Fire coal quantitative conveying device for coal-fired power plant

Abstract

The invention discloses a fire coal quantitative conveying device for a coal-fired power plant, and belongs to the technical field of coal-fired power plants. The device comprises a support, a conveying mechanism is installed at the top end of the support, a protective shell is fixedly installed at the top end of the support, a fire extinguishing assembly is fixedly installed at the top end of the protective shell, and a cooling assembly is fixedly installed on the side wall of the protective shell. By arranging the fireproof assembly, in the process that a first hydraulic push rod drives a pressing plate to conduct reciprocating compaction, a first connecting plate can be driven to conduct synchronous movement, external air is continuously guided into a cavity through the pressure intensity difference generated by sealing sliding between a piston plate and a sealing box, stable air flow is formed, and then the stable air flow is exhausted along an exhaust hole; in the process, heat generated by the friction contact surface of the protective shell and the fire coal is continuously exchanged, so that cooling is performed, fire caused by continuous friction between the fire coal and the protective shell and over-high temperature is avoided, the effect of preventing spontaneous combustion of the fire coal is further achieved, and the safety of the device is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal-fired power plants, and in particular relates to a quantitative coal conveying device for coal-fired power plants. Background Art

[0002] A combustion power plant is a factory that converts the heat energy generated by the combustion of solid and liquid fuels such as coal, oil and natural gas into kinetic energy to produce electricity. Coal is one of the important resources. Currently, the main fuel in combined cycle power generation equipment, synthetic ammonia and other fields cannot do without coal. Among them, coal transportation is the most basic device, which is used in almost all factories.

[0003] Chinese patent CN212953195U announces a quantitative coal conveying device for coal-fired power plants, which relates to the field of coal conveying technology, including a support frame, the top of the support frame is fixedly connected to a coal storage box, the bottom of the coal storage box is fixedly connected to a funnel, the inside of the coal storage box is fixedly connected to a cross plate, and the bottom of the funnel is provided with a conveying device, the conveying device consists of a driving motor, a rotating shaft, conveying blades and a fixed cylinder, a feed port is provided at the top of one side of the fixed cylinder, a discharge port is provided at the bottom of the other side of the fixed cylinder, the conveying blades are fixedly connected to the outside of the rotating shaft, both ends of the rotating shaft are rotatably connected to the two ends of the fixed cylinder through bearings, and the driving motor is fixedly connected to one end of the fixed cylinder. The quantitative coal conveying device for coal-fired power plants solves the problems of safety hazards in existing coal conveying mechanisms, inconvenience in adjusting the coal conveying speed and single coal supply method.

[0004] At present, during the transportation of coal, it will be vibrated and rubbed, which will cause the temperature of the inner wall of the protective shell to rise. In addition, coal will produce flammable coal dust during transportation. When the heat accumulates to a certain level, the coal will spontaneously combust. In addition, the methane gas adsorbed internally is released and accumulated under high temperature and dry conditions, which may cause an explosion when encountering an open flame. Therefore, when the coal catches fire, it needs to be extinguished in time. However, in the existing technology, most coal fires require manual extinguishing, and there is a certain time interval between extinguishing fires, which poses a safety hazard. Moreover, after the coal is extinguished, the staff needs to check the combustion of the coal, but the temperature around the coal is still high. If a rash inspection is carried out at this time, the coal will come into contact with the outside air, resulting in secondary explosion, which has certain limitations.

[0005] Therefore, we propose a coal quantitative conveying device for coal-fired power plants to solve the above-mentioned problems. Summary of the invention

[0006] In view of the problem that coal in the prior art will produce flammable coal dust during transportation, and when heat accumulates to a certain level, the coal will spontaneously combust. In addition, the methane gas adsorbed inside is released and accumulated under high temperature and dry conditions, which may cause an explosion when encountering an open flame. Moreover, the temperature around the coal is still relatively high. If a hasty inspection is carried out at this time, there will be a secondary explosion after the coal comes into contact with the outside air. The purpose of the present invention is to provide a quantitative coal conveying device for a coal-fired power plant.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is as follows: A quantitative coal conveying device for a coal-fired power plant, comprising a bracket, a conveying mechanism is installed on the top of the bracket, a protective shell is fixedly installed on the top of the bracket, a fixing frame is fixedly connected to the top of the protective shell, a lower hopper is fixedly connected to the top of the fixing frame, a fire protection component is fixedly installed on the top of the protective shell, a fire extinguishing component is fixedly installed on the top of the protective shell, and a cooling component is fixedly installed on the side wall of the protective shell.

