh. Then, the drive motor 7 is adjusted, and the output shaft of the drive motor 7 rotates, causing the sliding sleeve 81 to rotate. Since the third bevel gear 86 and the fourth bevel gear 87 are meshed, the rotation of the third bevel gear 86 drives the second pulley to rotate, the second pulley drives the first pulley 88 to rotate, and then the turntable 52 rotates. The rotation of the turntable 52 drives the connecting rod 53 to move, so as to realize the reciprocating sliding of the entire storage box 4 or the filter plate 43.

[0059] Reference Figure 2 as well as Figure 3 The wireless control terminal 2 can pre-divide the tunnel surface according to the location of each storage box 4 in the acquired image and obtain the corresponding division area. Based on the division area corresponding to the smoke in the acquired image sent by the image acquisition terminal 1, it can send control commands to the heating plate 41, drive motor 7 and drive cylinder 82 of the corresponding division area.

[0060] Reference Figure 3 In order to reduce the possibility of the corrugated pipe 91 breaking due to the movement of the storage box 4, a feed pipe 9 is installed on the side wall of the storage box 4. The end of the feed pipe 9 away from the storage box 4 is fixed with the corrugated pipe 91, and the end of the corrugated pipe 91 away from the storage box 4 is fixed to the tunnel surface 3.

[0061] The implementation principle of the intelligent tunnel fire prevention system in this application embodiment is as follows: The image acquisition terminal 1 sends the acquired image to the wireless control terminal 2. When the wireless control terminal 2 detects smoke or flames in the tunnel, it sends a control command to the heating plate 41, causing the heating plate 41 to heat the flame-retardant capsule in the storage box 4. At the same time, the wireless control terminal 2 sends a control command to the drive motor 7 and the drive cylinder 82. The drive cylinder 82 drives the sliding sleeve 81 to move upward, so that the first bevel gear 83 and the second bevel gear 84 mesh. Then, the drive motor 7 is adjusted, and the output shaft of the drive motor 7 rotates, causing the sliding sleeve 81 to rotate. Since the first bevel gear 83 and the second bevel gear 84 are meshed, the rotation of the first bevel gear 83 causes the limiting sleeve 85 to rotate, and the rotation of the limiting sleeve 85 causes the connecting rod 61 to rotate. The connecting rod 61 rotates and the spur gear 62 rotates. Under the action of the meshing of the spur gear 62 and the rack 63, the rack 63 slides upward, and the first magnetic piece 64 at the top of the rack 63 is attracted to the second magnetic piece 33 in the limiting groove 32. Subsequently, the drive cylinder 82 is adjusted so that the third bevel gear 86 and the fourth bevel gear 87 mesh. The rotation of the third bevel gear 86 drives the second pulley to rotate, which in turn drives the first pulley 88 to rotate, thereby rotating the turntable 52. The rotation of the turntable 52 drives the connecting rod 53 to move, so that the filter plate 43 can slide in the storage box 4, making the through hole and the filter hole connected. The flame-retardant gas can be released from the storage box 4 into the tunnel to achieve rapid extinguishing of the fire source in the tunnel.

[0062] Example 2:

[0063] A control method includes the following steps:

[0064] Step 100: Image acquisition terminal 1 periodically takes pictures of the tunnel to obtain acquired images and sends the acquired images to wireless control terminal 2;

[0065] During implementation, image acquisition terminal 1 periodically takes and records videos of the tunnel to obtain captured images. The period can be 10 minutes, 1 hour, or 3 hours. Image acquisition terminal 1 then sends the captured images to wireless control terminal 2.

[0066] Step 200: Wireless control terminal 2 acquires the acquired image uploaded by image acquisition terminal 1.

[0067] During implementation, the wireless control terminal 2 acquires the images uploaded by the image acquisition terminal 1.

[0068] Step 300: Wireless control terminal 2 extracts smoke features from the acquired image according to a preset smoke model.

[0069] The wireless control terminal 2 is pre-set with a smoke model. The wireless control terminal 2 performs simulation training based on training samples, which can be pictures of various types of smoke, to obtain the corresponding smoke model.

[0070] During implementation, the wireless control terminal 2 extracts smoke features from the acquired images based on the smoke model. Smoke features can include the edge contour of the smoke in the image, the amount of smoke, the color of the smoke, etc.

[0071] Step 400: Wireless control terminal 2 generates the smoke coverage area based on the smoke characteristics;

[0072] During implementation, the wireless control terminal 2 generates the smoke coverage area based on the edge contour of the smoke characteristics.

[0073] Step 500: Wireless control terminal 2 determines whether the smoke coverage area exceeds the preset dense smoke coverage threshold.

[0074] Among them, the wireless control terminal 2 is also preset with a smoke coverage threshold. The smoke coverage threshold is the proportion of smoke in the acquired image. The specific proportion can be 10%, 20%, or 30%.

[0075] During implementation, the wireless control terminal 2 determines whether the smoke coverage area exceeds the dense smoke coverage threshold.

[0076] In step 600, if the wireless control terminal 2 detects that the temperature exceeds the limit, it sends a pre-stored control command to the heating plate 41 to raise the temperature of the heating plate 41.

[0077] The wireless control terminal 2 also stores control commands in advance, which are used to control the heating plate 41, the drive motor 7 and the drive cylinder 82 to perform corresponding actions.

[0078] During implementation, if the wireless control terminal 2 detects that the smoke coverage area exceeds the preset dense smoke coverage threshold, it sends a pre-stored control command to the heating plate 41, the drive motor 7 and the drive cylinder 82 to make the heating plate 41 heat up and release the flame-retardant gas from the storage box 4.

