Coal conveying trestle fire extinguishing device

Abstract

The invention relates to the technical field of coal conveying trestle fire extinguishing, in particular to a coal conveying trestle fire extinguishing device which comprises a plurality of fire extinguishing mechanisms, the fire extinguishing mechanisms are evenly installed on the inner wall of a coal conveying trestle and used for conducting fire extinguishing treatment on ignition points in different places, and each fire extinguishing mechanism is composed of a spraying assembly and a liquid supply assembly. And the liquid supply assembly is installed on one side of the spraying assembly, the spraying assembly is used for spraying foam to an ignition point in a reciprocating mode, the liquid supply assembly is used for continuously transporting foam liquid for fire extinguishing into the spraying assembly, and under the synergistic effect of the spraying assembly, the liquid supply assembly and the cleaning assembly, the foam liquid is sprayed to the ignition point in a reciprocating mode. And compared with a traditional tap water downward irrigation spraying mode, foam is sprayed in a reciprocating mode, the effects of being more efficient, more accurate and safer are achieved, and the device is more suitable for fire extinguishing treatment in the coal conveying trestle.

Description

Technical Field

[0001] The invention relates to the technical field of fire extinguishing for coal conveying trestle bridges, and in particular to a fire extinguishing device for coal conveying trestle bridges. Background Art

[0002] According to existing data, when extinguishing a fire on a coal transport trestle, it is necessary to use fire extinguishers to extinguish the fire from both ends to the middle, and at the same time use sand and soil to cover and isolate both sides of the fire point to prevent the fire from spreading outward from both sides, which can effectively suppress the fire.

[0003] When a fire occurs during the coal conveyor belt transportation, the coal conveyor trestle's own safety system will immediately cut off the belt's power system, causing it to stop transporting coal, and activate the fire extinguishing device to connect multiple sprinklers to spray water over a large area inside the coal conveyor trestle to extinguish the fire, thereby achieving the effect of cooling and extinguishing the fire. When encountering a larger fire, firefighters will need to be arranged to enter and use sprinklers to extinguish the fire manually.

[0004] The existing fire extinguishing device extinguishes fire over a large area by activating a sprinkler. On the one hand, it cannot quickly block the spread of the fire, resulting in poor fire extinguishing effect. On the other hand, large-area water spraying will cause serious water accumulation inside the coal conveyor trestle, causing damage to a large number of electrical equipment in the coal conveyor trestle and reducing the quality of coal. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies mentioned in the above background technology and provide a coal handling trestle fire extinguishing device.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solution: a coal conveying trestle fire extinguishing device, comprising:

[0007] A fire extinguishing mechanism, wherein the fire extinguishing mechanism is provided in plurality and evenly installed on the inner wall of the coal conveying trestle for extinguishing fires at different locations;

[0008] The fire extinguishing mechanism is composed of a spraying assembly and a liquid supply assembly, and the liquid supply assembly is installed on one side of the spraying assembly; the spraying assembly is used to reciprocately spray foam on the fire point, and the liquid supply assembly is used to continuously transport the foam liquid for fire extinguishing into the spraying assembly;

[0009] A cleaning assembly, which is installed at the bottom of the spray assembly and is used to automatically clean the blocked water spray holes on the spray assembly;

[0010] The temperature sensor is fixedly mounted at the bottom of the spraying assembly and connected to an external controller to monitor temperature changes within its spraying range.

[0011] Optionally, the spraying assembly includes a foam box fixedly installed on the inner wall of the coal conveyor trestle. A motor is fixedly connected to the top of the foam box. The output shaft of the motor penetrates through the top of the inner cavity of the foam box and is fixedly connected to a rotating rod. A cross-shaped stirring frame is fixedly sleeved on the rod body of the rotating rod located in the inner cavity of the foam box. Two diversion pipes for guiding the outflow of the foam liquid are connected through the bottom of the foam box. Both of the two diversion pipes are connected through a spraying box for spraying the foam liquid.