[0008] Furthermore, the fire protection assembly includes a first mounting bracket, which is fixedly connected to the top of the protective shell, and the side walls on both sides of the protective shell are symmetrically provided with cavities, and the top of the protective shell is provided with a rectangular hole, and the side walls of the protective shell are symmetrically fixedly connected with sealing boxes, and each side wall of the sealing box is fixedly connected with an air intake pipe, and a first one-way air inlet valve is installed inside the air intake pipe, and the other side wall of the sealing box is fixedly connected with an air outlet pipe, one end of the air outlet pipe penetrates through the side wall of the protective shell and extends to the inside of an adjacent cavity, and a first one-way air outlet valve is installed inside the air outlet pipe.

[0009] Furthermore, a first hydraulic push rod is fixedly connected to the top of the first mounting frame, and a movable end of the first hydraulic push rod is fixedly connected to a pressure plate after passing through the top wall of the first mounting frame. The pressure plate slides against the rectangular hole and the inner wall of the protective shell, and a first connecting plate is fixedly connected to the side wall of the movable end of the first hydraulic push rod.

[0010] Furthermore, the bottom end of the first connecting plate is symmetrically fixedly connected with connecting rods, one end of each connecting rod is fixedly connected with a piston plate, the piston plate is sealingly and slidingly connected to the adjacent inner wall of the sealing box, the side wall of one side of the protective shell is symmetrically provided with exhaust holes, each of the exhaust holes is installed with a second one-way air outlet valve, the side wall of the protective shell is symmetrically provided with air inlet holes, each of the air inlet holes is communicated with the adjacent cavity, and each of the air inlet holes is installed with a second one-way air inlet valve.

[0011] Furthermore, the fire extinguishing assembly includes a second mounting bracket, which is fixedly connected to the top of the protective shell, and the top of the protective shell is symmetrically provided with through holes. The top of the second mounting bracket is fixedly connected to a second hydraulic push rod, and the movable end of the second hydraulic push rod passes through the top wall of the second mounting bracket and is fixedly connected to a second connecting plate, and the bottom end of the second connecting plate is symmetrically fixedly connected to partitions, and each of the partitions passes through adjacent through holes and is sealed and slidably connected to the inner wall of the protective shell.

[0012] Furthermore, the input end of the negative pressure pump is fixedly connected to a first air extraction pipe, one end of the first air extraction pipe passes through the side wall of the protective shell and extends to the inside of the protective shell, a first control valve is installed inside the first air extraction pipe, and the output end of the negative pressure pump is fixedly connected to a first air guide pipe, one end of the first air guide pipe is fixedly connected to the top of the air storage tank.

[0013] Furthermore, a second control valve is installed inside the first air duct, a first connecting pipe is fixedly connected to a side wall of one side of the protective shell, both ends of the first connecting pipe are fixedly connected to the interior of an adjacent cavity, a second air extraction pipe is fixedly connected to the side wall of the first connecting pipe, one end of the second air extraction pipe is fixedly connected to the side wall of the first air extraction pipe, a third control valve is installed inside the second air extraction pipe, a second air duct is fixedly connected to the side wall of the first air duct, and a fourth control valve is installed inside the second air extraction pipe.

[0014] Furthermore, the cooling assembly includes a third exhaust pipe, which is fixedly connected to the side wall of the first exhaust pipe. The inner wall of the protective shell is symmetrically provided with a plurality of circular holes, and each of the circular holes is connected to the inside of an adjacent cavity.

[0015] Furthermore, a one-way valve is installed inside each circular hole, a refrigeration plate is fixedly connected to the inner wall of each cavity, a fifth control valve is installed inside the third exhaust pipe, and the side wall of the first air duct is fixedly connected to the third air duct.

