Flame retardant device for preventing coal feeder belt from catching fire

Abstract

The utility model discloses a flame-retardant device for preventing a coal feeder belt from catching fire, and particularly relates to the technical field of flame-retardant devices, which comprises a hearth, a coal hopper is arranged on one side of the hearth, the bottom of the coal hopper is communicated with a gate valve component, the bottom of the gate valve component is communicated with a coal dropping pipe, a coal conveying belt is arranged on one side of the coal hopper, and the coal conveying belt is arranged on the other side of the coal hopper. The bottom of the coal hopper is communicated with a communicating pipe, the outer wall of the communicating pipe is provided with a steam flame-retardant structure, the steam flame-retardant structure comprises a steam pipe, the steam pipe is arranged on one side of the communicating pipe, one end of the steam pipe is communicated with a steam head, the surface of the steam head is communicated with a plurality of nozzles, and the surface of the steam pipe is provided with a control valve. High-temperature flue gas in the communicating pipe can be effectively blocked, the phenomenon that the coal feeding belt is on fire due to the fact that the high-temperature flue gas in the hearth flows back when coal is cut off is avoided, the fire risk of the coal conveying belt is greatly reduced, and the safety of a coal feeding system is powerfully guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of flame -retardant device, more specifically, the utility model relates to a kind of flame -retardant device for preventing coal feeder belt fire. BACKGROUND

[0002] In the industrial process of coal conveying and combustion, coal feeder is the key equipment connecting coal conveying system and furnace,

[0003] However, in actual operation process, in the case of coal feeder coal, the medium in the coal drop pipe is interrupted, and the high-temperature flue gas in the furnace will be reversed along the coal drop pipe, and then trigger the high-temperature stop interlocking action of coal feeder, so that the plug valve is closed to prevent the further spread of high-temperature flue gas, but the plug valve needs a certain time to close, and in this process, the conveying belt is exposed to high-temperature flue gas, which is easy to catch fire, once the belt catches fire, not only will damage the belt itself, cause coal conveying interruption, affect production efficiency, but also may cause fire, threaten the safety of the entire production facility and personnel.

[0004] Therefore, the utility model provides a kind of flame -retardant device for preventing coal feeder belt fire. UTILITY MODEL CONTENT

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a kind of flame -retardant device for preventing coal feeder belt fire to solve the problems raised in the above background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of flame -retardant device for preventing coal feeder belt fire, including furnace, the side of the furnace is provided with coal drop hopper, the bottom of the coal drop hopper is communicated with plug valve assembly, the bottom of the plug valve assembly is communicated with coal drop pipe, the side of the coal drop hopper is provided with coal conveying belt, the bottom of the coal drop hopper is communicated with communication pipe, the outer wall of the coal drop hopper is equipped with coal conveying port, the one end of the coal conveying belt extends to the inside of coal drop hopper by coal conveying port.

[0007] To achieve high-temperature flame retardancy and prevent the coal conveyor belt from catching fire, preferably, the outer wall of the connecting pipe is provided with a steam flame retardant structure. This structure includes a steam pipe located on one side of the connecting pipe, with one end connected to a steam head. Several nozzles are connected to the surface of the steam head, which is attached to the outer wall of the connecting pipe. One end of each nozzle extends into the interior of the connecting pipe. A control valve is installed on the surface of the steam pipe. A connecting pipe is located on one side of the steam pipe. A filter assembly is installed between the connecting pipe and the steam pipe. The filter assembly includes an installation pipe located between the connecting pipe and the steam pipe. Connecting discs are fixedly installed at both ends of the installation pipe and at one end of both the connecting pipe and the steam pipe. A connecting ring is provided between every two connecting discs. A filter screen is fixedly installed inside the connecting ring. Several threaded holes are annularly formed at the connection points of the connecting discs and the connecting rings, and bolts are threaded into the interior of each threaded hole.

[0008] To enable the valve plate to open and close inside the valve housing, preferably, the slide valve assembly includes a valve housing, which is installed at the bottom of the connecting pipe and communicates with the bottom end of the connecting pipe. The top end of the coal drop pipe is connected to the bottom of the valve housing, and the bottom end extends into the interior of the furnace. A mounting bracket is fixedly installed on the surface of the valve housing, and a valve plate is slidably installed inside the valve housing. Two electric push rods are fixedly installed on the mounting bracket, and the output ends of the two electric push rods are fixedly connected to the valve plate. A rectangular opening is provided on the outer wall of the valve housing, and the valve plate is slidably connected to the valve housing through the rectangular opening. A sealing ring is installed on the outer wall of the valve plate.