[0079] Optionally, to improve monitoring of areas far from image acquisition terminal 1, the acquired images obtained by the wireless control mid-segment also carry the acquisition time. Before step 500, the following is also included:

[0080] Among them, the wireless control terminal 2 is preset with a change trend threshold, which can be 5%, 10%, or 15%.

[0081] During implementation, the wireless control terminal 2 determines the smoke coverage area (i.e., the target smoke coverage area) corresponding to each time node in the acquisition time, and obtains the range change of the smoke area at adjacent time nodes based on the target smoke coverage area. If the wireless control terminal 2 detects that the range change exceeds a preset trend threshold, it sends a pre-stored control command to the heating plate 41, the drive motor 7, and the drive cylinder 82 to heat the heating plate 41 and release the flame-retardant gas from the storage box 4.

[0082] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An intelligent tunnel fire prevention system, characterized in that, include: A storage box is slidably installed below the tunnel surface. The storage box contains flame-retardant capsules, and a through hole is provided on the top of the storage box. A heating plate is installed inside the storage box; Image acquisition terminal, installed inside the tunnel; The wireless control terminal is communicatively connected to both the heating plate and the image acquisition terminal. The wireless control terminal responds to the acquired image output by the image acquisition terminal and controls the heating plate to heat up, so that the flame-retardant capsule releases flame-retardant gas into the tunnel through the through hole after being heated. A through groove is provided on the side wall of the storage box, and a filter plate is slidably arranged in the through groove. The filter plate has filter holes. A through hole for communicating with the filter holes is provided on the top of the storage box. The storage box is provided with a control mechanism for controlling the relative sliding of the filter plate and the storage box. The storage box is also provided with a limiting mechanism for limiting the relative position of the filter plate and the storage box. The limiting mechanism includes a rack that passes through the storage box, a connecting rod that is rotatably connected to the storage box, a spur gear that meshes with the rack that is coaxially fixed on the connecting rod, a limiting groove for inserting the rack is opened on the surface of the tunnel, and a positioning groove for inserting the rack is also opened on the filter plate. The control mechanism includes a turntable rotatably connected to the tunnel surface, a connecting rod rotatably connected to the turntable, and a limiting plate fixed to the side wall of the filter plate and rotatably connected to the connecting rod.

2. The intelligent tunnel fire prevention system according to claim 1, characterized in that: An installation slot is provided in the surface of the tunnel, and a drive motor is installed in the installation slot. The drive motor is equipped with a connecting component, which is used to control the rotation of the connecting rod or the turntable.

3. The intelligent tunnel fire prevention system according to claim 2, characterized in that: The connecting assembly includes a limiting sleeve rotatably connected to the tunnel surface. A first keyway is formed on the inner wall of the limiting sleeve. A first connecting key, cooperating with the first keyway, is fixed on the connecting rod. A first bevel gear is coaxially fixed to the end of the limiting sleeve away from the connecting rod. A sliding sleeve is fitted onto the output shaft of the drive motor. A second keyway is formed on the inner wall of the sliding sleeve. A second connecting key, cooperating with the second keyway, is fixed on the output shaft of the drive motor. A second bevel gear, meshing with the first bevel gear, is fixed on the sliding sleeve. A first pulley is coaxially fixed on the turntable. A second pulley is rotatably connected to the wall of the mounting groove. The first and second pulleys are connected by a synchronous belt. A third bevel gear is coaxially fixed to the second pulley. A fourth bevel gear, meshing with the third bevel gear, is fixed on the sliding sleeve. A drive cylinder is also installed inside the tunnel surface. One end of the piston rod of the drive cylinder, which passes through the mounting groove, is rotatably connected to the sliding sleeve.

4. The intelligent tunnel fire prevention system according to claim 1, characterized in that: The rack has a first magnetic piece fixed at both ends, the bottom of the limiting groove has a second magnetic piece for attracting the first magnetic piece, and the bottom of the positioning groove has a third magnetic piece for attracting the first magnetic piece.

5. The intelligent tunnel fire prevention system according to claim 1, characterized in that: The storage tank is equipped with a feed pipe, and a corrugated pipe is fixed to the end of the feed pipe away from the storage tank. The end of the corrugated pipe away from the storage tank is fixed to the tunnel surface.

6. A control method, characterized in that, The method is based on the intelligent tunnel fire protection system according to any one of claims 1 to 5, comprising: The wireless control terminal acquires the images uploaded by the image acquisition terminal, which are obtained by the image acquisition terminal periodically taking pictures of the tunnel. The wireless control terminal extracts smoke features from the acquired image based on a preset smoke model. The wireless control terminal generates the smoke coverage area based on the smoke characteristics; If the wireless control terminal detects that the smoke coverage area exceeds a preset dense smoke coverage threshold, it sends a pre-stored control command to the heating plate to raise the temperature of the heating plate.

7. The control method according to claim 6, characterized in that: The acquired images carry the acquisition time; Before the wireless control terminal determines whether the smoke coverage area exceeds a preset dense smoke coverage threshold, the method further includes: The wireless control terminal determines the target smoke coverage area corresponding to each time node in the acquisition time. The wireless control terminal obtains the range change of adjacent time nodes based on the target smoke coverage area; If the wireless control terminal detects that the range change exceeds a preset trend threshold, it sends a pre-stored control command to the heating plate to raise the temperature of the heating plate.

Images