Double-bunker intercommunication coal conveying mechanism for raw coal bunker

Abstract

The invention provides a double-bunker intercommunication coal conveying mechanism for a raw coal bunker, and solves the problems of complex operation and low working efficiency during coal type switching of a coal feeding system of a coal-fired unit. The coal conveying mechanism comprises flow guide plate assemblies, a supporting frame, a driving mechanism and a conveying assembly, the flow guide plate assemblies are fixed to the two opposite ends of the supporting frame respectively, the flow guide plate assembly at one end of the supporting frame extends into a discharging hopper of one raw coal bunker, and the flow guide plate assembly at the other end of the supporting frame extends into a discharging hopper of the other raw coal bunker. And the driving mechanism is used for guiding the coal to the conveying assembly, the driving mechanism is in transmission connection with the conveying assembly, and under driving of the driving mechanism, the conveying assembly is arranged on the supporting frame and located between the two raw coal bins in a reciprocating motion mode, so that conveying of the coal between the different raw coal bins is achieved. Each raw coal bunker can convey different types of coals to the boiler, and when the unit adjusts the load and switches the coal types, the coals do not need to be fed again after the raw coal bunker finishes blanking, so that the working efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of coal feeding equipment, and in particular to a double-bin interconnected coal conveying mechanism for raw coal bins. Background Art

[0002] In the prior art, coal is stored in a raw coal bunker, and a coal feeder is provided below the lower hopper of each raw coal bunker. When the gate at the lower hopper of the raw coal bunker is opened, the coal can be fed into the coal feeder, thereby transporting and using the coal.

[0003] The applicant has found that the prior art has at least the following technical problems: the unit needs different types of coal under different load conditions. When it needs to switch between coal types with different calorific values, it can only reload coal after the original coal type in the raw coal bin is consumed, which cannot meet the unit's rapid load change requirements. Therefore, the quality of the coal entering the furnace is limited, and the boiler's peak capacity and ability to absorb inferior coal are not strong. Alternatively, additional coal transfer equipment is needed for transfer, but the structure is complex and the operation is cumbersome, which affects the timely supply of coal to the boiler. Summary of the invention

[0004] The purpose of the present invention is to provide a double-bin interconnected coal conveying mechanism for raw coal bunkers, so as to solve the technical problems of complicated operation and low working efficiency when switching coal types in the coal conveying system in the prior art. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The double-bin interconnected coal conveying mechanism for raw coal bunkers provided by the present invention comprises a guide plate assembly, a support frame, a driving mechanism and a conveying assembly, wherein:

[0007] The guide plate assembly is respectively fixed to the opposite ends of the support frame, the guide plate assembly at one end of the support frame extends into the lower hopper of one raw coal bunker, and the guide plate assembly at the other end of the support frame extends into the lower hopper of another raw coal bunker, for guiding the coal to the conveying assembly.

[0008] The driving mechanism is in transmission connection with the conveying assembly. Under the drive of the driving mechanism, the conveying assembly is arranged on the support frame to be reciprocally movable between two raw coal bins, thereby realizing the transmission of coal between different raw coal bins.

[0009] Preferably, the outer cover of the conveying assembly is provided with a sealing cover, and the sealing cover is fixedly connected to the support frame;

[0010] The conveying assembly comprises a conveying belt and a skirt plate, wherein: the driving mechanism is drivingly connected to the conveying belt, and the conveying belt is movably arranged on the supporting frame;

[0011] The skirt plate is fixed to the opposite sides of the conveyor belt. The skirt plate is a curved plate structure or a bent plate structure, and is used to assist in increasing the material accumulation capacity of the conveyor belt.

[0012] Preferably, the double-bin interconnected coal conveying mechanism for the raw coal bunker further includes a gate valve, which is fixed on the lower hopper of the raw coal bunker. The gate valve includes two oblique gate doors, which can be opened and closed separately to control the coal flow.