[0016] Furthermore, a sixth control valve is installed inside the third air duct, and a second connecting pipe is fixedly connected to the side wall on the other side of the protective shell. Both ends of the second connecting pipe are respectively fixedly connected to the interior of an adjacent cavity, and the third air duct is fixedly connected to the second connecting pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects: By setting up a fireproof component, the movable end of the hydraulic push rod is extended to drive the pressure plate to move downward to compact the coal to be transported; by compacting the coal, the air circulation inside the coal is reduced to form a suffocation layer, thereby preventing the coal from contacting with oxygen in the air, reducing the occurrence of oxidation reactions, and reducing the risk of combustion; in the process of the first hydraulic push rod driving the pressure plate to perform reciprocating compaction, it will drive the first connecting plate to move synchronously, and utilize the pressure difference generated by the sealing sliding between the piston plate and the sealing box to continuously introduce external air into the cavity to form a stable airflow, which is then discharged along the exhaust hole. In this process, the heat generated by the friction contact surface between the protective shell and the coal is continuously exchanged, thereby cooling down, avoiding continuous friction between the coal and the protective shell, and preventing fire caused by excessive temperature, and further preventing combustion. The effect of spontaneous combustion of coal improves the safety of the device; by setting up a fire extinguishing component, the second hydraulic push rod is started, the second hydraulic push rod is extended, and the second connecting plate is driven to move downward, so that the two partitions move downward synchronously until the two partitions contact the conveyor belt in the conveying mechanism, and the coal in the conveying section is isolated. Since the partition is sealed and slidably connected to the inner wall of the protective shell, the two partitions are in a closed state. At this time, the negative pressure pump is started, and the first control valve and the second control valve are opened. The negative pressure pump extracts methane and air between the two partitions through the first exhaust pipe at the input end, so that the two partitions are in a vacuum state. By extracting methane, the explosion of methane in the coal is avoided after encountering an open flame, thereby improving the safety effect, and the partition is evacuated into a vacuum state, so that the interior is lacking in oxygen, which suppresses the development of the fire and speeds up the fire extinguishing; By setting a cooling component, the third control valve and the fourth control valve are closed, and the fifth control valve and the sixth control valve are opened. At this time, the first control valve and the second control valve are both in a closed state, so that the third exhaust pipe and the third air guide pipe are in a working state, and the first one-way air outlet valve in the exhaust hole and the second one-way air inlet valve in the air inlet hole are closed, so that the inside of the cavity is in a closed state, and then the refrigeration plate is opened, and the inside of the cavity is refrigerated by the refrigeration plate, and the one-way valve inside the circular hole is opened. The one-way valve allows the gas inside the cavity to enter the inside of the protective shell only along the circular hole, and then the external air is drawn in through the third exhaust pipe by a negative pressure pump, and introduced into the inside of the second connecting pipe through the third air guide pipe, and finally enters the inside of the cavity. As the gas continues to enter the inside of the cavity, the refrigerated air in the cavity will enter between the two partitions through the circular hole. Since the partitions are in a vacuum state at this time, the refrigerated air can enter along the circular hole. As the cold air continues to enter, the space between the two partitions is refrigerated, the temperature is reduced faster, and the subsequent high temperature secondary explosion after the coal contacts the air is avoided, thereby improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2It is a rear view of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the fire protection component, the fire extinguishing component and the cooling component in the present invention; Figure 4 is a side sectional view of the protective shell of the present invention; Figure 5 It is a main cross-sectional view of the protective shell of the present invention; Figure 6 is a cross-sectional view of the fireproof assembly of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the fireproof component in the present invention; Figure 8 It is a partial structural schematic diagram of the fire extinguishing assembly in the present invention; Fig. 9 It is a partial structural schematic diagram of the fire extinguishing component and the cooling component in the present invention; Fig.10 for Fig. 9 A partial enlarged schematic diagram of part A; Fig.11 It is a structural schematic diagram of the cooling zone component of the present invention; Fig.12 for Fig.11 A partial enlarged schematic diagram of part B; Fig.13 It is a partial structural schematic diagram of the fire extinguishing assembly in the present invention; Fig.14 It is a schematic diagram of the partial structure of the fire extinguishing assembly in the present invention.

[0019] In the figure: 1, bracket; 11, conveying mechanism; 2, protective shell; 21, rectangular hole; 22, through hole; 3, fixing frame; 31, lower hopper; 4, fireproof component; 41, cavity; 42, first mounting frame; 43, first hydraulic push rod; 44, pressure plate; 45, first connecting plate; 46, connecting rod; 47, piston plate; 48, sealing box; 49, suction pipe; 410, first one-way air inlet valve; 411, air outlet pipe; 412, first one-way air outlet valve; 413, exhaust hole; 414, second one-way air outlet valve; 415, air inlet hole; 416, second one-way air inlet valve; 5, fire extinguishing component; 51, The second mounting frame; 52, the second hydraulic push rod; 53, the second connecting plate; 54, the partition; 55, the negative pressure pump; 56, the air storage tank; 57, the first exhaust pipe; 58, the first control valve; 59, the first air duct; 510, the second control valve; 511, the first connecting pipe; 512, the second exhaust pipe; 513, the third control valve; 514, the second air duct; 515, the fourth control valve; 6, the cooling component; 61, the round hole; 62, the one-way valve; 63, the refrigeration plate; 64, the third exhaust pipe; 65, the fifth control valve; 66, the third air duct; 67, the sixth control valve; 68, the second connecting pipe. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with specific embodiments.