[0012] Optionally, the spraying assembly further includes two fixing blocks fixedly connected to the lower surface of the foam box. A rotating shaft is rotatably connected to one side of the fixing block close to the bottom end. The bottom end of the rotating rod penetrates through the bottom of the inner cavity of the foam box and is fixedly sleeved with a toothed ring. A sealing ring for enhancing the sealing effect is sleeved on the rod body of the rotating rod penetrating through the bottom of the foam box, and the outer ring of the sealing ring is fixedly connected to the foam box. Rack teeth are meshed and connected to both opposite sides of the toothed ring. A limiting block for limiting the toothed ring and the rack teeth is further fixedly installed on the lower surface of the foam box. The shape of the limiting block is U-shaped, and the inner walls are respectively in fit connection with the toothed ring and the rack teeth. U-shaped grooves are respectively formed at the opposite ends of the two rack teeth, and a connecting sleeve is rotatably connected in the U-shaped groove. A piston shaft is piston-connected in the connecting sleeve, and the piston shaft penetrates and connects the rotating shaft.

[0013] Optionally, the length of the diversion pipe is adapted to the reciprocating swing angle of the spraying box.

[0014] Optionally, the liquid supply assembly includes a liquid mixing box fixedly connected to one side of the foam box, and the water outlet pipe of the liquid mixing box penetrates through one side of the inner cavity of the foam box. The top of the liquid mixing box is respectively connected through a first liquid delivery pipe and a second liquid delivery pipe for transporting water and foam liquid. Solenoid valves connected to an external controller are arranged in both the first liquid delivery pipe and the second liquid delivery pipe.

[0015] Optionally, the liquid supply assembly further includes two small water pumps fixedly connected to the bottom of the inner cavity of the foam box. The drainage ports of the two small water pumps are respectively connected to the water inlet ends of the corresponding diversion pipes.

[0016] Optionally, the cleaning assembly includes a protective cover fixedly connected to the lower surface of the spraying assembly. Two magnetic blocks corresponding to the reciprocating swing position of the spraying box are arranged on the inner wall of the protective cover, and the magnetic poles of the two magnetic blocks are opposite. A cleaning block for cleaning the water spraying holes is in fit connection with the water spraying side of the spraying box. Two limiting shafts are further fixedly connected to the water spraying side of the spraying box. The two limiting shafts penetrate through the cleaning block and are slidably connected to the cleaning block. The cleaning block is made of a magnetic material.

[0017] Optionally, the cleaning assembly further includes a brush block, which is embedded on the side of the cleaning block opposite to the spraying box to improve the cleaning effect of the water spraying holes when the cleaning block moves.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] In this coal conveying trestle fire extinguishing device, a plurality of fire extinguishing mechanisms are evenly installed on the inner wall of the coal conveying trestle, so that when a fire breaks out at any location in the coal conveying trestle, it can quickly respond and carry out fire extinguishing treatment. When the fire extinguishing mechanism extinguishes the fire, first, the temperature sensor senses the temperature of the ignition point in the coal conveying trestle and sends a signal to the external controller, facilitating the rapid response of the supervision personnel. Subsequently, the external controller will automatically control the spraying assembly to repeatedly spray and cover the foam on both sides and the center of the ignition point, thereby suppressing the fire. At the same time, the liquid supply assembly will continuously supply the foam for fire extinguishing into the spraying assembly, achieving the effect of continuous spraying and extinguishing. Meanwhile, while the cleaning assembly reciprocally sprays the foam on the spraying assembly, it synchronously cleans the spraying holes, keeping the water spraying holes on the spraying assembly continuously unobstructed, ensuring that the foam in the spraying assembly can continuously and evenly spray near the ignition point. Finally, under the synergistic effect of the spraying assembly, the liquid supply assembly and the cleaning assembly, it can achieve a rapid response and fire extinguishing treatment for the ignition points in various places in the coal conveying trestle. The reciprocating spraying of foam has a more efficient, accurate and safe effect compared with the traditional method of downward irrigation spraying with tap water, and is more suitable for fire extinguishing treatment in the coal conveying trestle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 is a partial sectional structure schematic diagram of the present invention;

[0023] Figure 3 is a schematic diagram of the internal structure of the foam box and the protective cover in the present invention.