[0013] Preferably, the raw coal bunker double-bin interconnected coal conveying mechanism further includes a scraper assembly, the scraper assembly is located at opposite ends of the support frame, and the scraper assembly includes a scraper shell and a scraper body, wherein:

[0014] There are at least two scraper shells, which are fixed to opposite sides of the bottom of the support frame respectively, and the scraper body is fixedly connected between the two scraper shells to scrape the coal on the conveyor belt;

[0015] The two opposite ends of the scraper shell are open, and the skirt plate located at the bottom of the support frame passes through the scraper shell. The scraper shell is used to scrape coal on the skirt plate.

[0016] Preferably, the guide plate assembly comprises two guide plate bodies, the guide plate bodies are fixed to opposite sides of the support frame, the feed end of the conveying assembly is located between the two guide plate bodies, and the sides of the guide plate bodies are provided with pointed cones, and along the thickness direction of the guide plate bodies, the height of the pointed cones gradually decreases from the middle of the guide plate bodies to the two sides;

[0017] The guide plate assembly also includes a compartment guide baffle, which is fixed to the inner wall of the lower hopper of the raw coal bin and arranged vertically to divide the lower hopper into two parts, large and small.

[0018] The guide plate assembly also includes a reinforcing rib plate, one end of which is fixed to the guide plate body, and the other end of which is fixed to the compartment guide baffle.

[0019] Preferably, the driving mechanism comprises a driving device, a driving sprocket, a driven sprocket and a roller located in the supporting frame and rotatably connected to the supporting frame, wherein:

[0020] There are two rollers respectively located at two ends of the support frame, and the conveying assembly is wound around the two rollers;

[0021] A clearance groove is arranged in the middle of the drum, the driven sprocket is fixed in the clearance groove and arranged coaxially with the drum, the driving device is fixed on the support frame, the driving device is connected to the driving sprocket, and the driving sprocket and the driven sprocket are driven by a chain, thereby driving the drum to rotate.

[0022] Preferably, the driving mechanism is located at opposite ends of the support frame, and the raw coal bunker double-bin intercommunication coal conveying mechanism further includes a tensioning device, and the tensioning device includes a hand crank, a worm and a tensioning wheel, wherein:

[0023] The hand crank is rotatably connected to the side wall of the support frame, and a hand crank wheel is fixed to one end of the hand crank located outside the support frame, a worm wheel is fixed to the hand crank, the worm wheel is meshed with the worm for transmission, and the tensioning wheel is rotatably connected to one end of the worm and abuts against the surface of the roller.

[0024] Preferably, a guide groove is provided on the side wall of the support frame, and the guide groove is arranged along the length direction of the conveying component. When the hand-cranked wheel is rotated, the rotating shaft portion of the roller is located in the guide groove and moves along the length direction of the guide groove.

[0025] Preferably, the raw coal bunker double-bin interconnected coal conveying mechanism further includes rollers, wherein:

[0026] The rollers are located in the support frame and are rotatably connected to the side walls of the support frame. The rollers support the conveying assembly and are arranged at intervals along the length direction of the support frame.

[0027] Preferably, the raw coal bunker double-bin interconnected coal conveying mechanism further includes a weighing sensor, a speed measuring wheel and a control unit, wherein:

[0028] The weighing sensor is connected to the roller in a floating manner and is used to detect the weight of the coal material to be weighed on the conveying assembly;

[0029] The speed measuring wheel is used to detect the moving speed of the conveying assembly. The control unit is electrically connected to the weighing sensor and the speed measuring wheel, and is used to calculate the coal conveying flow rate of the conveying assembly according to the speed of the conveying assembly and the weight of the coal to be weighed.

[0030] Preferably, the double-bin interconnected coal transportation mechanism for raw coal bunkers further comprises a protective shell, which is located inside the raw coal bunker, and a material level meter and a camera device are arranged inside the protective shell, and only the lower part of the protective shell is open.