[0009] The technical effects and advantages of this utility model are as follows:

[0010] By installing a steam flame-retardant structure at the connecting pipe, when the coal conveyor belt experiences a coal shortage, steam can be promptly sprayed to block the high-temperature flue gas in the connecting pipe, preventing the high-temperature flue gas from contacting the coal conveyor belt, thereby effectively preventing the coal conveyor belt from catching fire, reducing the risk of fire, and improving the safety of the coal feeding system.

[0011] The filter components can filter impurities in the steam, preventing them from clogging steam pipes, steam heads, nozzles, and other components. This ensures the normal operation of the steam flame retardant system, reduces maintenance costs and downtime caused by component blockage, guarantees the stable operation of the entire coal feeding system, and facilitates the disassembly and maintenance of the filter screen by operators. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the slide gate valve assembly of this utility model.

[0014] Figure 3 This is a three-dimensional schematic diagram of the steam flame-retardant structure of this utility model.

[0015] Figure 4 This is a structural diagram of the filter component of this utility model when disassembled.

[0016] Figure 5 This is a partial structural diagram of the connection between the sealing ring and the valve plate of this utility model.

[0017] The attached diagram is labeled as follows: 1. Furnace; 2. Coal hopper; 3. Coal chute; 4. Coal conveyor belt; 5. Connecting pipe; 6. Steam pipe; 7. Steam head; 8. Nozzle; 9. Control valve; 10. Connecting pipe; 11. Mounting pipe; 12. Connecting plate; 13. Connecting ring; 14. Filter screen; 15. Valve body; 16. Mounting bracket; 17. Valve plate; 18. Electric push rod; 19. Sealing ring; 20. Bolt. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] As attached Figures 1-5 The flame-retardant device shown includes a furnace 1, a coal hopper 2 on one side of the furnace 1, a slide valve assembly connected to the bottom of the coal hopper 2, a coal hopper pipe 3 connected to the bottom of the slide valve assembly, a coal conveying belt 4 on one side of the coal hopper 2, a connecting pipe 5 connected to the bottom of the coal hopper 2, a coal conveying port on the outer wall of the coal hopper 2, and one end of the coal conveying belt 4 extending into the interior of the coal hopper 2 through the coal conveying port.

[0020] Specifically, in this structure, firstly, the coal conveyor belt 4 is used to transport coal, which is transported through the coal inlet to the inside of the coal hopper 2. The coal inside the coal hopper 2 enters the inside of the slide valve assembly through the connecting pipe 5. At this time, the slide valve assembly is in the open state. The coal inside the slide valve assembly is transported to the inside of the furnace 1 through the coal drop pipe 3. When the coal conveyor belt 4 experiences a coal shortage, the slide valve assembly closes.

[0021] In this embodiment, as shown in the appendix Figure 1 , 3As shown in Figure 4, the outer wall of the connecting pipe 5 is provided with a steam flame-retardant structure, which includes a steam pipe 6. The steam pipe 6 is located on one side of the connecting pipe 5, and one end of the steam pipe 6 is connected to a steam head 7. Several nozzles 8 are connected to the surface of the steam head 7. The steam head 7 is attached to the outer wall of the connecting pipe 5. One end of each of the nozzles 8 extends into the interior of the connecting pipe 5. A control valve 9 is installed on the surface of the steam pipe 6. A connecting pipe 10 is provided on one side of the steam pipe 6. A filter assembly is provided between the connecting pipe 10 and the steam pipe 6. The filter assembly includes an installation pipe 11. The installation pipe 11 is located between the connecting pipe 10 and the steam pipe 6. Connecting discs 12 are fixedly installed at both ends of the installation pipe 11 and at one end of the connecting pipe 10 and the steam pipe 6. A connecting ring 13 is provided between every two connecting discs 12. A filter screen 14 is fixedly installed inside the connecting ring 13. Several threaded holes are opened in a ring shape at the connection between the connecting discs 12 and the connecting ring 13. Bolts 20 are threadedly installed inside the several threaded holes.

[0022] Specifically, in this structure, one end of the connecting pipe 10 can be connected to the steam equipment in advance. When the coal conveyor belt 4 experiences a coal shortage, the high-temperature flue gas in the furnace 1 backflows, causing the slide gate valve assembly to close. During the closing process of the slide gate valve assembly, the conveyor belt may be ignited by the high-temperature flue gas it receives.