[0024] Figure 4 is a partial sectional structure schematic diagram of the protective cover in the present invention;

[0025] Figure 5 is a schematic diagram of the structure at the rotating rod, gear ring and rack in the present invention;

[0026] Figure 6 is a schematic diagram of the structure at the connecting sleeve, spraying box and diversion pipe in the present invention;

[0027] Figure 7 is a partial sectional structure schematic diagram of the foam box in the present invention;

[0028] Figure 8 This is a schematic structural diagram of the limit shaft, cleaning block, and brush block in the present invention.

[0029] The meanings of the reference numerals in the figure are as follows:

[0030] 1. Spraying assembly; 10. Foam box; 11. Motor; 12. Rotating rod; 121. Cross-shaped stirring frame; 122. Sealing ring; 13. Gear ring; 131. Limit block; 14. Rack; 15. Connecting sleeve; 16. Piston shaft; 17. Rotating shaft; 18. Fixed block; 19. Spraying box; 191. Diversion pipe; 2. Liquid supply assembly; 20. Mixing liquid box; 21. First infusion pipe; 22. Second infusion pipe; 23. Small water pump; 3. Cleaning assembly; 30. Protective cover; 31. Magnetic block; 32. Limit shaft; 33. Cleaning block; 34. Brush block; 4. Temperature sensor. Detailed implementation manners

[0031] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0032] Please refer to Figures 1 - 8 , the present invention details the above technical solutions through the following embodiments: A coal conveying trestle fire extinguishing device includes:

[0033] Fire extinguishing mechanisms, there are multiple of the fire extinguishing mechanisms, and they are evenly installed on the inner wall of the coal conveying trestle for extinguishing fires at different locations;

[0034] The fire extinguishing mechanism is composed of a spraying assembly 1 and a liquid supply assembly 2, and the liquid supply assembly 2 is installed on one side of the spraying assembly 1; the spraying assembly 1 is used for reciprocally spraying foam at the fire point, and the liquid supply assembly 2 is used for continuously transporting the foam liquid for fire extinguishing into the spraying assembly 1;

[0035] A cleaning assembly 3, the cleaning assembly 3 is installed at the bottom of the spraying assembly 1 and is used for automatically cleaning the blocked water spraying holes on the spraying assembly 1.

[0036] A temperature sensor 4, the temperature sensor 4 is fixedly installed at the bottom of the spraying assembly 1 and is connected to an external controller for monitoring the temperature change within its spraying range.

[0037] Further, please refer to Figures 1 - 2As shown in the figure, the spraying assembly 1 includes a foam box 10 fixedly installed on the inner wall of the coal conveying trestle. The top of the foam box 10 is fixedly connected with a motor 11. The output shaft of the motor 11 penetrates through the top of the inner cavity of the foam box 10 and is fixedly connected with a rotating rod 12. A cross-shaped stirring frame 121 is sleeved and fixed on the rod body of the rotating rod 12 located in the inner cavity of the foam box 10. Two diversion pipes 191 for guiding the outflow of the foam liquid are connected through the bottom of the foam box 10. Both of the two diversion pipes 191 are connected through with a spraying box 19 for spraying the foam liquid.

[0038] First, install multiple fire extinguishing mechanisms in the coal conveying trestle. This mechanism adopts the foam fire extinguishing principle. Compared with direct water spraying, foam fire extinguishing has the advantages of reducing the temperature of the fire source, inhibiting the volatilization of toxic gases, and covering and isolating the spread of the fire. Moreover, the inert gas released during the evaporation of the foam will also dilute the oxygen concentration in the coal conveying trestle, thereby achieving the effect of reducing the increase in the fire.