[0021] In order to solve the problem that during the coal transportation process, the inner wall temperature of the protective shell 2 will increase due to vibration and friction, and the coal will produce flammable coal dust during transportation, and when the heat accumulates to a certain extent, the coal will spontaneously combust. Figure 1 - Figure 7 As shown: A quantitative coal conveying device for a coal-fired power plant includes a bracket 1, which is characterized in that: a conveying mechanism 11 is installed on the top of the bracket 1, and the conveying mechanism 11 is a prior art, which is composed of a motor, a belt and a pulley. The motor drives the pulley to rotate, so that the belt conveys the coal. A protective shell 2 is fixedly installed on the top of the bracket 1, and a fixed frame 3 is fixedly connected to the top of the protective shell 2. A lower hopper 31 is fixedly connected to the top of the fixed frame 3. The lower hopper 31 is used for centralized and guided discharge of coal. A fireproof component 4 is fixedly installed on the top of the protective shell 2. By setting the fireproof component 4, the movable end of the hydraulic push rod 43 is extended to drive the pressing plate 44 to move downward, so as to compact the coal to be transported; by compacting the coal, the internal The air circulation is reduced, and a suffocation layer is formed, thereby preventing the contact between the coal and the oxygen in the air, reducing the occurrence of oxidation reactions and reducing the risk of combustion. In the process of the first hydraulic push rod 43 driving the pressure plate 44 to perform reciprocating compaction, the first connecting plate 45 will be driven to move synchronously, and the pressure difference generated by the sealing sliding between the piston plate 47 and the sealing box 48 is utilized to continuously introduce the external air into the cavity 41 to form a stable airflow, and then discharge it along the exhaust hole 413. In this process, the heat generated by the friction contact surface between the protective shell 2 and the coal will be continuously exchanged, thereby cooling down, avoiding continuous friction between the coal and the protective shell 2, and preventing fire caused by excessive temperature. Further, it plays a role in preventing the spontaneous combustion of the coal and improves the safety of the device.

[0022] A fire extinguishing assembly 5 is fixedly installed on the top of the protective shell 2. Due to the burning coal, the fire extinguishing assembly 5 is set to start the second hydraulic push rod 52, and the second hydraulic push rod 52 is extended to drive the second connecting plate 53 to move downward, so that the two partitions 54 move downward synchronously until the two partitions 54 contact the conveyor belt in the conveying mechanism 11 to isolate the burning coal in the conveying section. Since the partition 54 is sealed and slidably connected to the inner wall of the protective shell 2, the two partitions 54 are in a closed state. At this time, the negative pressure pump 55 is started, and the first control valve 58 and the second control valve 510 are opened. The negative pressure pump 55 extracts methane and air between the two partitions 54 through the first exhaust pipe 57 at the input end, so that the two partitions 54 are in a vacuum state. By extracting methane, the explosion of methane in the burning coal is avoided when encountering an open flame, thereby improving the safety effect, and the partition 54 is evacuated into a vacuum state to cause oxygen deficiency inside, thereby suppressing the development of the fire and accelerating the fire extinguishing.

[0023] The side wall of the protective shell 2 is fixedly installed with a cooling assembly 6. By setting the cooling assembly 6, the third control valve 513 and the fourth control valve 515 are closed, and the fifth control valve 65 and the sixth control valve 67 are opened. At this time, the first control valve 58 and the second control valve 510 are both in a closed state, so that the third exhaust pipe 64 and the third air guide pipe 66 are in a working state, and the first one-way air outlet valve 414 in the exhaust hole 413 and the second one-way air inlet valve 416 in the air inlet hole 415 are closed, so that the interior of the cavity 41 is in a closed state, and then the refrigeration plate 63 is opened to cool the interior of the cavity 41 by using the refrigeration plate 63, and the one-way valve 62 in the circular hole 61 is opened, and the one-way valve 62 The gas inside the cavity 41 can only enter the protective shell 2 along the circular hole 61, and then the external air is sucked in through the third exhaust pipe 64 by the negative pressure pump 55, and introduced into the second connecting pipe 68 through the third air guide pipe 66, and finally enters the cavity 41. As the gas continues to enter the cavity 41, the refrigerated air inside the cavity 41 will enter between the two partitions 54 through the circular hole 61. Since the partitions 54 are in a vacuum state at this time, the refrigerated air can enter along the circular hole 61. As the cold air continues to enter, the space between the two partitions 54 is cooled, the temperature is reduced faster, and the subsequent secondary explosion of the coal at a high temperature after contacting the air is avoided, thereby improving the safety of the device.