[0031] The double-bin interconnected coal conveying mechanism for raw coal bins provided by the present invention has the following beneficial effects compared with the prior art: one of the two raw coal bins stores high calorific value coal, and the other stores low calorific value coal. When the gate valve of the first raw coal bin is opened and the gate valve of the second raw coal bin is closed, the driving mechanism drives the conveying assembly to move, and the coal in the first raw coal bin is conveyed to the second raw coal bin, and the coal falls into the corresponding coal feeder below the second raw coal bin. Conversely, when the gate valve of the first raw coal bin is closed and the gate valve of the second raw coal bin is opened, the driving mechanism drives the conveying assembly to move, and the coal in the second raw coal bin is conveyed to the first raw coal bin, and the coal falls into the corresponding coal feeder below the first raw coal bin. With such an arrangement, each raw coal bin can convey different types of coal to the coal feeder below, and there is no need to wait for the original coal type in the raw coal bin to be unloaded and then re-loaded when switching coal types. The working efficiency is high, the transformation cost is low, the later maintenance is convenient, and there is no increase in any risk of coal blockage, so that the power plant can more flexibly adjust the use of coal types according to market demand and fuel supply conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is an overall schematic diagram of the coordination between the double-bin interconnected coal transport mechanism of the raw coal bunker and the two raw coal bunkers;

[0034] Figure 2 It is a cross-sectional view of the coordination between the double-bin interconnected coal transport mechanism of the raw coal bunker and the two raw coal bunkers;

[0035] Figure 3 It is a three-dimensional structural diagram of the interconnected coal transportation mechanism of the raw coal bunker and the double bunkers;

[0036] Figure 4 It is a side view of the intercommunication coal transportation mechanism of the double bunkers of the raw coal bunker;

[0037] Figure 5 It is a cross-sectional view of the intercommunication coal transportation mechanism of the double-bin raw coal bunker;

[0038] Figure 6 It is a schematic diagram of the structure of the driving mechanism;

[0039] Figure 7 It is a top view structural diagram of the driving mechanism.

[0040] In the figure, 100 is the coal conveying mechanism; 200 is the raw coal bin; 300 is the gate valve; 1 is the guide plate assembly; 11 is the guide plate body; 12 is the reinforcing rib plate; 13 is the compartment guide baffle; 2 is the support frame; 21 is the roller; 22 is the guide groove; 3 is the driving mechanism; 31 is the driving device; 32 is the driving sprocket; 33 is the driven sprocket; 34 is the roller; 341 is the clearance groove; 4 is the conveying assembly; 41 is the conveyor belt; 42 is the skirt plate; 5 is the sealing cover; 6 is the scraper assembly; 61 is the scraper shell; 62 is the scraper body; 71 is the hand crank; 72 is the worm; 73 is the tensioning wheel; 74 is the hand crank; 8 is the weighing sensor; 9 is the protective shell; 91 is the material level meter; 92 is the camera. DETAILED DESCRIPTION

[0041] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0043] In the prior art, coal is stored in raw coal bins. A coal feeder is provided under the lower hopper of each raw coal bin. When the gate at the lower hopper of the raw coal bin is opened, the coal can be fed to the coal feeder, thereby transporting and using the coal. The unit requires different types of coal under different load conditions. When it needs to switch between coal types with different calorific values, it can only wait until the original coal types in the raw coal bin are consumed before re-loading the coal, which cannot meet the unit's rapid load change requirements. Therefore, the quality of the coal entering the furnace is limited, and the boiler's peak capacity and its ability to absorb inferior coal are not strong. Alternatively, additional coal transfer equipment is required for transfer, but the structure is complex and the operation is cumbersome, which affects the timely coal supply to the boiler.

[0044] The embodiment of the present invention provides a double-bin interconnected coal conveying mechanism 100 for raw coal bins. Each raw coal bin 200 can convey different types of coal to the coal feeder below. There is no need to wait for the original type of coal in the raw coal bin 200 to be unloaded and re-loaded when switching the type of coal. The work efficiency is high, the transformation cost is low, the later maintenance is convenient, and there is no increase in any risk of coal blockage, so that the power plant can more flexibly adjust the use of coal types according to market demand and fuel supply conditions.

[0045] Combine the following Figure 1-Figure 7 The technical solution provided by the present invention is described in more detail.