[0023] Furthermore, since the gate valve closes slowly, the operator can quickly open the control valve 9, allowing steam to enter the filter assembly through the connecting pipe 10 for filtration, and then be transported to the steam head 7 through the steam pipe 6. Finally, it is sprayed out through multiple nozzles 8. The steam sprayed out by the nozzles 8 blocks the high-temperature flue gas inside the connecting pipe 5, thereby preventing the high-temperature flue gas from causing the coal conveyor belt 4 to catch fire, thus achieving the purpose of flame retardancy.

[0024] When the filter assembly filters impurities in the steam, the steam enters the filter assembly and is blocked by the filter screen 14 inside the two connecting rings 13, thereby ensuring that clean steam enters and preventing blockage of the pipes or nozzles 8. When the filter screen 14 needs to be cleaned, the operator can remove the bolts 20 at the connecting ring 13 and the connecting plate 12 to remove the connecting ring 13 and clean the filter screen 14. During installation, the connecting ring 13 is installed between the two connecting plates 12 and tightened with bolts 20.

[0025] It is worth noting that when connecting the connecting ring 13 and the connecting plate 12, a sealing sheet can be used to seal the connection, preventing steam leakage.

[0026] In this embodiment, as shown in the appendix Figure 1 , 2As shown in Figure 5, the slide valve assembly includes a valve housing 15, which is installed at the bottom of the connecting pipe 5 and is connected to the bottom end of the connecting pipe 5. The top end of the coal drop pipe 3 is connected to the bottom of the valve housing 15 and the bottom end extends into the interior of the furnace 1. A mounting bracket 16 is fixedly installed on the surface of the valve housing 15. A valve plate 17 is slidably installed inside the valve housing 15. Two electric push rods 18 are fixedly installed on the mounting bracket 16, and the output ends of the two electric push rods 18 are fixedly connected to the valve plate 17. A rectangular opening is provided on the outer wall of the valve housing 15, and the valve plate 17 is slidably connected to the valve housing 15 through the rectangular opening. A sealing ring 19 is installed on the outer wall of the valve plate 17.

[0027] Specifically, in this structure, when the slide valve assembly is closed, the two electric push rods 18 on the mounting bracket 16 push the valve plate 17 to slide inside the valve housing 15 through the rectangular opening, so that the inside of the valve housing 15 is in a closed state. Similarly, when conveying coal, the electric push rods 18 drive the valve plate 17 to open, so that the coal inside the coal hopper 2 is conveyed to the inside of the furnace 1 through the connecting pipe 5 and the coal hopper 3, thereby achieving the effect of feeding coal.

[0028] The sealing ring 19 on the valve plate 17 can increase the sealing effect between the outer wall of the valve plate 17 and the inner wall of the valve housing 15, and improve the sealing performance of the valve plate 17 after it is closed.

[0029] Working principle of this utility model:

[0030] This application provides a flame-retardant device to prevent fire on the coal feeder belt. In specific use, firstly, during the normal coal conveying stage, the coal conveyor belt 4 conveys the coal and delivers it to the inside of the coal hopper 2 through the coal conveying port. At this time, the bottom of the valve shell 15 in the slide valve assembly is connected to the connecting pipe 5 and the coal hopper pipe 3, and the slide valve assembly is in the open state. The coal inside the coal hopper 2 enters the valve shell 15 of the slide valve assembly through the connecting pipe 5, and is then delivered to the inside of the furnace 1 through the coal hopper pipe 3 to achieve normal coal feeding.

[0031] When the coal conveyor belt 4 experiences a coal shortage, the high temperature inside the furnace 1 may cause the high-temperature flue gas to backflow, which will cause the slide gate valve assembly to close. During the closing process of the slide gate valve assembly, the conveyor belt is at risk of catching fire due to receiving the high-temperature flue gas, because the slide gate valve may close relatively slowly.

[0032] Once the coal conveyor belt 4 experiences a coal shortage, the personnel on duty quickly open the control valve 9 on the surface of the steam pipe 6. The steam from the steam equipment connected in advance by the connecting pipe 10 enters the interior of the filter assembly through the connecting pipe 10. The filter screen 14 inside the two connecting rings 13 in the filter assembly blocks impurities in the steam, ensuring that clean steam passes through. The filtered steam is then transported through the steam pipe 6 to the interior of the steam head 7, and finally sprayed out from several nozzles 8 connected to the surface of the steam head 7. The steam sprayed out by the nozzles 8 blocks the high-temperature flue gas inside the connecting pipe 5, preventing the high-temperature flue gas from igniting the coal conveyor belt 4, thus achieving the purpose of flame retardancy.