[0039] When a fire breaks out, the temperature sensors 4 installed at the bottom of multiple spraying assemblies 1 will first sense the change in the surrounding temperature. When the temperature is higher than the warning value, a signal is sent to notify the external controller to start the fire extinguishing mechanism at the corresponding fire point for fire extinguishing. When the fire extinguishing mechanism is extinguishing the fire, the liquid supply assembly 2 will introduce the foam liquid required for the spraying assembly 1 into the foam box 10. At the same time, the motor 11 is started, and the cross-shaped stirring frame 121 is driven to rotate through the output shaft, so as to stir the foam liquid flowing into the inner cavity of the foam box 10, generate a large amount of foam required for fire extinguishing, and under the action of pressure, it is introduced into the spraying box 19 through the diversion pipe 191 connected through the inner cavity of the foam box 10. Finally, the two spraying boxes 19 spray the foam from both sides of the fire point, effectively covering both sides of the fire point, preventing the fire from spreading quickly from both sides, reducing the spread speed of the fire. Compared with the traditional fire extinguishing device that sprays water to extinguish the fire, it can quickly block the spread of the fire source and avoid a larger fire. With the cooperation of the temperature sensor 4, this fire extinguishing mechanism can also effectively and accurately extinguish the fire and avoid huge losses caused by a large amount of accumulated water in the trestle.

[0040] Further, please refer to Figures 1 - 3As shown, the spraying assembly 1 further includes two fixing blocks 18 fixedly connected to the lower surface of the foam box 10. One side of the fixing block 18 near the bottom is rotatably connected to a rotating shaft 17. The bottom end of the rotating rod 12 penetrates through the bottom of the inner cavity of the foam box 10 and is sleeved and fixed with a toothed ring 13. A sealing ring 122 for enhancing the sealing effect is sleeved on the rod body of the rotating rod 12 penetrating through the bottom of the foam box 10, and the outer ring of the sealing ring 122 is fixedly connected to the foam box 10. Both opposite sides of the toothed ring 13 are meshed with a rack 14. The lower surface of the foam box 10 is further fixedly installed with a limiting block 131 for limiting the toothed ring 13 and the rack 14. The shape of the limiting block 131 is U-shaped, and the inner walls are respectively in contact with the toothed ring 13 and the rack 14. U-shaped grooves are respectively formed at the opposite ends of the two racks 14, and a connecting sleeve 15 is rotatably connected in the U-shaped groove. A piston shaft 16 is piston-connected in the connecting sleeve 15, and one end of the piston shaft 16 penetrates through and rotates the fixed rotating shaft 17. The temperature sensor 4 is fixedly connected to the lower surface of the limiting block 131.

[0041] When the rotating rod 12 rotates driven by the output shaft of the motor 11, the toothed ring 13 fixedly sleeved at its bottom end will rotate synchronously therewith, and drive the two racks 14 meshed therewith to move in opposite or away directions according to the forward and reverse rotation directions of the toothed ring 13. When the rack 14 moves, it will drive the connecting sleeve 15 rotatably connected thereto to deflect. Also, due to the influence of the limiting effect of the rotating shaft 17 on the piston shaft 16, the piston shaft 16 is further promoted to perform telescopic movement under the deflection movement of the connecting sleeve 15 and deflect synchronously with the connecting sleeve 15, finally realizing driving the spraying box 19 to swing left and right reciprocally, so that the sprayed foam can evenly cover both sides of the fire point and the fire source, thereby achieving the effect of isolating and extinguishing the fire, and solving the problems that the traditional fire extinguishing device is difficult to quickly block the spread of the fire source and cannot concentrate on extinguishing the fire source.

[0042] Further, please refer to Figure 3 As shown, the length of the diversion pipe 191 is adapted to the reciprocating swing angle of the spraying box 19.

[0043] Through the above settings, the problem that the length of the diversion pipe 191 is insufficient when the piston shaft 16 drives the spraying box 19 to swing reciprocally is avoided, and it better adapts to the reciprocating swing of the mechanical structure of the spraying assembly 1.