[0046] Embodiment 1:

[0047] See also Figure 1-Figure 7 As shown, the double-bin interconnected coal conveying mechanism 100 for raw coal bins provided by the present invention includes a guide plate assembly 1, a support frame 2, a driving mechanism 3 and a conveying assembly 4, wherein: the guide plate assembly 1 is respectively fixed to the opposite ends of the support frame 2, the guide plate assembly 1 at one end of the support frame 2 extends into the lower hopper of one raw coal bin 200, and the guide plate assembly 1 at the other end of the support frame 2 extends into the lower hopper of another raw coal bin 200, so as to guide the coal to the conveying assembly 4, the driving mechanism 3 is transmission-connected with the conveying assembly 4, and under the drive of the driving mechanism 3, the conveying assembly 4 is arranged on the support frame 2 to be reciprocatingly movable between the two raw coal bins 200, thereby realizing the transmission of coal between different raw coal bins 200.

[0048] The support frame 2 can be made of channel steel, and the channel steel structure is a three-stage structure. The installation height of the coal conveying mechanism 100 is at 1500mm of the inner diameter of the raw coal bin 200, and the length of the guide plate inserted into the raw coal bin 200 is 750mm (not limited to this size).

[0049] See also Figure 1 and Figure 2 As shown, there are at least two raw coal bins 200 in this embodiment, one of which stores high calorific value coal and the other stores low calorific value coal. When the gate valve 300 of the first raw coal bin 200 (which can be called the left raw coal bin 200) is opened and the gate valve 300 of the second raw coal bin 200 (which can be called the right raw coal bin 200) is closed, the driving mechanism 3 drives the conveying assembly 4 to move, and the coal in the first raw coal bin 200 is conveyed to the second raw coal bin 200, and falls under the second raw coal bin 200. Corresponding coal feeder, on the contrary, when the gate valve 300 of the first raw coal bin 200 is closed and the gate valve 300 of the second raw coal bin 200 is opened, the driving mechanism 3 drives the conveying assembly 4 to move, and the coal in the second raw coal bin 200 is transported to the first raw coal bin 200, and falls into the corresponding coal feeder below the first raw coal bin 200. In this way, each coal feeder can receive different types of coal from the two raw coal bins 200, and there is no need to wait for the original type of coal in the raw coal bin 200 to be unloaded when switching the type of coal.

[0050] As an alternative embodiment, see Figure 3 and Figure 4 As shown, the outer cover of the conveying component 4 is provided with a sealing cover 5, which is fixedly connected to the support frame 2; the sealing cover 5 can prevent coal ash from entering the external environment and polluting the environment, and can also prevent impurities such as dust in the external environment from polluting the coal.

[0051] See also Figure 3 As shown, the conveying assembly 4 includes a conveyor belt 41 and a skirt plate 42, wherein: the driving mechanism 3 is connected to the conveyor belt 41, and the conveyor belt 41 is movably arranged on the support frame 2; the skirt plate 42 is fixed to the opposite sides of the conveyor belt 41, and the skirt plate 42 is a curved plate structure or a bent plate structure, which is used to assist in increasing the material stacking capacity of the conveyor belt 41.

[0052] The height of the skirt plate 42 is greater than 150 mm, and the width of the skirt plate 42 is less than the width of the guide plate body 11. The gate valve 300 is arranged at the position of 2000 mm inner diameter of the raw coal bin 200, and the coal flow area at the gate valve 300 is twice that before the transformation.

[0053] The conveyor belt 41 can be a soft belt such as a belt, and the conveyor belt 41 moves back and forth between the two raw coal bins 200. The coal is placed on the conveyor belt 41, and different types of coal can be moved between the two raw coal bins 200. The above structure of the skirt plate 42 can prevent the coal from falling during the movement of the conveyor belt 41, and can increase the coal conveying capacity of the conveyor belt 41.

[0054] As an alternative embodiment, see Figure 3 As shown, the raw coal bunker double-bin interconnected coal conveying mechanism 100 also includes a scraper assembly 6, which is located at opposite ends of the support frame 2 and is used to scrape coal off the conveyor belt 41 and the skirt plate 42.