[0033] When the slide gate valve assembly needs to be closed, the two electric push rods 18 fixedly installed on the mounting bracket 16 are activated, pushing the valve plate 17 to slide inside the valve shell 15 through the rectangular opening on the surface of the valve shell 15, so that the inside of the valve shell 15 is closed, thereby preventing the coal from being transported and preventing the high-temperature flue gas from flowing back. During normal coal transport, the electric push rods 18 drive the valve plate 17 to open, so that the coal inside the coal hopper 2 can be transported to the inside of the furnace 1 through the connecting pipe 5, the valve shell 15 and the coal hopper 3 in sequence, achieving the effect of coal feeding.

[0034] When the filter screen 14 of the filter assembly needs to be cleaned, the operator removes the bolts 20 at the connecting ring 13 and the connecting plate 12, removes the connecting ring 13, cleans the filter screen 14, and after cleaning, installs the connecting ring 13 between the two connecting plates 12 and tightens it with bolts 20. The connecting ring 13 and the connecting plate 12 can be sealed with a sealing plate to prevent steam leakage.

[0035] It is worth noting that all contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are existing technologies and are therefore not shown in the figures, nor will they be described here.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flame-retardant device for preventing fire on a coal feeder belt, comprising a furnace (1), a coal hopper (2) disposed on one side of the furnace (1), a slide valve assembly connected to the bottom of the coal hopper (2), a coal hopper pipe (3) connected to the bottom of the slide valve assembly, and a coal conveyor belt (4) disposed on one side of the coal hopper (2), characterized in that: The bottom of the coal hopper (2) is connected to a connecting pipe (5), and the outer wall of the connecting pipe (5) is provided with a steam flame-retardant structure. The steam flame retardant structure includes a steam pipe (6), which is disposed on one side of a connecting pipe (5), and one end of the steam pipe (6) is connected to a steam head (7). A plurality of nozzles (8) are connected to the surface of the steam head (7). A control valve (9) is installed on the surface of the steam pipe (6). A connecting pipe (10) is disposed on one side of the steam pipe (6). A filter assembly is disposed between the connecting pipe (10) and the steam pipe (6). The filter assembly includes an installation pipe (11) located between the connecting pipe (10) and the steam pipe (6). Both ends of the installation pipe (11) and one end of the connecting pipe (10) and the steam pipe (6) are fixedly installed with connecting discs (12). A connecting ring (13) is provided between every two connecting discs (12). A filter screen (14) is fixedly installed inside the connecting ring (13).

2. The flame-retardant device for preventing fire on the feeder belt according to claim 1, characterized in that: The slide valve assembly includes a valve housing (15), which is installed at the bottom of the connecting pipe (5) and communicates with the bottom end of the connecting pipe (5). The top end of the coal drop pipe (3) is connected to the bottom end of the valve housing (15) and the bottom end extends into the interior of the furnace (1).

3. The flame-retardant device for preventing fire on the feeder belt according to claim 2, characterized in that: A mounting bracket (16) is fixedly installed on the surface of the valve housing (15), and a valve plate (17) is slidably installed inside the valve housing (15). Two electric push rods (18) are fixedly installed on the mounting bracket (16), and the output ends of the two electric push rods (18) are fixedly connected to the valve plate (17). The outer wall of the valve housing (15) has a rectangular opening, and the valve plate (17) is slidably connected to the valve housing (15) through the rectangular opening. A sealing ring (19) is installed on the outer wall of the valve plate (17).

4. The flame-retardant device for preventing fire on the feeder belt according to claim 1, characterized in that: The outer wall of the coal hopper (2) is provided with a coal conveying port, and one end of the coal conveying belt (4) extends into the interior of the coal hopper (2) through the coal conveying port.

5. The flame-retardant device for preventing fire on the feeder belt according to claim 1, characterized in that: The steam head (7) is attached to the outer wall of the connecting pipe (5), and one end of each of the nozzles (8) extends into the interior of the connecting pipe (5).

6. The flame-retardant device for preventing fire on the feeder belt according to claim 1, characterized in that: The connection between the connecting disc (12) and the connecting ring (13) is provided with several threaded holes in a ring shape, and bolts (20) are threadedly installed inside the several threaded holes.

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