[0044] Further, please refer to Figure 1 and Figure 7As shown in the figure, the liquid supply assembly 2 includes a liquid mixing box 20 fixedly connected to one side of the foam box 10, and the water outlet pipe of the liquid mixing box 20 penetrates through one side of the inner cavity of the foam box 10. The top of the liquid mixing box 20 is respectively connected with a first liquid delivery pipe 21 for transporting water and a second liquid delivery pipe 22 for transporting foam liquid. Solenoid valves connected to an external controller are arranged in both the first liquid delivery pipe 21 and the second liquid delivery pipe 22.

[0045] When the spraying assembly 1 continuously sprays foam for fire extinguishing, the first liquid delivery pipe 21 and the second liquid delivery pipe 22 in the liquid supply assembly 2 will introduce water and foam liquid as needed into the inner cavity of the foam box 10 through the liquid mixing box 20. After being stirred by the cross-shaped stirring frame 121 to produce foam, the foam is sprayed out through the diversion pipe 191 and the spraying box 19. Finally, it cooperates with the spraying assembly 1 to form a complete fire extinguishing process, achieving a more automated effect without the need for manual addition of raw materials for generating foam.

[0046] Further, please refer to Figure 2 and Figure 7 As shown in the figure, the liquid supply assembly 2 further includes two small water pumps 23 fixedly connected to the bottom of the inner cavity of the foam box 10. The drainage ports of the two small water pumps 23 are respectively connected to the water inlet ends of the corresponding diversion pipes 191.

[0047] By arranging small water pumps 23 at the bottom of the inner cavity of the foam box 10 and connecting the small water pumps 23 to the diversion pipes 191, the effect of quickly pumping the foam in the foam box 10 into the diversion pipes 191 can be achieved, solving the problem of slow foam flow rate.

[0048] Further, please refer to Figure 2 、 Figure 6 and Figure 8 As shown in the figure, the cleaning assembly 3 includes a protective cover 30 fixedly connected to the lower surface of the spraying assembly 1. Two magnetic blocks 31 corresponding to the reciprocating swing position of the spraying box 19 are arranged on the inner wall of the protective cover 30, and the magnetic poles of the two magnetic blocks 31 are opposite. A cleaning block 33 for cleaning the water spraying holes is attached to the water spraying side of the spraying box 19. Two limiting shafts 32 are also fixedly connected to the water spraying side of the spraying box 19. The two limiting shafts 32 penetrate through the cleaning block 33 and are slidably connected to the cleaning block 33. The cleaning block 33 is made of a magnetic material.

[0049] By cleaning the settings of component 3, when the spraying box 19 is driven by the piston shaft 16 to swing back and forth, it will cycle through two corresponding magnetic blocks 31. Also, since the cleaning block 33 is made of magnetic material and is slidably connected to the limiting shaft 32, it can be known that when the spraying box 19 drives the cleaning block 33 to approach magnetic blocks 31 with different magnetic properties during the swinging process, the cleaning block 33 will be respectively subjected to the magnetic attraction and magnetic repulsion forces generated by the two magnetic blocks 31 on it, thereby prompting the cleaning block 33 to move back and forth on the limiting shaft 32, so as to achieve the effect of cleaning and dredging the water spray holes on the surface of the spraying box 19 and avoid blockage problems during long-term use.

[0050] Further, please refer to Figures 1 - 3 As shown, the cleaning component 3 further includes a brush block 34, and the brush block 34 is embedded on the side of the cleaning block 33 facing the spraying box 19, and is used to improve the cleaning effect of the water spray holes when the cleaning block 33 moves.

[0051] By embedding and installing the brush block 34 on the inner wall of the side of the cleaning block 33 facing the spraying box 19, and taking advantage of the better cleaning effect of the brush on the brush block 34, the water spray holes of the diversion pipe 191 can be deeply cleaned and dredged when the cleaning block 33 moves. At the same time, the split installation of the brush block 34 and the cleaning block 33 also achieves the effect of facilitating the replacement of the brush block 34 at any time, further enhancing the cleaning effect of the cleaning component 3.