[0055] For details, see Figure 3 As shown, the scraper assembly 6 includes a scraper shell 61 and a scraper body 62, wherein: there are at least two scraper shells 61, which are respectively fixed on the opposite sides of the bottom of the support frame 2, and the scraper body 62 is fixedly connected between the two scraper shells 61 to scrape the coal on the conveyor belt 41; the opposite ends of the scraper shells 61 are open, and the skirt plate 42 located at the bottom of the support frame 2 passes through the scraper shells 61, and the scraper shells 61 are used to scrape the coal on the skirt plate 42.

[0056] Among them, see Figure 3 As shown, the scraper shell 61 is fixed to the support frame 2 or to the sealing cover 5, and both ends of the scraper shell 61 are open to facilitate the skirt plate 42 to pass through. The transverse cross-section of the scraper shell 61 is a U-shaped structure, and the inner wall of the scraper shell 61 scrapes the coal on the skirt plate 42 without affecting the movement of the skirt plate 42.

[0057] The scraper is arranged along the width direction of the conveyor belt 41. Figure 3 As shown, the scraper can scrape the coal on the conveyor belt 41 moving to the lower part of the support frame 2.

[0058] The scraper assembly 6 does not affect the movement of the conveying assembly 4 , and can simultaneously scrape the coal on the conveyor belt 41 and the skirt plate 42 , thereby preventing the loss of coal and the accumulation of coal on the conveying assembly 4 .

[0059] The raw coal bunker double-bin intercommunication coal conveying mechanism also includes a gate valve 300, which is fixed on the lower hopper of the raw coal bunker. The gate valve 300 includes two oblique gates, which can be opened and closed to control the coal flow respectively. For example, it can be opened by a driving cylinder.

[0060] As an alternative embodiment, see Figure 3 and Figure 4 As shown, the guide plate assembly 1 includes two guide plate bodies 11, which are fixed on opposite sides of the support frame 2, and the feeding end of the conveying assembly 4 is located between the two guide plate bodies 11. A pointed cone portion is provided on the side of the guide plate body 11, and along the thickness direction of the guide plate body 11, the height of the pointed cone portion gradually decreases from the middle of the guide plate body 11 to both sides.

[0061] The guide plate assembly also includes a compartment guide baffle 13, which is fixed to the inner wall of the lower hopper of the raw coal bin 200 and arranged vertically to divide the lower hopper into two large and small parts; the guide plate assembly also includes a reinforcing rib plate 12, one end of the reinforcing rib plate 12 is fixed to the guide plate body 11, and the other end is fixed to the compartment guide baffle 13.

[0062] With the above structure of the guide plate, when the gate of the raw coal bin 200 is opened, the coal falling from the raw coal bin 200 can be moved to the conveying assembly 4 between the two guide plate bodies 11 under the guidance of the pointed cone, that is, the coal falls into the feeding end of the conveying assembly 4 and is transported along with the conveying assembly 4, thereby preventing the coal from deviating from the target position.

[0063] The side wall of the raw coal bin 200 is opened with a hole for the guide plate body 11 to extend into the interior of the raw coal bin 200. The above structure improves the stable matching effect between the guide plate assembly 1 and the raw coal bin 200.

[0064] The structure of the compartment guide baffle 13 and the gate valve 300 divides the lower hopper of the raw coal bin 200 into two parts, which are convenient for separate maintenance. When the belt side is repaired, the coal discharge on the other side will not be affected; the coordination of the guide plate and the opening and closing size of the upper gate valve can accurately control the amount of coal discharged and blend the coal for combustion. Figure 2As shown, when the gate valve 300 is opened, a portion of the coal falls from the compartment guide baffle 13 into the coal feeder directly below, and a portion of the coal is transported to the coal feeder on the other side through the conveying assembly 4.