[0024] The fireproof component 4 includes a first mounting bracket 42, which is fixedly connected to the top of the protective shell 2. The side walls of the protective shell 2 are symmetrically provided with cavities 41, and the top of the protective shell 2 is provided with a rectangular hole 21. The side walls of the protective shell 2 are symmetrically fixedly connected with sealing boxes 48. One side wall of each sealing box 48 is fixedly connected with an air intake pipe 49, and a first one-way air inlet valve 410 is installed inside the air intake pipe 49. The other side wall of the sealing box 48 is fixedly connected with an air outlet pipe 411, and one end of the air outlet pipe 411 passes through the side wall of the protective shell 2 and extends to the inside of the adjacent cavity 41, and a first one-way air outlet valve 412 is installed inside the air outlet pipe 411.

[0025] A first hydraulic push rod 43 is fixedly connected to the top of the first mounting frame 42. A movable end of the first hydraulic push rod 43 passes through the top wall of the first mounting frame 42 and is fixedly connected to a pressure plate 44. The pressure plate 44 slides against the rectangular hole 21 and the inner wall of the protective shell 2. A first connecting plate 45 is fixedly connected to the side wall of the movable end of the first hydraulic push rod 43.

[0026] The bottom end of the first connecting plate 45 is symmetrically fixedly connected with connecting rods 46, one end of each connecting rod 46 is fixedly connected with a piston plate 47, the piston plate 47 is sealingly and slidingly connected to the inner wall of the adjacent sealing box 48, the side wall of one side of the protective shell 2 is symmetrically provided with exhaust holes 413, each exhaust hole 413 is installed inside a second one-way air outlet valve 414, the side wall of the protective shell 2 is symmetrically provided with air inlet holes 415, each air inlet hole 415 is communicated with the interior of the adjacent cavity 41, and each air inlet hole 415 is installed inside a second one-way air inlet valve 416, and a filter is fixedly installed on the top of the sealing box 48 to prevent the burning coal from falling into the sealing box 48.

[0027] In this scheme: during the coal transportation process, the conveying mechanism 11 is intermittently started, and the conveying mechanism 11 is intermittently opened and closed by controlling the conveying mechanism 11. When the conveying mechanism 11 stops working, the coal is compacted, and when it works normally, the compacted coal is transported; first, the conveying mechanism 11 is started to transport the coal falling through the lower hopper 31 forward. When the coal is transported to the bottom of the pressing plate 44, the conveying mechanism 11 stops working, and the first hydraulic push rod 43 is started to reciprocate and retract and extend. The movable end of the hydraulic push rod 43 extends, driving the pressing plate 44 to move downward, wherein the width of the pressing plate 44 is the same as the width of the inner surface of the protective shell 2. The wall width is consistent, so that the descending pressure plate 44 is used to compact the coal to be transported, and after the coal is compacted, the conveying mechanism 11 is started again to transport the compacted coal; by compacting the coal, the air circulation inside the coal is reduced, forming a suffocation layer, thereby preventing the contact between the coal and the oxygen in the air, reducing the occurrence of oxidation reactions, and reducing the risk of combustion. Since compacting the coal is to compact the coal blocks by physical methods, this process does not involve chemical reactions or heat generation, and therefore will not cause the coal to burn. By compacting the coal, the spontaneous combustion of the coal is prevented; In the process of the first hydraulic push rod 43 driving the pressure plate 44 to perform reciprocating compaction, the first connecting plate 45 will be driven to move synchronously. When the first connecting plate 45 moves upward synchronously, the piston plate 47 is driven upward by the connecting rod 46. The pressure difference generated by the sealed sliding between the piston plate 47 and the sealing box 48 is used to allow external air to enter the sealing box 48 along the intake pipe 49. A first one-way intake valve 410 is installed inside the intake pipe 49, so that external air can only enter the sealing box 48 along the intake pipe 49. When the first connecting plate 45 moves downward synchronously, the pressure between the piston plate 47 and the sealing box 48 increases, thereby the air in the sealing box 48 is compressed. The air is introduced into the cavity 41 along the air outlet pipe 411, and then the air inside the cavity 41 is discharged along the exhaust hole 413. The second one-way air outlet valve 414 inside the exhaust hole 413 allows the gas in the cavity 414 to be discharged only along the exhaust hole 413. As the gas is continuously introduced, an airflow is generated, which drives the formation of a stable airflow inside the cavity 41 and is discharged along the exhaust hole 413. In this process, the heat generated by the friction contact surface between the protective shell 2 and the coal is continuously exchanged, thereby cooling down the temperature, avoiding continuous friction between the coal and the protective shell 2, and preventing fire caused by excessive temperature. Further, it plays a role in preventing the spontaneous combustion of the coal, thereby improving the safety of the device.