[0052] The working principle of a coal conveying trestle fire extinguishing device in this embodiment is as follows: when a fire breaks out in the coal conveying trestle, the fire extinguishing mechanism installed at the corresponding fire point position will transmit the suddenly increased temperature signal to the external controller through the temperature sensor 4 in its own spraying component 1 to alert relevant personnel for inspection. When the temperature rises to the warning value, the first infusion pipe 21 and the second infusion pipe 22 in the liquid supply component 2 will respectively pass a certain proportion of water and foam liquid into the mixing box 20 through the solenoid valve. Subsequently, after preliminary mixing, it is passed into the foam box 10 for the spraying component 1 to process it and generate foam for use;

[0053] Meanwhile, the motor 11 inside the spraying assembly 1 starts to drive the rotating rod 12 to rotate, and drives the cross-shaped stirring frame 121 to stir the foam liquid and water in the foam box 10 to generate foam, and then sprays it out through the diversion pipe 191 and the spraying box 19 on both sides of the ignition point, so as to achieve the effect of covering the foam on both sides of the ignition point to prevent the fire from spreading from both sides. Among them, as the rotating rod 12 rotates, it will drive the toothed ring 13 at the bottom to rotate synchronously, and then drive the two racks 14 meshed with it to move in opposite or opposite directions. When the rack 14 moves, the connecting sleeve 15 rotating with it will perform a reciprocating deflection movement within the opposite angle. During this process, the connecting sleeve 15 and the piston shaft 16 perform a piston movement, and drive the spraying box 19 to spray foam evenly left and right reciprocally towards the ignition point and both sides of the ignition point through the piston shaft 16 and the rotating shaft 17 rotatably connected to the fixed block 18, increasing the foam coverage area and enhancing the foam isolation effect, and finally achieving the effect of enhancing the fire extinguishing effect of the fire extinguishing mechanism;

[0054] Among them, during the process of the piston shaft 16 driving the spraying box 19 to swing left and right reciprocally, it will intermittently pass through two magnetic blocks 31 with opposite magnetic poles. When the spraying box 19 drives the cleaning block 33 to approach different magnetic blocks 31 during the swing process, the cleaning block 33 will be respectively subjected to the magnetic attraction force and magnetic repulsion force generated by the two magnetic blocks 31 on it, and then promote the cleaning block 33 to move reciprocally on the limiting shaft 32, so as to achieve the effect of cleaning and dredging the water spray holes on the surface of the spraying box 19 and avoid the problem of blockage during long-term use;

[0055] In addition, taking advantage of the better cleaning effect of the brush block 34 embedded in the cleaning block 33, when the cleaning block 33 moves, it can deeply clean and dredge the water spray holes of the diversion pipe 191. At the same time, the split installation of the brush block 34 and the cleaning block 33 also achieves the effect of facilitating the replacement of the brush block 34 at any time, further enhancing the cleaning effect of the cleaning assembly 3.

[0056] It should be noted that if there are directional indications such as up, down, left, right, front, back... in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0057] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, such descriptions of "first", "second", etc. are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, "a plurality of" means two or more. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0058] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims within the present invention.

Claims

1. A coal conveying trestle fire extinguishing device, characterized in that, Including: Fire extinguishing mechanisms, a plurality of which are evenly installed on the inner wall of the coal conveyor trestle for extinguishing fires at different locations; The fire extinguishing mechanism is composed of a spraying component (1) and a liquid supply component (2), and the liquid supply component (2) is installed on one side of the spraying component (1); the spraying component (1) is used for reciprocally spraying foam at the fire point, and the liquid supply component (2) is used for continuously transporting the foam liquid for fire extinguishing into the spraying component (1); A cleaning component (3) is installed at the bottom of the spraying component (1) for automatically cleaning the blocked water spraying holes on the spraying component (1); A temperature sensor (4) is fixedly installed at the bottom of the spraying component (1) and is connected to an external controller for monitoring the temperature change within its spraying range.