[0065] As an alternative embodiment, see Figure 5-Figure 7 As shown, the driving mechanism 3 of this embodiment includes a driving device 31, a driving sprocket 32, a driven sprocket 33 and a roller 34, which are located in the support frame 2 and rotatably connected to the support frame 2, wherein: there are two rollers 34 respectively located at the two ends of the support frame 2, and the conveying assembly 4 is wound around the two rollers 34; a clearance groove 341 is provided in the middle of the roller 34, the driven sprocket 33 is fixed in the clearance groove 341, and is coaxially arranged with the roller 34, the driving device 31 is fixed on the support frame 2, the driving device 31 is connected to the driving sprocket 32, and the driving sprocket 32 ​​and the driven sprocket 33 are driven by a chain transmission, thereby driving the roller 34 to rotate.

[0066] The driving device 31 is arranged outside the raw coal bin 200, the rotation speed of the driving device 31 matches the rotation speed of the coal feeder, and the coal conveying capacity of the conveying assembly 4 meets the maximum output of the coal mill.

[0067] The driving device 31 can be a variable frequency motor. The driving device 31 drives the driving sprocket 32 ​​to rotate. The driving sprocket 32 ​​drives the driven sprocket 33 to rotate through the chain. Since the driven sprocket 33 is fixed in the clearance groove 341 of the roller 34, the roller 34 can rotate, thereby using friction to drive the conveyor belt 41 to move. The driven sprocket 33 is fixed in the clearance groove 341, which does not affect the conveyor belt 41 from being attached to the surface of the roller 34, and the driving device 31 can drive the roller 34 to rotate.

[0068] In order to prevent the conveyor belt 41 from slipping, deflecting, etc., see Figure 2 and Figure 5 As shown, the driving mechanism 3 of this embodiment is located at two opposite ends of the support frame 2.

[0069] As an alternative embodiment, see Figure 4 and Figure 7 As shown, the raw coal bunker double-bin interconnected coal conveying mechanism 100 also includes a tensioning device, which includes a hand crank 71, a worm 72 and a tensioning wheel 73, wherein: the hand crank 71 is rotatably connected to the side wall of the support frame 2, and a hand crank 74 is fixed to one end of the hand crank 71 located outside the support frame 2, a worm wheel is fixed to the hand crank 71, the worm wheel is meshed with the worm 72 for transmission, and the tensioning wheel 73 is rotatably connected to one end of the worm 72 and abuts against the surface of the drum 34.

[0070] See also Figure 4As shown, a guide groove 22 is provided on the side wall of the support frame 2 , and the guide groove 22 is provided along the length direction of the conveying assembly 4 . When the hand-cranked wheel 74 is turned, the rotating shaft of the roller 34 is located in the guide groove 22 and moves along the length direction of the guide groove 22 .

[0071] When the hand wheel 74 is rotated, the hand wheel 74 drives the hand crank 71 to rotate clockwise, and the worm gear (not shown in the figure) on the hand crank 71 drives the worm 72 and the tensioning wheel 733 to move synchronously, pushing the roller 34 outward along the guide groove 22 to tension the conveyor belt 41.

[0072] As an alternative embodiment, see Figure 5 As shown, the raw coal bunker double-bin interconnected coal conveying mechanism 100 also includes rollers 21, wherein: the rollers 21 are located in the support frame 2 and are rotatably connected to the side walls of the support frame 2, the rollers 21 support the conveying assembly 4, and the rollers 21 are arranged at intervals along the length direction of the support frame 2.

[0073] The rollers 21 play the role of supporting the upper conveyor belt 41. When coal is placed on the conveyor belt 41, the rollers 21 support the conveyor belt 41, which can prevent the conveyor belt 41 from collapsing and ensure the stable movement of the conveyor belt 41.

[0074] As an alternative embodiment, see Figure 4 As shown, the raw coal bunker double-bin interconnected coal conveying mechanism 100 also includes a weighing sensor 8, a speed measuring wheel and a control unit, wherein: the weighing sensor 8 is floatingly connected to the roller 21, and is used to detect the weight of the coal to be weighed on the conveying component 4; the speed measuring wheel is used to detect the moving speed of the conveying component 4, and the control unit is electrically connected to the weighing sensor 8 and the speed measuring wheel, and is used to calculate the coal conveying flow rate of the conveying component 4 according to the speed of the conveying component 4 and the weight of the coal to be weighed.