[0028] In order to solve the problem that the methane gas adsorbed inside is released and accumulated under high temperature and dry conditions, which may cause explosion when encountering open flames, when coal fire occurs, it is necessary to extinguish it in time. However, in the existing technology, most of the coal fires need to be extinguished manually, and there is a certain time interval between extinguishing fires, which poses a safety hazard. Figure 8 - Fig.10 and Fig.13 - Fig.14 As shown: The fire extinguishing assembly 5 includes a second mounting bracket 51, which is fixedly connected to the top of the protective shell 2. The top of the protective shell 2 is symmetrically provided with through holes 22. The top of the second mounting bracket 51 is fixedly connected to a second hydraulic push rod 52. The movable end of the second hydraulic push rod 52 passes through the top wall of the second mounting bracket 51 and is fixedly connected to a second connecting plate 53. The bottom end of the second connecting plate 53 is symmetrically fixedly connected to a partition 54. Each partition 54 passes through adjacent through holes 22 and is sealed and slidably connected to the inner wall of the protective shell 2.

[0029] The input end of the negative pressure pump 55 is fixedly connected to a first air extraction pipe 57, one end of the first air extraction pipe 57 passes through the side wall of the protective shell 2 and extends to the inside of the protective shell 2, a first control valve 58 is installed inside the first air extraction pipe 57, and the output end of the negative pressure pump 55 is fixedly connected to a first air guide pipe 59, one end of the first air guide pipe 59 is fixedly connected to the top of the air storage tank 56.

[0030] A second control valve 510 is installed inside the first air duct 59, a first connecting pipe 511 is fixedly connected to a side wall of one side of the protective shell 2, both ends of the first connecting pipe 511 are fixedly connected to the interior of the adjacent cavity 41, a second air extraction pipe 512 is fixedly connected to the side wall of the first connecting pipe 511, one end of the second air extraction pipe 512 is fixedly connected to the side wall of the first air extraction pipe 57, a third control valve 513 is installed inside the second air extraction pipe 512, a second air duct 514 is fixedly connected to the side wall of the first air duct 59, and a fourth control valve 515 is installed inside the second air duct 514.

[0031] In this solution, if the coal is caught fire due to other factors during transportation, the conveying mechanism 11 and the first hydraulic push rod 43 are immediately closed, and the second hydraulic push rod 52 is started. The second hydraulic push rod 52 is extended to drive the second connecting plate 53 to move downward, so that the two partitions 54 are synchronously moved downward, wherein the bottom end of the partition 54 is a wedge-shaped structure, which can effectively separate the coal until the two partitions 54 contact the conveyor belt in the conveying mechanism 11 to isolate the coal in the conveying section. Since the partition 54 is sealed and slidably connected to the inner wall of the protective shell 2, the two partitions 54 are in a closed state. At this time, the negative pressure pump 55 is started, and the first control valve 58 and the second control valve 510 are opened. At this time, the third control valve 513, the fourth control valve 515, the fifth control valve 65 and the sixth control valve 66 are opened. 7 are all in a closed state, so that the first air extraction pipe 57 and the first air guide pipe 59 are in a working state, and the negative pressure pump 55 extracts methane and air between the two partitions 54 through the first air extraction pipe 57 at the input end, so that the space between the two partitions 54 is in a vacuum state. By extracting the methane, the explosion of the methane in the coal after encountering the open flame is avoided, thereby improving the safety effect, and the partition 54 is evacuated into a vacuum state, so that the interior of the partition is lacking in oxygen, the development of the fire is suppressed, and the fire is extinguished faster; after the partition 54 is evacuated into a vacuum state, the first control valve 58 and the second control valve 510 are closed, and the third control valve 513 and the fourth control valve 515 are opened. At this time, the fifth control valve 65 and the sixth control valve 67 are also in a closed state, so that the second air extraction pipe 512 and the second air guide pipe 514 are in a working state; Since the combustion of coal will cause the temperature inside the two partitions 54 to rise, after switching to open the third control valve 513 and the fourth control valve 515, the air in the cavity 41 is extracted along the first connecting pipe 511 and the second exhaust pipe 512 by using the input end of the negative pressure pump 55, and then discharged through the second air duct 514. In the process of the negative pressure pump 55 exhausting air inside the cavity 41, the external air will enter the cavity 41 along the air inlet hole 416, wherein the air inlet hole 416 is installed with a second one-way air inlet valve 416, so that the external air can only enter the cavity 41 along the air inlet hole 416; through the coordinated use of the negative pressure pump 55, the second exhaust pipe 512 and the second air duct 514, the interior of the cavity 41 continues to be ventilated, thereby performing heat exchange and cooling the temperature between the two partitions 54 to avoid excessive temperature expansion and serious consequences.