2. The coal conveying trestle fire extinguishing device according to claim 1, characterized in that: The spraying component (1) includes a foam box (10) fixedly installed on the inner wall of the coal conveyor trestle. A motor (11) is fixedly connected to the top of the foam box (10). The output shaft of the motor (11) penetrates through the top of the inner cavity of the foam box (10) and is fixedly connected to a rotating rod (12). A cross-shaped stirring frame (121) is fixedly sleeved on the rod body of the rotating rod (12) located in the inner cavity of the foam box (10). Two flow guide pipes (191) for guiding the outflow of the foam liquid are connected through the bottom of the foam box (10). Both of the two flow guide pipes (191) are connected through a spraying box (19) for spraying the foam liquid.

3. The coal conveying trestle fire extinguishing device according to claim 2, characterized in that: The spraying component (1) further includes two fixing blocks (18) fixedly connected to the lower surface of the foam box (10). A rotating shaft (17) is rotatably connected to one side of the fixing block (18) near the bottom end. The bottom end of the rotating rod (12) penetrates through the bottom of the inner cavity of the foam box (10) and is fixedly sleeved with a toothed ring (13). A sealing ring (122) for enhancing the sealing effect is sleeved on the rod body of the rotating rod (12) penetrating through the bottom of the foam box (10), and the outer ring of the sealing ring (122) is fixedly connected to the foam box (10). Both opposite sides of the toothed ring (13) are meshed with a rack (14). A limiting block (131) for limiting the toothed ring (13) and the rack (14) is also fixedly installed on the lower surface of the foam box (10). The shape of the limiting block (131) is U-shaped, and the inner walls are respectively in contact with the toothed ring (13) and the rack (14). U-shaped grooves are respectively opened at the opposite ends of the two racks (14), and a connecting sleeve (15) is rotatably connected in the U-shaped groove. A piston shaft (16) is piston-connected in the connecting sleeve (15), and the piston shaft (16) penetrates and is connected to the rotating shaft (17).

4. The fire extinguishing device for a coal conveying trestle according to claim 2, characterized in that: The length of the flow guide pipe (191) is adapted to the reciprocating swing angle of the spraying box (19).

5. The coal conveying trestle fire extinguishing device according to claim 1, characterized in that: The liquid supply assembly (2) includes a liquid mixing box (20) fixedly connected to one side of the foam box (10), and the water outlet pipe of the liquid mixing box (20) penetrates through one side of the inner cavity of the foam box (10). The top of the liquid mixing box (20) is respectively connected with a first liquid delivery pipe (21) and a second liquid delivery pipe (22) for transporting water and foam liquid. Solenoid valves connected to an external controller are arranged in both the first liquid delivery pipe (21) and the second liquid delivery pipe (22).

6. The fire extinguishing device for a coal conveyor gallery according to claim 1, characterized in that: The liquid supply assembly (2) further includes two small water pumps (23) fixedly connected to the bottom of the inner cavity of the foam box (10), and the drainage ports of the two small water pumps (23) are respectively connected to the water inlet ends of the corresponding diversion pipes (191).

7. The coal conveying trestle fire extinguishing device according to claim 1, wherein: The cleaning assembly (3) includes a protective cover (30) fixedly connected to the lower surface of the spraying assembly (1). Two magnetic blocks (31) corresponding to the reciprocating swing position of the spraying box (19) are arranged on the inner wall of the protective cover (30), and the magnetic poles of the two magnetic blocks (31) are opposite. A cleaning block (33) for cleaning the water spraying holes is attached to the water spraying side of the spraying box (19). Two limiting shafts (32) are also fixedly connected to the water spraying side of the spraying box (19). The two limiting shafts (32) penetrate through the cleaning block (33) and are slidably connected to the cleaning block (33). The cleaning block (33) is made of a magnetic material.

8. The coal conveying trestle fire extinguishing device according to claim 1, characterized in that: The cleaning assembly (3) further includes a brush block (34) which is embedded on the side of the cleaning block (33) facing the spraying box (19) to improve the cleaning effect of the cleaning block (33) on the water spraying holes when moving.

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