[0075] The weighing sensor 8 and the speed measuring wheel are existing mature technologies, and their structures are not described in detail here. The speed measuring wheel can be placed on the bearing of the roller 21, and the weighing sensor 8 can be installed on the bearing of another roller 21 through a nut.

[0076] As an alternative embodiment, see Figure 2 As shown, the raw coal bunker double-bin intercommunication coal conveying mechanism 100 also includes a protective shell 9, which is located inside the raw coal bunker 200. A material level meter 91 and a camera device are arranged inside the protective shell 9, and only the lower part of the protective shell 9 is open. The camera device can be a camera 92 in the prior art.

[0077] A hand hole is opened on one side of the protective shell 9 connected to the raw coal bin 200. The bottom of the protective shell 9 is open, and the top and other three sides are closed. The material level meter 91 and the camera 92 in the protective shell 9 can be installed and repaired through the hand hole. The material level meter 91 detects the coal level at the coal drop port under the protective shell 9 in real time, and is linked with the driving mechanism 3 in the control system to adjust the speed of the driving device 31 according to the coal level. The bottom opening of the protective shell 9 extends downward to prevent coal from accumulating upward and affecting the work of the material level meter 91 and the camera 92.

[0078] The dual-bin intercommunication coal conveying mechanism 100 of the raw coal bunker of this embodiment has the following advantages: without changing the original coal conveying system, only by raising the position of the gate valve 300 and adding the coal conveying mechanism 100, the coal quality between the two raw coal bunkers 200 can be interconnected and the coal type can be quickly changed. One bunker is loaded with high calorific value coal, and the other bunker is loaded with low calorific value coal. The two bunkers are interconnected in real time to convey coal, and at the same time, the coal type suitable for the load is provided to the coal feeder.

[0079] The raw coal bunker double-bin interconnected coal conveying mechanism 100 has low transformation cost, convenient later maintenance, and will not increase any risk of coal blockage, so that the power plant can more flexibly adjust the type of coal used according to market demand and fuel supply, more effectively utilize coal resources, and improve the flexibility, economy, safety and stability of unit operation.

[0080] In the description of this specification, specific features, structures or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0082] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A coal conveying mechanism for interconnecting two raw coal bunkers, characterized in that: It includes a guide plate assembly, a support frame, a driving mechanism and a conveying assembly, wherein: The guide plate assembly is respectively fixed to opposite ends of the support frame, the guide plate assembly at one end of the support frame extends into the lower hopper of one raw coal bin, and the guide plate assembly at the other end of the support frame extends into the lower hopper of another raw coal bin, for guiding the coal to the conveying assembly; The driving mechanism is in transmission connection with the conveying assembly. Under the drive of the driving mechanism, the conveying assembly is arranged on the support frame to be reciprocally movable between two raw coal bins, thereby realizing the transmission of coal between different raw coal bins.

2. The double-compartment interconnected coal transport mechanism for raw coal bunkers according to claim 1 is characterized in that: The outer cover of the conveying assembly is provided with a sealing cover, and the sealing cover is fixedly connected to the support frame; The conveying assembly comprises a conveying belt and a skirt plate, wherein: the driving mechanism is drivingly connected to the conveying belt, and the conveying belt is movably arranged on the supporting frame; The skirt plate is fixed to the opposite sides of the conveyor belt. The skirt plate is a curved plate structure or a bent plate structure, and is used to assist in increasing the material accumulation capacity of the conveyor belt.

3. The double-compartment interconnected coal transport mechanism for raw coal bunkers according to claim 1 is characterized in that: The double-bin interconnected coal conveying mechanism for the raw coal bunker also includes a gate valve, which is fixed on the lower hopper of the raw coal bunker. The gate valve includes two oblique gate doors, which can be opened and closed separately to control the coal flow.