[0032] In order to solve the problem that after the coal fire is extinguished, the staff needs to check the coal combustion situation, but the temperature around the coal is still high. If the staff checks rashly at this time, the coal will come into contact with the outside air, which will cause secondary explosion. This has certain limitations, such as Fig.10 - Fig.12 As shown; The cooling assembly 6 includes a third exhaust pipe 64 , which is fixedly connected to the side wall of the first exhaust pipe 57 . A plurality of circular holes 61 are symmetrically formed on the inner wall of the protective shell 2 , and each circular hole 61 is connected to the inside of the adjacent cavity 41 .

[0033] A one-way valve 62 is installed inside each circular hole 61 , a cooling plate 63 is fixedly connected to the inner wall of each cavity 41 , a fifth control valve 65 is installed inside the third exhaust pipe 64 , and a third air pipe 66 is fixedly connected to the side wall of the first air pipe 59 .

[0034] A sixth control valve 67 is installed inside the third air duct 66 , and a second connecting pipe 68 is fixedly connected to the side wall of the other side of the protective shell 2 . Both ends of the second connecting pipe 68 are fixedly connected to the inside of the adjacent cavity 41 , and the third air duct 66 is fixedly connected to the second connecting pipe 68 .

[0035] In this solution: In order to avoid secondary deflagration of the coal, the temperature around the coal needs to be cooled, and natural cooling takes a long time. At this time, the third control valve 513 and the fourth control valve 515 are closed, and the fifth control valve 65 and the sixth control valve 67 are opened. At this time, the first control valve 58 and the second control valve 510 are both in a closed state, so that the third exhaust pipe 64 and the third air guide pipe 66 are in a working state, and the first one-way air outlet valve 414 in the exhaust hole 413 and the second one-way air inlet valve 416 in the air inlet hole 415 are closed, so that the interior of the cavity 41 is in a closed state, and then the refrigeration plate 63 is opened, wherein the cooling end of the refrigeration plate 63 is located inside the cavity 41, and the heating end is located outside the protective shell 2, so that the interior of the cavity 41 is heated by the refrigeration plate 63. Refrigeration, and open the one-way valve 62 inside the circular hole 61. The one-way valve 62 allows the gas inside the cavity 41 to enter the protective shell 2 only along the circular hole 61, and then the external air is sucked in through the third exhaust pipe 64 by the negative pressure pump 55, and introduced into the second connecting pipe 68 through the third air guide pipe 66, and finally enters the cavity 41. As the gas continues to enter the cavity 41, the refrigerated air in the cavity 41 will enter between the two partitions 54 through the circular hole 61. Since the partitions 54 are in a vacuum state at this time, the refrigerated air can enter along the circular hole 61. As the cold air continues to enter, the space between the two partitions 54 is refrigerated, the temperature is reduced faster, and the subsequent secondary explosion of the coal at a high temperature after contacting the air is avoided, thereby improving the safety of the device.

[0036] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A quantitative coal conveying device for a coal-fired power plant, comprising a bracket (1), characterized in that: A conveying mechanism (11) is installed at the top of the support (1), a protective shell (2) is fixedly installed at the top of the support (1), a fixing frame (3) is fixedly connected to the top of the protective shell (2), a lower hopper (31) is fixedly connected to the top of the fixing frame (3), a fire protection component (4) is fixedly installed at the top of the protective shell (2), a fire extinguishing component (5) is fixedly installed at the top of the protective shell (2), and a cooling component (6) is fixedly installed on the side wall of the protective shell (2).

2. A coal quantitative conveying device for a coal-fired power plant according to claim 1, characterized in that: The fireproof assembly (4) comprises a first mounting frame (42), the first mounting frame (42) being fixedly connected to the top of the protective shell (2), the side walls of the protective shell (2) being symmetrically provided with cavities (41), the top of the protective shell (2) being provided with a rectangular hole (21), the side walls of the protective shell (2) being symmetrically fixedly connected with sealing boxes (48), one side wall of each sealing box (48) being fixedly connected with an air intake pipe (49), the interior of the air intake pipe (49) being provided with a first one-way air intake valve (410), the other side wall of the sealing box (48) being fixedly connected with an air outlet pipe (411), one end of the air outlet pipe (411) penetrating through the side wall of the protective shell (2) and extending to the interior of an adjacent cavity (41), the interior of the air outlet pipe (411) being provided with a first one-way air outlet valve (412).