4. The double-compartment interconnected coal transport mechanism for raw coal bunkers according to claim 2 is characterized in that: The raw coal bunker double-bin intercommunication coal conveying mechanism further includes a scraper assembly, which is located at opposite ends of the support frame, and the scraper assembly includes a scraper shell and a scraper body, wherein: There are at least two scraper shells, which are fixed to opposite sides of the bottom of the support frame respectively, and the scraper body is fixedly connected between the two scraper shells to scrape the coal on the conveyor belt; The two opposite ends of the scraper shell are open, and the skirt plate located at the bottom of the support frame passes through the scraper shell. The scraper shell is used to scrape coal on the skirt plate.

5. The double-compartment interconnected coal transport mechanism for raw coal bunkers according to claim 1, characterized in that: The guide plate assembly includes two guide plate bodies, the guide plate bodies are fixed to opposite sides of the support frame, the feed end of the conveying assembly is located between the two guide plate bodies, and the sides of the guide plate bodies are provided with pointed cones, and along the thickness direction of the guide plate bodies, the height of the pointed cones gradually decreases from the middle of the guide plate bodies to the two sides; The guide plate assembly also includes a compartment guide baffle, which is fixed to the inner wall of the lower hopper of the raw coal bin and arranged vertically to divide the lower hopper into two parts, large and small. The guide plate assembly also includes a reinforcing rib plate, one end of which is fixed to the guide plate body, and the other end of which is fixed to the compartment guide baffle.

6. The double-compartment interconnected coal transport mechanism for raw coal bunkers according to claim 1, characterized in that: The driving mechanism includes a driving device, a driving sprocket, a driven sprocket and a roller located in the support frame and rotatably connected to the support frame, wherein: There are two rollers respectively located at two ends of the support frame, and the conveying assembly is wound around the two rollers; A clearance groove is arranged in the middle of the drum, the driven sprocket is fixed in the clearance groove and arranged coaxially with the drum, the driving device is fixed on the support frame, the driving device is connected to the driving sprocket, and the driving sprocket and the driven sprocket are driven by a chain, thereby driving the drum to rotate.

7. The double-compartment interconnected coal transport mechanism for raw coal bunkers according to claim 6 is characterized in that: The driving mechanism is located at opposite ends of the support frame, and the raw coal bunker double-bin intercommunication coal conveying mechanism also includes a tensioning device, which includes a hand crank, a worm and a tensioning wheel, wherein: The hand crank is rotatably connected to the side wall of the support frame, and a hand crank wheel is fixed to one end of the hand crank located outside the support frame, a worm wheel is fixed to the hand crank, the worm wheel is meshed with the worm for transmission, and the tensioning wheel is rotatably connected to one end of the worm and abuts against the surface of the roller.

8. The double-compartment interconnected coal transport mechanism for raw coal bunkers according to claim 7 is characterized in that: A guide groove is arranged on the side wall of the support frame, and the guide groove is arranged along the length direction of the conveying assembly. When the hand-cranked wheel is rotated, the rotating shaft of the roller is located in the guide groove and moves along the length direction of the guide groove.

9. The double-compartment interconnected coal transport mechanism for raw coal bunkers according to claim 1, characterized in that: The raw coal bunker double-bin intercommunication coal conveying mechanism also includes rollers, wherein: The rollers are located in the support frame and are rotatably connected to the side walls of the support frame. The rollers support the conveying assembly and are arranged at intervals along the length direction of the support frame.

10. The double-compartment interconnected coal transport mechanism for raw coal bunkers according to claim 9, characterized in that: The raw coal bunker double-bin interconnected coal conveying mechanism also includes a weighing sensor, a speed measuring wheel and a control unit, wherein: The weighing sensor is connected to the roller in a floating manner and is used to detect the weight of the coal material to be weighed on the conveying assembly; The speed measuring wheel is used to detect the moving speed of the conveying assembly, and the control unit is electrically connected to the weighing sensor and the speed measuring wheel, and is used to calculate the coal conveying flow rate of the conveying assembly according to the speed of the conveying assembly and the weight of the coal to be weighed; The raw coal bunker double-bin interconnected coal transportation mechanism also includes a protective shell, which is located inside the raw coal bunker. A material level meter and a camera device are arranged inside the protective shell, and only the lower part of the protective shell is open.

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