3. The device for quantitatively conveying coal for a coal-fired power plant according to claim 2, characterized in that: A first hydraulic push rod (43) is fixedly connected to the top of the first mounting frame (42); a movable end of the first hydraulic push rod (43) passes through the top wall of the first mounting frame (42) and is fixedly connected to a pressure plate (44); the pressure plate (44) slides against the rectangular hole (21) and the inner wall of the protective shell (2); and a first connecting plate (45) is fixedly connected to the side wall of the movable end of the first hydraulic push rod (43).

4. The device for quantitatively conveying coal for a coal-fired power plant according to claim 3, characterized in that: The bottom end of the first connecting plate (45) is symmetrically fixedly connected to connecting rods (46), one end of each connecting rod (46) is fixedly connected to a piston plate (47), and the piston plate (47) is sealingly and slidably connected to the inner wall of an adjacent sealing box (48). The side wall of one side of the protective shell (2) is symmetrically provided with exhaust holes (413), and each exhaust hole (413) is internally installed with a second one-way air outlet valve (414). The side wall of the protective shell (2) is symmetrically provided with air inlet holes (415), and each air inlet hole (415) is communicated with the interior of an adjacent cavity (41), and each air inlet hole (415) is internally installed with a second one-way air inlet valve (416).

5. The device for quantitatively conveying coal for a coal-fired power plant according to claim 1, characterized in that: The fire extinguishing assembly (5) comprises a second mounting frame (51), the second mounting frame (51) being fixedly connected to the top of the protective shell (2), the top of the protective shell (2) being symmetrically provided with through holes (22), the top of the second mounting frame (51) being fixedly connected to a second hydraulic push rod (52), the movable end of the second hydraulic push rod (52) passing through the top wall of the second mounting frame (51) and then being fixedly connected to a second connecting plate (53), the bottom end of the second connecting plate (53) being symmetrically fixedly connected to a partition plate (54), each of the partition plates (54) passing through adjacent through holes (22) and then being sealingly and slidably connected to the inner wall of the protective shell (2).

6. A quantitative coal conveying device for a coal-fired power plant according to claim 5, characterized in that: The input end of the negative pressure pump (55) is fixedly connected to a first air extraction pipe (57), one end of the first air extraction pipe (57) penetrates the side wall of the protective shell (2) and extends into the interior of the protective shell (2), a first control valve (58) is installed inside the first air extraction pipe (57), and the output end of the negative pressure pump (55) is fixedly connected to a first air guide pipe (59), one end of the first air guide pipe (59) is fixedly connected to the top of the air storage tank (56).

7. A quantitative coal conveying device for a coal-fired power plant according to claim 6, characterized in that: A second control valve (510) is installed inside the first air guide pipe (59); a first connecting pipe (511) is fixedly connected to a side wall of one side of the protective shell (2); both ends of the first connecting pipe (511) are fixedly connected to the inside of an adjacent cavity (41); a second air extraction pipe (512) is fixedly connected to the side wall of the first connecting pipe (511); one end of the second air extraction pipe (512) is fixedly connected to the side wall of the first air extraction pipe (57); a third control valve (513) is installed inside the second air extraction pipe (512); a second air guide pipe (514) is fixedly connected to the side wall of the first air guide pipe (59); and a fourth control valve (515) is installed inside the second air guide pipe (514).

8. The device for quantitatively conveying coal for a coal-fired power plant according to claim 6, characterized in that: The cooling assembly (6) comprises a third exhaust pipe (64), the third exhaust pipe (64) being fixedly connected to the side wall of the first exhaust pipe (57), and a plurality of circular holes (61) are symmetrically provided on the inner side wall of the protective shell (2), each of the circular holes (61) being connected to the interior of an adjacent cavity (41).

9. A quantitative coal conveying device for a coal-fired power plant according to claim 8, characterized in that: A one-way valve (62) is installed inside each circular hole (61), a cooling plate (63) is fixedly connected to the inner wall of each cavity (41), a fifth control valve (65) is installed inside the third air extraction pipe (64), and the side wall of the first air guide pipe (59) is fixedly connected to the third air guide pipe (66).

10. The device for quantitatively conveying coal for a coal-fired power plant according to claim 3, characterized in that: A sixth control valve (67) is installed inside the third air guide pipe (66), and a second connecting pipe (68) is fixedly connected to the side wall of the other side of the protective shell (2), and both ends of the second connecting pipe (68) are respectively fixedly connected to the inside of an adjacent cavity (41), and the third air guide pipe (66) is fixedly connected to the second connecting pipe (68).

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